JPH0551183A - Elevator control device - Google Patents

Abstract

PURPOSE:To heighten the safety of an elevator by detecting the failure of a position switch so as not to open the door of the elevator by mistake even at the time of the elevator stopping between the floors for some cause. CONSTITUTION:The pulse number synchronous with the rotating speed of a motor for driving a cage is counted by a counting circuit 8, and the elevated moving quantity of the cage is computed by a cage moving quantity computing means 17 on the basis of the counted pulse number. The detection signal 'on' is outputted by a position switch 2 installed at the cage on the basis of the position of a plate installed in an elevating path in correspondence with each floor. The detection block moving quantity of the cage at the detection signal 'on' time is computed by a detection block moving quantity computing means 18, and the failure of the position switch 2 is judged by a position switch failure judging means 19 on the basis of the elevated moving quantity and detection block moving quantity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention detects a failure of a position switch attached to an upper portion of an elevator car,
The present invention relates to an elevator control device for controlling door opening.

[0002]

2. Description of the Related Art A conventional elevator control device will be described with reference to the drawings. FIG. 3 is a block diagram showing a conventional elevator control device disclosed in, for example, Japanese Patent Laid-Open No. 62-205982. In the figure, 1 is an elevator basket, 2 is a basket 1
Position switch attached to the upper part of the, 3 is a counterweight connected to the basket 1 via the rope 4, 5 is a sheave around which the rope 4 is wound, 6 is a motor that drives the sheave 5 to raise and lower the basket 1. , 7 is a pulse generator connected to the motor 6 to generate a pulse synchronized with the rotation speed of the motor 6, 8 is a counting circuit for counting the number of pulses generated by the pulse generator 7, and 9 is a position switch 2 The detection signal b and the count value a generated by the counting circuit 8 are input to the microcomputer. Further, 10 is a plate installed in the hoistway corresponding to a plurality of floors.

FIG. 4 is a functional block diagram of the microcomputer 9 shown in FIG. In the figure, 11 is a car position detecting means for calculating the current position of the car 1 based on the count value a output from the counting circuit 8, and 12 is a calculation result of the car position detecting means 11 and a stopping operation of the car 1. Based on the time from the start of deceleration to the stop, the basket position detection means
11 is an error calculation detecting means for detecting the presence or absence of error calculation, 13 is a remaining distance calculating means for calculating the remaining distance to the floor to be landed on the basis of the calculation result of the basket position detecting means 11, 14 is this remaining distance calculating means Zone detection means for calculating each zone where the position switch 2 is turned on and off based on the output of 13, position detection means 15 for detecting the current position of the car 1 based on the detection signal b of the position switch 2, and 16 for this It is a failure determination means that inspects the detection result of the position detection means 15 based on the calculation result of the zone detection means 14 and detects whether or not there is a failure in the position switch 2.

Next, the operation of the conventional example will be described. Motor 6
The rope 4 is wound up and down by the rotation of the sheave 5, and the car 1 is moved up and down to the floor to be landed.
When the position switch 2 attached to the basket 1 comes to the position of the plate 10 corresponding to the floor to be landed, the detection signal b of the position switch 2 is turned on from the off state. This detection signal b is input to the microcomputer 9, and the microcomputer 9 detects that the detection signal b is on, determines that the car 1 has reached the door openable zone, and opens the door.

On the other hand, while the car 1 is moving up and down, the current position of the car 1 is detected by the car position detecting means 11 in the microcomputer 9 based on the count value a synchronized with the rotation of the motor 6 from the counting circuit 8. It Remaining distance calculation means 13
Calculates the remaining distance of the car 1 to the floor to be landed on the floor based on the output of the car position detecting means 11. Further, the zone detecting means 14 detects a zone in which the position switch 2 is normally off based on the output of the remaining distance calculating means 13. If the detection signal b is ON in the zone determined by the zone detecting means 14, the failure determining means 16 determines whether the position switch 2
Determine that is broken. Also, the miscalculation detection means 12
Detects whether or not the detection result of the basket position detecting means 11 is incorrect, and invalidates the determination of the failure determining means 16 when the result is incorrect.

[0006]

Since the conventional elevator control device is constructed as described above, in order to avoid erroneous detection of a failure of the position switch 2, the remaining distance is erroneously calculated or the current cage is present. If the position is detected incorrectly,
Although the failure detection of the position switch 2 by the failure determination means 16 is disabled, if the position switch 2 actually fails in this case, the door 1 is opened when the car 1 stops between floors for some reason. There was a problem that it did.

The present invention has been made in order to solve such a problem, and an object thereof is to obtain an elevator control device capable of surely detecting a failure of a position switch and improving safety of the elevator. And

[0008]

SUMMARY OF THE INVENTION An elevator control apparatus according to the present invention is a counting means for counting pulses in synchronization with the number of rotations of a motor for driving a car, and an ascending / descending amount of the car based on the output of the counting means. A car movement amount calculation means for calculating the car, which is installed in the car and represents the current position of the car based on the positions of the plates installed in the hoistway corresponding to a plurality of floors as the car moves up and down. Position detection means for outputting a detection signal, detection section movement amount calculation means for calculating the detection section movement amount of the basket while the detection signal is being output based on the output of the counting means, and the ascending / descending movement. A failure determination means for determining a failure of the position detection means based on the amount and the detection section movement amount is provided.

[0009]

According to the present invention, the counting means counts the pulses synchronized with the rotation speed of the motor for driving the car, and the car movement amount calculating means calculates the ascending / descending movement amount of the car based on the output of the counting means. It Further, as the car is moved up and down, the position detection means installed in the car detects the current position of the car based on the positions of the plates installed in the hoistway corresponding to a plurality of floors. Output a signal. Furthermore, the detection section movement amount calculation means calculates the detection section movement amount of the basket while the detection signal is output, based on the output of the basket movement amount calculation means. Then, the failure determination means detects a failure of the position detection means based on the ascending / descending movement amount and the detection section movement amount.

[0010]

【Example】

Example 1. Embodiment 1 of the present invention will be described with reference to the drawings.
First Embodiment FIG. 1 is a block diagram showing a main part of a first embodiment of the present invention. In the figure, 9A is a microcomputer connected to a position switch 2 and a counting circuit 8 instead of the microcomputer 9 of FIG. 3, and in this microcomputer 9A, 17 is a predetermined calculation of the count value a from the counting circuit 8. Car movement amount calculating means for fetching and integrating for each cycle to calculate the cage movement amount, reference numeral 18 for detecting section movement amount calculating means for calculating the cage movement amount based on the state of the detection signal a of the position switch 2, and 19 Is a position switch failure determination means for determining a failure of the position switch 2 based on the output of the basket movement amount calculation means 17 and the output of the detection section movement amount calculation means 18.

Next, the operation of the first embodiment will be described based on the flowchart of FIG. First, in step S1,
If it is determined whether or not the elevator is running, and if it is determined to be running (YES), step S2
Proceed to. In step S2, it is determined whether the position switch 2 is normal and the failure detection flag is off,
If it is determined to be off (if YES), step S3
Proceed to. Then, in step S3, the car movement amount calculation means 17 calculates the car movement amount.

Then, in step S4, the detection section movement amount calculating means 18 detects the detection signal b of the position switch 2, determines whether the position switch 2 is off, and determines that it is off. If (YES), the process proceeds to step S5. Then, in step S5, the detection section movement amount calculation means 18 calculates the cage movement amount when the position switch 2 is off based on the count value a.
(Movement amount in the off section) is calculated, and the process proceeds to the next step S6. Further, in step S4, when the detection section movement amount calculating means 18 determines that the position switch 2 is ON (in the case of NO), the process proceeds to step S6.

Next, in step S6, the position switch failure determination means 19 calculates the cage movement amount calculated based on the rotation of the motor in step S3, and a predetermined distance for failure detection determination (for example, from the floor) 240m up and down
It is determined whether or not m) has been reached, and if it is determined that it has reached, the process proceeds to step S7. In step S7, it is determined whether or not the amount of movement in the off section is equal to or greater than a preset specified value (for example, 500 mm above and below the floor), and if it is determined to be equal to or larger than the specified value (YES If the position switch 2 is normal, the process proceeds to step S8. Then, in step S8, the position switch failure determination means 19 turns off the failure detection flag,
In step S9, the basket movement amount is reset, and the operation ends. If the position switch failure determination means 19 determines in step S7 that the amount of movement in the off section has not reached the specified value (in the case of NO), it is determined that the position switch 2 is in failure, and step S10 Proceed to.
Then, in step S10, the failure detection flag is turned on, and the operation ends.

When it is determined in step S1 that the car 1 is not traveling (in the case of NO), the process proceeds to step S9, and the position switch failure determination means 19 resets the car movement amount in step S9. Then, the operation ends. If it is determined in step S2 that the failure detection flag is off (NO), the operation ends. Furthermore, in step S6, when the position switch failure determination means 19 determines that the basket movement amount has not reached the failure detection determination distance (in the case of NO),
The operation ends.

Example 2. In the first embodiment, the car movement amount when the position switch 2 is off is calculated, and if the car movement amount does not reach the specified value, the position switch 2
Although it is determined that the position switch 2 is in failure, the car movement amount when the position switch is ON is calculated, and when the car movement amount is equal to or more than the specified value, it is determined that the position switch 2 is in failure. You may do it.

Embodiment 3. In the first embodiment, the car movement amount calculated by the car movement amount calculating means 18 is the position switch 2
If it is determined that the failure detection determination distance of is reached, the basket movement amount is reset, but without resetting,
The basket movement amount may be continuously calculated.

[0017]

As described above, according to the present invention, the counting means for counting the pulses synchronized with the number of rotations of the motor for driving the basket, and the basket for calculating the vertical movement amount of the basket based on the output of the counting means. Based on the position of the plate installed in the hoistway corresponding to a plurality of floors as the car is moved up and down, the detection signal representing the current position of the car Based on the output of the position detection means and the counting means, the detection section movement amount calculation means for calculating the detection section movement amount of the basket while the detection signal is being output, the elevation movement amount and the Since the failure determination means for determining the failure of the position detection means based on the detection section movement amount is provided, the failure of the position detection means is reliably detected, and therefore the elevator stops between floors for some reason. Without having to door open when an effect that it is possible to enhance the safety surname of the elevator.

[Brief description of drawings]

FIG. 1 is a block diagram showing a main part of a first embodiment of the present invention.

FIG. 2 is a flow chart for explaining the operation of the first embodiment of the present invention.

FIG. 3 is a configuration diagram showing a conventional elevator control device.

FIG. 4 is a functional block diagram of a microcomputer of a conventional elevator control device.

[Explanation of symbols]

 2 position switch 8 counting circuit 17 basket movement amount calculation means 18 detection zone movement amount calculation means 19 position switch failure determination means

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[Procedure amendment]

[Submission date] July 30, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction content]

Next, in step S6, the position switch failure determination means 19 calculates the cage movement amount calculated based on the rotation of the motor in step S3, and a predetermined distance for failure detection determination (for example, from the floor) 1000 m up and down
It is determined whether or not m) has been reached, and if it is determined that it has reached, the process proceeds to step S7. In step S7, it is determined whether or not the amount of movement in the off section is equal to or greater than a preset specified value (for example, 80 mm above and below the floor), and when it is determined that the value is equal to or larger than the specified value (YES. In the case of), the position switch 2 is determined to be normal, and the process proceeds to step S8. Then, in step S8, the position switch failure determination means 19 turns off the failure detection flag,
In step S9, the basket movement amount is reset, and the operation ends. If the position switch failure determination means 19 determines in step S7 that the amount of movement in the off section has not reached the specified value (in the case of NO), it is determined that the position switch 2 is in failure, and step S10 Proceed to.
Then, in step S10, the failure detection flag is turned on, and the operation ends.

Claims (1)

[Claims] 1. A counting means for counting pulses synchronized with the number of rotations of a motor for driving a car, a car movement amount calculation means for calculating an ascending / descending amount of the car based on an output of the counting means, and a car moving amount calculating means installed in the car. The position detecting means for outputting a detection signal for indicating the current position of the basket based on the positions of the plates installed in the hoistway corresponding to the plurality of floors as the basket moves up and down. Based on the output of the counting means, the detection section movement amount calculating means for calculating the detection section movement amount of the basket while the detection signal is being output, and based on the ascending / descending movement amount and the detection section movement amount An elevator control apparatus is provided with a failure determination means for determining a failure of the position detection means.