JPH03182483A - Control device for elevator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a computer-based elevator control device.

[Prior art] When controlling elevator operation using a computer,
One problem is that elevators may become stuck between floors due to some kind of malfunction.

For safety reasons, elevators have a zone on each floor where the door can be opened, and only when the car stops within this zone.
The door of the basket is designed to open.

Therefore, an inter-floor stop here refers to when the elevator car stops outside the zone where the door can be opened, and in this case, for safety reasons, the door should not open even if the elevator stops. It has become.

Therefore, when the train is stopped between floors, it is necessary to quickly and safely release the passengers, so measures such as those shown in Japanese Patent Application Laid-Open No. 144071/1982 have been taken. This system allows the car to travel at low speed to the nearest floor when stopping between floors, and is equipped with two computers, so that even if one of the computers breaks down, the other computer can automatically or manually operate the car. It is configured in such a way that it is possible.

[Problems to be Solved by the Invention] However, in the conventional elevator control device, no measures have been taken for cases where the floor opening/stopping state is repeated not once but several times. In other words, depending on the type of elevator malfunction (for example, a malfunction in the winch motor's tachometer), the car may not be able to stop properly even if it is run to the nearest floor after the malfunction occurs, and the car may pass through the zone where the door can be opened. It may stop. In such a case, the vehicle tries again to travel to the nearest floor at low speed, but no matter how many times the vehicle tries, it is unable to stop in the zone where the door can be opened, which may result in a so-called permanent operation state.

Conventionally, there are no measures in place to prevent this kind of permanent operation, which not only poses a safety problem for the elevator, but also unnecessarily increases anxiety for the passengers trapped inside the car. invite

The present invention has been made in order to solve the conventional problems as described above, and an object of the present invention is to obtain an elevator control device having means capable of preventing a permanent operating state in the event of a failure.

[Means for Solving the Problems] An elevator control device according to the present invention is a device in which the operation of a car is controlled by a computer, and when the car stops between floors, the car is moved at low speed to the nearest floor, and means for detecting that the door has passed through and stopped in the zone where the door can be opened; means for counting the number of times the door has passed through and stopped in the zone where the door can be opened; By adding means to the computer to make it impossible to restart the computer, it is possible to prevent the computer from being in a permanent operating state.

[Function] In the present invention, if the inter-floor stopped state of the elevator is not resolved by running to the nearest floor, it is detected that the car has passed through the door opening zone of the nearest floor and has stopped. and count the number of times it passes and stops. Then, when the number of times reaches a certain value, restarting the car is disabled, thereby preventing the elevator from being in a permanent operating state.

[Example] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of an elevator control device of the present invention, and FIG. 2 is a block diagram showing functions of the present invention added to the control device.

In Fig. 1, 1 is an elevator car, 2 is a rope connected to car 1 at one end, 3 is a sheave around which rope 2 is wound, 4 is a counterweight connected to the other end of rope 2, and 5 is a rope connected to car 1. Sheave 3 drive motor, 6 is floor, 7 is car 1
8 is a plate installed in the hoistway for each floor 6 of each floor to form a zone 9 where the door can be opened. When the position detector 7 faces this plate 8, the position detector 8 detects the position. The device 7 emits an output cuff a for opening the door.

10 is a pulse generator that issues a speed signal 10a of the motor 5 to the microcomputer 11.

The microcomputer 11 that controls the elevator is
CPU12. RAM1B, ROM14. Input port 15
and an output port 16. 17 is a bus.

In FIG. 2, numeral 21 is a means for detecting that the car stops after passing through the door-openable zone 9 during low-speed running at the nearest floor after stopping between floors, and the above-mentioned position detector 7 and plate 8. 22 is means for counting the number of times the door-openable zone passes and stops during operation on the nearest floor in the detection means 21; 23 is a start prevention signal to the motor 5 when the count value of the counting means 22 reaches a certain value or more; This is a means of generating a ``flash'' and disabling future activation.

Next, the operation will be explained. When the position detector 7 provided on the car 1 faces the plate 8 installed one for each floor 6, it emits an output signal a of "1". When the position detector 7 is not facing the plate 8, the output cuff a is "0".

When the output signal 7a of "1" is inputted via the human-powered boat 15, the microcomputer 11 recognizes this as a door-openable signal. Based on this recognized door-openable signal, a door-opening command (not shown) is issued to the car 1.

In addition, the fact that car 1 has passed door opening zone 9 means that
The microcomputer 11 monitors the output cuff a of the position detector 7, and recognizes it when the signal 7a changes from 0 to 1-0. Then, when the output cuff a of the position detector 7 becomes "0", it is recognized that the car 1 has stopped between the floors.

When the car 1 stops on the floor, the microcomputer 11
makes the car 1 travel at low speed to the door opening zone 9 on the nearest floor. In other words, the car speed is determined by the pulse generator 10
feedback via the microcomputer 11
An appropriate torque command 16a is output to the motor 5 based on the deviation between a reference speed command (not shown) calculated and generated internally and the output 10a (car speed) of the pulse generator 10. Then, when the position detector 7 faces the plate 6 and its output cuff a becomes "1", the microcomputer 11 cuts off the torque command 16a to the motor 5 and stops the car 1. Next, a door opening command is output to car 1, and the door opens to release the passengers inside.

However, if car 1 repeatedly stops between floors, it will be in a permanent operating state. Therefore, in order to avoid this, the following steps are taken.

To explain according to the flowchart in FIG. 3, first, in step 31, it is determined whether or not the car has been operated at a low speed to the nearest floor. If the nearest floor operation has been performed, in the next step 32, the stopping position of the car is set to the door. Determine whether the vehicle has passed through the openable zone and stopped. This passing/stopping is determined by the output signal 7a changing from 0 to 1-0 as described above. If, at this time, the vehicle passes through the door-openable zone and stops, the counting means 22 counts the number of passing and stopping times I in step 33, and compares this number of passing and stopping times I with a reference value (step 34). ). As a result, when the value exceeds this value, the activation prevention signal generating means 23 generates a activation prevention signal (not shown), thereby disabling the car from starting (step 35). The car is manually driven to the nearest floor and opened.

In the above embodiment, the operation at the nearest floor after stopping between floors is explained in the case where the traveling direction is either up or down, but a traveling direction switching means may be further added. In other words, a travel direction switching means is provided that issues a travel direction command opposite to the previous travel (travel through the door-openable zone/travel when stopped). As a result, for example, when the brake adjustment is poor or when the door passes or stops due to load conditions, if the vehicle is driven in the opposite direction at low speed, there is a high possibility that the door can be successfully stopped within the door-opening zone, and permanent operation is possible. This has the effect of not only preventing this, but also rescuing passengers inside the car.

[Effects of the Invention] As described above, according to the present invention, when the car repeatedly passes through and stops in the door-openable zone during operation at the nearest floor after stopping between floors, restarting the elevator is made impossible. This prevents the elevator from operating permanently, which not only improves the safety of the elevator, but also prevents unnecessarily increasing the anxiety of the passengers trapped in the car.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an elevator control device according to an embodiment of the present invention, FIG. 2 is a block diagram showing the functions of the present invention added to the control device, and FIG. 3 is a flowchart showing the operation of the present invention. be. 1... Car 5... Motor 6... Floor 7... Position detector 8... Plate 9... Door opening possible zone 11... Microcomputer 21... Door opening possible zone Passage/stop detection means 22
. . . Counting means 23 for counting the number of times the door passes through and stops in the door-openable zone. . . Activation prevention signal generation means. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] In a device for controlling the operation of a car by a computer, when the car stops between floors, the car moves through a door-openable zone provided for each floor by operating the car at the nearest floor. means for detecting that the car has passed and stopped; means for counting the number of times the car has passed through and stopped in the zone where the door can be opened; and when the number of times determined by the counting means reaches a certain value, it is impossible to restart the car. 1. An elevator control device, characterized in that said computer is further equipped with means for controlling said computer.