JPH0672647A - Remote supervisory terminal device for elevator - Google Patents

Abstract

PURPOSE:To improve sureness of a report of an in-cage confined condition by detecting a condition of communication lines, and stopping supply of power by an auxiliary power supply before resetting the communication lines, when detected abnormality thereof, to a normal condition, so as to prevent the auxiliary power supply from being wastefully consumed, at the time of generating power interruption. CONSTITUTION:At the time of ordinary operation, a current is supplied to a DC/DC converter 32 by a main power supply 28 based on an input of a commercial power supply, and here obtained voltage of DC5V is applied to a telephone line processing part and a remote supervisory terminal device having a digital circuit part. A charging current is supplied to a battery 29 charged through a charging resistor 31. On the other hand, at the time of power interruption, the converter 32 is electrified from the battery 29 by closing a contact 44, to inform an elevator maintenance company in the outside through the remote supervisory terminal device of confining persons in a cage. Here in the case that a telephone line is placed in an ever capacity condition and disabled from talking, the contact 44 is opened, and the contact 44 is closed with the lapse of each predetermined time, to check whether the conduction of the telephone line is restored or not.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator remote monitoring terminal device capable of monitoring the state of an elevator even in a remote place by using a communication line.

[0002]

2. Description of the Related Art Elevators are being installed not only in middle- and high-rise buildings but also in small-scale buildings and private houses as a vertical transportation system in buildings. Thus, daily maintenance and inspection work is important for elevators that carry people, and monthly regular inspections are obligatory by law.

However, with the increase in the number of elevators installed, the maintenance work of elevators is performed by a dedicated maintenance staff member of an elevator maintenance company, who directly goes out to the building where the elevators are installed to periodically check the elevator status. It is changing to the direction of remote monitoring. This monitoring method collects data on the status of the elevator through a telephone line, and enables a system where maintenance personnel go to the site if an abnormality or failure of the elevator is confirmed. Such a system is called a remote monitoring system and has been installed in most modern elevators.

As shown in FIG. 6, this remote monitoring system monitors a state of an elevator and notifies the telephone line of the data of the elevator, and a public telephone line network 2.
And the receiving device of the maintenance company 3, which is the report destination of the remote monitoring terminal device 1.

The remote monitoring terminal device 1 is an elevator machine room 4
Installed inside the elevator control system 5 and the transmission line 6
Connected by. The functions of the remote monitoring terminal device 1 are roughly classified into three.

[0006] The first function is a function that enables the confined passengers and the maintenance company 3 to have a conversation on the public telephone line network 2 when the elevator fails. That is, an intercom 9 dedicated to the elevator is installed in the elevator car 8 electrically connected to the elevator control device 5 and the tail cord 7, and the intercom 9 is normally connected to the manager in the building. It has become.
When the elevator is out of order, the maintenance company 3 can be contacted directly.

The second function is a function of data communication with the maintenance company 3 that the elevator has become abnormal.

The first function was mainly to rescue passengers trapped in the elevator car 8, but naturally the elevator would fail even if there were no passengers. The maintenance company 3 is notified so that the elevator recovery time can be shortened.

The third function is a function of performing preventive maintenance before the elevator becomes abnormal. While the above-mentioned two functions are mainly notifications after the elevator has failed, this function is to detect in advance before the elevator fails.

The remote monitoring system for an elevator not only accelerates the recovery of an elevator abnormality due to the combination of the above-mentioned functions, but also has an excellent function capable of taking measures before the abnormality occurs. The remote monitoring terminal device 1 receives the elevator status one by one through the transmission line 6, and when an abnormality is detected, the remote monitoring terminal device 1 is connected to the public telephone line network 2 independent of the transmission line 6 and can notify the maintenance company 3.

Next, the configuration of such a remote monitoring terminal device 1 will be described with reference to FIG. The remote monitoring terminal device 1 includes a digital circuit unit 10 that processes and stores data from the elevator control device 5 and the maintenance company 3, a power supply circuit processing unit 11 that controls the power supply circuit, the elevator control device 5 and the maintenance company 3. A data transmission unit 12 for performing data transmission with
It can be roughly divided into five blocks: a voice control unit 13 that processes voice of the intercom 9 and a telephone line, and a power supply unit 27.

The digital circuit section 10 is mainly composed of a CPU 14 of about 16 bits, a read-only storage element ROM 15 for storing a program, a readable / writable storage element RAM 16 for storing data, and an EERO for storing specification data.
M17 (electrically erasable ROM), calendar IC18 for time control (year, month, day, week, hour, minute and second are generated inside the IC) and the like.

Further, the telephone line processing section 11 includes an in-use determination circuit 19 for checking the state of use of the telephone line, a ringing circuit 20 for checking a ringing tone, and a dialer circuit 2 for dialing.
1. The tone receiver circuit 22 receives a push button signal. The telephone line processing unit 11 is similar to a general telephone terminal device.

The data transmission section 12 comprises a serial circuit 23 for exchanging data with the elevator control device 5, and a data conversion circuit 24 (for example, an optical fiber connector) for converting the data so as to interface with the elevator control device 5. Has been done.

The voice control unit 13 is composed of an amplifier circuit 25 for matching voices between the intercom 9 and a telephone line, and a selection circuit 26 for selecting one of a plurality of intercoms. In the remote monitoring terminal device 1 having the above configuration, the transmission line 6 can communicate with the elevator control device 5 using a serial transmission procedure.

The power supply unit 27 is a commercial power supply (usually A
It is composed of a main power supply 28 for enabling the microcomputer to operate from C100V) and an auxiliary power supply 28 for enabling the microcomputer to operate even during a power failure. A rechargeable battery is usually used as the auxiliary power supply 29. FIG. 8 is a block diagram showing an example of such a power supply unit 27.

In FIG. 8, a commercial power source (AC100V)
Is converted to about DC15V (point A) by the switching power supply 28 in order to charge the battery 29. As mentioned above, to operate the microcomputer D
Since C5V is required, the voltage at the point A is converted to DC5V by the DC / DC converter 32. On the other hand, battery 2
A charging current flows into 9 through the charging resistor 31. This current value is about several tens of mA, and when the commercial power supply is normal, it is always in a charged state.

However, at the time of power failure, a driving current is generated from the battery 29 via the diode 30, and DC / DC
DC5V is generated at the point B via the converter 32. Such a power supply configuration is called a trickle charging circuit, and is a configuration often used for a general non-interruption circuit. In the case of this example, the battery 29 has a configuration in which 11 Ni-cd (nickel-cadmium) batteries are connected in series. In general,
Since the Ni-cd battery has a nominal voltage of 1.2V, a voltage of 13.2V is supplied from the battery 29 during a power failure.

At this time, of course, the DC / DC converter 3
The voltage applied to 2 is smaller than that when the commercial power supply is normal, but this voltage value is a value that does not cause any problem due to the input characteristics of the DC / DC converter 32. This is because in the case of the trickle charging method, the circuit does not work unless the voltage at the time of power failure is lowered. However, there is an advantage that it can be hit without interruption.

Such a remote monitoring terminal device 1 is 300 ×
The size of the unit is about 300 x 60 mm,
Often mounted on the side of the elevator controller 5. In this way, the remote monitoring system is operating.

[0021]

As described above, the conventional remote monitoring terminal device 1 has an excellent effect on prompt restoration and preventive maintenance when an abnormality occurs in the elevator.

However, the conventional remote monitoring terminal device 1 is
Although the auxiliary power supply 29 can be operated at the time of a power failure, since the auxiliary power supply 29 has a large capacity, it occupies most of the size and weight of the remote terminal device 1. This is unavoidable to some extent because it normally requires a current consumption of about 5 V DC and 400 mA for operating the microcomputer circuit and a large capacity of auxiliary power supply.

When the battery is used, the auxiliary power supply 29 has a size of 100 × 60 × 50 mm and a weight of about 900 g, which accounts for 30% of the weight of the apparatus itself. Generally, the operating time of such a battery 29 is often about 30 minutes at most.

On the other hand, considering the recent power supply situation, the frequency of power outages is extremely low, but conversely, in the case of power outages, power outages occur over a wide area and it takes several hours to recover. . When such a wide area power failure occurs, it is natural that the usage rate of the telephone line also increases in order to notify the disaster, and even if the remote monitoring system operates, it becomes difficult for the notification to be transmitted to the maintenance company 3. Further, since the maintenance company 3 is also flooded with notifications from a plurality of elevators, it is highly likely that the state of busy will continue for a long time as seen from the remote monitoring terminal device 1.

As a result, even if the passenger becomes canned in the elevator, since the data is not transmitted from the viewpoint of the maintenance company 3, the maintenance staff of the maintenance company 3 may not be able to rescue the passenger.

As described above, as the installation of the remote monitoring terminal device 1 increases, the power outage operation guarantee time must be extended. However, the increase in the capacity of the battery 29 causes a large space in the remote monitoring terminal device 1. This naturally causes not only an increase in the price of the device but also a company problem such as an increase in industrial waste due to an increase in the number of batteries 29.

The present invention has been made in view of the above circumstances, and when an auxiliary power source such as a battery is used when a power failure occurs, the power consumption of the auxiliary power source is taken into consideration in consideration of the limited capacity of the auxiliary power source. It is intended to provide a remote monitoring terminal device for an elevator capable of effectively performing the above.

[0028]

[Means for Solving the Problems] As means for solving the above problems, a first aspect of the present invention is directed to a rescue request from the inside of an elevator car through a communication line by using an auxiliary power source provided inside when a power failure occurs. In a remote monitoring terminal device for an elevator capable of reporting to a communication line state detecting means for detecting normality or abnormality of the state of the communication line while using the auxiliary power source, and the communication line state detecting means detects abnormality And a power supply control means for stopping the power supply by the auxiliary power supply for a predetermined time,
It is characterized in that the power supply by the auxiliary power supply is stopped every predetermined time until the communication line state detecting means detects normality and the notification to the outside is completed.

The second aspect of the present invention is a remote monitoring terminal device for an elevator, which is capable of reporting a rescue request from within an elevator car to the outside through a communication line by using an auxiliary power supply provided inside when a power failure occurs. In the communication line state detecting means for detecting the normality or abnormality of the state of the communication line while using the auxiliary power source, an auxiliary clock generator for supplying a central processing unit with a clock signal having a lower frequency than usual A frequency control means for supplying a clock signal by the auxiliary clock generator for a predetermined time when the communication line state detecting means detects an abnormality, and the communication line state detecting means detects normality, Until the notification to the outside is completed, the clock signal is supplied to the central processing unit at a predetermined time, and the auxiliary clock is supplied. It is characterized in that it has to switch to click generator.

[0030]

In the structure of the first aspect of the invention, the operating state of the auxiliary power supply that operates at the time of power failure is made variable depending on the notification state to the communication line such as a telephone line, and as a result, the total power consumption in the case of adverse conditions is reduced. By doing so, it is intended to provide a remote monitoring terminal device that can withstand a blackout for a long time.

According to the configuration of the second invention, the operating state of the central processing unit which operates at the time of power failure is made variable depending on the state of notification to the communication line, and as a result, the total power consumption in the case of adverse conditions is reduced. Therefore, it is intended to provide a remote monitoring terminal device that can withstand a long power failure.

[0032]

Embodiments of the present invention will be described below with reference to FIGS.

FIG. 1 is a block diagram showing the construction of the main part of the first embodiment of the invention. In this embodiment, the power supply in the microcomputer unit is shut off as a method of reducing the total power.

FIG. 1 shows the structure of the power supply 27A.
This corresponds to FIG. 8 of the conventional device. Power supply unit 2 of FIG.
7A is a digital circuit section 10 of the microcomputer
A battery control unit 33 controlled by A and a battery operation control unit 44 that is a driver of the battery control unit 33 are added to the power supply unit 27 in FIG.

In FIG. 1, when the commercial power supply is normal, AC 100V is applied to the switching power supply 28 to generate DC 15V at the point A. This voltage is converted into DC5V by the DC / DC converter 32. At the same time, a charging current flows into the battery 29 via the charging resistor 31, and the battery 29 is always in a charged state. The above is the same as the conventional one.

In the present invention, when the battery 29A is discharged,
A battery operation controller 44 is attached in series with the diode 30 so that the discharge can be controlled. Further, since the battery control unit 33 has a circuit configuration that is operated by the power source in the preceding stage of the battery operation control unit 44, the voltage is always applied without interruption. This battery control unit 3
3 operates according to a digital output command from the digital circuit section 10A of the microcomputer, and the digital circuit section 1
Even when 0A is turned off, the battery operation control unit 44 can be controlled only by this device.

The remote monitoring terminal device 1 of this embodiment has a function of storing abnormal data in addition to the conventional telephone line processing section 11, digital circuit section 10, data transmission section 12, voice control section 13 and the like. And, the two elements of the function of recording the state of the elevator are added. The telephone line processing unit 11 is directly connected to the public telephone line network 2,
An in-use determination circuit 19 for checking the usage status of the line, a dialer circuit 21 for generating a dial pulse sound for making a call to the maintenance company 3, etc., and a tone receiver circuit 22 for receiving data from the maintenance company 3, etc., And a ringing circuit 20 for determining a ringing tone and connecting a telephone line.

FIG. 2 shows the digital circuit section 10 of this embodiment.
3 is a block diagram showing a configuration of A and a battery control unit 33. FIG. The digital circuit section 10A is similar to the digital circuit section 10 in FIG.
It has an M16, an EEROM17, and a calendar IC18. The dial information for communication to each elevator is stored in the EEROM 17. Since this dial information is a number of about 20 digits, a capacity of about 20 bytes is required.

A register 34 for controlling external equipment is added to the digital circuit section 10A. The register 34 has a telephone line state detection register 35, a power supply control register 36, and a telephone line waiting state timer 37. These are general-purpose registers of about 8 bits, which are directly controllable by the CPU 14.

The telephone line status detection register 35 converts the signal obtained in the telephone line processing unit 11 into a digital circuit unit 10A.
It is for converting to. For example, when a call is received from the outside (incoming call detection), a telephone line state detection sound (call progress tone) or the like is stored as a digital signal in the register, and the CPU 14 can confirm the telephone line state. There is.

The power supply control register 36 is a register for the CPU 14 to output a command to the power supply unit 27A. Although a specific operation will be described later, the power supply state is changed by using this register when the transmission device of the maintenance company 3 is busy when an alarm is issued during a power failure.

The telephone line waiting state timer 37 is a timer for detecting the time until the recurrence is reported after the busy state is detected. Generally, this timer value is about 1 minute.

Further, the battery control unit 3 in the power supply unit 27A
3 includes a state holding unit 38, a load driver unit 39, and a main power source detection unit 40.

The state holding unit 38 controls whether the power supply to the microcomputer of the battery 29 is valid or invalid according to a command from the power supply control register 36 in the register 34. Since the state holding unit 38 is supplied with power by the battery 29 without interruption, it can operate with its own timer after receiving a command once.

The load driver section 39 is a circuit for controlling the battery operation control section 44 which actually supplies power from the auxiliary power supply 29 to the microcomputer. As the battery operation control unit 44, an element such as an electromagnetic relay contact, a transistor or an FET capable of controlling a current of several tens mA is used. In FIG. 1, the battery operation control unit 44 expresses the case of an electromagnetic relay. When the battery power supply is permitted, the contacts are closed and current is supplied from the battery.

The main power source detecting section 40 detects the presence or absence of commercial power source, that is, the power failure detection. Generally, an electromagnetic relay is directly connected to a commercial power source for this detection.

Next, the operation of the embodiment of the first aspect of the invention configured as described above will be described with reference to the flowchart of FIG. 3 and the timing chart of FIG.

In FIG. 3, first, in step 1, a power failure state is detected. The process according to the present invention is effective only when the power failure occurs, and it is desirable not to perform the process when the commercial power source is normal. This is because implementing the contents of the present invention consumes an extra amount of electric power, and naturally the device performance is lowered during that period. Therefore, it should be limited to a special environment such as a power outage. To detect this power failure, the register 34 captures the state of the main power source detection unit 40 in the battery control unit 33, and C
PU14 can know.

In step 2, an alarm process to the maintenance company 3 is performed upon detection of a power failure and the satisfaction of other alarm conditions. When the building loses power, passengers who have been using the elevator during that time are likely to be trapped in the elevator car (called canned goods). The maintenance company 3 does not go to work for rescue just because of a power failure, but rescue is not performed until it is in a canned or broken state. If the maintenance company 3 is busy at the time of this notification, the remote monitoring terminal device 1 once
The telephone line is released, and the alarm is issued again after a certain period of time. The present invention is intended to minimize the decrease in the capacity of the battery 29 by reducing the power consumption of the device up to this fixed time.

Step 3 shows the result of detecting the above-mentioned telephone line condition. If normal transmission is not performed in this step, the public telephone line network 2 is abnormal in addition to the busy telephone line described in step 2, or the transmission device of the maintenance company 3 is abnormal. This includes cases where normal transmission of data is impossible. In step 4, as a preparation for step 5, which is the final step, a process of holding various data is performed. This state saving is to prevent the false alarm from being issued when the power is restored because the process of the present invention intentionally changes the power state.

In step 5, the power saving control register 36 in the register 34 to the state saving unit 38 of the battery control unit 33.
To the power supply state change command. As a result, power is not supplied to the microcomputer.

As for the flow chart of the CPU 14, since the power is not supplied and cannot be executed after step 5, the operation of the power supply section 27A will be described after step 6.

In step 6, the time after power control is counted by the state storage part 38 in the power supply part 27A, and step 2
It measures the time elapsed until the recurrence report mentioned above. When it is determined that the time has passed in this step, the power supply is restored in step 8. Step 7 shows the case where the commercial power supply is restored during execution of this flowchart. Since the present invention is limited only to a power failure, the power supply is not controlled when the commercial power is restored.

Although FIG. 4 shows a timing chart, it shows a commercial power source, a battery 29, a power source command, and a battery control signal. Battery 2 when commercial power goes to power failure
Auxiliary power is supplied from 9. For this reason, the CPU 14 can be executed without being aware of a power outage, but if a canned state is detected during this power outage, the CPU 14 issues a warning command to the maintenance company 3. Here, if the notification cannot be normally made, the notification is made again, but in the present invention, the power supply command is output and the power supply to the microcomputer is cut off by the battery control signal operation. This results in CPU
14, the operation is stopped and the power supply command is reset, but since the battery control unit 33 has the configuration of FIG. 2, the state holding unit 38 holds the battery for a predetermined time. After this time, the battery control signal is reset and the normal battery power state is restored. FIG. 4 shows the above timing.

As described above, according to the above-described embodiment, most of the power source capacity to be supplied by the battery 29 for shutting off the power source of the microcomputer during the period from the time when the call cannot be reported to the time when the call is repeated becomes unnecessary. It is possible to extend the drive time of the auxiliary power supply during a wide area power failure.

If the normal start time and the time required for busy detection are about 20 seconds and the time until re-notification is about 60 seconds, the power consumption during the time until re-notification can be made almost zero. The operation time can be guaranteed about four times that of the conventional device. That is, since the driving time of 30 minutes is conventionally 2 hours, it is possible to provide a device that does not have a problem even in a wide area power failure.

Next, an embodiment of the second invention will be described. According to the second aspect of the present invention, the operating state of the CPU 14 that operates at the time of power failure can be changed according to the state of notification to the telephone line, and as a result, the total power consumption in the case of bad conditions can be reduced, resulting in long-term power failure. The present invention aims to provide a remote monitoring terminal device that can withstand the above. This configuration is shown in FIG.
Shown in.

FIG. 5 is a block diagram of the digital circuit section 10B. Although omitted in the digital circuit section 10A of FIG. 2, the crystal oscillator 41 is required for the CPU 14 to operate, and a frequency of about 16 MHz is generally selected. In FIG. 5, a clock generator 42 is connected to the crystal oscillator 41, and a C
PU14 is being driven.

A second crystal oscillator 41A, which is a feature of the present invention, is added, and an auxiliary clock generator 42A is provided.
Is input to the frequency selection unit 43 via. Frequency 4
1A is a frequency lower than the frequency of the crystal oscillator 41,
For example, it is 8 MHz. This is to reduce the operating performance of the CPU 14 during a power failure.

The frequency selection unit 43 performs frequency selection by the frequency control register 36A in the register 34 described above. The frequency control register 36A has the same function as the power supply control register 36 of FIG. In the case of the second invention, the power supply unit 27A has the same configuration as the conventional one, and unlike the first invention, the power is supplied from the battery 29 even during a power failure.

Next, the operation of the embodiment of the second invention will be described. In the case of this embodiment, steps 1 to 4 in the flowchart of FIG. 3 operate in the same manner, but step 5 and subsequent steps are different operations.

That is, the power supply control command in step 5 becomes a frequency selection command, and power is supplied even after step 6 so that the flow chart of the CPU 14 follows.

After step 5 is executed, the execution speed of the CPU 14 decreases, but the processing is the same. This is because the processing that the CPU 14 has to execute until the recurrence of a power failure is almost the calculation of the waiting time, and other necessary functions are required, and there is no particular problem even if the operating frequency is lowered. .

The power recovery detection in step 7 is a function that is not particularly necessary in the second invention, and the power supply unit 27A only has to automatically switch the power, and there is no item to be processed by the CPU 14.

Step 8 is the reverse of step 5 and is a process for returning the frequency to the origin. The timing chart of FIG. 4 is not applied.

According to the above-described embodiment, the power consumption becomes about 60% by halving the driving process of the microcomputer in the time from the time when the notification is impossible to the time when the notification is repeated. In this embodiment, the time is about 1.5 times that of the conventional device. In the present embodiment, it is also possible to reduce the drive processing by half at the time of power failure.
However, as mentioned earlier, the remote monitoring terminal device does not need to report only when there is a power outage, and it has the feature of notifying when canned or malfunctions occur during a power outage. May not be able to perform the function of. Therefore, it becomes effective only by limiting the conditions as in the present invention.

Next, with respect to the first and second inventions, other embodiments than the above-mentioned embodiment will be described.

In the first aspect of the invention, the CPU 14 which controls the main control does not need to directly process the data, and this function may be realized by the auxiliary CPU. In this case, the configuration also includes the state holding unit 38.

The state-holding unit 38 has been described for the case where the power is always supplied. However, if the circuit configuration is configured by the keep relay and the mechanical timer, the state-holding unit 38 can operate even in the non-power-supply state.

In the second embodiment of the invention, the power supply to the microcomputer circuit itself is cut off. However, the power supply may be cut off only to unnecessary circuit parts.
This is effective because the remote monitoring terminal device 1 is connected to the transmission circuit with the elevator control device 5 and the elevator control device 5 is in a power failure state and there is no need to detect data. In particular, the data conversion circuit 24 often employs an optical collector, which is an effective means because it consumes a relatively large amount of power.

In the second embodiment of the present invention, the structure in which the crystal oscillator 41 is selected has been described, but it is naturally possible to form a single crystal oscillator by dividing the fundamental frequency. Also, if the fundamental frequency is lowered, there arises a problem that the constant relating to time has to be changed. To avoid this, if a wait cycle is inserted for access to the storage element, the execution speed will be reduced. The basic frequencies can be the same. Further, recently, some CPUs 14 themselves include a power failure detection function, and in this case, the peripheral circuit configuration can be simplified.

Further, although common to both the first and second inventions, the communication line is not limited to a telephone line, but a dedicated line using a cable, a wireless and satellite line, or a communication line using a power line is also easy. Applicable to

Although the circuit configuration in which a battery is used as the auxiliary power source has been described, an AC auxiliary power source using an inverter may be used. In this case, the charging circuit configuration is different, but the basic configuration is the same.

[0074]

As described above, according to the present invention, even when a long-term power outage such as a wide area power outage, which has become a problem in recent years, the remote monitoring terminal device of the elevator to be monitored by the maintenance company is installed. Since the status can be transmitted, quick rescue work can be expected in the worst case where the elevator customer is in a canned state.

In particular, the canned accident in the elevator is a great concern for passengers, and it is necessary to shorten the rescue time as much as possible, but it is expected that the telephone line itself will be punctured during a wide area power outage. However, according to the present invention, the operating time of the auxiliary power supply can be made as long as possible, and the certainty of the notification can be increased.

Further, the remote monitoring terminal device itself can be downsized by downsizing the auxiliary power source such as the battery, and the installation and maintenance work can be facilitated.

[Brief description of drawings]

FIG. 1 is a block diagram of a power supply unit according to an embodiment of the first invention.

FIG. 2 is a partial block diagram of a digital circuit unit and a power supply unit according to the embodiment of the first invention.

FIG. 3 is a flowchart for explaining the operation of FIGS. 1 and 2.

FIG. 4 is a timing chart for explaining the operation of FIGS. 1 and 2.

FIG. 5 is a partial block diagram of a digital circuit unit according to an embodiment of the second invention.

FIG. 6 is a configuration diagram of an elevator system using a conventional device.

FIG. 7 is a block diagram showing a configuration of a conventional device.

8 is a block diagram showing a configuration of a power supply unit in FIG.

[Explanation of symbols]

1 Remote Monitoring Terminal Device 10A, 10B Digital Circuit Unit 27A Power Supply Unit 29 Auxiliary Power Supply (Battery) 35 Communication Line Status Detection Means (Telephone Line Status Detection Register) 36 Power Supply Control Means (Power Supply Control Register) 36A Frequency Control Means (Frequency Control Register) ) 42A auxiliary clock generator

Claims (2)

[Claims] 1. A remote monitoring terminal device for an elevator, which is capable of reporting a rescue request from the inside of an elevator car to the outside through a communication line by using an auxiliary power supply provided inside when a power failure occurs, wherein the auxiliary power supply is in use. A communication line state detecting means for detecting a normal or abnormal state of the communication line; and a power supply control means for stopping the power supply by the auxiliary power source for a predetermined time when the communication line state detecting means detects an abnormality. , And the power supply from the auxiliary power supply is stopped every predetermined time until the communication line state detection means detects normality and the notification to the outside is completed. Remote monitoring terminal equipment for elevators. 2. A remote monitoring terminal device for an elevator, which is capable of reporting a rescue request from inside an elevator car to the outside via a communication line by using an auxiliary power supply provided inside when a power failure occurs. A communication line state detecting means for detecting whether the state of the communication line is normal or abnormal; an auxiliary clock generator for supplying a central processing unit with a clock signal having a frequency lower than a normal time; and the communication line state detecting means. When an abnormality is detected, a frequency control means for supplying a clock signal by the auxiliary clock generator for a predetermined time is provided,
Until the communication line state detecting means detects the normal condition and the notification to the outside is completed, the supply of the clock signal to the central processing unit is switched to the auxiliary clock generator every predetermined time. Elevator remote monitoring terminal device.