JPH01256481A - Controller for elevator - Google Patents

Abstract

PURPOSE:To rescue passengers quickly and safely by driving a brake control circuit with a trouble time operating circuit through each detection signal out of both trouble and floor contact detectors, and operating a troubled elevator up to a floor contact position. CONSTITUTION:When trouble occurs in a microcomputer 2 and a motor control circuit 3 or the like, the trouble detecting signals 10, 11 are inputted into a trouble-time brake control circuit 7. With this input, the trouble-time brake control circuit 7 transmits a command signal 12 for brake opening to a brake control circuit 6 upon checking each signal of a safety circuit 8 or the like, and also transmits it to the brake control circuit 6 as an intermittent signal in a fixed period by a one-shot circuit 13, thereby moving an elevator in the load direction, and a cage is made contact with the nearest floor and stopped thereat. Thus, even if the elevator gets out of order, passengers are rescuable earlier in safe.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to an improvement in an elevator control device.

(Prior Art) As buildings have become taller in recent years, elevators have become more popular. Also, with the recent spread of semiconductors, many elevator control devices using microcomputers and the like are being used. Systems that use these microcomputers have become capable of achieving advanced and complex functions, but because microcomputers use a large number of parts, even a malfunction in one of the ICs can cause the elevator to malfunction. In particular, if a failure occurs in a circuit related to electric motor control, the elevator may stop at the location where the failure occurred, leaving passengers trapped, causing anxiety for passengers and also for managers. This was an inconvenience, and in some cases could even become a social problem.So, this is the next problem. The conventional elevator control circuit will be explained and the problems will be clarified.

FIG. 2 is a block diagram of a conventional elevator control device. 1
is a signal input to operate the elevator in the doorway, 2 is a microcomputer circuit that processes the above signal, 3 is a motor control circuit for operating the elevator, and 4 is a hoisting circuit for driving the elevator. 5 is an elevator car, and 6 is a brake control circuit.

(Problems to be Solved by the Invention) Next, the operation of the conventional control device will be explained and the problems will be clarified. Signals from the peripheral circuits of the elevator are input to the microcomputer circuit 2, which performs predetermined calculations, processes the elevator operating direction, speed standards, etc., and sends signals to the motor control circuit 3. , drives the electric motor, further drives the hoisting machine 4 directly connected to the electric motor, and operates the elevator car 5 to a predetermined floor at a predetermined speed to transport passengers. The above is a simple sequence of elevator control, and as shown here, sequence control is mainly performed. The microcomputer circuit and the motor control circuit are the two main systems in the elevator control system, and if either of these two systems fails, the elevator will not be able to continue operating, and if it is still in operation, it will stop working on the middle floor. The elevator breaks down and passengers are trapped. In particular, in the case of a failure in the motor control circuit, inspection operations are impossible and it becomes difficult to rescue passengers.

As described above, in the case of a conventional control circuit, if the circuit breaks down, it is difficult to rescue the vehicle, causing a great deal of inconvenience to passengers and managers using the vehicle.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to realize a control device that can quickly and safely rescue elevator passengers even if the elevator malfunctions.

[Structure of the invention]

(Means for Solving the Problems) FIG. 1 is a block diagram of the present invention. 1 is an input signal for the door alarm, 2 is a microcomputer circuit that performs sequence control, etc., 3 is a motor control circuit, 4 is a hoisting machine, 5 is an elevator car, 6 is a brake control circuit, 7 is a brake control circuit in the event of a failure, 8 is a safety confirmation signal for a door, etc.; 9 is an input signal of the above-mentioned signal; and 10 and 11 are failure detection signals for a microcomputer circuit and a motor control circuit, respectively. Reference numeral 12 is an exit signal of the brake control circuit at the time of failure.

(Function) When a failure occurs in the microcomputer, motor control circuit, etc., a failure detection signal 10 or 11 is input to the failure brake control circuit 7. In addition to these failure signals, the failure brake control circuit 7 receives signals from the elevator door safety circuit 8 and the like. In the failure brake control circuit, when a failure occurs in the motor control circuit 3 or the like, a command signal 12 to release the brake is sent to the brake control circuit 6 after checking signals from the safety circuit 8 or the like. In the brake control circuit 6, the brake is released and the elevator is operated in the same manner as the brake control signal in normal operation. In this way, by releasing the brake, the elevator can move in the direction of the load, but the speed cannot be controlled and it will accelerate, so a one-shot circuit 13 is provided to control it at a constant cycle. The circuit has a circuit that does not exceed the speed.

Additionally, a landing position signal input circuit 14 is provided to detect when a passenger has reached a position where a passenger can be rescued. Stop.

(Example) Next, one embodiment of the present invention will be described.

FIG. 3 is a block diagram of an embodiment of the present invention. 20 is a signal inversion circuit, 21 is an OR logic circuit, 22, 23 is an AND logic circuit, and 24 is an oscillation circuit that oscillates a pulse with a constant period.

Next, the operation of this embodiment will be briefly explained. A signal indicating a failure of the control device is input to the OR circuit 21, and when a failure occurs in either the microcomputer or the motor control circuit, the output of the OR circuit becomes valid. The signal from the safety circuit also holds true if it is okay to operate the elevator. Further, the landing detection signal 14 is transmitted through the inverting circuit 20 and is valid only when the vehicle has landed on the floor and is outside the bell. These signals are input to the AND circuit 22, and the output of the AND circuit 22 only holds true if all conditions are met (a failure has occurred, the condition is outside the landing level, and the safety circuit has been confirmed). Furthermore, this signal, the output signal of the pulse generation circuit 24 which oscillates pulses at a constant period, and the AND circuit 2
3, and only when the signal is output, the pulse signal is output and sent to the brake control circuit 6 as a brake ON/OFF control signal 12,
Drive the elevator. When the elevator reaches the landing level and reaches a position where the passenger can be rescued, the landing signal 14 becomes ONL, and the input signal to the AND circuit 22 does not hold, so the brake operation is stopped.

As shown in the embodiments of the present invention, the elevator can be operated to a position where the elevator passengers can be rescued using a simple circuit, and even if the main part of the elevator control device breaks down, the passengers can still be trapped. There is no.

〔Effect of the invention〕

=7- By applying the present invention to an elevator control device, an elevator can be realized as a safe and convenient means of transportation.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram of the present invention, Figure 2 is a conventional configuration diagram, and Figure 3 is a configuration diagram of the present invention.
The figure is a configuration diagram of an embodiment of the present invention. 1... Input signal circuit 2... Microcomputer circuit 3... Motor control circuit 4... Elevator hoisting material 5... Elevator car 6... Brake control circuit 7... Brake circuit in case of failure 8...
Safety circuit 9... Safety signal input 10... Microcomputer failure signal 11... Motor control circuit failure signal 12... Brake release signal at failure 13... One-shot circuit 14... Landing detection signal Agent Patent Attorney Noriyuki Chika Yudo Ken Daishimaru

Claims (1)

[Claims] a microcomputer circuit that performs various processes to control the operation of the elevator; a motor control circuit that controls the motor according to instructions from the microcomputer circuit;
A failure detection circuit for the microcomputer circuit and the motor control circuit; a brake control circuit for controlling a brake provided on a hoisting machine that drives the elevator; A failure operation circuit is provided, which includes a floor landing detection device for detecting a floor landing, and sends a signal to the brake control circuit based on the detection signal from the failure detection circuit and the floor landing detection device, and operates the malfunctioning elevator to the floor landing position. An elevator control device characterized by: