JPS636123Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a power-saving operation command circuit for an elevator, which reduces the maximum speed of the elevator and saves power consumption when the number of passengers in the elevator decreases.

FIG. 1 is a block diagram of a conventional elevator power saving operation command circuit. In this Figure 1, 1
is a call counter that measures the number of hall and car calls, and 1a is its output signal, which becomes high (hereinafter referred to as "H") when the number of calls is ``3'' or less; This is a usage reduction signal that becomes low (hereinafter referred to as "L") when the number is "4" or more.

This utilization reduction signal 1a is transmitted to the delay element 2 and
It is now sent to NOT Gate 3. The delay element 2 generates an output signal 2a of "H" one minute after the utilization reduction signal 1a becomes "H", and the set input terminal of the storage element 4 (indicated as "S")
It is sent to

Furthermore, the NOT gate 3 is configured to invert the utilization reduction signal 1a and send an output signal 3a to the reset input terminal (indicated as "R") of the storage element 4, and the output signal 3a is output from the storage element 4. A speed reduction command signal 4a is output.

Next, the operation of the conventional elevator power saving operation command circuit configured as described above will be explained. If the car is currently waiting on the first floor and no calls are being made, the low utilization signal 1a is at "H".

If one minute has not elapsed since the utilization reduction signal 1a became "H", the output signal 2a of the delay element 2 is "L", so the memory element 4 is not set and the speed decreases. Since the command signal 4a is in the "L" state, when a call occurs, the elevator runs in response to that call without reducing its maximum speed.

In addition, the utilization decrease signal 1a becomes "H" and 1
If minutes have elapsed, output signal 2 of delay element 2
Since a is set to "H", the memory element 4 is set and the speed reduction command signal 4a is set to "H", and when a call occurs thereafter, the elevator lowers its maximum speed in response to that call. Run and perform power-saving operation.

If "4" or more calls occur during power-saving operation, the output signal of the call counter 1, that is, the utilization reduction signal 1a becomes "L", and the NOT gate 3
The output signal 3a is converted to the "H" state via the .

When the output signal 3a of the NOT gate 3 becomes "H", the memory element 4 is reset, so the speed reduction command signal 4a becomes "L" and the maximum speed is increased. In other words, it returns to maximum speed and cancels power saving operation.

However, the speed reduction command signal 4a causes the car to run
Regardless of whether the car is stopped or there are passengers in the car,
Sometimes it becomes "H" and sometimes it becomes "L". That is, slow down or speed up.

Therefore, if you reduce the speed while running at maximum speed, the car will suddenly decelerate, and if the distance traveled is long compared to the call, the time it takes for the car to stop will decrease at the maximum speed. It will take longer than if you don't do it.

Furthermore, if the power saving operation is canceled during power saving operation, that is, while the car is running at a reduced maximum speed, the car will suddenly accelerate and the car speed will be raised to the maximum speed.

If there are passengers in the car, the above-mentioned phenomenon may cause misunderstandings and disbelief, such as noticing the sudden change and thinking that the elevator has broken down.

This invention was made in order to eliminate the above-mentioned conventional drawbacks, and provides a power-saving operation command circuit for an elevator that does not cause misunderstanding or mistrust to passengers in the car when reducing or increasing the maximum speed. With the goal.

Hereinafter, an embodiment of the power saving operation command circuit for an elevator of this invention will be described based on the drawings. FIG. 2 is a block diagram showing the configuration of one embodiment. In FIG. 2, parts that are the same as those in FIG. 2 are given the same reference numerals, and their explanations will be omitted, and the parts that are different from those in FIG. 1 will be mainly described.

As is clear from comparing FIG. 2 with FIG. 1, in FIG. 2, parts indicated by reference numerals 5 and after are newly added to the circuit of FIG. 1. In other words, the output code 2a of the delay element 2 is an AND of two inputs.
The output signal 5a of the AND gate 5 is sent to the set input of the storage element 4.

Further, the output signal 3a of the NOT gate 3 is applied to the second input terminal of a two-input AND gate 6, and the output signal 3a of the AND gate 6 is
a is sent to the reset input terminal of the storage element 4.

On the other hand, 7 is a car call counter that measures only car calls, and the output signal 7 of this car call counter 7 is
a is sent to the second input terminal of AND gate 5 and the first input terminal of AND gate 6.
This output signal 7a becomes "H" when no car calls are occurring, and becomes "L" when even one car call is occurring.
This will be referred to as a car call occurrence detection signal.

Next, the operation of the elevator power saving operation command circuit of this invention configured as above will be explained.

Assuming that two car calls (first and second) occur in a state where power-saving operation is not being performed, and the elevator is running in response to the first car call, the currently registered platform Since the total number of calls for the car is 2 (3 or less), the usage reduction signal 1a, which is the output signal of the call counter 1, is "H".

Here, if one minute has elapsed since the utilization level reduction signal 1a became "H", the output signal 2a of the delay element 2 becomes "H". However, since there is a car call, the car call occurrence detection signal 7a output from the car call counter 7 is "L".

Therefore, the output signal 5a of the AND gate 5 remains "L", and the memory element 4 is not set.
Since the output speed reduction signal 4a is in the "L" state, the car services the first car call without reducing its maximum speed.

In addition, even if the first car call is serviced, there is a second car call, so the car call occurrence detection signal 7a remains "L", and the maximum speed is set even for the second car call. Provide service without deterioration.

When the service for the second car call is completed, there will be no car calls at all, so the car call occurrence detection signal 7a becomes "H", the output signal 5a of the AND gate 5 also becomes "H", and the memory element 4a is set. , the speed reduction signal 4a becomes "H" state. Therefore, from the next run onward, the maximum speed will be lowered and power-saving operation will be performed.

Next, assume that while power-saving operation is being performed, a total of two car calls occur, the first and second car calls, and the car is running at a reduced maximum speed in response to the first car call. do.

Here, when the first to fourth hall calls occur,
Since the total number of calls is six, the usage reduction signal 1a which is the output of the hall and car call counter 1 becomes "L", and the output signal 3a of the NOT gate 3 becomes "H".

However, the car call occurrence detection signal 7a is "L".
Since it remains the same, the output signal 6 of AND gate 6
Since a maintains the "L" state, the memory element 4 is not reset, and the speed reduction command signal 4a maintains the "H" state and service is not provided for the first and second car calls. Let's do it.

When all the first and second car calls are serviced, the car call occurrence detection signal 7a becomes "H".
becomes. Even if the first and second car calls disappear,
Since there are 1st to 4th hall calls, the usage reduction signal 1a is in the "L" state, and the output signal 3a of the NOT gate 3 is also in the "H" state.
The output signal of AND gate 6 becomes "H" state,
The memory element 4 is reset and the speed reduction command signal 4
a becomes "L".

In other words, the first to fourth hall calls can be serviced by canceling the power saving operation without reducing the maximum speed.

In this way, regardless of whether it is a quiet time or a crowded time, once the elevator completes traveling in one direction (upward or downward direction) (responses to the final car call), a state in which there is no car call always occurs. Therefore, power-saving operation may not be canceled while the elevator is traveling in one direction, but when the direction is reversed, the count value of call counter 1 must be at least a predetermined value (4 or more). For example, the output of the AND gate 6 always becomes "H" to reset the memory element 4 and cancel the power saving operation, so that there is no possibility of long-term service deterioration.

In this embodiment, a car call counter is used as a means for detecting the condition that there are no passengers, in order to detect the absence of registered car calls. However, a device for detecting that the car load is zero may also be used, and it is clear that the same effect can be obtained by using a device for detecting that the running direction of the car has been reversed.

As described above, according to the power-saving operation command circuit for the elevator of this invention, power-saving operation is started or canceled when all car calls in a series have been serviced. If the speed is lowered or increased rapidly, the speed will no longer decrease or increase rapidly, and passengers in the car will be left with a misunderstanding or distrust that the elevator is malfunctioning due to changes in running speed, or a feeling of dissatisfaction due to the reduced speed. It is possible to realize power-saving operation without any downtime.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional elevator power saving operation command circuit, and FIG. 2 is a block diagram of this elevator power saving operation command circuit. 1... Hall and car call calculator, 2... Delay circuit, 3... NOT gate, 4... Memory element, 5,
6...AND gate, 7...Car call counter. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims for Utility Model Registration] (1) Count the number of currently registered landings and car calls, and when the counting result is less than or equal to a predetermined value, the output becomes high level, and when it is greater than or equal to the predetermined value, the output is low. A call counter that detects the level, a delay element that operates based on the high level output from the call counter and generates a high level output signal after a predetermined time, and a condition that detects the condition that there are no passengers in the car and the condition that there are no passengers. When the condition that there is no passenger is satisfied, the output is at a high level, and when the condition that there is no passenger is satisfied, the output is at a low level.An output signal when both the output of the delay element and the output of the passenger detection means are at a high level. a memory element that outputs a speed reduction command signal for power-saving operation of the elevator when output from the first logic means; and a memory element that outputs a speed reduction command signal for power-saving operation of the elevator; an elevator power-saving operation command circuit comprising: a second logical means that outputs an output when the call counter is at a high level and the call counter is at a low level to reset the memory element and cancel the power-saving operation of the elevator; . (2) The elevator power-saving operation command circuit according to claim 1, wherein the passenger detection means comprises a car call counter that counts the number of currently registered car calls. . (3) The elevator power-saving operation command circuit according to claim 1, wherein the passenger detection means comprises car load detection means or means for detecting reversal of car operation direction.