BRAKE DEVICE FOR ELEVATOR

• US 20100101897A1
• Filed: 03/27/2007
• Published: 04/29/2010
• Est. Priority Date: 03/27/2007
• Status: Active Grant

• Current Assignee: Murolet IP LLC
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Hashimoto, Jun, Ueda, Takaharu
• Granted Patent: US 8,297,411 B2
• Time in Patent Office: Days
• US Class Current: 187/254
• CPC Class Codes: B66B 1/285 with the use of a speed pattern generator
• CPC Class Codes: B66B 1/32 effective on braking devices , e.g. acting on electrically controlled brakes brake control H02P, lift brakes per se B66B5/02

Abstract

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.

Claims

1. An elevator apparatus, comprising:

a car and a balance weight suspended by a main rope;

a hoist that generates driving force for moving the car and the balance weight;

a movement detector that generates a signal corresponding to movement of the car;

a brake device that brakes the movement of the car in a state in which driving of the hoist is stopped; and

a brake control device that generates a target pattern concerning at least one of speed and acceleration of the car in a state in which the driving of the hoist is stopped and that controls braking force of the brake device based on the signal from the movement detector such that the movement of the car follows the target pattern.

2. An elevator apparatus according to claim 1, wherein the brake control apparatus increases the braking force of the brake device when the signal from the movement detector is larger than the target pattern and reduces the braking force of the brake device when the signal from the movement detector is smaller than the target pattern.

3. An elevator apparatus according to claim 1, further comprising car floor-landing range detecting means for detecting whether or not a position of the car falls within a predetermined floor-landing range,

wherein, when the car floor-landing range detecting means detects entrance of the car into the allowed floor-landing range, the brake control device generates the target pattern for decelerating the car.

4. An elevator apparatus according to claim 3, wherein the brake control device generates, based on information concerning a floor-landing position in a landing located within the allowed floor-landing range and the signal from the movement detector, the target pattern for decelerating the car such that a stop position of the car coincides with the floor-landing position in the landing.

5. An elevator apparatus according to claim 1, wherein the brake control device performs start and stop of control of the brake device according to presence or absence of operation of a remote operation device.

6. An elevator apparatus according to claim 1, wherein the brake device and the brake control device receive power supply from an electrical storage device.