JP3692376B2 - Elevator remote monitoring device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an elevator remote monitoring device that monitors the operating state of an elevator and transmits various data to an external monitoring center via a public telephone network.
[0002]
[Prior art]
Elevators are installed not only in medium- and high-rise buildings, but also in small-scale buildings and private houses as vertical transportation in the building. It is important to maintain safe operation at all times for this person and the elevator that carries the cargo. For this reason, daily maintenance and inspection and monthly periodic inspection are performed by dedicated maintenance personnel.
[0003]
Normally, maintenance and inspection of elevators are carried out by dedicated maintenance personnel of specialized elevator maintenance companies. Recently, as the number of installed elevators has increased, full-time maintenance of elevators has been dedicated to elevator maintenance companies. Since the maintenance staff always goes directly to the building where the elevator is installed, the operation status of the elevator is monitored by a remote monitoring device at all times, and there is a possibility that an abnormality may occur or when an abnormality occurs, during periodic inspections, etc. To the building where the elevator is installed Out It has changed to a system that works in the direction.
[0004]
In this monitoring method using a remote monitoring device, the operating status of the elevator installed in the building is constantly monitored by a remote monitoring terminal device installed in the building where the elevator is installed, and various collected data are externally transmitted through a public telephone network. To the monitoring center (that is, the elevator maintenance company), and a call to the monitoring center is made possible via an interphone installed in the elevator car. Therefore, the monitoring center checks the data transmitted from a large number of elevators, and if a warning sign of an abnormality is detected or a failure is confirmed, a dedicated maintenance staff visits the building where the elevator is installed. The express will be used to check for abnormalities and take countermeasures. Such a system is called a remote monitoring system and has been installed in most of the recent elevators.
[0005]
A schematic configuration of such a remote monitoring system is shown in FIG. That is, a remote monitoring terminal device 2 for monitoring the operation state of the elevator is installed in the elevator machine room 1 that is usually provided on the top floor of the building, and is also installed in the elevator machine room 1 to raise the elevator car 3. A transmission line 5 is connected to an elevator control device 4 that controls descending, stopping at a predetermined floor, and the like. The elevator car 3 is provided with a telephone intercom 6 for connecting the elevator machine room 1 and the elevator car 3 for transmission of various signals necessary for operation of the elevator and lighting power source. A communication circuit is formed via the tail cord 7. Various data collected by the remote monitoring terminal device 2 is sent via the public telephone line network 8 to a receiving device of an external monitoring center, that is, a maintenance company 9 that performs elevator maintenance work. ing.
[0006]
The function of the remote monitoring terminal device 2 is roughly divided into the following three.
First, if the elevator breaks down or a power failure occurs and the passenger is trapped in the elevator car 3, the passenger and the staff of the maintenance company 9 can talk to each other, eliminating the passenger's anxiety and urgently. To be able to rescue. An elevator intercom 6 is installed in the elevator car 3. Normally, this intercom 6 communicates with the manager in the building, but in the event of an elevator failure or a power failure, it is a direct maintenance company. 9 so that the passenger can directly tell the maintenance company 9 about the situation of the breakdown or the passenger's situation and request rescue, or conversely, the maintenance company 9 side It is used to report the progress of rescue and encourage passengers to respond calmly.
[0007]
The second is a function to prevent and maintain before the elevator becomes abnormal. The remote monitoring terminal device 2 receives the data regarding the operation state of the elevator from the elevator control device 4 through the transmission line 5 one by one, and the data regarding the operation state of the elevator is constantly maintained via the public telephone line network 8. By transmitting data to the maintenance company 9, the maintenance company 9 can catch signs of abnormalities from changes in the data sent, etc., before the elevator breaks down and stops, This function enables inspection and maintenance of defective parts.
[0008]
The third is to shorten the recovery time in the event of an elevator failure. Since the data related to the operation state of the elevator is transmitted to the maintenance company 9, the situation can be accurately determined by the maintenance company 9 in the event of a failure, and accordingly, appropriate actions can be taken in a short time. The elevator recovery time can be shortened.
[0009]
In this way, the elevator remote monitoring system has the above three functions in addition to responding to passengers confined in the car, and can speed up recovery of elevator failures or take measures before abnormalities occur. It has excellent functions such as
[0010]
Next, the configuration of the remote monitoring terminal device 2 that is generally used will be described with reference to FIG.
[0011]
FIG. 10 is a block diagram showing a schematic configuration of the remote monitoring terminal device 2, which controls the digital circuit unit 10 that processes and stores data from the elevator control device 4 and the maintenance company 9 and the telephone line. A telephone line processing unit 11, a data transmission unit 12 that performs data transmission with the elevator control device 4 and the maintenance company 9, and a voice control unit 13 that processes voices between the intercom 6 and the telephone line provided in the elevator car 3. The power supply unit 27 supplies power to these units.
[0012]
Here, the digital circuit unit 10 is mainly composed of a CPU 14 of about 16 bits, a read-only storage element ROM 15 for storing programs, a readable / writable storage element RAM 16 for storing data, and an EEPROM 17 for storing use data (electrically erasable). PROM), year / month / day / week, hour / minute / second, and the like.
[0013]
The telephone line processing unit 11 includes an in-use determination circuit 19 for checking the usage state of the telephone line, a ringing circuit 20 for checking the ringing tone, a dial circuit 21 for dialing, and a tone receiver circuit 22 for receiving a push button signal. The telephone line processing unit 11 is the same as a general telephone terminal device.
[0014]
Next, the data transmission unit 12 includes a serial circuit 23 that exchanges data with the elevator control device 4 and a data conversion circuit 24 (for example, an optical fiber connector or the like) that converts the data so that it can interface with the elevator control device 4. Yes.
[0015]
The voice control unit 13 includes an amplifier circuit 25 that matches voice between the interphone 6 and the telephone line, and a selection circuit 26 that selects one of the plurality of interphones. Here, it is configured to be able to communicate with the elevator control device 4 using a serial transmission procedure through the transmission line 5.
[0016]
Finally, the power supply unit 27 includes a main power supply 28 that converts a commercial power supply (usually AC100V) into a DC power supply suitable for operating an electronic circuit such as a microcomputer, and a so-called power outage when commercial power is not supplied. An auxiliary power supply 29 is provided for enabling the operation of each electronic circuit. An example of the power supply unit 27 is shown in a block diagram in FIG.
[0017]
As shown in FIG. 11, the commercial power supply (AC100V) is converted to about DC15V (point A) by the switching power supply 28A. Then, the battery 29 </ b> A is charged via the charging resistor 31. The value of the current flowing to the battery 29A via the charging resistor 31 is about several tens of mA, and the battery 29A is always charged when the commercial power is normally supplied. Therefore, as described above, DC5V is necessary to operate an electronic circuit such as a microcomputer, so that the voltage at point A is converted to DC5V (point B) by the DC / DC converter 32. The DC 5 V at point B is supplied as the main power supply 28.
[0018]
On the other hand, when commercial power is not supplied due to a power failure, driving current is supplied from the battery 29A to the point A via the diode 30. As the battery 29A, a Ni-Cd battery is generally used. However, since the Ni-Cd battery is nominally 1.2V, 11 batteries are connected in series. Therefore, the voltage generated at the point A at the time of power failure is 13 .2V. This voltage is converted to DC 5 V via the DC / DC converter 32 and used as the auxiliary power source 29.
[0019]
Such a configuration of the power supply unit 27 is called a trickle charging circuit, and is often used for a general uninterrupted circuit. In this trickle charging circuit, the voltage applied to the DC / DC converter 32 at the time of a power failure is smaller than that when the commercial power supply is normally supplied. In addition, in the trickle charging circuit, the circuit is not established unless the voltage during a power failure is lowered. This trickle charging circuit has the advantage that it can be switched to an auxiliary power source without interruption even if a power failure occurs.
[0020]
The external dimension of such a remote monitoring terminal device 2 is about 300 × 300 × 60 mm, and is often attached to the side surface of the elevator control device 4. In this way, the remote monitoring system is operating.
[0021]
[Problems to be solved by the invention]
As described above, the conventional remote monitoring system has excellent functions such as quick recovery and preventive maintenance in the event of an abnormality in the elevator. Yes.
[0022]
However, in order to operate the electronic circuit such as the microcomputer of the remote monitoring terminal device 2, normally, a power of about 5 VDC and 400 mA is consumed, so a large-capacity auxiliary power supply 29 is required. When the battery 29A is used, the auxiliary power supply 29 in the conventional power supply unit 27 has a size of 100 × 60 × 50 mm and a weight of about 900 g, accounting for 30% of the total weight of the remote monitoring terminal device 2. It was.
[0023]
Further, the continuous operation possible time of the battery 29A is about 30 minutes, and the usage time is relatively short.
[0024]
By the way, considering the power situation in recent years, the frequency of power outages is extremely small, but conversely, when a power outage occurs, there is an increasing number of cases where a long time is required for recovery. When a wide-area power outage occurs, the telephone line usage rate naturally increases in order to convey a disaster. Therefore, even if the remote monitoring system operates, it is expected that the notification will not be easily transmitted to the maintenance company 9. In addition, since a large number of elevators stop at the same time, the maintenance company 9 is flooded with reports from a plurality of elevators, the maintenance company's telephone line overflows, and the remote monitoring terminal device 2 sees it. It ’s very likely that you ’re busy for a long time. As a result, even when passengers are confined in the elevator car 3, there is a problem that the transmission of abnormal data to the maintenance company 9 is delayed and the rescue of the passengers is delayed.
[0025]
Under such circumstances, there is a strong demand for extending the operation guarantee time at the time of a power failure of the remote monitoring terminal device 2. One measure for meeting the demand is to increase the capacity of the battery 29A. However, this measure is not only economically inconvenient because the shape and weight of the remote monitoring terminal device 2 is increased, but also a social problem that industrial waste increases due to the increase in the number of batteries 29A. Was also connected.
[0026]
Therefore, it is necessary to devise a device that can suppress the consumption of the auxiliary power source of the remote monitoring terminal device 2 as much as possible and endure the operation for a long time. The present invention has been made for the purpose of solving such problems and responding to demands.
[0027]
[Means for Solving the Problems]
The first invention monitors the operating state of the elevator, transmits various data to an external monitoring center via a public telephone line network, enables a call between the elevator car and the monitoring center, and further provides a power failure. In an elevator remote monitoring apparatus having a power supply unit equipped with an auxiliary power supply, the power supply unit and the public telephone circuit line A power source switching unit that switches a connection circuit so that either of the power sources supplied from the network can be used, and the power source switching unit is configured to switch the power source unit by the power source switching unit when commercial power is supplied. When the telephone is switched so that it can be used and there is a telephone conversation between the elevator car and the monitoring center in the event of a power failure, line Switching to use power supplied from the network In addition, the auxiliary power supply of the power supply unit is switched so that it cannot be used. It is characterized by that.
[0028]
As a result, it is possible to receive power from the public telephone network that consumes a large amount of power, suppress consumption of the auxiliary power supply, and enable long-term use.
[0029]
The second invention monitors the operating state of the elevator, transmits various data to an external monitoring center via a public telephone line network, enables a call between the elevator car and the monitoring center, and further provides a power failure. In an elevator remote monitoring apparatus having a power supply unit equipped with an auxiliary power supply, the power supply unit and the public telephone circuit line A power source switching unit that switches a connection circuit so that either of the power sources supplied from the network can be used, and the power source switching unit is configured to switch the power source unit by the power source switching unit when commercial power is supplied. When a call is first made between the elevator car and the monitoring center at the time of a power failure, the public telephone line The power supply supplied from the network is switched so that it can be used, and when a call is made after the first call, the auxiliary power supply of the power supply unit is switched to use.
[0030]
As a result, power is received from the public telephone network only at the time of the first call, and is switched to the auxiliary power supply when the call is completed, so that consumption of the auxiliary power supply is suppressed and data communication at the time of the secondary disaster can be performed smoothly. it can.
[0031]
The third invention monitors the operating state of the elevator, transmits various data to an external monitoring center via a public telephone line network, enables a call between the elevator car and the monitoring center, and further provides a power failure. In an elevator remote monitoring apparatus having a power supply unit equipped with an auxiliary power supply, the power supply unit and the public telephone circuit line A power source switching unit that switches a connection circuit so that either of the power sources supplied from the network can be used, and the power source switching unit is configured to switch the power source unit by the power source switching unit when commercial power is supplied. In the case of a first call with the elevator car and the monitoring center at the time of a power failure, the power source switching unit switches the auxiliary power source of the power source unit to be usable, and the first If you are calling after a call to line It is characterized by switching to use the power supplied from the network.
[0032]
As a result, the power supply from the auxiliary power supply is stopped after the first call and used as a general telephone terminal device that receives power supply from the public telephone line network. Can handle power outages.
[0039]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS.
FIG. 1 is a block diagram of a main part of a remote monitoring terminal device 2 shown to explain a first embodiment of an elevator remote monitoring device according to the present invention, and the remote monitoring terminal device described in FIG. 2, a power supply switching unit 33 configured by an electromagnetic relay or the like is added.
[0040]
That is, the main power supply 28 is normally supplied from the power supply unit 27 to the digital circuit unit 10 and the voice control unit 13, and when the supply of commercial power supply is stopped due to a power failure, the auxiliary power supply of the power supply unit 27 is conventionally used. However, in the present invention, when it is detected that the supply of the commercial power supply is stopped due to a power failure, the power supply switching unit 33 is operated by the control of the digital circuit unit 10, and the audio control unit 13 is supplied. The connection of the power supply unit 27 is cut off (the supply of the auxiliary power supply 29 is cut off), and a connection circuit from the telephone line processing unit 11 to the voice control unit 13 is formed to connect the telephone line processing and the interphone 6 in the elevator car 3 The voice control is switched to be performed by a power source supplied from the public telephone line network 8.
[0041]
In general, telephones use telephones or dialing to supply power to public telephones. line It is covered by a DC 48V power source supplied from the network 8, and is supplied as a stable voltage during a call. Therefore, in the present invention, when the commercial power supply is interrupted, the public telephone circuit is used. line The DC 48V power supplied from the network 8 is reduced to a voltage (DC 5V) at which the voice control unit 13 can operate by a DC / DC converter or the like in the telephone line processing unit 11 and supplied to the voice control unit 13 The telephone call processing in the remote monitoring control is performed.
[0042]
Since such processing is executed under the instruction of the CPU 14 of the digital circuit unit 10, the processing flow will be described with reference to the flowchart shown in FIG.
[0043]
First, in step 1, it is detected whether or not a power failure occurs. The present invention is executed only at the time of power failure, and is not implemented when commercial power is normally supplied.
[0044]
When a power failure is detected, the process proceeds to Step 2, where it is confirmed whether the passenger is in a confined state in the elevator car 3, and if it is in a confined state, a notification condition is established and a call is issued to the maintenance company 9. Process information. When a building is out of power, passengers who have been using the elevator during that time are likely to be locked in the elevator car 3, so it is important to immediately notify the maintenance company 9.
[0045]
In step 3, it is confirmed that the telephone call can be normally made to the maintenance company 9. This detects whether the telephone line network 8 is in a normal state, and detects when the telephone line is disconnected due to a wide area disaster by the tone receiver circuit 22 in the telephone line processing unit 11. . If normal transmission cannot be performed in step 3, step 2 is continued.
[0046]
Next, the process proceeds to step 4, where it is confirmed whether or not the call can be connected to the maintenance company 9. If the call is connected, the power source switching unit 33 is operated in step 5 so line The power from the network 8 converted in the telephone line processing unit 11 is supplied to the voice control unit 13, thereby enabling a call.
[0047]
When the completion of the call is confirmed in step 6, the standby state is entered, and the operation state of the power supply switching unit 33 in step 5 is maintained until the recovery of the power failure is detected in step 7. When power failure recovery is detected in step 7, the process proceeds to step 8, where the power control is canceled, that is, the power switching unit 33 is returned to the initial state and the process is terminated.
[0048]
If commercial power is normally supplied, a power failure is not detected in step 1, so in this case, power control is canceled in step 8, that is, the remote monitoring terminal device 2 is operated with normal power. Needless to say.
[0049]
FIG. 3 shows a timing chart of the commercial power supply, the battery 29A, the power supply command, and the power supply control signal in the above processing flow. When commercial power is not supplied due to a power failure, auxiliary power is supplied from the battery 29A. For this reason, the CPU 14 can operate without being particularly aware of the power outage. However, if it is detected that the passenger is in the elevator car 3 during the power outage, the CPU 14 issues a notification command to the maintenance company 9. Execute. When the notification is normally made here, the power command in step 5 is output, and the power source switching unit 33 operates to supply power to the voice control unit 13 from the battery 29A based on the DC 48V power source from the public telephone line network 8. The power source is switched from the line processing unit 11. As a result, the processing related to the call can be made irrelevant from the state of the battery 29A.
[0050]
As described above, in the present invention, during the power outage period, the power source of the function that consumes a large amount of power, such as voice amplification processing during a call, is supplied from the public telephone line network, so that the auxiliary power source can be used effectively. it can. Further, even when a telephone call cannot be made for a long time in a wide-area disaster, since the auxiliary power source 29 is used only for the digital circuit unit 10, the consumption of the battery 29A can be reduced.
[0051]
Next, a second embodiment of the present invention will be described with reference to FIGS. In this embodiment, the power supply control unit 33 is operated for only the first call during a power failure, and the power supplied to the voice control unit 13 is used as the telephone line processing unit 11 based on the DC48V power supply from the public telephone line network 8. After that, the power is supplied from the battery 29A. As shown in FIG. 4, a register 34 is provided in the digital circuit unit 10 so that the number of calls during a power outage is stored in the call count register 35, and the power is supplied only when the number of calls in the call count register 35 is zero. This can be realized by controlling the control unit 33.
[0052]
The processing flow in this case is shown in FIG. 5, but the steps up to step 6 are the same as in FIG. 2, and the subsequent steps are different, so only the different portions will be described. That is, after the telephone call is completed in step 6, the process proceeds to step 8 to cancel the power control, that is, return the power switching unit 33 to the initial state and end the process.
[0053]
As described above, when the first telephone call at the time of a power failure is completed, the power is automatically returned to the auxiliary power supply 29, so that data communication when a secondary disaster occurs can be performed smoothly.
[0054]
Next, a third embodiment of the present invention will be described with reference to FIGS. In this embodiment, when a power failure occurs, the elevator car 3 to the maintenance company 9 uses the auxiliary power source 29 as before until the first rescue request call, and after the first call is completed, The power supply switching unit 33 is operated to switch the power supplied to the voice control unit 13 from the battery 29A to the power supply from the telephone line processing unit 11 based on the DC48V power supply from the public telephone line network 8. After this processing, the state is stored in the call register 36 of the register 34 shown in FIG. 4, and the operation of the digital circuit unit 10 itself is stopped. As a result, the digital circuit unit 10 becomes unusable, and only the interphone 6 installed in the elevator car 3 functions as a general telephone terminal device capable of communication connected to the maintenance company 9 via the public telephone line network 8. Will do. In other words, the intercom 6 operates as a telephone that enables only a call from the maintenance company 9.
[0055]
The processing flow of this embodiment is shown in FIG. 6. When a power failure state is detected in step 1, normal communication processing is executed in step 2. Then, in step 3, the completion of the first call after the power failure is detected, the result is stored in the communication register 36, and then the process proceeds to step 4. In step 4, the power source switching unit 33 is operated to switch the power supplied to the voice control unit 13 from the battery 29A to the power source from the telephone line processing unit 11 based on the DC 48V power source from the public telephone network 8. The unit 10 is stopped.
[0056]
The call register 36 maintains the saved contents until the power failure state is canceled, so that the state of step 4 is continued during the power failure. When power failure recovery is detected in step 5, the process proceeds to step 6 to cancel the power control, that is, return the power switching unit 33 to the initial state, and the process is terminated.
[0057]
In this embodiment, after a power failure and the first call for a rescue request from the elevator car 3 to the maintenance company 9, the power supply from the auxiliary power supply 29 is stopped and the power supply from the public telephone line network 8 is stopped. Since it is used as a general telephone terminal device, it is possible to make a call regardless of the capacity of the auxiliary power source and to cope with a long-time power outage.
[0058]
Next, fourth, fifth and sixth embodiments of the present invention will be described.
In the fourth embodiment, when power outages are widespread, rescue requests from a large number of elevators to the maintenance company 9 are expected to be concentrated. It provides a means for restricting calls and avoiding telephone line overflow. However, a call from the maintenance company 9 to the elevator car 3 is made possible, and power is supplied from the public telephone line network 8 during a call to reduce consumption of the auxiliary power supply 29.
[0059]
One means will be described as a fifth embodiment. By controlling the power supply on the remote monitoring terminal device 2 side by remote control from the maintenance company 9, it is impossible to make a call again from the elevator car 3 to the maintenance company 9. To do. The processing flow of this embodiment is shown in FIG. 7, for example, the process is the same up to step 4 in the third embodiment shown in FIG. Therefore, the illustration of the same portion is omitted, and the description will be made from the standby state thereafter.
[0060]
That is, step 1a in FIG. 7 is subsequent to step 4 in FIG. 6. When the telephone line processing unit 11 detects a call command from the maintenance company 9 to the elevator car 3, the auxiliary power supply 29 is restored in step 2a. The supply of the auxiliary power supply 29 is resumed to the digital circuit unit 10. Next, the process proceeds to step 3a to confirm the connection of the telephone line. In step 4a, the power supply switching unit 33 is operated to supply power to the voice control unit 13 during a call from the auxiliary power supply 29 from the public telephone line network 8. Switch to something. Then, after confirming the end of the call in step 5a, the state of the power source is kept as it is, and it waits for the next call command from the maintenance company 9.
[0061]
According to this embodiment, by operating switching of the power supply source of the remote monitoring terminal device 2 from the maintenance company 9, it is possible to reduce consumption of auxiliary power due to re-calling from the elevator car 3, It is possible to prevent the telephone line of the maintenance company 9 from overflowing due to re-calling. However, a call from the maintenance company 9 to the elevator car 3 is possible, and information provision to passengers is continued.
[0062]
Finally, the sixth embodiment will be described as another means for embodying the fourth embodiment. In this embodiment, the maintenance company 9 needs to make another call while waiting for a report from the elevator car 3 to the maintenance company 9 using the auxiliary power source 29 or a call from the maintenance company 9 to the elevator car 3. When it is determined that there is no communication, the communication circuit of the elevator car 3 is controlled so that re-calling is not possible. The communication circuit is controlled / returned by remote control from the maintenance company 9.
[0063]
The processing flow of this embodiment is shown in FIG. 8. For example, the maintenance company 9 communicates with the elevator car 3 during standby after the end of the call in step 6 in the first embodiment shown in FIG. When it is determined that re-calling is not necessary, a control command is issued from the maintenance company 9 to the call circuit of the elevator car 3 in step 1b (this command generally uses a DTMF signal in many cases). When the tone receiver circuit 22 of the telephone line processing unit 11 receives a call circuit control command from the maintenance company 9, the call circuit of the elevator car 3 is controlled in step 2 b and the elevator car 3 to the maintenance company 9. Disable reporting. That is, a procedure is added to the ROM 15 so that the CPU 14 of the digital circuit unit 10 does not accept a line connection request from the elevator car 3. Needless to say, as the next step, the maintenance company 9 issues a return command to the call circuit to cancel the state where the notification cannot be made.
[0064]
According to this embodiment, the load on the communication circuit during a wide-area disaster can be reduced, and the functions of the entire system can be improved by allowing other devices to communicate.
[0065]
【The invention's effect】
As described in detail above, according to the present invention, even in the event of a power outage over a long period of time such as a wide-area power outage, which has been regarded as a problem in recent years, a remote monitoring device reliably sends a rescue request from the elevator car side to an external monitoring center or maintenance company. Can communicate. In addition, by receiving power from a public telephone line network that consumes a large amount of power, consumption of the auxiliary power is suppressed and long-term use is possible. Since the battery 29A can be reduced in size, the remote monitoring terminal device itself can be reduced in size, and installation and maintenance work are facilitated. Furthermore, there is an advantage that the public telephone line network can be used effectively in a comprehensive manner.
[Brief description of the drawings]
FIG. 1 is a block diagram of a main part of a remote monitoring terminal device shown for explaining a first embodiment of an elevator remote monitoring device according to the present invention;
FIG. 2 is a flowchart showing a process flow of the first embodiment of the present invention.
FIG. 3 is a timing chart for explaining the first embodiment.
FIG. 4 is a block diagram of a main part of a remote monitoring terminal device shown for explaining a second embodiment of the present invention.
FIG. 5 is a flowchart showing a process flow of the second embodiment of the present invention.
FIG. 6 is a flowchart showing a flow of processing according to the third embodiment of the present invention.
FIG. 7 is a flowchart for explaining the flow of processing of the fourth and fifth embodiments of the present invention.
FIG. 8 is a flowchart showing a flow of processing according to a sixth embodiment of the present invention.
FIG. 9 is a block diagram showing a schematic configuration of a general remote monitoring system.
FIG. 10 is a block diagram showing a schematic configuration of a remote monitoring terminal device.
FIG. 11 is a block diagram illustrating an example of a power supply unit.
[Explanation of symbols]
1 Elevator machine room
2 Remote monitoring terminal device
3 elevator car
4 Elevator control device
5 Transmission line
6 Intercom
8 Public telephone network
9 Maintenance company (external monitoring center)
10 Digital circuit section
11 Telephone line processing section
12 Data transmission part
13 Voice control unit
27 Power supply
29 Auxiliary power supply

Claims (3)

Monitors the operating condition of the elevator, transmits various data to the external monitoring center via the public telephone line network, enables calls between the elevator car and the monitoring center, and provides an auxiliary power supply in case of power failure In an elevator remote monitoring device having a power supply unit,
A power supply switching unit for switching the connection circuit for use either power supplied from the public telephone line network and the power supply unit,
The power switching unit is switched so that the power source can be used by the power source switching unit when commercial power is being supplied, and when the telephone is in communication with the monitoring center and the elevator car during a power failure , the power supply with switches to use the power supplied from the public telephone line network by the switching unit, the remote monitoring device for an elevator, characterized in that switching so as not to be using the auxiliary power source of the power supply unit. Monitors the operating condition of the elevator, transmits various data to the external monitoring center via the public telephone line network, enables calls between the elevator car and the monitoring center, and provides an auxiliary power supply in case of power failure In an elevator remote monitoring device having a power supply unit,
A power supply switching unit for switching the connection circuit for use either power supplied from the public telephone line network and the power supply unit,
The power source switching unit is switched so that the power source unit can be used by the power source switching unit when commercial power is supplied, and is initially talking with the elevator car and the monitoring center during a power failure. in this case, together with the switches to the power supplied from the public telephone line network by the power switching unit can be used, the auxiliary power supply of the power supply unit in the case of a call after if you call to the first The elevator remote monitoring apparatus is characterized in that it is switched to use the elevator. Monitors the operating condition of the elevator, transmits various data to the external monitoring center via the public telephone line network, enables calls between the elevator car and the monitoring center, and provides an auxiliary power supply in case of power failure In an elevator remote monitoring device having a power supply unit,
A power supply switching unit for switching the connection circuit for use either power supplied from the public telephone line network and the power supply unit,
The power source switching unit is switched so that the power source unit can be used by the power source switching unit when commercial power is supplied, and is initially talking with the elevator car and the monitoring center during a power failure. in this case, along with switches to the auxiliary power source of the power supply portion by the power supply switching unit can be used, the power supplied from the public telephone line network in the case of a call after if you call to the first A remote monitoring device for an elevator characterized by switching to use.

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