JPH0720831B2 - Elevator door control device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a control device using a computer for opening / closing control of an elevator door, and in particular, an elevator having different specifications is mixed and is not versatile. The present invention relates to an elevator door control device suitable when required.

[Conventional technology]

The opening and closing control of the elevator door requires a fairly fine speed control, but the door opening and closing mechanism using a mechanical linkage that has been widely used in the past can easily handle such speed control. It is possible.

However, when such a mechanical door opening / closing mechanism is used, every time the door dimensions are changed due to changes in the specifications of the elevator, a linkage mechanism that matches the changes is required, and the customer's requirements are fully met. Multi-model,
Considering small-scale production, it is extremely poor in versatility.

Therefore, in recent years, an elevator in which a linkage mechanism is not used by controlling the speed of an electric motor for driving the door opening and closing by a microcomputer has been widely used in recent years.

By the way, in the prior art of an elevator door control device using such a microcomputer, for example, as described in Japanese Patent Laid-Open No. 59-4590, an output signal from a door control microcomputer and this microcomputer are independent. The door opening / closing control is performed under the OR condition of both signals of the output signal from another circuit.

[Problems to be solved by the invention]

The above-mentioned conventional technology does not consider the point of failure or malfunction of the microcomputer that controls the door opening / closing motor.When a failure or malfunction of this microcomputer occurs, the door becomes an abnormal operation and at the worst, it may cause personal injury. There was a problem.

Therefore, an object of the present invention is to provide a door control device that is safe and has a coordinated protection even when the door control microcomputer fails or malfunctions.

[Means for solving problems]

The above-mentioned object is to independently provide an operation control microcomputer for controlling the elevator main body and a door control microcomputer for controlling the door, and the operation control microcomputer performs operation control and monitoring of the door control microcomputer. Even when an abnormality occurs in the control microcomputer, the operation control microcomputer can control the opening and closing of the door.

[Action]

The operation control microcomputer determines whether the door is open or closed by an input signal from the operation panel in the car or the hall button, and sends an open or close command signal to the door control microcomputer.

On the other hand, the door control microcomputer transmits a reception return signal to the control microcomputer after receiving the opening or closing command signal. As a result, when the door control microcomputer is operating normally, a normal reception / return signal can be transmitted, but when an abnormality occurs, the reception / return signal is naturally in the abnormal mode.

Accordingly, the control microcomputer can control and monitor the operation of the door control microcomputer, so that even when an abnormality occurs in the door control microcomputer, it is possible to prevent the opening / closing abnormality and the accident.

〔Example〕

Hereinafter, an elevator door control device according to the present invention will be described in detail with reference to the illustrated embodiments.

1 is an embodiment of the present invention, 1 is an AC power supply, 2 is a rectifier, 3 is an electric motor control circuit, 4 is a door opening / closing electric motor, 5 is an encoder, 6 is an elevator operation control device, and 7 is an operation. Control microcomputer, 8 door control device, 9 door control microcomputer, 10 PWM control circuit, 11 base drive circuit, 12
Is the contact of the switch.

The motor control circuit 3 is a tipper device having four bridge-connected transistors as a main part, and controls the tip of the DC power supplied from the AC power source 1 through the rectifier 2 to supply it to the DC motor 4 and the elevator. It works to open and close the doors of.

The electric motor 4 is provided with an encoder 5, which detects the opening / closing state of the elevator door, and the microcomputer 9 in the door control device 8 detects the open / close state of the elevator door based on the detection result.
A control signal is output to the controller, and the tipper device of the motor control circuit 3 is controlled via the base drive circuit 11 to control the rotation direction and rotation speed of the motor 4 so that the opening / closing operation of the door becomes a desired state. .

On the other hand, the microcomputer 7 in the operation control device 6 takes in necessary data from the operation panel installed in the elevator car or the hall as described above through the route not shown, and opens the door. A command signal for closing and closing is created and transmitted to the door control microcomputer 9 via the data bus B. Based on this command signal, the door control microcomputer 9 controls the door driving electric motor 4 described above.

By the way, in this embodiment, the door control microcomputer 9 receives the above-mentioned command signal and controls the electric motor 4, and at the same time creates a reception return signal in response to the reception of this command signal, and outputs this signal. The data is sent back to the operation control microcomputer 6. Then, in response to this, the operation control microcomputer 7 performs a comparison calculation between the above-mentioned command signal transmitted by itself and the reception and return signal, and the contact point is contacted according to the result.
Twelve opening controls are performed.

Next, the operation of this embodiment will be described in detail with reference to the flow chart of FIG.

(1) The operation control microcomputer 7 transmits a door open or door close command signal to the door control microcomputer 9 (step).

(2) The door control microcomputer 9 does not immediately start the door opening or closing operation after receiving the door opening or closing command signal, but sends a return signal indicating that the door opening or closing command signal is received to the operation controlling microcomputer 7 Call. As the return signal at this time,
It may be the same signal as the transmission signal from the microcomputer 7 or a predetermined coded signal (step).

(3) Next, the operation control microcomputer 7, after receiving the return signal of (2), compares and calculates with the door open or close command signal transmitted in (1) (step).

(4) In the above (3), if the transmission signal and the return signal match as a result of comparison and calculation, the operation control microcomputer 7
Sends an open / close permission signal from the door control microcomputer 9 to perform a predetermined door opening / closing operation (step
).

(5) In the above (3), when there is no match, the comparison and calculation are repeated N times, and when there is no match, the transmission is performed via the door control microcomputer 7 or the bus B. When it is determined that the reception communication signal S is abnormal, the operation of the door control microcomputer 9 is stopped, and the operation control microcomputer 7 causes the contact 12 of the switch to open so that the AC power supply 1 changes to the motor control circuit 3. The electric motor 4 is shut off (step, ~).

Therefore, according to this embodiment, the microcomputer has a plurality of configurations for elevator operation control and door control, and the answer / back method is adopted as the signal transmission / reception method to ensure reliable transfer. Therefore, it is possible to prevent an accident in which an erroneous signal is transmitted and received due to a transient noise or the like and malfunctions, and it is possible to obtain a safe and highly reliable system.

Further, if the door control microcomputer 9 malfunctions or malfunctions, the reception / return signal from the door control microcomputer 9 becomes abnormal. Therefore, the abnormality of the door control microcomputer 9 is detected, and the operation control microcomputer 9 is detected. Since the electric power supply to the electric motor 4 can be cut off by means of 7, it is possible to prevent a serious accident such as a door-opening operation in advance, and there is an effect that the system can be made even safer and more reliable.

Next, another embodiment of the present invention is shown in FIG.

The embodiment shown in FIG. 3 is different from the embodiment shown in FIG. 1 in that the door closing electric motor drive element 101, the door closing side opening / closing control means 51, and the door open electric motor drive element 102 constituting the electric motor control circuit 3 are provided.
Door opening side opening / closing control means 52 is inserted in each of them, and door opening / closing range detecting means 13 is further provided.

FIG. 4 shows an operational flow chart of the embodiment of FIG.
The operation will be described below according to each step number.

(1) Step → → → → is the same as that of the embodiment shown in FIG. Therefore, detailed description of the operation is omitted.

(2) If the transmission signal and the return signal do not match in step, the door opening / closing range detecting means 13 determines whether or not the elevator car is within the door opening / closing range.

As a result, when the car is within the door opening / closing range, the operation control microcomputer 7 opens the door closing side opening / closing control means 51. Next, the door-opening side opening / closing control means 52 is closed, and an opening / closing command signal is given from the operation control microcomputer 7 to the door control microcomputer 9 to perform the door opening operation. (Step → →).

At this time, even if the door control MPU 1 malfunctions or malfunctions and a door closing command signal is output at the same time as the door opening command, the door closing side opening / closing control means 51 is open, so the door closing motor drive element 101 does not operate. Therefore, accidents such as a power supply short circuit can be prevented.

(3) Next, if the car is out of the door opening / closing range in step, the door opening / closing control means 52 is opened, and the elevator is continued until the car reaches the door opening / closing range ( Step → → →).

According to this embodiment, there is an effect that the door can be prevented from being opened while the elevator is running, and a canning accident due to the stop between floors can be prevented.

FIG. 5 shows still another embodiment of the present invention.
The embodiment of FIG. 5 is different from the embodiments of FIGS. 1 and 3 in that a circuit for driving and controlling the motor control circuit 3 is provided with a signal comparison circuit 14 and an input signal of the signal comparison circuit 14 is provided. As an output signal S2 of the operation control microcomputer 7 and an output signal S1 of the door control microcomputer 9 are independently input,
As a result, the output signal S1 of the door control microcomputer 9 is compared with the output signal S2 of the operation control microcomputer 9, and only when they match, the input signal to the electric motor control circuit 3 is validated and door opening / closing control is performed. Let If they do not coincide with each other, the input signal to the electric motor control circuit 3 is invalidated so that the door opening / closing control is not performed, and the comparison determination signal is given.
S ₀ is transmitted to the operation control microcomputer 7 to perform an operation such as opening the contact 12 of the switch as in the above embodiment. The PWM control circuit is omitted.

According to this embodiment, even if the door control microcomputer 9 malfunctions or malfunctions, and even if the door control microcomputer 9 operates normally, the communication line from the door control microcomputer 9 to the electric motor control circuit 3 and Even if an abnormality occurs in the circuit, a malfunction can be prevented, so that there is an effect that safety and reliability can be further improved.

〔The invention's effect〕

According to the present invention, the operation control microcomputer for controlling the elevator main body and the door control microcomputer for controlling the opening / closing of the door are independently provided, and operation confirmation and mutual monitoring are performed by communication between the respective microcomputers for door control. When an abnormality occurs in the microcomputer, the operation control microcomputer can shut off the door opening and closing circuit and prevent the door opening operation, so compared to the conventional system composed of a single microcomputer,
This has the effect of improving safety and reliability.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of an elevator door control device according to the present invention, FIG. 2 is a flow chart for explaining the operation, and FIG. 3 is a block diagram showing another embodiment of the present invention. FIG. 4 is a flow chart for explaining the operation, and FIG. 5 is a block diagram showing still another embodiment of the present invention. 1 ... AC power supply, 2 ... Rectifier, 3 ... Motor control circuit, 4 ...
… Door open / close motor, 5 …… Encoder, 6 …… Elevator operation control device, 7 …… Operation control microcomputer, 8 …… Door control device, 9 …… Door control microcomputer, 10 …… PWM control circuit , 11
...... Base drive circuit, 12 ...... Switch contacts.

Claims (7)

[Claims] 1. A control of an electric motor for opening and closing an elevator door,
In the door control device of the elevator, the door opening / closing control computer independent from the operation control computer for performing the elevator operation control,
Comparison operation means for comparing and calculating a command signal given from the elevator operation control computer to the door opening / closing control computer and an output signal from the door opening / closing control computer to detect an abnormality, and for the elevator operation control The detection means for detecting an abnormality by detecting that there is no reception return signal returned from the door opening / closing control computer in response to the command signal given from the computer to the door opening / closing control computer, and the comparison calculation means are abnormal. When detecting an abnormality, at least one of the means for invalidating the output of the door opening / closing control computer and the comparison calculation means and the detection means detects an abnormality, and the elevator operation control computer issues a command according to the instruction. Power supply cutoff means for cutting off the power supply of the door opening / closing motor. Door control system of elevators. 2. The elevator door control device according to claim 1, wherein the comparison calculation means is constituted by program processing of the elevator operation control computer. 3. The calculation according to claim 1, wherein the comparison calculation means and the detection means control validity / invalidity of the output signal according to a comparison calculation result of the command signal and the output signal. An elevator door control device characterized by being configured with a circuit. 4. The elevator door control device according to claim 1, wherein the power cutoff means is constituted by a power switchgear for cutting off power supply to the electric motor. 5. The shutoff device according to claim 1, wherein the power cutoff means is activated only when the elevator car is out of the door opening / closing range to prohibit the door opening operation by the electric motor. An elevator door control device characterized by being configured with. 6. A circuit breaker according to claim 1, wherein the power cutoff means is activated only when the elevator car is within the door opening / closing range, and prohibits the door closing operation by the electric motor. An elevator door control device characterized by being configured. 7. The structure according to claim 1, wherein the comparison calculation means validates the comparison calculation result by repeating the comparison calculation processing of both signals at least twice. Elevator door control device characterized by being