JP3746857B2

JP3746857B2 - Cable connection closure

Info

Publication number: JP3746857B2
Application number: JP30082796A
Authority: JP
Inventors: 光治越山; 謹司峯島; 達郎及川; 光男鎌; 徹也星島; 俊幸石川; 良行吉井
Original assignee: Nippon Telegraph and Telephone Corp
Current assignee: Nippon Telegraph and Telephone Corp
Priority date: 1996-10-28
Filing date: 1996-10-28
Publication date: 2006-02-15
Anticipated expiration: 2016-10-28
Also published as: JPH10136547A

Description

【０００１】
【発明の属する技術分野】
この発明は、フィンガーホール等に配置される地下用のケーブル接続用クロージャ、特に、テンションメンバを含む光ケーブルの接続や分岐配線に用いられ、光ケーブル等の心線接続部へのアクセスが容易に行えるケーブル接続用クロージャに関する。
【０００２】
【従来の技術】
一般に、光ケーブル等のケーブルの接続に際しては、クロージャを用いて心線外被の接続を行う。このようなクロージャ、特に、地下ケーブル接続用のクロージャは内部への浸水を確実に防止できる高度な密閉性が求められる反面、また、心線接続部に容易にアクセスできることが望まれる。このため、従来のクロージャにあっては、シール部材を介してビス等により接合される２つのケースハーフからケースを構成するケース構造、あるいは、ケースに心線接続部に臨む開口を形成し、この開口にシール部材を介して蓋をビス止めするケース構造を採用し、密閉性と接続作業性の両立を図っていた。
【０００３】
【発明が解決しようとする課題】
ところが、従来のクロージャにあっては、ケーブルの接続等に際して心線接続部にアクセスするにはネジ回し等の工具を用いてビスの取外しや取付を行わなければならず、その作業が煩雑であるし、さらに心線接続部にアクセスするにはテンションメンバの取外しや取付を行わなければならないので、その作業が煩雑であるという問題があり、しかも、光ファイバの分岐・引込接続には接続作業の失敗を見越して心線に余裕を持たせた余長処理が不可欠であって、任意の心線のハンドリングも厄介であって、識別性も困難であるばかりか、心線の交換や増設もむずかしく、心線接続の安全性や、作業性の上でも構造が複雑化してコスト高となるという問題があった。特に、ハンドホールやフィンガーホール内に配設されるクロージャにあっては、ホール内の空間が狭く作業時に工具がホール壁面と干渉しやすいため、上述した問題も顕著であった。
本発明は、これら従来の欠点を排除しようとするもので、各種接続工法に対応して容易に用いられ、一目でわかる配線ができて識別性良好であり、心線接続部へのアクセスが簡便に行え、配線作業性を大巾に向上し組立解体も容易でかつ、ケーブル収納の高密度化とケーブルシールの作業性もよく、組立解体作業も良好で高い密閉性が得られるクロージャを提供することを目的としたものである。
【０００４】
【課題を解決するための手段】
本発明は、複数のケーブル挿通孔が形成されたベース部材と、キャップ状のカバー部材とからクロージャケースを構成し、該クロージャケース内に複数のケーブルの接続端部をそれぞれ接続した接続部と、該接続部からの心線余長部とを内装する心線収容体を備えたケーブル接続用クロージャにおいて、
前記ベース部材のケーブル挿通孔にゴム様弾性材からなるブッシュを嵌入して該ブッシュに前記ケーブルを貫通させ、前記ベース部材の外面に前記ケーブル挿通孔の周りで被係止部が形成された係止片を弾性屈曲可能に立設するとともに、該係止片の被係止部に係止する係止部が形成されたケーブルシールキャップを着脱自在に備えて前記ブッシュに弾接させて前記係止部を前記係止片の被係止部に係止させるとともに、
前記ベース部材の内面に前記カバー部材の開口端が嵌合可能な筒状嵌合部を形成し、該筒状嵌合部の径方向外側に被係止部が形成された複数の係止片を周方向に間隔を隔て弾性屈曲可能に立設するとともに、該係止片の被係止部に係止可能な複数の係止部を前記カバー部材に形成し、前記筒状嵌合部の内周に前記カバー部材と弾接するシール部材を設け、さらにベース部材に備えた支持部材を介して心線収容体を回動自在に重合連結配備し、各心線収容体に心線接続部収納部及び心線余長収納部を形成したものである。
【０００５】
【発明の実施の形態】
この発明は、地下ケーブル接続用のクロージャに適し、特に、配置空間が狭いフィンガーホールやハンドホールなどに配設されるクロージャに適する。このクロージャは、カバー部材の延出部の取付孔にボルトや支持ピン等を挿通させ、フィンガーホール内等に取り付けられる。
この発明にかかる光ケーブル接続用クロージャでは、カバー部材を外して、ベース部材のケーブル導入部に備えたテンションメンバ把持部にケーブルのテンションメンバを止着し、引き出された心線は内配線材料に接続し分岐配線される心線は心線収容体及びケーブル導出部を経てケース本体外に出されて配索される。クロージャ内では、心線収容体によって接続部が収納され、しかも、心線接続の交換並びに増設が簡単にでき、心線余長の収容の余分な外力のかからないででき捻回、巻き癖を生じないで一目でわかる配線ができて識別性良好であると共に、任意の心線のハンドリングが容易で取扱いも簡便であり、各心線余長の収容保持も確実で、心線の捻り防止に寄与し交換及び増設もワンタッチ可能で接続、分岐の作業を安全かつ容易にすることができる。
【０００６】
【実施の例】
以下、この発明の実施例を図１乃至図８を参照して説明すると、複数のケーブル挿通孔１が形成されたベース部材２と、キャップ状のカバー部材３とからクロージャケースを構成し、該クロージャケース内に複数のケーブルの接続端部をそれぞれ接続した接続部と、該接続部からの心線余長部とを内装する心線収容体４を備えたケーブル接続用クロージャ１０であって、前記ベース部材２のケーブル挿通孔１にゴム様弾性材からなるブッシュ１１を嵌入して、該ブッシュ１１にケーブルを貫通させ、前記ベース部材２の外面に前記ケーブル挿通孔の周りで被係止部が形成された係止片１２を弾性屈曲可能に立設するとともに、該係止片１２の被係止部１３に係止する係止部１４が形成されたケーブルシールキャップ１５を着脱自在に備えて前記ブッシュ１１に弾接させて前記係止部１４を前記係止片１２の被係止部１３に係止させると共に、前記ベース部材２の内面に前記カバー部材３の開口端が嵌合可能な筒状嵌合部２０を形成し、該筒状嵌合部２０の径方向外側に被係止部２１が形成された複数の係止片２２を周方向に間隔を隔て弾性屈曲可能に立設するとともに、該係止片２２の被係止部２１に係止可能な複数の係止部３０を前記カバー部材３に形成し、前記筒状嵌合部２０の内周に前記カバー部材３と弾接するシール部材２４を設け、さらにベース部材３に備えた支持部材５を介して複数の心線収容体４を回動自在に重合連結配備し、各心線収容体４に心線接続部収納部４０及び心線余長収納部４１を形成してケーブル接続用クロージャ１０としてある。
【０００７】
前記ベース部材２には内側テンションメンバ把持具６，７及び外側テンションメンバ把持具８を備え、該ベース部材２に形成された前記係止片２２の被係止部２１が係止穴であり、また前記カバー部材３の係止部３０が差込方向縁部および周方向縁部に傾斜面を有する係止爪で、この被係止部２１と係止部３０とがそれぞれ互いにワンタッチで嵌装係止できるようにしてある。
また、前記ケーブルシールキャップ１５は、筒状体を呈し、その係止部１４は係止穴或いは取付穴であり、前記ケーブル挿通孔１の周りの係止片１２の前記被係止部１３に着脱自在にワンタッチで嵌着されてケーブルブッシュ１１をケーブルに弾接させるようになっているが、筒状体の外周に舌状の取付片を一対または複数突設し、各取付片に形成した取付孔にネジを挿入してネジ止め方式のキャップでブッシュ１１をケーブルに弾接することもできる。
【０００８】
前記心線収容体４としては、図２に示すように心線余長巻取部４２と、単心接続部の収容部４３とを内装した偏平状トレイ４４（図３）を着脱自在に設けた偏平ケースとしてブラケット４５及び連結ピン４６を介して前記ベース部材２に取付けた支持部材５に着脱自在で、かつ回動自在に複数備えられているが、この心線収容体４は片面に心線余長収納部４１を持ち、他面に単心線接続部の収容部４３を備えるように偏平状トレイ４４を配備するのがよい。
【０００９】
さらに心線収容体４には、舌片状の心線押え４７，４８及びガイド片４９を備えて心線接続部の収容部４３並びに心線余長収納部４１が形成されて、ケーブルをイン及びアウトに誘導できるようにするのがよい。この場合心線収容体４は複数重合連設し、各心線収容体４が一枚づつ或いは二枚以上連結ピン４６を中心としてブラケット４５上に回動させて垂直状態から水平状態に変位させて内部への配線取扱処理が簡便化できるようにしてある。
【００１０】
図１の例のクロージャ１０は、フィンガーホール内に収容され、分岐光ケーブルＩＰの複数（本実施の形態では８）の引き込み光ケーブルへの分岐接続に用いられる。図中明示しないが、分岐光ケーブルは８本の引き込み光ケーブルに対応した８本の支線光ケーブルを外被により被覆してなり、これら支線光ケーブルおよび引き込み光ケーブルがそれぞれ心線（光ファイバ）と２本のテンションメンバを被覆して構成される。
【００１１】
前記ベース部材２には、底外面の中央に複数のケーブル挿通孔１のある大径ボス部と周辺部に８つの小径ボス部を周方向に離間して形成される。この小径ボス部および大径ボスにはそれぞれキャップが嵌着されるが、スリット１６のあるシールキャップ１５（図５参照）が小径ボス部に、また大径ボス部にはドロップシールキャップ２５（図６参照）が嵌着する。これらボス部には外面側からブッシュが嵌入され、このブッシュがキャップ１５，２５により保持されて弾着される。このブッシュは、エラストマやゲル、あるいはゴム等から円錐台形状に成形され、大径ボス部に嵌入するものではヒョウタン状の８つの挿通孔が周方向に等間隔に離間して形成されて、各挿通孔支線光ケーブルが挿通され、変形した状態で大径ボス部内に圧入されてドロップシールキャップ２５により保持される。
【００１２】
同様に、小径ボス部には単一孔のあるブッシュ１１が嵌入され、このブッシュ１１がシールキャップ１５により保持されて弾着する。ブッシュ１１もゲル等から略円錐台形状に成形され、引き込み光ケーブルが挿通される断面略ヒョウタン状の挿通孔を有し、変形した状態でケーブルを小径導入孔内に圧入され、シールキャップ１５により保持される（図１参照）。
例えば、ケーブルブッシュ１１は、ケーブル挿入孔１を略ヒョウタン形状、若しくはマユダマ形状の単一孔或いは、複数孔の集合タイプとした筒状体で、その一端或いは、両端部が若干硬度の熱可塑性ゴム組成物（硬度３０〜１００Ｈｓ好ましくは４０〜８０Ｈｓ）からなる外層でその中央部が低硬度の熱可塑性ゴム組成物（硬度０〜３０Ｈｓ好ましくは２〜１０Ｈｓ）がらなる内層のサンドウィッチ構造の３層或いは２層積層成形品（図示せず）を用いるのがよく、前記シールキャップ１５，２５の嵌着で押し付け挾持することにより、弾接され確実なシール性を保つことができる。即ち、高低硬度の積層構造でシールキャップの締結力の低減がはかられると共に高硬度外層により低硬度内装のフロ止めになってシール性を大巾に向上できるようになっている。
【００１３】
また、ベース部材２内面には、テンションメンバ把持具６，７（図７及び図８）が、中央部とその外周辺に固着され、ケーブルの保持を確実にするように組立てられるが、このテンションメンバ把持具７には前記心線収容体４の支持部材５の取付部７_１を突設し、メンバ取付孔７_２及びベース部材２への取付孔７_３を有しており、またテンションメンバ把持具６にも取付部６_１、メンバ取付孔６_２及びベース部材２への取付孔６_３が備えられている。
なお、このテンションメンバ把持具６，７ではクロージャ１０内にケーブル挿通孔１から導入されるケーブルをテンションメンバ把持具６，７に添わせ、ケーブルから引き出されたテンションメンバをテンションメンバ把持具６，７にあるメンバ取付孔６ _２，７ _２に取付けるネジで取付部６ _１，７ _１に止着させて用いられる。
【００１４】
図９乃至図１１の具体例では、クロージャ１０のベース部材２に立設した支持部材５に配備した心線収容体４をドロップ用クロージャとしての心線収納用品（図１０及び図１１）を収納して用いるようにした例で、心線巻取部４２と、心線接続部収納部４３とを心線押え４７のあるガイドリブにより区画形成し、心線余長と接続部とを収納するケース体としてクロージャ１０内に装備したものである。なお、前記心線収容体４内の区画には図１０及び図１１に示すように、ケーブルドロップ用収納用品として心線余長巻取部４２と、単心接続部の収容部４３とを区画して集合配備し、該接続部の収容部４３をスリット４３_１のあるリブ４３_２と高低差のあるリブ４３_３とで構成するのもよい。この場合、この心線収容体４はヘッド部のあるノブ４_１で支持部材５に挿脱自在に連結されると共に回動可能として取扱処理しやすい形態としてある。
【００１５】
前記カバー部材３は、図１および図９に示すように、上端が略半球状に閉止、下端が開口した有底円筒状をなし、樹脂の射出成形等により成形される。このカバー部材３の外周面には、閉止端側に８つのリブ３１と、また、開口端側に８つの係止爪の係止部３０とが設けられ、必要に応じて位置決め用突条と、中間部に複数の滑り止め用の突条とが一体に形成される。前記リブ３１にはそれぞれ挿通孔が形成され、これら挿通孔に取付用のボルトや支持ピンが挿通する。係止部３０は、周方向に一定間隔で形成され、開口端側および周方向一側にそれぞれ傾斜面のある係止爪が形成され、ベース部材２の係止片２２の係止穴２１に嵌合係止する。
【００１６】
この実施の形態にあっては、分岐光ケーブルと引き込み光ケーブルを接続する場合、先ず、分岐光ケーブルをシールキャップ１５とブッシュ１１に挿通してベース部材２のケーブル挿入孔１に貫通させ、また同様に、集合引き込み光ケーブルをキャップ２５とブッシュに挿通してベース部材２の中央の大径ケーブル挿入孔に挿通し、これらケーブルの接続側端部をベース部材２の内面側に引き出す。そして、ブッシュを嵌入してシールキャップ１５，２５で係止止着し、また、各ケーブルのテンションメンバを止着する。
【００１７】
ここで、各シールキャップ１５，２５を弾性的に屈曲させて、各シールキャップ１５，２５の係止部１４（係止穴）に係止片１２の被係止部１３（係止爪）を嵌合係止させ、そのブッシュをケーブルに弾接して押圧する。このため、シールキャップ１５，２５の取付は工具を用いることなく行え、また、ブッシュが弾性変形を生じてケーブルに弾接し、高い封止性が得られる。この場合各キャップは押し込み方式に代えてネジ止め方式を採用することもできる。
【００１８】
また、予め組み付けられた支持部材５と心線収容体４との取付も工具を用いることなく簡単に、いわゆるワンタッチで行える。
次いで、各ケーブルの光ファイバを心線収容体４の配索穴から心線接続部収納部４０内に導いてコネクタにより接続し、コネクタをコネクタ収容部となる心線接続部収容部４３内に収容し、また、余長部分を心線余長巻取部４２に巻回保持する。
【００１９】
この後、カバー部材３をベース部材２に取り付けて心線収容体４をシール部材を介して被蓋する。すなわち、カバー部材３の開口端をベース部材２の嵌合筒部２０と嵌合させる。ここで、カバー部材３は、開口端外周の係止部３０（係止爪）が係止片２２を弾性的に屈曲させて係止片２２の被係止部２１（係止穴）に嵌合係止してベース部材２に取り付けられる。このため、カバー部材３の取付も工具を用いることなく簡単にワンタッチで行え、しかもカバー部材３の開口端内周面との間に全周にわたってシール部材２４が介在して弾着するため、水密性を保って内部への水の浸入等を確実に防止できる。
また、ケーブルの再接続等は、前述した手順と逆に、カバー部材３をベース部材２から取外し、さらに、必要に応じて心線収容体４を取り外して行いケーブルの再接続も容易に行える。
【００２０】
また、上述した実施の形態にあって、係止片の係止穴及び係止爪は相対関係にあるので、これらの係止関係を逆に形成することも可能である。
また、テンションメンバの止着も工具を用いることなく行えるように構成するが、ベース部材２に金属製の止着用部材を取り付け、この止着部材にねじ等を用いテンションメンバを止着し、高い止着強度を得ることも可能である。
【００２１】
【発明の効果】
本発明は、複数のケーブル挿通孔が形成されたベース部材と、キャップ状のカバー部材とからクロージャケースを構成し、該クロージャケース内に複数のケーブルの接続端部をそれぞれ接続した接続部と、該接続部からの心線余長部とを内装する心線収容体を備えたケーブル接続用クロージャにおいて、前記ベース部材のケーブル挿通孔にゴム様弾性材からなるブッシュを嵌入して該ブッシュに前記ケーブルを貫通させ、前記ベース部材の外面に前記ケーブル挿通孔の周りで被係止部が形成された係止片を弾性屈曲可能に立設するとともに、該係止片の被係止部に係止する係止部が形成されたケーブルシールキャップを着脱自在に備えて前記ブッシュに弾接させて前記係止部を前記係止片の被係止部に係止させるとともに、前記ベース部材の内面に前記カバー部材の開口端が嵌合可能な筒状嵌合部を形成し、該筒状嵌合部の径方向外側に被係止部が形成された複数の係止片を周方向に間隔を隔て弾性屈曲可能に起設するとともに、該係止片の被係止部に係止可能な複数の係止部を前記カバー部材に形成し、前記筒状嵌合部の内周に前記カバー部材と弾接するシール部材を設け、さらにベース部材に備えた支持部材を介して心線収容体を回動自在に重合連結配備し、各心線収容体に心線接続部収納部及び心線余長収納部を形成したベース部材へのカバー部材の着脱が工具を用いることなく行え、かつ、高い密閉性が維持できるため、ケーブルの接続作業が容易に行え、また、内部への水の浸入等も確実に防止できるほか、ケーブルの接続等に際してのケース内部へのアクセスが工具を用いることなく行え、また、テンションメンバの止着も最小工具で行える。このためケーブルの接続作業を容易かつ短時間で行え、ケーブルの設置費用の低減等が図れ、しかもケーブル取付が１個のベース部材のみによる作業のため作業向上が得られると共に、スリーブシール部分に粘着シール材・コンパウンドを使用しないので組立・解体作業が容易であり、ハンドホールやフィンガーホール内でのクロージャの設置自由度も大きく設置作業が容易であり、ケーブルに接続される光ファイバー心線を単心接続部を介して単心線に分岐され、各単心線の他端の心線接続の交換並びに増設が簡単にでき、心線余長の収容も余分な外力のかからないででき捻回、巻き癖を生じないで一目でわかる配線ができて識別性良好で、しかも任意の心線のハンドリングが可能で取り扱い容易であり、安全な接続処理作業が行えて、作業性を大巾に向上すると共に、単心接続部と心線余長とが完全に分離状態で納められるし、心線接続部のみ収容部に固定すればよいので、余分な収納部材を不要とし、低コストで生産できるなど実用上の効果がある。
【図面の簡単な説明】
【図１】本発明の一の実施の形態に係るケーブル接続用クロージャを示し、（ａ）はその一部分離状態の縦断面図、（ｂ）は底面図、（ｃ）はベース部材のみの内部を示す平面図である。
【図２】図１の例で用いられた心線収容体を示し、（ａ）は展開側面図、（ｂ）はその平面図、（ｃ）は分離状態の正面図である。
【図３】図２の例で用いられるトレイの平面図である。
【図４】図１の例のベース部材を示し、（ａ）はその平面図、（ｂ）はＡ−Ａ線における縦断面図、（ｃ）は底面図、（ｄ）はＢ−Ｂ線における縦断面図である。
【図５】本発明で用いられるシールキャップを示し、（ａ）はその平面図、（ｂ）は正面図、（ｃ）は切断正面図、（ｄ）は側面図である。
【図６】本発明で用いられる集合ドロップシールキャップを示し、（ａ）はその平面図、（ｂ）は底面図、（ｃ）は側面図、（ｄ）は切断正面図である。
【図７】本発明で用いられるケーブル把持金具を示し、（ａ）はその平面図、（ｂ）は正面図、（ｃ）はＥ−Ｅ線における縦断面図、（ｄ）は一部切断側面図である。
【図８】本発明で用いられるもう一つのケーブル把持金具を示し、（ａ）はその平面図、（ｂ）は正面図、（ｃ）はＦ−Ｆ線における縦断面図、（ｄ）はＧ−Ｇ線における縦断面図である。
【図９】本発明の他の実施例で、一部の分離状態を示す縦断面図である。
【図１０】図９の例の心線収容体を示し、（ａ）はその平面図、（ｂ）はＣ−Ｃ線における縦断面図、（ｃ）は側面図である。
【図１１】図１０の例の一部の拡大詳細図で、（ａ）は平面図、（ｂ）は正面図、（ｃ）Ｄ−Ｄ線における縦断面図である。
【符号の説明】
１ケーブル挿通孔
２ベース部材
３カバー部材
４心線収容体
５支持部材
６，７，８テンションメンバ把持具
１０クロージャ
１１ブッシュ
１２係止片
１３被係止部
１４係止部
１５ケーブルシールキャップ
１６スリット
２０筒状嵌合部
２１被係止部
２２係止片
２４シール部材
２５シールキャップ
３０係止部
４０心線接続部収納部
４１心線余長収納部
４２心線余長巻取部
４３収容部
４４偏平状トレイ
４５ブラケット
４６連結ピン[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an underground cable connection closure arranged in a finger hole or the like, in particular, a cable that can be used for connection or branch wiring of an optical cable including a tension member and can easily access a core connection part such as an optical cable. It relates to a connection closure.
[0002]
[Prior art]
Generally, when connecting a cable such as an optical cable, a core wire jacket is connected using a closure. Such a closure, particularly a closure for connecting an underground cable, is required to have a high degree of sealing that can reliably prevent water from entering the interior, but it is also desired that the core wire connecting portion can be easily accessed. For this reason, in the conventional closure, a case structure that constitutes the case from two case halves joined by a screw or the like through a seal member, or an opening that faces the core wire connecting portion is formed in the case. A case structure in which the lid is screwed to the opening via a seal member has been adopted to achieve both sealing performance and connection workability.
[0003]
[Problems to be solved by the invention]
However, in the case of the conventional closure, in order to access the core wire connection portion when connecting the cable, etc., it is necessary to remove and attach the screw using a tool such as a screwdriver, which is complicated. In addition, since the tension member must be removed and attached to access the core wire connection part, there is a problem that the work is complicated, and the connection work is not necessary for the branching / retracting connection of the optical fiber. It is indispensable to handle the excess length with a margin in mind in anticipation of failure, handling of the arbitrary core is troublesome, difficult to distinguish, and replacement or expansion of the core is difficult. However, there is a problem that the structure becomes complicated and the cost is increased in terms of safety of the core connection and workability. In particular, in the closure disposed in the hand hole or the finger hole, the above-described problem is remarkable because the space in the hole is narrow and the tool easily interferes with the wall surface of the hole during work.
The present invention is intended to eliminate these conventional drawbacks, and can be easily used for various connection methods, can be easily understood at a glance, has good discrimination, and has easy access to the core wire connection part. Provided with a closure that can greatly improve wiring workability, facilitate assembly and disassembly, increase the density of cable storage and workability of cable seals, provide good assembly and disassembly work, and provide high sealing performance. It is for the purpose.
[0004]
[Means for Solving the Problems]
The present invention comprises a base member in which a plurality of cable insertion holes are formed and a cap-shaped cover member to form a closure case, and connecting portions each connecting connection ends of a plurality of cables in the closure case; In the cable connection closure provided with the core wire container that internally includes the extra length portion of the core wire from the connection portion,
By fitting a bush made of a rubber-like elastic material is communicated transmural the cable to the bush in the cable insertion hole of the base member, the locked portion is formed around the cable insertion hole to the outer surface of the base member The locking piece is erected so as to be elastically bendable, and a cable seal cap formed with a locking portion for locking to the locked portion of the locking piece is detachably provided and elastically contacted with the bush. While locking the locking portion to the locked portion of the locking piece,
A plurality of locking pieces in which a cylindrical fitting portion capable of fitting the opening end of the cover member is formed on the inner surface of the base member, and a locked portion is formed on the radially outer side of the cylindrical fitting portion. And a plurality of locking portions that can be locked to the locked portions of the locking pieces are formed on the cover member. A seal member that elastically contacts the cover member is provided on the inner periphery, and further, a core wire container is rotatably connected via a support member provided on the base member, and the core wire connection part is stored in each core wire container. And a cord extra length storage part are formed.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
The present invention is suitable for a closure for connecting an underground cable, and particularly suitable for a closure arranged in a finger hole or a hand hole having a narrow arrangement space. The closure is attached in a finger hole or the like by inserting a bolt, a support pin, or the like through an attachment hole in the extending portion of the cover member.
In the optical cable connection closure according to the present invention, the cover member is removed, the tension member of the cable is fixed to the tension member holding portion provided in the cable introduction portion of the base member, and the drawn core wire is connected to the internal wiring material The core wires to be branched and wired are routed out of the case main body through the core wire accommodating body and the cable lead-out portion. Inside the closure, the connection part is housed by the core wire container, and the connection and expansion of the core wire connection can be easily performed, and there is no need for extra external force to accommodate the extra length of the core wire, resulting in twisting and curling. Wiring is easy to understand at a glance without any need, easy handling of any core wire, easy handling, reliable storage and holding of each core wire length, contributing to prevention of twisting of the core wire Replacement and expansion can be done with one touch, making connection and branching work safe and easy.
[0006]
[Example]
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 8. A base member 2 having a plurality of cable insertion holes 1 and a cap-shaped cover member 3 constitute a closure case, A cable connection closure 10 including a core wire container 4 that internally includes a connection portion in which connection ends of a plurality of cables are connected in a closure case, and a core wire extra length portion from the connection portion, A bush 11 made of a rubber-like elastic material is fitted into the cable insertion hole 1 of the base member 2, and the cable is passed through the bush 11, so that the outer surface of the base member 2 is locked around the cable insertion hole. A cable seal cap 15 is provided that is detachably provided with a locking portion 12 that is locked to the locked portion 13 of the locking piece 12. Before A cylinder that is brought into elastic contact with the bush 11 so that the locking portion 14 is locked to the locked portion 13 of the locking piece 12 and the open end of the cover member 3 can be fitted to the inner surface of the base member 2. A plurality of locking pieces 22 each having a locked portion 21 formed radially outward of the cylindrical fitting portion 20 are provided so as to be elastically bent at intervals in the circumferential direction. At the same time, a plurality of locking portions 30 that can be locked to the locked portion 21 of the locking piece 22 are formed on the cover member 3, and the cover member 3 and the elastic member are arranged on the inner periphery of the cylindrical fitting portion 20. A sealing member 24 is provided in contact with each other, and a plurality of core wire containers 4 are rotatably connected via a support member 5 provided on the base member 3. The cable connecting closure 10 is formed by forming the cable 40 and the extra length housing portion 41.
[0007]
The base member 2 includes inner tension member gripping tools 6 and 7 and an outer tension member gripping tool 8, and the locked portion 21 of the locking piece 22 formed on the base member 2 is a locking hole, Further, the locking portion 30 of the cover member 3 is a locking claw having inclined surfaces at the insertion direction edge and the circumferential direction edge, and the locked portion 21 and the locking portion 30 are fitted to each other with one touch . It can be locked.
Further, the cable seal cap 15 exhibits a cylindrical body, the locking portion 14 is locking hole or mounting hole, the locked portion 13 of the locking pieces 12 around the cable insertion holes 1 The cable bush 11 is detachably fitted with a single touch so that the cable bush 11 is elastically contacted with the cable. A pair or a plurality of tongue-like attachment pieces are provided on the outer periphery of the cylindrical body to form each attachment piece. It is also possible to insert a screw into the mounting hole and elastically contact the bush 11 to the cable with a screw-type cap.
[0008]
As the core wire container 4, a flat tray 44 (FIG. 3) in which a core wire extra length winding portion 42 and a single core connection portion housing portion 43 are housed is detachably provided as shown in FIG. 2. As a flat case, a plurality of detachable and turnable support members 5 attached to the base member 2 via the bracket 45 and the connecting pin 46 are provided. It is preferable that the flat tray 44 is provided so as to have the extra wire length accommodating portion 41 and to include the accommodating portion 43 of the single-core wire connecting portion on the other surface.
[0009]
More core container 4, in housing portion 43 and the core wire excess length accommodating portion 41 of the core wire connection portion comprises a tongue-like core wire retainer 47, 48 and the guide piece 49 is formed, in a cable And you should be able to be guided out and out. In this case, a plurality of the core wire accommodating bodies 4 are connected in series, and each core wire accommodating body 4 is rotated on the bracket 45 around the connecting pin 46 one by one or more to be displaced from the vertical state to the horizontal state. This makes it easy to handle the wiring inside.
[0010]
The closure 10 in the example of FIG. 1 is accommodated in a finger hole and used for branch connection to a plurality (8 in the present embodiment) of lead-in optical cables of the branch optical cable IP. Although not clearly shown in the figure, the branch optical cable is formed by covering eight branch optical cables corresponding to eight lead-in optical cables with a sheath, and each of the branch optical cable and the lead optical cable includes a core wire (optical fiber) and two tensions. It is constructed by covering the members.
[0011]
The base member 2 is formed with a large-diameter boss portion having a plurality of cable insertion holes 1 in the center of the outer surface of the bottom and eight small-diameter boss portions in the peripheral portion spaced apart in the circumferential direction. A cap is fitted to each of the small-diameter boss and the large-diameter boss. A seal cap 15 having a slit 16 (see FIG. 5) is provided on the small-diameter boss, and a drop seal cap 25 (see FIG. 5) is provided on the large-diameter boss. 6). Bushes are fitted into these boss portions from the outer surface side, and the bushes are held by the caps 15 and 25 and are elastically attached. This bush is formed into a truncated cone shape from elastomer, gel, rubber or the like, and is inserted into the large-diameter boss part, and eight gourd-shaped insertion holes are formed at equal intervals in the circumferential direction. The insertion hole branch line optical cable is inserted, pressed into the large-diameter boss portion in a deformed state, and held by the drop seal cap 25.
[0012]
Similarly, a bush 11 having a single hole is fitted into the small-diameter boss portion, and this bush 11 is held by the seal cap 15 and is elastically attached. The bush 11 is also formed into a substantially frustoconical shape from gel or the like, has an insertion hole with a substantially gourd-shaped cross-section through which the drawing optical cable is inserted, and the cable is press-fitted into the small-diameter introduction hole in a deformed state and held by the seal cap 15 (See FIG. 1).
For example, the cable bush 11 is a cylindrical body in which the cable insertion hole 1 is a single hole of a substantially gourd shape, or a single hole or an aggregate type of a plurality of holes, and one end or both ends of a thermoplastic rubber having a slight hardness. Three layers of an inner layer of a sandwich structure having an outer layer made of a composition (hardness 30 to 100 Hs, preferably 40 to 80 Hs) and having a low center thermoplastic rubber composition (hardness 0 to 30 Hs, preferably 2 to 10 Hs) It is preferable to use a two-layer laminated molded product (not shown). By pressing and holding the seal caps 15 and 25, the elastic contact can be maintained and a reliable sealing property can be maintained. In other words, the tightening force of the seal cap can be reduced by the high and low hardness laminated structure, and the high hardness outer layer can be used as a flow stopper for the low hardness interior to greatly improve the sealing performance.
[0013]
On the inner surface of the base member 2, tension member gripping tools 6 and 7 (FIGS. 7 and 8) are fixed to the central portion and the outer periphery thereof, and are assembled to ensure the holding of the cable. the members gripper 7 projecting mounting portion ₇₁ of the support member 5 of the core wire receiving member 4 has a mounting hole 7 ₃ to member attaching hole 7 ₂ and the base member 2, also tension members gripper 6 to the mounting portion _{61 also} has mounting holes 6 ₃ to member attaching hole 6 ₂ and the base member 2 is provided.
In this tension member gripping tool 6, 7, the cable introduced from the cable insertion hole 1 into the closure 10 is attached to the tension member gripping tool 6, 7, and the tension member pulled out from the cable is attached to the tension member gripping tool 6, 7. 7 used by secured to the member attachment hole ₆ 2, ₇ mounting portion ₆₁ by a screw attached to the _2, _{7 1} in.
[0014]
In the specific examples of FIGS. 9 to 11, a core wire storage article (FIG. 10 and FIG. 11) that stores the core wire container 4 disposed on the support member 5 erected on the base member 2 of the closure 10 as a drop closure is stored. In this case, the core wire winding portion 42 and the core wire connection portion storage portion 43 are partitioned by the guide rib with the core wire presser 47, and the extra length of the core wire and the connection portion are stored. It is equipped in the closure 10 as a body. As shown in FIGS. 10 and 11, the core wire container 4 has a core wire extra length winding portion 42 and a single core connection portion storage portion 43 as cable drop storage articles. and collectively deployed, it may be to configure the housing portion 43 of the connection portion between the rib 43 ₂ and the rib 43 ₃ with a height difference with a slit 43 _1. In this case, the core container 4 is as handling manageable form as rotatable while being connected to detachably to the support member 5 Knob 4 ₁ with a head portion.
[0015]
As shown in FIGS. 1 and 9, the cover member 3 has a bottomed cylindrical shape with its upper end closed in a substantially hemispherical shape and its lower end opened, and is formed by resin injection molding or the like. The outer peripheral surface of the cover member 3, and eight ribs 31 on the closed end side, also, and the locking portion 30 of the eight latch lugs on the opening end side is provided, and the positioning protrusion optionally a protrusion for multiple slip in the intermediate portion are integrally formed. Insertion holes are formed in the ribs 31, and mounting bolts and support pins are inserted through these insertion holes. The locking portions 30 are formed at regular intervals in the circumferential direction, and locking claws having inclined surfaces are formed on the opening end side and the circumferential direction side, respectively, in the locking holes 21 of the locking pieces 22 of the base member 2. Engage and lock.
[0016]
In this embodiment, when connecting the branch optical cable and the lead-in optical cable, first, the branch optical cable is inserted through the seal cap 15 and the bush 11 to penetrate the cable insertion hole 1 of the base member 2, and similarly, The collective drawing optical cable is inserted into the cap 25 and the bush and inserted into the large-diameter cable insertion hole in the center of the base member 2, and the connection side end of these cables is pulled out to the inner surface side of the base member 2. Then, the bush is inserted and locked with the seal caps 15 and 25, and the tension member of each cable is fixed.
[0017]
Here, the seal caps 15 and 25 are elastically bent, and the locked portions 13 (locking claws) of the locking pieces 12 are inserted into the locking portions 14 (locking holes) of the seal caps 15 and 25. to Hamagogakaritome, to press the elastic contact with the bush in the cable. For this reason, the seal caps 15 and 25 can be attached without using a tool, and the bush is elastically deformed to elastically contact the cable, thereby obtaining high sealing performance. In this case, each cap can adopt a screwing method instead of the pushing method.
[0018]
Further, the attachment of the support member 5 and the core wire container 4 assembled in advance can be easily performed with a so-called one-touch without using a tool.
Next, the optical fiber of each cable is guided from the routing hole of the core wire housing 4 into the core wire connection portion housing portion 40 and connected by a connector, and the connector is inserted into the core wire connection portion housing portion 43 serving as the connector housing portion. The extra length portion is wound and held in the core wire extra length take-up portion 42.
[0019]
Thereafter, the cover member 3 is attached to the base member 2 and the core wire container 4 is covered with the seal member. That is, the opening end of the cover member 3 is fitted with the fitting cylinder portion 20 of the base member 2. Here, the cover member 3 is fitted in the locked portion 21 (locking hole) of the locking piece 22 by the locking portion 30 (locking claw) on the outer periphery of the opening end elastically bending the locking piece 22. The base member 2 is attached in a locked manner. Therefore, attachment of the cover member 3 is also performed by simple one-touch without using a tool, and since the bullet wear seal member 24 is interposed entire circumference between the opening end inner peripheral surface of the cover member 3, watertight It is possible to reliably prevent water from entering the interior while maintaining the properties .
Also, reconnection of the cable, etc., can be easily performed by removing the cover member 3 from the base member 2 and removing the core wire container 4 as necessary, contrary to the above-described procedure.
[0020]
Further, in the above-described embodiment, since the locking holes and the locking claws of the locking pieces are in a relative relationship, it is possible to reverse these locking relationships.
Further, the tension member can be fixed without using a tool, but a metal fixing member is attached to the base member 2, and the tension member is fixed to the fixing member using screws or the like. It is also possible to obtain a fastening strength.
[0021]
【The invention's effect】
The present invention comprises a base member in which a plurality of cable insertion holes are formed and a cap-shaped cover member to form a closure case, and connecting portions each connecting connection ends of a plurality of cables in the closure case; In a cable connection closure provided with a core wire housing body that includes a core wire extra length portion from the connection portion, a bush made of a rubber-like elastic material is fitted into the cable insertion hole of the base member, and the bush is A locking piece having a locking portion formed around the cable insertion hole is erected on the outer surface of the base member so as to be elastically bendable, and is engaged with the locking portion of the locking piece. A cable seal cap formed with a locking part to be stopped is detachably provided and elastically contacted with the bush to lock the locking part to the locked part of the locking piece, and Formed on the surface is a cylindrical fitting portion into which the open end of the cover member can be fitted, and a plurality of locking pieces having locked portions formed radially outward of the cylindrical fitting portion in the circumferential direction A plurality of locking portions that can be elastically bent at intervals and that can be locked to the locked portions of the locking pieces are formed on the cover member, and the inner periphery of the cylindrical fitting portion A seal member that elastically contacts the cover member is provided, and further, a core wire container is rotatably connected via a support member provided in the base member, and a core wire connection portion and a core wire are provided in each core wire container. The cover member can be attached to and detached from the base member with the extra storage space without using a tool, and high sealing performance can be maintained, making it easy to connect the cable and allowing water to enter the interior. Etc. can be surely prevented, and access to the inside of the case when connecting cables etc. Done without that you are, also, perform the fastening of the tension member at a minimum tool. For this reason, cable connection work can be done easily and in a short time, the installation cost of the cable can be reduced, and the work can be improved because only one base member is attached to the cable. Since no sealant / compound is used, assembly and disassembly work is easy, and there is a large degree of freedom for installation of closures in hand holes and finger holes, making the installation work easy, and a single optical fiber core connected to the cable. Branched to a single core wire through the connection, it is easy to replace and expand the core wire connection at the other end of each single core wire, and to accommodate the extra length of the core wire without applying extra external force. Wiring that can be seen at a glance without causing wrinkles, good identification, easy handling and handling of any core wire, safe connection processing work, Together to improve sexual so greatly, to a single-fiber connection section and the cord extra length is accommodated completely separated state, so may be fixed in the housing portion only core wire connection portion, and eliminate the need for extra storage member There are practical effects such as low-cost production.
[Brief description of the drawings]
1A and 1B show a cable connection closure according to an embodiment of the present invention, in which FIG. 1A is a longitudinal sectional view showing a partially separated state, FIG. 1B is a bottom view, and FIG. FIG.
2 shows a core wire container used in the example of FIG. 1, (a) is a developed side view, (b) is a plan view thereof, and (c) is a front view in a separated state.
FIG. 3 is a plan view of a tray used in the example of FIG.
4 shows the base member of the example of FIG. 1, wherein (a) is a plan view thereof, (b) is a longitudinal sectional view taken along line AA, (c) is a bottom view, and (d) is a line BB. FIG.
5A is a plan view of the seal cap used in the present invention, FIG. 5B is a front view, FIG. 5C is a cut front view, and FIG. 5D is a side view.
6A and 6B show a collective drop seal cap used in the present invention, in which FIG. 6A is a plan view, FIG. 6B is a bottom view, FIG. 6C is a side view, and FIG.
7A and 7B show a cable gripping fitting used in the present invention, wherein FIG. 7A is a plan view thereof, FIG. 7B is a front view thereof, FIG. 7C is a longitudinal sectional view taken along line EE, and FIG. It is a side view.
FIGS. 8A and 8B show another cable gripping fitting used in the present invention, wherein FIG. 8A is a plan view, FIG. 8B is a front view, FIG. 8C is a longitudinal sectional view taken along line FF, and FIG. It is a longitudinal cross-sectional view in the GG line.
FIG. 9 is a longitudinal sectional view showing a part of the separated state in another embodiment of the present invention.
10 shows the core wire container of the example of FIG. 9, wherein (a) is a plan view thereof, (b) is a longitudinal sectional view taken along the line CC, and (c) is a side view thereof.
11 is an enlarged detail view of a part of the example of FIG. 10, in which (a) is a plan view, (b) is a front view, and (c) is a longitudinal sectional view taken along line DD.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cable penetration hole 2 Base member 3 Cover member 4 Core wire container 5 Support member 6, 7, 8 Tension member holding tool 10 Closure 11 Bush 12 Locking piece 13 Locked part 14 Locking part 15 Cable seal cap 16 Slit DESCRIPTION OF SYMBOLS 20 Cylindrical fitting part 21 Locked part 22 Locking piece 24 Sealing member 25 Seal cap 30 Locking part 40 Core wire connection part storage part 41 Core wire extra length storage part 42 Core wire extra length winding part 43 Accommodation part 44 Flat tray 45 Bracket 46 Connecting pin

Claims

A base case in which a plurality of cable insertion holes are formed and a cap-shaped cover member constitute a closure case, and a connection portion in which connection ends of a plurality of cables are respectively connected in the closure case, and the connection portion In the cable connection closure provided with the core wire housing body that includes the extra length portion of the core wire,
By fitting a bush made of a rubber-like elastic material is communicated transmural the cable to the bush in the cable insertion hole of the base member, the locked portion is formed around the cable insertion hole to the outer surface of the base member The locking piece is erected so as to be elastically bendable, and a cable seal cap formed with a locking portion for locking to the locked portion of the locking piece is detachably provided and elastically contacted with the bush. While locking the locking portion to the locked portion of the locking piece,
A plurality of locking pieces in which a cylindrical fitting portion capable of fitting the opening end of the cover member is formed on the inner surface of the base member, and a locked portion is formed on the radially outer side of the cylindrical fitting portion. And a plurality of locking portions that can be locked to the locked portions of the locking pieces are formed on the cover member. A seal member that elastically contacts the cover member is provided on the inner periphery, and further, a core wire container is rotatably connected via a support member provided on the base member, and the core wire connection part is stored in each core wire container. The cable connection closure is characterized in that a cable section and a core wire extra length storage section are formed.

The base member includes a tension member gripping tool, the locked portion of the locking piece is a locking hole, and the locking claw that can lock the locking portion of the cap member in the hole, the cover member The cable connection closure according to claim 1, wherein the locking portion is a locking claw having an inclined surface at an insertion direction edge and a circumferential edge.

The cable seal cap of the previous period has a cylindrical body, and its locking part is a locking hole or mounting hole. The cable seal cap is detachably fitted to the locked part of the locking piece around the cable insertion hole of the previous period. The closure according to claim 1 or 2, wherein the bush is elastically contacted with the cable.

The core wire container is detachable from a support body attached to the base member via a connecting pin with a flat tray having a core wire extra length winding part and a single core connection part housing part, and 4. A closure according to claim 1, 2 or 3, wherein a plurality of the pivots are rotatably provided.

The closure according to claim 1, 2, 3, or 4, wherein the core wire container is a flat case, and includes a core wire extra length storage portion on one side, and in particular, a core wire connection portion storage portion on the other side.

The said core wire container is storage goods for cable drops, Comprising: The core wire extra length winding part and the accommodating part of the single core connection part were divided and arranged together, Claim 1, 2, 3 or 4 closure.