Patent application number | Description | Published |
20080315802 | Elevator Control Device - An elevator control device that drives a cage in a high-efficient speed pattern without using a load detector such as a conventional scale device. The elevator control device includes: a current detector for detecting a current that is supplied to a motor from an inverter; a speed detector for detecting a rotation speed of the motor; a speed pattern generator for generating an elevator speed pattern a motor speed control device for controlling the speed so that a speed detection value follows a speed command value of the speed pattern; and a motor current control device for controlling a current that is supplied to the motor with respect to the inverter by using a current detection value and the speed detection value on the basis of the speed command value. The motor current control device has a duty detector for detecting a duty that is a ratio of an on-time of the inverter within a given sampling period, and the speed pattern generator changes the speed pattern of the motor based on a duty detection value detected by the duty detector. | 12-25-2008 |
20090045016 | ELEVATOR OPERATION CONTROL DEVICE - In an elevator operation control device, a plurality of operation control profiles for prescribing values regarding operation of an elevator, for example, a speed of a car are registered in an operation control device body. The operation control device body collects values such as the activation frequency of the car and the like as information on a condition of use of the elevator. The operation control device body also selects one of the operation control profiles in accordance with the information on the condition of use, and controls the operation of the elevator based on the selected operation control profile. | 02-19-2009 |
20090101450 | Elevator apparatus that detects an accurate running speed of an elevator car that operates over speed - In an elevator apparatus, a car ascends and descends based on a running speed pattern generated by a control panel. Destination floor buttons and landing buttons are connected to an over speed monitoring portion without the intervention of the control panel. The over speed monitoring portion has an over speed setting portion for setting first and second over speeds based on car position information obtained from a car position detector and call registration information obtained from the destination floor buttons and the landing buttons. In the over speed setting portion, a running speed pattern different from the running speed pattern generated by the control panel is independently generated without depending on information from the control panel. The first and second over speeds are set based on the running speed pattern generated by the over speed setting portion. | 04-23-2009 |
20090108987 | SLIDING DOOR APPARATUS AND ELEVATOR - In a sliding door apparatus, a first entrance is opened and closed by a first door, and a second entrance that faces the first entrance is opened and closed by a second door. Imaging means that captures images across a space between the first entrance and the second entrance is disposed beside the space. An image processing and determining portion determines presence or absence of an obstruction inside the space based on image data from the imaging means. | 04-30-2009 |
20090133964 | Elevator Apparatus - In an elevator apparatus, a brake control device has a first brake control portion, a second brake control portion, and a third brake control portion. The first brake control portion operates a hoisting machine brake to stop a ascending/descending body as an emergency measure when an abnormality is detected. The second brake control portion reduces a braking force of the hoisting machine brake when a deceleration of the ascending/descending body becomes equal to or higher than a predetermined value during an emergency braking operation of the hoisting machine brake. The third brake control portion monitors a slip speed of a main rope with respect to a drive sheave during emergency braking operation of the hoisting machine brake, and reduces a braking force of the hoisting machine brake when the slip speed of the main rope becomes equal to or higher than a predetermined value. | 05-28-2009 |
20090145698 | ELEVATOR DEVICE - In an elevator apparatus, a brake device for braking the running of a car is controlled by a brake control device. The brake control device monitors a speed of the car and a degree of deceleration of the car at a time of emergency braking of the car. When the degree of deceleration of the car reaches a preset target deceleration, the brake control device generates a target speed pattern for decelerating the car from a speed of the car at that time. | 06-11-2009 |
20090229924 | ELEVATOR APPARATUS - In an elevator apparatus, a brake device is controlled by a brake control device. The brake control device is capable of performing braking force reduction control for reducing the braking force of the brake device at a time of emergency braking of a car. The brake control device monitors a running state of the car at the time of emergency braking thereof, and makes a switchover between validity and invalidity of braking force reduction control such that the car is stopped within a preset allowable stopping distance. | 09-17-2009 |
20090236184 | ELEVATOR APPARATUS - An elevator apparatus is equipped with an elevator component that is operated during operation of an elevator, a detector for measuring a change in a physical quantity other than temperature as to the elevator component, and a control device for controlling the operation of the elevator based on information from the detector. The elevator component is, for example, a hoisting machine for moving a car of the elevator. The hoisting machine has a motor, and a driving sheave that is rotated by the motor. The detector measures a strain of a frame of the motor as the physical quantity other than temperature. The control device determines based on the strain of the frame of the motor whether or not there is an abnormality in the operation of the elevator, and controls the operation of the elevator. It is therefore possible to determine easily and more reliably whether or not there is an abnormality in the operation of the elevator, without the need to directly measure the temperature of the motor ( | 09-24-2009 |
20090236185 | DOOR DEVICE FOR ELEVATOR - A door device for an elevator is provided with an elevator door for opening/closing a doorway through which an interior of a car communicates with a landing, a distance sensor for continuously detecting a distance from the doorway to a passenger at the landing, a processing device for obtaining a door control command corresponding to information from the distance sensor, and a door control device for controlling a movement of the elevator door based on the door control command from the processing device. Thus, the elevator door can be moved in accordance with the movement of the passenger. Accordingly, the passenger is allowed to board the car more reliably, and a running efficiency of the elevator can be enhanced. | 09-24-2009 |
20090255764 | ELEVATOR DEVICE - In an elevator apparatus, a brake control device has a first brake control portion for operating a brake device upon detection of an abnormality to stop a car as an emergency measure, and a second brake control portion for reducing a braking force of the brake device when a degree of deceleration of the car becomes equal to or higher than a predetermined value at a time of emergency braking operation of the first brake control portion. The second brake control portion detects emergency braking operation of the brake device independently of the first brake control portion. | 10-15-2009 |
20090266649 | EMERGENCY STOP SYSTEM FOR ELEVATOR - An emergency stop system for an elevator includes a state sensor for detecting an operation of a car, a brake device for braking the car, a brake controller for outputting a signal for operating the brake device based on a signal detected by the state sensor, and an uninterruptible power supply device for supplying electric power to the sensor, the brake device, and the controller. The controller has a signal processing/calculating unit for calculating the deceleration of the car based on the signal detected by the sensor, a command value calculating unit for calculating a command value for operating the brake device based on the deceleration of the car calculated by the processing/calculating unit, and a power monitoring device for monitoring state of the uninterruptible power supply device. At least one of the sensor, the processing/calculating unit, and the calculating unit includes independent systems. | 10-29-2009 |
20090283367 | Elevator apparatus - In an elevator apparatus, a single car is raised and lowered by a plurality of hoisting machines. An elevator control device for controlling the hoisting machines generates speed commands separately for the hoisting machines. When a current value of one of the hoisting machines reaches a current set value, which is set in advance during acceleration of the car, the elevator control device applies the speed command for that one of the hoisting machines, whose current value has reached the current set value, to the other hoisting machine as well. | 11-19-2009 |
20100018810 | ELEVATOR APPARATUS - In an elevator apparatus, a car and a counterweight are raised/lowered by hoisting machines. Each of those hoisting machines includes a drive sheave and a hoisting machine body, the hoisting machine body including an electric motor for rotating the drive sheave and a hoisting machine brake for braking rotation of the drive sheave. At least one of the car and the counterweight includes a raised/lowered body-mounted brake device for stopping the car as an emergency measure on a condition different from a condition set for a safety gear. | 01-28-2010 |
20100025162 | Elevator Apparatus - In an elevator apparatus, a brake device stops a car from running. The brake device has a brake control portion for controlling a braking force generated at a time of emergency braking to adjust a deceleration of the car, and a timer circuit for invalidating the control of the braking force performed by the brake control portion after a lapse of a predetermined time from a moment when an emergency braking command is generated. | 02-04-2010 |
20100032245 | Elevator Apparatus - In an elevator apparatus, a brake device is controlled by a brake control device. The brake control device has a first brake control portion for operating the brake device to stop a car as an emergency measure upon detection of an abnormality, and a second brake control portion for reducing a braking force of the brake device when a deceleration of the car becomes equal to or larger than a predetermined value during emergency braking operation of the first brake control portion. The second brake control portion controls the brake device independently of the first brake control portion. | 02-11-2010 |
20100044159 | ELEVATOR APPARATUS - In an elevator apparatus, a brake device stops a car from running. The brake device has a power shutoff portion for shutting off a supply of power to a brake opening coil in response to a brake actuation command, and a current adjusting portion for supplying the brake opening coil with power while adjusting an amount of current in response to a deceleration reduction command from a brake control portion. The current adjusting portion can supply the brake opening coil with power even when the supply of power to the brake opening coil is shut off by the power shutoff portion. | 02-25-2010 |
20100059318 | DOOR DEVICE FOR ELEVATOR - A car door is displaced with respect to a landing door between an engagement position at which the car door is engaged with the landing door and an open-away position located on a door-closing side with respect to the engagement position. While remaining engaged with the car door, the landing door is moved to open/close a landing doorway. When the landing doorway is fully closed by the landing door, a locking device performs an operation corresponding to the position of the car door with respect to the landing door to lock/unlock the landing door. A door control device has an engagement completion time calculating portion, a speed pattern generating portion, and a speed control portion. The engagement completion time calculating portion predicts an engagement completion time to a moment when the car door reaches the engagement position during a door-opening operation, based on information from an unlock detecting device for detecting whether or not the landing door has been unlocked. The speed pattern generating portion generates a speed pattern of the car door during the door-opening operation, based on information from the engagement completion time calculating portion. The speed control portion controls the speed of the car door according to the speed pattern. | 03-11-2010 |
20100101896 | ELEVATOR APPARATUS - Provided is an elevator apparatus including a first electromagnetic switch and a second electromagnetic switch provided between a first electromagnetic coil and a second electromagnetic coil of a first brake device and a second brake device and a power source. The brake control section includes: a first electromagnetic coil control switch provided between the first electromagnetic coil and a ground section; a second electromagnetic coil control switch provided between the second electromagnetic coil and the ground section; a first processing section for opening and closing the first electromagnetic switch and the first electromagnetic coil control switch in response to a braking operation command issued from an operation control section; and a second processing section for opening and closing the second electromagnetic switch and the second electromagnetic coil control switch in response to the braking operation command. | 04-29-2010 |
20100101897 | BRAKE DEVICE FOR ELEVATOR - In an elevator device, movement of a car is braked by a brake device in a state in which driving of a hoist is stopped. While the drive of the hoist is stopped, braking force of the brake device is controlled by a brake control device based on a signal from a movement detector that generates a signal corresponding to movement of the car. The brake control device generates a target pattern for at least one of speed and acceleration of the car and controls braking force of the brake device such that the movement of the car follows the target pattern. | 04-29-2010 |
20100155182 | ELEVATOR SYSTEM - An elevator system in which a controller monitors whether or not a speed of an ascending/descending body reaches a preset overspeed. At a time of maintenance work, a stopper is interposed between a buffer and the ascending/descending body to limit a lowered position of the ascending/descending body. Stopper detection means detects installation of the stopper onto at least one of the buffer and the ascending/descending body. When the stopper is detected by the stopper detection means, the controller lowers a set value of the overspeed. | 06-24-2010 |
20100155183 | ELEVATOR - An elevator apparatus performing proper braking control of a car according to a detected content of a failure, and including: a semiconductor switch connected in series to a brake coil, for varying current flowing through the brake coil; an interruption switch connected in series to the brake coil and the semiconductor switch and capable of interrupting current flowing through the brake coil; a braking force control processing mechanism controlling an amount of current flowing through the semiconductor switch according to deceleration of the car when the car stops; a failure detection section detecting failure in the braking force control processing mechanism; a critical event detection mechanism detecting a critical event requiring an urgent stop of the car based on a state detection signal; and a brake power supply interrupting mechanism turning the interruption switch OFF to apply braking when the failure and the critical event is detected. | 06-24-2010 |
20100170751 | ELEVATOR APPARATUS - In an elevator apparatus, a rescue operation for a car is performed by a rescue operation controller. The rescue operation controller obtains a rescue operation voltage value and applies a voltage having the rescue operation voltage value to a brake coil in response to a signal from a speed detector at a time of the rescue operation for the car. The rescue operation voltage value is a value of the voltage necessary to reduce braking force of a brake device to move the car by using a state of imbalance between the car and a counterweight. | 07-08-2010 |
20100219814 | MAGNETIC POSITION SENSOR - In a magnetic position sensor, first and second detecting cores are disposed so as to line up with each other on opposite sides of a detecting gap. A magnet unit is displaced relative to the first and second detecting cores together with displacement of a measured object. The magnet unit has: first and second magnet cores that are disposed so as to line up with each other on opposite sides of an origin gap; and a magnet that generates two magnetic flux loops between the first and second detecting cores and the first and second magnet cores, the magnetic flux loops having a boundary at the origin gap. | 09-02-2010 |
20100282545 | ELEVATOR DEVICE - In an elevator device, a car is raised and lowered by a plurality of hoisting machines respectively including hoisting machine brakes. Each of the hoisting machine brakes has a braking force large enough to stop the car by itself. Each of a plurality of brake control sections respectively for controlling the corresponding hoisting machine brakes includes a plurality of calculation sections. The calculation sections can detect a failure of the calculation sections by comparing own results of calculations and cause a corresponding one of the hoisting machine brakes to perform a braking operation upon detection of the failure of the calculation sections. | 11-11-2010 |
20110036667 | ELEVATOR APPARATUS AND OPERATING METHOD THEREOF - An elevator apparatus includes a safety circuit section including a plurality of abnormality detection means, a safety control device, failure detection means, and circuit changeover means. The safety control device controls electric power supply to a driving device and a brake device in accordance with a content of an abnormality detected by the abnormality detection means. The failure detection means detects a failure of the safety control device. When the failure of the safety control device is detected, the circuit changeover means forms a failure-time circuit in which the electric power supply to the driving device and the brake device is interrupted directly by the abnormality detection means. | 02-17-2011 |
20120006628 | ELEVATOR SYSTEM - An elevator system in which a controller monitors whether or not a speed of an ascending/descending body reaches a preset overspeed. At a time of maintenance work, a stopper is interposed between a buffer and the ascending/descending body to limit a lowered position of the ascending/descending body. Stopper detection means detects installation of the stopper onto at least one of the buffer and the ascending/descending body. When the stopper is detected by the stopper detection means, the controller lowers a set value of the overspeed. | 01-12-2012 |
20120006631 | ELEVATOR SYSTEM - An elevator system in which a controller monitors whether or not a speed of an ascending/descending body reaches a preset overspeed. At a time of maintenance work, a stopper is interposed between a buffer and the ascending/descending body to limit a lowered position of the ascending/descending body. Stopper detection means detects installation of the stopper onto at least one of the buffer and the ascending/descending body. When the stopper is detected by the stopper detection means, the controller lowers a set value of the overspeed. | 01-12-2012 |