JPS6169678A - Elevator device - 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 system, and particularly to an elevator system that performs abnormality detection operation to reliably detect abnormalities in an elevator during an earthquake and prevent secondary disasters. This article relates to an elevator system suitable for.

[Background of the invention]

In recent years, there has been particular social interest in measures to prevent disasters during earthquakes, and various measures have been implemented not only in public facilities but also in individual households.

Elevators are no exception to this; the Enforcement Order of the Building Standards Act was revised on July 14, 1981, and new regulations were established regarding the earthquake resistance of elevators.
For example, measures have been taken to prevent elevator cars and counterweight guide devices from falling off the rails, and the earthquake resistance of elevators has been enhanced.

Along with this, various methods are being used to consider the safety of users regarding the operation of elevators during earthquakes. The conventional method of operating an elevator during an earthquake is to install a seismograph at an appropriate location in the building where the elevator is installed, and when this seismograph is activated due to an earthquake, the elevator must be stopped immediately or the elevator must be moved to the nearest location. The plan was to stop the train on the ground floor and stop operation after letting off passengers.

However, in order to restore an elevator that has gone into hibernation due to this operating method, a specialized elevator engineer must reset the seismograph and inspect each part of the elevator for abnormalities. Therefore, due to the number of specialized elevator engineers, it will take a long time to restore the 2V elevators in the entire earthquake area to normal conditions. As a result, building users experience great inconvenience until the elevators are restored, and building managers are increasingly demanding improvements in how elevators operate during earthquakes.

In response to this, an earthquake operation system for elevators was proposed as shown in the flowchart of FIG.

This is based on the classification of earthquakes into low-level earthquakes, which are thought to be less likely to cause problems with elevator equipment, and high-level earthquakes, which are thought to have a higher risk of causing problems with each equipment. Two seismometers, each set to a high level, are installed in the building, and if only the low level seismometer is activated, the elevator car is stopped at the nearest floor (step person 1 to A4), and a constant After a certain amount of time has elapsed, that is, after the earthquake has ended, the elevator is automatically returned to normal operation via a timer or the like (steps A5 to A7).
), and if the high-level seismometer also operates, the elevator is immediately stopped and operation is suspended (steps A3 and A8).

In the case of a low-level earthquake, elevators are stopped at the nearest floor so as not to cause anxiety to passengers, and then normal operation is resumed after the earthquake ends, resulting in a decline in elevator service. This can be said to be an effective driving method.

However, regarding the operation of high-level earthquakes, there are the following shortcomings that should be improved. In other words, if a high-level seismometer is activated, the elevator will immediately stop and enter a dormant state, so passengers in the elevator car will be
Once the earthquake is over, a professional engineer arrives at the building, operates the elevator manually, and must spend an anxious time inside the car until it lands on the nearest floor. By the way, as mentioned above, the number of specialized engineers is limited, and the time that passengers spend in the car may be long, and the anxiety of the passengers during that time is immeasurable. In addition, some of these passengers may not be able to bear the anxiety and may cause secondary disasters such as falling into the elevator tower while trying to escape from the car.

Furthermore, even if only low-level seismometers were activated, a study of past accidents reveals the following drawbacks. In other words, the low-level seismograph is set at a sufficiently low value that no damage will occur to the equipment in the elevator, and no specific damage to the equipment (such as bending or cutting) will occur. For example, an elevator
Long suspended objects suspended inside the elevator tower, such as control wiring connecting the car and machine room and governor ropes, and protrusions inside the elevator tower (brackets for guide rails, entrance/exit components, etc.) ) may become stuck. At this time, if the elevator restarts automatically without any inspection, the control wiring may be cut, or the elevator may become unable to operate due to the governor's lobe getting caught, resulting in secondary damage. It may cause severe damage.

[Purpose of the invention]

The present invention has been made in view of the above, and its purpose is to perform abnormality detection operation so as to reliably detect abnormalities in elevators during earthquakes and prevent the occurrence of secondary disasters. The objective is to provide an elevator system that can

[Summary of the invention]

A feature of the present invention is that it is equipped with two seismometers with different sensing levels or one seismometer with a plurality of different sensing levels, and even if this seismometer detects an earthquake higher than any of the sensing levels, the elevator is turned off. nearest floor stopping means for immediately stopping the elevator at the nearest floor; confirmation operation means for operating the elevator after a predetermined period of time to confirm abnormality detection when the seismometer detects only an earthquake at a lower detection level; A normal operation recovery means for returning the elevator to normal operation when no abnormality is detected in the confirmation operation, and when the seismometer detects an earthquake at a higher detection level and when an abnormality is detected in the confirmation operation. and an operation stop means for stopping the operation of the elevator.

[Embodiments of the invention]

The present invention will be explained in detail below using the embodiments shown in FIGS. 2 to 4.

FIG. 2 is a flowchart illustrating an embodiment of an elevator operation method during an earthquake in the elevator system of the present invention. As with conventional seismometers, two types of seismometers are required to detect low-level and high-level earthquakes.

Low-level seismometers include those on the Japan Meteorological Agency seismic intensity scale of 3 to 4 (hereinafter referred to as seismic intensity);
As a high-level seismometer, it is preferable to use one that can detect horizontal seismic motions with a seismic intensity of about 4 to 5. Note that a single seismometer that satisfies both conditions may be used. When an earthquake occurs and the low-level seismograph or high-level seismograph operates (steps Bl and B2), the elevator
automatically enters control operation during an earthquake, and if the elevator is running, the elevator car is immediately stopped at the nearest floor (
Step B3. B4).

From this point on, a timer starts and begins measuring the time the car has been waiting. The optimal setting time for the timer is the time until the earthquake ends, but since this is not possible, it is set to about 3 to 10 minutes based on past data.

The door of the car stopped at the nearest floor is opened, and after the passenger gets off, the door is closed and the car waits for the time set by the timer (steps B5 to B7).

The reason why we adopted the same operation method regardless of whether a low-level seismograph operates or a high-level seismograph is that, as in the past, when a high-level seismograph operates, the elevator The purpose of this idea is to eliminate the drawbacks of the driving method that stops the - on the spot.The background of this idea is as follows.

First, the earthquake resistance of elevators has been strengthened due to the revision of the Building Standards Act Enforcement Ordinance, and an earthquake with a seismic intensity of 5 or less will not cause harmful damage that could lead to personal injury, such as counterweights falling off the rails. Therefore, the safety of the passengers inside the car can be sufficiently guaranteed when the car is operated to land the car on the nearest floor.

Second, as is clear from the experience of the Miyagi oil earthquake that occurred in June 1973, when an earthquake near the upper limit of seismic intensity 5 occurs, the power transmission end f, L-J□ to the elevator: /'
The elevator will stop unconditionally due to the operation of the existing safety device specified in the Enforcement Ordinance of the Building Standards Act at II Ken++-1 and Ga-1; In the event of a major earthquake reaching a seismic intensity of 6, elevators will immediately stop due to power outage and safety equipment activation, so it is not very meaningful for elevators to be stopped at the same time as the earthquake due to control operations. The point is that there is no.

Next, once the timer set time has passed, work begins to confirm whether or not the elevator can return to normal operation.One of the checks is to determine whether the high-level seismograph has been activated. If yes (step B8) and the high-level seismograph is operating, the elevator operation is suspended (step B9), and its return is made after the inspection work by the elevator specialist engineer is completed. This is because when a high-level earthquake occurs, phenomena that are harmful to elevator operation, such as bent guide rails or caught control wiring, often occur, and the elevator is automatically operated as it is. Since there are many problems to restore the train, if the train is stopped at the nearest floor and the passengers are dropped off, it will be put into a state of suspension of operation. There is no problem.

If the high-level seismograph is not operating, perform an abnormality detection check operation of the elevator and check whether the abnormality detection device installed in the main part of the elevator to detect abnormalities caused by earthquakes is operating (step B10) If none of the abnormality detection devices are operating, the elevator is automatically returned to normal operation (step B11), and if any abnormality detection device is operating, the elevator is suspended.

FIG. 3 shows an embodiment of the electric circuit of the elevator system of the present invention for realizing the above-mentioned operation method. According to the circuit configuration shown in FIG. 3, for example, when a low-level earthquake occurs and the contacts of the low-level seismometer are closed, the low-level earthquake sensing link-L is energized, and the relay L is normally activated. Open contact L
1 is closed, deceleration command relay (8D) is energized, a deceleration command is given to a control circuit (not shown), and the elevator is decelerated to land at the nearest floor. At the same time, the normally open contact Lz of relay L is closed. is closed, the timer T is activated, and after a preset predetermined time elapses, the timer T is turned on, the time-limited operation contact T1 of the timer T is closed, the low-level seismometer reset relay R is energized, and the low-level seismometer reset relay R is energized. A reset command is given to the reset circuit (not shown) of the level seismometer, and the low level seismometer is reset.At the same time, the elevator is checked by a confirmation operation control circuit (not shown) to see if it can return to normal operation. Move on to driving.

On the other hand, the main part of the elevator is equipped with an abnormality detection device for detecting abnormalities caused by earthquakes as described above. There are abnormality detection devices for long suspended objects such as tail cords, and these normally closed contacts El
zE, are connected in series as shown in the figure, and if any abnormality is detected during check operation, the normally closed contacts E1 to
E.

Since the corresponding normally closed contact EI is opened, the abnormality detection relay E is energized, and the elevator is suspended for that time by a control circuit (not shown).

When a high-level earthquake occurs, the contact H1 of the high-level seismometer is closed, so the high-level earthquake detection relay H is energized, and the normally open contact H1 of the relay H is closed, and when a low-level earthquake occurs, the high-level earthquake detection relay H is energized. As before, the deceleration command IJL/-8D is activated, and the V-Beta is decelerated and lands on the nearest floor. However, at the same time, the normally closed contact H2 of the relay H is opened, so the timer T is not activated, the time-limited contact TI of the timer T remains open, and the low-level seismometer reset relay R is energized. Nothing happened, and the elevator remained out of service.

According to the embodiment described above, if the seismometer operates during an earthquake, the car will land on the nearest floor, so the passengers in the car can be reliably evacuated to the nearest floor. In the case of a major earthquake, the system automatically returns to normal operation after performing a check operation to check the status of the abnormality detection device installed in the main part of the elevator. It is possible to prevent the occurrence of secondary disasters caused by accidents.

FIG. 4 is a flowchart showing an example of a confirmation operation for abnormality detection. This confirmation operation can be divided into the following three stages. The first step is to check whether abnormal displacement of the elevating body has been detected before actually running the elevator and checking for abnormalities (step CI
). This is because if the elevating object is abnormally displaced, the guide rail for the elevating object is often deformed, and running the elevator for confirmation runs the risk of inducing secondary disasters. Therefore, it is necessary to do this.

The second step is to automatically operate the elevator at low speed (step C2). Items to be checked at this time include checking whether long suspended objects such as the control wiring connecting the car and the machine room and the speed governor rope are caught on any protrusions inside the elevator tower. is the main one (step C3).

This is necessary because if high-speed operation is performed immediately when there is an abnormality such as a long suspended object being caught, there is a risk of increasing damage to the elevator and other equipment.

The third stage is a stage in which the elevator operates at high speed and stops at each floor (step C4). At this time, the elevator is
In addition to checking the high-speed performance, the basic performance of the elevator, such as the opening/closing status of the doors, is checked (step C5). and,
If there is an abnormality in these, for example, if the relay in the operation control circuit is damaged or the opening/closing state of the relay is malfunctioning, the elevator will stop running using the legally mandated safety switch that already exists in the elevator. , operations will be suspended.

If no abnormalities are found in the first to third stage check operations, the elevator is automatically returned to normal operation (step C6).

According to such a confirmation operation method, it is possible to reliably detect abnormalities in the elevator during an earthquake to prevent secondary disasters from occurring.

〔Effect of the invention〕

As explained above, according to the present invention, passengers in the car can be reliably evacuated to the nearest floor in the event of an earthquake.
Furthermore, abnormality in the elevator during an earthquake can be reliably detected, and there is an effect that the occurrence of secondary disasters can be prevented.

[Brief explanation of drawings]

Fig. 1 is a flowchart of a conventional elevator operation method during an earthquake, Fig. 2 is a flowchart showing an example of an outline of an elevator operation method during an earthquake in the elevator system of the present invention, and Fig. 3 is a flowchart of the present invention. FIG. 4 is a circuit diagram showing an embodiment of an electric circuit for realizing the operation method shown in FIG. 2 of the elevator system of the invention, and FIG. It is a flowchart which shows. L...Contact point of low level seismometer, H...Contact point of high level seismometer, L...Low level earthquake detection relay,
SD...Deceleration command relay, T...Timer, R...
・Low level seismometer reset) IJ flow El-E-・・
・Normally closed contact of abnormality detection device, ER...Abnormality detection relay, H...High level earthquake detection relay.

Claims (1)

[Claims] 1. Equipped with two seismometers with different sensing levels or one seismometer with a plurality of different sensing levels, and when the seismometer detects an earthquake of which sensing level or higher, it immediately a nearest floor stopping means for stopping the elevator at the nearest floor; a confirmation operation means for operating the elevator to confirm abnormality detection after a predetermined period of time when the seismometer detects only an earthquake with a lower detection level; normal operation return means for returning the elevator to normal operation when no abnormality is detected in the confirmation operation, and when the seismometer also detects an earthquake with a higher detection level and when an abnormality is detected in the confirmation operation; An elevator device comprising: an operation suspension means for suspending operation of the elevator. 2. The confirmation operation means checks for abnormal displacement of the elevating body, and if no abnormality is detected, operates the elevator at a low speed, and if no abnormality is detected even in the low speed operation, operates the elevator at a high speed. The elevator system according to claim 1, wherein the elevator system is configured to detect the presence or absence of an abnormality by stopping and operating each floor.