JP7021743B2

JP7021743B2 - Bushing cover

Info

Publication number: JP7021743B2
Application number: JP2018000691A
Authority: JP
Inventors: 義行坂口; 泰至岸
Original assignee: Aichi Electric Co Ltd
Current assignee: Aichi Electric Co Ltd
Priority date: 2018-01-05
Filing date: 2018-01-05
Publication date: 2022-02-17
Anticipated expiration: 2038-01-05
Also published as: JP2019122155A

Description

特許法第３０条第２項適用特許法第３０条第２項適用、北海道電力株式会社に納品Patent Law Article 30 Paragraph 2 Applicable Patent Law Article 30 Paragraph 2 Applicable, delivered to Hokkaido Electric Power Co., Inc.

本発明は、ＳＶＲ等の配電用機器の筐体上面その他の土台部から上方に延びる電線路に形成された充電部を覆うブッシングカバーに関する。 The present invention relates to a bushing cover that covers a charging portion formed in an electric line extending upward from a housing upper surface or other base portion of a power distribution device such as an SVR.

ＳＶＲ（自動電圧調整器：ＳｔｅｐＶｏｌｔａｇｅＲｅｇｕｌａｔｏｒ）には、その筐体上面から重力方向に沿って上方に延びる電線路が形成される。図６に示すように、電線路１００は、ＳＶＲ４００の筐体の上面４０１上に設置される碍子部１１０、この碍子部１１０上に形成される充電部１４０、及び、充電部１４０から上方に向かって延びる被覆電路部１８０を有する。 In the SVR (automatic voltage regulator: Step Voltage Regulator), an electric line extending upward from the upper surface of the housing along the direction of gravity is formed. As shown in FIG. 6, the electric line 100 faces upward from the insulator portion 110 installed on the upper surface 401 of the housing of the SVR 400, the charging portion 140 formed on the insulator portion 110, and the charging portion 140. It has a covered electric line portion 180 extending from the insulator.

ところで、ＳＶＲ４００の筐体の上面４０１から延びる電線路１００には、鳥獣害対策のため、充電部１４０を覆うブッシングカバー３００が取り付けられる。 By the way, a bushing cover 300 that covers the charging unit 140 is attached to the electric line 100 extending from the upper surface 401 of the housing of the SVR 400 as a measure against damage to birds and beasts.

ブッシングカバー３００としては、ゴムで構成された図６に示す例が知られている。この例のブッシングカバー３００は、ＳＶＲ４００の筐体の上面４０１から延びる電線路１００のうち、充電部１４０の全部、及び、充電部１４０から上方に向かって延線された被覆電路部１８０の下方側の一部、を覆うことができる。 As the bushing cover 300, an example shown in FIG. 6 made of rubber is known. The bushing cover 300 of this example is the entire electric line 100 extending from the upper surface 401 of the housing of the SVR 400, and the lower side of the covered electric line portion 180 extending upward from the charging portion 140. Can cover part of.

このブッシングカバー３００の上方側の開口である上方開口３１０の内径は、被覆電路部１８０を構成する被覆された配電線２００の外径と略同じ大きさに形成されている。ブッシングカバー３００がＳＶＲ４００の筐体の上面４０１から延びる電線路１００に取り付けられるとき、この上方開口３１０には被覆された配電線２００が通される。そして、ブッシングカバー３００の上端が位置する部分で、被覆された配電線２００からブッシングカバー３００の上端部分にかけて絶縁テープを巻きつけて、ブッシングカバー３００の上方開口３１０から当該ブッシングカバー３００内に水が浸入しないようにするとともに、ブッシングカバー３００を被覆電線に固定する。 The inner diameter of the upper opening 310, which is the upper opening of the bushing cover 300, is formed to be substantially the same as the outer diameter of the covered distribution line 200 constituting the coated electric line portion 180. When the bushing cover 300 is attached to the electric line 100 extending from the upper surface 401 of the housing of the SVR 400, the covered distribution line 200 is passed through the upper opening 310. Then, at the portion where the upper end of the bushing cover 300 is located, an insulating tape is wound from the covered distribution wire 200 to the upper end portion of the bushing cover 300, and water flows into the bushing cover 300 from the upper opening 310 of the bushing cover 300. The bushing cover 300 is fixed to the covered electric wire while preventing the intrusion.

しかし、雪が多い海沿いの地域では、絶縁テープが劣化しやすく、劣化すると、ブッシングカバー３００の上方開口３１０から、ブッシングカバー３００の内部に塩を含んだ塩水が侵入することがある。
ブッシングカバー３００内に塩水が侵入すると、その塩水は、図６中に符号ＸやＹで示すように、ブッシングカバー３００の上方開口３１０から、ブッシングカバー３００の内壁面上や充電部１４０上を流れ、ブッシングカバー３００の下方側の開口から外部に出る。そして、ブッシングカバー３００の下方側の開口から外部に出た塩水は、碍子部１１０を構成する一番上の碍子１３０の傘部１３１上を流れる。 However, in areas along the sea where there is a lot of snow, the insulating tape is liable to deteriorate, and when it deteriorates, salt water containing salt may invade the inside of the bushing cover 300 from the upper opening 310 of the bushing cover 300.
When salt water enters the bushing cover 300, the salt water flows from the upper opening 310 of the bushing cover 300 on the inner wall surface of the bushing cover 300 and on the charging portion 140, as indicated by reference numerals X and Y in FIG. , Go out through the lower opening of the bushing cover 300. Then, the salt water that has flowed out from the opening on the lower side of the bushing cover 300 flows on the umbrella portion 131 of the top insulator 130 constituting the insulator portion 110.

塩水が上記のようにブッシングカバー３００内を流れると、塩水のうち水分だけが飛び、塩水が通った道筋に沿って塩が残る場合がある。そして、その道筋に沿って、塩水が繰り返し流れると、ブッシングカバー３００内には、ブッシングカバー３００の上方開口３１０から下方側の開口に至る、塩で形成された路（塩水路）が形成されることがある。
この塩水路が形成されると、ブッシングカバー３００内を流れる塩水の多くは、この塩水路を伝って流れ、ブッシングカバー３００の下方側の開口のうち、塩水路の下端近傍の一定の場所から、外部に流れ出る。 When salt water flows through the bushing cover 300 as described above, only the water content of the salt water flies, and salt may remain along the path through which the salt water passes. Then, when salt water repeatedly flows along the path, a path (salt water channel) formed of salt is formed in the bushing cover 300 from the upper opening 310 to the lower opening of the bushing cover 300. Sometimes.
When this salt water channel is formed, most of the salt water flowing in the bushing cover 300 flows along the salt water channel, and from a certain place near the lower end of the salt water channel in the opening on the lower side of the bushing cover 300. It flows out.

すると、ブッシングカバー３００内から碍子１３０に流れ出た塩水は、ブッシングカバー３００内に形成された塩水路の下端近傍の一定の場所から流れ出るため、上述した３つの碍子１３０のうち一番上の碍子１３０にも、塩水路が形成されることがある。具体的には、図６中に符号Ｚで示したように、碍子１３０の突状部１３２の上端から碍子１３０の傘部１３１の外縁まで塩水が繰り返し流れて、結果的に塩水路が形成されることがある。 Then, the salt water that has flowed out from the bushing cover 300 to the insulator 130 flows out from a certain place near the lower end of the salt water channel formed in the bushing cover 300, so that the uppermost insulator 130 among the above-mentioned three insulators 130 is used. Also, salt canals may be formed. Specifically, as shown by reference numeral Z in FIG. 6, salt water repeatedly flows from the upper end of the protruding portion 132 of the insulator 130 to the outer edge of the umbrella portion 131 of the insulator 130, and as a result, a salt water channel is formed. There are times.

この碍子１３０の突状部１３２の上端部分は、充電部１４０に近接しているので、碍子１３０に形成された塩水路は、充電部１４０から、碍子１３０の外縁に至る電路となる。そのため、ＳＶＲ４００の筐体の上面４０１上に雪が積もり、その積もった雪がその碍子１３０近くに達すると、その雪も電路となり、充電部１４０からＳＶＲ４００の筐体の上面に至る電路が形成されて、充電部１４０からＳＶＲ４００の筐体の上面４０１に漏電する地絡が発生してしまうおそれがあった。 Since the upper end portion of the protruding portion 132 of the insulator 130 is close to the charging portion 140, the salt water channel formed in the insulator 130 becomes an electric wire from the charging portion 140 to the outer edge of the insulator 130. Therefore, when snow accumulates on the upper surface 401 of the housing of the SVR 400 and the accumulated snow reaches the vicinity of the insulator 130, the snow also becomes an electric circuit, and an electric circuit from the charging unit 140 to the upper surface of the housing of the SVR 400 is formed. There was a risk that a ground fault would occur from the charging unit 140 to the upper surface 401 of the housing of the SVR 400.

本発明は、土台部から上方に延びる電線路に形成された充電部を覆うブッシングカバーであって、当該ブッシングカバー内に塩水が侵入し、土台部上に雪が積もっても、充電部から雪を介して土台部に漏電する地絡が発生する確率を低く抑えることができるブッシングカバーを提供する。 The present invention is a bushing cover that covers a charging portion formed on an electric line extending upward from a base portion, and even if salt water invades the bushing cover and snow accumulates on the base portion, snow is removed from the charging portion. Provided is a bushing cover that can reduce the probability of a ground fault that leaks to the base portion through the bushing cover.

（１）本発明のブッシングカバーは、土台部から重力方向に沿って上方に延びる電線路であって、土台部上に設置された碍子部、碍子部上に形成された充電部、及び、充電部から上方に向かって延びる被覆電路部を有する電線路に取り付けられるカバーである。 (1) The bushing cover of the present invention is an electric line extending upward from the base portion in the direction of gravity, and is an insulator portion installed on the base portion, a charging portion formed on the insulator portion, and charging. It is a cover attached to an electric line having a covered electric line portion extending upward from the portion.

本発明のブッシングカバーは、充電部の全部、及び、被覆電路部の下方側の一部を、重力方向に沿った軸周りに囲う囲繞部であって、少なくとも充電部については、充電部から離れた位置で囲う囲繞部と、充電部の所定部位に嵌る嵌合開口を有する水受部であって、嵌合開口に充電部の所定部位が嵌まるように充電部に取り付けられると、当該水受部よりも上方側の囲繞空間を閉じるとともに、囲繞空間内を流れる水を受ける水受部と、を備えている。 The bushing cover of the present invention is a surrounding portion that surrounds the entire charging portion and a part of the lower side of the coated electric circuit portion around an axis along the direction of gravity, and at least the charging portion is separated from the charging portion. A water receiving part having a surrounding part surrounded by a vertical position and a fitting opening that fits into a predetermined part of the charging part, and when attached to the charging part so that the predetermined part of the charging part fits into the fitting opening, the water is concerned. It is equipped with a water receiving part that closes the surrounding space above the receiving part and receives water flowing in the surrounding space.

そして、囲繞部は、上方側の開口の内径が、被覆電路部の外径と略同じ大きさに形成され、水受部には、嵌合開口に充電部の所定部位が嵌るように充電部に取り付けられているときに、碍子部に下方から上方に向かって重力方向に平行な平行光線を当てて当該水受部に碍子部の影を投影した場合、碍子部の影の外側に形成される孔部であって、水を通すことができる孔部が形成されている。 The insulator portion is formed so that the inner diameter of the opening on the upper side is substantially the same as the outer diameter of the coated electric circuit portion, and the water receiving portion is a charging portion so that a predetermined portion of the charging portion fits into the fitting opening. When the shadow of the insulator is projected on the water receiving part by shining a parallel light beam parallel to the direction of gravity from the bottom to the top of the insulator, it is formed outside the shadow of the insulator. A hole through which water can pass is formed.

本発明のブッシングカバーは、囲繞空間を通る水を水受部が受ける。そして、その水受部に、水が通る孔部が設けられ、その孔部は、碍子部を水受部上に投影した影の外側に形成されている。そのため、囲繞空間内に塩水が侵入しても、その塩水は、水受部で受け止められた後、孔部から下方に落ち、しかも碍子部に当たることもない。したがって、本発明のブッシングカバーは、囲繞空間内に侵入した塩水が、充電部から碍子部の外縁に至る塩水路を形成することを抑止できる。 In the bushing cover of the present invention, the water receiving portion receives water passing through the surrounding space. Then, a hole through which water passes is provided in the water receiving portion, and the hole is formed outside the shadow of the insulator portion projected onto the water receiving portion. Therefore, even if salt water invades the surrounding space, the salt water is received by the water receiving portion and then falls downward from the hole portion and does not hit the insulator portion. Therefore, the bushing cover of the present invention can prevent salt water that has entered the surrounding space from forming a salt water channel from the charging portion to the outer edge of the insulator portion.

したがって、本発明のブッシングカバーを用いると、ブッシングカバー内に塩水が侵入しても、充電部から雪を介して土台部に漏電する地絡が発生する確率を低く抑えることができる。
（２）本発明のブッシングカバーを構成する囲繞部は、碍子部の少なくとも上方側の一部をも囲うものであってもよい。その場合、囲繞部は、碍子部について、碍子部から離れた位置で囲うようにしてもよい。 Therefore, when the bushing cover of the present invention is used, even if salt water invades the bushing cover, the probability that a ground fault that leaks from the charging portion to the base portion via snow can be suppressed to a low level can be suppressed.
(2) The surrounding portion constituting the bushing cover of the present invention may also surround at least a part of the upper side of the insulator portion. In that case, the insulator portion may surround the insulator portion at a position away from the insulator portion.

本発明のブッシングカバーは、土台部上に設置された碍子部の上方側の一部を囲繞部が覆っているので、土台部上に雪が積もっても、その雪が、碍子部のうち、塩水路が形成されやすい上方側の一部まで達する確率は低くなる。
したがって、本発明のブッシングカバーを用いると、ブッシングカバー内に塩水が侵入しても、充電部から雪を介して土台部に漏電する地絡が発生する確率を低く抑えることができる。 In the bushing cover of the present invention, since the surrounding portion covers a part of the upper side of the insulator portion installed on the base portion, even if snow is accumulated on the base portion, the snow will be collected in the salt water channel of the insulator portion. The probability of reaching a part of the upper side where the insulator is likely to be formed is low.
Therefore, when the bushing cover of the present invention is used, even if salt water invades the bushing cover, the probability that a ground fault that leaks from the charging portion to the base portion via snow can be suppressed to a low level can be suppressed.

（３）本発明のブッシングカバーを構成する囲繞部は、碍子部の少なくとも上方側の一部、及び、充電部の下方側の一部である下方部分を覆う下方覆部と、下方覆部と組み合わせ可能な上方覆部であって、充電部の下方部分よりも上方側の上方部分、及び、被覆電路部の下方側の一部を覆う上方覆部とを備えていてもよい。 (3) The surrounding portion constituting the bushing cover of the present invention includes a lower covering portion that covers at least a part of the upper side of the insulator portion and a lower portion that is a part of the lower side of the charging portion, and a lower covering portion. The upper covering portion that can be combined may be provided with an upper portion on the upper side of the lower portion of the charging portion and an upper covering portion that covers a part on the lower side of the covered electric circuit portion.

充電部は、碍子部側と、被覆電路部側とに分離可能に構成されていることが多い。この場合、本発明のように囲繞部を上下に別れるように形成すれば、碍子部側の充電部に下方覆部を被せ、被覆電路部側の充電部に上方覆部を被せ、分離された充電部をつないで、上方覆部と下方覆部とを組み合わせるだけの簡単な作業で、本発明のブッシングカバーを電線路に設置することができる。 The charging portion is often configured to be separable between the insulator portion side and the covered electric circuit portion side. In this case, if the surrounding portion is formed so as to be separated into upper and lower parts as in the present invention, the charging portion on the insulator portion side is covered with the lower covering portion, and the charging portion on the covered electric circuit portion side is covered with the upper covering portion and separated. The bushing cover of the present invention can be installed on an electric line by a simple operation of connecting a charging unit and combining an upper cover portion and a lower cover portion.

（４）本発明のブッシングカバーは、下方覆部が、水受部を備え、上方覆部が、当該上方覆部の内壁面上を伝う水を、水受部上に導く導水部を備えるようにしてもよい。
このようにすると、当該上方覆部の内壁面上を伝う塩水は、導水部によって水受部に導かれるので、当該上方覆部の内壁面上を伝う塩水が、水受部に形成された孔部以外の場所から外部に漏れ出ることを抑止できる。 (4) In the bushing cover of the present invention, the lower covering portion is provided with a water receiving portion, and the upper covering portion is provided with a water guiding portion for guiding water traveling on the inner wall surface of the upper covering portion onto the water receiving portion. You may do it.
In this way, the salt water traveling on the inner wall surface of the upper covering portion is guided to the water receiving portion by the water guiding portion, so that the salt water traveling on the inner wall surface of the upper covering portion is formed in the water receiving portion. It is possible to prevent leakage to the outside from a place other than the part.

（５）本発明のブッシングカバーを構成する上方覆部には、下方覆部に組み合わされたとき、下方覆部の上方側の一部を覆うスカート部が形成されていてもよい。このようにすると、雪は、スカート部と下方覆部との間に入り込まなければ、囲繞部の外側から上方覆部と下方覆部との組み合わせ部分に近づけなくなる。そのため、塩を含む雪が溶けた塩水が、上方覆部と下方覆部との組み合わせ部分を介して囲繞部の外部空間から囲繞空間内に侵入しにくくなる。そのため、本発明のブッシングカバーを用いると、囲繞空間内に侵入する塩水が少なくなるので、塩水路が碍子部上に形成される確率を低く抑えることができる。 (5) The upper covering portion constituting the bushing cover of the present invention may be formed with a skirt portion that covers a part of the upper side of the lower covering portion when combined with the lower covering portion. In this way, the snow cannot approach the combination portion of the upper cover portion and the lower cover portion from the outside of the surrounding portion unless it enters between the skirt portion and the lower cover portion. Therefore, it becomes difficult for salt water containing salt and melted snow to enter the surrounding space from the external space of the surrounding portion through the combination portion of the upper covering portion and the lower covering portion. Therefore, when the bushing cover of the present invention is used, the amount of salt water that invades the surrounding space is reduced, so that the probability that a salt water channel is formed on the insulator portion can be suppressed to a low level.

（６）本発明のブッシングカバーを構成する水受部には、嵌合開口に充電部の所定部位が嵌るように充電部に取り付けられているときに嵌合開口の側から孔部に向かって下る傾斜が形成されていてもよい。このようにすると、ブッシングカバー内に塩水が侵入した場合に、その塩水が孔部に集まりやすくなるため、孔部以外の場所、特に嵌合開口から塩水が外部に出て、その塩水が碍子部上で塩水路を形成することを抑制できる。 (6) The water receiving portion constituting the bushing cover of the present invention is attached to the charging portion so that a predetermined portion of the charging portion fits into the fitting opening from the side of the fitting opening toward the hole. A downward slope may be formed. In this way, when salt water enters the bushing cover, the salt water tends to collect in the hole, so that the salt water comes out from a place other than the hole, especially from the fitting opening, and the salt water is the insulator part. It is possible to suppress the formation of salt water channels above.

（７）本発明のブッシングカバーを構成する水受部は、囲繞部が電線路から離れた位置で電線路を覆うため、碍子部及び充電部と囲繞部との間隔を保持するスペーサであってもよい。このように、水受部がスペーサであれば、他にスペーサを備えなくてもよいので、ブッシングカバーの部品点数を少なくすることができる。 (7) The water receiving portion constituting the bushing cover of the present invention is a spacer for maintaining the distance between the insulator portion and the charging portion and the surrounding portion in order to cover the electric line at a position where the surrounding portion is away from the electric line. It is also good. As described above, if the water receiving portion is a spacer, it is not necessary to provide another spacer, so that the number of parts of the bushing cover can be reduced.

（８）本発明のブッシングカバーの構成する水受部は、当該水受部の下方側の面に形成された突出部であって、孔部より囲繞部側の孔部の近傍に設けられ、下方に向かって突出した突出部を備えるようにしてもよい。このようにすると、孔部から外部に出た水は、その表面張力によって突出部、すなわち、碍子部から離れる方向に導かれ、下方に落ちる。そのため、本発明のブッシングカバーを用いると、孔部から直接塩水が落ちる場合よりも、碍子部から離れた位置で塩水を落とすことができるので、塩水路が碍子部上に形成される確率を低く抑えることができる。 (8) The water receiving portion constituting the bushing cover of the present invention is a protruding portion formed on the lower surface of the water receiving portion, and is provided in the vicinity of the hole portion on the surrounding portion side from the hole portion. It may be provided with a protrusion protruding downward. In this way, the water discharged from the hole to the outside is guided away from the protrusion, that is, the insulator by the surface tension, and falls downward. Therefore, when the bushing cover of the present invention is used, the salt water can be dropped at a position away from the insulator portion as compared with the case where the salt water falls directly from the hole portion, so that the probability that the salt water channel is formed on the insulator portion is low. It can be suppressed.

実施形態のブッシングカバーの説明図であり、（ａ）は、ブッシングカバーの斜視図、（ｂ）はブッシングカバーの正面図、（ｃ）は、ブッシングカバーの中心軸を通る断面で切断した断面図である。It is explanatory drawing of the bushing cover of an embodiment, (a) is a perspective view of a bushing cover, (b) is a front view of a bushing cover, (c) is a sectional view cut by a cross section passing through a central axis of a bushing cover. Is. 実施形態のブッシングカバーを構成する上方覆部の説明図であり、（ａ）は、上方覆部の斜視図、（ｂ）は、上方覆部の中心軸を通る断面で切断した断面図である。It is explanatory drawing of the upper covering part constituting the bushing cover of embodiment, (a) is the perspective view of the upper covering part, (b) is the sectional view cut in the cross section passing through the central axis of the upper covering part. .. 実施形態のブッシングカバーを構成する下方覆部の説明図であり、（ａ）は、下方覆部の斜視図、（ｂ）は、下方覆部の中心軸を通る断面で切断した断面図である。It is explanatory drawing of the lower cover part constituting the bushing cover of embodiment, (a) is the perspective view of the lower cover part, (b) is the sectional view cut in the cross section passing through the central axis of the lower cover part. .. 図３（ｂ）の一部拡大図であり、図３（ｂ）中の符号αで示した部分の一部拡大図である。It is a partially enlarged view of FIG. 3 (b), and is a partially enlarged view of the part indicated by reference numeral α in FIG. 3 (b). 実施形態のブッシングカバーを電線路に取り付けた様子を示す説明図であり、ブッシングカバーについては、ブッシングカバーの中心軸を通る断面で切断した断面図で示している説明図である。It is explanatory drawing which shows the state which the bushing cover of embodiment was attached to the electric line, and is the explanatory view which shows the bushing cover by the cross-sectional view cut in the cross section which passes through the central axis of the bushing cover. 従来のブッシングカバーの説明図であり、ブッシングカバーについては、ブッシングカバーの中心軸を通る断面で切断した断面図で示している説明図である。It is explanatory drawing of the conventional bushing cover, and it is explanatory drawing which shows the bushing cover by the cross-sectional view cut in the cross section which passes through the central axis of a bushing cover.

以下に本発明の例示的な実施形態について図面を参照しながら説明する。
本実施形態のブッシングカバー１について、図１～図５を用いて説明する。本実施形態のブッシングカバー１は、図５に示すように、ＳＶＲ（自動電圧調整器：ＳｔｅｐＶｏｌｔａｇｅＲｅｇｕｌａｔｏｒ）４００の筐体の上面から重力方向に沿って上方に延びる電線路１００に取り付けられるものである。具体的には、ブッシングカバー１は、電線路１００のうち、ＳＶＲ４００の筐体の上面上に設置される碍子部１１０や、碍子部１１０上に形成される充電部１４０を覆うように電線路に取り付けられる。 Hereinafter, exemplary embodiments of the present invention will be described with reference to the drawings.
The bushing cover 1 of the present embodiment will be described with reference to FIGS. 1 to 5. As shown in FIG. 5, the bushing cover 1 of the present embodiment is attached to an electric line 100 extending upward along the direction of gravity from the upper surface of the housing of the SVR (automatic voltage regulator: Step Voltage Regulator) 400. be. Specifically, the bushing cover 1 is attached to the electric line so as to cover the insulator portion 110 installed on the upper surface of the housing of the SVR 400 and the charging portion 140 formed on the insulator portion 110 of the electric line 100. It is attached.

以下ではまず、ブッシングカバー１が用いられる前提となる電線路１００について説明し、その後、ブッシングカバー１について説明する。なお、電線路１００について背景技術の欄で説明した構成については、同一符号を付けて説明する。
碍子部１１０には、ベース具１２０、３つの碍子１３０が含まれる。
ベース具１２０は、円盤形状に形成された金属製のベース金具１２１と、ベース金具１２１よりも径が小さい円柱形状に形成された陶器製の柱状支持具１２２とを備えている。ベース金具１２１及び柱状支持具１２２は、中心軸が一致するように配置されるとともに、ベース金具１２１の中心軸に垂直な２つの盤面のうち、一方の盤面上から柱状支持具１２２が突出するように、接合されている。ベース具１２０は、柱状支持具１２２が設けられていない側の盤面が、ＳＶＲ４００の筐体の上面４０１に面接触するように設置される。このようにベース具１２０がＳＶＲ４００の筐体の上面４０１に設置されると、柱状支持具１２２は、ＳＶＲ４００の筐体の上面４０１に対して上方に向かって起立した状態となる。 In the following, first, the electric line 100 on which the bushing cover 1 is used will be described, and then the bushing cover 1 will be described. The configuration of the electric line 100 described in the column of background technology will be described with the same reference numerals.
The insulator portion 110 includes a base tool 120 and three insulators 130.
The base tool 120 includes a metal base metal fitting 121 formed in a disk shape and a ceramic columnar support 122 formed in a cylindrical shape having a diameter smaller than that of the base metal fitting 121. The base metal fitting 121 and the columnar support 122 are arranged so that the central axes coincide with each other, and the columnar support 122 protrudes from one of the two board surfaces perpendicular to the central axis of the base metal fitting 121. It is joined to. The base tool 120 is installed so that the board surface on the side where the columnar support member 122 is not provided comes into surface contact with the upper surface 401 of the housing of the SVR 400. When the base tool 120 is installed on the upper surface 401 of the housing of the SVR 400 in this way, the columnar support 122 is in a state of standing upward with respect to the upper surface 401 of the housing of the SVR 400.

３つの碍子１３０は、いずれも同一形状の碍子である。円盤形状に形成された傘部１３１と、傘部１３１よりも径が小さい円柱形状に形成された突状部１３２とを備えている。傘部１３１及び突状部１３２は、中心軸が一致するように配置されるとともに、傘部１３１の中心軸に垂直な２つの盤面のうち、一方の盤面上から突状部１３２が突出するように一体に形成されている。各碍子１３０は、傘部１３１が下方側、突状部１３２が上方側に位置し、ベース具１２０及び各碍子１３０の中心軸が一致するように、柱状支持具１２２上に積み重ねられる。 All three insulators 130 are insulators having the same shape. It includes an umbrella portion 131 formed in a disk shape and a protruding portion 132 formed in a cylindrical shape having a diameter smaller than that of the umbrella portion 131. The umbrella portion 131 and the protruding portion 132 are arranged so that the central axes coincide with each other, and the protruding portion 132 protrudes from one of the two board surfaces perpendicular to the central axis of the umbrella portion 131. It is formed integrally with. Each insulator 130 is stacked on a columnar support 122 so that the umbrella portion 131 is located on the lower side and the protruding portion 132 is located on the upper side, and the central axes of the base tool 120 and each insulator 130 coincide with each other.

充電部１４０は、碍子側金具１５０、電線側接続用金具１７０が含まれる。碍子側金具１５０、電線側接続用金具１７０は、金属で構成されており、電路に電気がながれると、外気に対して絶縁されていない状態となるので、碍子側金具１５０、電線側接続用金具１７０が含まれる部分を「充電部」と呼んでいる。 The charging unit 140 includes an insulator side metal fitting 150 and an electric wire side connection metal fitting 170. The insulator side metal fittings 150 and the electric wire side connection metal fittings 170 are made of metal, and when electricity flows through the electric wire, the insulator side metal fittings 150 and the electric wire side connection metal fittings are not insulated from the outside air. The part including 170 is called a "charging part".

碍子側金具１５０は、下部碍子側金具１５１、中間金具１６０、ブッシング金具１５２とを備えている。
下部碍子側金具１５１は、円盤形状に形成されている。下部碍子側金具１５１は、碍子１３０の傘部１３１よりも肉厚であるが、径が小さい円盤形状に形成されている。また、下部碍子側金具１５１は、その中心軸に垂直な２つの面のうち一方の面の縁部が削がれたような形状に形成されている。下部碍子側金具１５１は、縁部が削がれた側の面が下方を向くように、最も上方側に積まれた碍子１３０上に積み重ねられる。また、下部碍子側金具１５１は、その中心軸と、碍子部１１０の中心軸（ベース具１２０及び３つの碍子１３０の中心軸）とが一致するように、最も上方側に積まれた碍子１３０上に積み重ねられる。 The insulator side metal fitting 150 includes a lower insulator side metal fitting 151, an intermediate metal fitting 160, and a bushing metal fitting 152.
The lower insulator side metal fitting 151 is formed in a disk shape. The lower insulator side metal fitting 151 is thicker than the umbrella portion 131 of the insulator 130, but is formed in a disk shape having a smaller diameter. Further, the lower insulator side metal fitting 151 is formed in a shape in which the edge portion of one of the two surfaces perpendicular to the central axis thereof is cut off. The lower insulator side metal fittings 151 are stacked on the insulator 130 stacked on the uppermost side so that the surface on the side where the edge is scraped faces downward. Further, the lower insulator side metal fitting 151 is on the insulator 130 stacked on the uppermost side so that the central axis thereof and the central axis of the insulator portion 110 (the central axes of the base tool 120 and the three insulators 130) coincide with each other. Stacked in.

中間金具１６０は、下部碍子側金具１５１と同一径の円盤形状に形成された下方側中間金具部１６１と、下方側中間金具部１６１よりも径が小さい円柱形状に形成された上方側中間金具部１６２とからなる。下方側中間金具部１６１及び上方側中間金具部１６２は、それぞれの中心軸が一致するように配置されるとともに、下方側中間金具部１６１の中心軸に垂直な２つの盤面のうち、一方の盤面上から上方側中間金具部１６２が突出するように、一体に形成されている。 The intermediate metal fitting 160 has a lower intermediate metal fitting portion 161 formed in a disk shape having the same diameter as the lower insulator side metal fitting 151 and an upper intermediate metal fitting portion formed in a cylindrical shape having a diameter smaller than that of the lower intermediate metal fitting portion 161. It consists of 162. The lower intermediate metal fittings portion 161 and the upper intermediate metal fittings portion 162 are arranged so that their central axes coincide with each other, and one of the two board surfaces perpendicular to the central axis of the lower intermediate metal fittings portion 161. The intermediate metal fitting portion 162 on the upper side is integrally formed so as to project from above.

中間金具１６０は、下方側中間金具部１６１のうち、上方側中間金具部１６２が設けられていない側の盤面が、下部碍子側金具１５１の上面に面接触し、中間金具１６０の中心軸と下部碍子側金具１５１の中心軸とが一致するように、下部碍子側金具１５１に重ねられる。そして、下方側中間金具部１６１と下部碍子側金具１５１とはボルトで固定される。このように中間金具１６０が下部碍子側金具１５１に固定されると、上方側中間金具部１６２が、上方に向かって突出した状態となる。 In the intermediate metal fitting 160, the board surface of the lower intermediate metal fitting portion 161 on the side where the upper intermediate metal fitting portion 162 is not provided comes into surface contact with the upper surface of the lower insulator side metal fitting 151, and the central axis and the lower portion of the intermediate metal fitting 160 are formed. It is overlapped with the lower insulator side metal fitting 151 so as to coincide with the central axis of the insulator side metal fitting 151. Then, the lower intermediate metal fitting portion 161 and the lower insulator side metal fitting 151 are fixed with bolts. When the intermediate metal fitting 160 is fixed to the lower insulator side metal fitting 151 in this way, the upper intermediate metal fitting portion 162 is in a state of protruding upward.

ブッシング金具１５２は、長方形状に形成された金具である。ブッシング金具１５２は、その長手方向が、上方側中間金具部１６２の中心軸に沿い、かつ、短手方向（幅方向）の中間位置が、上方側中間金具部１６２の中心軸上に位置するように、上方側中間金具部１６２から上方に向かって立設されている。ブッシング金具１５２は、上方側中間金具部１６２に固定されている。 The bushing metal fitting 152 is a metal fitting formed in a rectangular shape. The bushing metal fitting 152 has its longitudinal direction along the central axis of the upper intermediate metal fitting portion 162, and the intermediate position in the lateral direction (width direction) is located on the central axis of the upper intermediate metal fitting portion 162. It is erected upward from the upper intermediate metal fitting portion 162. The bushing metal fitting 152 is fixed to the upper intermediate metal fitting portion 162.

電線側接続用金具１７０は、被覆された配電線２００の先端部分の被覆を剥いて裸電線にされた部分の先端に取り付けられる受け金具１７１と、裸電線に被せられたスリーブ１７２とを備えている。
受け金具１７１は、ブッシング金具１５２同様、長方形状に形成されている。受け金具１７１は、その幅方向の中心を通り、長手方向に沿った図示しない軸が、配電線２００の中心軸と一致するように、配電線２００の先端に取り付けられている。この受け金具１７１は、図示しないアンカー部が配電線２００の被覆を剥いた部分に埋設されている。 The electric wire side connection metal fitting 170 includes a receiving metal fitting 171 attached to the tip of a portion made into a bare electric wire by stripping the coating of the end portion of the covered distribution line 200, and a sleeve 172 covered with the bare electric wire. There is.
The receiving metal fitting 171 is formed in a rectangular shape like the bushing metal fitting 152. The receiving metal fitting 171 passes through the center in the width direction thereof, and is attached to the tip of the distribution line 200 so that an axis (not shown) along the longitudinal direction coincides with the central axis of the distribution line 200. The receiving metal fitting 171 has an anchor portion (not shown) embedded in a portion where the coating of the distribution line 200 is stripped.

スリーブ１７２は、配電線２００の被覆を剥いた裸電線を挿入することができる円筒形状に形成された金具である。
配電線２００は、先端部分の被覆が剥かれた後、スリーブ１７２が裸電線部分に取り付けられ、受け金具１７１のアンカー部分が裸電線に挿入された後、スリーブ１７２がかしめられる。すると、受け金具１７１が配電線２００の先端に固定される。 The sleeve 172 is a metal fitting formed in a cylindrical shape into which a bare electric wire having a stripped coating on the distribution electric wire 200 can be inserted.
In the distribution line 200, after the coating on the tip portion is stripped, the sleeve 172 is attached to the bare wire portion, and the anchor portion of the receiving metal fitting 171 is inserted into the bare wire, and then the sleeve 172 is crimped. Then, the receiving metal fitting 171 is fixed to the tip of the distribution line 200.

最後に、被覆電路部１８０について簡単に説明する。
被覆電路部１８０は、配電線２００のうち、被覆が剥かれずに充電部１４０から上方に向かって延びている部分を指す。
次に、本実施形態のブッシングカバー１について説明する。
本実施形態のブッシングカバー１は、図１に示すように、円錐形状に形成され、尖頭部位９０が重力方向の上方を向き、底部部位９１が重力方向の下方を向き、中心軸７の軸方向が重力方向に沿うように、電線路１００（図５参照）に取り付けられる。以下では、本実施形態のブッシングカバー１の形状等を説明する場合、円錐形状の尖頭部位９０側を上方側、底部部位９１側を下方側と呼んで説明する。 Finally, the coated electric circuit portion 180 will be briefly described.
The covered electric line portion 180 refers to a portion of the distribution line 200 that extends upward from the charging portion 140 without being stripped of the coating.
Next, the bushing cover 1 of the present embodiment will be described.
As shown in FIG. 1, the bushing cover 1 of the present embodiment is formed in a conical shape, with the pointed portion 90 facing upward in the direction of gravity, the bottom portion 91 facing downward in the direction of gravity, and the axis of the central axis 7. It is attached to the electric line 100 (see FIG. 5) so that the direction is along the direction of gravity. Hereinafter, when the shape and the like of the bushing cover 1 of the present embodiment will be described, the cone-shaped pointed portion 90 side will be referred to as an upper side, and the bottom portion 91 side will be referred to as a lower side.

本実施形態のブッシングカバー１は、重力方向に沿って上下に並んだ２つの覆部で構成されており、上方側の覆部を上方覆部３、下方側の覆部を下方覆部５と呼ぶ。
上方覆部３は、図２に示すように、全体に上方側から下方側に向かって拡径する円錐形状に形成された本体部３０を備える。ただし、上方覆部３の本体部３０は、拡径する割合（上方側の径に対して下方側の径が大きくなる割合、以下、拡径率という）が異なる４つの部分からなる。最も上方側の部分を第１部分３１、第１部分３１に連続する下方側の部分を第２部分３２、第２部分３２に連続する下方側の部分を第３部分３３、第３部分３３に連続する下方側の部分を第４部分３４とよぶ。 The bushing cover 1 of the present embodiment is composed of two covering portions arranged vertically along the direction of gravity. The upper covering portion is the upper covering portion 3 and the lower covering portion is the lower covering portion 5. Call.
As shown in FIG. 2, the upper covering portion 3 includes a main body portion 30 formed in a conical shape whose diameter increases from the upper side to the lower side as a whole. However, the main body portion 30 of the upper covering portion 3 is composed of four portions having different diameter expansion ratios (a ratio in which the lower diameter is larger than the upper diameter, hereinafter referred to as a diameter expansion ratio). The uppermost part is the first part 31, the lower part continuous with the first part 31 is the second part 32, and the lower part continuous with the second part 32 is the third part 33 and the third part 33. The continuous lower part is called the fourth part 34.

上方覆部３の拡径率は、第２部分３２が最も大きく、第４部分３４、第１部分３１、第３部分３３の順に小さく、また、中心軸７に沿った長さは、第３部分３３が最も長く、第４部分３４、第１部分３１、第２部分３２の順に短い。第３部分３３及び第４部分３４は、充電部１４０から所定距離離れた位置で、充電部１４０を覆う径で形成されている（図５参照）。 The diameter expansion ratio of the upper covering portion 3 is largest in the second portion 32, smaller in the order of the fourth portion 34, the first portion 31, and the third portion 33, and the length along the central axis 7 is the third. The portion 33 is the longest, and the fourth portion 34, the first portion 31, and the second portion 32 are shorter in this order. The third portion 33 and the fourth portion 34 are formed at positions separated from the charging portion 140 by a predetermined distance and have a diameter covering the charging portion 140 (see FIG. 5).

本体部３０の第４部分３４の内側には、中心軸７に沿った長手方向の中間位置よりやや下方位置から、中心軸７に沿って下方に向かって突出した突出部３５が形成されている（図２（ｂ））。この突出部３５は、中心軸７に平行に配置された棒を中心軸７周りに回した回転体のような形状に形成されており、上方覆部３が下方覆部５と組み合わされるとき、突出部３５の下方側の端部が、下方覆部５の上方側の開口を閉じる後述する水受部５１に接し、下方覆部５に形成された後述する突起部５５が、突出部３５と本体部３０の第４部分３４との間に形成される空間に入って組み合わされる（図１（ｃ）参照）。 Inside the fourth portion 34 of the main body portion 30, a protruding portion 35 is formed that protrudes downward along the central axis 7 from a position slightly below the intermediate position in the longitudinal direction along the central axis 7. (FIG. 2 (b)). The protruding portion 35 is formed in a shape like a rotating body in which a rod arranged parallel to the central axis 7 is rotated around the central axis 7, and when the upper covering portion 3 is combined with the lower covering portion 5, when the upper covering portion 3 is combined with the lower covering portion 5. The lower end of the protrusion 35 is in contact with the water receiving portion 51, which will be described later, which closes the opening on the upper side of the lower cover 5, and the protrusion 55, which will be described later, formed on the lower cover 5 is the protrusion 35. It enters and is combined in the space formed between the fourth portion 34 of the main body portion 30 (see FIG. 1 (c)).

また、第４部分３４の本体部３０は、中心軸７に沿った位置であって、突出部３５の下方側の先端の位置よりも下方側の部分が、下方覆部５の上方側の一部を覆う大きさに形成されている。本体部３０のうち、下方覆部５の上方側の一部を覆う部分を、スカート部３６と呼ぶ。 Further, the main body portion 30 of the fourth portion 34 is located along the central axis 7, and the portion below the position of the tip on the lower side of the protruding portion 35 is one on the upper side of the lower covering portion 5. It is formed in a size that covers the part. The portion of the main body portion 30 that covers a part of the lower covering portion 5 on the upper side is referred to as a skirt portion 36.

さらに、上方覆部３の本体部３０は、上端と下端が開口しているが、このうち、第１部分３１の上方側の開口３７は、配電線２００の被覆された部分の外径と略同じ大きさの内径の大きさの開口である（図５参照）。
下方覆部５は、図３に示すように、全体に上方側から下方側に向かってやや拡径した筒形形状に形成された本体部５０を備えている。下方覆部５は、下方側は開口しているが、上方側は水受部５１によって閉じられている。また、下方覆部５は、水受部５１の縁部から上方に向かって突出した突起部５５を備えている。 Further, the upper end and the lower end of the main body 30 of the upper covering portion 3 are open, and the opening 37 on the upper side of the first portion 31 is abbreviated as the outer diameter of the covered portion of the distribution line 200. It is an opening with the same inner diameter (see FIG. 5).
As shown in FIG. 3, the lower covering portion 5 includes a main body portion 50 formed in a tubular shape having a diameter slightly increased from the upper side to the lower side as a whole. The lower cover portion 5 is open on the lower side, but is closed on the upper side by the water receiving portion 51. Further, the lower covering portion 5 includes a protruding portion 55 protruding upward from the edge portion of the water receiving portion 51.

水受部５１は、円盤形状に形成され、下方覆部５の上方側の開口を閉じる。水受部５１の中央には、下方覆部５の中心軸７上に中心を有する円形状に形成された開口であって、上方側中間金具部１６２（図５参照）に嵌合可能な嵌合開口５２が形成されている。嵌合開口５２には、水受部５１の上面のうち、嵌合開口５２の縁部から上方に向かって突出するフランジ部５３が形成されている。フランジ部５３は、中心軸７に平行に配置された棒を中心軸７周りに回した回転体のような形状に形成されている。フランジ部５３は、嵌合開口５２に上方側中間金具部１６２が嵌合されるとき、中心軸７側の面が、上方側中間金具部１６２の側面（中心軸７に沿った面であって、中心軸７周りに形成されている面）に水密に接する。 The water receiving portion 51 is formed in a disk shape and closes the opening on the upper side of the lower covering portion 5. At the center of the water receiving portion 51, there is an opening formed in a circular shape having a center on the central axis 7 of the lower covering portion 5, and is fitted into the upper intermediate metal fitting portion 162 (see FIG. 5). A joint opening 52 is formed. The fitting opening 52 is formed with a flange portion 53 that protrudes upward from the edge portion of the fitting opening 52 on the upper surface of the water receiving portion 51. The flange portion 53 is formed in a shape like a rotating body in which a rod arranged parallel to the central axis 7 is rotated around the central axis 7. In the flange portion 53, when the upper intermediate metal fitting portion 162 is fitted into the fitting opening 52, the surface on the central axis 7 side is the side surface of the upper intermediate metal fitting portion 162 (the surface along the central axis 7). , A surface formed around the central axis 7) is in close contact with water.

また、水受部５１は、下方覆部５の中心軸７周りに等間隔に設けられた複数の孔部５４を備えている。これら孔部５４は、嵌合開口５２が上方側中間金具部１６２（図５参照）に嵌るように下方覆部５が充電部１４０に取り付けられたときに、碍子１３０（特に最も上方側に配置された碍子１３０）に下方から上方に向かって重力方向に平行な平行光線を当てて水受部５１に碍子１３０の影を投影した場合、碍子１３０の影の外側に形成される。これら孔部５４は、水を通すことができる大きさに形成されている。 Further, the water receiving portion 51 includes a plurality of holes 54 provided at equal intervals around the central axis 7 of the lower covering portion 5. These holes 54 are arranged in the insulator 130 (particularly on the uppermost side) when the lower covering portion 5 is attached to the charging portion 140 so that the fitting opening 52 fits in the upper intermediate metal fitting portion 162 (see FIG. 5). When the shadow of the insulator 130 is projected onto the water receiving portion 51 by irradiating the insulator 130) with parallel light rays parallel to the direction of gravity from the lower side to the upper side, the insulator 130 is formed outside the shadow of the insulator 130. These holes 54 are formed in a size that allows water to pass through.

また、水受部５１には、水受部５１の下方側の面に複数の突出部５６が形成されている。これら突出部５６は、各孔部５４より本体部５０側の孔部５４の近傍に設けられ、下方に向かって突出している。
水受部５１は、図４に示すように、嵌合開口５２に上方側中間金具部１６２が嵌められたときに嵌合開口５２側から各孔部５４側に向かって下る傾斜（傾斜角βで傾斜を示している）が形成されている。以下、この傾斜した部分を傾斜部５７と呼ぶ。 Further, the water receiving portion 51 is formed with a plurality of protruding portions 56 on the lower surface of the water receiving portion 51. These protruding portions 56 are provided in the vicinity of the hole portion 54 on the main body portion 50 side of each hole portion 54, and project downward.
As shown in FIG. 4, the water receiving portion 51 is inclined (inclined angle β) downward from the fitting opening 52 side toward each hole portion 54 when the upper intermediate metal fitting portion 162 is fitted in the fitting opening 52. (Indicating the slope) is formed. Hereinafter, this inclined portion is referred to as an inclined portion 57.

次に、上記のように構成されたブッシングカバー１を、電線路１００に取り付ける手順について、図５を用いて説明する。
１）最初に、下方覆部５を中間金具１６０に取り付ける。具体的には、嵌合開口５２に上方側中間金具部１６２を嵌め、水受部５１が、下方側中間金具部１６１上に乗るように下方覆部５を中間金具１６０に取り付ける。 Next, a procedure for attaching the bushing cover 1 configured as described above to the electric line 100 will be described with reference to FIG.
1) First, the lower cover portion 5 is attached to the intermediate metal fitting 160. Specifically, the upper intermediate metal fitting portion 162 is fitted into the fitting opening 52, and the lower covering portion 5 is attached to the intermediate metal fitting 160 so that the water receiving portion 51 rides on the lower intermediate metal fitting portion 161.

２）次に、上方覆部３を配電線２００に取り付ける。具体的には、上方側の開口３７に、配電線２００のうち被覆がされた部分を通す。
３）配電線２００の先端の被覆を剥いた裸電線部分にスリーブ１７２を差し込み、受け金具１７１の図示しないアンカー部を裸電線部分に差し込み、スリーブ１７２をかしめる。 2) Next, the upper covering portion 3 is attached to the distribution line 200. Specifically, the covered portion of the distribution line 200 is passed through the opening 37 on the upper side.
3) The sleeve 172 is inserted into the bare wire portion where the coating at the tip of the distribution line 200 is stripped, the anchor portion (not shown) of the receiving metal fitting 171 is inserted into the bare wire portion, and the sleeve 172 is crimped.

４）ブッシング金具１５２と受け金具１７１をネジ止めして、上方覆部３を下方覆部５に組み合わせる。
５）上方側の開口３７からブッシングカバー１内に水が浸入しないように、配電線２００のうち被覆された部分とブッシングカバー１とに絶縁テープを巻きつける。これによって上方覆部３は配電線２００に固定される。 4) The bushing metal fitting 152 and the receiving metal fitting 171 are screwed together, and the upper covering portion 3 is combined with the lower covering portion 5.
5) Wrap an insulating tape around the covered portion of the distribution line 200 and the bushing cover 1 so that water does not enter the bushing cover 1 from the opening 37 on the upper side. As a result, the upper covering portion 3 is fixed to the distribution line 200.

以上説明したように構成されたブッシングカバー１を電線路１００に取り付けると、以下のような作用効果がある。
ブッシングカバー１は、組み立てられると、水受部５１が、上方覆部３の本体部３０及び下方覆部５の本体部５０からなる囲繞部が囲う囲繞空間を上下に分離する。この水受部５１は、分離された囲繞空間のうち、上方側の囲繞空間を通る水を受ける。そして、その水受部５１は、水が通る孔部５４が設けられ、その孔部５４は、碍子１３０を水受部５１上に投影した影の外側に形成されている。そのため、水受部５１によって上下に分離された囲繞空間のうち上方側の空間（以下「上方側空間８」という）内に塩水が侵入しても、その塩水は、水受部５１で受け止められた後、孔部５４から下方に落ち、しかも碍子１３０に当たることもない。したがって、本実施形態のブッシングカバー１は、上方側空間８内に侵入した塩水が、充電部１４０から碍子１３０の外縁に至る塩水路を形成することを抑止できる。 When the bushing cover 1 configured as described above is attached to the electric line 100, the following functions and effects are obtained.
When the bushing cover 1 is assembled, the water receiving portion 51 vertically separates the surrounding space surrounded by the surrounding portion including the main body portion 30 of the upper covering portion 3 and the main body portion 50 of the lower covering portion 5. The water receiving portion 51 receives water passing through the surrounding space on the upper side of the separated surrounding space. The water receiving portion 51 is provided with a hole portion 54 through which water passes, and the hole portion 54 is formed outside the shadow of the insulator 130 projected onto the water receiving portion 51. Therefore, even if salt water invades the upper space (hereinafter referred to as "upper space 8") of the surrounding space separated vertically by the water receiving portion 51, the salt water is received by the water receiving portion 51. After that, it falls downward from the hole 54 and does not hit the insulator 130. Therefore, the bushing cover 1 of the present embodiment can prevent the salt water that has entered the upper space 8 from forming a salt water channel from the charging unit 140 to the outer edge of the insulator 130.

また、ブッシングカバー１は、ＳＶＲ４００の筐体の上面４０１上に設置された３つの碍子１３０のうち上方側の２つの碍子１３０を下方覆部５の本体部５０が覆っているので、ＳＶＲ４００の筐体の上面４０１上に雪が積もっても、その雪が、３つの碍子１３０のうち、塩水路が形成されやすい一番上の碍子１３０まで達する確率は低くなる。 Further, in the bushing cover 1, the main body 50 of the lower covering portion 5 covers the two insulators 130 on the upper side of the three insulators 130 installed on the upper surface 401 of the housing of the SVR 400, so that the housing of the SVR 400 is covered. Even if snow accumulates on the upper surface 401 of the body, the probability that the snow will reach the top insulator 130 in which a salt water channel is likely to be formed among the three insulators 130 is low.

したがって、ブッシングカバー１を用いると、ブッシングカバー１内に塩水が侵入しても、充電部１４０から雪を介してＳＶＲ４００の筐体に漏電する地絡が発生する確率を低く抑えることができる。
水受部５１には、嵌合開口５２の側から各孔部５４に向かって下る傾斜部５７が形成されている。そのため、ブッシングカバー１をブッシング部に取り付けると、上方側空間８内に塩水が侵入し、充電部１４０を伝う塩水があっても、その塩水が孔部５４に集まりやすくなるため、孔部５４以外の場所から塩水が外部に出て、その塩水が碍子１３０上で塩水路が形成されることを抑制できる。 Therefore, when the bushing cover 1 is used, even if salt water intrudes into the bushing cover 1, the probability that a ground fault that leaks from the charging unit 140 to the housing of the SVR 400 via snow can be suppressed to a low level can be suppressed.
The water receiving portion 51 is formed with an inclined portion 57 that descends from the side of the fitting opening 52 toward each hole portion 54. Therefore, when the bushing cover 1 is attached to the bushing portion, salt water invades into the upper space 8 and even if there is salt water transmitted through the charging portion 140, the salt water easily collects in the hole portion 54, so that the salt water easily collects in the hole portion 54 other than the hole portion 54. It is possible to prevent the salt water from coming out from the place of the above and forming a salt water channel on the basin 130.

水受部５１は、囲繞部（本体部３０及び本体部５０）が電線路から離れた位置で碍子１３０、充電部１４０を覆うため、碍子部１１０及び充電部１４０と囲繞部との間隔を保持するスペーサとしての機能も果たしている。このように、水受部５１がスペーサとしての機能もはたせば、他にスペーサを備えなくてもよいので、ブッシングカバー１の部品点数を少なくすることができる。 The water receiving portion 51 keeps the distance between the insulator portion 110 and the charging portion 140 and the surrounding portion in order to cover the insulator 130 and the charging portion 140 at a position where the surrounding portion (main body portion 30 and the main body portion 50) is away from the electric line. It also functions as a spacer. As described above, if the water receiving portion 51 also functions as a spacer, it is not necessary to provide another spacer, so that the number of parts of the bushing cover 1 can be reduced.

ブッシングカバー１は、下方側の充電部１４０（下部碍子側金具１５１、下方側中間金具部１６１）に下方覆部５を被せ、上方側の充電部１４０に上方覆部３を被せ、ブッシング金具１５２と受け金具１７１とをつなぎ、その後、上方覆部３と下方覆部５とを組み合わせるだけの簡単な作業で、ブッシングに設置することができる。 In the bushing cover 1, the lower charging portion 140 (lower insulator side metal fitting 151, lower intermediate metal fitting portion 161) is covered with the lower covering portion 5, and the upper charging portion 140 is covered with the upper covering portion 3, and the bushing metal fitting 152 is provided. It can be installed in the bushing by a simple operation of connecting the receiving metal fitting 171 and the receiving metal fitting 171 and then combining the upper covering portion 3 and the lower covering portion 5.

ブッシングカバー１は、水受部５１が、孔部５４の近傍に突出部５６を備えている。そのため、孔部５４から水受部５１の下面側に出た塩水は、その表面張力によって突出部５６、すなわち、碍子１３０から離れる方向に導かれ、下方に落ちる。そのため、このブッシングカバー１を用いると、孔部５４から直接塩水が落ちる場合よりも、碍子１３０から離れた位置で塩水を落とすことができるので、塩水路が碍子１３０上に形成される確率を低く抑えることができる。 In the bushing cover 1, the water receiving portion 51 is provided with a protruding portion 56 in the vicinity of the hole portion 54. Therefore, the salt water discharged from the hole 54 to the lower surface side of the water receiving portion 51 is guided in a direction away from the protruding portion 56, that is, the insulator 130 by the surface tension, and falls downward. Therefore, when the bushing cover 1 is used, the salt water can be dropped at a position away from the insulator 130 as compared with the case where the salt water falls directly from the hole 54, so that the probability that the salt water channel is formed on the insulator 130 is low. It can be suppressed.

ブッシングカバー１の上方覆部３には、下方覆部５に組み合わされたとき、下方覆部５の上方側の一部を覆うスカート部が形成されている。そのため、雪は、スカート部と下方覆部５の本体部５０との間に入り込まなければ、外側から上方覆部３の本体部３０と下方覆部５の本体部５０との組み合わせ部分に近づけなくなる。そのため、塩を含む雪が溶けた塩水が、上方覆部３の本体部３０と下方覆部５の本体部５０の組み合わせ部分を介して外部から上方側空間８内に侵入しにくくなる。そのため、ブッシングカバー１を用いると、上方側空間８内に侵入する塩水が少なくなるので、塩水路が碍子１３０上に形成される確率を低く抑えることができる。 The upper covering portion 3 of the bushing cover 1 is formed with a skirt portion that covers a part of the upper side of the lower covering portion 5 when combined with the lower covering portion 5. Therefore, unless the snow enters between the skirt portion and the main body portion 50 of the lower covering portion 5, the snow cannot approach the combination portion of the main body portion 30 of the upper covering portion 3 and the main body portion 50 of the lower covering portion 5 from the outside. .. Therefore, salt water containing salt and melted snow is less likely to enter the upper space 8 from the outside through the combination portion of the main body portion 30 of the upper covering portion 3 and the main body portion 50 of the lower covering portion 5. Therefore, when the bushing cover 1 is used, the amount of salt water that invades the upper space 8 is reduced, so that the probability that a salt water channel is formed on the insulator 130 can be suppressed to a low level.

下方覆部５が、水受部５１を備え、上方覆部３が、当該上方覆部３の内壁面上を伝う水を、孔部５４よりも下方覆部５の本体部５０側の水受部５１上に導く導水部となる突出部３５を備えている。そのため、上方覆部３の内壁面上を伝う塩水は、突出部３５によって水受部５１に導かれるので、上方覆部３の内壁面上を伝う塩水が、水受部５１に形成された孔部５４以外の場所から外部に漏れ出ることを抑止できる。 The lower covering portion 5 includes a water receiving portion 51, and the upper covering portion 3 receives water transmitted on the inner wall surface of the upper covering portion 3 on the main body 50 side of the lower covering portion 5 with respect to the hole portion 54. It is provided with a protruding portion 35 that serves as a water guiding portion that leads to the portion 51. Therefore, the salt water propagating on the inner wall surface of the upper covering portion 3 is guided to the water receiving portion 51 by the protruding portion 35, so that the salt water propagating on the inner wall surface of the upper covering portion 3 is formed in the water receiving portion 51. It is possible to prevent leakage to the outside from a place other than the unit 54.

［他の実施形態］
以上、実施形態について説明したが、特許請求の範囲に記載された発明は、上記実施形態に限定されることなく、種々の形態を採り得る。
（１）上記実施形態のブッシングカバー１として、円錐形上に形成された例を示したが、円筒形状に形成されていればよく、必ずしも円錐形上に形成されていなくてもよい。 [Other embodiments]
Although the embodiments have been described above, the inventions described in the claims can take various forms without being limited to the above embodiments.
(1) As the bushing cover 1 of the above embodiment, an example formed on a conical shape is shown, but it may be formed on a cylindrical shape and may not necessarily be formed on the conical shape.

（２）上記実施形態では、ＳＶＲの筐体上面に碍子部１１０が取り付けられる例について説明したが、碍子部１１０が取り付けられる対象は、ＳＶＲ以外の配電機器でもよいことはもちろん、配電又は送電用設備でもよく、鉄骨等であってもよい。 (2) In the above embodiment, an example in which the insulator portion 110 is attached to the upper surface of the housing of the SVR has been described, but the target to which the insulator portion 110 is attached may be a power distribution device other than the SVR, of course, for power distribution or power transmission. It may be equipment, steel frame, or the like.

（３）上記実施形態では、ブッシングカバー１が上方覆部３と下方覆部５とに分かれているが、上方覆部３と下方覆部５とは一体に形成されていてもよい。
（４）上記実施形態では、孔部５４が形成される位置を碍子１３０に塩水が当たらない位置としたが、碍子部１１０全体に塩水が当たらない位置としてもよい。
この場合、孔部５４は、嵌合開口５２が上方側中間金具部１６２（図５参照）に嵌るように下方覆部５が充電部１４０に取り付けられたときに、碍子１３０（特に最も上方側に配置された碍子１３０）だけでなく碍子部１１０全体に下方から上方に向かって重力方向に平行な平行光線を当てて水受部５１に碍子部１１０全体の影を投影した場合、碍子部１１０全体の影の外側に形成するとよい。
（５）本発明の各構成要素は概念的なものであり、上記実施形態に限定されない。例えば、１つの構成要素が有する機能を複数の構成要素に分散させたり、複数の構成要素が有する機能を１つの構成要素に統合したりしてもよい。また、上記実施形態の構成の少なくとも一部を、同様の機能を有する公知の構成に置き換えてもよい。また、上記実施形態の構成の少なくとも一部を、他の上記実施形態の構成に対して付加、置換等してもよい。 (3) In the above embodiment, the bushing cover 1 is divided into an upper cover portion 3 and a lower cover portion 5, but the upper cover portion 3 and the lower cover portion 5 may be integrally formed.
(4) In the above embodiment, the position where the hole 54 is formed is set to the position where the insulator 130 is not exposed to the salt water, but the position where the insulator portion 110 as a whole is not exposed to the salt water may be set.
In this case, the hole 54 is the insulator 130 (particularly the uppermost side) when the lower covering portion 5 is attached to the charging portion 140 so that the fitting opening 52 fits into the upper intermediate metal fitting portion 162 (see FIG. 5). When the shadow of the entire insulator 110 is projected onto the water receiving portion 51 by irradiating not only the insulator 130) but also the entire insulator 110 with parallel rays parallel to the direction of gravity from below to above, the insulator portion 110 It should be formed outside the entire shadow.
(5) Each component of the present invention is conceptual and is not limited to the above embodiment. For example, the functions of one component may be distributed to a plurality of components, or the functions of the plurality of components may be integrated into one component. Further, at least a part of the configuration of the above embodiment may be replaced with a known configuration having the same function. Further, at least a part of the configuration of the above embodiment may be added or substituted with respect to the other configurations of the above embodiment.

１…ブッシングカバー３…上方覆部５…下方覆部７…中心軸
３０…本体部３１…第１部分３２…第２部分３３…第３部分
３４…第４部分３５…突出部３６…スカート部３７…上方側の開口
５０…本体部５１…水受部５２…嵌合開口５３…フランジ部
５４…孔部５５…突起部５６…突出部５７…傾斜部９０…尖頭部位
９１…底部部位１００…電線路１１０…碍子部１３０…碍子
１４０…充電部１５１…下部碍子側金具１５２…ブッシング金具
１６０…中間金具１６１…下方側中間金具部１６２…上方側中間金具部
１７１…受け金具１７２…スリーブ２００…配電線 1 ... Bushing cover 3 ... Upper covering part 5 ... Lower covering part 7 ... Central axis 30 ... Main body part 31 ... First part 32 ... Second part 33 ... Third part 34 ... Fourth part 35 ... Protruding part 36 ... Skirt part 37 ... Upper side opening 50 ... Main body 51 ... Water receiving part 52 ... Fitting opening 53 ... Flange part 54 ... Hole 55 ... Protruding part 56 ... Protruding part 57 ... Inclined part 90 ... Pointed part 91 ... Bottom part 100 ... Electric line 110 ... Insulator part 130 ... Insulator 140 ... Charging part 151 ... Lower porcelain side metal fittings 152 ... Bushing metal fittings 160 ... Intermediate metal fittings 161 ... Lower intermediate metal fittings part 162 ... Upper side intermediate metal fittings part 171 ... Receiving metal fittings 172 ... Sleeve 200 … Distribution line

Claims

An electric line extending upward from the base portion in the direction of gravity, and extends upward from the insulator portion installed on the base portion, the charging portion formed on the insulator portion, and the charging portion. In the bushing cover attached to the electric line having a covered electric line portion,
A surrounding portion that surrounds the entire charging portion and a part of the lower side of the coated electric circuit portion around an axis along the direction of gravity, and at least the charging portion is located at a position away from the charging portion. The surrounding area and
A water receiving portion having a fitting opening that fits into a predetermined portion of the charging portion, and when the water receiving portion is attached to the charging portion so that the predetermined portion of the charging portion fits into the fitting opening, the water receiving portion Also closes the surrounding space surrounded by the surrounding area on the upper side, and also has a water receiving part that receives water flowing in the surrounding space.
Equipped with
In the surrounding portion, the inner diameter of the opening on the upper side is formed to be substantially the same as the outer diameter of the coated electric circuit portion.
When the water receiving portion is attached to the charging portion so that the predetermined portion of the charging portion fits into the fitting opening, the water receiving portion is parallel to the insulator portion from below to above in the direction of gravity. When the shadow of the insulator is projected onto the water receiving portion by shining a light beam, the hole is formed outside the shadow of the insulator, and the hole through which water can pass is formed . ,
The water receiving part is
A bushing having a protruding portion formed on the lower surface of the water receiving portion, which is provided in the vicinity of the hole portion on the surrounding portion side from the hole portion and has the protruding portion protruding downward. cover.

In the bushing cover according to claim 1,
The surrounding part is
A bushing cover that encloses at least a part of the insulator portion on the upper side, and also encloses the insulator portion at a position away from the insulator portion.

In the bushing cover according to claim 2,
The surrounding part is divided into upper and lower parts.
A lower covering portion that covers at least an upper portion of the insulator portion and a lower portion that is a lower portion of the charging portion.
An upper covering portion that can be combined with the lower covering portion and that covers an upper portion on the upper side of the lower portion of the charging portion and a portion on the lower side of the covered electric circuit portion.
Bushing cover with.

In the bushing cover according to claim 3,
The lower covering portion is
With the water receiving part
The upper covering part is
A bushing cover provided with a water guiding portion that guides water flowing on the inner wall surface of the upper covering portion onto the water receiving portion.

In the bushing cover according to claim 3 or 4.
On the upper covering part,
A bushing cover having a skirt portion that covers a part of the upper side of the lower cover portion when combined with the lower cover portion.

In the bushing cover according to any one of claims 1 to 5.
The water receiving part has
A bushing cover having an inclination that descends from the side of the fitting opening toward the hole when the charging opening is attached to the charging portion so that the predetermined portion of the charging portion fits into the fitting opening.

In the bushing cover according to any one of claims 1 to 6.
The water receiving part is
A bushing cover that is a spacer that maintains a distance between the insulator portion and the charging portion and the surrounding portion so that the surrounding portion covers the electric line at a position away from the electric line.