JP2004056862A

JP2004056862A - Fixing member and communication cable fixing method using the same

Info

Publication number: JP2004056862A
Application number: JP2002207833A
Authority: JP
Inventors: Fumiaki Tsuchiya; 土屋　文明; Isaburo Yagi; 八木　伊三郎; Masaru Yamakawa; 山河　勝
Original assignee: Sanki Engineering Co Ltd; Ashimori Industry Co Ltd; Ashimori Engineering Co Ltd
Current assignee: Sanki Engineering Co Ltd; Ashimori Industry Co Ltd; Ashimori Engineering Co Ltd
Priority date: 2002-07-17
Filing date: 2002-07-17
Publication date: 2004-02-19
Anticipated expiration: 2022-07-17
Also published as: JP4184726B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for fixing a communication cable or a sheath pipe in which the communication cable is inserted, with a tension applied, in the box of a branching pipe positioned at the end of the branching pipe of a buried pipe line. <P>SOLUTION: A fixing member 50 holds and fixes a communication cable 18 or a sheath pipe 16 in which the communication cable is inserted by applying a tension, inside branching-pipe boxes 8 and 9 at the end of branching pipe of a buried pipe line where branching pipes 4 and 5 are branched from a main pipe. A fixing member 11 comprises such outside surface as equal to the inside surface of the branching-pipe boxes 8 and 9 or so deformable as to be equal to them, and at least one disruption part 11A in the circumferential direction. A wedge piece 12 engages with the disruption part 11A of the fixing member body 11. A fastener 13 fixes the communication cable 18 or the sheath pipe 16 in which the communication cable 18 is inserted that is formed on the inside surface of the wedge piece 12 or the fixing member body 11. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、地中埋設管路である本管及び分岐管に通信ケーブルを敷設した際に、分岐管端部に位置する分岐管桝内で通信ケーブルを固定するための固定部材及びそれを用いた通信ケーブル固定方法に関する。
【０００２】
【従来の技術】
現在、高速・超高速通信のネットワークの構築が進められている中で、その媒体である通信ケーブルの敷設方法には、架空方式と地中埋設方式とがある。地中埋設方式での通信ケーブルの敷設は、架空方式での敷設と比べ、空間環境（地上風景の美観等）を守り、地震や台風などの災害に強いといった特性を有している。特に地中管路のうち下水道管は、本管に接続している分岐管（取付管）が既に各家庭へと導かれており、且つ管内上部は空きスペースとなっており、各家庭へ通信ケーブルを引込むＦＴＴＨ（Ｆｉｂｅｒ　Ｔｏ　Ｔｈｅ　Ｈｏｍｅ）計画の重要なインフラとして注目を浴びている。
【０００３】
下水道管を使用して各家に通信ケーブルを敷設する場合には、通信ケーブルは下水道本管から分岐管を通り、分岐管終端の分岐管桝（汚水桝を指し、宅地内又は道路上にある）からは地中を掘るなどして各家へと導かれる。
【０００４】
通信基地から地中管路本管内に２４から２００心程度の枝線ケーブル（通信ケーブル）を敷設し、地中管路本管同士を接続しているマンホール等において、接続分岐ボックスにより各家まで敷設するための２から４心程度（集合住宅はそれ以上）の引き込みケーブル（通信ケーブル）を分岐する。そして、マンホール等から引き込みケーブルを本管から分岐管を介して各家にまで敷設する方法が考えられ、全ての家に通信ケーブルを敷設する計画であるが、現実には空き家であったり、当面は敷設を望まない家も生じたりする。
【０００５】
従って、各家によって通信ケーブル敷設の時期がずれるため、従来では、各家に設けられる成端箱までの通信ケーブルの余長を図１０に示す分岐管１０Ｂと排水管１０Ｃが接続されている分岐管桝１０Ａの内面に通信ケーブル１０Ｅ及び通信ケーブル１０Ｅが挿通された鞘管１０Ｄを周回させてサドルなどの留め具１０Ｆで固定していた。また、通信ケーブル１０Ｅを敷設する場合には、新たに分岐管桝１０Ａに接続した通信管１０Ｇの内部に通信ケーブル１０Ｅを挿通させて各家の外壁付近まで通信管１０Ｇで保護した状態で通信ケーブル１０Ｅを導き、各家に設けられる成端箱に通信ケーブル１０Ｅを配線していた。
【０００６】
【発明が解決しようとする課題】
しかしながら、分岐管桝の直径がφ１５０ｍｍ以下などの小さなものの場合では、手を分岐管桝内に入れて通信ケーブル及び通信ケーブルが挿通された鞘管を固定する作業が困難であり、また、サドルなどの留め具を分岐管桝内の壁面へ取り付ける作業に時間を要していた。また、分岐管桝からネズミが這い上がらないように、分岐管桝に深さが７０ｃｍ以上のものが多く使用されていることも作業を困難としていた。
【０００７】
また、テンションガイド工法（登録商標）のように通信ケーブルを屈曲可能な鞘管（ガイド管）内に挿通して、鞘管を地中管路の本管内および分岐管内の上部側に固定する場合には、分岐管端部に位置する分岐管桝内で鞘管に張力を加えて鞘管を地中管路の本管内や分岐管内で弛まないように固定する必要があった。また、従来の通信ケーブル及び通信ケーブルが挿通された鞘管をサドルで固定する方法では、鞘管に十分な張力を加えることが困難であり、鞘管を弛ませないように本管内や分岐管内の上部側に固定することに問題があった。
【０００８】
本発明では、前述の問題点を考慮し、本管に分岐管が分岐している地中管路の分岐管端部に位置する分岐管桝内において、通信ケーブル及び通信ケーブルが挿通された鞘管に張力を加えた状態で固定することができ、また、分岐管桝が小さくて通信ケーブル及び通信ケーブルが挿通された鞘管の固定作業が行いにくい状況であっても、容易に通信ケーブル及び通信ケーブルが挿通された鞘管を固定することが可能な固定部材及びそれを用いた通信ケーブル固定方法を提供することを目的とする。
【０００９】
【課題を解決するための手段】
前記課題を解決するための請求項１に記載の固定部材は、本管に分岐管が分岐している地中管路の分岐管端部に位置する分岐管桝の内側で通信ケーブル又は通信ケーブルが挿通された鞘管に張力を加えた状態で保持して固定することができる固定部材であって、前記分岐管桝の内面に等しいか、又は前記分岐管桝の内面に等しいように変形可能な外面を有し、且つ周方向に少なくとも１箇所以上の分断部を有する固定部材本体と、前記固定部材本体の前記分断部に嵌合する楔片と、前記固定部材本体又は前記楔片の内面に形成している通信ケーブル又は通信ケーブルが挿通された鞘管を固定する留め具とで構成されているものである。
このような構成により、固定部材本体又は楔片の内面に形成している留め具で通信ケーブル又は通信ケーブルが挿通された鞘管を固定することにより、分岐管桝に対して直接留め具を取り付ける作業を必要とせず、分岐管桝が作業を行いにくい小さなものであっても、容易に通信ケーブル又は通信ケーブルが挿通された鞘管を固定することができる。
【００１０】
請求項２に記載の固定部材は、本管に分岐管が分岐している地中管路の分岐管端部に位置する分岐管桝の内側で通信ケーブルが挿通された鞘管に張力を加えた状態で保持して固定することができる固定部材であって、前記分岐管桝の内面に等しいか、又は前記分岐管桝の内面に等しいように変形可能な外面を有し、且つ周方向に少なくとも１箇所以上の分断部を有する固定部材本体と、前記固定部材本体の前記分断部に嵌合する楔片と、前記固定部材本体又は前記楔片の内面に形成している通信ケーブルが挿通された鞘管を遊嵌する留め具及び付勢手段と、前記通信ケーブルが挿通された鞘管を付勢状態で保持する緊締材とで構成されているものである。
このような構成により、固定部材本体又は楔片の内面に形成している留め具で通信ケーブル用鞘管を遊嵌し、鞘管を緊締材によって付勢部材を留め具との間で圧縮しながら保持することにより、鞘管に張力が加えられ、本管内及び分岐管内の上部側で通信ケーブルが挿通された鞘管を設置することが可能となり、本管内及び分岐管内の汚水等の流れを阻害しない。
【００１１】
請求項３に記載の固定部材は、請求項１又は２において、前記固定部材本体の前記分断部は、その軸方向に対して傾斜したテーパ面が形成され、且つ前記楔片は前記テーパ面に適合するテーパ縁が形成されていることを特徴とするものである。
このような構成により、テーパ面が分岐管桝下側に向かって先太りの場合は、固定部材本体に留め具を形成することで、固定部材本体に分岐管桝下側へ移動しようとする力が通信ケーブル又は通信ケーブルが挿通された鞘管より働いて、テーパ面が楔片のテーパ縁に食い込む状態となり、楔片との嵌合状態がより高まる。また、テーパ面が分岐管桝下側に向かって先細りの場合は、楔片に留め具を形成することで、楔片に分岐管桝下側へ移動しようとする力が通信ケーブル又は通信ケーブルが挿通された鞘管より働いて、テーパ縁が固定部材本体のテーパ面に食い込む状態となり、固定部材本体との嵌合状態がより高められる。
【００１２】
請求項４に記載の固定部材は、請求項３において、前記楔片に留め具が形成していることを特徴とするものである。
このような構成により、テーパ面が分岐管桝下側に向かって先細りの場合は、楔片に留め具を形成することで、楔片に分岐管桝下側へ移動しようとする力が通信ケーブル又は通信ケーブルが挿通された鞘管より働いて、テーパ縁が固定部材本体のテーパ面に食い込む状態となり、固定部材本体との嵌合状態がより高められる。
【００１３】
請求項５に記載の固定部材は、請求項３又は４において、前記固定部材本体の前記テーパ面は、前記固定部材本体の外面から内面に向かって先細りの傾斜面が形成され、且つ前記楔片のテーパ縁は前記傾斜面に適合する傾斜縁が形成されていることを特徴とするものである。
このような構成により、分岐管桝内の固定部材及び楔片に地震や車両等による振動が伝わっても、楔片が分岐管桝の内側へ脱落して外れることがなくなる。
【００１４】
請求項６に記載の通信ケーブル固定方法は、本管に分岐管が分岐している地中管路の分岐管端部に位置する分岐管桝の内側で通信ケーブル又は通信ケーブルが挿通された鞘管に張力を加えた状態で保持して固定することができる固定部材を用いた通信ケーブル固定方法であって、前記分岐管桝の内面に等しいか、又は前記分岐管桝の内面に等しいように変形可能な外面を有し、且つ周方向に少なくとも１箇所以上の分断部を有する固定部材本体の前記分断部に楔片を嵌合して取り付けると共に、前記固定部材本体又は前記楔片の内面に形成している留め具によって、前記通信ケーブル又は前記通信ケーブルが挿通された鞘管を固定することを特徴とするものである。
このような方法によると、固定部材本体又は楔片の内面に形成している留め具で通信ケーブル又は通信ケーブルが挿通された鞘管を固定することより、分岐管桝に対して直接留め具を取り付ける作業を必要とせず、分岐管桝が作業を行いにくい小さなものであっても、容易に通信ケーブル又は通信ケーブルが挿通された鞘管を固定することができる。
【００１５】
請求項７に記載の通信ケーブル固定方法は、本管に分岐管が分岐している地中管路の分岐管端部に位置する分岐管桝の内側で通信ケーブルが挿通された鞘管に張力を加えた状態で保持して固定することができる固定部材を用いた通信ケーブル固定方法であって、前記分岐管桝の内面に等しいか、又は前記分岐管桝の内面に等しいように変形可能な外面を有し、且つ周方向に少なくとも１箇所以上の分断部を有する固定部材本体の前記分断部に楔片を嵌合して取り付けると共に、前記固定部材本体又は前記楔片の内面に形成している留め具及び前記留め具の上部に位置する付勢手段に、前記通信ケーブルが挿通された鞘管を遊嵌し、前記通信ケーブルが挿通された鞘管に取り付けた緊締材によって前記付勢手段を前記留め具との間で圧縮して前記通信ケーブルが挿通された鞘管に張力を作用させて、前記通信ケーブルが挿通された鞘管を分岐管内の上部に保持することを特徴とするものである。
このような方法によると、固定部材本体又は楔片の内面に形成している留め具で通信ケーブルが挿通された鞘管を遊嵌し、鞘管を緊締材によって付勢部材を留め具との間で圧縮しながら保持することにより、鞘管に張力が加えられ、本管内及び分岐管内の上部側で通信ケーブルが挿通された鞘管を設置することが可能となり、本管内及び分岐管内の汚水等の流れが阻害されないようにすることができる。
【００１６】
請求項８に記載の通信ケーブル固定方法は、請求項６又は７において、前記固定部材本体の前記分断部には、分岐管桝下側に向かって先太りのテーパ面が形成され、且つ前記楔片には前記テーパ面に適合するテーパ縁が形成されて前記固定部材本体に嵌合すると共に、前記固定部材本体に前記留め具が形成されていることを特徴とするものである。
このような方法によると、固定部材本体に分岐管桝下側へ移動しようとする力が通信ケーブル又は通信ケーブルが挿通された鞘管より働いて、テーパ面が楔片のテーパ縁に食い込む状態となり、楔片との嵌合状態がより高められ、さらに固定部材本体のテーパ面が楔片のテーパ縁に食い込むことで、固定部材本体の外周が広がり、固定部材本体及び楔片の外面と分岐管桝の内面との摩擦力が大きくなり、固定部材本体及び楔片の固定保持力がより大きくなる。
【００１７】
請求項９に記載の通信ケーブル固定方法は、請求項６又は７において、前記固定部材本体の前記分断部には、分岐管桝下側に向かって先細りのテーパ面が形成され、且つ前記楔片には前記テーパ面に適合するテーパ縁が形成されて前記固定部材本体に嵌合すると共に、前記楔片に留め具が形成されていることを特徴とするものである。
このような方法によると、楔片に分岐管桝下側へ移動しようとする力が通信ケーブル又は通信ケーブルが挿通された鞘管より働いて、テーパ縁が固定部材本体のテーパ面に食い込む状態となり、固定部材本体との嵌合状態がより高められ、さらに固定部材本体のテーパ面に楔片のテーパ縁が食い込むことで、固定部材本体の外周が広がり、固定部材本体及び楔片の外面と分岐管桝の内面との摩擦力が大きくなり、固定部材本体及び楔片の固定保持力がより大きくなる。
【００１８】
請求項１０に記載の通信ケーブル固定方法は、請求項８又は９において、前記固定部材本体のテーパ面は、前記固定部材本体の外面から内面に向かって先細りの傾斜面が形成され、且つ前記楔片のテーパ縁は前記傾斜面に適合する傾斜縁が形成されてなり、前記楔片を前記固定部材本体に嵌合することを特徴とするものである。
このような方法により、分岐管桝内の固定部材及び楔片に地震や車両等による振動が伝わっても、楔片が分岐管桝の内側へ脱落して外れることがなくなる。
【００１９】
【発明の実施の形態】
以下、図面を参照しつつ、本発明の実施形態の一例を説明する。なお以下の説明において、地中管路は下水道管であるものとして説明するが、特に管路系や管種を限定するものではない。
【００２０】
図１は、地中管路の概略の一例を示した断面図である。図１において、１は下水道管の本管であり、マンホール２と他のマンホール３との間に配管されている。そしてその本管１の上部側から、分岐管口６、７において分岐管４、５が分岐し、当該分岐管４、５は各家庭毎の分岐管端部である分岐管桝８、９にまで接続されている。
【００２１】
一般に本管１は道路に沿って深さ数ｍの位置に敷設されており、図２に示すように当該本管１の斜め側上部に分岐管口６、７が形成され、分岐管４、５は分岐管口６、７から角度を変え分岐管桝８、９に接続されている。
【００２２】
また、下水道方式には、雨水を別配管にしている分流式と、雨水と汚水を共に流す合流式とがある。これらの下水道方式において、分流式の場合は、分岐管である下水道取付管に接続されている取付管桝と雨水管に接続している雨水桝が本実施形態例の分岐管桝８、９に該当し、合流式の場合は取付管桝が本実施形態例の分岐管桝８、９に該当する。また、電力ケーブルを地中配管によって各家庭へ供給している場合は、電力管に接続している電力用桝なども本実施形態例の分岐管桝８、９に該当し、利用可能である。
【００２３】
図３に下水道の一例として各桝の状況を示す。家２０の浴室、便所、台所等の排水管３０と接続している集水桝３５や集水桝３５からの排水管３１を合流する合接桝３４、排水管３２と分岐管桝８、９からの排水管１０を接続する接続桝３３などが宅地内に点検用汚水桝として設置されていることが多い。これらの点検用汚水桝内にも通信ケーブル１８又は通信ケーブル１８が挿通された鞘管１６を後述する固定部材を用いて固定する場合にも適用することが可能である。特に通信利用者としては、なるべく宅地の外壁に近い位置まで地中を利用して通信ケーブル１８を配線する方が、断線の恐れが少なく、美観上の価値が高いという理由などで宅地内の桝等を利用して通信ケーブル１８を敷設する場合が多い。
【００２４】
先ず、本管１内に通信ケーブル等を敷設する際には、本管１内をＴＶカメラ等を使用して、マンホール２、３間の距離、マンホール２から本管１内の各分岐管４、５の分岐口６、７までの距離、分岐管４、５から分岐管桝８、９までの距離、分岐管桝８、９の深さ等を正確に測定する（図１参照）。
【００２５】
次いで、通信ケーブル１８の敷設を希望する各家の成端箱までの通信ケーブル１８及び通信ケーブル１８が挿通された鞘管１６を分岐管桝８、９まで敷設する。なお、後述する本実施形態例では、通信ケーブル１８が予め鞘管内に挿通された鞘管１６を用いる場合について説明するが、通信ケーブル１８そのものだけでも同様に適用することができる。
【００２６】
また、通信ケーブル１８及び通信ケーブル１８が挿通された鞘管１６を分岐管８、９まで敷設する方法としては、公知の方法を用いることができる。例えば、通信基地から地中管路内の本管内に２４から２００心程度の通信ケーブルを敷設し、地中管路本管同士を接続しているマンホール等において、接続分岐ボックスにより各家の成端箱まで敷設するための２から４心程度（集合住宅はそれ以上）の通信ケーブルを分岐し、通信ケーブルの防護用として鞘管（ガイド管）などに通信ケーブルを挿通して本管から分岐管を介して分岐管桝まで敷設する。
【００２７】
また、図１を参考にして分岐管桝までの通信ケーブル及び通信ケーブルが挿通された鞘管の敷設方法の一例を説明すると、マンホール２、３間の本管１内の上部に、鞘管（ガイド管）を所定間隔で配置された固定部材で設置したり、鞘管内にテンション用ワイヤロープを挿通させておき、ワイヤロープの両端を鞘管の両端部に位置するマンホール２、３内で固定し、テンション用ワイヤロープに張力を与えて鞘管を本管１内の上部に設置することができる。本管１内の上部に設置された鞘管内に通信ケーブルを挿通させ、マンホール２、３間に位置する分岐管４、５に、分岐管口６、７に近い位置で鞘管に穴を設け、その穴から取り出した通信ケーブルを分岐管端部に位置する分岐管桝８、９まで敷設する。なお、分岐管桝までの通信ケーブル及び通信ケーブルが挿通された鞘管の敷設は、特に限定されるものでない。
【００２８】
このようにして分岐管桝８、９まで敷設された通信ケーブル及び通信ケーブルが挿通された鞘管は、後述する固定部材で分岐管桝８、９内に固定され、通信ケーブル１８の敷設を希望する各家の成端箱まで通信ケーブルを導くことができる。
【００２９】
通信ケーブル１８は、内部にテンション材としてステンレス管を有しており、そのステンレス管の中に４心の光ファイバーが通されており、外面がポリエチレン樹脂で被覆された太さが５ｍｍ前後のケーブルが本実施形態例において、好適に使用できる。なお、通信ケーブル１８には、４心型のもの以外に、２心型やその他の形式のものも使用可能である。
【００３０】
また、通信ケーブル１８が挿通された鞘管１６は、ステンレス製のスパイラル形状を有するものが本実施形態例で好適に使用されるが、特に限定するものでなく、その他の素材でなる管やスパイラル形状でないものでも地中管路の種別によっては選定可能である。
【００３１】
以上のようにして各分岐管桝８、９に敷設された通信ケーブル１８及び通信ケーブル１８が挿通された鞘管１６は、図４に示す固定部材５０によって固定される。
【００３２】
図４は固定部材の構成を示した基本構成図である。図４において、固定部材本体１１は、分岐管桝８、９の内面に等しいか、又は分岐管桝８、９の内面に等しいように変形可能な外面を有しており、周方向に少なくとも１箇所以上の分断部１１Ａを有している。固定部材本体１１は、１箇所の分断部１１Ａを有する一例を本実施形態例で示しているが、２箇所以上の分断部を有していても、分断部の数に対応する楔片によって、固定部材の形成が可能であれば分断部の数は限定されない。
【００３３】
また、楔片１２は、固定部材本体１１の分断部１１Ａに嵌合できるものであり、固定部材本体１１の分断部１１Ａの数と同じ数の楔片１２が必要である。また、分断部１１Ａを２箇所以上設けることによって、分岐管桝８、９の形状が四角状の場合などに適用できる。
【００３４】
前述の固定部材本体１１及び楔片１２の素材としては、ステンレス等の金属、ＰＥ、ＰＰ、ＰＶＣ等の硬質プラスチック、エンジニアリングプラスチック、ＦＲＰ等で形成される成形品も使用可能であるが、好ましくは、加工性が良く、軽量で安価なＰＥ、ＰＰ、ＰＶＣ等の硬質プラスチックで形成される成形品が特に好適である。
【００３５】
前述の固定部材本体１１の分断部１１Ａには、その軸方向に対して傾斜したテ−パ面２４Ａを形成し、楔片１２には前記テーパ面２４Ａに適合するテーパ縁２４Ｂが形成している。図４においては、前記テーパ面２４Ａが下方（分岐管桝下側に相当）に向かって先細りとなっている状態を例示している。
【００３６】
また、図４に示す留め具１３は、サドル状のものでワッシャ１３Ａを介してビス１３Ｂで楔片１２に固定し、通信ケーブル１８が挿通された鞘管１６が遊嵌可能に形成されている。なお、留め具１３は、固定部材本体１１の内面にワッシャ１３Ａを介してビス１３Ｂで固定し、通信ケーブル１８が挿通された鞘管１６が遊嵌可能な留め具１３であっても良い。
【００３７】
また、留め具１３は、固定部材本体１１又は楔片１２の内面に形成していれば良く、通信ケーブル１８又は通信ケーブル１８が挿通された鞘管１６そのものを固定することができるものも使用可能であり、特に限定されるものではない。
【００３８】
このように固定部材本体１１又は楔片１２に留め具を形成し、通信ケーブル１８が挿通された鞘管１６を固定することにより、直接留め具１３を分岐管桝８、９内に取り付ける作業を必要とせず、分岐管桝８、９が作業を行いにくい小さなものであっても容易に通信ケーブル１８及び通信ケーブル１８が挿通された鞘管１６を固定することができる。
【００３９】
また、図４に示す緊締材１５は中空管でなり、通信ケーブル１８が挿通された鞘管１６を中空管内に挿通し、緊締材１５に形成されたネジ部１５Ｂでビス１５Ａにより通信ケーブル１８が挿通された鞘管１６を固定することができるものである。
【００４０】
また、通信ケーブル１８が挿通された鞘管１６を緊締材１５で固定する際において、通信ケーブル１８が挿通された鞘管１６を固定部材本体１１又は楔片１２に形成された遊嵌可能な留め具１３に挿通し、ワッシャ１９Ａと付勢手段１４（スプリング等）とワッシャ１９Ｂを介して、緊締材１５に挿通して緊締材１５に形成されたネジ部１５Ｂでビス１５Ａにより通信ケーブル１８が挿通された鞘管１６を固定することもできる。
【００４１】
また、図５に示す固定部材本体１１のテーパ面２４Ａには外面から内面に向かって先細りの傾斜面２５Ａを形成し、楔片１２のテーパ縁２４Ｂに前記傾斜面２５Ａに適合する傾斜縁２５Ｂを形成することで、楔片１２が分岐管桝８、９の内側へ脱落する恐れがなくなる。この他に、図６で示すような支持片２１Ａを固定部材本体２１の分断部２１Ｂに形成することで、同様な効果を得ることが可能となる。
【００４２】
また、前述の先細りの傾斜面２５Ａは、切欠き側の外面が内面より長い切欠きによって形成されるものである。この傾斜面２５Ａが、固定部材本体１１の分断部１１Ａに、その軸方向に対して傾斜したテーパ面２４Ａの外面から内面に向かって先細りの傾斜面２５Ａに該当し、固定部材本体１１の分断部１１Ａのテーパ面２４Ａに適合した楔片１２のテーパ縁２４Ｂに前記傾斜面２５Ａに適合する傾斜を有するものを傾斜縁２５Ｂとする。
【００４３】
図７は、通信ケーブルが挿通された鞘管の先端部処理構造の一例を示しており、通信ケーブル１８が挿通された鞘管１６の先端には、通信ケーブル１８が貫通可能な端末具２０を通信ケーブル１８が挿通された鞘管１６端部に取り付ける。この端末具２０は中空管でなり、内面には、通信ケーブル１８が挿通された鞘管１６端部と通信ケーブル１８との段差に適合するような段２０Ｄが設けられている。端末具２０を通信ケーブル１８が挿通された鞘管１６端部に取り付ける際に、通信ケーブル１８と端末具２０との隙間を粘土状の気密剤２０Ｂ、例えばエポキシモルタル等でシールしておき、通信ケーブル１８が挿通された鞘管１６内に水や虫などが入り込まないようにしておく。
【００４４】
また、通信ケーブル１８が挿通された鞘管１６と端末具２０との隙間にも粘土状の気密剤などでシールすることで、より通信ケーブル１８が挿通された鞘管１６内に水や虫などが入り込まないようにすることができる。なお、通信ケーブル１８が挿通された鞘管１６が図７のようなスパイラル状の場合には、端末具２０の内部にスパイラル溝に嵌合するネジ山２０Ｃが形成しているものを使用し、ビス２０Ａと併用して固定することが好ましい。
【００４５】
以上のように構成される固定部材５０で通信ケーブル１８が挿通された鞘管１６を分岐管桝内８、９内で固定することができる。
【００４６】
図８は、分岐管桝内での通信ケーブル固定構造の基本構造図を示しており、図８において、分岐管４、５と排水管１０と地上までの立上り管１７が接続された分岐管桝８、９の立上り管１７内に位置する固定部材５０で、分岐管４、５内に敷設された通信ケーブル１８が挿通された鞘管１６に、張力を加えた状態で保持して固定することができる。
【００４７】
図８に示すように、通信ケーブル１８が挿通された鞘管１６を分岐管４、５内の上部に設置する場合には、固定部材本体１１の分断部１１Ａに嵌合する楔片１２の内面に通信ケーブル１８が挿通された鞘管１６を遊嵌可能な留め具１３を形成しておき、留め具１３上部には、スプリングなどの付勢手段１４を配置し、付勢手段１４を圧縮状態で保持する緊締材１５を通信ケーブル１８が挿通された鞘管１６に取り付けることで通信ケーブル１８が挿通された鞘管１６に張力を発生させ、通信ケーブル１８が挿通された鞘管１６を分岐管４、５上部に設置することが可能となる。
【００４８】
また、一実施形態例として、前述の固定部材本体１１の内面に通信ケーブル１８が挿通された鞘管１６を遊嵌可能な留め具１３を形成しておき、留め具１３上部には、スプリングなどの付勢手段１４を配置し、付勢手段１４を圧縮状態で保持する緊締材１５を通信ケーブル１８が挿通された鞘管１６に取り付けることで、同様に通信ケーブル１８が挿通された鞘管１６を分岐管４、５内の上部に設置することが可能である。
【００４９】
さらに、通信ケーブル１８が挿通された鞘管１６を固定する留め具１３を固定部材本体１１、又は楔片１２の内面に形成することで通信ケーブル１８が挿通された鞘管１６を固定することも可能である。なお、分岐管桝８、９の形状によっては、立上り管１７を必要としない場合もあるが、このような場合にも、分岐管桝８、９の内面形状に等しいか、又は分岐管桝８、９の内面形状に等しいように変化可能な外面を有し、周方向に少なくとも１箇所以上の分断部１１Ａを有する固定部材本体１１と固定部材本体１１の分断部１１Ａに嵌合する楔片１２を用いることにより適用可能である。
【００５０】
前述の通信ケーブル１８が挿通された鞘管１６に張力を発生させた状態で固定する場合には、固定部材本体１１の分断部１１Ａに、その軸方向に対して傾斜したテーパ面２４Ａを形成し、楔片１２にはテーパ面２４Ａに適合するテーパ縁２４Ｂを形成し、テーパ面２４Ａが分岐管桝８、９の下側に向かって先太りの場合においては、固定部材本体１１の内面に通信ケーブル１８が挿通された鞘管１６を遊嵌可能な留め具１３を形成しておき、留め具１３上部には、スプリングなどの付勢手段１４を配置することで、固定部材本体１１には付勢手段１４の圧縮によって分岐管桝８、９下側へ移動しようとする力が働き、楔片１２との嵌合力が増大し、固定状態がより高まるので好ましい。
【００５１】
そして、固定部材本体１１のテーパ面２４Ａが楔片１２のテーパ縁２４Ｂに食い込むことで、固定部材本体１１の外周が広がり、固定部材本体１１及び楔片１２の外面と分岐管桝８、９の内面、又は立上り管１７が分岐管桝８、９に形成されている場合は立上り管１７の内面との摩擦力が大きくなり、固定部材本体１１及び楔片１２の固定保持力がより大きくなる。
【００５２】
また、固定部材本体１１の内面に通信ケーブル１８が挿通された鞘管１６を固定する留め具１３を形成することで、通信ケーブル１８が挿通された鞘管１６により、固定部材本体１１が分岐管桝８、９下側へ移動しようとする力が働き、楔片１２との嵌合力が増大し、固定状態がより高まるので好ましい。
【００５３】
また、テーパ面２４Ａが分岐管桝８、９下側に向かって先細りの場合においては、楔片１２の内面に通信ケーブル１８が挿通された鞘管１６を遊嵌可能な留め具１３を形成しておき、留め具１３上部には、スプリングなどの付勢手段１４を配置することで、楔片１２には付勢手段１４の圧縮によって分岐管桝８、９下側へ移動しようとする力が働き、固定部材本体１１との嵌合力が増大し、固定状態がより高まるので好ましい。
【００５４】
そして、固定部材本体１１のテーパ面２４Ａに楔片１２のテーパ縁２４Ｂが食い込むことで、固定部材本体１１の外周が広がり、固定部材本体１１及び楔片１２の外面と分岐管桝８、９の内面、又は立上り管１７が分岐管桝８、９に形成されている場合は立上り管１７の内面との摩擦力が大きくなり、固定部材本体１１及び楔片１２の固定保持力がより大きくなる。
【００５５】
また、楔片１２の内面に通信ケーブル１８が挿通された鞘管１６を固定する留め具１３を形成することで、通信ケーブル１８が挿通された鞘管１６により、楔片１２が分岐管桝８、９下側へ移動しようとする力が働き、固定部材本体１１との嵌合力が増大し、固定状態がより高まるので好ましい。
【００５６】
また、図９は分岐管桝８、９で固定された通信ケーブル１８が各家へと導かれた一例を示したものであり、分岐管桝８、９には、排水経路とは異なる通信管２７が接続され、通信管２７は外壁近くに形成されている通信専用桝となる地中箱２８と接続している。通信管２７には、通常の管種が適用され、地中箱２８も小さめの通常の桝が使用される。地中箱２８の中を通信ケーブル１８が通り、外壁に設けられた成端箱２６で家庭内ＬＡＮケーブルと接続される。また、地中箱２８を形成せずにＬ字状の通信管のみで外壁近くまで通信ケーブル１８を導く場合や、このような通信管などを設置するための掘削工事が不能の場合には、分岐管桝８、９の近くにポールを建てて一旦地上に通信ケーブル１８を引き上げ、そこから成端箱２６に架空で導いたり、無線方式で家庭内受信機と接続するなど、種々の方法が挙げられる。なお、地中箱２８の素材や形状は、特に限定するものでない。
【００５７】
以上のような通信ケーブル１８又は通信ケーブル１８が挿通された鞘管１６の固定方法により、通信ケーブル１８の敷設を行う各家の分岐管桝８、９で通信ケーブル１８又は鞘管１６を容易に固定し、且つ張力を保持した状態で固定することができ、本管１内、分岐管４、５内の上部側に通信ケーブル１８又は鞘管１６を敷設することによって本管１内及び分岐管４、５内の汚水等の流れを阻害されないようにすることができる。
【００５８】
【発明の効果】
以上のように、本発明は、分岐管桝内において、通信ケーブル又は通信ケーブルが挿通された鞘管に張力を加えた状態で保持して固定することができる。また、分岐管桝内での作業が困難な小さなものであっても、通信ケーブル又は通信ケーブルが挿通された鞘管を容易に固定することができるという効果がある。
【図面の簡単な説明】
【図１】地中管路の概略の一例を示した断面図である。
【図２】分岐管の配置状態を示した断面図である。
【図３】下水道の一例として各桝の状況を示した図である。
【図４】本発明に係る固定部材の構成を示した一実施形態例の基本構成図である。
【図５】本発明に係る固定部材本体及び楔片の一実施形態例の上面図である。
【図６】本発明の他の実施形態例の固定部材を示した斜視図である。
【図７】本発明に係る通信ケーブルが挿通された鞘管の先端部処理構成を示した一実施形態例の基本構成図である。
【図８】本発明に係る分岐管桝内での通信ケーブルが挿通された鞘管の固定構造を示した一実施形態例の基本構造図である。
【図９】本発明に係る各家への通信ケーブル敷設状況の一例を示した模式図である。
【図１０】従来の通信ケーブル固定状況の一例を示した概略図である。
【符号の説明】
４，５　分岐管
８，９　分岐管桝
１０　排水管
１１　固定部材本体
１１Ａ　分断部
１２　楔片
１３　留め具
１４　付勢手段（スプリング）
１５　緊締材
１６　鞘管
１７　立上り管
１８　通信ケーブル
２４Ａ　テーパ面
２４Ｂ　傾斜面
２５Ａ　テーパ縁
２５Ｂ　傾斜縁
５０　固定部材[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention provides a fixing member for fixing a communication cable in a branch pipe basin located at an end of the branch pipe when the communication cable is laid on the main pipe and the branch pipe which are buried underground pipes, and uses the same. Communication cable fixing method.
[0002]
[Prior art]
At present, while the construction of a high-speed / ultra-high-speed communication network is being advanced, there are two methods of laying a communication cable, which is a medium, an overhead method and an underground method. The laying of the communication cable by the underground burying method has characteristics that, compared to the laying by the fictitious method, protects the spatial environment (the beauty of the ground scenery and the like) and is resistant to disasters such as earthquakes and typhoons. In particular, among the underground pipelines, the branch pipes (mounting pipes) connected to the main pipe of the sewer pipe have already been led to each home, and the upper part of the pipe is an empty space, and communication to each home is made. It is drawing attention as an important infrastructure of the FTTH (Fiber To The Home) project to pull in cables.
[0003]
When laying a communication cable in each house using a sewer pipe, the communication cable passes through the branch pipe from the sewer main pipe, and a branch pipe basin at the end of the branch pipe (refers to a sewage basin and is located on residential land or on a road) ) Leads to each house by digging underground.
[0004]
A branch cable (communication cable) of about 24 to 200 cores is laid from the communication base into the underground conduit main line, and at the manhole etc. connecting the underground conduit main lines to each house with a connection branch box. Branch cables (communication cables) of 2 to 4 cores (or more for multi-family houses) for laying are branched. A method of laying cables from manholes etc. to main houses through main pipes and branch pipes is conceivable, and it is planned to lay communication cables in all houses. Some houses do not want to be laid.
[0005]
Therefore, since the time of laying the communication cable is different depending on each house, conventionally, the extra length of the communication cable up to the termination box provided in each house is determined by the branch connecting the branch pipe 10B and the drain pipe 10C shown in FIG. The communication cable 10E and the sheath tube 10D into which the communication cable 10E is inserted are wound around the inner surface of the tube 10A, and are fixed with fasteners 10F such as saddles. When the communication cable 10E is laid, the communication cable 10E is inserted into the communication pipe 10G newly connected to the branch pipe box 10A, and the communication cable 10G is protected near the outer wall of each house by the communication pipe 10G. 10E was led, and the communication cable 10E was wired to the termination box provided in each house.
[0006]
[Problems to be solved by the invention]
However, when the diameter of the branch tube is small such as 150 mm or less, it is difficult to fix the communication cable and the sheath tube through which the communication cable is inserted by inserting a hand into the branch tube, and it is difficult to use a saddle or the like. It took time to attach these fasteners to the wall inside the branch pipe tub. In addition, it is difficult to work because a branch pipe having a depth of 70 cm or more is often used in order to prevent rats from climbing up from the branch pipe.
[0007]
When the communication cable is inserted into a bendable sheath pipe (guide pipe) as in the tension guide method (registered trademark), and the sheath pipe is fixed to the upper part of the main pipe and the branch pipe of the underground pipe. In this method, it was necessary to apply tension to the sheath pipe in the branch pipe basin located at the end of the branch pipe so that the sheath pipe was not loosened in the main pipe of the underground pipe or in the branch pipe. In addition, in the conventional method of fixing the communication cable and the sheath tube through which the communication cable is inserted with a saddle, it is difficult to apply sufficient tension to the sheath tube, so that the sheath tube is not loosened inside the main tube or the branch tube so as not to be loosened. There was a problem with fixing to the upper side of the.
[0008]
In the present invention, in consideration of the above-described problems, a communication cable and a sheath through which the communication cable is inserted are provided in a branch pipe basin located at an end of a branch pipe of an underground pipe in which a branch pipe branches from the main pipe. The pipe can be fixed with tension applied to it, and even in a situation where it is difficult to fix the communication cable and the sheath tube through which the communication cable is inserted due to the small size of the branch pipe, the communication cable and It is an object to provide a fixing member capable of fixing a sheath tube into which a communication cable has been inserted, and a communication cable fixing method using the same.
[0009]
[Means for Solving the Problems]
The fixing member according to claim 1 for solving the above-mentioned problem, comprises a communication cable or a communication cable inside a branch pipe tub located at an end of a branch pipe of an underground pipe where a branch pipe branches from the main pipe. Is a fixing member that can be held and fixed in a state where tension is applied to the inserted sheath tube, and can be deformed to be equal to the inner surface of the branch tube or to be equal to the inner surface of the branch tube. Fixing member main body having an external surface and having at least one or more dividing portions in the circumferential direction, a wedge piece fitted to the dividing portion of the fixing member main body, and an inner surface of the fixing member main body or the wedge piece. And a fastener for fixing the sheath tube through which the communication cable is inserted.
With such a configuration, by fixing the communication cable or the sheath tube through which the communication cable is inserted with the fastener formed on the inner surface of the fixing member main body or the wedge piece, the fastener is directly attached to the branch pipe container. Even if the branch pipe measure is small and it is difficult to perform the work without any work, the communication cable or the sheath tube through which the communication cable is inserted can be easily fixed.
[0010]
The fixing member according to claim 2 applies tension to the sheath pipe through which the communication cable is inserted inside the branch pipe box located at the end of the branch pipe in the underground pipe where the branch pipe branches from the main pipe. A fixing member that can be held and fixed in a state in which the outer surface is deformable so as to be equal to the inner surface of the branch tube or the inner surface of the branch tube, and in the circumferential direction. A fixing member main body having at least one or more dividing parts, a wedge piece fitted into the dividing part of the fixing member main body, and a communication cable formed on the inner surface of the fixing member main body or the wedge piece are inserted. And a biasing means for loosely fitting the sheath tube, and a tightening member for holding the sheath tube in which the communication cable is inserted in a biased state.
With such a configuration, the communication cable sheath tube is loosely fitted with the fastener formed on the inner surface of the fixing member main body or the wedge piece, and the urging member is compressed between the sheath tube and the fastener by the tightening material. By holding the tube while holding it, tension is applied to the sheath tube, and it becomes possible to install the sheath tube through which the communication cable is inserted in the upper part of the main tube and the branch tube. Does not inhibit.
[0011]
According to a third aspect of the present invention, in the fixing member according to the first or second aspect, the dividing portion of the fixing member main body has a tapered surface inclined with respect to an axial direction thereof, and the wedge piece is formed on the tapered surface. It is characterized in that a suitable tapered edge is formed.
With such a configuration, when the tapered surface is tapered toward the lower side of the branch tube, by forming a fastener on the fixing member main body, the force for moving the fixing member main body to the lower side of the branch tube is used. Works from the communication cable or the sheath tube through which the communication cable is inserted, so that the tapered surface bites into the tapered edge of the wedge piece, and the fitting state with the wedge piece is further enhanced. Further, when the tapered surface is tapered toward the lower side of the branch pipe, by forming a fastener on the wedge piece, the force for moving the wedge piece to the lower side of the branch pipe is a communication cable or a communication cable. Working from the inserted sheath tube, the tapered edge bites into the tapered surface of the fixing member main body, and the fitting state with the fixing member main body is further enhanced.
[0012]
A fixing member according to a fourth aspect is characterized in that, in the third aspect, a fastener is formed on the wedge piece.
With such a configuration, when the tapered surface is tapered toward the lower side of the branch pipe, by forming a fastener on the wedge piece, the force for moving the wedge piece to the lower side of the branch pipe can be increased by the communication cable. Alternatively, the tapered edge bites into the tapered surface of the fixing member main body by operating from the sheath tube through which the communication cable is inserted, and the fitting state with the fixing member main body is further enhanced.
[0013]
The fixing member according to claim 5, wherein the tapered surface of the fixing member main body has an inclined surface tapering from an outer surface to an inner surface of the fixing member main body according to claim 3 or 4, and the wedge piece. Is characterized in that an inclined edge conforming to the inclined surface is formed.
With such a configuration, even when vibrations due to an earthquake, a vehicle, or the like are transmitted to the fixing member and the wedge pieces in the branch pipe tub, the wedge pieces do not fall off inside the branch pipe tub and come off.
[0014]
The communication cable fixing method according to claim 6, wherein the communication cable or the sheath through which the communication cable is inserted inside the branch pipe tub located at the end of the branch pipe of the underground pipe where the branch pipe branches from the main pipe. A method for fixing a communication cable using a fixing member capable of holding and fixing a pipe in a tensioned state, wherein the communication cable is equal to the inner surface of the branch tube or the inner surface of the branch tube. A wedge piece is fitted to and attached to the dividing part of the fixing member main body having a deformable outer surface and having at least one or more dividing parts in the circumferential direction, and is attached to the inner surface of the fixing member main body or the wedge piece. The communication cable or the sheath tube through which the communication cable is inserted is fixed by the formed fastener.
According to such a method, by fixing the communication cable or the sheath tube through which the communication cable is inserted with the fastener formed on the inner surface of the fixing member main body or the wedge piece, the fastener is directly attached to the branch pipe vessel. Even if the branch pipe measure is small and it is difficult to perform the work without requiring an attaching operation, the communication cable or the sheath tube through which the communication cable is inserted can be easily fixed.
[0015]
The communication cable fixing method according to claim 7, wherein a tension is applied to the sheath pipe through which the communication cable is inserted inside the branch pipe box located at the end of the branch pipe in the underground pipe where the branch pipe branches from the main pipe. A method of fixing a communication cable using a fixing member that can be held and fixed in a state in which a branch pipe is added, the method being capable of being deformed to be equal to the inner surface of the branch tube or to be equal to the inner surface of the branch tube. A wedge piece is fitted and attached to the dividing part of the fixing member main body having an outer surface and having at least one or more dividing parts in the circumferential direction, and is formed on the inner surface of the fixing member main body or the wedge piece. The sheath tube through which the communication cable is inserted is loosely fitted to the fastener which is present and the biasing means located above the fastener, and the biasing means is provided by a tightening member attached to the sheath tube through which the communication cable is inserted. Compressed between the fasteners By applying tension to the sheath tube communication cable is inserted, it is characterized in that for holding the sheath tube by the communication cable is inserted through the upper portion of the branch pipe.
According to such a method, the sheath tube through which the communication cable is inserted is loosely fitted with the fastener formed on the inner surface of the fixing member main body or the wedge piece, and the biasing member is attached to the sheath tube by the fastening member with the fastener. By holding the tube while compressing it, tension is applied to the sheath tube, and it becomes possible to install the sheath tube through which the communication cable is inserted in the upper part of the main tube and the branch tube. Etc. can be prevented from being obstructed.
[0016]
The communication cable fixing method according to claim 8 is the method according to claim 6 or 7, wherein the dividing portion of the fixing member main body has a tapered surface that is tapered toward a lower side of the branch pipe, and the wedge is formed. The piece is formed with a tapered edge adapted to the tapered surface and fitted to the fixing member main body, and the fastener is formed on the fixing member main body.
According to such a method, the force for moving the fixing member body to the lower side of the branch pipe works from the communication cable or the sheath pipe through which the communication cable is inserted, so that the tapered surface bites into the tapered edge of the wedge piece. The fitting state with the wedge piece is further enhanced, and the outer periphery of the fixed member body is widened by the tapered surface of the fixed member body biting into the tapered edge of the wedge piece. The frictional force with the inner surface of the box increases, and the fixing and holding force of the fixing member main body and the wedge piece increases.
[0017]
According to a ninth aspect of the present invention, there is provided the communication cable fixing method according to the sixth or seventh aspect, wherein the dividing portion of the fixing member main body is formed with a tapered surface tapering toward a lower side of a branch pipe, and the wedge piece. Is characterized in that a tapered edge adapted to the tapered surface is formed and fitted to the fixing member main body, and a fastener is formed on the wedge piece.
According to such a method, the force for moving the wedge piece to the lower side of the branch pipe works from the communication cable or the sheath tube through which the communication cable is inserted, and the tapered edge cuts into the tapered surface of the fixing member main body. The fitting state with the fixing member main body is further enhanced, and the tapered edge of the wedge piece bites into the tapered surface of the fixing member main body, so that the outer periphery of the fixing member main body is widened and branched from the outer surfaces of the fixing member main body and the wedge piece. The frictional force with the inner surface of the tube becomes large, and the fixed holding force of the fixed member main body and the wedge piece is further increased.
[0018]
According to a tenth aspect of the present invention, in the communication cable fixing method according to the eighth or ninth aspect, the tapered surface of the fixing member main body has an inclined surface tapering from an outer surface to an inner surface of the fixing member main body, and the wedge is formed. The tapered edge of the piece is formed with an inclined edge adapted to the inclined surface, and the wedge piece is fitted to the fixing member main body.
According to such a method, even if vibration due to an earthquake or a vehicle is transmitted to the fixing member and the wedge piece in the branch pipe tub, the wedge piece does not fall off inside the branch pipe tub and come off.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings. In the following description, the underground pipeline will be described as a sewer pipe, but there is no particular limitation on the pipeline system and pipe type.
[0020]
FIG. 1 is a cross-sectional view schematically illustrating an example of an underground pipeline. In FIG. 1, reference numeral 1 denotes a main sewer pipe, which is provided between a manhole 2 and another manhole 3. Then, from the upper side of the main pipe 1, branch pipes 4 and 5 are branched at branch pipe ports 6 and 7, and the branch pipes 4 and 5 are connected to branch pipe squares 8 and 9 which are branch pipe ends for each household. Connected to.
[0021]
Generally, the main pipe 1 is laid at a depth of several meters along the road, and as shown in FIG. 5 is connected to branch pipes 8 and 9 at different angles from the branch pipe openings 6 and 7.
[0022]
In addition, the sewer system includes a split type in which rainwater is provided in a separate pipe, and a combined type in which rainwater and sewage are both passed. In these sewage systems, in the case of the split flow type, the installation pipe tub connected to the sewage installation pipe which is a branch pipe and the rainwater pit connected to the rainwater pipe correspond to the branch pipe tubs 8 and 9 of this embodiment. However, in the case of the confluence type, the mounting pipes correspond to the branch pipes 8 and 9 of this embodiment. In the case where the power cable is supplied to each home through an underground pipe, a power tub connected to the power pipe or the like corresponds to the branch pipe tubs 8 and 9 of the present embodiment and can be used. .
[0023]
Fig. 3 shows the situation of each basin as an example of sewerage. A drainage tub 35 connected to a drainage pipe 30 of a bathroom, a toilet, a kitchen, or the like of the house 20, a junction pit 34 for joining a drainage pipe 31 from the drainage pit 35, a drainage pipe 32, and branch pipe pits 8, 9. A connection basin 33 for connecting the drainage pipe 10 from the yard is often installed in the residential land as an inspection sewage basin. The present invention can also be applied to a case where the communication cable 18 or the sheath tube 16 into which the communication cable 18 is inserted is fixed by using a fixing member described later in these inspection wastewater basins. In particular, as a communication user, wiring the communication cable 18 underground to a position as close to the outer wall of the residential land as possible is less likely to cause a disconnection and has a high aesthetic value. In many cases, the communication cable 18 is laid using such a method.
[0024]
First, when laying a communication cable or the like in the main pipe 1, the distance between the manholes 2 and 3, the distance between the manholes 2, and each branch pipe 4 in the main pipe 1 using a TV camera or the like. 5, the distance from the branch pipes 4, 5 to the branch pipes 8, 9, the depth of the branch pipes 8, 9, etc. are accurately measured (see FIG. 1).
[0025]
Next, the communication cable 18 to the termination box of each house where the communication cable 18 is desired to be laid, and the sheath tube 16 into which the communication cable 18 is inserted are laid to the branch pipe boxes 8 and 9. Note that, in the present embodiment described below, a case will be described in which the communication cable 18 uses the sheath tube 16 that has been inserted in the sheath tube in advance, but the communication cable 18 itself can be similarly applied.
[0026]
In addition, as a method of laying the communication cable 18 and the sheath pipe 16 through which the communication cable 18 is inserted up to the branch pipes 8 and 9, a known method can be used. For example, a communication cable of about 24 to 200 cores is laid from a communication base into a main pipe in an underground conduit, and a connection branch box is used to connect each underground conduit to a manhole or the like in a manhole or the like. The communication cable of about 2 to 4 cores (more than that for multi-family housing) for laying to the end box is branched, and the communication cable is inserted into a sheath pipe (guide pipe) for protection of the communication cable and branched from the main pipe. It is laid to a branch pipe measure through a pipe.
[0027]
Referring to FIG. 1, an example of a method of laying a communication cable up to a branch pipe measure and a sheath pipe through which the communication cable is inserted will be described. The guide pipes) are installed with fixed members arranged at predetermined intervals, or a tension wire rope is inserted through the sheath pipe, and both ends of the wire rope are fixed in manholes 2 and 3 located at both ends of the sheath pipe. Then, tension can be applied to the tension wire rope so that the sheath tube can be installed in the upper portion of the main tube 1. A communication cable is inserted into a sheath tube installed at the upper part of the main tube 1, and holes are provided in the branch tubes 4 and 5 located between the manholes 2 and 3 at positions near the branch tube ports 6 and 7. Then, the communication cable taken out from the hole is laid to the branch pipe squares 8 and 9 located at the ends of the branch pipes. The laying of the communication cable up to the branch pipe measure and the sheath pipe through which the communication cable is inserted are not particularly limited.
[0028]
The communication cable laid to the branch pipes 8 and 9 and the sheath tube into which the communication cable is inserted are fixed in the branch pipes 8 and 9 by a fixing member described later. The communication cable can be guided to the termination box of each house.
[0029]
The communication cable 18 has a stainless steel tube as a tension material inside, a four-core optical fiber is passed through the stainless steel tube, and a cable having an outer surface covered with polyethylene resin and having a thickness of about 5 mm is used. In this embodiment, it can be suitably used. Note that, besides the 4-core type, the communication cable 18 may be a 2-core type or another type.
[0030]
As the sheath tube 16 through which the communication cable 18 is inserted, a sheath tube having a spiral shape made of stainless steel is preferably used in the present embodiment, but is not particularly limited, and a tube or spiral tube made of another material is used. Even a non-shaped one can be selected depending on the type of underground pipeline.
[0031]
As described above, the communication cable 18 laid in each of the branch pipe boxes 8 and 9 and the sheath pipe 16 into which the communication cable 18 is inserted are fixed by the fixing member 50 shown in FIG.
[0032]
FIG. 4 is a basic configuration diagram showing the configuration of the fixing member. In FIG. 4, the fixing member main body 11 has an outer surface which can be deformed so as to be equal to the inner surface of the branch pipes 8 and 9 or to be equal to the inner surface of the branch pipes 8 and 9. It has more than one dividing part 11A. Although the fixing member main body 11 shows an example having one dividing part 11A in the present embodiment, even if it has two or more dividing parts, the wedge pieces corresponding to the number of dividing parts, The number of dividing portions is not limited as long as the fixing member can be formed.
[0033]
Further, the wedge pieces 12 can be fitted to the dividing parts 11A of the fixing member main body 11, and the same number of wedge pieces 12 as the number of the dividing parts 11A of the fixing member main body 11 are required. Further, by providing two or more dividing portions 11A, the present invention can be applied to the case where the shape of the branch tube squares 8 and 9 is square.
[0034]
As the material of the fixing member main body 11 and the wedge piece 12, a molded product made of metal such as stainless steel, hard plastic such as PE, PP, PVC, engineering plastic, FRP or the like can be used. A molded product made of a hard plastic such as PE, PP, or PVC, which has good workability and is lightweight and inexpensive, is particularly suitable.
[0035]
A tapered surface 24A inclined with respect to the axial direction is formed at the dividing portion 11A of the fixing member main body 11, and a tapered edge 24B that fits the tapered surface 24A is formed at the wedge piece 12. . FIG. 4 illustrates a state where the tapered surface 24A is tapered downward (corresponding to the lower side of the branch pipe).
[0036]
The fastener 13 shown in FIG. 4 is a saddle-shaped fastener fixed to the wedge piece 12 with a screw 13B via a washer 13A, and a sheath tube 16 into which a communication cable 18 is inserted is formed so as to be freely fittable. . Note that the fastener 13 may be a fastener 13 that is fixed to the inner surface of the fixing member main body 11 with a screw 13B via a washer 13A and that the sheath tube 16 into which the communication cable 18 is inserted can be loosely fitted.
[0037]
In addition, the fastener 13 may be formed on the inner surface of the fixing member main body 11 or the wedge piece 12, and a fastener that can fix the communication cable 18 or the sheath tube 16 itself through which the communication cable 18 is inserted may be used. And is not particularly limited.
[0038]
In this manner, the fastener is formed on the fixing member main body 11 or the wedge piece 12 and the sheath tube 16 into which the communication cable 18 is inserted is fixed, thereby directly attaching the fastener 13 to the branch pipes 8 and 9. The communication cable 18 and the sheath tube 16 through which the communication cable 18 is inserted can be easily fixed even if the branch pipe boxes 8 and 9 are small and difficult to work.
[0039]
The tightening member 15 shown in FIG. 4 is a hollow tube, and the sheath tube 16 through which the communication cable 18 is inserted is inserted into the hollow tube, and the screw 15A formed on the tightening member 15 is screwed with the communication cable 18 by a screw 15A. Can fix the sheath tube 16 inserted therethrough.
[0040]
Further, when fixing the sheath tube 16 through which the communication cable 18 is inserted with the tightening member 15, the sheath tube 16 through which the communication cable 18 is inserted can be loosely fitted to the fixing member main body 11 or the wedge piece 12 so as to be loosely fit. The communication cable 18 is inserted through the fastener 13 and is inserted into the tightening member 15 via the washer 19A, the urging means 14 (spring, etc.) and the washer 19B, and the screw 15A formed on the tightening member 15 and the communication cable 18 is inserted through the screw 15A. The sheath tube 16 can be fixed.
[0041]
Further, a tapered surface 25A of the fixing member main body 11 shown in FIG. 5 is formed with an inclined surface 25A tapering from the outer surface to the inner surface, and a tapered edge 24B of the wedge piece 12 is provided with an inclined edge 25B adapted to the inclined surface 25A. By forming, there is no possibility that the wedge piece 12 will fall into the inside of the branch pipes 8 and 9. In addition, similar effects can be obtained by forming the support piece 21A as shown in FIG. 6 on the dividing portion 21B of the fixing member main body 21.
[0042]
The tapered inclined surface 25A is formed by a notch in which the outer surface on the notch side is longer than the inner surface. The inclined surface 25A corresponds to the dividing portion 11A of the fixing member main body 11, and corresponds to the inclined surface 25A tapering from the outer surface to the inner surface of the tapered surface 24A inclined with respect to the axial direction. A tapered edge 24B of the wedge piece 12 that is adapted to the tapered surface 24A of 11A and has a slope adapted to the inclined surface 25A is referred to as an inclined edge 25B.
[0043]
FIG. 7 illustrates an example of a distal end processing structure of the sheath tube through which the communication cable is inserted, and a terminal device 20 through which the communication cable 18 can penetrate is provided at the tip of the sheath tube 16 through which the communication cable 18 is inserted. It is attached to the end of the sheath tube 16 through which the communication cable 18 has been inserted. The terminal device 20 is a hollow tube, and a step 20D is provided on the inner surface of the terminal device 20 so as to fit a step between the end of the sheath tube 16 through which the communication cable 18 is inserted and the communication cable 18. When attaching the terminal device 20 to the end of the sheath tube 16 into which the communication cable 18 has been inserted, the gap between the communication cable 18 and the terminal device 20 is sealed with a clay-like airtight agent 20B, for example, epoxy mortar or the like. Water, insects, and the like do not enter the sheath tube 16 through which the cable 18 is inserted.
[0044]
Further, by sealing the gap between the sheath tube 16 through which the communication cable 18 has been inserted and the terminal device 20 with a clay-like airtight agent or the like, water, insects, etc. can be further inserted into the sheath tube 16 through which the communication cable 18 has been inserted. Can be prevented from entering. In the case where the sheath tube 16 into which the communication cable 18 is inserted has a spiral shape as shown in FIG. 7, a terminal device 20 having a screw thread 20 </ b> C fitted into a spiral groove is used. It is preferable to fix together with the screw 20A.
[0045]
The sheath tube 16 through which the communication cable 18 is inserted can be fixed in the branch tube casings 8 and 9 by the fixing member 50 configured as described above.
[0046]
FIG. 8 shows a basic structure diagram of a communication cable fixing structure in a branch pipe box. In FIG. 8, a branch pipe box in which branch pipes 4, 5 and a drain pipe 10 and a rising pipe 17 to the ground are connected. The fixing member 50 located in the riser pipes 8 and 9 holds and fixes the sheath pipe 16 through which the communication cable 18 laid in the branch pipes 4 and 5 is inserted under tension. Can be.
[0047]
As shown in FIG. 8, when the sheath tube 16 into which the communication cable 18 is inserted is installed in the upper part of the branch tubes 4 and 5, the inner surface of the wedge piece 12 fitted to the dividing portion 11A of the fixing member main body 11. A fastener 13 capable of loosely fitting the sheath tube 16 into which the communication cable 18 has been inserted is formed, and a biasing means 14 such as a spring is disposed above the fastener 13 so that the biasing means 14 is in a compressed state. By attaching the tightening member 15 held by the above to the sheath tube 16 through which the communication cable 18 is inserted, tension is generated in the sheath tube 16 through which the communication cable 18 is inserted, and the sheath tube 16 through which the communication cable 18 is inserted is connected to the branch tube. It becomes possible to install it on the upper part of 4 and 5.
[0048]
As an example of the embodiment, a fastener 13 is formed on the inner surface of the fixed member main body 11 so that the sheath tube 16 into which the communication cable 18 is inserted can be loosely fitted. Is mounted on the sheath tube 16 through which the communication cable 18 is inserted, and the tightening member 15 for holding the urging unit 14 in a compressed state is attached to the sheath tube 16 through which the communication cable 18 is inserted. At the upper part in the branch pipes 4 and 5.
[0049]
Further, a fastener 13 for fixing the sheath tube 16 through which the communication cable 18 is inserted is formed on the inner surface of the fixing member main body 11 or the wedge piece 12, so that the sheath tube 16 through which the communication cable 18 is inserted may be fixed. It is possible. Note that, depending on the shape of the branch pipes 8 and 9, the riser pipe 17 may not be necessary, but even in such a case, the inner shape of the branch pipes 8 and 9 is equal to or less than that of the branch pipes 8 and 9. , 9 having an outer surface that can be changed to be equal to the inner surface shape, and having at least one or more dividing portions 11A in the circumferential direction, and a wedge piece 12 fitted to the dividing portion 11A of the fixing member main body 11. This can be applied by using.
[0050]
When the above-mentioned communication cable 18 is fixed to the sheath tube 16 into which tension has been generated, the tapered surface 24A inclined with respect to the axial direction is formed in the dividing portion 11A of the fixing member main body 11. The wedge piece 12 is formed with a tapered edge 24B that fits the tapered surface 24A. When the tapered surface 24A is tapered toward the lower side of the branch pipes 8 and 9, the wedge piece 12 communicates with the inner surface of the fixed member main body 11. A fastener 13 is formed so that the sheath tube 16 into which the cable 18 is inserted can be loosely fitted, and a biasing means 14 such as a spring is disposed above the fastener 13 so that the fixing member main body 11 is attached. The compression of the urging means 14 exerts a force to move the branch pipes 8 and 9 downward, and the fitting force with the wedge piece 12 increases, which is preferable because the fixed state is further increased.
[0051]
When the tapered surface 24A of the fixing member main body 11 bites into the tapered edge 24B of the wedge piece 12, the outer periphery of the fixing member main body 11 is widened, and the outer surfaces of the fixing member main body 11 and the wedge piece 12 and the branch pipes 8, 9 are formed. When the inner surface or the riser pipe 17 is formed in the branch pipe boxes 8 and 9, the frictional force with the inner surface of the riser pipe 17 increases, and the fixing holding force of the fixing member main body 11 and the wedge piece 12 further increases.
[0052]
Further, by forming a fastener 13 for fixing the sheath tube 16 through which the communication cable 18 is inserted on the inner surface of the fixing member main body 11, the fixing member body 11 is branched by the sheath tube 16 through which the communication cable 18 is inserted. This is preferable because a force to move the cells 8 and 9 downward is exerted to increase the fitting force with the wedge piece 12 and further increase the fixed state.
[0053]
In the case where the tapered surface 24A is tapered toward the lower side of the branch pipes 8 and 9, a fastener 13 is formed on the inner surface of the wedge piece 12 so that the sheath pipe 16 into which the communication cable 18 is inserted can be loosely fitted. In addition, the urging means 14 such as a spring is disposed above the fastener 13, so that the wedge piece 12 has a force to move to the lower side of the branch pipes 8 and 9 by the compression of the urging means 14. It is preferable because the function and the fitting force with the fixing member main body 11 increase, and the fixing state increases.
[0054]
When the tapered edge 24B of the wedge piece 12 bites into the tapered surface 24A of the fixing member main body 11, the outer periphery of the fixing member main body 11 is widened, and the outer surfaces of the fixing member main body 11 and the wedge piece 12 and the branch pipes 8, 9 are formed. When the inner surface or the riser pipe 17 is formed in the branch pipe boxes 8 and 9, the frictional force with the inner surface of the riser pipe 17 increases, and the fixing holding force of the fixing member main body 11 and the wedge piece 12 further increases.
[0055]
Further, by forming a fastener 13 for fixing the sheath tube 16 through which the communication cable 18 is inserted on the inner surface of the wedge piece 12, the sheath tube 16 through which the communication cable 18 is inserted allows the wedge piece 12 to be split into the branch tube square 8. , 9 is preferably applied because a force to move downward acts to increase the fitting force with the fixing member main body 11 and further increase the fixing state.
[0056]
FIG. 9 shows an example in which the communication cable 18 fixed in the branch pipes 8 and 9 is led to each house. In the branch pipes 8 and 9, a communication pipe different from the drainage path is provided. 27 is connected, and the communication pipe 27 is connected to an underground box 28 which is a communication-only box formed near the outer wall. An ordinary pipe type is applied to the communication pipe 27, and a small underground box is also used for the underground box 28. The communication cable 18 passes through the underground box 28 and is connected to a home LAN cable by a termination box 26 provided on the outer wall. Further, when the communication cable 18 is guided to the vicinity of the outer wall only by the L-shaped communication pipe without forming the underground box 28, or when excavation work for installing such a communication pipe or the like is impossible, There are various methods such as building poles near the branch pipes 8 and 9 and once pulling up the communication cable 18 on the ground, guiding it overhead to the termination box 26, or connecting it to a home receiver wirelessly. No. The material and shape of the underground box 28 are not particularly limited.
[0057]
According to the above-described method of fixing the communication cable 18 or the sheath tube 16 through which the communication cable 18 is inserted, the communication cable 18 or the sheath tube 16 can be easily formed in the branch pipes 8 and 9 of each house where the communication cable 18 is laid. The communication pipe 18 or the sheath pipe 16 is laid on the upper side of the main pipe 1 and the branch pipes 4 and 5 in a state where the tension is maintained. The flow of the sewage and the like in 4, 5 can be prevented from being obstructed.
[0058]
【The invention's effect】
As described above, according to the present invention, the communication cable or the sheath tube through which the communication cable has been inserted can be held and fixed in a branch pipe tub under tension. In addition, there is an effect that the communication cable or the sheath tube through which the communication cable is inserted can be easily fixed even if the work is difficult in the branch tube.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view schematically illustrating an example of an underground pipeline.
FIG. 2 is a sectional view showing an arrangement state of a branch pipe.
FIG. 3 is a diagram showing a situation of each square as an example of a sewer.
FIG. 4 is a basic configuration diagram of one embodiment showing a configuration of a fixing member according to the present invention.
FIG. 5 is a top view of an embodiment of the fixing member main body and the wedge piece according to the present invention.
FIG. 6 is a perspective view showing a fixing member according to another embodiment of the present invention.
FIG. 7 is a basic configuration diagram of one embodiment showing a distal end processing configuration of a sheath tube through which a communication cable according to the present invention is inserted.
FIG. 8 is a basic structural diagram of an embodiment showing a fixing structure of a sheath tube through which a communication cable is inserted in a branch pipe box according to the present invention.
FIG. 9 is a schematic diagram showing an example of a communication cable laying state in each house according to the present invention.
FIG. 10 is a schematic diagram showing an example of a conventional communication cable fixing situation.
[Explanation of symbols]
4,5 branch pipe
8,9 Branch pipe measure
10 Drain pipe
11 Fixing member body
11A Dividing part
12 Wedge pieces
13 Fastener
14 biasing means (spring)
15 Tightening material
16 sheath tube
17 Rise pipe
18 Communication cable
24A tapered surface
24B slope
25A tapered edge
25B Inclined edge
50 Fixing member

Claims

Holding and fixing the communication cable or the sheath tube through which the communication cable is inserted under tension inside the branch pipe basin located at the end of the branch pipe where the branch pipe branches to the main pipe A fixing member that can be deformed to be equal to the inner surface of the branch tube or to be equal to the inner surface of the branch tube, and to have at least one or more dividing portions in the circumferential direction. A fixed member main body, a wedge piece fitted into the dividing portion of the fixed member main body, and a communication cable formed on the inner surface of the fixed member main body or the wedge piece or a sheath tube through which the communication cable is inserted. A fixing member in a branch pipe basin composed of a fixing fixture to be fixed.

It is possible to hold and fix the sheath pipe with the communication cable inserted under tension inside the branch pipe box located at the branch pipe end of the underground pipe where the branch pipe branches to the main pipe. A fixing member that can be fixed, has an outer surface that is deformable so as to be equal to the inner surface of the branch tube or equal to the inner surface of the branch tube, and has at least one or more dividing portions in the circumferential direction. A fastener that loosely fits a member main body, a wedge piece fitted into the dividing portion of the fixed member main body, and a sheath tube through which a communication cable formed on the inner surface of the fixed member main body or the wedge piece is inserted; A fixing member in the branch pipe box, comprising: urging means; and a tightening member for holding the sheath tube through which the communication cable is inserted in an urging state.

2. The dividing portion of the fixing member main body has a tapered surface inclined with respect to an axial direction thereof, and the wedge piece has a tapered edge adapted to the tapered surface. Or the fixing member in the branch pipe measuring vessel of 2.

The fastener according to claim 3, wherein a fastener is formed on the wedge piece.

The tapered surface of the fixing member main body has an inclined surface tapering from the outer surface to the inner surface of the fixing member main body, and the tapered edge of the wedge piece has an inclined edge adapted to the inclined surface. The fixing member in the branch tube according to claim 3 or 4, wherein

Holding and fixing the communication cable or the sheath tube through which the communication cable is inserted under tension inside the branch pipe basin located at the end of the branch pipe where the branch pipe branches to the main pipe A method for fixing a communication cable using a fixing member, the outer surface being deformable to be equal to the inner surface of the branch tube or the inner surface of the branch tube, and in the circumferential direction. A wedge piece is fitted and attached to the dividing part of the fixing member main body having at least one or more dividing parts, and the communication cable or the fastener is formed on an inner surface of the fixing member main body or the wedge piece. A method of fixing a communication cable in a branch pipe box, comprising fixing a sheath tube through which the communication cable is inserted.

It is possible to hold and fix the sheath pipe with the communication cable inserted under tension inside the branch pipe box located at the branch pipe end of the underground pipe where the branch pipe branches to the main pipe. A method for fixing a communication cable using a fixing member capable of being equal to the inner surface of the branch tube or having an outer surface deformable to be equal to the inner surface of the branch tube, and at least one circumferential position. A wedge piece is fitted to and attached to the dividing part of the fixing member main body having the above-mentioned dividing part, and a fastener formed on the inner surface of the fixing member main body or the wedge piece and an upper part of the fastener. To the urging means, the sheath tube through which the communication cable is inserted is loosely fitted, and the urging means is compressed between the fastener and the fastener by a tightening member attached to the sheath tube through which the communication cable is inserted. Tension is applied to the sheath tube through which the communication cable is inserted. Is allowed, the communication cable fixing method of the branch pipe 桝内, characterized in that for holding the sheath tube by the communication cable is inserted through the upper portion of the branch pipe.

The fixed member main body has a tapered surface that is tapered toward the lower side of the branch pipe tub, and the wedge piece has a tapered edge that matches the tapered surface. The method for fixing a communication cable in a branch tube according to claim 6 or 7, wherein the fastener is fitted to the fixing member main body and the fastener is formed on the fixing member main body.

A tapered surface tapering toward the lower side of the branch tube is formed at the dividing portion of the fixing member main body, and a tapered edge adapted to the tapered surface is formed on the wedge piece, so that the fixing member main body is formed. The method of fixing a communication cable in a branch tube according to claim 6 or 7, wherein a fitting is fitted and a fastener is formed on the wedge piece.

The tapered surface of the fixing member main body is formed with an inclined surface tapering from the outer surface to the inner surface of the fixing member main body, and the tapered edge of the wedge piece is formed with an inclined edge adapted to the inclined surface, The method for fixing a communication cable in a branch tube according to claim 8 or 9, wherein the wedge piece is fitted to the fixing member main body.