JP2005008300A

JP2005008300A - Safety device for elevator doorway

Info

Publication number: JP2005008300A
Application number: JP2003171540A
Authority: JP
Inventors: Hiroshi Narasada; 浩奈良貞
Original assignee: Mitsubishi Electric Building Techno Service Co Ltd
Current assignee: Mitsubishi Electric Building Solutions Corp
Priority date: 2003-06-17
Filing date: 2003-06-17
Publication date: 2005-01-13

Abstract

<P>PROBLEM TO BE SOLVED: To provide a safety device for an elevator doorway preventing users from being drawn into gaps between doors and doorway pillars or landing jambs or being sandwiched between the doors. <P>SOLUTION: This safetly device is provided with landing doors for opening/closing a landing doorway, car doors for opening/closing a cage doorway, sensors for a car side provided for the car doors, sensors for a landing side provided for the each car door and optical systems provided for the each landing door opposing to the each sensor for the landing side. The sensors for the car side pass an optical axis along a face in the cage side of the car doors, and detect interception of the optical axis. The sensors for the landing side emit light toward the landing side, and introduce light returned from the landing side to the car side. The optical systems pass light from the landing side through the optical axis along a face in the landing side of the landing doors, and return the light to the car side. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
この発明はエレベータ出入口近傍で利用者が、戸と出入口柱又は乗場三方枠との隙間に引き込まれたり、戸相互に挟まれるのを防止するエレベータ出入口の安全装置に関するものである。
【０００２】
【従来の技術】
従来のエレベータ出入口の安全装置においては、引き込まれたり、挟まれたりし易い部位毎にセンサを設置する必要があった。すなわち、かご室側での引き込まれ防止用センサ、乗場側での引き込まれ防止用センサ、かご室側での挟まれ防止用センサ、乗場側での挟まれ防止用センサを個々に設置する必要があり、特に乗場用センサは各階床毎に設置が必要であった（例えば特許文献１〜４参照）。
【０００３】
【特許文献１】
特開平１０−１３９３３３号公報
【特許文献２】
特開平１０−２６５１５７号公報
【特許文献３】
特開平８−２６６３９号公報
【特許文献４】
特開２００２−２６５１７５号公報
【０００４】
【発明が解決しようとする課題】
上記従来のエレベータ出入口の安全装置にあっては、引き込まれたり、挟まれたりし易い部位毎にセンサを設置する必要があった。すなわち、かご室側での引き込まれ防止にはかご室又はかごの戸にセンサを、乗場側での引き込まれ防止には乗場三方枠又は乗場の戸にセンサを、かご室側での挟まれ防止にはかご室又はかごの戸にセンサを、乗場側での挟まれ防止には乗場三方枠又は乗場の戸にセンサを個々に設置する必要があり、特に乗場用センサは各階床毎に設置が必要であるため、高価となる問題があった。
【０００５】
この発明は、上述のような課題を解決するためになされたもので、第１の目的は、エレベータ出入口近傍で利用者が、戸と出入口柱又は乗場三方枠との隙間に引き込まれたり、戸相互に挟まれるのを防止するエレベータ出入口の安全装置を安価に提供するものである。
また、かご室側に設置したセンサで乗場側をもセンシングすることにより、乗場各階床毎にセンサを設置する必要のない安価なエレベータ出入口の安全装置を提供するものである。
【０００６】
【課題を解決するための手段】
この発明に係るエレベータ出入口の安全装置は、乗場出入口を開閉する乗場の戸と、かご室出入口を開閉するかごの戸と、かごの戸に設けられ、かごの戸のかご室側の面に沿って光軸を通過させるとともにこの光軸の遮断を検出するかご側用センサと、かごの戸にそれぞれ設けられ、乗場側に向かって光を放射するとともに乗場側からかご側に戻る光を入射する乗場側用センサと、乗場の戸に各乗場側用センサと対向してそれぞれ設けられ、乗場側からの光を乗場の戸の乗場側の面に沿って光軸を通過させるとともにかご側に戻すための光学系とを備えたものである。
【０００７】
また、乗場出入口を開閉する乗場の戸と、かご室出入口を開閉するかごの戸と、一方のかごの戸に設けられ、かごの戸のかご室側の面及び乗場の戸の乗場側の面に沿ってそれぞれ光軸を通過させるとともにこの光軸の遮断を検出するかご及び乗場側用センサと、他方のかごの戸に設けられ、かごの戸のかご室側の面に沿って通過した光を乗場側に向ける第１の光学系と、乗場の戸に第１の光学系とかご及び乗場側用センサとに対向してそれぞれ設けられ、乗場側からの光を乗場の戸の乗場側の面に沿って光軸を通過させるとともにかご及び乗場側用センサに戻すための第２及び第３の光学系とを備えたことものである。
【０００８】
【発明の実施の形態】
実施の形態１．
図１はこの発明の実施の形態１におけるエレベータ出入口の安全装置の乗場とかご室を示す平面断面図、図２はこの発明の実施の形態１におけるエレベータ出入口の安全装置の引き込まれ防止動作を示すフローチャート、図３はこの発明の実施の形態１におけるエレベータ出入口の安全装置の挟まれ防止動作を示すフローチャートである。図において、エレベータ装置は、乗場三方枠１と、乗場出入口２と、この乗場出入口２を開閉する引き戸で構成された乗場の戸３、４と、昇降路内に設けられたかご室５と、このかご室５の出入口６と、このかご室出入口６を開閉する引き戸で構成されたかごの戸７、８と、かご室出入口６の両側に配置されたかご室支持柱９とから構成されている。そして、一方のかごの戸７の移動方向外端部には、かご側用センサの一方である投光器１０が設置され、他方のかごの戸８の移動方向外端部には、かご側用センサの他方である受光器１１が設置されており、投光器１０からの光軸１２はかごの戸７、８のかご室側の面に沿って通過して受光器１１で受光される。一方のかごの戸７の移動方向外端部には、乗場側用センサの一方である投光器１３が別に設置され、他方のかごの戸８の移動方向外端部には、乗場側用センサの他方である受光器１４が別に設置されている。また、一方の乗場の戸３の移動方向外端部には、第１の光学系としての第１の屈折体１５が設置され、他方の乗場の戸４の移動方向外端部には、第２の光学系としての第２の屈折体１６が設置されている。乗場側用投光器１３から乗場側に向かって放射された光軸１７ａは第１の屈折体１５で直角に屈折され乗場の戸３、４の乗場側の面に沿って通過する光軸１７ｂとなり、さらに第２の屈折体１６で直角に屈折されかご側に向かって乗場側用受光器１４に到達する光軸１７ｃとなる。ここで、第１及び第２の光学系である屈折体１５、１６は、乗場側用投光器１３から乗場側用受光器１４に到達する光軸１７ａ〜１７ｃを所定の角度で屈折又は反射できるものであればプリズムや反射鏡等が利用できる。
かごの戸７に設置された乗場側用投光器１３と、乗場の戸３に設置された第１の屈折体１５は戸の開閉動作に伴い移動するが、乗場の戸３はかごの戸７と連動して開閉するように構成されているので、乗場側用投光器１３と第１の屈折体１５は相互の位置関係を保ったまま移動する。同様にかごの戸８に設置された乗場側用受光器１４と、乗場の戸４に設置された第２の屈折体１６も戸の開閉動作に伴い移動するが、乗場の戸４はかごの戸８と連動して開閉するように構成されているので、乗場側用受光器１４と第２の屈折体１６は相互の位置関係を保ったまま移動する。
このように構成することにより、乗場側用センサとしての投光器１３と受光器１４をかご側に１組設置し、乗場側には光学系としての第１及び第２の屈折体のみを各階床毎に設置するだけで全ての階床の乗場センサとして動作させることができ、エレベータ出入口の安全装置を安価に構成することができる。
【０００９】
次にエレベータ出入口の安全装置の引き込まれ防止機能について説明する。この発明における安全装置は、投光器、受光器からなるセンサの出力信号を、戸開動作時と戸閉動作時とで使い分けることにより、引き込まれ防止センサと挟まれ防止用センサとして兼用して使用することができる。
エレベータが走行中、かごの戸７の外端部に設置したかご側用投光器１０からの光軸１２は、かごの戸７、８のかご室側の面に沿って通過しており、かごの戸８の外端部に設置したかご側用受光器１１で受光されている。この時、かご室内の乗客の身体の一部、例えば手がかごの戸７、８に触れていると、光軸１２は遮断され、かご側用受光器１１は受光を阻止される。これにより、図示しない制御装置が動作して警報装置から「まもなくドアが開きます。ドアから手を離してください」等のメッセージを流して乗客に注意を促す。この警報メッセージ後もかごの戸から手を離さない場合は、戸開動作を阻止し、かごの戸７、８とかご室支持柱９の間、換言すれば引き戸と固定部の隙間に乗客の手が引き込まれることが防止される。
【００１０】
図２は引き込まれ防止動作を示すフローチャートである。ステップＳ１でエレベータが停止を検出するまでは安全装置は動作しない。戸全閉中の全期間で動作させることも可能であるが、戸開する直前に警報した方が効果的であるので、停止検出以降の安全装置の動作を有効としている。ステップＳ１でエレベータが停止を検出しても直ぐには戸開しないのでステップＳ２では判定が「Ｎ」となり、ステップＳ３に進む。ステップＳ３でかご側用受光器１１が受光阻止を検出（以下センサ動作という）していないとステップＳ２へ戻る。乗客の手がかごの戸に触れていないとセンサ動作をしないのでステップＳ２で通常の戸開タイミングとなり、ステップＳ５に進んでも判定が「Ｎ」となって、ステップＳ９で通常どおり戸開動作を開始する。
乗客の手がかごの戸に触れている時は、ステップＳ１、Ｓ２、Ｓ３と進み、センサ動作しているので、ステップＳ３の判定が「Ｙ」となり、ステップＳ４で警報装置から例えば、「まもなくドアが開きます。ドアから手を離してください」等のメッセージを流し乗客に注意を促す。この警報メッセージにより乗客がかごの戸から手を離すと、ステップＳ２で通常の戸開タイミングとなり、ステップＳ５に進んでも判定が「Ｎ」となって、ステップＳ９で通常どおりの戸開動作を開始する。
通常の戸開タイミングとなっても乗客がかごの戸から手を離さず、センサ動作が継続しているとステップＳ５で判定が「Ｙ」となり、ステップＳ６、Ｓ７へと進み戸開を阻止する。さらにステップＳ８で警報装置の警報メッセージと警報音例えば「ピッピッピッ」を流し、再警報する。この動作はステップＳ６で通常の戸開タイミングから５秒経過するまで継続する。通常の戸開タイミングから５秒経過する前に乗客がかごの戸から手を離すとセンサ動作しなくなるので、ステップＳ５で判定が「Ｎ」となり、ステップＳ９へ進み戸開動作を開始する。
通常の戸開タイミングから５秒経過した時は、ステップＳ６で判定が「Ｙ」となり、ステップＳ９へ進み戸開動作を開始する。これにより、センサの故障等でセンサ検出信号が継続した場合でも、戸開阻止継続するのを止め、「閉じ込め」状態となるのを防止している。
以上はかご内での引き込まれ防止動作を例に説明したが、乗場側でも動作は同じである。すなわち、センサは、かごの戸７の外端部に設置した乗場側用投光器１３、かごの戸８の外端部に設置した乗場側用受光器１４、乗場の戸３の外端部に設置した第１の屈折体１５、乗場の戸４の外端部に設置した第２の屈折体１６で構成され、乗場側用投光器１３から乗場側に向かって放射された光軸１７ａは第１の屈折体１５で直角に屈折され乗場の戸３、４の乗場側の面に沿って通過する光軸１７ｂとなり、さらに第２の屈折体１６で直角に屈折されかご側に向かって乗場側用受光器１４に到達する光軸１７ｃとなる。ここで、乗場での待ち客が乗場の戸に触れると光軸１７ｂが遮断され、乗場側用受光器１４は受光を阻止される。この状態をセンサ動作とする。乗場は上下方向に複数あるが、乗場側用投光器１３、乗場側用受光器１４ともにかご側に設置しているので、かごが到着した階床のみ乗場側光軸１７ｂが有効となる。すなわち、かごが到着していない（乗場の戸が開かない）他の階床の乗場の戸に手を触れても不要に動作することはない。
【００１１】
次に挟まれ防止機能について説明する。この発明における安全装置では、引き込まれ防止用センサとして設置した投光器、受光器からなるセンサを挟まれ防止用センサとしても使用する。
図１において、かご側用投光器１０、かご側用受光器１１、乗場側用投光器１３、乗場側用受光器１４について、各投光器から各受光器へそれぞれ到達する光軸１２、１７ａ〜１７ｃは、戸全閉時、戸開動作中、戸全開時、戸閉動作中のいずれの時も、かごの戸７、８のかご室側の面又は乗場の戸３、４の乗場側の面に沿って通過している。戸全開時及び戸閉動作中に光軸１２、１７ｂが乗降客の手や身体で遮断されると、戸が閉まるのを阻止したり、閉まりかけた戸を反転戸開させ、乗降客の手や身体が戸に衝突したり、挟まれたりすることを防止する。
図３は挟まれ防止動作を示すフローチャートである。通常のエレベータでは、戸全開後不干渉時間が終了するまでは戸閉を開始しないので、ステップＳ１１、Ｓ１２と進み、不干渉時間終了後から挟まれ防止動作が機能する。
センサ動作しない時は、ステップＳ１３、Ｓ１４、Ｓ１６と進み、戸閉動作を開始する。戸閉動作開始後もセンサ動作しない時は、ステップＳ１７、Ｓ１８、Ｓ１９と進み、戸全閉して終了する。
乗降客の出入りで戸全開中にセンサ動作した時は、ステップＳ１４からステップＳ１５へ進み、戸開保持しステップＳ１３に戻る。乗降が終了しセンサ動作しなくなると、ステップＳ１４からステップＳ１６へ進み、戸閉動作を開始する。戸閉動作開始後もセンサ動作しない時は、ステップＳ１７、Ｓ１８、Ｓ１９と進み、戸全閉して終了する。
戸閉動作開始後、乗降客の出入りでセンサ動作した時は、ステップＳ１７からステップＳ２０へ進み、反転戸開しステップＳ１３へ戻る。ここでセンサ動作が継続していると、ステップＳ１４、Ｓ１５へ進み、戸開保持する。乗降が終了しセンサ動作しなくなると、ステップＳ１４からステップＳ１６へ進み、戸閉動作を再開する。その後、センサ動作しなければ戸全閉し、センサ動作すると反転戸開するのは上述のとおりである。
乗降客の出入りでセンサ動作し戸開保持又は戸開反転を繰り返し、時間が経過すると、ステップＳ１３で最初のセンサ動作から２０秒経過した時点でステップＳ２１へ進み、警報音「ピッピッピッ」を鳴らし警報しながらステップＳ２２で戸閉動作を開始し、ステップＳ２３で戸全閉すると、ステップＳ２４で動作終了する。この動作は、センサ動作が継続して戸開保持したままだと他階の呼びに対するエレベータの運行動作を阻害するので一定時限後に戸閉動作を開始するもので、強制戸閉動作として公知のものである。また、万一のセンサ故障時にもエレベータの運行動作を阻害しないように備えている。
なお、上記で説明した動作は、かご側の光軸１２又は乗場側の光軸１７ｂを遮断した時に同じ動作をする。但し、乗場側の光軸１７ｂは、乗場側用投光器１３、乗場側用受光器１４ともにかご側に設置しているので、かごが到着して戸開している階床のみ乗場側の光軸１７ｂが有効となる。すなわち、かごが到着していない（乗場の戸が閉じている）他の階床の乗場の戸に手を触れても不要に動作することはない。
【００１２】
この実施の形態１によれば、かご側の光軸１２又は乗場側の光軸１７ｂがかごの戸７、８と、乗場の戸３、４を包囲する形で存在するので、かご側からも乗場側からも乗降客の手や身体がかごの戸７、８又は乗場の戸３、４の開閉動作線上に到達する前に検出することができ、戸に衝突したり、挟まれたりすることが防止でき、従来のものと比較して飛躍的に安全性が向上する。
【００１３】
実施の形態２．
図４はこの発明の実施の形態２におけるエレベータ出入口の安全装置の乗場とかご室を示す平面断面図である。この実施の形態２では、一方のかごの戸７の移動方向外端部に、かご及び乗場側用センサの一方である投光器１８と、かご及び乗場側用センサの他方である受光器１９とを設置している。また、他方のかごの戸８の移動方向外端部に第１の光学系としての第１の屈折体２０を、かごの戸８と対向する乗場の戸４の移動方向外端部に第２の光学系としての第２の屈折体２１を、かごの戸７と対向する乗場の戸３の移動方向外端部に第３の光学系としての第３の屈折体２２をそれぞれ設置している。これにより、かご及び乗場側用投光器１８から出た光軸２３ａはかごの戸７、８のかご室側の面に沿って通過して第１の屈折体２０で乗場側に向かって直角に屈折された光軸２３ｂとなり、第２の屈折体２１で直角に屈折され乗場の戸３、４の乗場側の面に沿って通過する光軸２３ｃとなり、さらに第３の屈折体２２で直角に屈折されかご側に向かってかご及び乗場側用受光器１９に到達する光軸２３ｄとなる。ここで、第１、第２及び第３の光学系である第１、第２及び第３の屈折体２０、２１、２２は、かご及び乗場側用投光器１８からかご及び乗場側用受光器１９に到達する光軸２３ａ〜２３ｄを所定の角度で屈折又は反射できるものであればプリズムや反射鏡等が利用できる。
【００１４】
この実施の形態２によれば、かご及び乗場側投光器とかご及び乗場側受光器の１組をかごの戸に設置しているので、部品点数を削減することができ、安価にエレベータ出入口の安全装置を構成することができる。
【００１５】
【発明の効果】
この発明は以上説明したように、かごの戸に設けられ、かごの戸のかご室側の面に沿って光軸を通過させるとともにこの光軸の遮断を検出するかご側用センサと、かごの戸にそれぞれ設けられ、乗場側に向かって光を放射するとともに乗場側からかご側に戻る光を入射する乗場側用センサと、乗場の戸に各乗場側用センサと対向してそれぞれ設けられ、乗場側からの光を乗場の戸の乗場側の面に沿って光軸を通過させるとともにかご側に戻すための光学系とを備えたので、かご側からも乗場側からも乗降客の手や身体がかごの戸又は乗場の戸の開閉動作線上に到達する前に検出することができ、戸に衝突したり、挟まれたりすることが防止でき、従来のものと比較して飛躍的に安全性が向上する。
また、一方のかごの戸に設けられ、かごの戸のかご室側の面及び乗場の戸の乗場側の面に沿ってそれぞれ光軸を通過させるとともにこの光軸の遮断を検出するかご及び乗場側用センサと、他方のかごの戸に設けられ、かごの戸のかご室側の面に沿って通過した光を乗場側に向ける第１の光学系と、乗場の戸に第１の光学系とかご及び乗場側用センサとに対向してそれぞれ設けられ、乗場側からの光を乗場の戸の乗場側の面に沿って光軸を通過させるとともにかご及び乗場側用センサに戻すための第２及び第３の光学系とを備えたので、かご及び乗場側投光器とかご及び乗場側受光器の１組をかごの戸に設置すればよく、部品点数を削減することができ、安価にエレベータ出入口の安全装置を構成することができる。
【図面の簡単な説明】
【図１】この発明の実施の形態１におけるエレベータ出入口の安全装置の乗場とかご室を示す平面断面図である。
【図２】この発明の実施の形態１におけるエレベータ出入口の安全装置の引き込まれ防止動作を示すフローチャートである。
【図３】この発明の実施の形態１におけるエレベータ出入口の安全装置の挟まれ防止動作を示すフローチャートである。
【図４】この発明の実施の形態２におけるエレベータ出入口の安全装置の乗場とかご室を示す平面断面図である。
【符号の説明】
１乗場三方枠
２乗場出入口
３、４乗場の戸
５かご室
６かご室出入口
７、８かごの戸
９かご室支持柱
１０かご側用投光器（センサ）
１１かご側用受光器（センサ）
１２光軸
１３乗場側投光器（センサ）
１４乗場側受光器（センサ）
１５第１の光学系（屈折体）
１６第２の光学系（屈折体）
１７ａ〜１７ｃ光軸
１８かご及び乗場側用投光器（センサ）
１９かご及び乗場側用受光器（センサ）
２０〜２２第１〜第３の光学系（屈折体）
２３ａ〜２３ｄ光軸[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an elevator entrance / exit safety device which prevents a user from being drawn into a gap between a door and an entrance / exit post or a landing three-way frame in the vicinity of the elevator entrance / exit, or being caught between doors.
[0002]
[Prior art]
In a conventional elevator entrance / exit safety device, it is necessary to install a sensor for each part that is easily pulled in or pinched. In other words, it is necessary to individually install a sensor for preventing the car from being pulled in, a sensor for preventing the car from being pulled in at the landing, a sensor for preventing the car from being caught in the car, and a sensor for preventing the car from being caught in the hall. In particular, the hall sensors need to be installed for each floor (for example, see Patent Documents 1 to 4).
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 10-139333 [Patent Document 2]
Japanese Patent Laid-Open No. 10-265157 [Patent Document 3]
JP-A-8-26639 [Patent Document 4]
Japanese Patent Laid-Open No. 2002-265175
[Problems to be solved by the invention]
In the above conventional elevator entrance / exit safety device, it is necessary to install a sensor for each part that is easily pulled in or pinched. In other words, to prevent the car from being pulled in on the cab side, a sensor is placed in the car room or door of the car. It is necessary to install a sensor in the car room or door of the car, and to install the sensor individually in the three-way frame of the landing or the door of the landing to prevent pinching on the landing side. Since it is necessary, there was a problem of being expensive.
[0005]
The present invention has been made to solve the above-mentioned problems, and a first object is that a user is drawn into the gap between the door and the doorway pillar or the landing three-way frame in the vicinity of the elevator doorway. The present invention provides an elevator entrance / exit safety device that prevents pinching of each other at low cost.
Further, by sensing the landing side with a sensor installed on the cab side, an inexpensive elevator entrance / exit safety device that does not require a sensor for each floor is provided.
[0006]
[Means for Solving the Problems]
The elevator doorway safety device according to the present invention is provided in a hall door that opens and closes a hall doorway, a car door that opens and closes a car room doorway, and a car door, along the surface of the car door side The car side sensor that passes through the optical axis and detects this optical axis blockage and the car door respectively emit light toward the landing side and incident light returning from the landing side to the car side A landing-side sensor and a landing door are provided opposite to each landing-side sensor, and light from the landing side passes through the optical axis along the landing-side surface of the landing door and returns to the car side. And an optical system.
[0007]
In addition, the door of the hall that opens and closes the landing doorway, the door of the car that opens and closes the door of the car room, and the surface of the car door side of the car door and the surface of the landing door side of the hall door Along the surface of the car and the sensor on the other side of the car and the other side of the car, and the light that has passed along the surface of the car room side of the car door. The first optical system for directing the vehicle toward the landing side, and the first door, the car and the sensor for the landing side are provided on the landing door, respectively, and light from the landing side is provided on the landing side of the landing door. The second and third optical systems for passing the optical axis along the surface and returning to the car and the landing side sensor are provided.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
FIG. 1 is a plan sectional view showing a hall and a car room of a safety device for an elevator doorway according to Embodiment 1 of the present invention, and FIG. 2 shows an operation of preventing the safety device for the elevator doorway from being pulled in according to Embodiment 1 of the present invention. FIG. 3 is a flowchart showing an operation of preventing the safety device at the elevator doorway from being caught in the first embodiment of the present invention. In the figure, the elevator apparatus includes a landing three-way frame 1, a landing doorway 2, landing doors 3, 4 composed of sliding doors that open and close the landing doorway 2, and a cab 5 provided in the hoistway, It is composed of an entrance / exit 6 of the car room 5, car doors 7 and 8 constituted by sliding doors for opening / closing the car room entrance / exit 6, and car room support columns 9 arranged on both sides of the car room entrance / exit 6. Yes. Then, a projector 10 which is one of the car side sensors is installed at the outer end of the car door 7 in the moving direction, and the car side sensor is installed at the outer end of the other car door 8 in the moving direction. The other side of the light receiver 11 is installed, and the optical axis 12 from the projector 10 passes along the surface of the car doors 7 and 8 on the side of the car room and is received by the light receiver 11. A projector 13 which is one of the landing side sensors is separately installed at the outer end portion in the moving direction of the door 7 of one car, and the landing side sensor of the landing side sensor is provided at the outer end portion in the moving direction of the other door 8 of the car. The other light receiver 14 is installed separately. In addition, a first refracting body 15 as a first optical system is installed at the outer end portion in the moving direction of the door 3 of one landing, and the outer end portion in the moving direction of the door 4 of the other landing is in the first end. A second refracting body 16 is installed as the second optical system. The optical axis 17a radiated from the landing side projector 13 toward the landing side is refracted at right angles by the first refracting body 15 and becomes an optical axis 17b passing along the landing side surface of the landing doors 3 and 4, Further, it becomes an optical axis 17c that is refracted by the second refracting body 16 at a right angle and reaches the landing-side light receiver 14 toward the car side. Here, the refractors 15 and 16 which are the first and second optical systems can refract or reflect the optical axes 17a to 17c reaching the landing-side light receiver 14 from the landing-side light projector 13 at a predetermined angle. If so, prisms and reflectors can be used.
The landing-side projector 13 installed in the car door 7 and the first refractor 15 installed in the landing door 3 move in accordance with the opening / closing operation of the door, but the landing door 3 is connected to the car door 7. Since it is configured to open and close in conjunction, the landing-side projector 13 and the first refractor 15 move while maintaining the mutual positional relationship. Similarly, the landing-side light receiver 14 installed at the car door 8 and the second refractor 16 installed at the landing door 4 also move in accordance with the opening / closing operation of the car door. Since it is configured to open and close in conjunction with the door 8, the landing-side light receiver 14 and the second refractor 16 move while maintaining the mutual positional relationship.
By configuring in this way, one set of the projector 13 and the light receiver 14 as the landing side sensor is installed on the car side, and only the first and second refractors as the optical system are provided on the landing side for each floor. It is possible to operate as a hall sensor for all floors simply by installing in the elevator, and the safety device for the elevator doorway can be constructed at low cost.
[0009]
Next, the function of preventing the safety device of the elevator doorway from being pulled in will be described. The safety device according to the present invention uses the output signal of the sensor composed of the light projector and the light receiver separately for the door opening operation and the door closing operation, so that it can be used as both a pull-in prevention sensor and a pinching prevention sensor. be able to.
While the elevator is running, the optical axis 12 from the car-side floodlight 10 installed at the outer end of the car door 7 passes along the car room side surface of the car doors 7, 8. Light is received by a car-side light receiver 11 installed at the outer end of the door 8. At this time, if a part of the passenger's body in the car room, for example, a hand touches the car doors 7 and 8, the optical axis 12 is blocked and the car-side light receiver 11 is prevented from receiving light. As a result, a control device (not shown) is activated to send a message such as “The door will open soon. Please release your hand” to alert the passenger. If you do not take your hand off the car door after this warning message, you will be prevented from opening the door and between the car doors 7 and 8 and the car room support column 9, in other words, between the sliding door and the fixed part. Hands are prevented from being drawn.
[0010]
FIG. 2 is a flowchart showing the pull-in prevention operation. The safety device does not operate until the elevator detects a stop in step S1. Although it is possible to operate during the entire period when the door is fully closed, it is more effective to warn immediately before the door is opened, so the operation of the safety device after the stop detection is made effective. Even if the elevator detects a stop in step S1, the door does not open immediately, so in step S2, the determination is “N” and the process proceeds to step S3. If the car-side light receiver 11 does not detect light reception blocking (hereinafter referred to as sensor operation) in step S3, the process returns to step S2. Since the sensor operation is not performed unless the passenger's hand touches the door of the car, the normal door opening timing is reached in step S2, the determination is “N” even if the process proceeds to step S5, and the door opening operation is normally performed in step S9. Start.
When the passenger's hand is touching the car door, the process proceeds to steps S1, S2, and S3, and the sensor is operating. Therefore, the determination in step S3 is “Y”. “Do not let go of the door, let the door open.” When the passenger removes his / her hand from the car door by this warning message, the normal door opening timing is reached in step S2, the determination becomes “N” even after proceeding to step S5, and the normal door opening operation is started in step S9. To do.
If the passenger does not release his / her hand from the car door even when the normal door opening timing is reached and the sensor operation continues, the determination is “Y” in step S5 and the process proceeds to steps S6 and S7 to prevent the door opening. . Further, in step S8, an alarm message of the alarm device and an alarm sound such as “beep” are played, and the alarm is re-alarmed. This operation is continued until 5 seconds have elapsed from the normal door opening timing in step S6. If the passenger removes his / her hand from the car door before 5 seconds have elapsed from the normal door opening timing, the sensor operation stops. In step S5, the determination is “N”, and the process proceeds to step S9 to start the door opening operation.
When 5 seconds have elapsed from the normal door opening timing, the determination is “Y” in step S6, and the process proceeds to step S9 to start the door opening operation. As a result, even when the sensor detection signal is continued due to a sensor failure or the like, the door opening prevention is stopped and the “confined” state is prevented.
The above description has been made by taking the operation of preventing the car from being pulled in as an example, but the operation is the same on the landing side. That is, the sensors are installed at the landing side projector 13 installed at the outer end of the car door 7, the landing side light receiver 14 installed at the outer end of the car door 8, and the outer end of the landing door 3. The first refracting body 15 and the second refracting body 16 installed at the outer end of the landing door 4, and the optical axis 17a emitted from the landing-side projector 13 toward the landing side is the first refracting body 15. The optical axis 17b is refracted at a right angle by the refracting body 15 and passes along the landing side surface of the landing doors 3 and 4, and further refracted at a right angle by the second refracting body 16 toward the car side. The optical axis 17c reaches the optical device 14. Here, when the waiting customer at the landing touches the landing door, the optical axis 17b is cut off, and the landing-side light receiver 14 is prevented from receiving light. This state is referred to as sensor operation. Although there are a plurality of landings in the vertical direction, since both the landing-side light projector 13 and the landing-side light receiver 14 are installed on the car side, the landing-side optical axis 17b is effective only on the floor where the car arrived. That is, even if the car has not arrived (the landing door does not open), touching the landing door on another floor does not cause unnecessary operation.
[0011]
Next, the pinch prevention function will be described. In the safety device according to the present invention, a sensor composed of a projector and a light receiver installed as a sensor for preventing pulling in is used as a sensor for preventing pinching.
In FIG. 1, for the car-side light projector 10, the car-side light receiver 11, the landing-side light projector 13, and the landing-side light receiver 14, the optical axes 12 and 17 a to 17 c that reach the respective light receivers from the respective light projectors are respectively When the door is fully closed, when the door is open, when the door is fully open, or when the door is closed, along the surface of the car door side of the car doors 7 and 8 or the surface of the landing doors 3 and 4 Is passing. When the optical axis 12, 17b is blocked by the passengers' hands or body when the door is fully opened or during the door closing operation, the door is prevented from closing or the door that is about to close is reversed, and the passenger's hand And prevent the body from colliding with the door or being pinched.
FIG. 3 is a flowchart showing the pinching prevention operation. In a normal elevator, the door closing operation is not started until the non-interference time after the door is fully opened, so that the process proceeds to steps S11 and S12, and the pinch prevention operation functions after the non-interference time ends.
When the sensor operation is not performed, the process proceeds to steps S13, S14, and S16, and the door closing operation is started. When the sensor operation is not performed even after the door closing operation is started, the process proceeds to steps S17, S18, and S19, and the door is fully closed and the process ends.
When the sensor operation is performed while the door is fully open due to passengers entering and exiting, the process proceeds from step S14 to step S15, the door is held open, and the process returns to step S13. When the boarding / exit is finished and the sensor operation stops, the process proceeds from step S14 to step S16, and the door closing operation is started. When the sensor operation is not performed even after the door closing operation is started, the process proceeds to steps S17, S18, and S19, and the door is fully closed and the process ends.
After the door closing operation starts, when the sensor operation is performed by entering / exiting the passenger, the process proceeds from step S17 to step S20, the reverse door is opened, and the process returns to step S13. If the sensor operation continues here, the process proceeds to steps S14 and S15, and the door is kept open. When the boarding / exiting ends and the sensor operation stops, the process proceeds from step S14 to step S16, and the door closing operation is restarted. Thereafter, if the sensor is not operated, the door is fully closed, and if the sensor is operated, the reverse door is opened as described above.
When the passenger moves in and out and repeats the sensor operation and keeps opening or reversing the door open, when time elapses, in step S13, when 20 seconds elapses from the first sensor operation, the process proceeds to step S21 and an alarm sound “beep” sounds. However, when the door closing operation is started in step S22 and the door is fully closed in step S23, the operation ends in step S24. This operation starts the door closing operation after a certain period of time because the sensor operation continues to keep the door open and disturbs the elevator operation for calls on other floors. It is. In addition, even in the event of a sensor failure, it is equipped so as not to hinder the operation of the elevator.
The operation described above is the same when the car-side optical axis 12 or the landing-side optical axis 17b is cut off. However, since the landing-side optical axis 17b is installed on the car side for both the landing-side light projector 13 and the landing-side light receiver 14, only the floor where the car arrives and the door is opened is the optical axis on the landing side. 17b becomes effective. That is, even if the car has not arrived (the landing door is closed) and touches the landing door of another floor, it does not operate unnecessarily.
[0012]
According to the first embodiment, the car-side optical axis 12 or the landing-side optical axis 17b exists so as to surround the car doors 7 and 8 and the landing doors 3 and 4, so that also from the car side. It can be detected from the landing side before the passenger's hand or body reaches the opening / closing operation line of the car doors 7 and 8 or the doors 3 and 4 of the car, and the door collides with or is pinched. Can be prevented, and the safety is dramatically improved compared to the conventional one.
[0013]
Embodiment 2. FIG.
FIG. 4 is a plan sectional view showing a hall and a car room of a safety device for an elevator doorway according to Embodiment 2 of the present invention. In the second embodiment, a light projector 18 that is one of the car and the landing-side sensor and a light receiver 19 that is the other of the car and the landing-side sensor are provided at the outer end portion in the moving direction of one car door 7. It is installed. Further, the first refracting body 20 as the first optical system is provided at the outer end portion in the moving direction of the other car door 8, and the second refracting direction outer end portion of the landing door 4 facing the car door 8 is second. The second refracting body 21 as an optical system is installed at the outer end in the moving direction of the landing door 3 facing the car door 7, and a third refracting body 22 as a third optical system is installed. . As a result, the optical axis 23a emitted from the car and the landing side projector 18 passes along the car room side surface of the car doors 7 and 8, and is refracted at right angles toward the landing side by the first refracting body 20. The optical axis 23b is refracted at right angles by the second refracting body 21 and becomes an optical axis 23c passing along the landing side surface of the landing doors 3 and 4, and further refracted by the third refracting body 22 at right angles. The optical axis 23d reaches the car and the landing-side light receiver 19 toward the car side. Here, the first, second, and third refractors 20, 21, and 22, which are the first, second, and third optical systems, are connected from the car and the landing side light projector 18 to the car and the landing side light receiver 19. A prism, a reflecting mirror, or the like can be used as long as it can refract or reflect the optical axes 23a to 23d that reach the beam at a predetermined angle.
[0014]
According to the second embodiment, since one set of the car and the landing side light projector and the car and the landing side light receiver are installed in the car door, the number of parts can be reduced, and the safety of the elevator entrance / exit can be reduced at low cost. A device can be configured.
[0015]
【The invention's effect】
As described above, the present invention provides a car-side sensor that is provided in a car door, passes the optical axis along the surface of the car door, and detects the interruption of the optical axis. Each of the doors is provided with a landing-side sensor that radiates light toward the landing side and incident light returning from the landing side to the car side, and a landing door that is provided to face each landing-side sensor. It is equipped with an optical system that allows light from the landing side to pass through the optical axis along the landing side surface of the landing door and to return to the car side. It can be detected before the body reaches the open / close operation line of the car door or the landing door, and can be prevented from colliding with or being pinched by the door. Improves.
In addition, the car and the hall that are provided in one car door and pass the optical axis along the car room side surface of the car door and the landing side surface of the landing door, respectively, and detect the interruption of this optical axis. A side sensor, a first optical system that is provided in the other car door and directs the light that has passed along the car room side surface of the car door to the landing side, and a first optical system on the landing door The first and second sensors are provided to face the car and the landing-side sensor, respectively, for allowing light from the landing side to pass through the optical axis along the landing-side surface of the landing door and to return to the car and the landing-side sensor. Since the second and third optical systems are provided, one set of the car and the landing side light projector and the car and the landing side light receiver need only be installed in the car door, the number of parts can be reduced, and the elevator can be inexpensively provided. An entrance / exit safety device can be constructed.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a plan sectional view showing a hall and a cab of an elevator door safety device according to Embodiment 1 of the present invention.
FIG. 2 is a flowchart showing an operation of preventing the safety device at the elevator doorway from being pulled in according to the first embodiment of the present invention.
FIG. 3 is a flowchart showing an operation for preventing the safety device at the elevator entrance / exit from being caught in the first embodiment of the present invention.
FIG. 4 is a plan sectional view showing a hall and a car room of an elevator door safety device according to Embodiment 2 of the present invention;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Boarding 3 side frame 2 Boarding doorway 3, 4 Boarding door 5 Car room 6 Car room doorway 7, 8 Car door 9 Car room support pillar 10 Car side projector (sensor)
11 Receiver for car side (sensor)
12 optical axis 13 landing side projector (sensor)
14 Photoreceiver on the landing side (sensor)
15 First optical system (refractive body)
16 Second optical system (refractive body)
17a to 17c Optical axis 18 Car and landing side projector (sensor)
19 Car and landing-side light receiver (sensor)
20-22 First to third optical systems (refractive bodies)
23a-23d optical axis

Claims

The door of the hall that opens and closes the landing doorway, the door of the car that opens and closes the door of the car room, and the door of the car. A car-side sensor that detects the blocking of the car, a landing-side sensor that is provided at each of the car doors and emits light toward the landing side and returns from the landing side to the car side; and An optical system is provided on the door so as to face each landing side sensor and allows light from the landing side to pass through the optical axis along the landing side surface of the landing door and to return to the car side. An elevator entrance / exit safety device.

2. The car-side sensor and the landing-side sensor are respectively provided at outer end portions in the moving direction of the car door, and the optical system is provided at each outer end portion in the moving direction of the landing door. Elevator doorway safety equipment.

The car-side sensor and the landing-side sensor are each composed of a projector and a light receiver, and the optical system is composed of a prism or a reflecting mirror that refracts or reflects light at a predetermined angle. The elevator entrance / exit safety device according to claim 2.

A hall door that opens and closes the hall entrance, a car door that opens and closes the car room entrance, and a car door side surface of the car door and a hall side surface of the hall door. Along the surface of the car and the sensor on the other side of the car and the other side of the car, and the light that has passed along the surface of the car room side of the car door. The first optical system is directed to the landing side, and the landing door is provided facing the first optical system device, the car and the landing side sensor, respectively, and light from the landing side is transmitted to the landing door. An elevator entrance / exit safety device comprising a second and a third optical system for passing an optical axis along a landing side surface and returning to the car and the landing side sensor.

The car and the landing side sensor are provided at the outer end of the one car door in the moving direction, and the first optical system is provided at the outer end of the other car door in the moving direction. 5. The elevator entrance / exit safety device according to claim 4, wherein the system is provided at each outer end of the landing door in the moving direction.

6. The car and the landing-side sensor are each composed of a projector and a light receiver, and the optical system is composed of a prism or reflecting mirror that refracts or reflects light at a predetermined angle. The elevator door safety device described.