JPH0361888A - Earthquake sensor for elevator - Google Patents

Abstract

PURPOSE:To simplify inspecting work by providing a low-seismic-intensity sensor having remotely resetting mechanism and a high-seismic intensity detecting sensor whose locked state is remotely released and working state is remotely released. CONSTITUTION:When a shock wave is generated by the contact of passengers and cargoes to be carried and a microswitch 7 is turned ON by the vibration and the fall of a weight 6 of a low-seismic-intensity detecting sensor 1, a lock- releasing signal 21 is inputted into an electromagnet 19. Since the continuing time of the shock wave is short at this time, the shock wave has disappeared already. In this way, the seismic wave and the artificial shock wave are discriminated, and the occurrence of earthquake is sensed accurately, and the detector is operated with good sensitivity. Therefore, the erroneous control and operation due to the artificial shock wave are not performed. Since the low-seismic- intensity detecting sensor 1 and a high-seismic-intensity sensor 2 are remotely reset after the control and operation caused by the occurrence of the earthquake, the inspecting work by an inspecting person after the earthquake is simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an elevator earthquake sensor, and more particularly to an elevator earthquake sensor that accurately senses earthquakes.

<Conventional technology> When an earthquake occurs, elevators immediately stop service operation, switch to controlled operation, are guided to the nearest floor, stop, and are opened to allow passengers to evacuate outside. Control is necessary to prevent serious accidents.

For this reason, the elevator is equipped with a seismic intensity detection sensor that sensitively detects the occurrence of an earthquake, and the elevator is switched from service operation to controlled operation based on the detection signal of this seismic intensity detection sensor.

<Problems to be Solved by the Invention> In the conventional elevator earthquake detection system described above, if a passenger or the person being transported comes into contact with the seismic intensity detection sensor for some reason, the earthquake may occur even though no earthquake has actually occurred. First, the elevator may be switched to controlled operation based on the detection signal from the seismic intensity detection sensor.

An elevator that has been switched to controlled operation and stopped with its doors open at the nearest floor will be returned to normal service only after a maintenance worker goes to the site, resets the seismic intensity detection sensor, and performs an inspection through maintenance operation. It is not possible to return to driving.

In order to avoid such a situation, the waveform of the detection signal of the seismic intensity detection sensor is analyzed to determine whether it is an earthquake wave or an artificial vibration wave generated by contact with passengers or transported cargo. A method has been proposed in which an analysis device is provided in an elevator, but this method has the disadvantage that the device becomes complicated and the equipment cost increases.

The present invention was made in view of the current state of earthquake sensing in elevators as described above, and its purpose is to accurately detect earthquakes by distinguishing between the occurrence of an earthquake and artificially induced vibrations with a simple structure. The purpose is to provide an earthquake sensor for elevators.

Means for Solving the Problems> In order to achieve the above object, the present invention provides a low seismic intensity detection sensor equipped with a remotely operated reset mechanism, and a low seismic intensity detection sensor that is normally in a locked state. The high seismic intensity detection sensor is configured to be remotely unlocked and put into operation after a predetermined period of time after seismic intensity detection.

<Operation> In the present invention, when an earthquake occurs, the low seismic intensity detection sensor detects it, outputs a detection signal from the low seismic intensity detection sensor, and unlocks the high seismic intensity detection sensor after a predetermined time from this output.

Therefore, when an earthquake occurs, the high seismic intensity detection sensor detects vibrations that continue even after the high seismic intensity detection sensor is unlocked, and control operation of the elevator is performed based on the detection signal. In this case, the low-seismic-intensity detection sensor is reset remotely after a short operating radius time has elapsed, and the high-seismic-intensity detection sensor also enters a locked state and returns to its initial state after a predetermined time has elapsed after activation.

On the other hand, if artificial vibration waves are generated due to contact with passengers or cargo being transported, the duration of these vibration waves is short, so the high seismic intensity detection sensor will lock after a predetermined period of time after the low seismic intensity detection sensor is activated. By the time it is lifted, it has already disappeared,
High seismic intensity detection sensor does not operate. In this case as well, the low seismic intensity detection sensor is reset after a certain period of time has elapsed, and the high seismic intensity detection sensor is also locked, returning to the initial state.

<Example> Hereinafter, an example of the present invention will be described with reference to FIGS. 1 and 2.

Here, FIG. 1 is an explanatory diagram showing the configuration of the main part of the embodiment, and FIGS. 2(a) and 2(b) are characteristic diagrams of seismic waves and artificial shock waves, respectively.

As shown in FIG. 1, the low seismic intensity detection sensor 1 is provided with a permanent magnet 5 to which a weight 6 is attracted and suspended, and a plunger 10 with an excitation electromagnet 9 is provided opposite the weight 6. A lever 8 is attached to this plunger 10 via a spring 4, and this lever 8 is loosely inserted into a weight 6.
A microswitch 7 is arranged below.

The electromagnet 9 and the microswitch 7 are connected to the control device 2.
3, when a vibration exceeding a predetermined level occurs, the weight 6 separates from the permanent magnet 5 and falls. When the electromagnet 9 is excited and the plunger 10 is attracted, the lever 8 returns the weight 6 to its original position. It has become so.

On the other hand, the high seismic intensity detection sensor 2 is provided with a permanent magnet 15 to which a weight 16 is attracted and suspended, and a plunger 20 equipped with an excitation electromagnet 19 facing the weight 16 is provided. A lever 18 is attached via the lever 18, and the lever 18 is loosely inserted into the weight 16, and a microswitch 17 is disposed below the weight.

The electromagnet 19 is connected to the control device 23, and when the electromagnet 19 is energized and the plunger 20 is attracted, the weight, which is normally locked against the permanent magnet 15 by the lever 18, is released from the locked state by the lever 18. It is designed to be attracted and suspended by a permanent magnet 15 so as to be able to vibrate freely.

In addition, in the low seismic intensity detection sensor 1, a short time after the weight 6 falls and the microswitch 7 is turned on,
A reset signal 11 is input from the control device 23 to the electromagnet 9, the plunger 10 is attracted, and the weight 6 is returned to its original position where it is attracted and suspended by the permanent magnet 5 by the lever 8.

Further, after a predetermined period of time has elapsed since the microswitch 7 is turned ON, a lock release signal 21 is sent from the control device 23 to the electromagnet 19.
is input, and the lever 18 locks the minute tR16.
It is designed to be canceled for a predetermined period of time.

Next, the operation of the embodiment will be explained.

As shown in FIG. 2(a), when an earthquake occurs, an initial tremor A with a small vibration acceleration continues, followed by a main vibration B with a large change in vibration acceleration. On the other hand, artificial shock waves caused by passengers or cargo coming into contact with the low seismic intensity detection sensor 1 cause a large change in vibration acceleration, as shown in Figure 2(b), but disappear in a short time. .

When an earthquake occurs, the initial tremor A is detected and the weight 6 shakes, and if the initial tremor A is greater than a predetermined value, the weight 6 falls and the microswitch 7 is turned on, causing the detection signal 1.
3 is input to the control device 23, and the low position signal 12 is input to the elevator management control unit.

When the detection signal 13 is input to the control device 23, the control device 23 sends a lock release signal 21 to the electromagnet 19 after a predetermined time.
is input, the electromagnet 19 is excited, and the plunger 20 is attracted, so the lever 18 moves and the weight 16
will be unlocked.

At this time, since the earthquake vibration continues, the minute tpJ16 vibrates and falls away from the permanent magnet 15, the microswitch 17 is turned on, and the operation signal 22 is input to the elevator management control section. When the operation signal 22 is input to the management control unit, the elevator is switched from service operation to control operation in response to a command signal from the management control unit, guided to the nearest floor, and stopped with the door open.

Therefore, passengers in the elevator can immediately escape from the aircraft, and serious accidents are prevented from occurring.

Note that the plunger 10 is activated by the reset signal 11 issued from the control device 23 after the microswitch 7 is turned on.
is attracted and the weight 6 is returned to its original position where it is attracted and suspended by the permanent magnet 5 by the lever 8, and the lever 8 is again in the released state.

In addition, the weight 16 which has been in the unlocked state for a predetermined period of time due to the lock release signal 21 from the control device 23 is reset to “
When it reaches L'', it returns to its original position where it is locked against the permanent magnet 15.

On the other hand, if a shock wave is generated due to contact with a passenger or a transported load, and the weight 6 of the low seismic intensity detection sensor 1 vibrates and falls, causing the microswitch 7 to turn on, as shown in Figure 2(b), Since the duration of the shock wave is short, by the time the lock release signal 21 is input from the control device 23 to the electromagnet 19 after a predetermined time, the shock wave has already disappeared.

Therefore, even if the lever 18 is moved by the lock release signal 21 and the weight 16 is unlocked, the weight 16 will not vibrate and fall, and the microswitch 17 will send the operation signal 2.
2 is never issued.

In this case as well, when the lock release signal 21 becomes "L", the weight 16 is again locked by the lever 18, and the weight 6 is also returned to its original position by the reset signal 11.

As described above, according to the embodiment, the system distinguishes between seismic waves and artificial shock waves, accurately detects the occurrence of an earthquake, and operates with high sensitivity, so that erroneous control operations due to artificial shock waves will not occur. Further, after the control operation due to the occurrence of an earthquake, the low seismic intensity detection sensor 1 and the high seismic intensity detection sensor 2 are reset remotely, thereby simplifying the post-earthquake inspection work by inspectors.

<Effects of the Invention> As explained in detail above, according to the present invention, the system does not malfunction due to artificial shock waves, operates by accurately detecting the occurrence of an earthquake, reduces inspection work after control operation, An earthquake sensor for an elevator is provided which has a simple structure and reduces installation cost.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the configuration of main parts of an embodiment of the present invention;
FIG. 2(a) is a characteristic diagram of seismic waves, and FIG. 2(b) is a characteristic diagram of artificial shock waves. 1...Low seismic intensity detection sensor, 2...High seismic intensity detection sensor, 5...Permanent magnet, 6...
・Weight, 7...Micro switch, 8...
... Lever, 9 ... Electromagnet, 10 ... Plunger, 11 ... Reset signal, 12 ...
...Low position signal, 13...Detection signal, 15...
...Permanent magnet, 16... Weight, 17...
... Micro switch, 18 ... Lever, 19
...Electromagnet, 20...Plunger, 2 1...Lock release signal, 2...Operation signal, 23...Control device. 23...control device

Claims (1)

[Claims] A low seismic intensity detection sensor is provided with a remotely operated reset mechanism, and is normally in a locked state, and after a predetermined period of time has elapsed after seismic intensity detection by the low seismic intensity detection sensor, the locked state is remotely released and the actuated state is activated. An elevator earthquake sensor characterized by having a high seismic intensity detection sensor.