JP2004102488A - Telephone system for fire alarm facility - Google Patents

Telephone system for fire alarm facility Download PDF

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Publication number
JP2004102488A
JP2004102488A JP2002261162A JP2002261162A JP2004102488A JP 2004102488 A JP2004102488 A JP 2004102488A JP 2002261162 A JP2002261162 A JP 2002261162A JP 2002261162 A JP2002261162 A JP 2002261162A JP 2004102488 A JP2004102488 A JP 2004102488A
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Japan
Prior art keywords
telephone
receiver
line
lines
call
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JP2002261162A
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Japanese (ja)
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JP3803077B2 (en
Inventor
Mitsuhiro Kurimoto
栗本 光広
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Hochiki Corp
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Hochiki Corp
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  • Telephone Function (AREA)
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a telephone system for fire alarm facility guaranteeing a high talking quality by suppressing an external noise to a minimum even if the talk systems have increased. <P>SOLUTION: In the telephone system for fire alarm facility, a receiver 1 is equipped with a telephone set circuit part 14 in which the receiver side telephone set 13 is connected to one end and branch lines 15-1 to 15-n leading to the telephone external lines 2-1 to 2-n belonging to a plurality of systems are connected commonly with the other end, a plurality of switch circuit parts 16-1 to 16-n provided on the respective branch lines from the telephone set circuit part 14, and a plurality of telephone connection sensing parts 17-1 to 17-n which are provided on the respective branch lines leading from the switch circuit parts 16-1 to 16-n to the telephone external lines 2-1 to 2-n and put on the applicable switch circuit part 16-1 to generate connection with the telephone circuit part 14 when sensing is made for insertion and connection of the telephone set 6 into/with a telephone jack 5 in connection with the telephone external line 2-1. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、受信機から引き出された電話外線の電話ジャックに対する電話器の挿入接続を受信機側で検出して受信機側電話器と通話を行う火災報知設備の電話装置に関する。
【0002】
【従来の技術】
従来、火災報知設備の電話装置としては、例えば図5のものが知られている。図5は、火災報知設備の電話装置の系統を取り出しており、受信機100からは例えば火災監視系統毎に電話外線102−1〜102−nが引き出され、電話外線102−1〜102−nの各々に、1又は複数の電話ジャック104を接続している。
【0003】
電話ジャック104は警戒区域に設置された火災発信機や表示盤に設けられており、例えば電話外線102−1の終端の電話ジャック104のように、ここに電話器106を挿入接続して受信機100側と通話することができる。
【0004】
受信機100には、電話器回路部108と電話接続検出部110が設けられている。電話回路部108は一端に電話ジャック112を接続し、ここに受信機用電話器114が挿入接続される。電話器回路部108の他端は通話接続検出部110に接続され、通話接続検出部110は電話外線102−1〜102−nを分岐接続している。
【0005】
受信機100側と通話を行いたい場合には、例えば電話外線102−1のように電話ジャック104に監視要員などが携帯している電話器106を挿入接続すると、受信機100の電話接続検出部110で電話器106の挿入接続が検出され、図示しない受信制御部側に検出信号を出力し、ブザーを鳴らすと共に表示灯を点滅して通話呼出を行う。
【0006】
この通話呼出に対し、管理者などは受信機100に設置してある受信機用電話器114を電話ジャック112に挿入接続することで、端末側の電話器106との間で通話ができる。
【0007】
【特許文献1】
特開平4−348498号公報
【特許文献2】
特開平5−336261号公報
【特許文献3】
特開平9−81870号公報
【0008】
【発明が解決しようとする課題】
しかしながら、このような従来の火災報知設備の電話装置にあっては、受信機100に対し電話外線102−1〜102−nをすべて共通に接続していたため、例えば電話外線102−1の系統の電話器106で通話を行っている場合、残りの電話外線102−2〜102−nの外来ノイズが全て通話中の電話外線102−1の系統に加わり、通話連絡中に外来ノイズが聞こえ、非常に耳障りであった。
【0009】
本発明は、通話系統が増加しても外来ノイズを最小限に抑えて高い通話品質を保証する火災報知設備の電話装置を提供することを目的とする。
【0010】
【課題を解決するための手段】
この目的を達成するため本発明は次のように構成する。本発明は、受信機から引き出された複数系統の電話外線毎に1又は複数の電話ジャックを接続し、電話ジャックに電話器を挿入接続したことを受信機側で検出して受信機用電話器と通話を行う火災報知設備の電話装置を対象とする。
【0011】
このような火災報知設備の電話装置として本発明にあっては、受信機に、受信機側電話器を一端に接続すると共に複数系統の電話外線に至る分岐線を他端に共通接続し、電話外線の電話ジャックに対する電話器の挿入接続を検出して通話呼出を行わせる電話器回路部と、電話器回路部からの分岐線の各々に設けられた複数のスイッチ回路部と、複数のスイッチ回路部から電話外線に至る分岐線の各々に設けられ、電話外線に接続している電話ジャックに対する電話器の挿入接続を検出した際に、該当するスイッチ回路部をオンして電話回路部に接続する複数の電話接続検出部とを備えたことを特徴とする。
【0012】
ここでスイッチ回路部と電話接続検出部を、複数の電話回線を1つに取りまとめた分岐線に設けるようにしても良い。
【0013】
このような本発明による火災報知設備の電話装置によれば、受信機内の電話器回路部に対し分岐接続された電話外線側は、電話外線の電話ジャックに対する電話器の挿入接続を検出しない非通話時にあっては、各分岐線に設けたスイッチ回路部をオフにして電話器回路部から切り離しており、電話外線の電話ジャックに対する電話器の挿入接続を電話接続検出部で検出した場合に、該当するスイッチ回路部のみをオンして接続を検出した電話外線を電話器回路部に接続することとなり、通話が行われない他の電話外線は切り離し状態にあるために、外来ノイズが混入してくることはなく、電話外線を多数系統に引き出していても、外来ノイズが系統の増加により増えることは無く、耳障りな外来ノイズに影響されることなく、明瞭に通話できる。
【0014】
【発明の実施の形態】
図1は本発明の電話装置が適用される火災報知設備の説明図である。図1において、本発明の火災報知設備は、管理人室などに設置された受信機1から警戒区域に対し線路2として、電源線V、伝送線S、伝送コモン線SC、電話線T及び電話コモン線TCを引き出している。ここで電話コモン線TCは、電源線Vと電話線Tに対するコモン線となる。
【0015】
受信機1から引き出された電話外線2に対しては感知器用中継器3が複数台設置されている。本発明の火災報知設備にあっては、受信機1は感知器用中継器3に設定した端末アドレスの指定により呼出しなどのコマンドを送信して応答情報を受信しており、受信機1に対しては端末アドレスの設定可能数分だけの感知器用中継器3を接続することができ、大規模な火災報知設備にあっては受信機1に対し数百台といった感知器用中継器3が接続される。
【0016】
感知器用中継器3からは複数の感知器線L1〜Lnと感知器コモン線LCが引き出され、各感知器線L1〜Lnとの感知器コモン線LCとの間にオン、オフ型の火災感知器4を接続している。
【0017】
なお、この例では、感知器線L1〜Lnのそれぞれに1台の火災感知器4を接続した場合を例にとっているが、必要に応じて複数台の火災感知器4が各感知器線ごとに接続される。また、感知器線L1〜Lnの終端には断線検出のための終端器を接続するが、これは省略している。
【0018】
一方、感知器用中継器3が設置されている警戒区域には、受信機1と現場との間で通話連絡を行うため電話ジャック5が設けられている。この電話ジャック5は具体的には、警戒区域に設置されている火災発信器や表示盤などに設けられることになる。
【0019】
電話ジャック5の一端には受信機1から引き出された電話線Tが接続され、電話ジャック5の他端は電話コモン線TCにより感知器用中継器3から引き出された感知器コモン線LCに接続され、この感知器コモン線LCには受信機1から引き出された電話コモン線TCが接続される。
【0020】
受信機1には、監視制御部として機能する受信機用MPU7、伝送回路部8、操作部9、表示部10、通話制御部11、電話ジャック12が設けられる。電話ジャック12に対しては、通話の際には受信機用電話器13が挿入接続される。
【0021】
受信機1からの伝送線Sと伝送コモン線SCの間には、電源電圧と同時に伝送回路部8からの下り信号及び感知器用中継器3からの上り信号が重畳される。ここで受信機1の伝送回路部8からの下り信号は、電源線を兼ねる伝送線Sと伝送コモン線SC間に電圧信号として重畳させている。また感知器用中継器3からの上り信号は、伝送線Sと伝送コモン線SC間に流れる線路電流を変化させることで送信している。
【0022】
受信機1の伝送回路部8は、通常の監視状態にあっては、感知器用中継器3の端末アドレスを順番に指定した呼出コマンドを含む呼出信号を送信しており、この呼出信号は感知器用中継器3で受信され、受信した呼出信号から呼出アドレスを抽出して、予め設定された自己アドレスと比較し、アドレス一致を判別したときに、そのときの感知器用中継器3における状態信号を線路電流の変化として受信機1に送出する。
【0023】
受信機1からの呼出信号に対する感知器用中継器3の応答信号としては、例えば8ビットの応答データ中の特定のビットに対応して、正常、障害、火災などの検出状態を設定し、対応する状態ビットを立てることで応答信号を受信機に返す。
【0024】
また火災検出時にあっては、受信機1に火災割込信号を送出し、受信機1において火災割込処理を行わせる。即ち受信機1は、感知器用中継器3から火災割込信号を受信すると、火災を検出している感知器用中継器3のアドレスを検索するためのアドレス検索処理を実行して、火災を検出した感知器用中継器3を特定し、特定したアドレスの感知器用中継器3に対し継続的に呼出信号を送って火災検出情報の応答を得るようになる。
【0025】
更に受信機1の伝送回路部8にあっては、感知器用中継器3に対する呼出信号の転送と並行して、一定周期例えば1分間隔で断線検出制御信号を送信しており、この断線検出制御信号を受けて感知器線L1〜Lnと感知器コモン線LC間の断線検出動作を行わせる。この断線検出動作による検出結果は、断線検出処理が終了した後の次の呼出信号に対する応答信号により送り返される。
【0026】
受信機1の受信機用MPU7は、伝送回路部8により感知器用中継器3との間の伝送制御で得られた感知器用中継器3に関する情報に基づいて、火災受信処理や障害発生処理などの監視制御を行う。この受信機用MPU7に対しては操作部9と表示部10が設けられており、火災表示や障害表示に加え、それぞれの表示に必要な操作入力を行うようにしている。
【0027】
更に通話制御部11は、端末側の電話ジャック5に図示のように電話器6が挿入接続されると、このとき電話線Tと電話コモン線TC間の電圧変化等を検出して通話接続を認識し、受信機用MPU7に通話呼出動作を行わせる。
【0028】
通話呼出しがあったならば、管理者は受信機1に設置されている受信機用電話器13を取り出して電話ジャック12に接続することで、端末側の電話器6との間で通話を行うことができる。
【0029】
図2は図1の火災報知設備における本発明の電話装置の部分を取り出して示した説明図である。図2において、図1の通話制御部11に相当する回路部は、電話器回路部14、スイッチ回路部16−1〜16−n及び電話接続検出部17−1〜17−nで構成される。
【0030】
電話器回路部14は、一端に電話ジャック12を介して受信機用電話器13を挿入接続できるようにしており、他端には電話外線2−1〜2−nを接続した分岐線15−1〜15−nを共通に接続している。
【0031】
電話外線2−1〜2−nに繋がる分岐線15−1〜15−nのそれぞれには2回路のリレー接点を備えたスイッチ回路部16−1〜16−nが挿入接続され、これに続いて電話外線側に電話接続検出部17−1〜17−nを挿入接続している。
【0032】
電話接続検出部17−1〜17−nは、例えば電話接続検出部17−1を例にとると、端末側に引き出している電話外線2−1に設けている2つの電話ジャック5の内、例えば終端に接続している電話ジャック5に対し電話器6を挿入接続した際に、この電話器6の挿入接続における例えば電話外線2−1の電圧変化を検出して、電話器6の挿入接続を検出する。
【0033】
電話接続検出部17−1で電話器6の挿入接続を検出すると、対応するスイッチ回路部16−1の2回路のリレー接点をオンし、電話器6を挿入接続した電話外線2−1を分岐線15−1を介して電話器回路部14に接続する。
【0034】
電話器回路部14は、電話接続検出部17−1による電話器6の挿入接続に基づいてスイッチ回路部16−1がオンして、分岐線15−1を介して電話器6の接続状態が得られると、同じく電話器6の接続による信号線間の電圧変化を検出し、図1の受信機用MPU7に対する電話接続検出信号の出力で表示部10に対し電話呼出しのための表示とブザーの鳴動を行わせる。
【0035】
この電話器回路部14の通話接続検出信号による呼出しを受けて、管理人が受信機1に設置されている受信機用電話器13を電話ジャック12に接続すると、端末側の電話器6と受信機用電話器13との間に通話回路が形成され、両者の間で通話を行うことができる。
【0036】
このとき電話ジャック5に電話器6の接続が行われていない他の電話外線2−2〜2−n側にあっては、それぞれの電話接続検出部17−2〜17−nが電話器6の挿入接続を検出していないため、スイッチ回路部16−2〜16−nにおける2回路のリレー接点を全てオフとしている。
【0037】
このため、電話器6の挿入接続時、電話器回路部14を介して受信機用電話器13に加わる外来ノイズは電話器6の挿入接続を行っている電話器回路部2−1のみの外来ノイズとなり、通話接続を行っていない他の電話外線2−2〜2−nは切り離し状態にあることから、その外来ノイズを受けることがなく、受信機1からn系統の電話外線を引き出していても、通話時の外来ノイズをごく小さくでき、明瞭に通話を行うことができる。
【0038】
図3は図2の電話器回路部14、スイッチ回路部16−1及び電話接続検出部17−1の具体的な回路構成の実施形態である。
【0039】
図3において、電話外線2−1に対応して設けられた電話接続検出部17−1は、電源電圧Vcとして例えば+24ボルトを抵抗R1を介して電話外線2−1に供給している。
【0040】
電話外線2−1の他方の線は抵抗R4を介してアースされると共に、スイッチ回路16−1のリレー接点19bに接続される。抵抗R1を介して電話外線2−1側に供給された線路電圧は、抵抗R2,R3で分圧されて比較部18に入力されている。
【0041】
比較部18には所定の閾値が設定されており、電話ジャック5に対する電話器6の挿入接続で電話外線2−1の線間電圧が低下すると、これを比較部18で検出し、リレー19を駆動してスイッチ回路部16−1のリレー接点19a,19bを閉じる。
【0042】
スイッチ回路部16−1のリレー接点19a,19bに対するラインは、電話接続検出部17−1における抵抗R1,R4の間から分岐線15−1として取り出されており、電話器回路部14の入力段で他の電話外線側からの分岐線に共通接続される。
【0043】
電話器回路部14は電源電圧Vcを抵抗R5を介して、受信機用電話器13が接続される電話ジャック12からの電話外線に電源を供給しており、この電話外線はカップリング用のコンデンサC1を介してスイッチ回路部16−1からの分岐線15−1と接続される。またリレー接点19bにはコンデンサC2を介して電話ジャック12に接続されると共に抵抗R6を介してアースされる。
【0044】
また電話器回路部14のスイッチ回路部16−1側には通話呼出検出部20が設けられており、電話接続検出部17−1と同様、スイッチ回路部16−1のリレー接点19a,19bのオンで得られた電話外線2−1側の線間電圧を予め設定した閾値と比較し、電話器6の通話接続を検出して、図1の受信機用MPU7に通話接続検出信号を出力し、表示部10によるブザーと表示灯の点灯で通話呼出しを行わせる。
【0045】
なお、抵抗R1、R4、R5、R6の抵抗値は同じ値であり、コンデンサC1とC2も同じ値であるが、回路的なバランスが良く、ノイズを抑えることができる。また、抵抗R2、R3の抵抗値は抵抗R1、R4、R5、R6にりも充分大きく設定している。
【0046】
次に図3における動作を説明する。電話ジャック5に電話器6を挿入接続すると、電話外線2−1の電圧が変化し、電話接続検出部17−1の比較部18に抵抗R2、R3を介してこの線路電圧の変化を検出する。
【0047】
比較器18が線路電圧変化を検出するとリレー19を作動して、スイッチ回路部16−1のリレー接点19a,19bがオンする。リレー接点19a,19bのオンで電話外線2−1側の線間電圧が電話器回路部14の通話呼出検出部20に入力される。
【0048】
通話呼出検出部20は、線間電圧を予め設定した閾値と比較して、電話器6からの通話を検出し、受信機用MPU7に通話接続検出信号を出力し、表示部10によるブザーと表示部の点灯で通話呼出しを行わせる。
【0049】
受信機付近にいる管理人は、ブザーの鳴動により、受信機1に設置されている受信機用電話器13を電話ジャック12に接続すると、端末側の電話器6と受信機用電話器13との間に通話回路が形成され、両者間で通話を行なうことができる。
【0050】
このときは、電話ジャック5に電話器6の接続が行なわれていない他の電話外線2−2〜2−n側にあっては、スイッチ回路部16−2〜16−nがオフしており、通話接続を行なっていない他の電話外線は切り離し状態にあることから、その外来ノイズを受けることがなく、明瞭に通話を行うことができる。
【0051】
図4は本発明による電話装置の他の実施形態であり、図2の実施形態と同様、受信機1に設けた電話装置の部分のみを取り出して示している。この図4の実施形態にあっては、受信機1から引き出している電話外線2−1,2−2,2−3,2−4,…を例えば2回線を1つの系統にまとめたことを特徴とする。
【0052】
即ち、受信機1から引き出された電話外線2−1,2−2の2回線を1つにまとめて電話接続検出部17−1に接続し、また電話外線2−3,2−4の2回線を電話接続検出部17−2に共通接続している。
【0053】
このように電話器6の挿入接続を検出する系統を複数の電話外線を1つにまとめて行うことで、受信機1側に設けるスイッチ回路部16−1,16−2,…及び電話接続検出部17−1,17−2,…の数を、例えば電話外線の数をn回線とした場合、図2の場合にはn回路必要であるが、図4の場合には半分の回路数に低減することができる。もちろん1つの系統にまとめる電話外線の数としては、合成された外来ノイズが通話品質を損なうことのない規定レベル以下となる条件を満足するように1系統にまとめる電話外線の数を決める。
【0054】
なお上記の実施形態は受信機からの呼出により情報を収集するR型の火災報知設備を例に取るものであったが、本発明はこれに限定されず、監視系統が多数となり、この多数の監視系統ごとに電話外線を設ける火災報知設備であれば、適宜の火災報知設備につき、そのまま適用することができる。
【0055】
また本発明は上記の実施形態に限定されず、その目的と利点を損なうことのない適宜の変形を含み、更に実施形態に示した数値による限定は受けない。
【0056】
【発明の効果】
以上説明してきたように本発明によれば、受信機から引き出された電話外線の内、端末側で電話器の挿入接続を電話ジャックに対して行った電話外線のみが、電話接続検出回路、スイッチ回路部を介して、受信機内の電話器回路部に接続されて、受信機用電話器との間で通話回路を形成することとなり、電話器の挿入接続が行われていない他の電話外線については切り離し状態にあるため、電話器の挿入接続が行われていない電話外線から外来ノイズが混入してくることはなく、従来、n回線の電話外線を共通接続していた場合に比べ、本発明によれば外来ノイズを1/nとでき、外来ノイズを十分に低減し、現場と受信機との間の通話が外来ノイズの影響に妨げられることなく明瞭に行うことができる。
【図面の簡単な説明】
【図1】本発明の電話装置が適用される火災報知設備の説明図
【図2】本発明の基本的な実施形態の説明図
【図3】電話外線の2回線を1系統とした本発明の他の実施形態の回路図
【図4】本発明の受信機内に設けられる電話装置の回路図
【図5】火災報知設備のおける従来の電話装置の部分を取り出して示した説明図
【符号の説明】
1:受信機
2:電話外線
3:感知器用中継器
4:火災感知器
5,12:電話ジャック
6,13:電話器
7:受信機用MPU
8:伝送回路部
9:操作部
10:表示部
11:通話制御部
13:受信機用電話器
14:電話器回路部
15−1〜15−n:分岐線
16−1〜16−n:スイッチ回路部
17−1〜17−n:電話接続検出部
18:比較部
20:通話呼出検出部
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a telephone device of a fire alarm system that performs a telephone call with a telephone set on the receiver side by detecting the insertion connection of the telephone set into a telephone jack of a telephone outside line drawn out from the receiver.
[0002]
[Prior art]
Conventionally, as a telephone device of a fire alarm system, for example, a telephone device shown in FIG. 5 is known. FIG. 5 shows a telephone system of the fire alarm system. Telephone external lines 102-1 to 102-n are pulled out from the receiver 100 for each fire monitoring system, for example, and telephone external lines 102-1 to 102-n. Is connected to one or more telephone jacks 104.
[0003]
The telephone jack 104 is provided on a fire transmitter or a display panel installed in a guard area. For example, like the telephone jack 104 at the end of the telephone outside line 102-1, the telephone 106 is inserted and connected to the receiver. You can talk to the 100 side.
[0004]
The receiver 100 is provided with a telephone circuit unit 108 and a telephone connection detection unit 110. The telephone circuit unit 108 has a telephone jack 112 connected at one end, and a telephone 114 for a receiver is inserted and connected thereto. The other end of the telephone circuit unit 108 is connected to a call connection detection unit 110, and the call connection detection unit 110 branches and connects the telephone outside lines 102-1 to 102-n.
[0005]
When a telephone call with the receiver 100 is desired, a telephone 106 carried by a monitoring person or the like is inserted and connected to the telephone jack 104 like the telephone outside line 102-1. At 110, the insertion connection of the telephone set 106 is detected, and a detection signal is output to the reception control unit (not shown) to sound a buzzer and blink a display lamp to make a telephone call.
[0006]
In response to the call, the administrator or the like can make a call with the telephone 106 on the terminal side by inserting and connecting the receiver telephone 114 installed in the receiver 100 to the telephone jack 112.
[0007]
[Patent Document 1]
JP-A-4-348498 [Patent Document 2]
JP-A-5-336261 [Patent Document 3]
JP-A-9-81870
[Problems to be solved by the invention]
However, in such a conventional telephone device of a fire alarm system, since the telephone outside lines 102-1 to 102-n are all connected to the receiver 100 in common, for example, the system of the telephone outside line 102-1 is used. When a telephone call is being made using the telephone 106, all the external noise of the remaining telephone external lines 102-2 to 102-n is added to the system of the telephone external line 102-1 during the telephone call, and the external noise is heard during the communication of the telephone call. Was harsh.
[0009]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a telephone device of a fire alarm system that guarantees high communication quality by minimizing external noise even when the number of communication systems increases.
[0010]
[Means for Solving the Problems]
To achieve this object, the present invention is configured as follows. The present invention relates to a telephone set for a receiver, in which one or more telephone jacks are connected to each of a plurality of telephone outside lines drawn from a receiver, and the receiver side detects that the telephone set is inserted and connected to the telephone jack. This is intended for telephone equipment of fire alarm equipment that makes telephone calls.
[0011]
In the present invention as a telephone device of such fire alarm equipment, in the present invention, a receiver, a receiver side telephone is connected to one end, and a branch line to a plurality of telephone external lines is commonly connected to the other end, and the telephone A telephone circuit unit for detecting a connection of a telephone to an external telephone jack and making a telephone call, a plurality of switch circuits provided on each branch line from the telephone circuit unit, and a plurality of switch circuits The switch circuit unit is turned on to connect to the telephone circuit unit when the insertion connection of the telephone to the telephone jack connected to the telephone line is detected. And a plurality of telephone connection detection units.
[0012]
Here, the switch circuit unit and the telephone connection detection unit may be provided on a branch line that combines a plurality of telephone lines into one.
[0013]
According to the telephone apparatus of the fire alarm system according to the present invention, the telephone outside line branch-connected to the telephone circuit section in the receiver does not detect the non-calling connection of the telephone to the telephone jack of the telephone outside line. Occasionally, the switch circuit provided on each branch line is turned off and disconnected from the telephone circuit, and when the telephone connection detection unit detects the insertion connection of the telephone to the telephone jack of the telephone outside line, this corresponds to Only the switch circuit unit to be turned on is connected to the telephone line which has detected the connection to the telephone circuit unit, and other telephone lines that do not carry out a call are in a disconnected state, so that external noise is mixed in. Even if the telephone outside line is extended to many systems, external noise does not increase due to the increase in the number of systems, making it possible to talk clearly without being affected by harsh external noise. .
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is an explanatory view of a fire alarm system to which the telephone device of the present invention is applied. In FIG. 1, the fire alarm system of the present invention includes a power supply line V, a transmission line S, a transmission common line SC, a telephone line T, and a telephone line 2 as a line 2 from a receiver 1 installed in an administrator room or the like to a guard area. The common line TC is drawn. Here, the telephone common line TC is a common line for the power supply line V and the telephone line T.
[0015]
A plurality of sensor repeaters 3 are provided for the telephone outside line 2 drawn from the receiver 1. In the fire alarm system of the present invention, the receiver 1 transmits a command such as a call by designating the terminal address set in the sensor repeater 3 and receives response information. Can connect the number of repeaters 3 for the number of terminals that can be set to the terminal address. In a large-scale fire alarm system, several hundred repeaters 3 for the detector are connected to the receiver 1. .
[0016]
A plurality of sensor lines L1 to Ln and a sensor common line LC are drawn from the sensor repeater 3, and an ON / OFF type fire detection is provided between each of the sensor lines L1 to Ln and the sensor common line LC. Unit 4 is connected.
[0017]
In this example, a case where one fire detector 4 is connected to each of the detector lines L1 to Ln is taken as an example, but a plurality of fire detectors 4 may be provided for each detector line as necessary. Connected. A terminator for disconnection detection is connected to the ends of the sensor lines L1 to Ln, but this is omitted.
[0018]
On the other hand, a telephone jack 5 is provided in the guard area where the repeater 3 for the sensor is installed, for performing communication between the receiver 1 and the site. Specifically, the telephone jack 5 is provided on a fire transmitter, a display panel, or the like installed in the guard area.
[0019]
One end of the telephone jack 5 is connected to a telephone line T drawn from the receiver 1, and the other end of the telephone jack 5 is connected to a sensor common line LC drawn from the sensor repeater 3 by a telephone common line TC. The telephone common line TC drawn from the receiver 1 is connected to the sensor common line LC.
[0020]
The receiver 1 is provided with a receiver MPU 7 functioning as a monitoring control unit, a transmission circuit unit 8, an operation unit 9, a display unit 10, a call control unit 11, and a telephone jack 12. A telephone 13 for a receiver is inserted and connected to the telephone jack 12 during a call.
[0021]
Between the transmission line S from the receiver 1 and the transmission common line SC, a down signal from the transmission circuit unit 8 and an up signal from the sensor repeater 3 are superimposed simultaneously with the power supply voltage. Here, the downstream signal from the transmission circuit unit 8 of the receiver 1 is superimposed as a voltage signal between the transmission line S also serving as a power supply line and the transmission common line SC. The upstream signal from the sensor repeater 3 is transmitted by changing the line current flowing between the transmission line S and the transmission common line SC.
[0022]
In the normal monitoring state, the transmission circuit unit 8 of the receiver 1 transmits a paging signal including a paging command in which the terminal addresses of the sensor repeaters 3 are sequentially specified. The paging address is extracted from the received paging signal received by the repeater 3 and compared with a preset self-address. When the address coincidence is determined, the state signal in the repeater 3 for the sensor at that time is transmitted to the line. The change is sent to the receiver 1 as a change in current.
[0023]
As a response signal of the sensor repeater 3 to the call signal from the receiver 1, for example, a detection state such as normal, failure, or fire is set and corresponded to a specific bit in 8-bit response data. A response signal is returned to the receiver by setting the status bit.
[0024]
When a fire is detected, a fire interrupt signal is sent to the receiver 1 so that the receiver 1 performs a fire interrupt process. That is, when receiving the fire interrupt signal from the sensor repeater 3, the receiver 1 executes an address search process for searching for the address of the sensor repeater 3 that has detected the fire, and detects the fire. The repeater for sensor 3 is specified, and a call signal is continuously transmitted to the repeater for sensor 3 at the specified address to obtain a response of fire detection information.
[0025]
Further, the transmission circuit section 8 of the receiver 1 transmits a disconnection detection control signal at a constant period, for example, every one minute, in parallel with the transfer of the calling signal to the sensor repeater 3. Upon receiving the signal, a disconnection detection operation between the sensor lines L1 to Ln and the sensor common line LC is performed. The result of the disconnection detection operation is returned by a response signal to the next call signal after the disconnection detection processing is completed.
[0026]
The receiver MPU 7 of the receiver 1 performs a fire reception process, a failure occurrence process, and the like based on information about the sensor repeater 3 obtained by the transmission control with the sensor repeater 3 by the transmission circuit unit 8. Perform monitoring control. An operation unit 9 and a display unit 10 are provided for the MPU 7 for the receiver, and an operation input necessary for each display is performed in addition to a fire display and a failure display.
[0027]
Further, when the telephone 6 is inserted and connected to the telephone jack 5 on the terminal side as shown in the figure, the telephone control unit 11 detects a voltage change or the like between the telephone line T and the telephone common line TC at this time and disconnects the telephone connection. It recognizes and makes the MPU 7 for the receiver perform a call operation.
[0028]
If there is a call, the manager takes out the receiver telephone 13 installed in the receiver 1 and connects it to the telephone jack 12 to make a telephone call with the telephone 6 on the terminal side. be able to.
[0029]
FIG. 2 is an explanatory view showing a part of the telephone device of the present invention in the fire alarm system shown in FIG. 2, a circuit unit corresponding to the call control unit 11 in FIG. 1 includes a telephone circuit unit 14, switch circuit units 16-1 to 16-n, and telephone connection detection units 17-1 to 17-n. .
[0030]
The telephone circuit section 14 is configured such that the receiver telephone 13 can be inserted and connected at one end through the telephone jack 12, and a branch line 15- connected to the telephone outside lines 2-1 to 2-n at the other end. 1 to 15-n are commonly connected.
[0031]
Switch circuits 16-1 to 16-n each having two relay contacts are inserted and connected to each of the branch lines 15-1 to 15-n connected to the telephone outside lines 2-1 to 2-n. The telephone connection detectors 17-1 to 17-n are inserted and connected to the telephone outside line.
[0032]
The telephone connection detection units 17-1 to 17-n are, for example, the telephone connection detection unit 17-1 as an example, of the two telephone jacks 5 provided on the telephone outside line 2-1 drawn to the terminal side. For example, when the telephone 6 is inserted and connected to the telephone jack 5 connected to the terminal, for example, a voltage change of the telephone outside line 2-1 in the inserted connection of the telephone 6 is detected, and the telephone 6 is inserted and connected. Is detected.
[0033]
When the telephone connection detecting section 17-1 detects the insertion connection of the telephone 6, the relay contacts of the two circuits of the corresponding switch circuit section 16-1 are turned on, and the telephone external line 2-1 to which the telephone 6 is inserted and connected is branched. It is connected to the telephone circuit section 14 via the line 15-1.
[0034]
In the telephone circuit section 14, the switch circuit section 16-1 is turned on based on the insertion connection of the telephone 6 by the telephone connection detection section 17-1, and the connection state of the telephone 6 is changed via the branch line 15-1. When it is obtained, a voltage change between signal lines due to the connection of the telephone 6 is also detected, and a display for telephone call and a buzzer are displayed on the display unit 10 by outputting a telephone connection detection signal to the MPU 7 for the receiver in FIG. Make a ring.
[0035]
In response to the call by the telephone connection detection signal from the telephone circuit section 14, the manager connects the telephone set 13 for the receiver installed in the receiver 1 to the telephone jack 12, and the telephone 6 on the terminal side receives the call. A communication circuit is formed between the mobile phone 13 and the telephone 13 so that a communication can be performed between the two.
[0036]
At this time, on the other telephone outside lines 2-2 to 2-n where the telephone 6 is not connected to the telephone jack 5, the respective telephone connection detecting units 17-2 to 17-n are connected to the telephone 6 Are not detected, all the relay contacts of the two circuits in the switch circuit units 16-2 to 16-n are turned off.
[0037]
Therefore, when the telephone 6 is inserted and connected, extraneous noise applied to the receiver telephone 13 via the telephone circuit 14 is limited to the external noise of only the telephone circuit 2-1 to which the telephone 6 is inserted and connected. Since the other telephone external lines 2-2 to 2-n that are not connected to the telephone call are in a disconnected state, the external line noise is not received, and n telephone external lines are drawn from the receiver 1. In addition, external noise during a call can be made extremely small, and a call can be made clearly.
[0038]
FIG. 3 is an embodiment of a specific circuit configuration of the telephone circuit section 14, the switch circuit section 16-1, and the telephone connection detection section 17-1 in FIG.
[0039]
In FIG. 3, the telephone connection detecting unit 17-1 provided corresponding to the telephone outside line 2-1 supplies, for example, +24 volts as the power supply voltage Vc to the telephone outside line 2-1 via the resistor R1.
[0040]
The other line of the telephone outside line 2-1 is grounded via the resistor R4 and connected to the relay contact 19b of the switch circuit 16-1. The line voltage supplied to the telephone outside line 2-1 via the resistor R1 is divided by the resistors R2 and R3 and input to the comparing unit 18.
[0041]
A predetermined threshold value is set in the comparing unit 18. When the line voltage of the telephone outside line 2-1 decreases due to the insertion connection of the telephone 6 to the telephone jack 5, this is detected by the comparing unit 18 and the relay 19 is turned on. It drives to close the relay contacts 19a and 19b of the switch circuit section 16-1.
[0042]
The line for the relay contacts 19a and 19b of the switch circuit section 16-1 is taken out as a branch line 15-1 from between the resistors R1 and R4 in the telephone connection detection section 17-1. Is commonly connected to a branch line from another telephone outside line.
[0043]
The telephone circuit section 14 supplies the power supply voltage Vc to the telephone external line from the telephone jack 12 to which the telephone set 13 for the receiver is connected via a resistor R5. The telephone external line is connected to a coupling capacitor. It is connected to a branch line 15-1 from the switch circuit section 16-1 via C1. The relay contact 19b is connected to the telephone jack 12 via a capacitor C2 and is grounded via a resistor R6.
[0044]
A telephone call detecting section 20 is provided on the side of the switch circuit section 16-1 of the telephone circuit section 14, and like the telephone connection detecting section 17-1, the relay contacts 19a and 19b of the switch circuit section 16-1 are connected. The line voltage of the telephone outside line 2-1 obtained when the switch is turned on is compared with a preset threshold value to detect a call connection of the telephone 6, and a call connection detection signal is output to the receiver MPU 7 of FIG. Then, a call is made by the buzzer and the lighting of the indicator lamp by the display unit 10.
[0045]
The resistors R1, R4, R5, and R6 have the same resistance value, and the capacitors C1 and C2 have the same value. However, the circuit balance is good and noise can be suppressed. Further, the resistance values of the resistors R2 and R3 are set to be sufficiently large for the resistors R1, R4, R5 and R6.
[0046]
Next, the operation in FIG. 3 will be described. When the telephone 6 is inserted and connected to the telephone jack 5, the voltage of the telephone outside line 2-1 changes, and the comparison unit 18 of the telephone connection detecting unit 17-1 detects the change of the line voltage via the resistors R2 and R3. .
[0047]
When the comparator 18 detects a change in line voltage, the relay 19 is operated, and the relay contacts 19a and 19b of the switch circuit section 16-1 are turned on. When the relay contacts 19a and 19b are turned on, the line voltage of the telephone outside line 2-1 is input to the telephone call detection unit 20 of the telephone circuit unit 14.
[0048]
The call call detector 20 detects the call from the telephone 6 by comparing the line voltage with a preset threshold, outputs a call connection detection signal to the MPU 7 for the receiver, and displays a buzzer and a display on the display 10. A call is made when the part is lit.
[0049]
The manager near the receiver connects the telephone set 13 for the receiver installed in the receiver 1 to the telephone jack 12 by the sound of the buzzer, and the telephone set 6 on the terminal side and the telephone set 13 for the receiver are connected. A call circuit is formed between the two, and a call can be made between the two.
[0050]
At this time, the switch circuits 16-2 to 16-n are off on the other telephone lines 2-2 to 2-n where the telephone 6 is not connected to the telephone jack 5. Since other telephone external lines that are not connected to the telephone are in a disconnected state, the telephone can be clearly communicated without receiving the external noise.
[0051]
FIG. 4 shows another embodiment of the telephone device according to the present invention. As in the embodiment shown in FIG. 2, only the telephone device provided in the receiver 1 is shown. In the embodiment of FIG. 4, it is understood that the telephone external lines 2-1, 2-2, 2-3, 2-4,... Features.
[0052]
That is, the two lines of the telephone lines 2-1 and 2-2 drawn from the receiver 1 are combined into one and connected to the telephone connection detecting unit 17-1, and the lines of the telephone lines 2-3 and 2-4 are connected. The line is commonly connected to the telephone connection detection unit 17-2.
[0053]
In this way, by performing the system for detecting the insertion connection of the telephone 6 by integrating a plurality of telephone external lines into one, the switch circuit units 16-1, 16-2,... Provided on the receiver 1 side and the telephone connection detection If the number of the units 17-1, 17-2,... Is, for example, the number of telephone external lines is n, n circuits are required in the case of FIG. 2, but in FIG. Can be reduced. Of course, as the number of telephone external lines to be combined into one system, the number of telephone external lines to be combined into one system is determined so as to satisfy the condition that the combined external noise is equal to or less than a specified level that does not impair the communication quality.
[0054]
In the above embodiment, an R-type fire alarm system that collects information by calling from a receiver is taken as an example. However, the present invention is not limited to this. If it is a fire alarm system that provides a telephone outside line for each monitoring system, it can be applied to any appropriate fire alarm system.
[0055]
In addition, the present invention is not limited to the above embodiments, includes appropriate modifications without impairing the objects and advantages thereof, and is not limited by the numerical values shown in the embodiments.
[0056]
【The invention's effect】
As described above, according to the present invention, of the telephone external lines drawn from the receiver, only the telephone external line in which the telephone is inserted and connected to the telephone jack on the terminal side is connected to the telephone connection detection circuit and the switch. Through the circuit section, it is connected to the telephone circuit section in the receiver to form a communication circuit with the telephone for the receiver, and other telephone external lines where the telephone is not inserted and connected. Is in a disconnected state, external noise does not come in from a telephone outside line where the telephone is not inserted and connected, and the present invention is compared with a conventional case where n lines of telephone outside lines are commonly connected. According to this, the external noise can be reduced to 1 / n, the external noise can be sufficiently reduced, and the call between the site and the receiver can be clearly performed without being affected by the external noise.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a fire alarm system to which the telephone device of the present invention is applied. FIG. 2 is an explanatory diagram of a basic embodiment of the present invention. FIG. FIG. 4 is a circuit diagram of a telephone device provided in the receiver of the present invention. FIG. 5 is an explanatory diagram showing a portion of a conventional telephone device in a fire alarm system taken out and shown. Description】
1: Receiver 2: Telephone outside line 3: Detector repeater 4: Fire detector 5, 12: Telephone jack 6, 13: Telephone 7: MPU for receiver
8: Transmission circuit unit 9: Operation unit 10: Display unit 11: Call control unit 13: Telephone for receiver 14: Telephone circuit units 15-1 to 15-n: Branch lines 16-1 to 16-n: Switch Circuit units 17-1 to 17-n: telephone connection detecting unit 18: comparing unit 20: telephone call detecting unit

Claims (2)

受信機から引き出された複数系統の電話外線毎に1又は複数の電話ジャックを接続し、前記電話ジャックに電話器を挿入接続したことを受信機側で検出して受信機側電話器と通話を行う火災報知設備の電話装置に於いて、
前記受信機に、
前記受信機側電話器を一端に接続すると共に前記複数系統の電話外線に至る分岐線を他端に共通接続し、前記電話外線の電話ジャックに対する電話器の挿入接続を検出して通話呼出を行わせる電話器回路部と、
前記電話器回路部からの分岐線の各々に設けられた複数のスイッチ回路部と、前記複数のスイッチ回路部から前記電話外線に至る分岐線の各々に設けられ、前記電話外線に接続している電話ジャックに対する電話器の挿入接続を検出した際に、該当するスイッチ回路部をオンして前記電話回路部に接続する複数の電話接続検出部と、
を備えたことを特徴とする火災報知設備の電話装置。
One or a plurality of telephone jacks are connected to each of a plurality of telephone external lines drawn from the receiver, and the receiver detects that the telephone has been inserted and connected to the telephone jack, and communicates with the receiver-side telephone. In the telephone device of the fire alarm equipment to be performed,
To the receiver,
The receiver-side telephone is connected to one end, and a branch line leading to the plurality of telephone external lines is commonly connected to the other end, and a telephone call is made by detecting the insertion connection of the telephone to the telephone jack of the telephone external line. Telephone circuit
A plurality of switch circuit units provided on each of the branch lines from the telephone circuit unit; and a plurality of branch circuits extending from the plurality of switch circuit units to the telephone line, and connected to the telephone line. When detecting the insertion connection of the telephone to the telephone jack, a plurality of telephone connection detection units to turn on the corresponding switch circuit unit and connect to the telephone circuit unit,
A telephone device for a fire alarm system comprising:
請求項1記載の火災報知設備の電話装置に於いて、前記スイッチ回路部と電話接続検出部を、複数の電話回線を1つに取りまとめた分岐線に設けたことを特徴とする火災報知設備の電話装置。2. A telephone device for a fire alarm system according to claim 1, wherein said switch circuit unit and said telephone connection detection unit are provided on a branch line that integrates a plurality of telephone lines into one. Telephone equipment.
JP2002261162A 2002-09-06 2002-09-06 Fire alarm equipment telephone equipment Expired - Fee Related JP3803077B2 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016115031A (en) * 2014-12-12 2016-06-23 ホーチキ株式会社 Test device and test system
JP2016126606A (en) * 2015-01-06 2016-07-11 ホーチキ株式会社 Test system
CN116567131A (en) * 2023-06-12 2023-08-08 恒业世纪安全技术有限公司 Fire telephone communication system

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JPH04348498A (en) * 1991-02-28 1992-12-03 Hochiki Corp Fire alarming system
JPH0564993U (en) * 1991-08-08 1993-08-27 ホーチキ株式会社 Fire transmitter
JPH08305974A (en) * 1995-04-28 1996-11-22 Hochiki Corp Emergency telephone circuit of disaster preventive monitor device
JPH1074294A (en) * 1996-08-29 1998-03-17 Matsushita Electric Works Ltd Integrated system for monitoring alarm of multiple dwelling house

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04348498A (en) * 1991-02-28 1992-12-03 Hochiki Corp Fire alarming system
JPH0564993U (en) * 1991-08-08 1993-08-27 ホーチキ株式会社 Fire transmitter
JPH08305974A (en) * 1995-04-28 1996-11-22 Hochiki Corp Emergency telephone circuit of disaster preventive monitor device
JPH1074294A (en) * 1996-08-29 1998-03-17 Matsushita Electric Works Ltd Integrated system for monitoring alarm of multiple dwelling house

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016115031A (en) * 2014-12-12 2016-06-23 ホーチキ株式会社 Test device and test system
JP2016126606A (en) * 2015-01-06 2016-07-11 ホーチキ株式会社 Test system
CN116567131A (en) * 2023-06-12 2023-08-08 恒业世纪安全技术有限公司 Fire telephone communication system

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