JPS6124299B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for automatically detecting an abnormal situation within an elevator car.

Conventionally, when a car stops between floors due to an elevator malfunction, passengers turn on a communication device installed on the control panel inside the car to inform the elevator manager or other person that there is an abnormality in the elevator and request rescue. I was waiting. However, in cases where the only passenger in the car is a child who does not know how to use a communication device, the only thing they can do is cry out in anxiety and fear, making it difficult to detect anything abnormal from the outside, and it takes time to rescue the child. . As a result, there have even been cases where children who have given up on rescuing the car break open the car door on their own and fall into the hoistway to their death. In addition, many crimes such as pranks against women occur inside the closed cages, and this has become a major social problem since it is impossible to ask for help from outside unless the above-mentioned communication device is turned on.

As a countermeasure for this, it is generally considered to keep the communication device working all the time, but in this case, the administrator must always pay attention to the conversations inside the car, which can be a huge burden. There were many difficult aspects to making this a reality.

SUMMARY OF THE INVENTION The present invention has been made to overcome the above-mentioned drawbacks, and aims to provide an elevator car abnormality detection device that automatically detects abnormal situations within the car and allows passengers to be rescued quickly.

An embodiment in which the present invention is applied to an elevator in which a manager often leaves the manager's room will be described below with reference to FIGS. 1 and 2.

In the figure, + and - are DC power supplies, 1a and 1b are door fully closed detection contacts that close when the car door is fully closed, 1c is a fully closed door detection contact that also opens, and 2 is a fixed time limit when energized. A timed relay that operates after a period of time has elapsed and returns immediately when it is deenergized. 2a is its normally closed contact, 2b is also a normally open contact, and 3 is installed on the ceiling inside the car to detect the volume of voices, etc. inside the car. 4 is an average noise calculation device that inputs the noise output from the sound level meter 3 and calculates and stores the average noise; 5 is a sound level meter 3 that generates a noise output according to the volume;
The noise output from the sound level meter 3 is compared with the average noise stored in the average noise calculation device 4 in terms of difference, ratio, etc., and only when the noise output from the sound level meter 3 is greater than the above average noise and exceeds the allowable value. A comparison calculation output generation device that generates a detection output, 6 is an amplifier, 7 is an amplifier 6
, 7a is the normally open contact, 8 is the abnormality detection relay, 8a to 8d are the normally open contacts, 9 is the output relay.
Reference numerals a and 9b denote abnormality detection release pushbuttons provided in the manager's room, etc., 10 is an automatic communication device connection relay that automatically connects the communication device to the manager's room, etc. when energized, and 10a is the normal connection relay. Open contact, 11 is a communication device release push button provided in the manager's room, 12
When energized, the nearest floor emergency stop relay stops the car to the nearest floor, and when 13 is energized, it rings a notification bell in the manager's room that becomes louder over time, and alerts the car to the nearest floor. 14 is a notification bell stop button provided in the manager's room, 15 is a notification bell stop relay, 15a is its normally open contact, 15
Similarly, b is a normally closed contact, and 16 is a door that operates immediately when it is energized, returns after a certain period of time when it is deenergized, and when this operates, it extends the opening time of the door at the nearest floor where the emergency stop occurred compared to normal. This is a time relay for extending the opening time, and 16a is its normally open contact.

Next, the operation of this embodiment will be explained.

When the passenger boarding is completed and the car door is fully closed, the door fully closed detection contacts 1a and 1b are closed, the time relay 2 is energized, and the noise meter 3 is also driven.
It detects noise inside the car and starts generating noise output. In this case, the timed relay contact 2a does not open within a certain time period, and the contact 2b similarly does not close, so the noise output from the sound level meter 3 is input to the average noise calculation device 4, where the average noise within this time period is Calculate the noise and store it. After the time limit, the contact 2a is opened and the contact 2b is closed, so the noise output is input to the comparison calculation output generation device 5, where it is compared with the average noise stored in the average noise calculation device 4.
At this time, when the noise output generated by the sound level meter 3 has an abnormally large difference or ratio from the average noise due to screams, cries, etc., a detection output is generated. Then, this detection output is amplified by an amplifier 6,
Output relay 7 is energized and contact 7a is closed.
Here, the abnormality detection relay 8 is energized by the circuit +-1b-7a-8-- and is self-held by closing the contact 8a, thereby registering the occurrence of an abnormal situation within the car. In other words, as you can see from the above explanation, this abnormality detection circuit compares the noise that remains shortly after the door is closed with the noise that follows, and detects an abnormality when an abnormally loud noise such as a scream or scream is emitted. It is something to detect. Therefore, even if the background noise inside the car changes suddenly, such as when a large number of children get in the car, reliable detection without malfunction is guaranteed.

Next, the contact 8b is activated by the abnormality detection relay 8.
~8d is also closed, and the communication device automatic connection relay 10,
Nearest floor emergency stop relay 12, notification relay 13
All of the time relays 16 and 16 are energized, and the bell in the manager's room rings to notify the manager, and if the car is running, it makes an emergency stop to the nearest floor to rescue passengers. In this case, if the manager responds immediately and presses the notification bell stop push button 14, the notification bell stop relay 15 is energized and self-holds by closing the contact 15a. Since the contact 15b remains open, the notification relay 13 is deenergized and the bell etc. stop ringing. Since the communication device automatic connection relay 10 is self-maintained by closing the contact 10a, and the communication device is automatically connected, it is possible to ask passengers about the situation inside the car. If the reason for detecting the abnormality is that there is no problem, such as there being no abnormality in the basket and the child simply crying out loud, the administrator can press the abnormality detection cancellation button 9a.
By pressing 9b, the abnormality detection relay 8 and the communication device automatic connection relay 10 are deenergized, and the contact 8a
~8d is open. Therefore, other relay 1
2, 15, and 16 are also deenergized, returning to the normal state. However, if it is discovered that there is an abnormality in the car or inside the car, rescue operations can be carried out immediately. In addition, if the manager is away from the location where the alarm bell is installed, such as in the manager's room, or is out of the house, and cannot immediately detect an abnormality, the sound of the alarm bell may become louder over time. It becomes possible to notify the manager or other person of an abnormality, and to wait for rescue even if the car stops between floors. However, if the failure is not related to an elevator failure, the car will make an emergency stop at the nearest floor. In this case, when the car door opens, the door closed detection contact 1b opens, the abnormality detection relay 8 is deenergized, and the contact 8a,
~8d are opened, and everything other than the communication device automatic connection relay 10 is deenergized. However, even after the time relay 16 is deenergized, the contact 16a remains closed for a certain period of time, and the door fully closed detection contact 1c is closed during that time, so the +-1
6a-1c-16- - held in the circuit. As a result, the door opening time on the emergency stop floor is extended, making it easier for passengers to escape on their own. When the set time has passed and the car door is fully closed again, the door fully closed detection contact 1c is opened and the time relay 16 is deenergized. Further, the door fully closed detection contacts 1a and 1b are closed, and the noise inside the car is detected again. However, even in this case, the communication device automatic connection relay 10 remains energized and continues to transmit the conversation inside the car to the manager's room, so when the manager returns later, he knows that there is an abnormality. The inside of the car can be inspected. If the manager presses the telephone device release push button 11, the telephone automatic connection relay 10 is deenergized and everything returns to normal.

FIG. 2 shows another embodiment of the invention, and FIG. 1 is used as is. This is the case when applied to an elevator where a manager is always present and can reliably respond to abnormalities within the car.

In this example, the manager checks for abnormalities in the basket,
Unless the abnormality detection release pushbutton 9a in the manager's room is pressed, the train will not start again while stopping at the nearest floor.

In each of the above embodiments, although it is not shown as a circuit, if an abnormality detection device inside the car is activated while the car is running, a warning bell separately installed inside the car will ring to prevent a crime or an emergency stop will be activated. On the floor, when it is decided that the car will stop, it is also possible to ring a notification bell installed at the landing, etc., to call people around and rescue the passengers inside the car.

As explained above, in this invention, the noise inside the car immediately after the car door closes is detected in the form of noise, this is stored, this is compared with the noise inside the car after that, and the subsequent noise is stored. If the noise is louder than the noise level, an abnormality signal is issued, so passengers in the car can be rescued quickly, and malfunctions due to errors in background noise settings can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a noise detection circuit diagram showing one embodiment of the elevator car abnormality detection device according to the present invention, FIG. 2 is a control circuit diagram, and FIG. 3 is another embodiment of the elevator car abnormality detection device according to the present invention. This is a circuit diagram showing an example and corresponds to FIG. 2. 1a to 1c... Door fully closed detection contact, 2... Timed relay, 3... Sound level meter, 4... Average noise calculation device,
5...Comparison calculation output generator, 6...Amplifier, 7
...Output relay, 8...Abnormality detection relay. In addition,
Identical parts in the figures are indicated by the same reference numerals.

Claims (1)

[Claims] 1. A sound level meter installed in the car that emits an output corresponding to the noise inside the car, an average noise calculation device that stores the output of the sound level meter immediately after the car door closes, and an output of this average noise calculation device. and a comparison calculation output generation device that compares the output of the sound level meter after the above-mentioned time point and generates an abnormal signal when the output of the noise meter is greater than the output of the average noise calculation device by a predetermined tolerance value or more. An abnormality detection device in the elevator car.