JPS6326069B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an elevator system that stops a car due to an earthquake and resumes operation by detecting the presence or absence of an abnormality.

Elevators are installed and operated in buildings. Therefore, depending on the scale of the earthquake, damage is inevitable. According to past damage records, even in areas with the same seismic intensity, the damage is not that great, and the extent of the damage varies, with some elevators able to resume operation immediately after the incident, and others unable to operate.

In response to this situation, a seismic sensor is installed to detect earthquakes of a specified strength or higher, and when this seismic sensor is activated, the car is stopped at the nearest floor or stopped immediately, and then The system uses a method of restarting operation after inspecting for abnormalities, that is, seismic control operation.

By the way, due to the wide-area nature of earthquakes, many elevators stop due to the occurrence of an earthquake.
Inspections of elevators that have stopped in this manner are carried out by experts, and the number of experts is limited. For this reason, it usually takes a long time to resume operation after an earthquake occurs.

On the other hand, elevators are an essential means of transportation, especially in skyscrapers and high-rise apartment buildings, and they have the disadvantage that prolonged stoppage times can seriously impede people's activities.

This invention was made in view of the above-mentioned problems, and was made by trial running a car that had stopped due to an earthquake.
The purpose is to detect the presence or absence of damage caused by an earthquake from the vibrations or running noises generated at that time, and to quickly restore elevators that can return to normal operation so that people's activities are not hindered. be.

FIGS. 1 and 2 show an embodiment of the present invention.

First, in FIG. 1, 1 is a hoistway wall, 2 is a pair of weight rails fixed to the hoistway wall 1 at predetermined positions and erected, and 3 is this weight rail 2.
A lifting platform weight 5 is movably engaged via a weight guide shoe 4, and reference numeral 5 indicates this lifting platform weight 3.
6 is a pair of car rails fixed to a predetermined position on the hoistway wall 1 and erected; 7 is a main rope that slides onto the car rail 6 via a car guide shoe 8; With a movably engaged cage,
A hoisting machine (not shown) is connected to the other end of the main rope 5.
It is suspended in a hanging manner from the suspension weight 3 via. 9 is a machine room located at the top of the building, 10
is a control panel installed upright in the machine room 9, which controls the operation of the car 7. 11 is a seismic sensor installed in the machine room 9, which is activated when the machine room 9 vibrates beyond a predetermined value due to an earthquake, and sends a signal to the control panel 1.
This is input to 0. Reference numeral 12 denotes a bridge piece whose both ends are fixed to the tops of a pair of weight rails 2, and 13 is a detector consisting of a vibration sensor attached to this bridge piece 13 to control the vibration of the weight rails 2. This is what is conveyed to board 8.

FIG. 2 shows details of the control panel 8 shown in FIG. 1,
In the figure, 21 is a well-known earthquake control operation device that stops the car 7 at the nearest floor based on a signal from the seismic sensor 11, and 22 is a device that is activated a predetermined time after the car 7 stops at the nearest floor. A test run device for reciprocating the car 7 between the top floor and the bottom floor; 23 is a switch that switches the output line from the vibration sensor 13 when the car 7 is tested; 24 is a switch that switches the output line from the vibration sensor 13; Vibration signal α from vibration sensor 13 during normal operation
is input, and a normal operation vibration storage device 25 stores the maximum value signal α ₀ ; 25 is a vibration signal α from the vibration sensor 13 which is activated during the test run and is switched by a switch 23 and input; A comparator that compares the maximum value signal α ₀ stored in the normal operation vibration storage device 24 with 1.1 times the maximum value signal α 0 and outputs the first signal when the vibration signal α>maximum value signal α ₀ ×1.1. When α≦maximum value signal α ₀ ×1.1, the second signal is output. 26
Reference numeral 27 indicates an operation prevention device that prevents the car 7 from operating in response to the first signal of the comparator 25, and a normal operation command that returns the car 7 to normal operation in response to the second signal of the comparator 25. It is a device.

In the elevator system configured as described above, when the car 7 is in normal operation, vibration is mainly generated by sliding between the weight guide shoe 4 and the weight rail 2, and this vibration is detected by the vibration sensor. A signal indicated by the symbol A in FIG. 3 is inputted to the normal operation vibration storage device 24 through the device 3. Then, the maximum value signal α ₀ at time t ₀ shown in FIG. 3 is stored.

Suppose now that an earthquake occurs, the seismic sensor 11 is activated, and the car 7 is stopped at the nearest floor by the earthquake control operation device 21. Passengers are guided to exit car 7, and car 7 comes to a stop with the door closed while it remains empty. When a predetermined time, which is the normal time required for an earthquake to subside, has elapsed, the trial run device 22 is activated and the empty car 7 is operated. Vibrations generated during this trial run are detected by the vibration sensor 13 and input to the comparator 25 via the switch 23. As shown by the symbol C in _FIG .
If the maximum value signal α indicated by symbol B exceeds 1.1 times ₀ , it is determined that some kind of trouble has occurred in the lifting and lowering of the suspension weight 3, and the comparator 25 outputs the first signal and the operation is started. The blocking device 26 is activated and stops the car 7.

On the other hand, if the vibration signal α during the test run is less than 1.1 times the maximum value signal α ₀ , as shown by the symbol D in FIG. The second signal is output from the elevator 25, the normal operation command device 27 is activated, and the elevator returns to normal operation.

According to the above embodiment, once the time until the earthquake subsides, the car 7 is put into test operation, and the presence or absence of damage caused by the earthquake is determined based on the magnitude of the vibration at that time. It is possible to investigate whether there is any damage to the elevator in an extremely short period of time and restore it to normal operation. Furthermore, since the investigation is conducted by actually driving, safety is high after normal operation is resumed.

In the above embodiment, the vibration sensor 13 is used as a detector, but it can also have the same function as a device that detects the sound that accompanies lifting and lowering.

In addition to the weight rail 2, there is also a car rail 6.
If detectors are installed at locations such as earthquakes and other locations where damage is feared due to earthquakes, more reliable damage investigations can be conducted.

As mentioned above, the invention of this application relates to a system for returning an elevator to a normal operating state after it has stopped temporarily due to an earthquake, by storing vibrations, etc. during normal operation, and using this memorized value and the car of the stopped elevator. Compare the vibrations, etc. during a trial run of the car, and if the latter (vibrations, etc. during the trial run) exceeds the former (vibrations, etc. during normal operation), the operation of the car will be stopped, and if it falls below, the car will be prevented from operating. This is to return the elevator to normal operation.

However, the safety of elevators after an earthquake occurs is a problem when the engagement and arrangement of equipment is impaired and mutual interference occurs. In such cases, the presence or absence of mutual interference can be easily detected from vibrations and sounds.

Therefore, according to the invention of this application, it is possible to return the elevator to normal operation with high safety after an earthquake.

Furthermore, if the vibration or the like is large enough to prevent the elevator from operating, the problem can be easily found from the car's stopping position.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention, in which FIG. 1 is a vertical sectional view of a hoistway, FIG. 2 is a block diagram showing a part of the circuit of the control panel shown in FIG.
FIG. 3 is an explanatory diagram. In the figure, 2 is a weight rail, 6 is a car rail, 7 is a car, 11 is a vibration sensor, 13 is a vibration sensor (detection device), 22 is a test run device, 24 is a normal operation vibration storage device (memory device) ), 25 is a comparator,
27 is a normal operation command device. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] 1. A test run device for test running a car that has been stopped due to an earthquake, a detection device for detecting vibrations or running noises emitted as the car runs, a storage device for storing detection signals from the detection device during normal operation, and this memory. A comparator that compares the memory value of the device with the detection signal of the detection device during the test run, and when the result of the comparison by this comparator shows that the detection signal during the test run exceeds the memory value, the car is operated. An elevator system comprising: an operation prevention device for inhibiting operation; and a normal operation command device for returning the operation of the car to normal when the detection signal during the test run falls below the stored value.