CONTROL DEVICE FOR HYDRAULIC ELEVATOR

PROBLEM TO BE SOLVED: To correct a landing error due to the entrance and exit of passengers after landing or oil leaks with high accuracy, and prolong the working life of a device for correcting the landing error. SOLUTION: In a control device for hydraulic elevators, when there is a landing error w...

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Bibliographische Detailangaben
Hauptverfasser:	MATSUDO TAKASHI, ARAHORI NOBORU
Format:	Patent
Sprache:	eng
Schlagworte:	ELEVATORS ESCALATORS OR MOVING WALKWAYS HAULING HOISTING LIFTING PERFORMING OPERATIONS TRANSPORTING
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To correct a landing error due to the entrance and exit of passengers after landing or oil leaks with high accuracy, and prolong the working life of a device for correcting the landing error. SOLUTION: In a control device for hydraulic elevators, when there is a landing error within a specified value when the door is open, the control device 10 performs control through a second control valve 20 so that pressurized oil is supplied froma pressure accumulator 21 to a hydraulic cylinder 3, or the pressurized oil is discharged from the hydraulic cylinder 3 to a pressure-oil tank 12. When there is a landing error when the door is closed, the control device performs control through a first control valve 4 by a first pump 5 so that the pressurized oil is supplied from the pressure-oil tank 12 to the hydraulic cylinder 3, or the pressurized oil is discharged from the hydraulic cylinder 3 to the pressure-oil tank 12 by the first pump 5.