JPS6236957B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for preventing crimes using elevators.

Conventionally, there has been no appropriate means for preventing criminal acts such as violence inside an elevator car, and the only thing that has been done is to simply provide an emergency button inside the car. However, in such cases, it is not always possible for the victim to press the emergency button, and this has not been sufficient to prevent such violent acts.

By the way, passengers in an elevator car usually move slowly, but in abnormal situations caused by violent acts, passengers move rapidly.We have recently developed an applicant for a device that prevents crimes by detecting this. has filed numerous applications. As examples of the first and second examples, for example, Japanese Patent Application No. 55-178524 (Japanese Patent Application No. 57-102481)
No.) ``Elevator car abnormality detection device'' and patent application
56-10997 (Japanese Unexamined Patent Publication No. 57-125496) "Situation Detection Device". In other words, these devices use a spatial filter or the principle of a spatial filter to detect changes in the spatial distribution of brightness, and when each of these changes exceeds a predetermined value, it is considered that an abnormality has occurred, and the elevator is stopped at the nearest floor. This system is designed to ensure the safety of passengers by issuing warnings. However, these systems convert the luminance spatial distribution into an electrical signal, and if the frequency or amplitude level of this electrical signal exceeds a predetermined value, it is considered that an abnormality has occurred. It is not possible to determine whether there is an abnormality or not, and therefore the determination of whether it is an abnormality or not is a selective one. There is a risk of causing inconvenience to residents. From the perspective of crime prevention, too much sounding of alarm systems can actually have a negative effect. Furthermore, in recent years, intelligent crimes have been increasing day by day, such as people with criminal intentions getting on top of the elevator car, freely operating the elevator, and attempting to steal cash while it is being transported. It is no longer possible to prevent crimes only by detecting abnormalities in elevator cars.

The present invention has been developed in view of these points, and it determines changes in the brightness spatial distribution in more detail to determine the type and degree of abnormality in the car, selects the most appropriate treatment accordingly, and provides caution to passengers. The purpose of the present invention is to provide a device that prevents a crime from occurring by quickly giving a warning to a person intending to commit a crime.

The present invention will be explained below with reference to the drawings.

1 and 2 are block diagrams showing one embodiment of the present invention. In the figure, 1 is a device for detecting the spatial distribution of luminance within an elevator car, and 1a is its output signal. The device 1 for detecting this luminance spatial distribution is composed of, for example, a wide solid angle prism 2, a lens 3, a photoelectric element 4, etc., and the details thereof are explained in the aforementioned Japanese Patent Application No. 55-178524, etc. The explanation will be omitted here. Reference numeral 5 designates an AC amplifier, whose output signal 5a has a direct current component removed, and is obtained as a signal corresponding to the movement of an object within the field of view of the wide solid angle prism 2. 6 is a DC amplifier, and its output signal 6a has a voltage corresponding to the illuminance within the field of view of the wide solid angle prism 2. 7 is a bandpass filter that removes unnecessary signal components, and 8 is a sensitivity corrector that changes the degree of amplification according to the signal 6a depending on the illuminance, and keeps the output signal 8a substantially constant regardless of changes in the illuminance. Reference numeral 9 denotes an abnormality determination device that detects the type and degree of abnormality in the car based on the signal 8a and outputs a corresponding signal; 10 uses the signal 8a as a characteristic signal 10a to detect the frequency, amplitude, rate of change, etc. of the signal 8a; This is a feature detector that outputs, consisting of a comparator, a differentiation circuit, and a waveform shaper. 11 is the feature signal 10a
This is a motion discriminator that determines the degree of movement of people or objects in the car, and if the movement is slight, signal 11a is output.
If the value is medium, the signal 11b is output, and if the value is large, the signal 11c is output. Note that the degree of movement can be easily determined by detecting the frequency of the feature signal 10a. 12 is the feature signal 10a
This is a knife discriminator that detects knives more easily, and outputs a signal 12a when the duration of the knife detection signal is short, and outputs a signal 12b when the duration of the knife detection signal continues for a predetermined time. 13 is an out-of-level detection device that emits an output signal 13a when the elevator stops outside the opening zone of a floor door; 14;
15 is a door open detection device that emits an output signal 14a when the elevator car door is opened, 15 is an emergency door open detection device that emits an output signal 15a when the emergency exit on the elevator car is opened, and 21 to 24 are OR gates, respectively. , 25 and 26 are AND gates, 27 is a car bell, 28 is a landing bell, 29 is a notification device for the manager's room, and 30 is a notification device that activates a well-known automatic dialing device (not shown) to report to the police station. The device 31 is a nearest floor stopping device that stops the car at the nearest floor and opens the car door.

The operation of the apparatus of the present invention will be explained below.

First, when a person intending to commit a crime gets into an elevator car just before the elevator car door closes and commits a violent act against the passengers inside the car, when a violent act is about to occur inside the car, the brightness spatial distribution inside the car is The output signal 1a from the device 1 for detecting has a waveform different from the normal one, and unnecessary noise components are removed from this through the AC amplifier 5, the band filter 7, and the sensitivity corrector 8, and the abnormality is determined as the signal 8a. It is input into the device 9.

In the abnormality determination device 9, the characteristic detector 10 converts the input signal 8a into a pulse signal according to the frequency and amplitude of the characteristic signal 10a and outputs the signal, but the discriminators 11 and 12 detect the type of abnormality in the car. It determines the degree and outputs a signal accordingly. Depending on the type and degree of the abnormality, the selection circuit selects the most appropriate treatment to ensure the safety of passengers. For example, if the movement of a person or a part of the human body becomes faster than normal in the car, it will be detected by the discriminator 11 in the abnormality determination device, and if the movement is slight, the signal 11 will be detected.
a is output to operate the car bell 27 via the OR gate 21, and operate the nearest floor stopping device 31 via the OR gate 24 to stop the elevator car at the nearest floor. Therefore, if the discriminator 11 is activated due to a criminal act, the passenger should be able to escape from the car while the criminal is startled by the sound of the buzzer.

However, if the movement is mild, it does not necessarily mean that a violent act has occurred, so we will limit ourselves to the measures described above.

Next, if the movement is moderate, there is a strong possibility that a violent act has occurred, so the discriminator 11 uses the signal 11.
output b, pass through the OR gate 22, and ring the hall bell 2.
8 and the manager's room are activated, and the volume of the car bell 27 is increased. If the movement is even more intense, a serious abnormal situation may occur, so the discriminator 11 outputs a signal 11c, activates the police station reporting device 30 via the OR gate 23, and reports to the police. In the event that a cutlery or metal piece is taken out of the car for more than a predetermined time, it will be detected by the cutlery discriminator 12 regardless of the presence or absence of the output signal of the discriminator 11, and by emitting the signal 12b, the cutlery or metal piece will be removed from the car all at once. 27, Hall bell 2
8. Activate the notification device 29 to the manager's room and the notification device 30 to the police station, and also activate the stop device 3 on the nearest floor.
1 causes the elevator car to stop at the nearest floor.

FIG. 3 is a block diagram showing details of one embodiment of the knife discriminator 12. Detection of a knife detects a sudden increase in light intensity due to uneven light reflection. In FIG. 3, 41 is a frequency detection circuit which outputs a signal 41a if the frequency of the signal 10a is higher than a predetermined value. 45 and 46 are level comparators, and the level of 45 is set higher than that of 46. 45a is an inverter, 47 is
It is an AND gate, so its output 47a is asserted when signal 10a is within a certain level range. 48 is an AND gate, and its output 22a
is emitted if the frequency of the signal 10a is above a predetermined value and within a certain level range. If the range of this level is selected appropriately, it will be possible to distinguish it from the movement of a person and to detect that a knife has been taken out. A differential comparator 42 rectifies and differentiates the signal 10a (differentiating the envelope of the signal waveform), and outputs a signal 42a when the differential value of the waveform exceeds a certain level. 43 is a time comparator. For example, if the comparator is set to 5 seconds, a signal 43a is output when the duration of the signal 10a reaches 5 seconds. 49 is an AND gate. Therefore, when it is detected that a cutlery has been removed from the basket, a signal 12a is output, and if this state continues for a predetermined period of time or more, a signal 12b is output.

Next, we will discuss a case where a person intending to commit a crime gets into a car, operates an elevator, and commits a criminal act.

First, a person intending to commit a crime stops the car outside the level, opens the car door or the emergency exit on the car, and tries to enter the car. However, when the car stops outside the level, the out-of-level detection device 13 Since the signal 13a is emitted and the car bell 27 is activated via the OR gate 21, the passengers in the car are alerted, and those intending to commit a crime are motivated to stop their criminal activities. influence. However, if the criminal tries to open the car door further and enter the car, the door open detection device 14 is activated and the signal 14a is emitted, so the AND gate 25 and
The hall bell 28 and the notification device 29 for the manager are activated via the OR gate 22, and the volume of the car bell 27 is increased. Furthermore, if the criminal tries to open the emergency exit and enter the car, the emergency door open detection device 15 is activated and a signal 15a is sent via the OR gate 22 to the hall bell 28 and the manager in the same manner as described above. The notification device 29 is activated and the volume of the car bell 27 is increased. Furthermore, if the criminal enters the car, takes out a knife, etc. even momentarily and threatens the passengers, the notification device 30 to the police station is activated via the AND gate 26 and OR gate 23, and the authorities are dispatched. It is a request.

Incidentally, when an elevator stops outside the level, it is not only due to a criminal act, but also due to a power outage or failure of the control device, but a report to the police station cannot be issued unless the knife detector 12 is activated. Because it is familiar, unnecessary confusion can be avoided.

Furthermore, if a passenger tries to open the car door and escape on his or her own when the car stops outside the level due to a power outage or the like, the volume of the bell above the car will increase, alerting the passenger to caution.

As described above, according to the present invention, it is possible to prevent all kinds of crimes using elevators, and to arrest criminals at an early stage. It is also effective in preventing passengers from falling in the event of an accident.

[Brief explanation of the drawing]

FIGS. 1 and 2 are block diagrams showing an embodiment of an elevator security device according to the present invention, and FIG. 3 is a block diagram showing an embodiment of a knife discriminator. DESCRIPTION OF SYMBOLS 1... Device for detecting brightness spatial distribution, 5... AC amplifier, 6... DC amplifier, 9... Abnormality determination device, 11... Movement discriminator, 12... Blade discriminator,
13... Out-of-level detection device, 14... Door open detection device, 15... Emergency door open detection device, 27... Car top bell, 28... Landing bell, 29... Notification device to manager's room, 30 ...Notification device to the police station, 31
...Nearest floor stopping device.

Claims (1)

[Claims] 1. Detecting the spatial distribution of brightness within the elevator car,
a device that outputs a signal according to the luminance spatial distribution; and a device that outputs a first signal when a cutlery or metal piece in the basket is detected for a predetermined time or longer using the signal according to the luminance spatial distribution; a knife discriminator that outputs a second signal when the cutter discriminator outputs the first signal; and when the knife discriminator outputs the first signal, an alarm is issued or the elevator is stopped at the nearest floor; An emergency door opening device that detects when the emergency exit on the elevator car is opened, or a door open detection device that detects that the car door is opened, and an out-of-level detection device that detects that the elevator car has stopped outside the level. and if an abnormal state occurs in which the emergency door open detection device detects the opening of an emergency exit or the out-of-level detection device detects an out-of-level stop of the elevator car, and the door open detection device detects the opening of a car door. If this occurs, an alarm will be issued, and the knife discriminator will activate the second knife in this abnormal state.
A crime prevention device for an elevator, characterized in that it is equipped with a reporting device that reports to a police station, etc., if the signal is output. 2. The elevator security device according to claim 1, wherein the knife discriminator is a device that detects an increase in light intensity due to uneven reflection of light caused by a knife or the like. 3. The knife discriminator includes a frequency detection circuit and at least two level comparators having different detection levels, and the signal according to the luminance spatial distribution is detected by the level comparator when the frequency detected by the frequency detection circuit is equal to or higher than a predetermined value. 2. The elevator security device according to claim 1, wherein the device determines that a knife or the like is present in the elevator car when the detection level is within a range of different detection levels.