Abstract: In an elevator apparatus, an abnormal acceleration detecting mechanism includes a mass body that operates in connection with movement of the car, the abnormal acceleration detecting mechanism operating a safety device using a force of inertia that is generated by the mass body if an acceleration that exceeds a predetermined set value arises in a car. A breakage detecting means detects breakage of a suspending means that suspends the car. A resistance force applying apparatus applies a resistance force to a mechanism for activating the safety device such that the resistance force is applied when breakage of the suspending means is not detected by the breakage detecting means and the resistance force is reduced if breakage of the suspending means is detected by the breakage detecting means.

Abstract: In an elevator apparatus, a car is suspended by a suspending device. A braking apparatus applies a braking force to the car by the suspending device. An excessive speed detection level that changes in response to car position is set in an excessive speed monitoring portion. The excessive speed monitoring portion makes the braking apparatus perform a braking operation when car speed reaches the excessive speed detection level. An anomalous acceleration detecting mechanism operates a safety device if acceleration that exceeds a preset set value arises in the car.

Abstract: In an elevator apparatus, a car is suspended by a suspending means. The car is raised and lowered by a driving apparatus by means of the suspending means. The car is braked by a braking apparatus. An abnormal acceleration detecting mechanism operates the braking apparatus to stop the car if acceleration that exceeds a preset set value arises in the car.

Abstract: In an elevator apparatus, an abnormal acceleration detecting mechanism includes a mass body that operates in connection with movement of the car, the abnormal acceleration detecting mechanism operating a safety device using a force of inertia that is generated by the mass body if an acceleration that exceeds a predetermined set value arises in a car. A breakage detecting means detects breakage of a suspending means that suspends the car. A resistance force applying apparatus applies a resistance force to a mechanism for activating the safety device such that the resistance force is applied when breakage of the suspending means is not detected by the breakage detecting means and the resistance force is reduced if breakage of the suspending means is detected by the breakage detecting means.

Abstract: In an elevator apparatus, a car is suspended by a suspending means. A braking apparatus applies a braking force to the car by means of the suspending means. An excessive speed detection level that changes in response to car position is set in an excessive speed monitoring portion. The excessive speed monitoring portion makes the braking apparatus perform a braking operation when car speed reaches the excessive speed detection level. An anomalous acceleration detecting mechanism operates a safety device if acceleration that exceeds a preset set value arises in the car.

Abstract: In an elevator apparatus, a car is suspended by a suspending means. The car is raised and lowered by a driving apparatus by means of the suspending means. The car is braked by a braking apparatus. An abnormal acceleration detecting mechanism operates the braking apparatus to stop the car if acceleration that exceeds a preset set value arises in the car.

Abstract: A speed governor includes: a centrifugal weight that revolves around a predetermined revolving shaft in response to movement of a car; an extensible body to which the centrifugal weight is connected, and that is rotated around the revolving shaft, the extensible body being displaced relative to the revolving shaft in response to a centrifugal force to which the centrifugal weight is subjected due to the revolution; a switching apparatus that extends and retracts the extensible body in response to an elevator operational state; and an operation detecting apparatus that detects whether a state of the extensible body is an extended state in which the extensible body is extended or a retracted state in which the extensible body is retracted. A controlling apparatus determines presence or absence of an abnormality in the speed governor by comparing the elevator operational state and detection results from the operation detecting apparatus.

Abstract: In a speed governor for an elevator, a clutch mechanism is provided between a governor sheave and a rotary body. An actuator performs switching between transmission and interruption of rotation by the clutch mechanism according to whether or not energization from a DC generator, which generates a current by rotation of the governor sheave, is performed. A rectifier circuit allows the current to flow from the DC generator to the actuator only when a rotating direction of the governor sheave is a predetermined one of a first direction and a second direction.

Abstract: An elevator governor capable of setting first overspeeds different between a rising time and a descending time by a simple configuration and at a low cost without the need for electric power supply from the outside. For this purpose, a weight that is moved in a predetermined direction by receiving a centrifugal force according to a travel speed at the rising time and the descending time of a car, an elastic body urged by movement of the weight having received the centrifugal force, and an actuating device actuates a stop switch when the weight having received the centrifugal force moves to a predetermined position against an urging force of the elastic body are provided, and also a switching device driven by the rising/descending operation of the car is provided. By the switching device, the length of the elastic body at the time when the actuating devices actuates the stop switch is switched to a length different according to the rising/descending direction of the car.

Abstract: In a speed governor for an elevator, a clutch mechanism is provided between a governor sheave and a rotary body. An actuator performs switching between transmission and interruption of rotation by the clutch mechanism according to whether or not energization from a DC generator, which generates a current by rotation of the governor sheave, is performed. A rectifier circuit allows the current to flow from the DC generator to the actuator only when a rotating direction of the governor sheave is a predetermined one of a first direction and a second direction.

Abstract: In an emergency stop system for an elevator, a governor sheave that moves in synchronism with the raising and lowering of a car is wound around a governor sheave. The car is mounted with a safety device for braking the car through displacement of the car, which is connected to the governor rope, with respect to the governor rope. A control device outputs an activation signal upon detecting an abnormality in the speed of the car. A rope catching device is provided in the vicinity of the governor sheave. The rope catching device has an electromagnetic actuator that is activated upon input of the activation signal, and a restraining portion for restraining the governor rope upon the activation of the electromagnetic actuator.

Abstract: An elevator governor capable of setting first overspeeds different between a rising time and a descending time by a simple configuration and at a low cost without the need for electric power supply from the outside. For this purpose, a weight that is moved in a predetermined direction by receiving a centrifugal force according to a travel speed at the rising time and the descending time of a car, an elastic body urged by movement of the weight having received the centrifugal force, and an actuating device actuates a stop switch when the weight having received the centrifugal force moves to a predetermined position against an urging force of the elastic body are provided, and also a switching device driven by the rising/descending operation of the car is provided. By the switching device, the length of the elastic body at the time when the actuating devices actuates the stop switch is switched to a length different according to the rising/descending direction of the car.

Abstract: In an emergency stop system for an elevator, a governor sheave that moves in synchronism with the raising and lowering of a car is wound around a governor sheave. The car is mounted with a safety device for braking the car through displacement of the car, which is connected to the governor rope, with respect to the governor rope. A control device outputs an activation signal upon detecting an abnormality in the speed of the car. A rope catching device is provided in the vicinity of the governor sheave. The rope catching device has an electromagnetic actuator that is activated upon input of the activation signal, and a restraining portion for restraining the governor rope upon the activation of the electromagnetic actuator.

Abstract: An elevator apparatus has a criterion (overspeed levels) that changes in accordance with an operational condition of a car. The elevator apparatus also has a position information correcting means that corrects an error in value that determines the criterion. In the elevator apparatus, the overspeed levels are determined using continuous information corresponding to car position, while the continuous information is corrected using intermittent information corresponding to actual car position. According to the elevator apparatus, on-the-spot adjustment or long-time maintenance becomes unnecessary, and overspeed detection levels can easily be changed in accordance with the operation conditions of the car.

Abstract: An elevator apparatus has a criterion (overspeed levels) that changes in accordance with an operational condition of a car. The elevator apparatus also has a position information correcting means that corrects an error in value that determines the criterion. In the elevator apparatus, the overspeed levels are determined using continuous information corresponding to car position, while the continuous information is corrected using intermittent information corresponding to actual car position. According to the elevator apparatus, on-the-spot adjustment or long-time maintenance becomes unnecessary, and overspeed detection levels can easily be changed in accordance with the operation conditions of the car.

Abstract: An elevator system and a speed governor detecting first over-speeds of different values set for different moving directions of an elevator car. The speed governor includes a fly weight speed governing mechanism on a sheave on which a speed governing rope is wound and operates in both ascending and descending modes of the elevator car, and a fly ball speed governing mechanism coupled with a horizontal shaft of the sheave via a clutch mechanism. The clutch mechanism transmits the torque of the sheave to a second shaft of the fly ball speed governing mechanism when the sheave rotates in a forward direction, and disengages the transmission of the torque to the second shaft when the sheave rotates in a reverse direction.

Abstract: In a method for checking and adjusting an elevator governor which includes an emergency stop switch 20a) for tuning off the power supply of an elevator hoist to brake it; first and second fixed conductive guide rails (18) extending vertically the entire length of an elevator hoistway; an emergency brake (31) attached to an elevator car assembly containing an elevator car and a balance weight balancing therewith, for grabbing the first fixed conductive guide rail (18) to brake the elevator car assembly by friction; a magnet assembly (16) mounted on the elevator car such that it is displaced by an eddy current induced based on the relative speed between the second fixed conductive guide rail and the magnet assembly disposed opposite thereto; and an emergency stop mechanism for actuating the emergency brake (31) upon detecting that the displacement of the magnet assembly (16) has reached displacement corresponding to a critical speed critical; a pseudo speed generator, which generates speed by straight-line moti