JPH0462992B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in an earthquake control operation method for elevators.

[Conventional technology and problems]

Generally, when operating an elevator during an earthquake, an earthquake sensor is installed at an appropriate location in the building where the elevator is installed, and the elevator is operated in conjunction with the earthquake sensor to stop the elevator at the nearest floor. is being carried out.

Figure 1 shows an example of a conventional earthquake control operation system.

In Fig. 1, 1 is an earthquake sensor that outputs a signal 1a according to the vibration level, 2 is a preamplifier (AC amplifier) that amplifies the signal 1a, and 3 and 4 are each set to a certain value (for example, Comparators 5 and 6 provided with a set value and a low set value are respectively output circuits and output a signal 5a or 6a, respectively, when the output of the preamplifier 2 is greater than the set value of the comparator 3 or 4. Reference numeral 7 denotes a control operation command device that outputs control operation command signals such as a nearest floor stop command 7a or an operation suspension command 7b in response to a signal 5a or 6a. The above-mentioned special low setting value or low setting value is defined as a setting value of an earthquake sensor in the "Seismic Design and Enforcement Guidelines for Elevators" based on the Building Standards Law Enforcement Ordinance.

In the above configuration, when an earthquake occurs, a signal output from the earthquake sensor 1 becomes a signal 2a amplified by the preamplifier 2, and is input to the comparator 3 or 4, respectively. When the seismic acceleration exceeds the extra-low set value, a signal 5a is input to the control operation command device 7 via the comparator 3 and the output circuit 5, and a nearest floor stop command 7a is output. Furthermore, when the seismic acceleration exceeds the low set value, a signal 6a is similarly input to the control operation command device 7 via the comparator 4 and the output circuit 6, and an operation suspension command 7b is output.

As can be seen from this example, in conventional earthquake control operation, if the detected acceleration of the earthquake sensor does not reach the extra low setting value, normal operation will continue even if an earthquake is occurring. This causes the following inconveniences. This will be explained using FIG.

FIG. 2 shows a general earthquake waveform with time t on the horizontal axis and acceleration a on the vertical axis.

In Fig. 2, L ₁ is the extra low setting value of comparator 3, L ₂ is the low setting value of comparator 4, t ₁ is the time when the car closes the door and starts running, t ₂ is the time when comparator 3 operates, t ₃ indicates the time when the nearest floor has stopped, _t4 indicates the time when the comparator 4 is activated, _T1 indicates the section where the car is stopped at the landing, and _T2 indicates the section where the car is running.

Consider the case where an earthquake as shown in Figure 2 occurs during conventional earthquake control operations. An earthquake has already occurred while the car was stopped at the landing before time t ₁ , but at this point the acceleration detected by the earthquake sensor has not reached the extra-low set value L ₁ , so normal operation will continue. The car starts running if there is a running command from the control device. Afterwards, while the elevator is running, the seismic motion becomes large, and when the vibration level exceeds the special low setting value L ₁ , the elevator enters controlled operation and the car stops at the nearest floor. It is conceivable that the seismic acceleration could become quite large, leaving passengers in a state of anxiety about being crushed until they reach the nearest floor. When the vibration level exceeds the low set value _L2 , the elevator enters the out-of-operation state.

In this way, in conventional earthquake control operations,
Normal operation will continue until the vibration level reaches the extra-low setting, so cars will leave carrying passengers even during an earthquake, putting passengers in an extremely dangerous situation. There was a problem. Furthermore, running the car while swinging has the problem that there is a high possibility that the wire rope will come off the sheave or the car or counterweight will come off the rail.

For this reason, it may be possible to further lower the extra-low setting value, but simply lowering the setting value will not
Even the slightest vibration while the car is running will cause the car to stop at the nearest floor, which improves safety, but at the same time, the car stops more than necessary, reducing operational efficiency and making passengers suspicious. It also gives a feeling.

[Means for solving problems]

In view of the above-mentioned problems, the present invention has been developed by placing emphasis on safety and forcing a running car to stop at the nearest floor more than necessary, which poses psychological problems to passengers and driving efficiency. If it is inside,
This was done noting that even if the start is slightly delayed, there is almost no problem, and its feature is that it detects when vibrations below the extra-low setting value and above a predetermined value have persisted for a predetermined period of time. If a seismic motion below this extra-low set value is detected while the car is stopped, the door opening time will be extended for a certain period of time if the door is open, and if the door is closed, the door will be opened.
The point is that the start of the elevator run is delayed by keeping the door open for a certain period of time.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings. Incidentally, although it is possible to detect vibrations below the extra-low setting value using only the comparator, in the following embodiments, the vibrations are detected only when the vibrations persist to a certain extent. By doing this, it is possible to prevent erroneous detection and to extend the door opening time only when it is expected that the vibration will become large later.

FIG. 3 is a block diagram showing an earthquake control operation system for implementing the present invention, and FIG. 4 is a diagram corresponding to FIG. 2 for explaining the relationship between earthquake waveforms and the operation of the present invention. Components that are the same as those in FIGS. 1 and 2 are designated by the same reference numerals.

In Figures 3 and 4, 8 is an earthquake motion discrimination device for detecting earthquake motions below the extra-low setting value;
9 is an envelope detection circuit that outputs the envelope of the output signal of the preamplifier 2, and 10 is a certain set value below the extra-low set value (a value as low as possible is desirable as long as it does not falsely detect vibrations other than earthquake motions). 11 is a timer that operates for a certain period of time according to the output from the comparator 10, 12 is a timer 11
13 is a comparator provided with a certain set value, 14 is a signal 14a when there are outputs 10a and 13a of the comparators 10 and 13, respectively. The output AND circuit, 7c is the door opening extension command output from the control operation command device 7 by the signal 14a, _L3 is the set value of the comparator 10 provided below the extra low set value _L1 , and _t'1 is the seismic motion determination At the time of operation of the device 8, T' ₁ indicates a normal operation section, and T' ₂ indicates an extended door opening section.

Next, the operation of the above configuration will be explained.

When an earthquake occurs while the car is stopped and the output of the envelope detection circuit 9 exceeds the set value _L3 of the comparator 10, the comparator 10 outputs a signal 10a.
The timer 11 operates for a certain period of time by the signal 10a,
The integration circuit 12 integrates the output of the envelope detection circuit 9 during this time. The output of the integrating circuit 12 is the comparator 1
3, and at this point the output of the envelope detection circuit 9 is equal to or higher than the set value _L3 of the comparator 10, the AND circuit 14 outputs a signal 14a. In other words, the seismic motion discriminator 8 uses the set value L ₃
The signal 14a is output when the acceleration exceeding the threshold continues to some extent and there is a high possibility that the vibration level will reach the extra-low set value or higher. The door opening extension command signal 7c is sent from the control operation command device 7 by the signal 14a.
is output, and when the door is opened, the door remains open for a certain period of time, and when the door is closed, the door is opened and the door remains open for a certain period of time. Therefore, the departure of the car will be delayed for a certain period of time, and during that time the seismic motion will decrease to the set value L ₁
Alternatively, if it exceeds L ₂ , it will switch to the same controlled operation as before, but it is safe because the car has not yet departed. Furthermore, if the set value _L1 is not exceeded within this certain period of time, the door opening extension command is canceled and normal operation is resumed.

In the above explanation, we have explained the case where the acceleration exceeds the set value L ₃ while the car is stopped, but if the acceleration exceeds the set value L ₃ while the car is running, the car may stop immediately at the nearest floor. Although it is possible, as mentioned above, there is a problem with stopping a running car longer than necessary, so the car should first stop in response to a landing call or a car call, and after the door is opened, the door opening time will be extended for a certain period of time. You may also do so. Furthermore, in order to eliminate the sense of suspicion among passengers, a display regarding the occurrence of an earthquake may be displayed at the landing or inside the car when the doors are left open for an extended period of time.

〔Effect of the invention〕

According to the present invention, it is possible to prevent a situation in which a passenger gets into a car during an earthquake, and after the car departs, the vibration level increases and the car enters a controlled operation, which puts the passengers in a dangerous situation. It has a great effect on improving sexual performance.

[Brief explanation of drawings]

Figure 1 is a diagram showing a conventional earthquake control operation system.
Fig. 2 is a diagram showing the relationship between seismic waveforms and conventional control operation, Fig. 3 is a block diagram showing an earthquake control operation device for carrying out the present invention, and Fig. 4 is a diagram showing seismic waveforms and control operation according to the present invention. It is a figure showing the relationship with driving. 1...Earthquake sensor, 2...Preamplifier, 3,
4, 10, 13... Comparator, 5, 6... Output circuit, 7... Control operation command device, 8... Seismic motion discrimination device, 9... Envelope detection circuit, 11... Timer, 12... Integrating circuit , 14...AND circuit.

Claims (1)

[Claims] 1. In the earthquake control operation method in which the building is equipped with an earthquake detector and the elevator is operated under control in the event of an earthquake in conjunction with the earthquake detector, vibrations below the extra-low set value and above a certain level have continued for a specified period of time. 1. A control operation method for an elevator during an earthquake, characterized in that the method comprises: a means for detecting vibration of the same level, and when a vibration of the above level is detected while the car is stopped, the door opening time is extended for a certain period of time.