JP2004043136A

JP2004043136A - Passenger conveyor

Info

Publication number: JP2004043136A
Application number: JP2002204426A
Authority: JP
Inventors: Tadaaki Chiba; 千葉　忠昭; Shinichiro Yamaguchi; 山口　伸一朗; Takeyoshi Ando; 安藤　武喜
Original assignee: Hitachi Building Systems Co Ltd
Current assignee: Hitachi Building Systems Co Ltd
Priority date: 2002-07-12
Filing date: 2002-07-12
Publication date: 2004-02-12

Abstract

<P>PROBLEM TO BE SOLVED: To securely stop a foot step at appropriate decelerated speed and within a prescribed stopping distance at the time of operation of a safety device. <P>SOLUTION: The passenger conveyor is equipped with a direct-current power source 9, a load detection device 10 and a brake control device 11. The direct-current power source 9 transforms alternative-current power of the alternative power source 1 to direct-current power of the variable voltage, and supplies the direct-current power to the coil of an electric motor 3. The load detection device 10 detects the load of the passenger conveyor and outputs a load detected value SI. The brake control device 11 outputs an ignition signal Sg to the direct-current power source 9 so as to be the prescribed stopping distance based on the load detected value SI. A braking torque of the electric motor 3 is controlled so as to be the prescribed stopping distance based on the load detected value SI, and the foot step 5 is stopped at the constant decelerated speed irrespective of the size of the load of the passenger conveyor. The foot step 5 is securely stopped at appropriate decelerated speed and within the prescribed stopping distance at the time of operation of the safety device 7 thereby. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、エスカレータや歩く歩道等の乗客コンベアに係り、特に、安全装置の動作に応じた踏段の停止を制御するのに好適な乗客コンベアに関する。
【０００２】
【従来の技術】
一般に、エスカレータや歩く歩道等の乗客コンベアは、乗客の機器への挟まれや、電動機の過負荷等を検出する種々の安全装置が設置されており、これらの安全装置の動作に応じて制動装置により一定の制動力で駆動装置を制動して踏段を非常停止させるようになっていた。このときの乗客コンベアの制動距離は乗客コンベアの最大載積時にも規定の停止距離で踏段を停止できるよう建築基準法等により定められており、これを満たすようにあらかじめ設定した一定の制動力で制動するものであった。
【０００３】
【発明が解決しようとする課題】
ところで、前述した従来の乗客コンベアでは、乗客コンベアの最大載積時にも規定の停止距離で踏段を停止できるよう一定の制動力で制動するものであるため、乗客の積載状態によっては停止時の減速度が増大し、乗客に不快感を与えるものとなるとともに、乗客の姿勢によっては転倒事故を引き起こす恐れがあった。
【０００４】
本発明はこのような従来技術における実情に鑑みてなされたもので、その目的は、安全装置の動作時に適切な減速度で、かつ規定の停止距離内で確実に踏段を停止させることのできる乗客コンベアを提供することにある。
【０００５】
【課題を解決するための手段】
この目的を達成するために本発明の請求項１記載に係る発明は、交流電源と、この交流電源の断続を行う接触子と、この接触子を介して前記交流電源から電力の供給を受け、駆動力を付与可能な電動機および減速力を付与可能な減速機を備えた駆動装置と、この駆動装置と連結されたスプロケットおよびこのスプロケットに巻き掛けられたチェーンを介して移動可能な無端状に連結された踏段と、前記電動機に制動力を付与し踏段の移動を停止させる制動装置と、乗客コンベアの異常を検出して検出信号を出力する安全装置と、前記検出信号に応じて前記接触子を開路し前記制動装置を動作させて前記踏段の移動を停止させる乗客コンベア制御装置とを有する乗客コンベアにおいて、前記交流電源の交流電力を可変電圧の直流電力に変換し、この直流電力を前記電動機の少なくとも１つの巻線に供給する直流電源装置と、乗客コンベアの負荷を検出し負荷検出値を出力する負荷検出装置と、前記負荷検出値に基づきあらかじめ定めた停止距離となるよう点弧信号を前記直流電源装置に出力する制動制御装置とを備えた構成にしてある。
【０００６】
前記のように構成した本発明の請求項１に係る発明によれば、乗客コンベアの異常を検出した安全装置は検出信号を乗客コンベア制御装置および制動制御装置に出力する。乗客コンベア制御装置は検出信号に応じ接触子を開路して交流電源から電動機への電力供給を遮断し、制動制御装置は検出信号に応じ負荷検出装置から出力された負荷検出値に基づきあらかじめ定めた停止距離となるよう点弧信号を直流電源装置に出力する。そして、直流電源装置は交流電源の交流電力を可変電圧の直流電力に変換し、この直流電力を電動機の少なくとも１つの巻線に供給するとともに、これに応じて電動機は制動トルクを発生させ踏段を減速し停止させる。このように負荷検出値に基づきあらかじめ定めた停止距離となるよう電動機の制動トルクが制御され、乗客が多く負荷が大きな時は大きな制動トルクを発生させ、一方、乗客が少なく負荷が小さいときは小さな制動トルクを発生させることにより、負荷の大きさに関わりなく一定の減速度で踏段を停止させることができ、したがって、安全装置の動作時に適切な減速度で、かつ規定の停止距離内で確実に踏段を停止させることができる。
【０００７】
また、本発明の請求項２記載に係る発明は、前記負荷検出装置は、前記電動機に供給される電流を検出し電流検出値を出力する電流検出手段と、前記電流検出値を乗客コンベアの負荷量に換算して前記負荷検出値を出力する負荷換算手段とから成る構成にしてある。
【０００８】
前記のように構成した本発明の請求項２に係る発明によれば、乗客コンベアの稼働時、電流検出手段により電動機に供給される電流を検出し電流検出値を出力するとともに、負荷換算手段により電流検出値を乗客コンベアの負荷量に換算し負荷検出値を制動制御装置に出力する。制動制御装置は安全装置による異常検出時に負荷検出値に基づきあらかじめ定めた停止距離となるよう点弧信号を出力し踏段を停止させる。
【０００９】
さらに、本発明の請求項３記載に係る発明は、前記負荷検出装置は、前記電動機の回転数を検出し回転数検出値を出力する回転数検出手段と、前記回転数検出値を乗客コンベアの負荷量に換算して前記負荷検出値を出力する負荷換算手段とから成る構成にしてある。
【００１０】
前記のように構成した本発明の請求項３に係る発明によれば、乗客コンベアの稼働時、回転数検出手段により電動機の回転数を検出し回転数検出値を出力するとともに、負荷換算手段により回転数検出値を乗客コンベアの負荷量に換算し負荷検出値を制動制御装置に出力する。制動制御装置は安全装置による異常検出時に負荷検出値に基づきあらかじめ定めた停止距離となるよう点弧信号を出力し踏段を停止させる。
【００１１】
さらにまた、本発明の請求項４記載に係る発明は、前記直流電源装置は、交流電源の交流電圧を直流電圧に整流する整流子と、この整流子から供給される直流電圧をパルス幅変調により可変電圧出力する自己消弧素子から成る構成にしてある。
【００１２】
前記のように構成した本発明の請求項４に係る発明によれば、制動制御装置からの点弧信号を入力した直流電源装置は、整流子によって交流電源の交流電圧を直流電圧に整流するとともに、自己消弧素子によって直流電圧をパルス幅変調により可変電圧出力し、この直流電力を電動機の少なくとも１つの巻線に供給する。これにより電動機は制動トルクを発生させ踏段を減速し停止させる。
【００１３】
【発明の実施の形態】
以下、本発明の乗客コンベアの実施の形態を図に基づいて説明する。
【００１４】
図１は本発明の乗客コンベアの一実施形態を示す構成図、図２は図１の乗客コンベアに備えられる負荷検出装置の構成図である。
【００１５】
本実施形態の乗客コンベアは図１に示すように、三相交流電源１と、この三相交流電源１の断続を行う接触子２と、この接触子２を介して三相交流電源１から電力の供給を受け、駆動力を付与可能な誘導電動機３と、この誘導電動機３の軸に減速力を付与可能な減速機４と、誘導電動機３と連結されたスプロケット５ａおよびこのスプロケット５ａに巻き掛けられたチェーン５ｂを介して移動可能な無端状に連結された踏段５と、誘導電動機３に制動力を付与し踏段５の移動を停止させる制動装置６と、乗客コンベアの異常を検出して検出信号Ｓｓを出力する安全装置７と、検出信号Ｓｓに応じて接触子２を開路し制動装置６を動作させて踏段５の移動を停止させる乗客コンベア制御装置８と、三相交流電源１の交流電力を可変電圧の直流電力に変換し、この直流電力を三相電動機１の巻線に供給する直流電源装置９と、乗客コンベアの負荷を検出し負荷検出値ＳＩを出力する負荷検出装置１０と、負荷検出値ＳＩに基づきあらかじめ定めた停止距離となるよう点弧信号Ｓｇを直流電源装置９に出力する制動制御装置１１とを備えている。
【００１６】
また、前述した直流電源装置９は、三相交流電源１の交流電圧を直流電圧に整流する整流子９ａと、この整流子９ａから供給される直流電圧をパルス幅変調により可変電圧出力する自己消弧素子９ｂから成っている。さらに、前述した負荷検出装置１０は図２に示すように、誘導電動機３に供給される電流を検出し電流検出値Ｓｉを出力する電流検出手段１０ａと、電流検出値を乗客コンベアの負荷量に換算して負荷検出値ＳＩを出力する負荷換算手段１０ｂとから成っている。
【００１７】
この実施形態にあっては、乗客コンベアの稼働時、乗客コンベア制御装置８により接触子２が閉路され三相交流電源１の交流電力が誘導電動機３に供給されスプロケット５ａおよびチェーン５ｂを介して踏段５を移動している。この乗客コンベアの稼働時、負荷検出手段１０は電流検出手段１０ａによって誘導電動機３に供給される電流を検出し電流検出値を出力するとともに、負荷換算手段１０ｂによって電流検出値を乗客コンベアの負荷量に換算して負荷検出値ＳＩを制動制御装置１１に出力している。
【００１８】
ここで例えば乗客の靴が機器に挟まり安全装置７が異常を検出すると検出信号Ｓｓを乗客コンベア制御装置８および制動制御装置１１に出力する。乗客コンベア制御装置８は検出信号に応じ接触子２を開路して三相交流電源１から誘導電動機３への電力供給を遮断するとともに、乗客コンベア制御装置８と制動装置６間に介設され、踏段５の減速停止に要する時間に応じて制動装置６を作動させる図示しない時限回路を閉路する。また、制動制御装置１１は検出信号に応じ負荷検出装置１０から出力された負荷検出値ＳＩに基づきあらかじめ定めた停止距離となる制動トルクを誘導電動機３が発生可能な直流電圧を演算するとともに、この直流電圧に応じた点弧信号Ｓｇを直流電源装置９に出力する。直流電源装置９は点弧信号Ｓｇに応じて整流子９ａおよび自己消弧素子９ｂを介して三相交流電源１の交流電力を可変電圧の直流電力に変換し、この直流電力を誘導電動機３の巻線に供給する。これに応じて誘導電動機３は所定の制動トルクを発生させ踏段５を減速する。次いで、前述した時限回路により所定時間の経過を計測したとき制動装置６を作動させ踏段５を停止状態とする。
【００１９】
このように構成した実施形態では、負荷検出値ＳＩに基づきあらかじめ定めた停止距離となるよう誘導電動機３の制動トルクが制御され、乗客が多く負荷が大きな時は大きな制動トルクを発生させ、一方、乗客が少なく負荷が小さいときは小さな制動トルクを発生させることにより、負荷の大きさに関わらず一定の減速度で踏段５を停止させることができ、したがって、安全装置７の動作時に適切な減速度で、かつ規定の停止距離内で確実に踏段５を停止させることができる。これによって、安全装置７の動作による踏段５の非常停止時に乗客に不快感を与えることを防ぐことができるとともに、乗客の転倒を防止して安全性の向上を図ることができる。
【００２０】
図３は本発明の乗客コンベアの他の実施形態を示す負荷検出装置の構成図である。
【００２１】
前述した実施形態では負荷検出装置１０は図２に示すように電流検出手段１０ａおよび負荷換算手段１０ｂから構成したが、本発明はこれに限らず図３に示すように、負荷検出装置２０を、誘導電動機３の回転数を検出し回転数検出値を出力する回転数検出手段２０ａと、回転数検出値を乗客コンベアの負荷量に換算して負荷検出値ＳＩを出力する負荷換算手段２０ｂとから構成しても同様の効果を得ることができる。
【００２２】
【発明の効果】
本発明は以上のように構成したので、負荷検出値に基づきあらかじめ定めた停止距離となるよう電動機の制動トルクを制御し、負荷の大きさに関わらず一定の減速度で踏段を停止させることにより、安全装置の動作時に適切な減速度で、かつ規定の停止距離内で確実に踏段を停止させることができる。したがって、安全装置の動作による踏段の非常停止時に乗客に不快感を与えることを防ぐことができるとともに、乗客の転倒を防止して安全性の向上を図ることができる。
【図面の簡単な説明】
【図１】本発明の乗客コンベアの一実施形態を示す構成図である。
【図２】図１の乗客コンベアに備えられる負荷検出装置の構成図である。
【図３】本発明の乗客コンベアの他の実施形態を示す負荷検出装置の構成図である。
【符号の説明】
１　三相交流電源
２　接触子
３　誘導電動機
４　減速機
５　踏段
６　制動装置
７　安全装置
８　乗客コンベア制御装置
９　直流電源装置
９ａ　整流子
９ｂ　自己消弧素子
１０、２０　負荷検出装置
１０ａ　電流検出手段
１０ｂ、２０ｂ　負荷換算手段
１１　制動制御装置
２０ａ　回転数検出手段[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a passenger conveyor such as an escalator and a walking sidewalk, and more particularly to a passenger conveyor suitable for controlling stopping of steps according to operation of a safety device.
[0002]
[Prior art]
In general, passenger conveyors such as escalators and walking sidewalks are provided with various safety devices for detecting passengers being caught by equipment, overload of electric motors, etc., and braking devices in accordance with the operation of these safety devices. Thus, the driving device is braked with a constant braking force, and the steps are emergency stopped. The braking distance of the passenger conveyor at this time is determined by the Building Standards Law, etc. so that the steps can be stopped at the specified stopping distance even when the passenger conveyor is fully loaded, with a constant braking force set in advance to satisfy this. It was to brake.
[0003]
[Problems to be solved by the invention]
By the way, in the conventional passenger conveyor described above, braking is performed with a constant braking force so that the steps can be stopped at the specified stopping distance even when the passenger conveyor is fully loaded. The speed increased, which caused discomfort to passengers, and depending on the posture of the passengers, there was a risk of causing a fall accident.
[0004]
The present invention has been made in view of such circumstances in the prior art, and has as its object to provide a passenger who can stop a step at an appropriate deceleration when a safety device operates and within a specified stopping distance. To provide a conveyor.
[0005]
[Means for Solving the Problems]
To achieve this object, the invention according to claim 1 of the present invention provides an AC power supply, a contact for intermittently connecting the AC power supply, and a supply of power from the AC power supply via the contact, A drive device having an electric motor capable of applying a driving force and a speed reducer capable of applying a deceleration force, a sprocket connected to the drive device, and an endless connection movable via a chain wound around the sprocket. The step, the braking device that applies a braking force to the electric motor to stop the movement of the step, a safety device that detects an abnormality in the passenger conveyor and outputs a detection signal, and the contactor according to the detection signal. In a passenger conveyor having a passenger conveyor control device for opening the circuit and operating the braking device to stop the movement of the steps, converting the AC power of the AC power supply into DC power of a variable voltage, A DC power supply that supplies DC power to at least one winding of the electric motor, a load detection device that detects a load on the passenger conveyor and outputs a load detection value, and a predetermined stopping distance based on the load detection value. And a braking control device for outputting a firing signal to the DC power supply device.
[0006]
According to the first aspect of the present invention configured as described above, the safety device that detects the abnormality of the passenger conveyor outputs a detection signal to the passenger conveyor control device and the braking control device. The passenger conveyor control device opens the contact according to the detection signal and cuts off the power supply from the AC power supply to the electric motor, and the braking control device determines a predetermined value based on the load detection value output from the load detection device according to the detection signal. An ignition signal is output to the DC power supply so as to reach the stopping distance. Then, the DC power supply device converts the AC power of the AC power supply into DC power of a variable voltage, supplies this DC power to at least one winding of the motor, and in response to this, the motor generates a braking torque and steps. Decelerate and stop. In this way, the braking torque of the electric motor is controlled so as to have a predetermined stopping distance based on the load detection value, and a large braking torque is generated when the number of passengers is large and the load is small. By generating the braking torque, the steps can be stopped at a constant deceleration regardless of the magnitude of the load, and therefore, it is ensured that the safety device operates at an appropriate deceleration and within the specified stopping distance. The steps can be stopped.
[0007]
In the invention according to claim 2 of the present invention, the load detecting device detects a current supplied to the electric motor and outputs a detected current value, and outputs the detected current value to a load of a passenger conveyor. Load conversion means for converting the quantity into a load and outputting the load detection value.
[0008]
According to the invention according to claim 2 of the present invention configured as described above, when the passenger conveyor operates, the current supplied to the electric motor is detected by the current detection unit, and a current detection value is output. The detected current value is converted to the load amount of the passenger conveyor, and the detected load value is output to the braking control device. When an abnormality is detected by the safety device, the brake control device outputs an ignition signal so as to have a predetermined stopping distance based on the load detection value and stops the step.
[0009]
Further, in the invention according to claim 3 of the present invention, the load detection device detects a rotation speed of the electric motor and outputs a rotation speed detection value, and a rotation speed detection unit outputs the rotation speed detection value to a passenger conveyor. Load conversion means for converting the load into a load amount and outputting the load detection value.
[0010]
According to the invention according to claim 3 of the present invention configured as described above, when the passenger conveyor is operating, the rotation speed detection means detects the rotation speed of the electric motor and outputs the rotation speed detection value, and the load conversion means The detected number of revolutions is converted into the load amount of the passenger conveyor, and the detected load value is output to the braking control device. When an abnormality is detected by the safety device, the brake control device outputs an ignition signal so as to have a predetermined stopping distance based on the load detection value and stops the step.
[0011]
Still further, in the invention according to claim 4 of the present invention, the DC power supply device further comprises a rectifier for rectifying an AC voltage of the AC power supply into a DC voltage, and a DC voltage supplied from the rectifier by pulse width modulation. It is configured with a self-extinguishing element that outputs a variable voltage.
[0012]
According to the invention according to claim 4 of the present invention configured as described above, the DC power supply device that receives the ignition signal from the braking control device rectifies the AC voltage of the AC power supply to a DC voltage by using a commutator. The DC voltage is output as a variable voltage by pulse width modulation by the self-extinguishing element, and this DC power is supplied to at least one winding of the electric motor. As a result, the motor generates a braking torque to decelerate and stop the steps.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of a passenger conveyor of the present invention will be described with reference to the drawings.
[0014]
FIG. 1 is a configuration diagram showing an embodiment of a passenger conveyor of the present invention, and FIG. 2 is a configuration diagram of a load detection device provided in the passenger conveyor of FIG.
[0015]
As shown in FIG. 1, the passenger conveyor according to the present embodiment includes a three-phase AC power supply 1, a contact 2 for intermittently connecting the three-phase AC power supply 1, and power from the three-phase AC power supply 1 through the contact 2. , An induction motor 3 capable of applying a driving force, a speed reducer 4 capable of applying a deceleration force to a shaft of the induction motor 3, a sprocket 5a connected to the induction motor 3, and a sprocket 5a wound around the sprocket 5a. Endlessly connected steps 5 movable via a chain 5b, a braking device 6 for applying a braking force to the induction motor 3 to stop the movement of the steps 5, and detecting and detecting an abnormality of the passenger conveyor. A safety device 7 that outputs a signal Ss, a passenger conveyor control device 8 that opens the contact 2 according to the detection signal Ss to operate the braking device 6 to stop the movement of the step 5, and an AC of the three-phase AC power supply 1. Variable power DC voltage And a DC power supply 9 for supplying this DC power to the windings of the three-phase motor 1, a load detection device 10 for detecting the load on the passenger conveyor and outputting a load detection value SI, and a load detection value SI. A braking control device 11 that outputs a firing signal Sg to the DC power supply device 9 so as to have a predetermined stopping distance is provided.
[0016]
The DC power supply 9 described above includes a rectifier 9a that rectifies the AC voltage of the three-phase AC power supply 1 into a DC voltage, and a self-consumption device that outputs a DC voltage supplied from the rectifier 9a as a variable voltage by pulse width modulation. It consists of an arc element 9b. Further, as shown in FIG. 2, the load detection device 10 described above detects a current supplied to the induction motor 3 and outputs a current detection value Si, and converts the current detection value to a load amount of the passenger conveyor. And a load converting means 10b for converting and outputting the detected load value SI.
[0017]
In this embodiment, when the passenger conveyor is operating, the contact 2 is closed by the passenger conveyor control device 8, the AC power of the three-phase AC power supply 1 is supplied to the induction motor 3, and the step is carried out via the sprocket 5a and the chain 5b. 5 is moving. When the passenger conveyor is in operation, the load detecting means 10 detects the current supplied to the induction motor 3 by the current detecting means 10a and outputs a detected current value, and outputs the detected current value by the load converting means 10b to the load amount of the passenger conveyor. And outputs the load detection value SI to the braking control device 11.
[0018]
Here, for example, when the passenger's shoes are caught in the equipment and the safety device 7 detects an abnormality, the detection signal Ss is output to the passenger conveyor control device 8 and the brake control device 11. The passenger conveyor control device 8 opens the contact 2 in response to the detection signal to cut off the power supply from the three-phase AC power supply 1 to the induction motor 3, and is interposed between the passenger conveyor control device 8 and the braking device 6, A time circuit (not shown) for operating the braking device 6 according to the time required for the deceleration stop of the step 5 is closed. In addition, the braking control device 11 calculates a DC voltage at which the induction motor 3 can generate a braking torque having a predetermined stopping distance based on the load detection value SI output from the load detection device 10 in response to the detection signal. The ignition signal Sg corresponding to the DC voltage is output to the DC power supply 9. The DC power supply 9 converts the AC power of the three-phase AC power supply 1 into a variable voltage DC power via the commutator 9a and the self-extinguishing element 9b according to the ignition signal Sg, and converts the DC power to the induction motor 3 Supply to the winding. In response to this, the induction motor 3 generates a predetermined braking torque to decelerate the steps 5. Next, when the elapse of a predetermined time is measured by the above-described timed circuit, the braking device 6 is operated to bring the step 5 into a stopped state.
[0019]
In the embodiment configured as described above, the braking torque of the induction motor 3 is controlled so as to have a predetermined stopping distance based on the load detection value SI, and when the number of passengers is large and the load is large, a large braking torque is generated. By generating a small braking torque when the number of passengers is small and the load is small, the step 5 can be stopped at a constant deceleration regardless of the magnitude of the load, and therefore, an appropriate deceleration can be achieved when the safety device 7 operates. Thus, the steps 5 can be reliably stopped within the prescribed stopping distance. Thus, it is possible to prevent a passenger from feeling uncomfortable at the time of emergency stop of the step 5 due to the operation of the safety device 7, and to prevent the passenger from falling over, thereby improving safety.
[0020]
FIG. 3 is a configuration diagram of a load detection device showing another embodiment of the passenger conveyor of the present invention.
[0021]
In the above-described embodiment, the load detection device 10 includes the current detection unit 10a and the load conversion unit 10b as shown in FIG. 2, but the present invention is not limited to this, and as shown in FIG. A rotation speed detecting means 20a for detecting a rotation speed of the induction motor 3 and outputting a rotation speed detection value, and a load conversion means 20b for converting the rotation speed detection value into a load amount of a passenger conveyor and outputting a load detection value SI. The same effect can be obtained even if it is configured.
[0022]
【The invention's effect】
Since the present invention is configured as described above, the braking torque of the electric motor is controlled so as to have a predetermined stopping distance based on the load detection value, and the step is stopped at a constant deceleration regardless of the size of the load. In addition, the step can be reliably stopped at an appropriate deceleration when the safety device operates and within a specified stopping distance. Therefore, it is possible to prevent the passengers from feeling uncomfortable when the steps are stopped in an emergency due to the operation of the safety device, and to prevent the passengers from overturning to improve safety.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing one embodiment of a passenger conveyor of the present invention.
FIG. 2 is a configuration diagram of a load detection device provided in the passenger conveyor of FIG. 1;
FIG. 3 is a configuration diagram of a load detection device showing another embodiment of the passenger conveyor of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Three-phase alternating current power supply 2 Contact 3 Induction motor 4 Reduction gear 5 Step 6 Braking device 7 Safety device 8 Passenger conveyor control device 9 DC power supply 9a Commutator 9b Self-extinguishing element 10, 20 Load detecting device 10a Current detecting means 10b , 20b Load conversion means 11 Brake control device 20a Revolution detection means

Claims

交流電源と、この交流電源の断続を行う接触子と、この接触子を介して前記交流電源から電力の供給を受け、駆動力を付与可能な電動機および減速力を付与可能な減速機を備えた駆動装置と、この駆動装置と連結されたスプロケットおよびこのスプロケットに巻き掛けられたチェーンを介して移動可能な無端状に連結された踏段と、前記電動機に制動力を付与し踏段の移動を停止させる制動装置と、乗客コンベアの異常を検出して検出信号を出力する安全装置と、前記検出信号に応じて前記接触子を開路し前記制動装置を動作させて前記踏段の移動を停止させる乗客コンベア制御装置とを有する乗客コンベアにおいて、
前記交流電源の交流電力を可変電圧の直流電力に変換し、この直流電力を前記電動機の少なくとも１つの巻線に供給する直流電源装置と、乗客コンベアの負荷を検出し負荷検出値を出力する負荷検出装置と、前記負荷検出値に基づきあらかじめ定めた停止距離となるよう点弧信号を前記直流電源装置に出力する制動制御装置とを備えたことを特徴とする乗客コンベア。An AC power source, a contact for intermittently connecting the AC power source, a motor capable of receiving a supply of power from the AC power source via the contact and providing a driving force and a decelerator capable of providing a deceleration force. A driving device, a sprocket connected to the driving device, and an endlessly connected step movable via a chain wound around the sprocket; and applying a braking force to the electric motor to stop the movement of the step. A braking device, a safety device that detects a malfunction of the passenger conveyor and outputs a detection signal, and a passenger conveyor control that opens the contact according to the detection signal and operates the braking device to stop the movement of the step. A passenger conveyor having a device and
A DC power supply that converts AC power of the AC power supply into DC power of a variable voltage and supplies the DC power to at least one winding of the electric motor; and a load that detects a load on a passenger conveyor and outputs a load detection value. A passenger conveyor comprising: a detection device; and a braking control device that outputs a firing signal to the DC power supply device so as to have a predetermined stopping distance based on the load detection value.

前記負荷検出装置は、前記電動機に供給される電流を検出し電流検出値を出力する電流検出手段と、前記電流検出値を乗客コンベアの負荷量に換算して前記負荷検出値を出力する負荷換算手段とから成ることを特徴とする請求項１記載の乗客コンベア。The load detection device includes a current detection unit that detects a current supplied to the electric motor and outputs a current detection value, and a load conversion unit that converts the current detection value into a load amount of a passenger conveyor and outputs the load detection value. 2. A passenger conveyor according to claim 1, comprising means.

前記負荷検出装置は、前記電動機の回転数を検出し回転数検出値を出力する回転数検出手段と、前記回転数検出値を乗客コンベアの負荷量に換算して前記負荷検出値を出力する負荷換算手段とから成ることを特徴とする請求項１記載の乗客コンベア。The load detection device detects a rotation speed of the electric motor, and outputs a rotation speed detection value. The passenger conveyor according to claim 1, further comprising a conversion means.

前記直流電源装置は、交流電源の交流電圧を直流電圧に整流する整流子と、この整流子から供給される直流電圧をパルス幅変調により可変電圧出力する自己消弧素子から成ることを特徴とする請求項１記載の乗客コンベア。The DC power supply device includes a rectifier that rectifies an AC voltage of an AC power supply into a DC voltage, and a self-extinguishing element that outputs a DC voltage supplied from the rectifier as a variable voltage by pulse width modulation. The passenger conveyor according to claim 1.