JPS6320752B2 - - Google Patents

Description

[Detailed description of the invention]

[Field of Application of the Invention] The present invention relates to a control operation device for controlling elevator operation during an earthquake. [Background of the Invention] It is extremely important to prevent disasters in elevators during earthquakes and to restore the elevators to normal operation as soon as possible. For this reason, many buildings are equipped with seismographs for controlling elevator operation. I'm getting used to it. This seismograph for elevator control operation is generally installed in the machine room of an elevator on the top floor of a building or in the shaft of an elevator on the bottom floor, and the acceleration of the floor is set to a certain standard value, for example, seismic intensity 4. When the maximum limit of 80 gal is exceeded, a signal is generated and a controlled operation is carried out, such as stopping the elevator in progress at the nearest floor. However, especially in skyscrapers, if an earthquake occurs in a remote location, even if the seismic intensity is as small as 1,
Since the frequency approaches the natural frequency of the building, it may vibrate with a large amplitude and cause a disaster.

[Purpose of the invention]

The present invention was achieved by solving the above-mentioned phenomenon, and its purpose is to provide an elevator control operation device that can prevent elevator disasters due to various vibrations caused by earthquakes. [Summary of the Invention] The present invention is characterized by detecting vibration acceleration of a building caused by an earthquake, integrating this acceleration and converting it into velocity, and when this velocity exceeds a predetermined value,
Or, further integrate the velocity and convert it to displacement,
The system is configured to generate a controlled operation command when this displacement exceeds a predetermined value. [Embodiment of the Invention] FIG. 2 shows an embodiment of the present invention. In the figure, 11 is an earthquake acceleration detector, 12,
13 is an integrator, 14, 15, 16 are comparators, 1
7, 18, and 19 are the outputs of the comparators, respectively. The output of the seismic acceleration detector 11 is sent to a comparator 14,
A comparison is made with a certain reference value, for example 80 gal, and if the acceleration is greater than that, a control operation command output is generated at the terminal 17. On the other hand, the output of the seismic acceleration detector 11 is
2 and convert it to velocity. Comparator 15
For example, if the speed is 0.05 m/s or more, a control signal is output to the terminal 18. Further, the output of the integrator 12 is further integrated by an integrator 13 and converted into displacement. This is compared with the comparator 16, and if the displacement is 50 mm or more, the terminal 19
Outputs control operation commands. This seismometer not only can detect earthquakes with high acceleration such as direct earthquakes, but also properly detect and control earthquakes like previous elevator pipe seismometers, as well as Even if the acceleration is small, the frequency is as low as 0.1 to 0.2 Hz, so even if an earthquake occurs in a remote location, such as the one that resonates with the natural frequency of a skyscraper and causes a large displacement, it can be properly detected and controlled. It can generate signals and prevent disasters. However, if the earthquake occurs at a medium distance and the frequency is around 1 Hz, the natural frequency of the mid-rise building will resonate, potentially causing serious disasters such as counterweights coming off the rails. In the case of a frequency of this order, as can be seen from equation (2) above, the speed increases. For example, in the case of an earthquake of 1 Hz and 60 gal, no control signal is generated based on acceleration, and the displacement d is also d = 0.6/40 ² = 0.015 m, so there is no control signal from the perspective of displacement, but there is no control signal from the perspective of velocity. , 0.6/2π≒0.1m/s, and a control operation command is generated. Therefore, according to this seismograph, even during the above-mentioned earthquake, a control signal is emitted from the terminal 18 and the elevator is operated under control, so that the acceleration and displacement of the building do not reach the predetermined values. In this case, if it is determined that the excitation speed is such that it resonates with the building's natural frequency and causes the building to vibrate greatly, the elevator control operation is carried out before the building vibrates significantly due to this excitation speed. Disasters such as those described above can be prevented. FIG. 3 is a diagram showing an example of an elevator control operation operation according to the present invention. As mentioned above, even if the acceleration is small, the displacement may become large, but it may be too late to detect it after the displacement becomes large. In such cases, the method of detecting the speed and generating the control signal can generate the control signal a little earlier than the method of generating the control signal by displacement, as shown in the figure, and can minimize the disaster. [Effects of the Invention] According to the present invention, a condition signal that causes the building to shake significantly in response to various vibrations caused by an earthquake is detected, and an elevator control operation command is issued before the building shakes significantly and the elevator is activated. Since it is now possible to carry out controlled operation of the elevator, it is effective in ensuring sufficient safety of the elevator even against various vibrations during an earthquake.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an elevator hoistway, FIG. 2 is an embodiment of an elevator control operation command unit according to the present invention, and FIG. 3 is an explanatory diagram of the operation of an embodiment of the present invention. 1...Building, 2...Elevator machine room, 3...
...Elevator car, 5...Seismograph, 11...
Earthquake acceleration detector.

Claims (1)

[Scope of Claims] 1. In an elevator controlled operation during an earthquake, a detector for detecting vibration acceleration of a building caused by an earthquake, a means for integrating this acceleration and converting it into a speed, and a means for converting this acceleration to a predetermined value. A control operation device for an elevator, comprising means for commanding the control operation when the limit exceeds the limit. 2. In the case of controlled operation of elevators during an earthquake, a detector for detecting the vibration acceleration of the building caused by the earthquake, a means for integrating this acceleration and converting it into velocity, and a means for integrating this velocity and converting it into displacement. , and means for commanding the controlled operation when the displacement exceeds a predetermined value.