JP5206295B2 - Elevator door safety device - Google Patents

Elevator door safety device Download PDF

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JP5206295B2
JP5206295B2 JP2008258219A JP2008258219A JP5206295B2 JP 5206295 B2 JP5206295 B2 JP 5206295B2 JP 2008258219 A JP2008258219 A JP 2008258219A JP 2008258219 A JP2008258219 A JP 2008258219A JP 5206295 B2 JP5206295 B2 JP 5206295B2
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door
foreign object
elevator
object detection
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JP2010089843A5 (en
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琢也 藤井
圭司朗 廣畑
寛 柏倉
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Fujitec Co Ltd
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本発明は、エレベータのドアに細長い紐やロープ、コード類等の異物が挟み込まれたままの状態でかごが走行することを防止するエレベータのドア安全装置に係り、特に異物を検知し続ける故障が発生した場合の故障検出に関するものである。   The present invention relates to an elevator door safety device that prevents a car from traveling while foreign objects such as long strings, ropes, cords, etc. are sandwiched in an elevator door, and in particular, a failure that continues to detect foreign objects. It relates to failure detection when it occurs.

一般に、エレベータのドアには、その開閉状態を検出するゲートスイッチや、ドアが戸閉端に達したことを検出する閉端検出スイッチが設けられており、このゲートスイッチ等が作動してドアが閉じたことを確認してから、エレベータは運転を開始するようになっている。また、従来からエレベータのドアに乗客が挟まれたり、或いは乗客のかごへの出入りを検出するドア安全装置として、セーフティシューや光電センサ、超音波センサ等を利用したものがよく知られている。   In general, an elevator door is provided with a gate switch for detecting the open / closed state of the elevator door and a closed end detection switch for detecting that the door has reached the door closed end. After confirming that it has been closed, the elevator starts operation. Conventionally, a door safety device that uses a safety shoe, a photoelectric sensor, an ultrasonic sensor, or the like is well known as a door safety device that detects a passenger being caught in an elevator door or detects the passenger entering or leaving the car.

しかしながら、これらのドア安全装置や前述のゲートスイッチ等では、細長い紐やロープ或いはコード類等の異物がドアに挟まれていることを確実に検出することは困難である。このため例えば紐で繋いだ犬を連れている乗客の、一方が乗場に他方がかご内に分かれた状態でドアが閉まると、紐がドアに挟み込まれたままの状態でエレベータが走行を開始し、重大な事故を招く虞がある。   However, it is difficult for these door safety devices, the above-described gate switches, and the like to reliably detect that a foreign object such as an elongated string, a rope, or a cord is caught in the door. For this reason, for example, if the passenger closes with a dog connected by a string and the door closes with one on the landing and the other in the car, the elevator will start running with the string still sandwiched in the door. There is a risk of serious accidents.

こうした事態を防止するため、細長い紐やロープ或いはコード類等の異物がドアに挟まれていることを検出するドア安全装置として、エレベータかご戸の戸当たり面に、圧力によって作動する異物検出装置を設けたもの(例えば特許文献1参照)や、エレベータ出入口の、戸の全閉時における戸当り部付近の上下部の一方に投光手段を、他方に受光手段を設けるようにしたもの(例えば特許文献2参照)など、種々のものが提案されている。   In order to prevent such a situation, a foreign object detection device that operates by pressure on the door contact surface of an elevator car door is used as a door safety device that detects that a foreign object such as an elongated string, rope, or cord is caught in the door. One provided (for example, see Patent Document 1), or one provided with a light projecting means on one of the upper and lower sides of the elevator doorway near the door when the door is fully closed (for example, a patent) Various things have been proposed such as Document 2).

一方、エレベータの出入口付近に設けた光電装置等の安全装置が連続的に動作すると、戸開状態が継続しエレベータが使用不能となるため、安全装置が一定時間以上継続して動作すると、安全装置を無効として強制的に戸閉する強制戸閉手段を備えたものがある(例えば特許文献3或いは特許文献4参照)。   On the other hand, if a safety device such as a photoelectric device provided in the vicinity of the elevator entrance is operated continuously, the door open state continues and the elevator becomes unusable, so if the safety device continues to operate for a certain time or more, the safety device Is provided with a forced door closing means for forcibly closing the door (see, for example, Patent Document 3 or Patent Document 4).

特開2004−262636号公報JP 2004-262636 A 特開2008−169009号公報JP 2008-169209 A 特開平11−29284号公報JP-A-11-29284 特開2007−168962号公報JP 2007-168962 A

上記特許文献1或いは特許文献2のように、細長い紐やロープ或いはコード類等の異物がドアに挟まれていることを検出する異物検出装置を備えたドア安全装置において、故障等により異物検出装置が実際には存在しない異物を検知し続ける状態になったとき、ドアは開放状態を継続し、エレベータは走行不能の状態となるため、上記特許文献3或いは特許文献4のように、ロープ等を検知する異物検出装置を無効とし、強制的に戸閉することが考えられる。   As described in Patent Document 1 or Patent Document 2, in a door safety device provided with a foreign object detection device that detects that a foreign object such as an elongated string, rope, or cord is sandwiched between doors, When the door is in a state where it continues to detect foreign objects that do not actually exist, the door continues to open and the elevator cannot travel. It can be considered that the foreign object detection device to be detected is disabled and the door is forcibly closed.

ところが、このような異物検出装置が異物の存在を検知し続けた場合、これが本当に異物の存在を示すものか、或いは何らかの故障、例えば投光器や受光器の故障、投光器や受光器へのゴミ・汚れ等の付着、投受光器に加えて反射板を有するものでは反射板の故障や汚れの付着、電気回路の故障や断線、ドアの敷居へのゴミ詰まり等々、によるものかが区別できず、またこれを区別するための有効な手段もこれまで存在しなかった。このため、異物検出装置の故障と判断がつかないままエレベータの運転を継続すると、エレベータが階床に停止する度に長時間に亘ってドアが開放され、エレベータの運転効率が極端に悪化するだけでなく、実際に紐やロープ等がドアに挟まっていてもそれを検知できないという極めて危険な事態を招くことにもなりかねない。
また、上記特許文献3や特許文献4のように、全ての戸開要請を無効とする強制戸閉を行うと、実際に紐やロープが挟まっていた場合でも強制戸閉を途中で中断することができず、極めて危険な状態にもなりかねない。
However, if such a foreign object detection device continues to detect the presence of a foreign object, does it really indicate the presence of a foreign object, or some failure, for example, a projector or receiver failure, dust or dirt on the projector or receiver If there is a reflector in addition to the light emitter / receiver, etc., it cannot be distinguished whether it is due to a reflector failure or dirt, electrical circuit failure or disconnection, dust clogging on the door sill, etc. There has never been an effective means to distinguish this. For this reason, if the operation of the elevator is continued without determining that the foreign object detection device is broken, the door is opened for a long time each time the elevator stops on the floor, and the operation efficiency of the elevator is extremely deteriorated. In addition, even if a string or rope is actually caught in the door, it may lead to a very dangerous situation where it cannot be detected.
In addition, as in Patent Document 3 and Patent Document 4 described above, if forced door closing that invalidates all door opening requests is performed, forced door closing is interrupted even if a string or rope is actually caught. Cannot be done, and can be extremely dangerous.

本発明は、上記の問題点に鑑みてなされたもので、異物検出装置が異物を検知し続ける事態が発生した場合は一時的に異物検出装置を無効として低速で戸閉を行ない、その低速戸閉が連続して所定回数繰り返された場合は実際に紐やロープ等がドアに挟まっている可能性は極めて低く、従って異物検出装置に何らかの故障が発生したと判断することにより、早期にその故障対策をとることができるエレベータのドア安全装置を提供することを目的としたものである。   The present invention has been made in view of the above problems, and when a situation in which the foreign object detection device continues to detect foreign objects occurs, the foreign object detection device is temporarily disabled and the door is closed at low speed. If the closing is repeated a predetermined number of times, it is very unlikely that a string or rope is actually caught in the door, so it is judged early that some failure has occurred in the foreign object detection device. An object of the present invention is to provide an elevator door safety device capable of taking measures.

本発明は、紐やロープ等の異物がドアに挟まったことを検出する異物検出装置を備えたエレベータにおいて、戸閉時に前記異物検出装置が異物を検知して前記ドアの反転戸開を所定回数繰り返すと、前記異物検出装置を一時的に無効として低速で戸閉する低速戸閉手段と、該低速戸閉手段による低速戸閉が連続して所定回数繰り返されると前記異物検出装置の故障と判定する故障判定手段とを備えたことを特徴とするものである。 The present invention provides an elevator equipped with a foreign object detection device that detects that a foreign object such as a string or a rope is caught in a door, and the foreign object detection device detects the foreign object when the door is closed, and the door is inverted a predetermined number of times. When it is repeated, it is determined that the foreign object detection device has failed if the foreign object detection device is temporarily disabled and the low speed door closing means for closing the door at a low speed and the low speed door closing operation by the low speed door closing device are repeated a predetermined number of times. And a failure determination means.

また本発明は、紐やロープ等の異物がドアに挟まったことを検出する異物検出装置を備えたエレベータにおいて、前記異物検出装置が異物を検知して前記ドアの開放状態が所定時間以上継続すると、前記異物検出装置を一時的に無効として低速で戸閉する低速戸閉手段と、該低速戸閉手段による低速戸閉が連続して所定回数繰り返されると前記異物検出装置の故障と判定する故障判定手段とを備えたことを特徴とするものである。 The present invention continues at an elevator foreign matter such as string or rope provided with a foreign matter detecting device for detecting that caught in the door, before Symbol foreign object detecting device opening state of the door by detecting a foreign substance for a predetermined time or more Then, when the foreign object detection device is temporarily disabled and the low speed door closing means for closing the door at a low speed and the low speed door closing operation by the low speed door closing means are continuously repeated a predetermined number of times, it is determined that the foreign object detection device has failed. And a failure determination means.

本発明によれば、何らかの理由で異物検出装置が異物を検知し続け、その結果低速戸閉が行われた場合は、その低速戸閉が連続して所定回数発生した時点で異物検出装置の故障と判定するようにしたので、異物検出装置の故障を早期に発見してその対策をとることが可能となり、異物検出装置の故障と判断のつかない状態のままエレベータの運転を継続することにより生じる運転効率の悪化や、乗客が異物検出装置の故障に気付かないままエレベータの運転を継続する危険な状態を回避することができる。   According to the present invention, when the foreign object detection device continues to detect foreign objects for some reason, and as a result, low-speed door closing is performed, the foreign object detection device malfunctions when the low-speed door closing occurs continuously a predetermined number of times. It is possible to detect the failure of the foreign object detection device at an early stage and take countermeasures for it, and it is caused by continuing the operation of the elevator in a state where it cannot be determined that the foreign object detection device has failed. It is possible to avoid a dangerous situation in which the operation efficiency is deteriorated and the passenger continues to operate the elevator without noticing the failure of the foreign object detection device.

また、上記低速戸閉時には、異物検出装置以外の戸開要請に応じるようにしたので、実際に紐やロープ等が挟まっている場合には、これに気付いた乗客が戸開釦の操作等により低速戸閉を中断し、ドアを反転戸開させることができ、低速戸閉後に紐やロープがドアに挟まったまま走行を開始する危険な事態を回避することができる。   In addition, when the low-speed door is closed, a door opening request other than the foreign object detection device is responded. Therefore, when a string or rope is actually caught, the passenger who notices this is operated by operating the door opening button, etc. The low-speed door closing can be interrupted, and the door can be reversed and the dangerous situation of starting traveling after the low-speed door closing with the string or rope sandwiched between the doors can be avoided.

実施の形態1.
以下、本発明の一実施形態を図1及び図2に基づいて説明する。
図1は本発明の実施の形態1におけるエレベータのドア安全装置の全体構成を示す図、図2は図1のドア安全装置において、エレベータ制御装置の本発明に係る部分の処理手順を説明するためのフローチャートである。
Embodiment 1 FIG.
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 and 2.
FIG. 1 is a diagram showing an overall configuration of an elevator door safety device according to Embodiment 1 of the present invention, and FIG. 2 is a diagram illustrating a processing procedure of a portion of the elevator control device according to the present invention in the door safety device of FIG. It is a flowchart of.

図1において、1はエレベータのかご、2はかごドア、3はかごドア2を駆動するモータ等からなるドア駆動装置、4及び5は異物センサとしての投光手段及び受光手段で、投光手段4は出入口の中央部でトランサムの下面或いはその近辺に、受光手段5は敷居部或いはその近辺に設けられ、必要時に投光手段4から受光手段5に向けて光線やレーザービームが照射される。ここではこれらの投受光手段4,5と後述の異物判定手段とで異物検出装置を構成する例を示しており、投光手段4からの光線やレーザービームを遮られたことで異物の存在を検知するようになっている。   In FIG. 1, 1 is an elevator car, 2 is a car door, 3 is a door driving device comprising a motor or the like for driving the car door 2, and 4 and 5 are light projecting means and light receiving means as foreign matter sensors. 4 is a central portion of the entrance / exit, and is provided on the lower surface of the transom or in the vicinity thereof, and the light receiving means 5 is provided on or near the sill, and a light beam or a laser beam is irradiated from the light projecting means 4 to the light receiving means 5 when necessary. Here, an example is shown in which a foreign matter detection device is constituted by these light projecting / receiving units 4 and 5 and a foreign matter determining means described later. The presence of foreign matter is obstructed by blocking the light beam or laser beam from the light projecting unit 4. It comes to detect.

6はかご操作盤、7は戸開釦、8は戸閉釦、9はかご呼び釦、10は種々の案内表示や音声案内等の報知を行う報知装置である。20はエレベータの運行制御を行うと共に、異物検出装置や戸開閉釦からの信号、その他エレベータの運転状況等に応じてドアの開閉指令信号を出力するエレベータ制御装置であり、入力回路21、出力回路22、エレベータの昇降制御を行う昇降制御手段23、報知装置10に対して種々の案内表示や音声案内等の制御を行う表示案内制御手段24、外部との通信を行うための通信手段25、投光手段4からの光線やレーザービームを受光手段5が受信しないことで異物の存在を検知する異物判定手段26、異物検知により反転戸開を所定回数繰り返したか、或いは異物検知によりドア開放状態が所定時間継続すると異物検知を一時的に無効として低速戸閉指令を出力する低速戸閉手段27、異物検知を無効とした低速戸閉が連続して所定回数繰り返されると異物検出装置の故障と判定する故障判定手段28、異物判定手段26や戸開閉釦7,8からの信号、その他エレベータの運転状況等に応じてドアの開閉指令を出力する戸開閉指令手段29等で構成されている。
30はエレベータ制御装置20からの戸開閉指令信号に応じてドア駆動装置3のドアモータを制御するドアモータ制御装置、31は一般電話回線等の公衆回線、32はエレベータ等の保守や監視を公衆回線31を介して外部から遠隔で行う監視センターである。
6 is a car operation panel, 7 is a door open button, 8 is a door close button, 9 is a car call button, and 10 is a notification device for notifying various guidance displays and voice guidance. Reference numeral 20 denotes an elevator control device that controls the operation of the elevator, and outputs a signal from the foreign object detection device and the door opening / closing button, and other door opening / closing command signals according to the operating state of the elevator, and the like. 22. Elevator control means 23 for performing elevator elevator control, display guidance control means 24 for controlling the notification device 10 such as various guidance displays and voice guidance, communication means 25 for communicating with the outside, Foreign matter determination means 26 that detects the presence of foreign matter by the light receiving means 5 not receiving the light beam or laser beam from the light means 4, repeated reversal door opening is repeated a predetermined number of times by foreign matter detection, or the door open state is predetermined by foreign matter detection If the time continues, the low-speed door closing means 27 that temporarily disables foreign object detection and outputs a low-speed door closing command, and the low-speed door closing that disables foreign object detection continues to be predetermined. The door opening / closing command for outputting a door opening / closing command according to a signal from the failure determining means 28, the foreign object determining means 26, the door opening / closing buttons 7 and 8 and other elevator operating conditions, etc. It comprises command means 29 and the like.
30 is a door motor control device that controls the door motor of the door drive device 3 in response to a door opening / closing command signal from the elevator control device 20, 31 is a public line such as a general telephone line, 32 is a public line 31 for maintenance and monitoring of the elevator and the like It is a monitoring center that is performed remotely from outside.

以上の構成において、次に本発明に係るエレベータのドア安全装置の動作を図2のフローチャートに基づいて説明する。   Next, the operation of the elevator door safety device according to the present invention will be described based on the flowchart of FIG.

このフローは、エレベータが呼びに応じて任意の階に到着し、戸開を開始すると、或いは呼びがなく任意の階で戸閉待機中にその階の乗場呼び釦が操作され、戸開を開始するとスタートする。
まず、ステップS1で、異物検出装置を一時的に無効とした低速戸閉が行われた回数をMとし、これを記憶しているメモリ(図示せず)から読み出す。なお、Mの初期値は0とする。ドアが開き始め、戸開を完了するとドアはそのまま戸開状態を維持する(ステップS2)。
In this flow, when an elevator arrives at any floor in response to a call and starts opening the door, or when there is no call and the door is waiting to close at any floor, the hall call button on that floor is operated to start the door opening. Then start.
First, in step S1, the number of times that the low-speed door closing that temporarily disables the foreign object detection device is performed is set as M, and is read from a memory (not shown) that stores this. Note that the initial value of M is 0. When the door begins to open and the door opening is completed, the door maintains the door open state (step S2).

次にステップS3で異物検出装置による異物検知により既に反転戸開を所定回数繰り返したか、或いは異物検出装置による異物検知によりドア開放状態が所定時間継続したか否かを判定し、何れもNOである場合はステップS4へと進む。
ステップS4では異物検出装置により異物を検知したか否かを判定し、異物を検知している場合はステップS2へと戻って戸開状態を維持するが、異物を検知していない場合はステップS5で戸開放時間が満了したか否かを判定し、戸開放時間を満了するとステップS6へと進んで通常の動作(通常速度)で戸閉を開始する。
Next, in step S3, it is determined whether or not the reverse door opening has already been repeated a predetermined number of times by foreign matter detection by the foreign matter detection device, or whether or not the door open state has continued for a predetermined time by foreign matter detection by the foreign matter detection device. In this case, the process proceeds to step S4.
In step S4, it is determined whether or not a foreign object has been detected by the foreign object detection device. If a foreign object is detected, the process returns to step S2 to maintain the door open state. If no foreign object is detected, step S5 is performed. Then, it is determined whether or not the door opening time has expired. When the door opening time has expired, the routine proceeds to step S6, where the door closing is started at a normal operation (normal speed).

ステップS7では、ゲートスイッチ等が閉じて戸閉を完了したか否かを判定し、まだ戸閉動作中であればステップS8へと進み、異物検出装置が異物を検知したか否かを判定する。異物を検知した場合はステップS8からステップS10へと進み、ドアを反転戸開して再びステップS2へと戻る。また異物が検知されなくても、セイフティシュー(図示せず)の作動や戸開釦7の操作など、異物検出装置による異物検知以外の戸開要請があった場合にもステップS9からステップS10へと進み、ドアを反転戸開してステップS2へと戻る。そして戸閉動作中に異物の検知も他の戸開要請もない場合には通常の戸閉動作を継続し、戸閉を完了するとステップS7からステップS11へと進み、前述のM(この時点では、Mはまだ初期値0のままである)を0にリセットして更新記憶し、すなわち通常の戸閉動作により戸閉が完了した場合にはMを0にリセットしてこのフローを終了する。
そしてこのフローを終了するとエレベータは走行開始可能の状態となり、応答すべき呼びがある場合はその呼びに向かって走行を開始し、応答すべき呼びが無い場合はそのまま戸閉待機となり、新たな呼びの発生に備えることになる。
In step S7, it is determined whether or not the gate switch is closed and the door is closed. If the door is still being closed, the process proceeds to step S8 to determine whether or not the foreign object detection device has detected a foreign object. . If a foreign object is detected, the process proceeds from step S8 to step S10, the door is reversed and the process returns to step S2. Even if a foreign object is not detected, even when there is a door opening request other than the foreign object detection by the foreign object detecting device, such as the operation of a safety shoe (not shown) or the operation of the door opening button 7, the process goes from step S9 to step S10. The door is reversed and the door is opened, and the process returns to step S2. If there is no foreign object detection or other door opening request during the door closing operation, the normal door closing operation is continued. When the door closing is completed, the process proceeds from step S7 to step S11. , M is still at the initial value 0) and is updated and stored, that is, when the door closing is completed by a normal door closing operation, M is reset to 0 and this flow is ended.
At the end of this flow, the elevator is ready to start running, and if there is a call to be answered, it starts to run. Will be prepared for the occurrence of

一方、異物検出装置が異物を検知し続け、上記ステップS8を経てS10により反転戸開を所定回数繰り返したり、或いはステップS4においてYESと判定され続けることによりドア開放状態が所定時間継続した場合には、上記ステップS3の判定においてYESとなり、ステップS3からステップS12へと進む。ステップS12では戸開放時間が満了したか否かを判定し、満了していない場合はステップS2へと戻るが、戸開放時間を満了するとステップS13へと進み、異物検出装置による異物検知を戸閉完了まで一時的に無効とし、ブザーを鳴動させるなどして報知装置10による報知を行ないながら、低速でドアの戸閉を開始する。そしてステップS14で低速戸閉を完了したか否かを判定し、まだであればステップS15で異物検出装置による異物検知以外の戸開要請、例えば戸開釦7の操作等による戸開要請があるか否かを判定し、あればステップS16で低速戸閉を中断して反転戸開を行ないステップS2へと戻るが、なければステップS13へと戻って低速戸閉を続行する。こうして低速戸閉を完了すると、ステップS17でM=M+1として新たなMの値(今の場合は元のMが0であるのでこれに1をプラスし、新たなMの値は1となる)を更新記憶する。   On the other hand, when the foreign object detection device continues to detect foreign objects and repeats the opening of the reverse door a predetermined number of times through S10 described above or continues to be determined as YES in step S4, the door open state continues for a predetermined time. The determination in step S3 is YES, and the process proceeds from step S3 to step S12. In step S12, it is determined whether or not the door opening time has expired. If the door opening time has not expired, the process returns to step S2, but if the door opening time has expired, the process proceeds to step S13 and the foreign object detection by the foreign object detection device is closed. The door is closed at a low speed while the notification device 10 performs notification by, for example, temporarily disabling until completion and sounding a buzzer. In step S14, it is determined whether or not the low-speed door closing is completed. If not yet, in step S15, there is a door opening request other than the foreign object detection by the foreign object detection device, for example, an operation of the door opening button 7 or the like. In step S16, the low-speed door closing is interrupted, the reverse door opening is performed, and the process returns to step S2. If not, the process returns to step S13 to continue the low-speed door closing. When the low-speed door closing is thus completed, a new value of M is set as M = M + 1 in step S17 (in this case, since the original M is 0, 1 is added thereto, and the new value of M becomes 1). Is updated and stored.

そして、ステップS18ではM=3であるか否かを判定し、すなわちここでは所定回数を3回とし、異物検出装置を無効とする低速戸閉が3回連続して行われたか否かを判定する。今の時点ではまだM=1であり、ステップS16の判定はNOとなるので、このままフローを終了してエレベータは走行開始可能の状態となり、応答すべき呼びがある場合はその呼びに向かって走行を開始し、応答すべき呼びが無い場合はそのまま戸閉待機となり、新たな呼びの発生に備えることになる。   In step S18, it is determined whether or not M = 3. That is, it is determined whether or not the low-speed door closing that disables the foreign object detection device has been performed three times in succession, with the predetermined number of times being three. To do. At this point, M is still 1 and the determination in step S16 is NO. Therefore, the flow is finished as it is, and the elevator is ready to start running. If there is a call to be answered, run toward that call. When there is no call to be answered, the door-opening standby is performed as it is to prepare for the generation of a new call.

こうして再びエレベータが呼びに応じて任意の階に到着し、或いは呼びが無く戸閉待機中にその階の乗場呼び釦が操作され、戸開を開始すると図2のフローが再びスタートする。ステップS1では再びMの値がメモリから読み出されるが、今度はM=1として更新記憶されているので、M=1としてステップS2以下が実行される。そして、前回の低速戸閉中に或いは低速戸閉後に、異物検出装置が異物を検知し続ける状態が何らかの理由で解消している場合は、ステップS2〜ステップS10の実行により通常の戸閉動作が行われ、戸閉を完了すると、ステップS7からステップS11へと進み、Mを0にリセットして更新記憶する。すなわち、この場合は、正常に戸閉が行われ低速戸閉の原因が解消しているのでM=0にリセットし、このフローを終了する。   In this way, the elevator again arrives at an arbitrary floor in response to a call, or the landing call button on that floor is operated while there is no call and the door is closed, and when the door is opened, the flow of FIG. 2 starts again. In step S1, the value of M is read again from the memory, but since this time is updated and stored as M = 1, M = 1 and step S2 and subsequent steps are executed. If the state where the foreign object detection device continues to detect foreign objects has been resolved for some reason during the previous low-speed door closing or after the low-speed door closing, the normal door closing operation is performed by executing steps S2 to S10. When the door closing is completed, the process proceeds from step S7 to step S11, where M is reset to 0 and updated and stored. That is, in this case, the door is normally closed and the cause of the low-speed door closing is eliminated, so that M = 0 is reset and this flow is ended.

一方、前回の低速戸閉後に、エレベータが他の階に移動したり、或いは戸閉待機状態となったにも拘わらず、まだ異物検出装置が異物を検知し続けている場合には、実際に紐やロープ等がドアに挟まっている可能性は極めて低く、異物検出装置の故障である可能性が高いので、この場合は、ステップS2〜ステップS10の実行により再び反転戸開を繰り返すか或いはドア開放状態が所定時間継続することとなり、その後前回と同様にステップS3からステップS12へと進み、ステップS13で再び低速戸閉が行われる。そして低速戸閉が完了するとステップS14からステップS17へと進み、元のMに1が加算されて今度はM=2となり、この新たなMの値が更新記憶される。   On the other hand, if the foreign object detection device continues to detect foreign objects even though the elevator has moved to another floor after the previous low-speed door closure or entered the door-closing standby state, The possibility that a string or rope is caught in the door is very low, and it is highly likely that the foreign object detection device is out of order. In this case, the reverse door opening is repeated again by executing Steps S2 to S10, or the door The open state continues for a predetermined time, and thereafter, similarly to the previous time, the process proceeds from step S3 to step S12, and the low-speed door closing is performed again in step S13. When the low-speed door closing is completed, the process proceeds from step S14 to step S17, 1 is added to the original M, and this time, M = 2, and this new value of M is updated and stored.

こうして同様の手順が繰り返され、依然として異物検出装置が異物を検知している状態が継続している場合は、やがて3度目の低速戸閉に至ることとなり、低速戸閉完了後、ステップS17においてM=3となる。その結果ステップS18の判定においてYESとなり、ステップS19へと進んで異物検出装置の故障と判定する。そして異物検出装置の故障と判定した後はステップS20において、故障時のドア制御に移行し、以後はこの故障時の動作手順によってドア制御や表示案内制御を行うことになる。   If the same procedure is repeated in this manner and the foreign object detection device continues to detect the foreign object, it will eventually reach the third low-speed door closing. = 3. As a result, the determination in step S18 is YES, and the process proceeds to step S19, where it is determined that the foreign object detection device has failed. After determining that the foreign object detection device has failed, the process proceeds to door control at the time of failure in step S20, and thereafter door control and display guidance control are performed according to the operation procedure at the time of this failure.

故障時の動作手順によるドア制御や表示案内制御の例としては、例えば、異物検出装置の故障と判定すると、その旨を公衆回線31を介して監視センター32に通報するとともに、保守点検員が到着し復旧させるまでの間は、異物検出装置を無効としてエレベータの運転を継続する。ただし異物検出装置を無効としている間は、その旨をかご内や乗場に適宜表示すると共に、戸閉時には前述のステップS13における低速戸閉時と同様に常に音声案内やブザー等で乗客に警告を報知しながら低速で戸閉を行うことなどが考えられる。   As an example of door control or display guidance control based on the operation procedure at the time of failure, for example, when it is determined that the foreign object detection device has failed, a notification to that effect is sent to the monitoring center 32 via the public line 31, and a maintenance inspector arrives. Until it is restored, the foreign object detection device is disabled and the operation of the elevator is continued. However, while the foreign object detection device is disabled, a message to that effect is displayed appropriately in the car and at the landing, and when the door is closed, a warning is always given to the passenger with voice guidance, a buzzer, etc. as in the case of the low-speed door closing in step S13 described above. It may be possible to close the door at low speed while informing.

このように、本発明によれば、異物が存在しないにも拘わらず何らかの理由で異物を検知している状態が継続するような場合、低速戸閉が所定回数連続して行われたことで異物検出装置の故障と判断するようにしたので、異物検出装置が異物を検知し続ける故障を早期に発見してその対策をとることが可能となり、異物検出装置の故障と判断がつかない状態のままエレベータの運転を継続することにより生じる種々の不都合を解消することができる。   As described above, according to the present invention, when the state in which the foreign object is detected for some reason continues even though there is no foreign object, the foreign object is detected because the low-speed door closing is continuously performed a predetermined number of times. Since the detection device is judged to be faulty, it is possible to detect a failure where the foreign matter detection device continues to detect foreign matter at an early stage and take countermeasures. Various inconveniences caused by continuing the operation of the elevator can be solved.

また、低速戸閉中に、異物検出装置による異物検知以外の戸開要請があれば反転戸開するようにしたので、実際に紐やロープ等が挟まっている場合には、乗客がこれに気付き戸開釦の操作等により低速戸閉を中断し、ドアを反転戸開させることができ、低速戸閉後に紐やロープがドアに挟まったまま走行を開始する危険な事態を回避することができる。   In addition, when the door is open other than the foreign object detection by the foreign object detection device, the reverse door is opened while the low speed door is closed, so if the string or rope is actually caught, the passenger will notice this The low-speed door closing can be interrupted by operating the door open button, etc., and the door can be reversed, and the dangerous situation of starting running with the string or rope caught in the door after the low-speed door closing can be avoided. .

その他の実施形態
上記の実施形態では、異物検出装置の故障と判断する基準をM=3、すなわち強制戸閉が連続して3回行われたときとしているが、勿論所定回数は2回以下であってもよいし、或いは4回以上に設定してもよい。
Other Embodiments In the above embodiment, the criterion for determining a failure of the foreign object detection device is M = 3, that is, when forced door closing is performed three times continuously, of course, the predetermined number of times is two or less. It may be set or may be set to four times or more.

また、上記の実施形態では、通常の戸閉完了時にのみM=0にリセットするようにしているが、常時(異物検出装置の有効無効に拘わらず)異物センサの状況を監視し、例えば投光器から受光器に向けて照射中に受光器が一瞬でも受光状態となった場合のように、異物の存在しない状態(異物によって遮光されなかった状態)を一瞬でも検知した場合、或いは所定時間検知した場合は異物検出装置の故障(異物を検知し続ける故障)が解消したものと見做し、その時点でM=0にリセットするようにしてもよい。同様に、故障時のドア制御中においても異物センサの状況を監視し、異物の存在しない状態を一瞬でも検知した場合、或いは所定時間検知した場合は異物検出装置の故障が解消したものと見做し、通常のドア制御に復旧させるようにしてもよい。   In the above-described embodiment, M = 0 is reset only when the normal door closing is completed. However, the state of the foreign matter sensor is constantly monitored (regardless of whether the foreign matter detection device is valid or invalid). When a non-existent state (a state where light is not shielded by a foreign object) is detected even for a moment, or when a predetermined time is detected, such as when the light receiver is in a light-receiving state even for a moment during irradiation toward the light receiver May be considered to have solved the failure of the foreign object detection device (the failure to continue detecting foreign objects), and at that time, M = 0 may be reset. Similarly, the status of the foreign matter sensor is monitored even during door control at the time of failure, and if the state where no foreign matter is present is detected even for a moment, or if it is detected for a predetermined time, it is considered that the failure of the foreign matter detection device has been resolved. However, normal door control may be restored.

また、上記の実施形態では、出入口が両開き式のドアである場合を例として説明しているが、勿論片開き式のドアの場合であっても、同様に本発明適用することができることは言うまでもない。   In the above embodiment, the case where the doorway is a double-open door is described as an example, but it goes without saying that the present invention can be similarly applied to a case of a single-open door. Yes.

また、上記の実施形態では、異物検出装置は投光手段と受光手段をかご出入口の上下に配置しているが、これに限らず投受光手段を上下の一方に、反射板を他方に設けるようにしたものであってもよいし、その他感圧センサを用いたものや、機械式のもの、或いは複数の装置やセンサの組合わせで検知するものなど、ドアの全閉付近で紐やロープなどの異物を検知できるものであればどのようなものであってもよい。   Further, in the above embodiment, the foreign object detection device has the light projecting means and the light receiving means arranged above and below the car doorway. However, the present invention is not limited to this. It may be one that has been used, or other devices using pressure sensors, mechanical devices, or devices that are detected by a combination of multiple devices and sensors, such as strings and ropes near the fully closed door Any object can be used as long as it can detect the foreign matter.

その他、本発明は上記の実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲で、種々の改変を施すことができる。   In addition, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention.

本発明の実施の形態1におけるエレベータのドア安全装置の全体構成を示す図である。It is a figure which shows the whole structure of the door safety device of the elevator in Embodiment 1 of this invention. 図1のドア安全装置において、エレベータ制御装置の本発明に係る部分の処理手順を説明するためのフローチャートである。2 is a flowchart for explaining a processing procedure of a portion according to the present invention of an elevator control device in the door safety device of FIG. 1.

符号の説明Explanation of symbols

1 かご
2 かごドア
3 ドア駆動装置
4 投光手段
5 受光手段
6 かご操作盤
7 戸開釦
8 戸閉釦
9 かご呼び釦
10 報知装置
20 エレベータ制御装置
26 異物判定手段
27 低速戸閉手段
28 故障判定手段
30 ドアモータ制御装置
31 公衆回線
32 監視センター
DESCRIPTION OF SYMBOLS 1 Car 2 Car door 3 Door drive device 4 Light projection means 5 Light receiving means 6 Car operation panel 7 Door open button 8 Door close button 9 Car call button 10 Notification device 20 Elevator control device 26 Foreign object judgment means 27 Low speed door close means 28 Failure Judgment means 30 Door motor control device 31 Public line 32 Monitoring center

Claims (5)

やロープ等の異物がドアに挟まったことを検出する異物検出装置を備えたエレベータにおいて、戸閉時に前記異物検出装置が異物を検知して前記ドアの反転戸開を所定回数繰り返すと、前記異物検出装置を一時的に無効として低速で戸閉する低速戸閉手段と、該低速戸閉手段による低速戸閉が連続して所定回数繰り返されると前記異物検出装置の故障と判定する故障判定手段とを備えたことを特徴とするエレベータのドア安全装置。 In an elevator equipped with a foreign object detection device that detects that a foreign object such as a string or rope is caught in the door, when the foreign object detection device detects the foreign object when the door is closed and repeats the reverse door opening of the door a predetermined number of times, A low-speed door closing unit that temporarily disables the foreign object detection device and closes the door at a low speed, and a failure determination unit that determines that the foreign object detection device has failed when the low-speed door closing operation by the low-speed door closing unit is repeated a predetermined number of times. And an elevator door safety device. やロープ等の異物がドアに挟まったことを検出する異物検出装置を備えたエレベータにおいて、前記異物検出装置が異物を検知して前記ドアの開放状態が所定時間以上継続すると、前記異物検出装置を一時的に無効として低速で戸閉する低速戸閉手段と、該低速戸閉手段による低速戸閉が連続して所定回数繰り返されると前記異物検出装置の故障と判定する故障判定手段とを備えたことを特徴とするエレベータのドア安全装置。 An elevator having a foreign matter detecting system foreign matter such as string or rope detects that caught in the door, the prior Symbol foreign object detecting device opening state of the door by detecting the foreign matter continues for a predetermined time or longer, the foreign substance detecting A low-speed door closing means for temporarily disabling the apparatus at a low speed, and a failure determination means for determining that the foreign object detection apparatus has failed when the low-speed door closing by the low-speed door closing means is continuously repeated a predetermined number of times. An elevator door safety device characterized by comprising: 前記低速戸閉手段による低速戸閉時に、前記異物検出装置以外の戸開要請があった場合は、反転戸開することを特徴とする請求項1又は請求項2に記載のエレベータのドア安全装置。 3. The elevator door safety device according to claim 1, wherein when the low-speed door closing means closes the door at a low speed, if there is a door opening request other than the foreign object detection device, the reverse door is opened. . 前記故障判定手段により異物検出装置の故障と判定すると、故障時のドア制御によりエレベータの運転を継続することを特徴とする請求項1乃至請求項3に記載のエレベータのドア安全装置。 The elevator door safety device according to any one of claims 1 to 3, wherein when the failure determination means determines that the foreign object detection device has failed, the operation of the elevator is continued by door control at the time of failure. 前記故障時のドア制御による運転の継続中に、前記異物検出装置が異物の存在しない状態を検知すると、通常運転に復帰させることを特徴とする請求項4に記載のエレベータのドア安全装置。 5. The elevator door safety device according to claim 4, wherein when the foreign object detection device detects a state in which no foreign object exists while the operation by the door control at the time of the failure is continued, the elevator door safety device is returned to the normal operation.
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