JP4026244B2 - Optical termination - Google Patents

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JP4026244B2
JP4026244B2 JP26544698A JP26544698A JP4026244B2 JP 4026244 B2 JP4026244 B2 JP 4026244B2 JP 26544698 A JP26544698 A JP 26544698A JP 26544698 A JP26544698 A JP 26544698A JP 4026244 B2 JP4026244 B2 JP 4026244B2
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optical
optical fiber
cord
extra length
tray
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JP2000098138A (en
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一郎 松浦
和人 斎藤
敏行 渡邊
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Sumitomo Electric Industries Ltd
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Sumitomo Electric Industries Ltd
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Description

【０００１】
【発明の属する技術分野】
本発明は、光ファイバネットワークにおいて、一側（例えば加入者側）の光ケーブルと他側（例えば局側）の光ケーブルとの光コネクタ接続に利用するための光成端架に関するものである。
【０００２】
【従来の技術】
従来、このような分野の技術として、特開平９−５５３３号公報がある。この公報に記載された光成端架の上段側には、多数の光分岐モジュールを並設させた状態で配置させ、この下段側には、各光分岐モジュールから排出させた光ファイバコードと光ケーブルから延びる光ファイバとの光接続に利用するＭＴコネクタを収容するための光コネクタ収容ケースが配置されている。そして、ボックス状の光コネクタ収容ケース内には、多数のＭＴコネクタが段積みされた状態で収容され、しかも、光コネクタ収容ケース内で、多数の光ファイバコード及び光ケーブル側光ファイバがループ状に巻かれるようにして余長収容されている。従って、このようなボックス状光コネクタ収容ケースを利用すると、ＭＴコネクタの接続切替を行う際、所望のＭＴコネクタを簡単に取り出すことができ、しかも、ケース内に光ファイバの余長を形成することもでき、ＭＴコネクタの接続切替作業を効率よく、確実に行うことができる。
【０００３】
【発明が解決しようとする課題】
しかしながら、前述した従来の光成端架には、次のような課題が存在していた。すなわち、光成端架内に配置させた光分岐モジュールは、引出し自在に構成されているが、光コネクタ収容ケースは、光成端架内で据え付け固定させた状態になっている。よって、光コネクタ収容ケースから所望のＭＴコネクタを取り出すことを考慮し、ケースの上方に作業者の手が入る程度の作業空間が必要となり、光分岐モジュールと光コネクタ収容ケースとを離して配置させる必要があり、その結果、架内の空間利用効率が悪化する。このことは、光分岐モジュールと光コネクタ収容ケースとを架内で多段構造にする際、光成端架が大型化するといった問題点があった。
【０００４】
本発明は、上述の課題を解決するためになされたもので、特に、光コネクタの取り出しの容易化を図りつつ、余長収容トレーの設置スペースの効率化をも図った光成端架を提供することを目的とする。
【０００５】
【課題を解決するための手段】
請求項１に係る本発明の光成端架は、第１側の光ケーブルから延び出る多心光ファイバを光コネクタ接続により、第２側の光ケーブルから延び出る単心光ファイバへ分岐接続させるために、第１側の光ケーブルと第２側の光ケーブルとの結線上に光分岐モジュールを配置させ、光分岐モジュールを、枠体内で並設させて光分岐モジュール群として構成させた光成端架において、
光分岐モジュールから導出させた光ファイバコードと第１側の光ケーブルから延び出る多心光ファイバとを光コネクタを介して接続させ、光コネクタを収容すると同時に、光コネクタから延びる光ファイバコードと多心光ファイバとの余長をも収容する余長収容トレーを、枠体内で光分岐モジュール群の上方又は下方に配置し、余長収容トレーは、引出し手段を介して枠体内で取付けられ、
余長収容トレー内には、仕切片により形成した光ファイバコード用の第１の余長経路と多心光ファイバ用の第２の余長経路とが設けられ、
余長収容トレー内には、複数の光コネクタを並設させて収容する光コネクタ収容部を有し、第１の余長経路のコード排出口に、光コネクタ収容部の一端側に位置するＲ形状のガイド部を配置させ、
余長収容トレーの前部には、枠体内における各光分岐モジュールの位置に対応して一列に整列させた光ファイバ挿入溝が形成され、余長収容トレー内には、光コネクタ収容部が光ファイバ挿入溝の配列方向に対して平行に延在し、第１の余長経路は、光ファイバ挿入溝の一方の整列端側に位置するコード導入口から光コネクタ収容部の後方側を這い回されて、光ファイバ挿入溝の他方の整列端側に位置するコード排出口に向けて延在することを特徴とする。
【０００６】
この光成端架においては、枠体内で光分岐モジュールを並設させており、各光分岐モジュールからは光ファイバコードが導出され、各光ファイバコードは余長収容トレー内に導かれ、余長収容トレー内には、第１側の光ケーブルから延び出た多心光ファイバも導かれている。更に、各余長収容トレー内には、光ファイバコードと多心光ファイバとをそれぞれ連結させるための光コネクタが収容されている。このような余長収容トレーは、光分岐モジュールの上方又は下方のいずれかに配置されることになるが、光分岐モジュールと余長収容トレーとを接近させても、余長収容トレーを引き出すようにしているため、余長収容トレー内の光コネクタを外部に簡単に取り出すことができる。このことは、光コネクタの接続切替作業の容易化及び作業効率の向上を達成するものであり、余長収容トレーの設置スペースの効率化を図る上で有効な手段となる。特に、前述した構成は、光分岐モジュールと余長収容トレーとを多段に積み上げるような光成端架に有益である。
【０００７】
さらに、余長収容トレー内には、仕切片により形成した光ファイバコード用の第１の余長経路と、多心光ファイバ用の第２の余長経路とが設けられていると好ましい。このような構成を採用した場合、各余長経路が仕切片により形成される結果、光ファイバコードと多心光ファイバとが適切に分離収容されて、別経路上で引き回され、余長収容トレー内での混線防止に寄与する。従って、余長収容トレーから光コネクタを取り出す際や、余長収容トレー内に光コネクタを戻す際の作業性の向上に寄与する。
【０００８】
さらに、余長収容トレー内には、複数の光コネクタを並設させて収容する光コネクタ収容部を有し、第１の余長経路のコード排出口に、光コネクタ収容部の一端側に位置するＲ形状のガイド部を配置させると好ましい。このような構成を採用した場合、光コネクタを光コネクタ収容部に装填させた状態において、第１の余長経路から排出させた光ファイバコードの曲げ半径を、光コネクタ収容部の端部近傍で、Ｒ形状のガイド部によって確保することができる。従って、コード排出口から導出させた光ファイバコードを、コード排出口近くの光ファイバ収容部に導く場合でも、光ファイバの安定した曲げ形状の確保が図られることになる。
【０００９】
さらに、余長収容トレーの前部には、枠体内における各光分岐モジュールの位置に対応して一列に整列させた光ファイバ挿入溝が形成され、余長収容トレー内には、光コネクタ収容部が光ファイバ挿入溝の配列方向に対して平行に延在し、第１の余長経路は、光ファイバ挿入溝の一方の整列端側に位置するコード導入口から光コネクタ収容部の後方側を這い回されて、光ファイバ挿入溝の他方の整列端側に位置するコード排出口に向けて延在すると好ましい。このような構成を採用した場合、各光ファイバ挿入溝に各光ファイバコードを挿入させることにより、余長収容トレーの前部で光ファイバコードの途中を一本ずつ整列させることができる。また、コード導入口から最も離れた光ファイバ挿入溝に差し入れられた光ファイバコードから順に、光ファイバコードの光コネクタを、コード排出口に最も近い光コネクタ収容部の端から順次配置させることが可能となる。すなわち、コード排出口に近い光ファイバ挿入溝に差し入れられた光ファイバコードから順に、各光コネクタは、光コネクタ収容部のコード排出口に近い側から順次収容させると、各光分岐モジュールから延び出たそれぞれの光ファイバコードの長さを揃えた場合でも、各光ファイバコードを余長収容トレー内に無理なく収容することができる。そして、光分岐モジュールから導出させる光ファイバコードの長さが揃えられる結果、光成端架内で採用される多数の光分岐モジュールの画一化が達成され、光成端架に各光分岐モジュールを組付ける作業が極めて簡単になる。
【００１０】
請求項２記載の光成端架に関し、第２の余長経路の多心光ファイバ排出口に、光コネクタ収容部の他端側に位置するＲ形状のガイド部を配置させると好ましい。このような構成を採用した場合、光コネクタを光コネクタ収容部に装填させた状態において、第２の余長経路から排出させた多心光ファイバの曲げ半径を、光コネクタ収容部の端部近傍で、Ｒ形状のガイド部によって確保することができる。従って、テープ排出口から導出させた多心光ファイバを、テープ排出口近くの光ファイバ収容部に導く場合でも、光ファイバの安定した曲げ形状の確保が図られることになる。
【００１１】
請求項３記載の光成端架に関し、引出し手段は、引き出された余長収容トレーの前端が下方に向けて回転するように、余長収容トレーと枠体との間に設けられていると好ましい。このような構成を採用した場合、余長収容トレーを引き出す際、その前端が下方に向けて回転する結果、余長収容トレーの上面を作業者側に向けることができ、余長収容トレー内に収容した光コネクタへのアクセスが容易になる。
【００１２】
【発明の実施の形態】
以下、図面と共に本発明による光成端架の好適な実施形態について詳細に説明する。
【００１３】
図１は、本発明に係る光成端架を示す正面図である。同図に示された光成端架１は、光配線モジュール（ＦＴＭ）と呼ばれるものであり、この光成端架１は、加入者側（第１側）の光ケーブル２から導出させた多数の多心光ファイバ（以下「テープファイバ」という）３と、局側（第２側）の光ケーブル４から導出させた多数の単心光ファイバ５とを、それぞれ対応させて接続させるためのものである。
【００１４】
この光成端架１の枠体（キャビネット）６には、図１及び図２に示すように、内部にカプラ７等を収容した光分岐モジュール８が配置され、光分岐モジュール８は、棚９ａ上で横一列に並べられるようにして光分岐モジュール群１０を構成する。また、各光分岐モジュール８は、棚９ａ上に例えば５０本並べられ、ガイドレール（図示せず）を介して枠体６内で引出し自在に収容されている。光分岐モジュール群１０の下方には、棚９ｃ上に光スイッチ（心線選択手段）Ｓが設置され、カプラ７に接続させた分岐心線Ｇを光スイッチＳ内に導いている。なお、この光スイッチＳは、ＯＴＤＲ等の測定機器Ｋに接続される。
【００１５】
図２に示すように、各光分岐モジュール８の後端部８ｂには、光ケーブル４の各単心光ファイバ５の先端に設けられた光コネクタ１１を差し込むためのコネクタ差込み部Ｃが設けれている。各光分岐モジュール８は、コネクタ差込み部Ｃから延びる単心の光ファイバコード１２を４本有し、各光ファイバコード１２は、光分岐モジュール８内を通って前端部８ａから外部に導出する。そして、光分岐モジュール８から導出させた各光ファイバコード１２は、一括した状態で第１の光コネクタ（ＭＴコネクタ）１３に取付けられている。よって、一本の光分岐モジュール８は、一個の光コネクタ１３を有することになり、前述した光分岐モジュール群１０においては、光分岐モジュール８の個数（例えば５０本）に対応する第１の光コネクタ１３が存在することになる。
【００１６】
また、各第１の光コネクタ１３は、加入者側の光ケーブル２のテープファイバ３の先端に設けられた各第２の光コネクタ（ＭＴコネクタ）１４に対して、図示しないガイドピンを介して接続される。なお、第１の光コネクタ１３と第２の光コネクタ１４との光接続を、光分岐モジュール８の外部で行うように構成した理由は、光コネクタ１３，１４同士の接続切替作業の簡易化と、接続切替作業時において、光分岐モジュール８内のカプラ７等に触れないようにして、光分岐モジュール８内の部品の損傷を回避させるためである。
【００１７】
このように、第１の光コネクタ１３と第２の光コネクタ１４とからなる光接続ユニット１５が、光分岐モジュール８の外部にあるため、光成端架１の枠体６内には、多数の光コネクタ１３，１４を一括収容するための余長収容トレー１６を設置させている。この余長収容トレー１６は、図１及び図３に示すように、棚９ｂ上で光分岐モジュール群１０の上方に設置されている。そして、余長収容トレー１６内で、多数（例えば５０組）の光接続ユニット１５は横一列に並べられている。また、余長収容トレー１６は、光コネクタ１３，１４を収容することは勿論のこと、光コネクタ１３から延びる光ファイバコード１２と光コネクタ１４から延びるテープファイバ３との余長を収容するものである。
【００１８】
図３及び図４に示すように、余長収容トレー１６の前端部には、枠体６内における各光分岐モジュール８の配列方向に対応して、一列に整列させた光ファイバ引掛け片１８が設けられている。そして、隣接する光ファイバ引掛け片１８の間に形成した光ファイバ挿入溝１９は、各光分岐モジュール８に一対一で対応するように整列させている。また、余長収容トレー１６の底板１６Ａ上には、光ファイバコード１２の余長を確保するための第１の余長経路Ｐと、テープファイバ３の余長を確保するための第２の余長経路Ｑとが設けられている。更に、余長収容トレー１６の底板１６Ａ上には、各光ファイバコード１２の光コネクタ１３及び各テープファイバ３の光コネクタ１４を整列配置させるためのボックス状の光コネクタ収容部２０が設けられ、この光コネクタ収容部２０は、光ファイバ挿入溝１９の配列方向に対し平行に延在する。そして、余長収容トレー１６の上面は開放されているが、蓋があってもよい。
【００１９】
また、余長収容トレー１６の底板１６Ａ上において、第１の余長経路Ｐは、光ファイバ挿入溝１９の整列方向における一端側に位置するコード導入口２２から、光コネクタ収容部２０の後方側を通り、光ファイバ挿入溝１９の整列方向における他端側に位置するコード排出口２３まで延在する。そして、コード排出口２３は、光コネクタ収容部２０の前方に形成させたコード収容空間Ａに臨ませている。この場合の余長経路Ｐは、余長収容トレー１６の底板１６Ａの輪郭に沿って延在する外側の仕切片２４と、外側の仕切片２４から所定間隔だけ離させて延在する内側の仕切片２５との間に形成され、コード導入口２２からコード排出口２３にかけて、底板１６Ａ上で略Ｕ字形状をなしている。そして、余長収容トレー１６の底板１６Ａ上において、コード排出口２３には、光コネクタ収容部２０の一端側に位置するＲ形状のガイド部２６が設けられている。このガイド部２６の半径を３０ｍｍ以上にすることで、光ファイバコード１２の最小曲げ半径が確保されることになる。
【００２０】
このような構成を採用した場合、コード導入口２２から最も離れた光ファイバ挿入溝１９に挿入させた光ファイバコード１２Ａは、光ファイバ挿入溝１９の後方でその配列方向に平行に延在する仕切片２７に沿ってコード導入口２２まで導かれる。そして、光ファイバコード１２Ａは、第１の余長経路Ｐに沿ってコード排出口２３まで引き回された後、ガイド部２６に沿わせるようにして、コード排出口２３に最も近い光コネクタ収容部２０の端に導かれる。そして、光ファイバコード１２Ａの光コネクタ１３Ａを、コード排出口２３側の光コネクタ収容部２０の端に実装させる。
【００２１】
これに対して、コード導入口２２に最も近い光ファイバ挿入溝１９に挿入させた光ファイバコード１２Ｂはコード導入口２２まで最短で導かれる。そして、光ファイバコード１２Ｂは、第１の余長経路Ｐに沿ってコード排出口２３まで引き回された後、ガイド部２６に沿わせるようにして、コード排出口２３から最も遠い光コネクタ収容部２０の端に導かれる。そして、光ファイバコード１２Ｂの光コネクタ１３Ｂは、コード導入口２２側の光コネクタ収容部２０の端に実装される。
【００２２】
すなわち、各光分岐モジュール８から導出させる光ファイバコード１２の長さを揃えた場合、光ファイバ挿入溝１９に差し込まれた各光ファイバコード１２の光コネクタ１３は、コード導入口２２から遠い順に、光コネクタ収容部２０のコード排出口２３側の端から順次並べられる。よって、画一的な長さをもつ各光ファイバコード１２を無理なく余長収容トレー１６内に収容することができる。そして、光分岐モジュール８から導出させる光ファイバコード１２の長さが揃えられる結果、光成端架１内で採用される多数の光分岐モジュール８の全てを画一化することができ、光成端架１に光分岐モジュール８を組付ける際の作業効率がアップする。
【００２３】
また、テープファイバ３の余長を確保するための第２の余長経路Ｑは、光ファイバ挿入溝１９の整列方向における一端側でコード導入口２２に対向して設けられたテープ導入口２８と、コード排出口２３に対向して、光ファイバ挿入溝１９の整列方向における他端側に位置するテープ排出口（多心光ファイバ排出口）２９と間で、略Ｌ字形状をなして延在する。このテープ排出口２９は、光コネクタ収容部２０の後方に形成させたテープ収容空間Ｂに臨ませ、第２の余長経路Ｑのテープ排出口２９には、光コネクタ収容部２０の他端側に位置するＲ形状のガイド部３０が設けられている。
【００２４】
このガイド部３０の半径を３０ｍｍ以上にすることで、テープファイバ３の最小曲げ半径が確保されることになる。そして、余長経路Ｑは、前述した仕切片２７と、この仕切片２７に対して平行に延在しながらＬ字形に曲げられた仕切片３１とによって作り出されている。そして、各テープファイバ３に設けられた光コネクタ１４を、光コネクタ収容部２０内に収容させた場合、各テープファイバ３は、第２の余長経路Ｑ内を引き回されて、外部に排出される。
【００２５】
ここで、図５及び図６に示すように、余長収容トレー１６と枠体６との間には、光コネクタ１３と１４との接続切替作業の効率化を図るようした引出し手段３３が設けられている。この引出し手段３３は、余長収容トレー１６の両側面１６ａから突出して水平方向に延在する左右一対のスライダー３４と、このスライダー３４を上下から挟むように枠体６から突出させて水平方向に延在する左右一対のガイドレール３５とからなる。従って、余長収容トレー１６は、スライダー３４とガイドレール３５との協働により水平方向に引き出されることになる。このように、余長収容トレー１６が作業者側に引き出される結果、余長収容トレー１６の開放端側から光コネクタ１３，１４へのアクセスが容易になる。
【００２６】
また、他の引出し手段３７は、図７に示すように、余長収容トレー１６を引き出した状態で、その前端を下方に向けて回転させる構成を有し、余長収容トレー１６の立て掛け配置を可能にする。具体的に、引出し手段３７は、図８及び図９に示すように、余長収容トレー１６の両側面１６ａに設けられた左右一対のローラ３８と、このローラ３８を上下から挟むように水平方向に延在させて枠体６に固定した左右一対のガイドレール３９とからなる。更に、ローラ３８は、前部ローラ３８ａと中間ローラ３８ｂと後部ローラ３８ｃとからなり、それぞれのローラ３８ａ，３８ｂ，３８ｃはガイドレール３９に沿って水平方向に配列され、ガイドレール３９は、上側のガイドレール３９ａと下側のガイドレール３９ｂとからなり、上下のガイドレール３９ａ，３９ｂの間をローラ３８が移動する。
【００２７】
そして、下側のガイドレール３９ｂにおいて、その前端部には、中間ローラ３８ｂの落下を可能にするドロップ穴４０が設けられ、このドロップ穴４０の後方には、後部ローラ３８ｃを受け入れて後部ローラ３８ｃのの回転を支持するための軸受け部４１が設けられている。この軸受け部４１は、半円筒形状をなして、後部ローラ３８ｃの受け皿として機能する。また、上側及び下側のガイドレール３９ａ，３９ｂの先端には、内側に向けて突出するストッパ片４２ａ，４２ｂがそれぞれ設けられ、ストッパ片４２ａとストッパ片４２ｂとの間には、前部ローラ３８ａの通過を許容するローラ出入口４３が設けられている。従って、ストッパ片４２ａと４２ｂとからなる前端ストッパ４２によって、前部ローラ３８ａは、ガイドレール３９から飛び出しにくくなっており、余長収容トレー１６の抜け落ち防止に寄与する。なお、符号５０は後端ストッパである。
【００２８】
そこで、図１０及び図１１に示すように、余長収容トレー１６を手前に引き出すと、各ローラ３８がガイドレール３９に沿って移動しながら、ローラ出入口４３から前部ローラ３８ａが飛び出す。続いて、ドロップ穴４０から中間ローラ３８ｂが落ち出ると同時に、後部ローラ３８ｃが軸受け部４１内に落ち込む。その結果、後部ローラ３８ｃを回転軸として余長収容トレー１６が回転し、図７に示すように、余長収容トレー１６の開放上面を作業者側に向けるような立て掛け配置が達成される。
【００２９】
本発明に係る光成端架は、前述した実施形態に限定されるものではなく、余長収容トレー１６を光分岐モジュール群１０の下方に配置させてよく、この場合に、余長収容トレー１６は引出し自在に構成される結果、余長収容トレー１６を、光分岐モジュール群１０に近接配置させることが可能になる。
【００３０】
【発明の効果】
本発明による光成端架は、以上のように構成されているため、次のような効果を得る。すなわち、第１側の光ケーブルから延び出る多心光ファイバを光コネクタ接続により、第２側の光ケーブルから延び出る単心光ファイバへ分岐接続させるために、第１側の光ケーブルと第２側の光ケーブルとの結線上に光分岐モジュールを配置させ、光分岐モジュールを、枠体内で並設させて光分岐モジュール群として構成させた光成端架において、
光分岐モジュールから導出させた光ファイバコードと第１側の光ケーブルから延び出る多心光ファイバとを光コネクタを介して接続させ、光コネクタを収容すると同時に、光コネクタから延びる光ファイバコードと多心光ファイバとの余長をも収容する余長収容トレーを、枠体内で光分岐モジュール群の上方又は下方に配置し、余長収容トレーは、引出し手段を介して枠体内で取付けられ、
余長収容トレー内には、仕切片により形成した光ファイバコード用の第１の余長経路と多心光ファイバ用の第２の余長経路とが設けられ、
余長収容トレー内には、複数の光コネクタを並設させて収容する光コネクタ収容部を有し、第１の余長経路のコード排出口に、光コネクタ収容部の一端側に位置するＲ形状のガイド部を配置させ、
余長収容トレーの前部には、枠体内における各光分岐モジュールの位置に対応して一列に整列させた光ファイバ挿入溝が形成され、余長収容トレー内には、光コネクタ収容部が光ファイバ挿入溝の配列方向に対して平行に延在し、第１の余長経路は、光ファイバ挿入溝の一方の整列端側に位置するコード導入口から光コネクタ収容部の後方側を這い回されて、光ファイバ挿入溝の他方の整列端側に位置するコード排出口に向けて延在するので、光コネクタの取り出しの容易化を可能にしつつ、余長収容トレーの設置スペースの効率化を可能にする。
【図面の簡単な説明】
【図１】本発明に係る光成端架の一実施形態を示す正面図である。
【図２】図１に示した光成端架内での結線状態を示す概略図である。
【図３】余長収容トレーと光分岐モジュール群と光スイッチとの三者を一ユニットとして、枠体内で縦積み配置させた状態を示す斜視図である。
【図４】余長収容トレーを示す平面図である。
【図５】余長収容トレーを水平方向に引き出した状態を示す側面図である。
【図６】引出し手段の第１の変形例を示す要部拡大図である。
【図７】余長収容トレーを斜めに立て掛けた状態を示す側面図である。
【図８】引出し手段の第２の変形例を示す斜視図である。
【図９】図８の要部拡大側面図である。
【図１０】図８に示された余長収容トレーを引き出した状態を示す斜視図である。
【図１１】図９に示された余長収容トレーが水平状態から斜めに傾けられるときの状態を示す要部拡大側面図である。
【符号の説明】
Ｐ…第１の余長経路、Ｑ…第２の余長経路、１…光成端架、２…第１側の光ケーブル、３…テープファイバ（多心光ファイバ）、４…第２側の光ケーブル、５…単心光ファイバ、６…枠体、８…光分岐モジュール、１０…光分岐モジュール群、１２…光ファイバコード、１３，１４…光コネクタ、１６…余長収容トレー、１９…光ファイバ挿入溝、２０…光コネクタ収容部、２２…コード導入口、２３…コード排出口、２４，２５，２７，３１…仕切片、２６，３０…ガイド部、２９…テープ排出口（多心光ファイバ排出口）、３３，３７…引出し手段。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an optical termination for use in optical connector connection between an optical cable on one side (for example, a subscriber side) and an optical cable on the other side (for example, a station side) in an optical fiber network.
[0002]
[Prior art]
Conventionally, there is JP-A-9-5533 as a technology in such a field. An optical fiber cable and an optical cable discharged from each optical branch module are arranged on the upper side of the optical termination described in this publication in a state where a large number of optical branch modules are arranged in parallel. An optical connector housing case for housing an MT connector used for optical connection with an optical fiber extending from the optical fiber is disposed. In the box-shaped optical connector housing case, a large number of MT connectors are housed in a stacked state, and in the optical connector housing case, a large number of optical fiber cords and optical fiber on the optical cable side are looped. The extra length is accommodated as if it were wound. Therefore, when such a box-shaped optical connector housing case is used, when switching the connection of the MT connector, the desired MT connector can be easily taken out, and an extra length of the optical fiber is formed in the case. The MT connector connection switching operation can be performed efficiently and reliably.
[0003]
[Problems to be solved by the invention]
However, the conventional optical termination described above has the following problems. That is, the optical branching module disposed in the optical termination frame is configured to be freely drawn out, but the optical connector housing case is installed and fixed in the optical termination frame. Therefore, in consideration of taking out a desired MT connector from the optical connector housing case, a work space is required so that an operator's hand can be placed above the case, and the optical branching module and the optical connector housing case are arranged separately. As a result, the space utilization efficiency in the rack deteriorates. This has the problem that when the optical branching module and the optical connector housing case are formed in a multistage structure in the rack, the optical termination rack is enlarged.
[0004]
The present invention has been made in order to solve the above-described problems, and in particular, provides an optical termination that facilitates removal of the optical connector and increases the installation space of the extra length accommodation tray. The purpose is to do.
[0005]
[Means for Solving the Problems]
The optical termination of the present invention according to claim 1 is for branching and connecting a multi-core optical fiber extending from an optical cable on the first side to a single-core optical fiber extending from the optical cable on the second side by optical connector connection. In the optical termination rack in which the optical branch module is arranged on the connection between the first side optical cable and the second side optical cable, and the optical branch module is arranged in parallel in the frame and configured as a group of optical branch modules.
An optical fiber cord led out from the optical branching module and a multi-core optical fiber extending from the first-side optical cable are connected via an optical connector to accommodate the optical connector and at the same time, an optical fiber cord extending from the optical connector and the multi-core An extra-length accommodating tray that also accommodates an extra length with the optical fiber is disposed above or below the optical branching module group in the frame, and the extra-length accommodating tray is attached in the frame via the drawing means ,
In the extra length accommodation tray, a first extra length path for an optical fiber cord formed by a partition piece and a second extra length path for a multi-core optical fiber are provided,
The surplus length accommodating tray has an optical connector accommodating portion for accommodating a plurality of optical connectors side by side, and is located at one end side of the optical connector accommodating portion at the cord discharge port of the first extra length path. Place the shape guide part,
An optical fiber insertion groove aligned in a line corresponding to the position of each optical branching module in the frame is formed in the front part of the extra length accommodation tray. The first extra length path extends around the rear side of the optical connector housing portion from the cord inlet located on one aligned end side of the optical fiber insertion groove. And extending toward the cord discharge port located on the other aligned end side of the optical fiber insertion groove .
[0006]
In this optical termination frame, optical branching modules are juxtaposed in the frame, optical fiber cords are led out from each optical branching module, and each optical fiber cord is led into a surplus length accommodation tray, A multi-core optical fiber extending from the first-side optical cable is also led into the storage tray. Furthermore, optical connectors for connecting the optical fiber cord and the multi-core optical fiber are accommodated in each extra-length accommodating tray. Such an extra-length storage tray is arranged either above or below the optical branching module. Even if the optical branching module and the extra-length storage tray are brought close to each other, the extra-length storage tray is pulled out. Therefore, the optical connector in the extra length accommodation tray can be easily taken out. This achieves facilitating the switching operation of the optical connector and improving the working efficiency, and is an effective means for improving the efficiency of the installation space for the extra length accommodation tray. In particular, the above-described configuration is useful for optical terminations in which the optical branching module and the extra length accommodation tray are stacked in multiple stages.
[0007]
Furthermore, it is preferable that a first extra length path for an optical fiber cord formed by a partition piece and a second extra length path for a multi-core optical fiber are provided in the extra length accommodation tray. When such a configuration is adopted, each extra length path is formed by a partition piece. As a result, the optical fiber cord and the multi-core optical fiber are appropriately separated and accommodated, and are routed on another path to accommodate the extra length. Contributes to preventing crosstalk in the tray. Therefore, when taking out the optical connector from the extra length accommodation tray or returning the optical connector into the extra length accommodation tray, it contributes to improvement in workability.
[0008]
Furthermore, the surplus length accommodating tray has an optical connector accommodating portion for accommodating a plurality of optical connectors side by side, and is positioned at one end side of the optical connector accommodating portion at the cord discharge port of the first extra length path. It is preferable to arrange an R-shaped guide portion. When such a configuration is adopted, the bending radius of the optical fiber cord discharged from the first extra length path in the state in which the optical connector is loaded in the optical connector housing portion is set near the end of the optical connector housing portion. It can be secured by the R-shaped guide portion. Therefore, even when the optical fiber cord led out from the cord outlet is led to the optical fiber housing near the cord outlet, it is possible to secure a stable bent shape of the optical fiber.
[0009]
Further, an optical fiber insertion groove aligned in a line corresponding to the position of each optical branching module in the frame is formed in the front part of the extra length accommodation tray, and the optical connector accommodation part is arranged in the extra length accommodation tray. Extends in parallel with the arrangement direction of the optical fiber insertion grooves, and the first extra-length path extends from the cord introduction port located on one aligned end side of the optical fiber insertion grooves to the rear side of the optical connector housing portion. It is preferable that the cable is wound around and extends toward the cord discharge port located on the other aligned end side of the optical fiber insertion groove. When such a configuration is adopted, by inserting each optical fiber cord into each optical fiber insertion groove, it is possible to align the middles of the optical fiber cords one by one at the front portion of the extra length accommodation tray. Also, in order from the optical fiber cord inserted into the optical fiber insertion groove farthest from the cord introduction port, the optical connector of the optical fiber cord can be sequentially arranged from the end of the optical connector housing portion closest to the cord discharge port. It becomes. That is, in order from the optical fiber cord inserted into the optical fiber insertion groove close to the cord outlet, each optical connector is extended from each optical branch module when sequentially received from the side near the cord outlet of the optical connector housing. Even when the lengths of the respective optical fiber cords are equalized, the respective optical fiber cords can be accommodated without difficulty in the extra-length accommodating tray. As a result, the lengths of the optical fiber cords led out from the optical branching modules are made uniform, so that the uniformization of a large number of optical branching modules employed in the optical termination rack is achieved. The work of assembling is extremely easy.
[0010]
Related to Mitsunari tanker according to claim 2, in the multi-fiber optical fiber outlet of the second extra length path and to place the guide portion of the R-shape which is located on the other end side of the optical connector housing section preferred. When such a configuration is adopted, the bending radius of the multi-core optical fiber discharged from the second extra length path in the state in which the optical connector is loaded in the optical connector housing portion is set near the end of the optical connector housing portion. Thus, it can be secured by the R-shaped guide portion. Therefore, even when the multi-core optical fiber led out from the tape discharge port is guided to the optical fiber housing near the tape discharge port, a stable bent shape of the optical fiber can be ensured.
[0011]
Related to Mitsunari tanker according to claim 3, drawer unit, the front end of the extra length accommodating tray drawn is provided between so as to rotate downward, the extra length accommodating tray and the frame And preferred. When such a configuration is adopted, when pulling out the extra length storage tray, the front end rotates downward, so that the upper surface of the extra length storage tray can be directed to the operator side, Access to the accommodated optical connector is facilitated.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the optical termination according to the present invention will be described in detail with reference to the drawings.
[0013]
FIG. 1 is a front view showing an optical termination according to the present invention. The optical termination 1 shown in the figure is called an optical wiring module (FTM), and this optical termination 1 is made up of a number of optical cables 2 led out from the optical cable 2 on the subscriber side (first side). A multi-core optical fiber (hereinafter referred to as “tape fiber”) 3 and a large number of single-core optical fibers 5 led out from the optical cable 4 on the station side (second side) are connected in correspondence with each other. .
[0014]
As shown in FIGS. 1 and 2, an optical branching module 8 containing a coupler 7 and the like is disposed inside the frame (cabinet) 6 of the optical termination 1, and the optical branching module 8 includes a shelf 9a. The optical branching module group 10 is configured so as to be arranged in a horizontal row. Each of the optical branching modules 8 is arranged, for example, 50 on the shelf 9a, and is housed in the frame 6 via a guide rail (not shown) so as to be drawn out. Below the optical branching module group 10, an optical switch (core selection unit) S is installed on the shelf 9 c, and a branch core G connected to the coupler 7 is guided into the optical switch S. The optical switch S is connected to a measuring device K such as OTDR.
[0015]
As shown in FIG. 2, the rear end portion 8b of each optical branch module 8 is provided with a connector insertion portion C for inserting an optical connector 11 provided at the front end of each single-core optical fiber 5 of the optical cable 4. Yes. Each optical branching module 8 has four single-core optical fiber cords 12 extending from the connector insertion portion C, and each optical fiber cord 12 passes through the optical branching module 8 and is led out from the front end 8a. The optical fiber cords 12 led out from the optical branching module 8 are attached to a first optical connector (MT connector) 13 in a collective state. Therefore, one optical branching module 8 has one optical connector 13. In the optical branching module group 10 described above, the first light corresponding to the number of optical branching modules 8 (for example, 50). The connector 13 exists.
[0016]
Each first optical connector 13 is connected to each second optical connector (MT connector) 14 provided at the end of the tape fiber 3 of the optical cable 2 on the subscriber side via a guide pin (not shown). Is done. The reason why the optical connection between the first optical connector 13 and the second optical connector 14 is performed outside the optical branching module 8 is that the connection switching operation between the optical connectors 13 and 14 is simplified. This is for avoiding damage to parts in the optical branch module 8 by not touching the coupler 7 in the optical branch module 8 during the connection switching operation.
[0017]
As described above, since the optical connection unit 15 including the first optical connector 13 and the second optical connector 14 is outside the optical branching module 8, a large number of optical connection units 15 are provided in the frame 6 of the optical termination frame 1. The extra length accommodation tray 16 for collectively accommodating the optical connectors 13 and 14 is installed. As shown in FIGS. 1 and 3, the extra length accommodation tray 16 is installed above the optical branching module group 10 on the shelf 9 b. In the surplus length accommodation tray 16, a large number (for example, 50 sets) of optical connection units 15 are arranged in a horizontal row. The extra length accommodation tray 16 accommodates the extra length of the optical fiber cord 12 extending from the optical connector 13 and the tape fiber 3 extending from the optical connector 14 as well as the optical connectors 13 and 14. is there.
[0018]
As shown in FIGS. 3 and 4, the front end of the extra-length accommodating tray 16 has optical fiber hooks 18 aligned in a line corresponding to the arrangement direction of the optical branching modules 8 in the frame 6. Is provided. The optical fiber insertion grooves 19 formed between the adjacent optical fiber hooks 18 are aligned so as to correspond to the respective optical branching modules 8 on a one-to-one basis. Further, on the bottom plate 16A of the surplus length accommodation tray 16, a first surplus length path P for securing the surplus length of the optical fiber cord 12 and a second surplus length for securing the surplus length of the tape fiber 3 are provided. A long path Q is provided. Further, on the bottom plate 16A of the extra-length accommodating tray 16, a box-shaped optical connector accommodating portion 20 for arranging and arranging the optical connector 13 of each optical fiber cord 12 and the optical connector 14 of each tape fiber 3 is provided. The optical connector housing portion 20 extends in parallel to the arrangement direction of the optical fiber insertion grooves 19. And although the upper surface of the surplus length accommodation tray 16 is open | released, a lid | cover may be sufficient.
[0019]
On the bottom plate 16 </ b> A of the surplus length accommodation tray 16, the first surplus length path P extends from the cord inlet 22 located at one end side in the alignment direction of the optical fiber insertion groove 19 to the rear side of the optical connector accommodation portion 20. And extends to the cord outlet 23 located on the other end side in the alignment direction of the optical fiber insertion groove 19. The cord discharge port 23 faces the cord housing space A formed in front of the optical connector housing portion 20. In this case, the surplus length path P includes an outer partition piece 24 extending along the contour of the bottom plate 16A of the surplus length storage tray 16, and an inner partition extending at a predetermined interval from the outer partition piece 24. It is formed between the piece 25 and has a substantially U shape on the bottom plate 16 </ b> A from the cord introduction port 22 to the cord discharge port 23. On the bottom plate 16 </ b> A of the extra-length accommodating tray 16, the cord discharge port 23 is provided with an R-shaped guide portion 26 positioned on one end side of the optical connector accommodating portion 20. By setting the radius of the guide portion 26 to 30 mm or more, the minimum bending radius of the optical fiber cord 12 is ensured.
[0020]
When such a configuration is adopted, the optical fiber cord 12A inserted into the optical fiber insertion groove 19 farthest from the cord introduction port 22 is a partition extending in parallel to the arrangement direction behind the optical fiber insertion groove 19. It is led along the piece 27 to the cord introduction port 22. The optical fiber cord 12A is routed along the first extra length path P to the cord outlet 23, and then along the guide portion 26 so as to be close to the cord outlet 23. 20 ends. Then, the optical connector 13A of the optical fiber cord 12A is mounted on the end of the optical connector housing portion 20 on the cord discharge port 23 side.
[0021]
In contrast, the optical fiber cord 12B inserted into the optical fiber insertion groove 19 closest to the cord introduction port 22 is guided to the cord introduction port 22 in the shortest time. The optical fiber cord 12B is routed along the first extra length path P to the cord outlet 23, and then along the guide portion 26 so that the optical connector housing portion farthest from the cord outlet 23 is provided. 20 ends. The optical connector 13B of the optical fiber cord 12B is mounted on the end of the optical connector housing portion 20 on the cord introduction port 22 side.
[0022]
That is, when the lengths of the optical fiber cords 12 led out from the respective optical branching modules 8 are aligned, the optical connectors 13 of the respective optical fiber cords 12 inserted into the optical fiber insertion grooves 19 are arranged in the order of distance from the cord introduction port 22. They are sequentially arranged from the end of the optical connector housing part 20 on the cord outlet 23 side. Therefore, each optical fiber cord 12 having a uniform length can be accommodated in the extra-length accommodating tray 16 without difficulty. As a result of aligning the lengths of the optical fiber cords 12 led out from the optical branching module 8, all of the many optical branching modules 8 employed in the optical termination 1 can be made uniform. The work efficiency when assembling the optical branching module 8 to the end rack 1 is improved.
[0023]
The second extra length path Q for securing the extra length of the tape fiber 3 includes a tape introduction port 28 provided opposite to the cord introduction port 22 on one end side in the alignment direction of the optical fiber insertion groove 19. Opposite to the cord outlet 23, it extends in a substantially L shape between the tape outlet (multi-fiber optical fiber outlet) 29 located on the other end side in the alignment direction of the optical fiber insertion groove 19. To do. The tape discharge port 29 faces a tape storage space B formed behind the optical connector housing portion 20, and the tape discharge port 29 of the second extra length path Q is on the other end side of the optical connector housing portion 20. An R-shaped guide portion 30 is provided.
[0024]
By setting the radius of the guide part 30 to 30 mm or more, the minimum bending radius of the tape fiber 3 is ensured. The extra length path Q is created by the partition piece 27 described above and the partition piece 31 that is bent in an L shape while extending in parallel with the partition piece 27. And when the optical connector 14 provided in each tape fiber 3 is accommodated in the optical connector accommodating part 20, each tape fiber 3 is routed in the 2nd extra length path | route Q, and is discharged | emitted outside. Is done.
[0025]
Here, as shown in FIGS. 5 and 6, between the surplus length accommodation tray 16 and the frame body 6, there is provided a drawer means 33 for improving the efficiency of the switching operation of the optical connectors 13 and 14. It has been. The drawer means 33 is a pair of left and right sliders 34 projecting from both side surfaces 16a of the extra-length storage tray 16 and extending in the horizontal direction, and projecting from the frame 6 so as to sandwich the slider 34 from above and below. It consists of a pair of left and right guide rails 35 that extend. Accordingly, the surplus length accommodation tray 16 is pulled out in the horizontal direction by the cooperation of the slider 34 and the guide rail 35. In this way, as a result of the extra length accommodation tray 16 being pulled out to the operator side, access to the optical connectors 13 and 14 from the open end side of the extra length accommodation tray 16 is facilitated.
[0026]
Further, as shown in FIG. 7, the other drawer means 37 has a configuration in which the front end of the extra length accommodation tray 16 is rotated downward while the extra length accommodation tray 16 is pulled out. enable. Specifically, as shown in FIGS. 8 and 9, the pulling means 37 includes a pair of left and right rollers 38 provided on both side surfaces 16 a of the extra length accommodation tray 16 and a horizontal direction so as to sandwich the rollers 38 from above and below. And a pair of left and right guide rails 39 fixed to the frame body 6. Further, the roller 38 includes a front roller 38a, an intermediate roller 38b, and a rear roller 38c. The rollers 38a, 38b, and 38c are horizontally arranged along the guide rail 39, and the guide rail 39 is arranged on the upper side. The roller 38 moves between the upper and lower guide rails 39a and 39b. The roller 38 is composed of a guide rail 39a and a lower guide rail 39b.
[0027]
In the lower guide rail 39b, a drop hole 40 that allows the intermediate roller 38b to drop is provided at the front end thereof, and a rear roller 38c is received behind the drop hole 40 to receive the rear roller 38c. A bearing portion 41 for supporting the rotation of is provided. The bearing portion 41 has a semi-cylindrical shape and functions as a tray for the rear roller 38c. Further, stopper pieces 42a and 42b projecting inward are provided at the tips of the upper and lower guide rails 39a and 39b, respectively, and a front roller 38a is provided between the stopper piece 42a and the stopper piece 42b. The roller entrance / exit 43 is provided to allow the passage of. Therefore, the front end stopper 42 made up of the stopper pieces 42a and 42b makes it difficult for the front roller 38a to jump out of the guide rail 39 and contributes to preventing the excess length accommodation tray 16 from falling off. Reference numeral 50 denotes a rear end stopper.
[0028]
Therefore, as shown in FIGS. 10 and 11, when the extra-length accommodating tray 16 is pulled out toward the front, each roller 38 moves along the guide rail 39 and the front roller 38 a jumps out from the roller entrance 43. Subsequently, the intermediate roller 38 b falls from the drop hole 40, and at the same time, the rear roller 38 c falls into the bearing portion 41. As a result, the surplus length accommodation tray 16 rotates around the rear roller 38c as a rotation shaft, and as shown in FIG. 7, a leaning arrangement is achieved such that the open upper surface of the surplus length accommodation tray 16 faces the operator side.
[0029]
The optical termination according to the present invention is not limited to the above-described embodiment, and the extra length accommodation tray 16 may be disposed below the optical branching module group 10. In this case, the extra length accommodation tray 16 is arranged. As a result, the extra length accommodation tray 16 can be disposed close to the optical branching module group 10.
[0030]
【The invention's effect】
Since the optical termination according to the present invention is configured as described above, the following effects are obtained. That is, in order to branch-connect a multi-core optical fiber extending from the first side optical cable to a single-core optical fiber extending from the second side optical cable by optical connector connection, the first side optical cable and the second side optical cable are connected. In the optical termination rack in which the optical branching module is arranged on the connection with the optical branching module, and the optical branching module is arranged side by side in the frame and configured as a group of optical branching modules.
An optical fiber cord led out from the optical branching module and a multi-core optical fiber extending from the first-side optical cable are connected via an optical connector to accommodate the optical connector and at the same time, an optical fiber cord extending from the optical connector and the multi-core An extra-length accommodating tray that also accommodates an extra length with the optical fiber is disposed above or below the optical branching module group in the frame, and the extra-length accommodating tray is attached in the frame via the drawing means ,
In the extra length accommodation tray, a first extra length path for an optical fiber cord formed by a partition piece and a second extra length path for a multi-core optical fiber are provided,
The surplus length accommodating tray has an optical connector accommodating portion for accommodating a plurality of optical connectors side by side, and is located at one end side of the optical connector accommodating portion at the cord discharge port of the first extra length path. Place the shape guide part,
An optical fiber insertion groove aligned in a line corresponding to the position of each optical branching module in the frame is formed in the front part of the extra length accommodation tray. The first extra length path extends around the rear side of the optical connector housing portion from the cord inlet located on one aligned end side of the optical fiber insertion groove. Since it extends toward the cord discharge port located on the other aligned end side of the optical fiber insertion groove, it is possible to easily take out the optical connector and to make the installation space of the extra length accommodation tray more efficient. enable.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of an optical termination according to the present invention.
2 is a schematic view showing a connection state in the optical termination shown in FIG. 1. FIG.
FIG. 3 is a perspective view showing a state in which three members, that is, a surplus length accommodation tray, an optical branching module group, and an optical switch, are vertically stacked in a frame as one unit.
FIG. 4 is a plan view showing a surplus length accommodation tray.
FIG. 5 is a side view showing a state in which the extra length accommodation tray is pulled out in the horizontal direction.
FIG. 6 is an enlarged view of a main part showing a first modification of the drawing means.
FIG. 7 is a side view showing a state in which the extra length accommodation tray is leaned diagonally.
FIG. 8 is a perspective view showing a second modification of the drawing means.
FIG. 9 is an enlarged side view of a main part of FIG.
10 is a perspective view showing a state in which the extra length accommodation tray shown in FIG. 8 is pulled out. FIG.
11 is an enlarged side view of an essential part showing a state where the extra length accommodation tray shown in FIG. 9 is tilted obliquely from the horizontal state.
[Explanation of symbols]
P ... 1st extra length path, Q ... 2nd extra length path, 1 ... Optical termination, 2 ... Optical cable of 1st side, 3 ... Tape fiber (multi-fiber optical fiber), 4 ... 2nd side Optical cable, 5 ... Single fiber, 6 ... Frame, 8 ... Optical branch module, 10 ... Optical branch module group, 12 ... Optical fiber cord, 13, 14 ... Optical connector, 16 ... Extra length accommodating tray, 19 ... Optical Fiber insertion groove, 20 ... optical connector housing portion, 22 ... cord introduction port, 23 ... cord discharge port, 24, 25, 27, 31 ... partition piece, 26, 30 ... guide portion, 29 ... tape discharge port (multi-fiber light) Fiber outlet), 33, 37.

Claims (3)

第１側の光ケーブルから延び出る多心光ファイバを光コネクタ接続により、第２側の光ケーブルから延び出る単心光ファイバへ分岐接続させるために、第１側の光ケーブルと第２側の光ケーブルとの結線上に光分岐モジュールを配置させ、前記光分岐モジュールを、枠体内で並設させて光分岐モジュール群として構成させた光成端架において、
前記光分岐モジュールから導出させた光ファイバコードと前記第１側の光ケーブルから延び出る前記多心光ファイバとを光コネクタを介して接続させ、前記光コネクタを収容すると同時に、前記光コネクタから延びる前記光ファイバコードと前記多心光ファイバとの余長をも収容する余長収容トレーを、前記枠体内で前記光分岐モジュール群の上方又は下方に配置し、前記余長収容トレーは、引出し手段を介して前記枠体内で取付けられ、
前記余長収容トレー内には、仕切片により形成した前記光ファイバコード用の第１の余長経路と前記多心光ファイバ用の第２の余長経路とが設けられ、
前記余長収容トレー内には、複数の前記光コネクタを並設させて収容する光コネクタ収容部を有し、前記第１の余長経路のコード排出口に、前記光コネクタ収容部の一端側に位置するＲ形状のガイド部を配置させ、
前記余長収容トレーの前部には、前記枠体内における前記各光分岐モジュールの位置に対応して一列に整列させた光ファイバ挿入溝が形成され、前記余長収容トレー内には、前記光コネクタ収容部が前記光ファイバ挿入溝の配列方向に対して平行に延在し、前記第１の余長経路は、前記光ファイバ挿入溝の一方の整列端側に位置するコード導入口から前記光コネクタ収容部の後方側を這い回されて、前記光ファイバ挿入溝の他方の整列端側に位置する前記コード排出口に向けて延在することを特徴とする光成端架。In order to branch-connect a multi-core optical fiber extending from the first-side optical cable to a single-core optical fiber extending from the second-side optical cable by optical connector connection, the first-side optical cable and the second-side optical cable are connected to each other. In the optical termination rack in which the optical branching module is arranged on the connection, and the optical branching module is arranged side by side in the frame and configured as the optical branching module group
The optical fiber cord led out from the optical branching module and the multi-fiber optical fiber extending from the first-side optical cable are connected via an optical connector, and the optical connector is accommodated, and at the same time, the optical connector extends from the optical connector. An extra-length accommodating tray that accommodates an extra length of the optical fiber cord and the multi-core optical fiber is disposed above or below the optical branching module group in the frame, and the extra-length accommodating tray has a drawing means. Attached within the frame via ,
In the extra length accommodation tray, a first extra length path for the optical fiber cord formed by a partition piece and a second extra length path for the multi-fiber optical fiber are provided,
The surplus length accommodating tray has an optical connector accommodating portion for accommodating a plurality of the optical connectors arranged side by side, and one end side of the optical connector accommodating portion at the cord outlet of the first extra length path R-shaped guide part located at
An optical fiber insertion groove aligned in a line corresponding to the position of each optical branching module in the frame is formed in the front portion of the extra length accommodation tray. The connector housing portion extends in parallel with the arrangement direction of the optical fiber insertion grooves, and the first extra length path extends from the cord introduction port located on one aligned end side of the optical fiber insertion grooves. An optical termination frame which is wound around the rear side of the connector housing portion and extends toward the cord discharge port located on the other aligned end side of the optical fiber insertion groove . 前記第２の余長経路の多心光ファイバ排出口に、前記光コネクタ収容部の他端側に位置するＲ形状のガイド部を配置させたことを特徴とする請求項１記載の光成端架。The multi-fiber optical fiber outlet of the second extra length path, the end Mitsunari according to claim 1, characterized in that is disposed a guide portion of the R-shape which is located at the other end of the optical connector housing section Rack. 前記引出し手段は、引き出された前記余長収容トレーの前端が下方に向けて回転するように、前記余長収容トレーと前記枠体との間に設けられていることを特徴とする請求項１又は２記載の光成端架。It said drawer means, claim front end of the extra length accommodating tray drawn is to rotate downward, characterized in that provided between the frame member and the excess length accommodating tray 1 Or the optical termination according to 2 .
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