JPH05246641A - Emergency operating device for elevator at power failure time - Google Patents

Abstract

PURPOSE:To extensively reduce restless feeding and uneasy feeling of passengers in a cage by furnishing a low speed driving means that returning driving speed is lower than rated speed at the time of carrying out rescue returning driving of a plural number of elevators by a private power generating source at the time of power failure and a simultaneous returning driving means of all the elevators. CONSTITUTION:The number of elevators is to be four and explanation is made about No.1 elevator 3A. When a commercial electric power source is failed and all the elevators stop midway between floors and thereafter a private power generation source is established, normally open contact points M1a, M1b and M1c of a relay close and a relay R1 is turned on. Accordingly, a normally open contact point R1a is closed and a start command is given to each of the elevators by each of low speed command circuits 19 through each of start command circuits 16, and all the elevators are simultaneously started and come into return driving at low speed. In the meantime, after the elevators return in sequence with the nearest one first in accordance with distance to returning floors and all passengers confined to the elevators get out as doors open after returning, the doors close and the return driving is completed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a control operation device for an elevator during a power failure.

[0002]

2. Description of the Related Art A private power generation facility (hereinafter referred to as "private power supply") is generally expensive and therefore does not have a capacity to simultaneously activate all elevators. Therefore, in the event of a power failure, the capacity of the private power source is commensurate1
Starting from two elevators in sequence, they were used to evacuate to the floor (hereinafter referred to as the "return floor") that should be evacuated to rescue passengers in the car.

The configuration of a conventional example will be described with reference to FIGS. 7 and 8. 7 and 8 are shown in, for example, JP-A-57-27.
FIG. 8 is a diagram showing a conventional elevator power failure control operation device disclosed in Japanese Patent No. 880, FIG. 7 shows a case where all four elevators are provided, and FIG. 8 shows a configuration of one elevator. ing.

In FIG. 7, NO. 1 elevator 3,
NO. 2 elevator 4, NO. 3 elevator 5 and NO. 4 The elevator 6 is connected to the private power source 1 via the normally open contact EMRa of the private power supply contactor EMR.
The commercial power supply contactor NOR is connected to the commercial power supply (power purchase power supply) 2 via a normally open contact NORa.

Further, the private power source 1 is provided with a contactor EM.
Relays M1, M2, M3, and M4 that are turned on at the time of supplying the self-generated power are connected through an R normally open contact EMRb. On the other hand, the commercial power source 2 is turned on (O when the commercial power source is supplied through the normally open contact NORb of the contactor NOR).
N) relays N1, N2, N3 and N4 are connected.

A contactor EMR for supplying power from a private power source
Is connected to the private power source 1 through the normally closed contact NORc of the contactor NOR, and the contactor NOR for supplying commercial power is supplied.
Is connected to the commercial power supply 2 through the normally closed contact EMRc of the contactor EMR. Therefore, an electrical interlock is provided so that the private power supply contactor EMR and the commercial power supply contactor NOR do not turn on at the same time.

In FIG. 8, the NO. 1 elevator 3 is generally an elevator operation control circuit 7 for performing operation control from starting to stopping of the elevator, an induction motor 8 driven by this elevator operation control circuit 7, and a hoisting machine rotationally driven by this induction motor 8. Of the sheave 9 and the car 1 connected to both ends of the main rope 10
1, having a counterweight 12.

Further, a control circuit power source 13 connected to both power sources 1 and 2, a start command circuit 16 connected to the control circuit power source 13 through a plus side power source line 14 and a minus side power source line 15 to give a start command, The start command circuit 16 has a rated speed command circuit 17 for giving a running command at a rated speed and a designated floor return command circuit 18 for giving a return command to a floor to be evacuated.

Further, the normally open contact M1a of the relay M1 is inserted in the power supply line 14, and the timer T1 is connected to both the power supply lines 14 and 1.
5, the normally open contact T1a of the timer T1 and the series circuit of the relay R1 are similarly connected between both power supply lines 14 and 15. The normally open contact N1 of the relay N1 is provided between the power supply line 14 and the start command circuit 16 which sandwich the normally open contact M1a.
a and the normally open contact R1a of the relay R1 are inserted in parallel. A normally open contact M1b of the relay M1 is inserted between the start command circuit 16 and the designated floor return command circuit 18.

Incidentally, NO. 2 from the elevator. Four
The structure of the elevator is NO. It has the same structure as one elevator.

Next, the operation of the above-mentioned conventional example will be described with reference to FIG. FIG. 9 is a timing chart showing an operation of the conventional elevator control operation device during a power failure. The same figure (a)-(d) represents the return driving | operation operation | movement of each elevator.

When the commercial power supply 2 fails and all elevators stop between the floors on the intermediate floors, and then the private power supply 1 is established, the normally open contacts M1a to M4a (N) of the relays M1 to M4 are established.
O. Contacts and the like corresponding to 2 to 4 elevators are not shown. ) Is closed, and timers T1 to T4 start counting for a limited time. Each timer is set to a time sufficient for the elevator to which the start command is given prior to the elevator to complete the return.

Therefore, first, when the timer T1 completes counting for a predetermined time and is turned on and the normally open contact T1a is closed,
The relay R1 turns on. As a result, the normally open contact R1a is closed, and the rated speed command circuit 17 passes through the start command circuit 16.
NO. A start command is given to one elevator, and a return command is given from the designated floor return command circuit 18.
Enter the return operation at the rated speed of the elevator and return to the designated return floor. After returning, the doors of the elevator were opened and the passengers trapped inside got off, and then the doors closed. This state is shown in FIG.

After that, when a predetermined time elapses, NO. 2 The timer T2 of the elevator completes counting for the set predetermined time period and is turned on. As shown in FIG. 9B, this closes the normally open contact T2a and turns on the relay R2.
NO. 2 Start command is given to the elevator. Less than,
Similarly, as shown in FIGS. 9C and 9D, N
O. 3 and NO. 4 The start command is given to the elevators, and the return operation of all elevators is completed.

In the above-mentioned conventional example, the case where the number of elevators subject to the control operation at the time of power failure is 4 has been explained. However, in a large-scale building, the number of elevators is large, and the number of elevators subject to the control operation at the time of power failure is 8 as well. There are many cases where it becomes a degree.

[0016]

In the conventional elevator power failure control operation device for an elevator as described above, the return operation is sequentially performed for each unit in accordance with a predetermined order of the units, and after the power failure, the private power source is used. Since it takes about 1 minute to establish, the rescue operation time until the return operation of all elevators is completed is considerably long, and eventually the passengers of the elevator after the set order is confined in the car for a long time. Therefore, there was a problem that the feeling of anxiety and anxiety became more and more felt.

The present invention has been made in order to solve the above-mentioned problems, and it is possible to shorten the rescue operation time when performing a control operation during a power failure by a private power source, and to make it possible to average out the elevator as a whole. The purpose is to obtain a control operation device during a power failure.

[0018]

An elevator power failure control operation device according to claim 1 of the present invention is provided with the following means. [1] Low speed control means for controlling the return operation speed to a speed lower than the rated speed of the elevator when performing rescue / return operation of a plurality of elevators by a private power source during a power failure. [2] Simultaneous return operation means that causes all elevators to perform the return operation at the same time during the power outage.

An elevator power failure control operation device according to a second aspect of the present invention is provided with the following means. [1] Low speed control means for controlling the return operation speed to a speed lower than the rated speed of the elevator when performing rescue / return operation of a plurality of elevators by a private power source during a power failure. [2] Simultaneous return operation means for performing the return operation all at once by shifting the start-up time of all elevators in the event of the power failure.

[0020]

In the elevator power failure control operation device according to claim 1 of the present invention, by the low speed control means,
When a plurality of elevators are rescued / returned by a private power source during a power failure, the return operation speed is controlled to be lower than the rated speed of the elevators. In addition, the simultaneous return operation means causes all elevators to return to the operation at the same time during the power failure.

In the elevator power failure control operation device according to the second aspect of the present invention, when the plurality of elevators are rescued / returned by the private power source at the time of power failure by the low speed control means, the return operation speed of the elevators is the same. The speed is controlled to be lower than the rated speed. Also, by means of the simultaneous return operation means, all elevators will
The start-up time is staggered and the passengers are simultaneously driven to return.

[0022]

【Example】

Example 1. The configuration of the first embodiment of the present invention will be described with reference to FIGS. 1 is a diagram showing a first embodiment of the present invention. 1 elevator 3A-NO. Except for the 4 elevator 6A elevator, it is exactly the same as that of the conventional device described above. In addition, FIG. 2 shows the NO. It is a figure which shows 1 elevator. In the drawings, the same reference numerals indicate the same or corresponding parts.

In FIG. 2, the NO. 1 elevator 3A has timer T1, normally open contact T
In addition to the configuration of the conventional device except 1a, the start command circuit 16
A low speed command circuit 19 is provided between the elevator operation control circuit 7 and the elevator operation control circuit 7. Between the low speed command circuit 19 and the start command circuit 16, the normally open contact M1 of the relay M1 shown in FIG.
c is inserted. NO. The low speed command circuit 19 of the 1 elevator 3A sets the speed during the control operation to, for example, 20 m / m.
In, the speed is controlled to a low speed, and similarly, NO. 2 to NO. The low speed command circuit of the 4 elevator is also controlled to a low speed of 20 m / min.

By the way, the low speed control means of the present invention according to claim 1 is the relays M1 to M4, the normally open contacts M1a to M4a, and the relays R1 to R in the first embodiment of the present invention described above.
4, normally open contacts R1a to R4a, start command circuits 16, normally open contacts M1c to M4c, and low speed command circuits 19. Further, the simultaneous return operation means of the present invention,
In the first embodiment, relays M1 to M4 and normally open contacts M1a to M4.
a, relays R1 to R4, normally open contacts R1a to R4a, start command circuits 16, normally open contacts M1b to M4b, and designated floor return command circuits 18.

Next, the operation of the above-described first embodiment will be described with reference to FIGS. 3 and 4. FIG. 3 is a diagram showing the relationship between the car speed and the required power according to the first embodiment of the present invention, and FIG. 4 is a timing chart showing the operation of the first embodiment of the present invention. In FIG. 3, (a) shows a change in car speed, and (b) shows a change in required power. In FIG. 4, (a) to (d)
Represents the return operation of each elevator.

Qualitatively, the required electric power P (kw) at the rated speed when the elevator is loaded with the rated load is expressed as follows. However, K is a constant, L is a rated load load (kg), V is a rated speed (m / min), and H ₀ is a hoistway loss (kw).

P = K · L · V + H ₀ Equation 1

Since the hoistway loss H ₀ is generally small, it can be approximately expressed as follows.

P≈K · L · V Equation 2

During the control operation by the private power source, the return floor is generally the designated floor, so the position where the elevator stops between floors may be below the return floor due to a power failure. Considering that the load in the car is also the rated load, the capacity of the private power source required to return one elevator is usually based on the required power P (kw) expressed by the above-mentioned equation 2. Selected. In reality, the acceleration current during elevator acceleration is larger than the constant speed current, so this is taken into consideration.

Therefore, the above-described conventional control operation device using a private power source does not have the ability to return to a plurality of units at the same time if the capacity of the private power source is, for example, one unit. There is.

The first embodiment of the present invention focuses on this required power. Speed during control operation is 20m /
If the speed is suppressed to a low speed of about min, for example, the rated speed of 105
In the case of an elevator of m / min, the required electric power per unit is about ⅕, so if this is taken into consideration, the number of units that can be operated simultaneously can be increased.

FIG. 3 shows the relationship with the required power when the operating speed is changed. In FIG. 3, the solid line and the alternate long and short dash line respectively represent changes in the rated speed and the low speed when the rated load rises, and corresponding changes in the required power.

In the first embodiment of the present invention, there are four elevators and the rated speed is 105 m / min. When the commercial power supply 2 fails and all elevators stop between floors, and then the private power supply 1 is established, the normally open contacts M1a to M4a, M1b to M4b and M1c to M of the relays M1 to M4 are established.
4c is closed and relays R1 to R4 are turned on. As a result, the normally open contacts R1a to R4a are closed, and each start command circuit 1
6, each low speed command circuit 19 gives a start command to each elevator, and each designated floor return command circuit 1
A return command is given from 8, and all the cars are activated at once to start the return operation at low speed. Then, as shown in FIGS. 4 (a) to 4 (d), the passengers are returned in ascending order according to the distance to the return floor,
After returning, the elevator doors will be opened and passengers who have been trapped will exit, then the doors will be closed, and the return operation will be completed.

In the conventional example, the return operation is carried out one by one, and after stopping at the return floor, the passengers are closed and the door is closed (after returning, it takes about 10 seconds until the door is closed and completed). There was a sequential control operation such as entering the return operation of the next unit. Therefore, the rescue time of the last elevator was long, and the more the number of vehicles, the more remarkable.

The first embodiment of the present invention, as described above,
Although it is a low speed, the return operation is carried out all at once, so that the rescue operation time can be shortened and the entire operation can be averaged. That is, by reducing the car speed during control operation to a low speed and reducing the required electric power per elevator, all the target elevators are started at the same time and the return operation is performed. By keeping the car speed low,
Increase the number of elevators that can be operated simultaneously,
The above-mentioned effects are produced.

Example 2. The configuration of the second embodiment of the present invention will be described with reference to FIG. FIG. 5 shows the NO. It is a figure which shows 1 elevator 3B, and is the same as that of Example 1 except having added the timer and its normally open contact as it demonstrates later.

In FIG. 5, the timer S1 is a power line 14,
A series circuit of the normally open contact S1a of the timer S1 and the relay R1 is connected between the power lines 14 and 15 as well.

The timers S1 to S4 are connected to the normally open contacts M1a to M1a, respectively.
When M4a is closed, counting is started, and the M4a is turned on after a predetermined time set in advance to slightly shift the start timing during the control operation. Specifically, so that there is a time difference every 2 seconds to clear the acceleration time,
The values of the timers S1 to S4 are set to 0 seconds, 2 seconds, 4 seconds, and 6 seconds.

By the way, the low speed control means of the present invention according to claim 2 is the relays M1 to M4, the normally open contacts M1a to M4a, and the timers S1 to S in the second embodiment of the present invention described above.
4, normally open contacts S1a to S4a, relays R1 to R4, normally open contacts R1a to R4a, start command circuits 16, normally open contacts M
1c to M4c and each low speed command circuit 19. Further, the simultaneous return operation means of the present invention is the same as the second embodiment.
Then, relays M1 to M4, normally open contacts M1a to M4a, timers S1 to S4, normally open contacts S1a to S4a, relays R1 to
R4, normally open contacts R1a to R4a, each start command circuit 16,
Normally open contacts M1b to M4b and each designated floor return command circuit 18
It consists of

Next, the operation of the above-described second embodiment will be described with reference to FIG. FIG. 6 is a timing chart showing the operation of the second embodiment of the present invention. Same figure (a) ~
(D) shows the return operation of each elevator.

When the commercial power supply 2 fails and the privately-generated power supply 1 is established, the normally open contacts M1a to M4a of the relays M1 to M4.
Closes. Then, NO. The timer S1 of 1 elevator starts counting, but since the timer value is set to 0 seconds, the timer immediately turns on, the normally open contact S1a closes, the relay R1 turns on, and the normally open contact R1a closes. First, NO. 1 Elevator 3B enters the return operation at low speed.

NO. 2 seconds after the elevator 1B is activated, the NO. 2 elevator timer S2 is turned on, normally open contact S2a is closed, relay R2 is turned on,
NO. 2 Elevator 4B enters the return operation at low speed.
In the same manner, the numbers of NO. 3, NO. Four
The elevators 5B and 6B will enter the return operation at low speed. This is shown in FIG.

This series of operations shifts the time zone during which the accelerating current flows at the time of startup, and since the accelerating currents do not overlap, the overall required power can be reduced. This can be an effective means for operating all of them at once when the number of control operations is large.

The second embodiment of the present invention, as described above,
When starting and accelerating an elevator, the required electric power is usually larger than that at a constant speed. Therefore, the start timing should be delayed by a fixed time (about 2 seconds during the acceleration time) so that multiple elevators The peak of the required electric power at the time of the return operation is suppressed.

Although each of the above-described embodiments shows the case of four elevators, the same can be applied to the case of, for example, eight or more elevators. Further, the elevator speed during control operation can be set arbitrarily in consideration of the number of elevators, and is not limited to the speed described in each embodiment. That is, the operating speed for maintaining an elevator is generally 20 to 30 m /
Since it is min, the elevator speed during control operation can be easily set to the maintenance operation speed. Furthermore, in the case of an elevator using a VVVF control inverter, which is becoming mainstream, the elevator speed during control operation can be set to an arbitrary speed by changing the speed command value.

In the conventional example, if a failure occurs in the elevator car selection circuit (return order determination circuit) for sequentially returning, or if the return elevator fails, at worst, then another elevator scheduled to return is selected. However, in the case of each of the embodiments, the above problems are eliminated because they are collectively returned.

Further, in the case of the conventional example, since the worst case is the ascending operation (and the rated speed) when the rated load is loaded, it is necessary to absolutely consider the capacity of the required privately-generated power source. In each of the embodiments, the capacity of the required privately-generated power source can be made smaller than that of the conventional example by operating at a low speed and giving a group of elevators all at once a return command.

That is, when considering the load in the car (large and small), position (whether inter-floor stop or normal landing) and direction of return operation (up or down) at the time of power failure of a group of elevators stochastically, Although it depends on the number of units, it is considered that the number can be substantially reduced to about 1/2 if it is about 4 to 8 units, which has a great merit that the cost of expensive private power generation can be significantly reduced. If the capacities of the privately-owned power sources supplied are the same, the return operation speed can be increased and the rescue time can be further shortened by taking the above into consideration.

[0050]

As described above, the elevator power failure control operation device according to claim 1 of the present invention, when a plurality of elevators are rescued / returned by the private power source in the event of a power failure, the return operation speed of the elevators is set. Equipped with low speed control means to control speeds lower than the rated speed and simultaneous return operation means to perform return operation to all elevators at the same time in case of power failure, so rescue at the time of power failure control operation by private power source As a result, the driving time can be shortened, the averaging can be performed as a whole, and the passengers' feelings of anxiety and anxiety in the car can be significantly reduced.

As described above, in the elevator power failure control operation device according to claim 2 of the present invention, when a plurality of elevators are rescued / returned by the private power source during a power failure, the return operation speed is set to the elevator rated speed. Since a low speed control means for controlling to a lower speed and a simultaneous return operation means for performing a return operation at the same time by shifting the start time of all elevators at the time of the power outage are provided, a control operation during a power failure by a private power source is performed. In this case, the rescue operation time can be shortened and averaged as a whole, and since the acceleration current does not overlap, the overall power requirement can be reduced, which in turn greatly reduces the passengers' feeling of frustration and anxiety in the car. There is an effect that can be done.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a first embodiment of the present invention.

FIG. 2 shows the NO. It is a figure which shows the structure of 1 elevator.

FIG. 3 is a diagram showing a relationship between car speed and required power according to the first embodiment of the present invention.

FIG. 4 is a timing chart showing the operation of the first embodiment of the present invention.

FIG. 5 shows the NO. It is a figure which shows the structure of 1 elevator.

FIG. 6 is a timing chart showing the operation of the second embodiment of the present invention.

FIG. 7 is a diagram showing a configuration of a conventional elevator control operation device during a power failure.

[Fig. 8] N of conventional control operation device for elevator during power failure
O. It is a figure which shows the structure of 1 elevator.

FIG. 9 is a timing chart showing the operation of the conventional elevator control operation device during a power failure.

[Explanation of symbols]

 1 Private power source 2 Commercial power source 3A to 6A Elevator 3B Elevator 7 Elevator operation control circuit 16 Start command circuit 18 Designated floor return command circuit 19 Low speed command circuit M1 to M4 Relay M1a, M1b, M1c Relay M1 normally open contact R1 relay R1a Relay R1 normally open contact

Claims (2)

[Claims] 1. A low speed control means for controlling the return operation speed to a speed lower than the rated speed of the elevator when performing rescue and return operation of a plurality of elevators by a self-generated power source during a power failure, and all the elevators at the same time during the power failure. An elevator power failure control operation device comprising a simultaneous return operation means for performing a return operation. 2. A low speed control means for controlling the return operation speed to a speed lower than the rated speed of the elevator when performing rescue / return operation of a plurality of elevators by a self-generated power source at the time of power failure, and at the time of starting all elevators at the time of the power failure. An elevator power failure control operation device equipped with simultaneous return operation means for shifting the return operation all at once.