JPS617183A - Group control operation method of elevator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an elevator control operation method, and particularly to an elevator control operation method suitable for operating an elevator safely during an earthquake.

[Background of the invention]

Conventionally, control operation of elevators during an earthquake has been carried out at an excitation frequency of 0.1 to 5 Hz, as shown in Figure 1.
When the vibration acceleration exceeds, for example, 80 gat, the elevator is stopped at the nearest floor.

However, in recent years, as buildings have become taller and more flexible, even small excitation forces below the specified acceleration can cause the buildings to resonate.
Problems have also occurred in which the tail cord, which controls signal transmission between the elevator car and the machine room, swings violently and gets caught on protrusions inside the elevator tower, such as counterweights, causing the tail cord to break.

(In this case, a seismometer that detects seismic waves of more than s o gat will not work.) [Object of the Invention] The object of the present invention is to develop an earthquake sensor suitable for buildings with flexible structures such as skyscrapers, where the top of the building has a large displacement. To provide a controlled driving method.

[Summary of the invention]

The key point of the present invention is to detect the displacement of the top of the building using a displacement detector, and to perform controlled operation such as reducing or stopping the speed of the elevator before the tail cord gets caught on a protrusion inside the elevator tower. It's about making it happen.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to FIGS. 2 to 4.

FIG. 2 is a diagram showing the overall structure of the elevator and the installation location of the displacement detector of the present invention. 1 is a high-rise building, 2 is an elevator car installed in this high-rise building 1, 3 is a counterbalance, 4 is a main rope, 5 is a winding machine, 6 is a diversion wheel,
7 is compensation rope, 8 is boo! J, 9.10 are respectively,
A buffer for the car and the balance weight υ, 11 a tail cord for transmitting signals from the car to the machine room, 12 an elevator control panel, and 13 a displacement detector.

FIG. 3 is a circuit diagram illustrating the function of the displacement detector 13 explained in FIG. 2. Numeral 13-1 is a sensor for detecting acceleration, for example, a servo-type acceleration sensor. 13-2 is the 10a divider and its output becomes the speed. 13-3 is a second integrator, and its output becomes a value indicating displacement.

13-4 and 13-5 are comparators, and the positive displacement is compared with the comparator 13-4, and the negative displacement is compared with the comparator 13-5, respectively, with a prescribed reference value.

13-6 is a variable resistor for creating a reference voltage, and the voltage 1 is the reference value. 13-7 is a sign inverter which inverts the sign of the previous voltage V and uses it as a reference value for the comparator 13-5. 13-8 are comparators 13-4, . A transistor that amplifies the output of 13-5, and a diode 13-9.
．． 13-10. 13-11
is a resistor that limits the base current of transistor 13-8,
13-12 is the coil of the output relay of this displacement detector, 13
-13 is its flywheel diode.

As can be seen from this circuit, when there is a specified V and a larger displacement (absolute value), the comparator 13-4 or 13-5 operates, the transistor 13-8 turns on, and the relay 13-1
2 turns on.

FIG. 4 is a flowchart showing the earthquake control operation method for an elevator according to the present invention. Even if an earthquake occurs, if the displacement of the building is small and the acceleration is below a predetermined level, the building will continue to operate. The frequency of the earthquake matches the natural frequency of the building, the top of the building shakes greatly, and the first specified value of the displacement sensor,
For example, if the length exceeds 30 mm, the tail cord and compensation rope will begin to swing and there is a possibility that they will get caught on a protrusion inside the elevator tower, making it extremely dangerous to continue operating the elevator at high speed. Therefore, even if the vehicle should get caught on these protrusions, the impact will be small and the speed will be reduced to a low level that does not pose a danger to passengers in the corners. This is possible if the input of the elevator speed command is suppressed by the output relay of the displacement sensor. The reason for reducing the speed is that rather than stopping the elevator completely, the tail cord sways less and passenger service can continue. (
When the elevator moves up and down, the bending point of the tail cord changes up and down, and the vibration frequency of the tail cord also changes accordingly, making it difficult for resonance to occur and reducing lateral vibration. ) If the displacement does not become larger than the first set point, continue the low-speed operation service, and check with a timer that a predetermined time (for example, - minutes) has passed since the displacement has fallen below the first set point; Return to normal operation (speed) by following the flow.

Next, the earthquake becomes even larger, and the second displacement detection setting value (
For example, if the earthquake exceeds 5 Qmm), it is dangerous to continue operating the elevator any longer, and the elevator is stopped at the nearest floor according to the flow shown in FIG. 4 and is kept on standby until the earthquake subsides.

When the earthquake subsides and the value becomes less than the second displacement detection setting value, and this state continues for a predetermined period of time (e.g., 10 minutes, the time for the tail cord to stop rolling), the first displacement detection setting value mentioned earlier will be changed. Return to flow and return to normal operation.

This elevator seismic control operation method can accurately detect large lateral shakes in skyscrapers, which could not be detected by conventional methods that detect earthquake acceleration and perform control operation at or above a predetermined acceleration. It is now possible to have the robot control the elevator.

The actual seismic control operation method uses, in addition to the displacement control operation method, a conventional method of detecting acceleration (force) to stop the elevator.

[Brief explanation of drawings]

Fig. 1 is a conventional earthquake control operation detection area diagram, Fig. 2 is an overall configuration diagram of an elevator, Fig. 3 is an operation circuit diagram of a displacement detector, and Fig. 4 is a diagram of the elevator displacement control operation method of the present invention. It is a flowchart.

Claims (1)

[Claims] 1. In a control operation method for controlling an elevator by detecting the amount of displacement in the horizontal direction of a building, the operating speed of the elevator is reduced upon detecting that the amount of displacement exceeds a predetermined value. and further comprising detecting that the amount of displacement exceeds a second predetermined value and causing the elevator to stop at the nearest floor.