JP4030335B2

JP4030335B2 - Lightning arrester for coaxial cable

Info

Publication number: JP4030335B2
Application number: JP2002103387A
Authority: JP
Inventors: 幸彦西; 淳一鈴木; 健介垣内
Original assignee: Shoden Corp
Current assignee: Shoden Corp
Priority date: 2002-04-05
Filing date: 2002-04-05
Publication date: 2008-01-09
Anticipated expiration: 2022-04-05
Also published as: JP2003304631A

Description

【０００１】
【発明の属する技術分野】
本発明は、避雷機能を有する同軸ケーブル用避雷器に関する。
【０００２】
【従来の技術】
同軸ケーブルは、信号伝送用として従来から多用されている。近年では移動体通信（いわゆる携帯電話）が普及の途にあり、移動体通信用の無線局・中継局が増加している。このような無線局・中継局において、同軸ケーブルは、局舎内の通信機器、および、局舎外のアンテナ間での配線に使用される。
【０００３】
このように同軸ケーブルを屋内から屋外へ配線する場合、中継機能と避雷機能とを持たせた同軸ケーブル用避雷器が使用されている。この同軸ケーブル用避雷器について図を参照しつつ説明する。図９，図１０は従来技術の同軸ケーブル用避雷器の説明図である。
同軸ケーブル用避雷器１００は、図９で示すように、避雷器本体１００ａ、屋外側フランジ１００ｂ、屋内側フランジ１００ｃ、アース端子兼アレスタ蓋１００ｄ、アース線接続部１００ｅを備えている。
【０００４】
このような同軸ケーブル用避雷器１００は、図１０で示すように、屋外側フランジコネクタ１１０、屋外ケーブル１２０、屋内側フランジコネクタ１３０、連結用同軸ケーブル１４０、同軸ケーブル用コネクタ１５０、屋内ケーブル１６０を接続することにより信号伝送路を形成する。
【０００５】
屋外にあるアンテナ（図示せず）と接続されている屋外ケーブル１２０の端部に取り付けられた屋外側フランジコネクタ１１０、および、同軸ケーブル用避雷器１００の屋外側フランジ１００ｂは、それぞれのフランジ部に設けられた複数の貫通孔にねじを挿通した後に締結固定されて接続される。
【０００６】
一方、連結用同軸ケーブル１４０の端部に取り付けられた屋内側フランジコネクタ１３０、および、同軸ケーブル用避雷器１００の屋内側フランジ１００ｃは、それぞれのフランジ部に設けられた複数の貫通孔にねじを挿通した後に締結固定されて接続される。さらに、無線機（図示せず）と接続される屋内ケーブル１６０、および、連結用同軸ケーブル１４０が同軸ケーブル用コネクタ１５０により接続固定される。
【０００７】
さらに、同軸ケーブル用避雷器１００は、アース端子１００ｅ、アース線１７０および集中接地板１８０、図示しないアース線により接地経路が形成される。
避雷器本体１００ａの内部には、図示しないが、内蔵アレスタが配置されており、同軸ケーブルである屋外ケーブル１２０および屋内ケーブル１６０の中心導体（芯線）、および、外部導体（網状導体）とにそれぞれ内蔵アレスタが接続され、これら内蔵アレスタがアース線１７０と接続される。このアース線１７０は、集中接地板１８０に接続される。外壁１９０に固定されている集中接地板１８０は、図示しないアース線を通じて接地されており、落雷・誘導雷等により流れる電流を大地へ流す。
【０００８】
続いて、このような同軸ケーブル用避雷器１００の取り付けについて説明する。図１０で示すように、同軸ケーブル用避雷器１００の連結用同軸ケーブル１４０が貫通板２００のパイプ状のケーブル導入孔２００ａに挿通された状態で、ケーブル導入孔２００ａが防水用の耐火粘土２１０により閉塞される。
このようにして同軸ケーブル用避雷器１００が取り付けられた貫通板２００は、建物の外壁１９０に設けられた貫通孔１９０ａに固定される。
【０００９】
アース線１７０が貫通板２００の下側に配置された集中接地板１８０と接続される。最終的に、屋外ケーブル１２０、および、屋内ケーブル１６０が同軸ケーブル用避雷器１００と接続される。
このような同軸ケーブル用避雷器１００は、通常は複数（例えば８個）設けられるため、集中接地板１８０に複数のアース線１７０が集中して接続されることとなる。この集中接地板１８０により、これら複数の同軸ケーブル用避雷器１００は等電位に近づく。
【００１０】
【発明が解決しようとする課題】
さて、このような同軸ケーブル用避雷器１００は以下のような問題点が知見されている。
（１）雨水や水滴の屋内への侵入を避けるため、パイプ状のケーブル導入孔２００ａを貫通板２００に溶接し、また、取り付け時には貫通板２００のケーブル導入孔２００ａの防水処理を耐火粘土２１０を用いて行う必要があり、手間を要するものであるという問題点。
（２）複数の同軸ケーブル用避雷器１００間の電位差を極力生じさせないように、同軸ケーブル用避雷器１００をアース線１７０にて集中接地板１８０に接続する必要があるが、従来では、連結用同軸ケーブル１４０を使用するため、同軸ケーブル用避雷器１００が外壁１９０から離れ、アース線１７０が長くなり、その分電位差が生じるおそれがあるという問題点。
【００１１】
本発明は、上記問題点を解決するためになされたものであり、その目的は、設置が容易である同軸ケーブル用避雷器を提供することにある。
【００１２】
【課題を解決するための手段】
上記課題を解決するためになされた、請求項１記載の発明に係る同軸ケーブル用避雷器は、
板状体の貫通孔に固定され、二本の同軸ケーブル間に介在する同軸ケーブル用避雷器において、
二本の同軸ケーブルの中心導体同士の電気的接続、二本の同軸ケーブルの外部導体同士の電気的接続、中心導体と内蔵アレスタとの接続、および、外部導体と内蔵アレスタとの接続が行われる避雷器本体と、
避雷器本体の一端に連接して形成され、一方の同軸ケーブルのフランジコネクタが接続されるケーブル接続用フランジと、
避雷器本体の他端に連接して形成され、板状体に対する位置を外側の面で当接して決定する固定用フランジと、
固定用フランジの外側の面から突出するとともに先端を除く外周面に雄ねじ部が併せて形成されており、先端にある端部で他方の同軸ケーブルが接続固定されるケーブル接続用コネクタと、
アース線が接続されて内蔵アレスタとアース線を電気的に接続するアース線接続部と、
雌ねじ部を有し、ケーブル接続用コネクタの雄ねじ部に螺挿されてケーブル接続用コネクタが板状体の貫通孔を貫通した状態で取り付けられる固定部と、
を有する同軸ケーブル用避雷器を複数備え、
板状体の貫通孔に挿通されたケーブル接続用コネクタの外周面に形成される雄ねじ部に固定部が螺挿され、固定用フランジと固定部とにより板状体へ挟持固定される複数の同軸ケーブル用避雷器は、それらのアース線接続部に接続される複数のアース線が一枚の集中接地板に接続されることを特徴とする。
【００１３】
また、請求項２記載の発明に係る同軸ケーブル用避雷器は、
板状体の貫通孔に固定され、二本の同軸ケーブル間に介在する同軸ケーブル用避雷器において、
二本の同軸ケーブルの中心導体同士の電気的接続、二本の同軸ケーブルの外部導体同士の電気的接続、中心導体と内蔵アレスタとの接続、および、外部導体と内蔵アレスタとの接続が行われる避雷器本体と、
避雷器本体の一端に連接して形成され、一方の同軸ケーブルのフランジコネクタが接続されるケーブル接続用フランジと、
避雷器本体の他端に連接して形成され、板状体に対する位置を外側の面で当接して決定する固定用フランジと、
固定用フランジの外側の面から突出するように連接して形成され、先端にある端部で他方の同軸ケーブルが接続固定されるケーブル接続用コネクタと、
アース線が接続されて内蔵アレスタとアース線を電気的に接続するアース線接続部と、
複数孔を有する環状体であり、ケーブル接続用コネクタが板状体の貫通孔を貫通した状態で取り付けられる固定部と、
を有する同軸ケーブル用避雷器を複数備え、
板状体の貫通孔に挿通されたケーブル接続用コネクタに嵌挿された固定部と固定用フランジとが、固定部、板状体および固定用フランジの複数孔を通過する複数ねじにより締結され、固定用フランジと固定部とにより板状体へ挟持固定される複数の同軸ケーブル用避雷器は、それらのアース線接続部に接続される複数のアース線が一枚の集中接地板に接続されることを特徴とする。
【００１４】
また、請求項３記載の発明に係る同軸ケーブル用避雷器は、
請求項１または請求項２に記載の同軸ケーブル用避雷器において、
前記板状体は、ケーブル接続用コネクタが挿通される貫通孔を有し、かつ造営物の外壁に貫通された孔を塞ぐ貫通板であることを特徴とする。
【００１５】
また、請求項４記載の発明に係る同軸ケーブル用避雷器は、
請求項１または請求項２に記載の同軸ケーブル用避雷器において、
前記板状体は、ケーブル接続用コネクタが挿通される貫通孔を有する造営物の外壁であることを特徴とする。
【００１６】
また、請求項５記載の発明に係る同軸ケーブル用避雷器は、
造営物の外壁に貫通された孔を塞ぐための導電体製の貫通板の貫通孔に固定されて二本の同軸ケーブル間に介在する同軸ケーブル用避雷器において、
二本の同軸ケーブルの中心導体同士の電気的接続、二本の同軸ケーブルの外部導体同士の電気的接続、中心導体と内蔵アレスタとの接続、および、外部導体と内蔵アレスタとの接続が行われる避雷器本体と、
避雷器本体の一端に連接して形成され、一方の同軸ケーブルのフランジコネクタが接続されるケーブル接続用フランジと、
避雷器本体の他端に連接して形成され、貫通板に対する位置を外側の面で当接して決定する固定用フランジと、
固定用フランジの外側の面から突出するとともに先端を除く外周面に雄ねじ部が併せて形成されており、先端にある端部で他方の同軸ケーブルが接続固定されるケーブル接続用コネクタと、
アース線が接続されて内蔵アレスタとアース線を電気的に接続するアース線接続部と、
雌ねじ部を有し、ケーブル接続用コネクタの雄ねじ部に螺挿されてケーブル接続用コネクタが貫通板の貫通孔を貫通した状態で取り付けられる固定部と、
を有する同軸ケーブル用避雷器を複数備え、
貫通板の貫通孔に挿通されたケーブル接続用コネクタの外周面に形成される雄ねじ部に固定部が螺挿され、固定用フランジと固定部とにより貫通板へ挟持固定される複数の同軸ケーブル用避雷器は貫通板により等電化されるとともに、それらのアース線接続部に接続される複数のアース線が接地されることを特徴とする。
【００１７】
また、請求項６記載の発明に係る同軸ケーブル用避雷器は、
造営物の外壁に貫通された孔を塞ぐための導電体製の貫通板の貫通孔に固定されて二本の同軸ケーブル間に介在する同軸ケーブル用避雷器において、
二本の同軸ケーブルの中心導体同士の電気的接続、二本の同軸ケーブルの外部導体同士の電気的接続、中心導体と内蔵アレスタとの接続、および、外部導体と内蔵アレスタとの接続が行われる避雷器本体と、
避雷器本体の一端に連接して形成され、一方の同軸ケーブルのフランジコネクタが接続されるケーブル接続用フランジと、
避雷器本体の他端に連接して形成され、貫通板に対する位置を外側の面で当接して決定する固定用フランジと、
固定用フランジの外側の面から突出するように連接して形成され、先端にある端部で他方の同軸ケーブルが接続固定されるケーブル接続用コネクタと、
アース線が接続されて内蔵アレスタとアース線を電気的に接続するアース線接続部と、
複数孔を有する環状体であり、ケーブル接続用コネクタが貫通板の貫通孔を貫通した状態で取り付けられる固定部と、
を有する同軸ケーブル用避雷器を複数備え、
貫通板の貫通孔に挿通されたケーブル接続用コネクタに嵌挿された固定部と固定用フランジとが、固定部、貫通板および固定用フランジの複数孔を通過する複数ねじにより締結され、固定用フランジと固定部とにより貫通板へ挟持固定される複数の同軸ケーブル用避雷器は貫通板により等電化されるとともに、それらのアース線接続部に接続される複数のアース線が接地されることを特徴とする。
【００１８】
また、請求項７記載の発明に係る同軸ケーブル用避雷器は、
請求項１〜請求項６の何れか一項に記載の同軸ケーブル用避雷器において、
前記固定用フランジは、その外側の面にＯリングを備えることを特徴とする。
【００１９】
【発明の実施の形態】
続いて、本発明の第１実施形態である同軸ケーブル用避雷器について図を参照しつつ説明する。図１は、本実施形態の同軸ケーブル用避雷器の構成図、図２，図３は同軸ケーブル用避雷器の設置状態を説明する説明図である。
【００２０】
まず、同軸ケーブル用避雷器１０の構成について説明する。
同軸ケーブル用避雷器１０は、図１で示すように、避雷器本体１１、第１接続部の一具体例であるケーブル接続用フランジ１２、第２接続部の一具体例であるケーブル接続用コネクタ１３、位置決め部の一具体例である固定用フランジ１４、Ｏリング１５、雄ねじ部１６、固定部の一具体例であるナット１７（図２参照）、アース端子兼アレスタ蓋１８を備えている。
【００２１】
避雷器本体１１は、図示しない内蔵アレスタが設けられている。内蔵アレスタは、アース端子兼アレスタ蓋１８を開けて取り替えることができる。
避雷器本体１１では、二本の同軸ケーブルが接続されたとき、二本の同軸ケーブルの中心導体同士の電気的接続、二本の同軸ケーブルの外部導体同士の電気的接続、中心導体と内蔵アレスタとの接続、および、外部導体と内蔵アレスタとの接続が行われる。
【００２２】
ケーブル接続用フランジ１２は、図２，図３で示すように屋外側の同軸ケーブル１９の端部のフランジコネクタ２０とねじ止めにより固定接続される。
ケーブル接続用コネクタ部１３は、図３で示すように屋内側の同軸ケーブル２１の端部のコネクタ２２と接続される。
【００２３】
固定用フランジ１４は、図２，図３で示すように仕切用の貫通板２３と接して位置の決定に用いられる。
Ｏリング１５は、図１で示すように、固定用フランジ１４に配置されており、図２，図３で示すように貫通板２３に取り付けられた場合、貫通板２３に設けられた貫通孔（図示せず）と接触してこの貫通孔からの漏水を防止する。
【００２４】
雄ねじ部１６は、図１で示すようにケーブル接続用コネクタ１３に形成される。この雄ねじ部１６には、図２，図３で示すようにナット１７が螺挿されて、ナット１７と固定用フランジ１４とで貫通板２３が挟持されることにより、この貫通板２３に同軸ケーブル用避雷器１０が固定される。
【００２５】
アース端子兼アレスタ蓋１８には、図１〜図３で示すように、ボルトであるアース線接続部１８ａが螺挿されており、図２，図３で示すように、アース線２４のラグ端子の孔にこのアース線接続部１８ａのボルトが挿通され、アース線２４と結線される。
アース線２４の他端は図３で示すような集中接地板２５（アースウィンド）に固定される。このようにアース線接続部１８ａと集中接地板２５とが隣接して配置されているため、アース線２４を短くすることが可能である。
【００２６】
続けて、このような同軸ケーブル用避雷器１０の取り付け方法について説明する。図２で示すようにケーブル接続用コネクタ１３を、貫通板２３の貫通孔に挿通して貫通板２３と固定用フランジ１４とが当接するように配置し、ナット１７を雄ねじ部１６に螺挿する。そして固定用フランジ１４とナット１７とにより貫通板２３を強固に挟持する。
この場合、Ｏリング１５（図１参照）が固定用フランジ１４と貫通板２３との間で挟持され、貫通孔が閉塞される。
【００２７】
続いて、同軸ケーブル１９，２１が屋内外で接続される。このような同軸ケーブル用避雷器１０が取り付けられた貫通板２３は、図３で示すように、建物の外壁２６に設けられた貫通孔２６ａに固定される。そして、アース線２４を貫通板２３の下側に設けられており、外壁２６に固定された集中接地板２５と接続する。これにより接地経路が形成される。
このような同軸ケーブル用避雷器１０は通常は複数（例えば８個）設けられるため、集中接地板２５に複数のアース線２４が集中して接続されることとなる。集中接地板２５により、これら複数の同軸ケーブル用避雷器１０は等電位に近づく。
【００２８】
なお、接地経路は各種経路を採用することが可能である。接地経路について図を参照しつつ説明する。図４，図５，図６は同軸ケーブル用避雷器の接地経路を説明する説明図である。
図４で示す接地形式では、集中接地板２５に複数（図４では３本）のアース線２４を接続し、集中接地板２５、図示しないアース線を介して接地経路を形成するものである。集中接地板２５により、これら３個の同軸ケーブル用避雷器１０は等電位に近づく。
【００２９】
なお、本実施形態では貫通板を用いないようにしても良い。具体的には、図５で示すように、ケーブル接続用コネクタ１３を挿通できる孔径の貫通孔を外壁２６に直接設け、この貫通孔にケーブル接続用コネクタ１３を挿通させ、雄ねじ部１６に外からナット１７を螺挿して締結固定する。そして、集中接地板２５に３本のアース線２４を接続し、集中接地板２５、図示しないアース線を介して接地経路を形成するものである。このようにしても本発明の実施は可能である。
【００３０】
さらにまた、同軸ケーブル用避雷器１０の本体が金属である点に着目し、図６で示すように銅板から形成した貫通板２３を用いることで同軸ケーブル用避雷器１０本体を等電位化することができる。
この場合、集中接地板は不要となる。アース線２４を接地する場合、図６で示すようにそれぞれ適宜接地しても良く、また、図示しないが一本で共通になるようにしても良い。他の集中接地板に接続してもよい。
【００３１】
以上本実施形態の同軸ケーブル用避雷器１０について説明した。
本実施形態の同軸ケーブル用避雷器１０によれば、
（１）Ｏリング１５（図１参照）により雨水や水滴の侵入が防止されるため、従来必要であったパイプ状のケーブル導入孔の溶接作業、および、防水処理用の耐火粘土封入作業が不要となり、取り付けが容易になる。
（２）従来よりも集中電極板の取り付け位置が近くなって同軸ケーブル用避雷器１０間の電位差が極力生じないという利点がある。
【００３２】
続いて本発明の第２実施形態について図を参照しつつ説明する。図７は、本実施形態の同軸ケーブル用避雷器の構成図である。
図７で示すように、ケーブル用避雷器５０は、避雷器本体５１、第１接続部の一具体例であるケーブル接続用フランジ５２、第２接続部の一具体例であるケーブル接続用コネクタ５３、位置決め部の一具体例である固定用フランジ５４、Ｏリング５５，５６（図８参照）、固定部の一具体例である環状体５７、アース端子兼アレスタ蓋５８を備えている。
【００３３】
続いて、第２実施形態との相違点である貫通板５９の締結について説明する。なお、同軸ケーブル６０およびアース線６１との接続は第１実施形態の説明と同じであるため、その説明を省略する。
貫通板５９へ同軸ケーブル用避雷器５０を取り付ける場合、まず、貫通板５９の貫通孔（図示せず）にケーブル接続用コネクタ５３を挿通する。その際、図８で示すように、固定用フランジ５４と貫通板５９とを、Ｏリング５５を介在させた状態で密着させる。
【００３４】
次に、ケーブル接続用コネクタ５３に図７矢印Ａ方向に環状体５７を挿通する。その際、環状体５７と貫通板５９とを、Ｏリング５６を介在させた状態で密着させる。
最終的にねじで固定用フランジ５４と環状体５７とを連結しつつ貫通板５９に固定する。この場合Ｏリング５５，５６により貫通孔が防水される。
【００３５】
このような同軸ケーブル用避雷器５０に対しても、第１実施形態で図４，図６を用いて説明したように、集中電極板２５にアース線２４を接地する接続方式を採用しても良い。
また、第１実施形態で図５を用いて説明したように、貫通板２３に直接アース線２４を接続しても良い。
【００３６】
【発明の効果】
以上、本発明によれば、設置が容易である同軸ケーブル用避雷器を提供することができる。
【図面の簡単な説明】
【図１】本発明の第１実施形態の同軸ケーブル用避雷器の構成図である。
【図２】同軸ケーブル用避雷器の設置状態を説明する説明図である。
【図３】同軸ケーブル用避雷器の設置状態を説明する説明図である。
【図４】同軸ケーブル用避雷器の接地経路を説明する説明図である。
【図５】同軸ケーブル用避雷器の接地経路を説明する説明図である。
【図６】同軸ケーブル用避雷器の接地経路を説明する説明図である。
【図７】本発明の第２実施形態の同軸ケーブル用避雷器の構成図である。
【図８】同軸ケーブル用避雷器の設置状態を説明する説明図である。
【図９】従来技術の同軸ケーブル用避雷器の説明図である。
【図１０】従来技術の同軸ケーブル用避雷器の説明図である。
【符号の説明】
１０同軸ケーブル用避雷器
１１避雷器本体
１２ケーブル接続用フランジ
１３ケーブル接続用コネクタ
１４固定用フランジ
１５Ｏリング
１６雄ねじ部
１７ナット
１８アース端子兼アレスタ蓋
１８ａアース線接続部
１９同軸ケーブル
２０フランジコネクタ
２１同軸ケーブル
２２コネクタ
２３貫通板
２４アース線
２５集中接地板
２６外壁
２６ａ貫通孔
５０同軸ケーブル用避雷器
５１避雷器本体
５２ケーブル接続用フランジ
５３ケーブル接続用コネクタ
５４固定用フランジ
５５，５６Ｏリング
５７環状体
５８アース端子兼アレスタ蓋
５８ａアース線接続部
５９貫通板
６０同軸ケーブル
６１アース線[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lightning arrester for a coaxial cable having a lightning protection function.
[0002]
[Prior art]
Conventionally, coaxial cables are widely used for signal transmission. In recent years, mobile communication (so-called mobile phones) has been spreading, and the number of radio stations and relay stations for mobile communication has increased. In such a radio station / relay station, the coaxial cable is used for wiring between a communication device in the station building and an antenna outside the station building.
[0003]
When the coaxial cable is wired from indoor to outdoor in this way, a lightning arrester for coaxial cable having a relay function and a lightning protection function is used. This lightning arrester for coaxial cable will be described with reference to the drawings. 9 and 10 are explanatory views of a conventional lightning arrester for coaxial cable.
As shown in FIG. 9, the coaxial cable lightning arrester 100 includes a lightning arrester main body 100a, an outdoor flange 100b, an indoor flange 100c, a ground terminal and arrester lid 100d, and a ground wire connection portion 100e.
[0004]
As shown in FIG. 10, such a coaxial cable lightning arrester 100 connects an outdoor flange connector 110, an outdoor cable 120, an indoor flange connector 130, a connecting coaxial cable 140, a coaxial cable connector 150, and an indoor cable 160. Thus, a signal transmission path is formed.
[0005]
The outdoor side flange connector 110 attached to the end of the outdoor cable 120 connected to an antenna (not shown) that is outdoors and the outdoor side flange 100b of the coaxial cable arrester 100 are provided in the respective flange portions. After the screws are inserted into the plurality of through holes formed, they are fastened and fixed and connected.
[0006]
On the other hand, the indoor flange connector 130 attached to the end of the connecting coaxial cable 140 and the indoor flange 100c of the coaxial cable lightning arrester 100 are screwed into a plurality of through holes provided in the respective flange portions. After that, it is fixed and connected. Further, the indoor cable 160 connected to the radio (not shown) and the connecting coaxial cable 140 are connected and fixed by the coaxial cable connector 150.
[0007]
Furthermore, in the lightning arrester 100 for the coaxial cable, a ground path is formed by the ground terminal 100e, the ground wire 170, the concentrated ground plate 180, and a ground wire (not shown).
Although not shown, a built-in arrester is arranged inside the lightning arrester main body 100a, and is built in the center conductor (core wire) of the outdoor cable 120 and the indoor cable 160, which are coaxial cables, and the external conductor (mesh conductor), respectively. Arrestors are connected, and these built-in arresters are connected to the ground wire 170. The ground wire 170 is connected to the concentrated ground plate 180. The concentrated grounding plate 180 fixed to the outer wall 190 is grounded through a ground wire (not shown), and allows a current flowing due to a lightning strike, induced lightning or the like to flow to the ground.
[0008]
Subsequently, the installation of such a coaxial cable arrester 100 will be described. As shown in FIG. 10, the cable introduction hole 200 a is blocked by the waterproof refractory clay 210 in a state where the connection coaxial cable 140 of the coaxial cable arrester 100 is inserted into the pipe-like cable introduction hole 200 a of the through plate 200. Is done.
In this way, the through plate 200 to which the coaxial cable arrester 100 is attached is fixed to a through hole 190a provided in the outer wall 190 of the building.
[0009]
The ground wire 170 is connected to the concentrated ground plate 180 disposed below the through plate 200. Finally, the outdoor cable 120 and the indoor cable 160 are connected to the coaxial cable arrester 100.
Since a plurality (for example, eight) of such coaxial cable arresters 100 are usually provided, a plurality of ground wires 170 are concentratedly connected to the concentrated grounding plate 180. The concentrated grounding plate 180 brings the plurality of coaxial cable arresters 100 close to equipotential.
[0010]
[Problems to be solved by the invention]
Now, such a coaxial cable arrester 100 has the following problems.
(1) In order to prevent rainwater and water droplets from entering the indoor space, the pipe-shaped cable introduction hole 200a is welded to the through plate 200, and the waterproof treatment of the cable introduction hole 200a of the through plate 200 is applied to the refractory clay 210 during installation. The problem that it is necessary to use it and is troublesome.
(2) The coaxial cable arrester 100 needs to be connected to the centralized grounding plate 180 by the ground wire 170 so as not to cause a potential difference between the plurality of coaxial cable arresters 100 as much as possible. Since 140 is used, the lightning arrester 100 for the coaxial cable is separated from the outer wall 190, and the ground wire 170 becomes longer, which may cause a potential difference.
[0011]
The present invention has been made to solve the above problems, and an object thereof is to provide a lightning arrester for a coaxial cable that can be easily installed.
[0012]
[Means for Solving the Problems]
A lightning arrester for a coaxial cable according to the invention of claim 1, which has been made to solve the above problems,
In a lightning arrester for a coaxial cable that is fixed to the through hole of the plate-like body and is interposed between two coaxial cables,
The electrical connection between the center conductors of the two coaxial cables, the electrical connection between the outer conductors of the two coaxial cables, the connection between the center conductor and the built-in arrester, and the connection between the outer conductor and the built-in arrester are performed. A lightning arrester body,
A cable connection flange formed to be connected to one end of the lightning arrester body, to which the flange connector of one coaxial cable is connected,
A fixing flange that is connected to the other end of the lightning arrester body and determines the position of the plate-like body by abutting on the outer surface ;
A cable connection connector that protrudes from the outer surface of the fixing flange and has an external thread portion formed on the outer peripheral surface excluding the tip, and the other coaxial cable is connected and fixed at the end at the tip ;
A ground wire connecting portion you electrically connect the internal arrester and ground wire grounding wire is connected,
A fixing portion having a female screw portion, screwed into the male screw portion of the cable connecting connector , and attached in a state where the cable connecting connector penetrates the through hole of the plate-like body ;
A plurality of lightning arresters for coaxial cables having
A plurality of coaxials, in which a fixing portion is screwed into a male screw portion formed on an outer peripheral surface of a cable connecting connector inserted through a through hole of the plate-like body, and is sandwiched and fixed to the plate-like body by the fixing flange and the fixing portion. The lightning arrester for cables is characterized in that a plurality of ground wires connected to the ground wire connecting portions are connected to one centralized ground plate.
[0013]
A lightning arrester for a coaxial cable according to the invention of claim 2
In a lightning arrester for a coaxial cable that is fixed to the through hole of the plate-like body and is interposed between two coaxial cables,
The electrical connection between the center conductors of the two coaxial cables, the electrical connection between the outer conductors of the two coaxial cables, the connection between the center conductor and the built-in arrester, and the connection between the outer conductor and the built-in arrester are performed. A lightning arrester body,
A cable connection flange formed to be connected to one end of the lightning arrester body, to which the flange connector of one coaxial cable is connected,
A fixing flange that is connected to the other end of the lightning arrester body and determines the position of the plate-like body by abutting on the outer surface ;
A cable connection connector formed to be connected so as to protrude from the outer surface of the fixing flange, and to which the other coaxial cable is connected and fixed at the end at the tip ;
A ground wire connecting portion you electrically connect the internal arrester and ground wire grounding wire is connected,
An annular body having a plurality of holes, and a fixing part to be attached in a state in which the connector for cable connection penetrates the through hole of the plate-like body ,
A plurality of lightning arresters for coaxial cables having
The fixing portion and the fixing flange inserted into the cable connecting connector inserted through the through hole of the plate-like body are fastened by a plurality of screws that pass through the plurality of holes of the fixing portion, the plate-like body, and the fixing flange , For multiple lightning arresters for coaxial cables that are clamped and fixed to a plate-like body by a fixing flange and a fixing part, a plurality of ground wires connected to those ground wire connection parts must be connected to a single centralized grounding plate It is characterized by.
[0014]
A lightning arrester for a coaxial cable according to the invention of claim 3
In the lightning arrester for the coaxial cable according to claim 1 or 2,
The plate-like body has a through hole connector for cable connection is inserted, and wherein the through-plate der Rukoto closing the pierced hole in the outer wall of the erecting thereof.
[0015]
A lightning arrester for a coaxial cable according to the invention of claim 4
In the lightning arrester for the coaxial cable according to claim 1 or 2,
The plate-like body, characterized by outer walls der Rukoto a of the building having a through hole connector for cable connection is inserted.
[0016]
A lightning arrester for a coaxial cable according to the invention of claim 5 is:
In a lightning arrester for a coaxial cable that is fixed to a through-hole of a through-hole plate made of a conductor for closing a hole that has been passed through the outer wall of a construction, and interposed between two coaxial cables,
The electrical connection between the center conductors of the two coaxial cables, the electrical connection between the outer conductors of the two coaxial cables, the connection between the center conductor and the built-in arrester, and the connection between the outer conductor and the built-in arrester are performed. A lightning arrester body,
A cable connection flange formed to be connected to one end of the lightning arrester body, to which the flange connector of one coaxial cable is connected,
A flange for fixing formed to be connected to the other end of the lightning arrester main body and determining the position with respect to the through plate by abutting on the outer surface ;
A cable connection connector that protrudes from the outer surface of the fixing flange and has an external thread portion formed on the outer peripheral surface excluding the tip, and the other coaxial cable is connected and fixed at the end at the tip ;
A ground wire connecting portion you electrically connect the internal arrester and ground wire grounding wire is connected,
A fixing portion that has a female screw portion, is screwed into the male screw portion of the cable connection connector, and is attached in a state where the cable connection connector passes through the through hole of the through plate ;
A plurality of lightning arresters for coaxial cables having
For a plurality of coaxial cables in which a fixing portion is screwed into a male screw portion formed on an outer peripheral surface of a cable connecting connector inserted into a through hole of a through plate, and is sandwiched and fixed to the through plate by a fixing flange and a fixing portion The lightning arrester is characterized in that it is electrified by a through plate and a plurality of ground wires connected to the ground wire connecting portions are grounded.
[0017]
A lightning arrester for a coaxial cable according to the invention of claim 6
In a lightning arrester for a coaxial cable that is fixed to a through-hole of a through-hole plate made of a conductor for closing a hole that has been passed through the outer wall of a construction, and interposed between two coaxial cables,
The electrical connection between the center conductors of the two coaxial cables, the electrical connection between the outer conductors of the two coaxial cables, the connection between the center conductor and the built-in arrester, and the connection between the outer conductor and the built-in arrester are performed. A lightning arrester body,
A cable connection flange formed to be connected to one end of the lightning arrester body, to which the flange connector of one coaxial cable is connected,
A flange for fixing formed to be connected to the other end of the lightning arrester main body and determining the position with respect to the through plate by abutting on the outer surface ;
A cable connection connector formed to be connected so as to protrude from the outer surface of the fixing flange, and to which the other coaxial cable is connected and fixed at the end at the tip ;
A ground wire connecting portion you electrically connect the internal arrester and ground wire grounding wire is connected,
An annular body having a plurality of holes, and a fixing portion to be attached in a state where the connector for cable connection penetrates the through hole of the through plate ,
A plurality of lightning arresters for coaxial cables having
The fixing part and the fixing flange that are inserted into the cable connecting connector inserted through the through hole of the through plate are fastened by a plurality of screws that pass through the fixing part, the through plate, and the fixing flange . A plurality of coaxial cable lightning arresters sandwiched and fixed to a through plate by a flange and a fixed portion are made isoelectric by the through plate, and a plurality of ground wires connected to the ground wire connection portion are grounded And
[0018]
A lightning arrester for a coaxial cable according to the invention of claim 7
In the lightning arrester for coaxial cables according to any one of claims 1 to 6,
The fixing flange includes an O-ring on an outer surface thereof.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Next, the lightning arrester for coaxial cables according to the first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram of a lightning arrester for a coaxial cable according to the present embodiment, and FIGS. 2 and 3 are explanatory views for explaining an installation state of the lightning arrester for a coaxial cable.
[0020]
First, the configuration of the coaxial cable arrester 10 will be described.
As shown in FIG. 1, the coaxial cable lightning arrester 10 includes a lightning arrester body 11, a cable connection flange 12 which is a specific example of the first connection part, a cable connection connector 13 which is a specific example of the second connection part, A fixing flange 14, which is a specific example of the positioning portion, an O-ring 15, a male screw portion 16, a nut 17 (see FIG. 2) which is a specific example of the fixing portion, and an earth terminal and arrester lid 18 are provided.
[0021]
The arrester body 11 is provided with a built-in arrester (not shown). The built-in arrester can be replaced by opening the grounding terminal and arrester lid 18.
In the lightning arrester body 11, when two coaxial cables are connected, the electrical connection between the center conductors of the two coaxial cables, the electrical connection between the outer conductors of the two coaxial cables, the center conductor and the built-in arrester, And the connection between the external conductor and the built-in arrester.
[0022]
2 and 3, the cable connecting flange 12 is fixedly connected to the flange connector 20 at the end of the outdoor coaxial cable 19 by screwing.
The cable connecting connector portion 13 is connected to a connector 22 at the end of the indoor coaxial cable 21 as shown in FIG.
[0023]
The fixing flange 14 is used for determining the position in contact with the partitioning through plate 23 as shown in FIGS.
As shown in FIG. 1, the O-ring 15 is disposed on the fixing flange 14. When the O-ring 15 is attached to the through-plate 23 as shown in FIGS. 2 and 3, the through-hole ( To prevent water leakage from this through hole.
[0024]
The male screw portion 16 is formed in the cable connecting connector 13 as shown in FIG. As shown in FIGS. 2 and 3, a nut 17 is screwed into the male screw portion 16, and the through plate 23 is sandwiched between the nut 17 and the fixing flange 14, so that the coaxial cable is connected to the through plate 23. The lightning arrester 10 is fixed.
[0025]
As shown in FIGS. 1 to 3, a ground wire connecting portion 18a, which is a bolt, is screwed into the ground terminal / arrestor lid 18, and a lug terminal of the ground wire 24 is shown in FIGS. The bolt of the ground wire connecting portion 18 a is inserted into the hole of the wire and connected to the ground wire 24.
The other end of the ground wire 24 is fixed to a concentrated ground plate 25 (earth window) as shown in FIG. Thus, since the ground wire connecting portion 18a and the concentrated ground plate 25 are disposed adjacent to each other, the ground wire 24 can be shortened.
[0026]
Next, a method for attaching the lightning arrester 10 for the coaxial cable will be described. As shown in FIG. 2, the cable connecting connector 13 is inserted into the through hole of the through plate 23 so that the through plate 23 and the fixing flange 14 come into contact with each other, and the nut 17 is screwed into the male screw portion 16. . The through plate 23 is firmly held between the fixing flange 14 and the nut 17.
In this case, the O-ring 15 (see FIG. 1) is sandwiched between the fixing flange 14 and the through plate 23, and the through hole is closed.
[0027]
Subsequently, the coaxial cables 19 and 21 are connected indoors and outdoors. As shown in FIG. 3, the through plate 23 to which the coaxial cable arrester 10 is attached is fixed to a through hole 26a provided in the outer wall 26 of the building. The ground wire 24 is provided below the through plate 23 and is connected to the concentrated ground plate 25 fixed to the outer wall 26. As a result, a ground path is formed.
Since a plurality (for example, eight) of such coaxial cable arresters 10 are usually provided, a plurality of ground wires 24 are concentratedly connected to the concentrated ground plate 25. The concentrated grounding plate 25 brings the plurality of coaxial cable arresters 10 close to equipotential.
[0028]
Various ground paths can be used. The grounding path will be described with reference to the drawings. 4, 5, and 6 are explanatory diagrams for explaining a grounding path of a coaxial cable arrester.
In the grounding type shown in FIG. 4, a plurality (three in FIG. 4) of ground wires 24 are connected to the central ground plate 25, and a ground path is formed through the central ground plate 25 and a ground wire (not shown). The three grounded arresters 10 for coaxial cables approach the equipotential by the concentrated ground plate 25.
[0029]
In the present embodiment, the through plate may not be used. Specifically, as shown in FIG. 5, a through hole having a hole diameter through which the cable connecting connector 13 can be inserted is directly provided in the outer wall 26, and the cable connecting connector 13 is inserted into the through hole, and the male screw portion 16 is externally connected. The nut 17 is screwed and fastened. Then, three ground wires 24 are connected to the concentrated ground plate 25, and a ground path is formed through the concentrated ground plate 25 and an unillustrated ground wire. Even in this way, the present invention can be implemented.
[0030]
Furthermore, paying attention to the fact that the main body of the coaxial cable lightning arrester 10 is made of metal, the coaxial cable lightning arrester 10 main body can be made equipotential by using a through plate 23 formed of a copper plate as shown in FIG. .
In this case, a central ground plate is not required. When the ground wire 24 is grounded, it may be grounded appropriately as shown in FIG. 6, or may be shared by one although not shown. It may be connected to another central ground plate.
[0031]
The coaxial cable arrester 10 of the present embodiment has been described above.
According to the lightning arrester 10 for the coaxial cable of the present embodiment,
(1) O-ring 15 (see FIG. 1) prevents rainwater and water droplets from entering, eliminating the need for conventional welding work for pipe-shaped cable introduction holes and sealing fireproof clay for waterproofing. This makes it easy to install.
(2) There is an advantage that the attachment position of the concentrated electrode plate is closer than before and the potential difference between the lightning arresters 10 for the coaxial cable is not generated as much as possible.
[0032]
Next, a second embodiment of the present invention will be described with reference to the drawings. FIG. 7 is a configuration diagram of the lightning arrester for the coaxial cable according to the present embodiment.
As shown in FIG. 7, the lightning arrester 50 for a cable includes a lightning arrester body 51, a cable connection flange 52 that is a specific example of the first connection part, a cable connection connector 53 that is a specific example of the second connection part, and positioning. A fixing flange 54, which is a specific example of the portion, O-rings 55 and 56 (see FIG. 8), an annular body 57 which is a specific example of the fixing portion, and an earth terminal / alrestor lid 58 are provided.
[0033]
Next, fastening of the through plate 59 that is a difference from the second embodiment will be described. In addition, since the connection with the coaxial cable 60 and the earth wire 61 is the same as description of 1st Embodiment, the description is abbreviate | omitted.
When attaching the coaxial cable arrester 50 to the through plate 59, first, the cable connection connector 53 is inserted into a through hole (not shown) of the through plate 59. At that time, as shown in FIG. 8, the fixing flange 54 and the through plate 59 are brought into close contact with the O-ring 55 interposed.
[0034]
Next, the annular body 57 is inserted through the cable connector 53 in the direction of arrow A in FIG. At that time, the annular body 57 and the through plate 59 are brought into close contact with the O-ring 56 interposed.
Finally, the fixing flange 54 and the annular body 57 are connected to each other with a screw and fixed to the through plate 59. In this case, the through holes are waterproofed by the O-rings 55 and 56.
[0035]
For such a lightning arrester 50 for coaxial cable, as described with reference to FIGS. 4 and 6 in the first embodiment, a connection system in which the ground wire 24 is grounded to the concentrated electrode plate 25 may be adopted. .
Further, as described with reference to FIG. 5 in the first embodiment, the ground wire 24 may be directly connected to the through plate 23.
[0036]
【The invention's effect】
As described above, according to the present invention, it is possible to provide a lightning arrester for a coaxial cable that can be easily installed.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a lightning arrester for a coaxial cable according to a first embodiment of the present invention.
FIG. 2 is an explanatory diagram for explaining an installation state of a lightning arrester for a coaxial cable.
FIG. 3 is an explanatory diagram for explaining an installation state of a lightning arrester for a coaxial cable.
FIG. 4 is an explanatory diagram illustrating a grounding path of a coaxial cable lightning arrester.
FIG. 5 is an explanatory diagram for explaining a grounding path of a coaxial cable arrester.
FIG. 6 is an explanatory diagram for explaining a grounding path of a coaxial cable lightning arrester.
FIG. 7 is a configuration diagram of a lightning arrester for a coaxial cable according to a second embodiment of the present invention.
FIG. 8 is an explanatory diagram for explaining an installation state of a lightning arrester for a coaxial cable.
FIG. 9 is an explanatory diagram of a conventional lightning arrester for coaxial cables.
FIG. 10 is an explanatory diagram of a conventional lightning arrester for coaxial cable.
[Explanation of symbols]
10 Lightning Arrester for Coaxial Cable 11 Lightning Arrester Body 12 Cable Connection Flange 13 Cable Connection Connector 14 Fixing Flange 15 O-Ring 16 Male Threaded Portion 17 Nut 18 Ground Terminal / Arrester Cover 18a Grounding Wire Connection Portion 19 Coaxial Cable 20 Flange Connector 21 Coaxial Cable 22 Connector 23 Through plate 24 Ground wire 25 Concentrated ground plate 26 Outer wall 26a Through hole 50 Coaxial lightning arrester 51 Lightning arrester body 52 Cable connection flange 53 Cable connection connector 54 Fixing flange 55, 56 O-ring 57 Ring body 58 Ground terminal Arrester lid 58a Ground wire connection portion 59 Through plate 60 Coaxial cable 61 Ground wire

Claims

In a lightning arrester for a coaxial cable that is fixed to the through hole of the plate-like body and is interposed between two coaxial cables,
The electrical connection between the center conductors of the two coaxial cables, the electrical connection between the outer conductors of the two coaxial cables, the connection between the center conductor and the built-in arrester, and the connection between the outer conductor and the built-in arrester are performed. A lightning arrester body,
A cable connection flange formed to be connected to one end of the lightning arrester body, to which the flange connector of one coaxial cable is connected,
A fixing flange that is connected to the other end of the lightning arrester body and determines the position of the plate-like body by abutting on the outer surface ;
A cable connection connector that protrudes from the outer surface of the fixing flange and has an external thread portion formed on the outer peripheral surface excluding the tip, and the other coaxial cable is connected and fixed at the end at the tip ;
A ground wire connecting portion you electrically connect the internal arrester and ground wire grounding wire is connected,
A fixing portion having a female screw portion, screwed into the male screw portion of the cable connecting connector , and attached in a state where the cable connecting connector penetrates the through hole of the plate-like body ;
A plurality of lightning arresters for coaxial cables having
A plurality of coaxials, in which a fixing portion is screwed into a male screw portion formed on an outer peripheral surface of a cable connecting connector inserted through a through hole of the plate-like body, and is sandwiched and fixed to the plate-like body by the fixing flange and the fixing portion. The lightning arrester for cables is a lightning arrester for coaxial cables, characterized in that a plurality of ground wires connected to the ground wire connecting portions are connected to one centralized ground plate.

In a lightning arrester for a coaxial cable that is fixed to the through hole of the plate-like body and is interposed between two coaxial cables,
The electrical connection between the center conductors of the two coaxial cables, the electrical connection between the outer conductors of the two coaxial cables, the connection between the center conductor and the built-in arrester, and the connection between the outer conductor and the built-in arrester are performed. A lightning arrester body,
A cable connection flange formed to be connected to one end of the lightning arrester body, to which the flange connector of one coaxial cable is connected,
A fixing flange that is connected to the other end of the lightning arrester body and determines the position of the plate-like body by abutting on the outer surface ;
A cable connection connector formed to be connected so as to protrude from the outer surface of the fixing flange, and to which the other coaxial cable is connected and fixed at the end at the tip ;
A ground wire connecting portion you electrically connect the internal arrester and ground wire grounding wire is connected,
An annular body having a plurality of holes, and a fixing part to be attached in a state in which the connector for cable connection penetrates the through hole of the plate-like body ,
A plurality of lightning arresters for coaxial cables having
The fixing portion and the fixing flange inserted into the cable connecting connector inserted through the through hole of the plate-like body are fastened by a plurality of screws that pass through the plurality of holes of the fixing portion, the plate-like body, and the fixing flange , For multiple lightning arresters for coaxial cables that are clamped and fixed to a plate-like body by a fixing flange and a fixing part, a plurality of ground wires connected to those ground wire connection parts must be connected to a single centralized grounding plate A lightning arrester for coaxial cables.

In the lightning arrester for the coaxial cable according to claim 1 or 2,
The said plate-shaped body is a through-plate which has a through-hole by which the connector for cable connection is penetrated, and blocks | closes the hole penetrated by the outer wall of the built-up thing, The coaxial cable lightning arrester characterized by the above-mentioned.

In the lightning arrester for the coaxial cable according to claim 1 or 2,
The plate-like body is a lightning arrester for a coaxial cable, wherein the plate-like body is an outer wall of a structure having a through hole through which a cable connecting connector is inserted.

In a lightning arrester for a coaxial cable that is fixed to a through-hole of a through-hole plate made of a conductor for closing a hole that has been passed through the outer wall of a construction, and interposed between two coaxial cables,
The electrical connection between the center conductors of the two coaxial cables, the electrical connection between the outer conductors of the two coaxial cables, the connection between the center conductor and the built-in arrester, and the connection between the outer conductor and the built-in arrester are performed. A lightning arrester body,
A cable connection flange formed to be connected to one end of the lightning arrester body, to which the flange connector of one coaxial cable is connected,
A flange for fixing formed to be connected to the other end of the lightning arrester main body and determining the position with respect to the through plate by abutting on the outer surface ;
A cable connection connector that protrudes from the outer surface of the fixing flange and has an external thread portion formed on the outer peripheral surface excluding the tip, and the other coaxial cable is connected and fixed at the end at the tip ;
A ground wire connecting portion you electrically connect the internal arrester and ground wire grounding wire is connected,
A fixing portion that has a female screw portion, is screwed into the male screw portion of the cable connection connector, and is attached in a state where the cable connection connector passes through the through hole of the through plate ;
A plurality of lightning arresters for coaxial cables having
For a plurality of coaxial cables in which a fixing portion is screwed into a male screw portion formed on an outer peripheral surface of a cable connecting connector inserted into a through hole of a through plate, and is sandwiched and fixed to the through plate by a fixing flange and a fixing portion A lightning arrester for a coaxial cable, characterized in that the lightning arrester is isoelectricized by a through plate and a plurality of ground wires connected to the ground wire connection portion are grounded.

In a lightning arrester for a coaxial cable that is fixed to a through-hole of a through-hole plate made of a conductor for closing a hole that has been passed through the outer wall of a construction, and interposed between two coaxial cables,
The electrical connection between the center conductors of the two coaxial cables, the electrical connection between the outer conductors of the two coaxial cables, the connection between the center conductor and the built-in arrester, and the connection between the outer conductor and the built-in arrester are performed. A lightning arrester body,
A cable connection flange formed to be connected to one end of the lightning arrester body, to which the flange connector of one coaxial cable is connected,
A flange for fixing formed to be connected to the other end of the lightning arrester main body and determining the position with respect to the through plate by abutting on the outer surface ;
A cable connection connector formed to be connected so as to protrude from the outer surface of the fixing flange, and to which the other coaxial cable is connected and fixed at the end at the tip ;
A ground wire connecting portion you electrically connect the internal arrester and ground wire grounding wire is connected,
An annular body having a plurality of holes, and a fixing portion to be attached in a state where the connector for cable connection penetrates the through hole of the through plate ,
A plurality of lightning arresters for coaxial cables having
The fixing part and the fixing flange that are inserted into the cable connecting connector inserted through the through hole of the through plate are fastened by a plurality of screws that pass through the fixing part, the through plate, and the fixing flange . A plurality of coaxial cable lightning arresters sandwiched and fixed to a through plate by a flange and a fixed portion are made isoelectric by the through plate, and a plurality of ground wires connected to the ground wire connection portion are grounded A lightning arrester for coaxial cable.

In the lightning arrester for coaxial cables according to any one of claims 1 to 6,
The lightening arrester for a coaxial cable, wherein the fixing flange includes an O-ring on an outer surface thereof .