JPS623746B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a device that performs power-saving operation of an elevator.

In recent years, there has been a growing trend in society to save energy, and elevators are also required to satisfy the two demands of providing enhanced service to passengers waiting in the hall and saving power consumption.

In other words, if a predetermined car out of multiple cars is put out of service in order to save power, the number of cars serving calls will decrease, resulting in a decline in service to customers. Although it is effective, it is insufficient in terms of maintaining a good service condition. In this way, it has become necessary to satisfy two contradictory demands.

Conventionally, in order to conserve electricity in elevators, when traffic in the building is quiet, the speed (maximum speed, acceleration, etc.) of a specific car is set lower than usual to reduce the power consumption when the car starts up and is running. Power-saving operation is being carried out to reduce the amount of electricity. Also,
In order to reduce the burden on staff, it is also being considered that certain cars can be operated in a power-saving mode during predetermined times.

However, it is known that when power-saving operation is performed, it naturally takes longer to travel a certain distance than usual, and the number of activations during a certain period of time also decreases. Therefore,
If you run a specific car in power-saving mode every day, cars other than this specific car will start up more times than the above-mentioned specific car, or the running time of the above-mentioned specific car will be longer, resulting in failures. It becomes easier to do. Furthermore, since the wear of mechanical parts increases, the period until maintenance is shortened, and the frequency of maintenance increases.

The present invention is intended to improve the above-mentioned problems, and aims to provide a power-saving operation device for an elevator that can equalize the operating time of each car and reduce the number of failures and maintenance.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. Note that the numbers suffixed with A to C represent the first to third machines, respectively.

In the figure, 1 is a power-saving operation car selection circuit, 2A to 2
C is a running signal that is "L" when cars 1 to 3 are stopped and "H" when they are running, 3A to 3C.
is a counter that counts the number of inputs that become "H", 4
is a maximum value selection circuit, and only when input T is "H", selects the largest cage with the corresponding inputs Ia to Ic from among the cages whose inputs Ga to Gc are "L".
Car selection (A if there are multiple cars with the maximum value)
→ Select in the order of B → C. ) and generates the corresponding output Pa~Pc. Output Pa-Pc is "H" only for the car corresponding to the maximum value, and "L" for the others. Further, when the inputs Ga to Gc are all "H", the outputs Pa to Pc are also all "L". 5A to 5C are R-S flip-flops (hereinafter referred to as memory), 5aA to 5aC are memories 5A to 5C
When the output becomes "H", the car's maximum speed is set lower than the normal 240 m/min to 150 m/min, and when it becomes "L", the car's maximum speed is set to 240 m/min.
A power-saving operation designation signal that commands to set min to enter normal operation, 6 is a counting circuit that counts the number of inputs that are "H", 7 is input X > input Y
A comparator whose output is "H" when the input is x and an output "L" when the input is Y. 8 is a maximum value selector that selects and outputs the maximum value among the inputs, and 9 is a Minimum selector that selects and outputs the minimum value, 1
0 is a subtracter that outputs input
A periodic pulse generator 14 generates a pulse signal 13a at a constant period T (for example, 10 minutes) as shown in the figure.
is an AND gate, 15 is an OR gate, 16 is a clock that emits a time zone signal when a predetermined time zone comes, and 17 is a power saving operation designation that indicates the preset number of power saving operation units when the time zone signal is input. This is a device for setting the number of power-saving operating units that emits a number signal 17a and, when the number of operating units in power-saving operation changes, a pulse signal 17b shown in FIG.

Next, the operation of this embodiment will be explained.

Now, at a time when traffic is very quiet, the clock 16 and the power-saving operation number setting device 17 set the power-saving operation number signal 17a to 1 unit, and unit No. 3 receives the power-saving operation designation, and the power-saving operation number signal 17a is set to 1 unit. Operation designation signal 5
aA, 5aB are "L", power saving operation designation signal 5aC
Suppose that it is "H".

Up to now, the number of times that the first to third machines have been started has been counted by the counters 3A to 3C as the number of times the running signals 2A to 2C have become "H", respectively.

Currently, the number of startups is 500 times for the first machine and 400 times for the second machine.
Assuming that Unit 3 is counted as 340 times,
The maximum value selector 8 selects 500 times, and the minimum value selector 9 selects 340 times. 500−340 in subtractor 10
= 160 times, so 160 > 100 by comparator 12
Therefore, the output becomes "H". Here, when the pulse signal 13a of the periodic pulse generator 13 is emitted, the output of the AND gate 14 becomes "H",
The output of the OR gate 15 also becomes "H", and the memory 5
A to 5C are all reset. Now, the power saving operation designation signals 5aA to 5aC are all "L", so the output of the counting circuit 6 is in the zero range. Since the power-saving operation designated number signal 17a is for one unit, 1>0 in the comparator 7, and its output becomes "H". The input T of the maximum value selection circuit 4 becomes "H",
Since inputs Ga to Gc are all "L", input Ia
The car with the maximum value of ˜Ic, that is, the car No. 1 which is 500 times, is selected, the output Pa becomes "H", and the outputs Pb and Pc both become "L". Therefore, the memory 5A is set, and the power saving operation designation signal 5aA of the first unit is set to "H".
becomes. As a result, the output of the counting circuit 6 becomes one, and since 1=1 in the comparator 7, its output becomes "L". Since the input T of the maximum value selection circuit 4 has become "L", the outputs Pa to Pc are all "L"
Then, the selection of the power-saving operation car is completed. Therefore, in place of Unit 3, which has fewer startups,
Car No. 1, which has been activated many times, has been newly designated for power-saving operation and operates with the maximum speed of the car reduced to 150 m/min.

Along with this, the number of times the No. 2 and No. 3 machines are started will gradually increase and approach the number of times that the No. 1 machine will be started.

In addition, when the power-saving operation designated number signal 17a specifies 2 cars, the output of the counting circuit 6 is 1 car after the 1st car is selected as the 1st car, so the comparator 7 outputs 1 car. 2>1, and the output becomes "H". Therefore, this time the input Ga~Gc
is "L", that is, car No. 2, which is the car with the largest number of activations among No. 2 and No. 3 cars, is selected, and the output Pb becomes "H". Now memory 5
B is set, and power saving operation designation signal 5 of unit 2 is set.
aB becomes "H". Further, the output of the counting circuit 6 becomes two, the output of the comparator 7 becomes "L", and the selection of the power-saving operation car is completed.

On the other hand, if the number of devices designated for power saving operation decreases from 2 to 1, or increases from 1 to 1, the pulse signal 17b becomes "H".
The output of the OR gate 15 becomes "H", and the memory 5
All of A to 5C are reset, and the selection of the car designated for power saving operation is immediately carried out again.

In the embodiment, the power-saving operation car is selected based on the number of activations, but the running time of the car (the cumulative value of the time when running signals 2A to 2C are "H", which can be measured with a well-known device) ), or the selection may be made by taking both of them into account (for example, a combination such as number of activations/running time).

Further, the fixed number of times signal 11 is for detecting that the number of times of starting (or running time) has become unbalanced between the cars, while the pulse signal 13a
are determined in anticipation of the occurrence of such imbalance, and are not limited to 100 times and 10 minutes, respectively. Further, the change may be made taking into consideration the traffic condition of the elevator, the number of years since the building was installed, etc.

Although the power saving operation number setting device 17 changes the designated number of power saving operation devices depending on the time, it is not limited to this. For example, the following may be used.

(a) A staff member selects and specifies the number of power-saving operation units by operating a switch provided on the control panel.

(b) Set the number of power-saving operating vehicles to maintain the service at a certain level depending on the service status of hall calls (for example, the waiting time at the hall).

In addition, if the difference between the maximum and minimum number of startups exceeds a predetermined number, the car will be reselected as the car designated for power-saving operation starting from the largest car, but the conditions for re-selection are limited to this. do not. For example, you may do as follows.

(a) Simply do it periodically (for example, every 10 minutes).

(b) Calculate the difference between the number of starts or running time and their average value, and determine if this is greater than (or less than) a predetermined value.
This is done when a basket occurs.

(c) This is carried out when a car occurs where the difference between the number of starts or running time and the number of starts or running time of a car designated for power-saving operation is greater than (or less than) a predetermined value.

As explained above, in this invention, the number of times each car is started or the running time is measured, the largest or smallest car is selected in order, and that car is preferentially operated at a low speed to save power. In addition, it is possible to perform power-saving operation while preventing deterioration of service to customers, and the operating status of each car at that time is equalized, making it possible to reduce the number of failures and maintenance times.

In addition, when the number of activations or running times of each car becomes unbalanced, or periodically, the selection of the power-saving operation car is canceled and re-run, so failures can occur without sacrificing the power-saving effect. The number of maintenance operations can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a block circuit diagram showing an embodiment of an elevator power-saving operation device according to the present invention, and FIG. 2 is a pulse signal waveform diagram of FIG. 1. 1...Power-saving operation car selection circuit, 2A to 2C...1
Running signals for units No. 3 to No. 3, 3A to 3C...counter,
4... Maximum value selection circuit, 5A to 5C... R-S flip-flop, 5aA to 5aC... Power saving operation designation signal for units 1 to 3. Note that the same parts in the figures are indicated by the same reference numerals.

Claims (1)

[Claims] 1. A car that automatically selects a car that requires power saving from among a plurality of cars and operates the car by setting the speed of this car lower than during normal operation, A counter that measures the number of times each car is started or the running time. In response to the output of this counter, the cars should be prioritized for the power-saving operation in the order of the number of starts or the shortest running time. A power-saving operation device for an elevator, characterized by comprising a car selection circuit for selecting a car. 2. In a system in which a car that requires power saving is automatically selected from among multiple cars and the speed of this car is set lower than during normal operation, the number of times each car is activated or a counter that measures each running time; a car selection circuit that responds to the output of the counter and selects cars to be subjected to the power-saving operation preferentially in the order of the number of activations or in the order of the shortest running time; A re-execution circuit that periodically cancels the operation of the car selection circuit and operates it again to perform car selection when the number of activations or running times of each car becomes unbalanced among the cars, or periodically. A power-saving operation device for an elevator, characterized in that it is equipped with the following.