JP6311544B2 - Elevator control system - Google Patents

Description

  The present invention relates to an elevator control system.

  In a conventional elevator control system, a non-contact IC reader is installed on the car and the upper part of the hoistway, and when these non-contact IC readers read IC tag information carried by a maintenance worker, the elevator control device Is known to stop the traveling of the car (for example, see Patent Document 1).

  Also, install a non-contact IC reader in the pit of the hoistway at least one of the lower part of the counterweight installed under the car or in the hoistway, When the non-contact IC reader installed in one of them and the non-contact IC reader installed in the pit read the IC tag information carried by the maintenance worker, the elevator control device stops the traveling of the car Is also known in the prior art (for example, see Patent Document 1).

  Or, a transmitter that sends an activation signal to activate the notification device attached to a device such as a counterweight or elevator in the elevator hoistway, and a receiver that receives a radio signal from the transmitter and a radio wave from the transmitter When a signal is received, a notification unit provided with a transmission unit that transmits a radio signal to the receiver and a notification unit that notifies the receiver of the reception of the radio signal, and a radio signal received from the transmission unit of the notification device A device including a receiver for preventing operation is also known in the related art (for example, see Patent Document 2).

JP2013-216425A JP 2005-132543 A

  However, since the conventional elevator control system disclosed in Patent Document 1 uses a non-contact IC reader for receiving radio signals (radio waves), the cost required for system construction is increased. Moreover, the operation of the car is stopped regardless of the actual operation state of the car only by the IC tag carried by the maintenance worker only entering the tag detection range of the non-contact IC reader. For this reason, for example, there is a possibility that the IC tag carried by the maintenance worker in the car is detected by the non-contact IC reader of the counterweight and the car stops unexpectedly. .

  Also in the prior art disclosed in Patent Document 2, since the notification device is activated by a radio signal (radio wave), there is a problem similar to that described in Patent Document 1 as described above.

  The present invention has been made to solve such a problem, and more accurately detects the position of the worker who is working in the elevator hoistway and grasps the operation status of the elevator. It is possible to obtain an elevator control system capable of appropriately performing the necessary alerting for the vehicle and suppressing the cost required for system construction.

In the elevator control system according to the present invention, an ultrasonic wave having a predetermined frequency and a predetermined intensity is provided at at least one of the bottom of the elevator hoistway and the upper part of the car in the hoistway. Ultrasonic control means for generating a car, control means for controlling the operation of the car, and a detection device carried by a worker working in the hoistway, wherein the detection apparatus is configured to generate the ultrasonic waves. A position of the detection device in the hoistway based on a receiving means capable of receiving the ultrasonic wave generated by the means and an intensity of the ultrasonic wave of the constant frequency received by the receiving means. A position determining means for determining a detected position; and a transmitting means for transmitting the detected position determined by the position determining means with a radio signal, wherein the control means is transmitted from the transmitting means. Receiving means capable of receiving the received radio signal, driving status acquisition means for acquiring the driving status of the elevator, the detected position of the radio signal received by the receiving means, and the driving status acquired by the driving status acquisition means; And determining means for determining whether or not a preset alerting condition is satisfied, and alerting the worker when the determining means determines that the alerting condition is satisfied A warning means, and an operation control means for stopping the car when the judgment means determines that the warning condition is satisfied, and the ultrasonic wave generating means is provided in the car. And further includes an in-car ultrasonic wave generating means for generating an ultrasonic wave with an in-car frequency different from the constant frequency, wherein the position determining means When reception of the sound wave, the detection position is determined to be in the car, the operation control means, between the detected position is within the car permits traveling the car structure And

  In the elevator control system according to the present invention, the position of the worker who is working in the elevator hoistway is detected more accurately, the operating status of the elevator is grasped, and the necessary warning is given to the worker. There is an effect that it can be performed appropriately. Moreover, the effect that the cost required for system construction can be suppressed is also produced.

It is a figure which shows typically the whole structure of the control system of the elevator which concerns on Embodiment 1 of this invention. It is a block diagram which shows the structure of the control panel and detection apparatus of an elevator control system which concern on Embodiment 1 of this invention. It is a block diagram which shows the structure of the control panel and detection apparatus of an elevator control system which concern on Embodiment 2 of this invention.

  The present invention will be described with reference to the accompanying drawings. Throughout the drawings, the same reference numerals indicate the same or corresponding parts, and redundant description thereof will be simplified or omitted as appropriate.

Embodiment 1 FIG.
1 and 2 relate to Embodiment 1 of the present invention. FIG. 1 is a diagram schematically showing the overall configuration of an elevator control system, and FIG. 2 is a diagram of an elevator control system control panel and detection device. It is a block diagram which shows a structure.

  As shown in FIG. 1, a car 2 is installed in an elevator hoistway 1 so as to be movable up and down. One end of the main rope 4 is connected to the upper end of the car 2. The other end of the main rope 4 is connected to the upper end of the counterweight 6. An intermediate portion of the main rope 4 is wound around a driving sheave and a deflector 5 of the hoisting machine 3 installed at the bottom of the hoistway 1. In this way, the car 2 and the counterweight 6 are suspended by the main rope 4 so as to move up and down in directions opposite to each other in the hoistway 1.

  A control panel 10 is installed near the bottom in the hoistway 1. The control panel 10 is a control means for controlling the operation of the car 2. That is, the driving sheave of the hoisting machine 3 is rotated under the control of the control panel 10, and the car 2 moves up and down in the hoistway 1 by the rotational driving of the hoisting machine 3. As described above, when the car 2 moves up and down, the counterweight 6 moves up and down in the direction opposite to the car 2.

  A speaker 7 is installed in the hoistway 1. Three speakers 7 are installed: an on-car speaker 7a, a hoistway bottom speaker 7b, and an in-car speaker 7c. The car speaker 7 a is installed on the upper part of the car 2, that is, on the upper outside of the ceiling of the car 2. The hoistway bottom speaker 7 b is installed at the bottom of the hoistway 1. The car speaker 7 c is installed inside the car room of the car 2. Hereinafter, the car-speaker 7a, the hoistway bottom speaker 7b, and the car-speaker 7c are collectively referred to as the speaker 7.

  Each of these speakers 7 is an ultrasonic wave generating means for generating an ultrasonic wave. The intensity of the ultrasonic waves generated by these speakers 7 is a predetermined intensity. Of these speakers 7, the frequency of the ultrasonic waves generated by the car top speaker 7a and the hoistway bottom speaker 7b is a predetermined constant frequency. The frequency of the ultrasonic wave generated by the car speaker 7c is set to a frequency different from the fixed frequency (hereinafter referred to as “car frequency”).

  In addition, the speaker 7 as an ultrasonic wave generation means should just be provided with at least any one of the speaker 7a on a cage | basket | car, and the speaker 7b of a hoistway bottom part. When both the on-car speaker 7a and the hoistway bottom speaker 7b are provided as the speakers 7, the intensity of each ultrasonic wave generated by these speakers 7 is set to be equal. In this case, the frequencies of the ultrasonic waves generated by these speakers 7 are set to constant frequencies that are different from each other and different from the in-car frequency.

  A worker 8 working in the hoistway 1 has a detection device 20. The configurations of the detection device 20 and the control panel 10 will be described with reference to FIG. As illustrated in FIG. 2, the detection device 20 includes a microphone 21, an extraction unit 22, a storage unit 23, a position determination unit 24, and a terminal-side transmission unit 25.

  The microphone 21 is a wave receiving means capable of receiving the ultrasonic waves generated by the respective speakers 7 which are ultrasonic wave generating means. That is, when an ultrasonic wave from each speaker 7 is input, the microphone 21 converts the input ultrasonic wave into an electrical signal and outputs it.

  The ultrasonic electrical signal output from the microphone 21 is input to the extraction unit 22. The extraction unit 22 calculates the frequency of the ultrasonic wave generated by each speaker 7 out of the entire frequency band of the ultrasonic wave received by the microphone 21 as the wave receiving means, that is, the band of the constant frequency and the frequency in the car. Extraction means for extracting.

  Here, the storage unit 23 of the detection apparatus 20 stores in advance the constant frequency and the in-car frequency of the ultrasonic wave generated by the speaker 7 which is an ultrasonic wave generation unit. As described above, when two speakers 7 are installed in the hoistway 1, the car top speaker 7 a and the hoistway bottom speaker 7 b, the constant frequency is different for each speaker 7. Is set. The storage unit 23 stores the frequencies of ultrasonic waves generated by all these speakers 7.

  Then, the extraction unit 22 refers to the frequency stored in the storage unit 23 and extracts the frequency stored in the storage unit 23 from the entire frequency band of the ultrasonic wave received by the microphone 21. Specifically, for example, the extraction unit 22 is configured using a bandpass filter or the like that passes only the frequency of the ultrasonic wave generated by the speaker 7 and cuts a band other than the frequency.

  The position determination unit 24 determines the position of the detection device 20 in the hoistway 1 (hereinafter referred to as “detection position”) based on the intensity of the ultrasonic wave having the constant frequency received by the microphone 21 serving as a wave receiving means. It is a position judging means for judging. The position determination unit 24 first identifies the frequency at which the received intensity at the microphone 21 is maximum for the signal in the ultrasonic frequency band generated by each speaker 7 extracted by the extraction unit 22.

  Next, the position determination unit 24 identifies from which speaker 7 the ultrasonic wave having the frequency with the maximum received wave intensity is generated with reference to the information stored in the storage unit 23. Then, the position determination unit 24 determines that the detection device 20 is near the speaker 7 that has generated ultrasonic waves having a frequency with the maximum received wave intensity.

  Specifically, if the received intensity of the frequency of the ultrasonic wave generated from the car speaker 7a is maximum, the position determination unit 24 determines that the detection position is on the car 2. If the received intensity of the frequency of the ultrasonic wave generated from the hoistway bottom speaker 7b is maximum, the position determination unit 24 determines that the detection position is the bottom of the hoistway 1.

  The position determination unit 24 determines that the detected position is in the car 2 when the microphone 21 receives ultrasonic waves having the in-car frequency. That is, if the in-car frequency is included in the frequency band extracted by the extracting unit 22, the position determining unit 24 determines that the detected position is in the car 2.

  The terminal-side transmission unit 25 is a transmission unit that transmits the detected position determined by the position determination unit 24 using a radio signal.

  Here, the detection apparatus 20 having the above-described configuration can be mounted using a mobile phone terminal such as a smartphone. By using the mobile phone terminal, the microphone originally provided in the mobile phone terminal can be used as ultrasonic wave receiving means. Furthermore, the wireless signal transmission function originally provided in the mobile phone terminal can be used as the transmission means.

  Similarly, as shown in FIG. 2, the control panel 10 includes an elevator-side receiving unit 11, an operation status acquisition unit 12, an elevator-side determination unit 13, an elevator-side notification unit 14, and an operation control unit 15.

  The elevator-side receiving unit 11 is a receiving unit that can receive a radio signal transmitted from the terminal-side transmitting unit 25 that is a transmitting unit. The driving status acquisition unit 12 is driving status acquisition means for acquiring the driving status of the elevator. The elevator driving status acquired by the driving status acquisition unit 12 includes whether the car 2 is running or stopped, the position of the car 2, and when the car 2 is running. Includes the direction of travel (whether it is rising or descending).

  The elevator side determination unit 13 satisfies a preset alerting condition based on the detection position of the wireless signal received by the elevator side reception unit 11 and the operation state of the elevator acquired by the operation state acquisition unit 12. It is a determination means for determining whether or not.

  As described above, the terminal side transmission unit 25 of the detection device 20 transmits the detection position, that is, the position of the detection device 20 in the hoistway 1 determined by the position determination unit 24 by a radio signal. And the elevator side receiving part 11 of the control panel 10 receives the radio signal from this terminal side transmitting part 25. Therefore, the radio signal received by the elevator side receiving unit 11 includes the detection position. The elevator side determination unit 13 first acquires the detection position included in the radio signal received by the elevator side reception unit 11.

  Further, the elevator side determination unit 13 acquires the operation state of the elevator acquired by the operation state acquisition unit 12. And the elevator side determination part 13 confirms whether the said detection position acquired in this way and the driving | running | working condition of an elevator satisfy | fill alert conditions.

  A specific example of this alerting condition will be described. First, when the detection position is the bottom of the hoistway 1, either the car 2 or the counterweight 6 is within a predetermined distance from the bottom of the hoistway 1 with respect to the driving situation. And when it is descending, the alert condition is met.

  Next, when the detected position is on the car 2, when the driving situation is a situation where the car 2 and the counterweight 6 pass each other, a warning condition is established. Here, the following two cases can be considered as the situation where the passing between the car 2 and the counterweight 6 occurs. The first case is a case where the car 2 is on the upper floor side from the counterweight 6 and the car 2 is descending. The second case is a case where the car 2 is on the lower floor side than the counterweight 6 and the car 2 is being lifted.

  Further, when the detection position is on the car 2, with respect to the driving situation, the car 2 is within a predetermined distance from the top of the hoistway 1 and the car 2 is raised. The alert condition is satisfied even when the user is in the middle.

  The elevator side notifying unit 14 is a warning means for calling attention of the worker 8 when it is determined by the elevator side determination unit 13 which is a determination means that the warning condition is satisfied. That is, when the elevator side determination unit 13 determines that the above-described alerting condition is satisfied, the elevator side notification unit 14 notifies the worker 8 by voice. And the alert of the worker 8 is alerted by this notification.

  The elevator side notification unit 14 includes a speaker provided in the hoistway 1 to notify the worker 8 that the alerting condition has been established. A dedicated speaker may be used for the elevator-side notifying unit 14, or the speaker 7 serving as an ultrasonic wave generation unit may be used. When the speaker 7 is also used as the elevator-side notification unit 14, the speaker 7 needs to be able to generate sound waves having a frequency in the audible range as well as in the ultrasonic region.

  The operation control unit 15 is for controlling the operation of the car 2. The operation control unit 15 is an operation control unit that stops the car 2 when it is determined by the elevator side determination unit 13 that is a determination unit that the alerting condition is satisfied. The driving control unit 15 controls the car 2 as usual when the alerting condition is not satisfied. In other words, the traveling of the car 2 is not particularly limited unless the alerting condition is satisfied.

  On the other hand, when the alerting condition is satisfied, the traveling of the car 2 is prohibited. Here, as described above, when the alert condition is satisfied, the car 2 is traveling. Accordingly, the operation control unit 15 promptly stops the traveling car 2.

  Note that the operation control unit 15 as an operation control unit may allow the car 2 to travel while the detection position is in the car 2. The fact that the detection position is in the car 2 means that the worker 8 is in the car 2, and the detection device 20 possessed by the worker 8 detects the ultrasonic wave from the car speaker 7c. It is. Therefore, in such a case, the traveling of the car 2 is not limited assuming that the alerting condition is not satisfied.

  In the elevator control system configured as described above, first, it is assumed that the worker 8 carrying the detection device 20 is working at the bottom of the hoistway 1. In this case, the detection device 20 is closest to the hoistway bottom speaker 7b of the speakers 7, and the ultrasonic wave receiving intensity from the hoistway bottom speaker 7b is maximized. Therefore, the position determination unit 24 determines that the detection position is the bottom in the hoistway 1.

  In this state, the car 2 is run by the operation control unit 15, and one of the car 2 and the counterweight 6 is within a predetermined distance from the bottom of the hoistway 1, and the one When is falling, the alert condition is met. Therefore, the elevator side notifying unit 14 is alerted and the operation control unit 15 stops the traveling of the car 2.

  Next, consider the case where the worker 8 is working on the car 2. In this case, the detection device 20 is closest to the car-mounted speaker 7a among the speakers 7, and the intensity of ultrasonic waves received from the car-mounted speaker 7a is maximized. Therefore, the position determination unit 24 determines that the detected position is on the car 2.

  In this state, the car 2 is driven by the operation control unit 15, the car 2 is within a predetermined distance from the top of the hoistway 1, and the car 2 is rising. In this case, the alert condition is established. Therefore, the elevator side notifying unit 14 is alerted and the operation control unit 15 stops the traveling of the car 2.

  Or, in this state, the alerting condition is also established when the car 2 and the counterweight 6 pass each other. Therefore, the elevator side notifying unit 14 is alerted and the operation control unit 15 stops the traveling of the car 2.

  In addition, when the worker 8 carrying the detection device 20 is in the car 2, the microphone 21 of the detection device 20 receives the ultrasonic waves from the car speaker 7c. Therefore, the position determination unit 24 determines that the detected position is in the car 2. In this case, the operation control unit 15 enables the car 2 to travel as in normal times.

  Note that the speaker 7 which is an ultrasonic wave generation unit does not always have to generate ultrasonic waves. The speaker 7 only needs to generate ultrasonic waves while the worker 8 carries the detection device 20 and works in the hoistway 1.

  Furthermore, the speaker 7 does not always need to be installed at each position described above in the hoistway 1. Therefore, the speaker 7 is detachably provided at each position in the hoistway 1, and the speaker 7 is removed at the normal time, and when the worker 8 starts work in the hoistway 1, the speaker 7 is placed at each position. Installed in to start the generation of ultrasound. Then, when the work of the worker 8 in the hoistway 1 is completed, the speaker 7 may be removed.

  In particular, when a dedicated speaker is installed as the elevator-side notification unit 14, it is not necessary to connect the speaker 7 and the control panel 10 with a wiring, and thus can be easily realized.

  The elevator control system configured as described above controls the operation of the car 2 and at least one of the car top speaker 7a and the hoistway bottom speaker 7b, which are ultrasonic wave generating means for generating ultrasonic waves of a constant frequency. A control panel 10 and a detection device 20 possessed by a worker 8 working in the hoistway 1 are provided.

  In addition, the detection device 20 includes a microphone 21 that can receive the ultrasonic wave generated by the ultrasonic wave generation unit, and the intensity of the ultrasonic wave having the constant frequency received by the microphone 21 in the hoistway 1. A position determination unit 24 that determines a detection position that is the position of the detection device 20, and a terminal-side transmission unit 25 that transmits the detection position determined by the position determination unit 24 using a radio signal.

  The control panel 10 is received by the elevator-side receiving unit 11 that can receive the radio signal transmitted from the terminal-side transmitting unit 25, the driving status acquisition unit 12 that acquires the driving status of the elevator, and the elevator-side receiving unit 11. An elevator side determination unit 13 for determining whether or not a preset alert condition is satisfied based on the detected position of the wireless signal and the driving state acquired by the driving state acquisition unit 12, and an elevator side determination And an elevator-side notifying unit 14 that is an alerting means for alerting the worker 8 when it is determined by the unit 13 that the alerting condition is satisfied.

  In this way, the position of the worker who is working in the elevator hoistway can be detected more accurately by using ultrasonic waves, and the operation status of the elevator is grasped by providing an operation status acquisition unit. Therefore, it is possible to more appropriately alert the workers. Further, by detecting the position of the worker using ultrasonic waves, it is possible to suppress the cost required for system construction.

Embodiment 2. FIG.
FIG. 3 relates to Embodiment 2 of the present invention, and is a block diagram showing a configuration of a control panel and a detection device of an elevator control system.
In the second embodiment described here, in the configuration of the first embodiment described above, the establishment of the alert condition is performed not by the control panel on the elevator side but by the detection device on the terminal side.

  That is, the overall configuration of the elevator control system according to the second embodiment is substantially the same as that of the first embodiment shown in FIG. However, the car speaker 7c is different in that it does not need to be installed in the second embodiment. In FIG. 1, the wireless signal is transmitted from the detection device 20 to the control panel 10, but in the second embodiment, the wireless signal is transmitted from the control panel 10 to the detection device 20 as described later. Is also different.

  Based on the overall configuration as described above, the configuration of the control panel 10 and the detection device 20 in the second embodiment will be described with reference to FIG. First, the control panel 10 includes an operation state acquisition unit 12 and an elevator side transmission unit 16. The driving status acquisition unit 12 is the same as that in the first embodiment. That is, the driving status acquisition unit 12 is driving status acquisition means for acquiring the driving status of the elevator. And the elevator side transmission part 16 is a transmission means which transmits the driving | running state of the elevator acquired by the driving | running condition acquisition part 12 which is a driving | running condition acquisition means with a radio signal.

  Next, the detection apparatus 20 includes a microphone 21, an extraction unit 22, a storage unit 23, a position determination unit 24, a terminal side reception unit 26, a terminal side determination unit 27, and a terminal side notification unit 28. Among these, since the microphone 21, the extraction unit 22, the storage unit 23, and the position determination unit 24 are the same as those in the first embodiment, the description thereof is omitted.

  The terminal-side receiving unit 26 is a receiving unit that can receive a radio signal transmitted from the elevator-side transmitting unit 16 that is a transmitting unit. Whether the terminal-side determination unit 27 satisfies a preset alert condition based on the operation status of the elevator of the radio signal received by the terminal-side reception unit 26 and the detected position determined by the position determination unit 24 It is a determination means for determining whether or not.

  The radio signal received by the terminal-side receiving unit 26 includes the elevator driving status acquired by the driving status acquiring unit 12. The terminal side determination unit 27 acquires the driving situation included in the wireless signal received by the terminal side reception unit 26.

  Further, the terminal side determination unit 27 acquires the detection position determined by the position determination unit 24. And the terminal side determination part 27 confirms whether the said detection position acquired in this way and the driving | running | working condition of an elevator satisfy | fill alert conditions. A specific example of this alerting condition is the same as that in the first embodiment.

  The terminal-side notification unit 28 is a caution-calling unit that calls the worker 8's attention when it is determined by the terminal-side determination unit 27 that is a determination unit that the caution condition is satisfied. That is, when the terminal-side determination unit 27 determines that the above-described alerting condition is satisfied, the terminal-side notification unit 28 notifies the worker 8 by voice, light, screen display, or the like. And the alert of the worker 8 is alerted by this notification. The terminal-side notification unit 28 appropriately includes a speaker, an LED, a display device, or the like according to the notification form.

  Here, the detection apparatus 20 having the above-described configuration can be implemented using a mobile phone terminal such as a smartphone, for example, as in the first embodiment. By using the mobile phone terminal, the microphone originally provided in the mobile phone terminal can be used as ultrasonic wave receiving means. Further, the reception function of the radio signal originally provided in the mobile phone terminal can be used as the reception means. Furthermore, the terminal-side notification unit 28 can be configured using a speaker, a screen display function, an LED, and the like that are originally provided in the mobile phone terminal.

Other configurations are the same as those in the first embodiment, and detailed description thereof is omitted.
Further, the speaker 7 which is an ultrasonic wave generation unit does not always need to generate an ultrasonic wave, and the speaker 7 is used only while the worker 8 carries the detection device 20 and works in the hoistway 1. The point which should just generate an ultrasonic wave is the same as that of Embodiment 1.

  Further, the speaker 7 is detachably provided at each position in the hoistway 1, and the speaker 7 is normally removed, and when the operator 8 starts work in the hoistway 1, the speaker 7 is placed at each position. The point that it may be installed to start generation of ultrasonic waves is the same as in the first embodiment.

  The elevator control system configured as described above controls the operation of the car 2 and at least one of the car top speaker 7a and the hoistway bottom speaker 7b, which are ultrasonic wave generating means for generating ultrasonic waves of a constant frequency. A control panel 10 and a detection device 20 possessed by a worker 8 working in the hoistway 1 are provided.

  In addition, the control panel 10 includes an operation status acquisition unit 12 that acquires the operation status of the elevator, and an elevator-side transmission unit 16 that transmits the operation status acquired by the operation status acquisition unit 12 with a radio signal. .

  The detection device 20 includes a terminal-side receiving unit 26 that can receive a radio signal transmitted from the elevator-side transmitting unit 16, a microphone 21 that can receive the ultrasonic waves generated by the ultrasonic wave generation unit, and a microphone 21. And a radio signal received by the terminal-side receiving unit 26, and a position determining unit 24 that determines a detection position that is the position of the detecting device 20 in the hoistway 1 based on the intensity of the ultrasonic waves received at a constant frequency. Based on the driving situation and the detected position determined by the position determining unit 24, the terminal-side determining unit 27 that determines whether or not a preset alerting condition is satisfied, and the terminal-side determining unit 27 And a terminal-side notifying unit 28 that is a caution-calling means for calling the worker 8's attention when it is determined that the caution-calling condition is satisfied.

  For this reason, as in the first embodiment, it is possible to more accurately detect the position of the worker who is working in the elevator hoistway by using ultrasonic waves, and further by providing an operating condition acquisition unit. After grasping the driving situation, it is possible to more appropriately alert the workers. Further, by detecting the position of the worker using ultrasonic waves, it is possible to suppress the cost required for system construction.

  DESCRIPTION OF SYMBOLS 1 Hoistway, 2 Passenger car, 3 Hoisting machine, 4 Main rope, 5 Baffle, 6 Balance weight, 7 Speaker, 7a Speaker on car, 7b Hoistway bottom speaker, 7c Speaker in car, 8 Worker, 10 Control Panel, 11 Elevator side receiver, 12 Operation status acquisition unit, 13 Elevator side determination unit, 14 Elevator side notification unit, 15 Operation control unit, 16 Elevator side transmission unit, 20 Detection device, 21 Microphone, 22 Extraction unit, 23 Storage Unit, 24 position determination unit, 25 terminal side transmission unit, 26 terminal side reception unit, 27 terminal side determination unit, 28 terminal side notification unit

Claims (1)

An ultrasonic wave generating means provided at at least one of a bottom part of an elevator hoistway and an upper part of a car in the hoistway to generate ultrasonic waves of a predetermined frequency with a predetermined intensity;
Control means for controlling the operation of the car;
A detection device possessed by a worker working in the hoistway, and
The detection device includes:
Wave receiving means capable of receiving ultrasonic waves generated by the ultrasonic wave generating means;
Position determining means for determining a detection position that is a position of the detection device in the hoistway based on the intensity of the ultrasonic wave of the constant frequency received by the wave receiving means;
Transmitting means for transmitting the detected position determined by the position determining means by a radio signal,
The control means includes
Receiving means capable of receiving a radio signal transmitted from the transmitting means;
Driving status acquisition means for acquiring the driving status of the elevator;
A determination unit that determines whether a preset alert condition is satisfied based on the detection position of the wireless signal received by the reception unit and the driving state acquired by the driving state acquisition unit;
When it is determined by the determination means that the warning condition is satisfied, a warning means for calling attention of the worker;
Driving control means for stopping the car when it is determined by the determination means that the alerting condition is satisfied ,
The ultrasonic wave generating means further includes in-car ultrasonic wave generating means that is provided in the car and generates ultrasonic waves at a car internal frequency different from the constant frequency,
The position determining means determines that the detection position is in the car when the wave receiving means receives ultrasonic waves of the in-car frequency;
The operation control means is an elevator control system that allows the car to travel while the detection position is in the car .

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