JP6949362B2 - Power supply cutoff device - Google Patents

Description

The present invention relates to a power supply cutoff device that cuts off power supply to electric appliances such as electric stoves and lighting fixtures and indoor wiring in the event of an earthquake.

To prevent fires in the event of an earthquake, electric power companies have introduced systems to stop power transmission in each region. However, there is a risk of an energizing fire occurring when power transmission is resumed. That is, typically, when power transmission is stopped and power transmission is restarted while using an electric heating device such as an electric stove, a fire ignites from a combustible material that comes into contact with the electric heating device due to the influence of an earthquake.

In order to prevent such an energized fire, it is effective to switch the breaker of the distribution board to the shutoff state for each door in the event of an earthquake. However, it is not realistic in a situation where evacuation should be the highest priority.

Development of a distribution board that automatically shuts off the power supply in the event of an earthquake is in progress. However, it is not easy to replace the existing distribution board because of its huge number and cost burden.

Therefore, a device that can be attached to an existing distribution board has been proposed (Patent Document 1). This device connects a weight to the tip of the lever switch of the breaker via a string, and pulls down the lever switch by the impact force of the weight dropped from the pedestal when an earthquake of a certain seismic intensity or higher occurs to cut off the power supply. Is.

However, with such a device, the power supply is cut off immediately when an earthquake occurs, which makes it difficult to collect earthquake information on a television or the like, and when an earthquake occurs at night, it instantly goes dark. There was a considerable risk of inducing secondary accidents such as delays in escape and falls, and there were times when there was no time to pack up luggage for evacuation. Moreover, it was not possible to cut off the power supply before the vibration actually occurred due to the earthquake, and it was not possible to confirm whether or not the power supply was cut off on the go.

Japanese Unexamined Patent Publication No. 8-287812

The purpose is to provide a power supply cutoff device that makes it possible to easily introduce a power supply cutoff function and reduces secondary accidents associated with the power supply cutoff.

The power cutoff device according to the present embodiment is a switchboard or a switchboard having an earth-leakage circuit breaker for interrupting the power supply when an earth leakage occurs and a test button for simulating an earth-leakage state and confirming the operation of the earth-leakage circuit breaker. It can be attached to the distribution board. The device detects an earthquake with a predetermined seismic intensity or higher based on a pressing mechanism for pressing the test button, an acceleration sensor, and the output of the acceleration sensor, and tests after a predetermined time has elapsed from the time when an earthquake with a predetermined seismic intensity or higher is detected. It includes a control unit that drives a pressing mechanism to press the button.

FIG. 1 is a perspective view showing a power supply cutoff device according to an embodiment of the present invention and a distribution board on which the power supply cutoff device is mounted. FIG. 2 is a diagram showing an overall configuration of a power supply cutoff system including a power supply cutoff device according to an embodiment of the present invention. FIG. 3 is a diagram showing an example of an actuator for pressing a test button included in the power supply cutoff device according to the embodiment of the present invention. FIG. 4 is an equivalent circuit diagram of the power supply cutoff device according to the embodiment of the present invention. FIG. 5 is a flowchart showing the operation procedure of the RFIC of FIG. FIG. 6 is a flowchart showing another operation procedure of the RFIC of FIG. FIG. 7 is a flowchart showing still another operating procedure of the RFIC of FIG.

Hereinafter, the power supply cutoff device according to the present embodiment will be described with reference to the drawings. In the following description, components having substantially the same function and configuration are designated by the same reference numerals, and duplicate explanations will be given only when necessary.

As shown in FIG. 1, the power supply cutoff device 21 according to the present embodiment is provided so as to be mounted on a distribution board or a distribution board 19 installed in a building such as a general house. Here, the distribution board 19 will be described as an example. The distribution board 19 is equipped with an earth-leakage circuit breaker (earth-leakage breaker) 191 and a safety breaker 197 and a contract breaker (ampere breaker) (not shown). The earth-leakage circuit breaker 191 is a device that automatically shuts off the power supply by detecting the leakage of wiring and electric appliances in the building, and is a lever switch 193 so that the power supply state and the power cutoff state can be manually switched. Is provided. The lever switch 193 is located, for example, upward when the power is supplied, and downward when the power is cut off. A test button 195 is arranged directly under the lever switch 193. The test button 195 is a manual button for simulating an earth leakage state and confirming the operation of the earth leakage breaker 191. The safety breaker 197 is a device provided for each of a plurality of circuits divided in the building, and when the use of electricity exceeding the capacity, a short circuit, etc. is detected, only the circuit is cut off to prevent a power failure of the entire building. A lever switch 199 is provided for each circuit so that the power supply state and the power cutoff state can be manually switched for each circuit. A contract breaker is a device that cuts off when a current exceeding the amount of current contracted with an electric power company flows.

The power supply cutoff device 21 according to the present embodiment is fixed to the test button 195 of the distribution board 19 at an appropriate position with a screw or an adhesive, and the test button is used when an earthquake occurs or an Earthquake Early Warning is delivered. It has a function of pressing 195 to cut off the power supply. The proper position is that the power supply cutoff device 21 includes a push rod 227 that reciprocates in a direction perpendicular to the back surface of the housing 212, and is tested when the push rod 227 protrudes from the back surface of the housing 212. It means that it is a position where the button 195 can be pressed.

As shown in FIG. 2, the power supply cutoff device 21 according to the present embodiment is connected to a portable information processing terminal 15 represented by a smartphone via, for example, Bluetooth (registered trademark) as a short-range wireless standard. The portable information processing terminal 15 is connected to the Earthquake Early Warning distribution server 11 via the Internet line 13 which is a network based on the TCP / IP communication standard, and can receive the Earthquake Early Warning distribution. A short-range wireless communication network such as WAN or LAN is connected to the Internet line 13 via the gateway device 17, and the power supply cutoff device 21 according to the present embodiment is connected to the gateway device 17 by, for example, Bluetooth (registered trademark). Be connected. The gateway device 17 is also configured to be able to receive the Earthquake Early Warning from the Earthquake Early Warning distribution server 11 via the Internet line 13.

When the Earthquake Early Warning distribution server 11 receives the Earthquake Early Warning, the portable information processing terminal 15 and the gateway device 17 each generate a signal (specific signal) indicating that the Earthquake Early Warning has been distributed as a trigger. It is programmed to transmit wirelessly to the supply cutoff device 21.

The power supply cutoff device 21 according to the present embodiment is equipped with a pressing mechanism (actuator) for pressing the test button 195 of the distribution board 19. As a pressing mechanism, the cam 229 is directly connected to the drive shaft of the motor 225 as illustrated in FIG. The push rod 227 is urged in a direction of being inserted into the housing 212 by a coil spring (not shown). The rear end surface of the push rod 227 is engaged with the peripheral surface of the cam 229, and the tip portion of the push rod 227 is pushed out from the housing 212 and pushed back into the housing 212 by the coil spring in accordance with the rotation of the cam 229. The pressing mechanism is not limited to the structural example of FIG. 3, and any structure can be adopted.

FIG. 4 shows an equivalent circuit diagram of the power supply cutoff device 21 according to the present embodiment. For example, one or a plurality of batteries 221 are housed in the battery box 222 of the power supply cutoff device 21 as an internal power source. As the battery 221, a primary battery or a secondary battery conforming to the standard is used. The battery 221 is connected to the motor 225 of the pressing mechanism via the switching element 223. The switching element 223 is, for example, a P-channel MOSFET, but it does not deny the adoption of other types of transistors such as N-channel MOSFET and bipolar type. A power supply circuit (REG) 210 is connected to the battery 221. The power supply circuit 210 boosts the voltage Vcc of the battery 221 to a power supply voltage Vdd of, for example, 3.0 V for internal circuit operation. The comparator 218 is provided to detect a change in the load current accompanying the drive of the motor 225 due to the on / off of the switching element 223, and its inverting input terminal is connected to a connection node between the detection resistor 220 and the motor 225. The non-inverting input terminal is connected to the connection node between the voltage dividing resistors 214 and 224. That is, the voltage across the detection resistor 220 and the voltage across the voltage divider resistor 214 are input to the comparator 218. The voltage across the voltage dividing resistor 214 is a voltage obtained by dividing the battery voltage of the battery 221 by the voltage dividing resistors 214 and 224, and corresponds to a reference voltage (reference voltage). On the other hand, when the switching element 223 is in the ON state, a current flows through the detection resistor 220, and when the switching element 223 is in the OFF state, no current flows through the detection resistor 220. When the switching element 223 is in the ON state, the combination of the voltage dividing resistors 214 and 224 and the resistance values of the detection resistors 220 is adjusted in advance so that the detected voltage becomes higher than the reference voltage. The comparator 218 compares the detected voltage with respect to the reference voltage, and outputs a signal with a voltage level according to the comparison result. For example, when the detected voltage is equal to or higher than the reference voltage, a high level voltage is output, and when the detected voltage is lower than the reference voltage, a low level voltage is output. The high level indicates that the motor 225 is energized and the motor 225 actually operates. When the motor 225 operates continuously for the time required for the cam 229 to make one rotation, the test button 195 is pressed and the power supply is cut off. The comparator 218 constitutes a detection unit that detects that the motor 225 has operated together with the voltage dividing resistors 214 and 224 and the detection resistor 220. Detecting the energization of the motor 225 and confirming that the power supply is cut off by continuing it for a certain period of time is more than confirming that the power supply is cut off by keeping the switching element 223 on for a certain period of time. , It can be said that the reliability is high in principle.

The RFIC (radio frequency integrated circuit) 211 is a control circuit that functionally includes a communication unit, a drive signal generation unit, a control unit, and the like. The communication unit of the RFIC 211 connects to the external portable information processing terminal 15 and the gateway device 17 via the wireless communication antenna 213 according to a short-range wireless standard such as Bluetooth (registered trademark). A 3-axis acceleration sensor 217, a cancel button 215, a forced button 216, and a comparator 218 are connected to the control unit of the RFIC 211.

The control unit detects an earthquake with a predetermined seismic intensity, for example, a seismic intensity of 5 or higher, based on the output of the 3-axis acceleration sensor 217, and activates a timer at the time of detection. According to the timer output, the control unit turns on the switching element 223 and drives the motor 225 when a predetermined time such as 10 seconds has elapsed from the time when an earthquake with a predetermined seismic intensity or higher is detected, and the cam 229 rotates at least once to drive the motor 225. Press the test button 195. Of course, the elapsed time from the time when an earthquake with a predetermined seismic intensity or higher is detected until the switching element 223 is turned on can be set to an arbitrary time such as 5 minutes instead of a fixed time.

The control unit of the RFIC 211 receives a signal (specific signal) indicating that the Earthquake Early Warning distribution server 11 has distributed the Earthquake Early Warning from the portable information processing terminal 15 and the gateway device 17 via the antenna 213 and the communication unit. At that point, the timer is activated. The control unit turns on the switching element 223, drives the motor 225, and presses the test button 195 when a predetermined time such as 10 seconds has elapsed from the time when the specific signal is received according to the timer output. The control unit activates the timer at an early stage between the time when the specific signal is received and the time when the earthquake with the predetermined seismic intensity or higher is detected.

The cancel button 215 is a push button provided on the surface side of the housing 212 of the power supply cutoff device 21 and to be manually operated. During the timer operation, in other words, when the cancel button 215 is pressed during the elapse of a predetermined time such as 10 seconds from the time when the earthquake is detected, the control unit stops the timer. As a result, the on-switching control of the switching element 223, the driving of the motor 225, and the pressing operation of the test button 195 are cancelled. The force button 216 is a push button attached to the cancel button 215. When the forced button 216 is pressed during the timer operation, in other words, during the elapsed period of a predetermined time such as 10 seconds from the time when the earthquake is detected, the control unit immediately turns on the switching element 223, drives the motor 225, and tests. Press button 195.

When the control unit confirms that the power supply is actually cut off based on the output of the comparator 218, the control unit controls the communication unit to "power supply" to the portable information processing terminal 15 and the gateway device 17 via the antenna 213. Notification that the blocking is completed (blocking completion notification) "is sent.

When the portable information processing terminal 15 is located within the communication range of the power supply cutoff device 21, the portable information processing terminal 15 receives the cutoff completion notification directly from the power supply cutoff device 21. When the portable information processing terminal 15 is located outside the communication range of the power supply cutoff device 21, for example, when the user is out, the portable information processing terminal 15 indirectly from the power supply cutoff device 21 via the gateway device 17. Receive the blocking completion notification. When the portable information processing terminal 15 receives the cutoff completion notification, a "message indicating that the power supply cutoff is completed" is displayed. The owner of the portable information processing terminal 15 can confirm that the power supply is actually cut off even indoors or on the go.

FIG. 5 shows the operation procedure of the control unit of the RFIC 211. When a signal (specific signal) indicating that the Earthquake Early Warning has been delivered is received from at least one of the portable information processing terminal 15 and the gateway device 17 (step S01; Yes), the control unit of the RFIC 211 is at the time of the reception. Start the timer (step S03). Further, when the control unit detects an earthquake having a predetermined seismic intensity, for example, a seismic intensity of 5 or more based on the output of the 3-axis acceleration sensor 217 (step S02; Yes), the timer is activated at that time. The control unit activates the timer at an early stage between the time when the specific signal is received and the time when the earthquake with the predetermined seismic intensity or higher is detected. That is, in the present embodiment, the timer is activated when at least one of the condition for delivering the Earthquake Early Warning and the condition for the occurrence of an earthquake having a predetermined seismic intensity or higher are satisfied. When the control unit does not receive the specific signal (step S01; No) or does not detect an earthquake with a seismic intensity of 5 or higher (step S02; No), the control unit returns to the start and waits for them.

The control unit waits for the cancel button 215 to be turned on (process S04) and the forced button 216 to be turned on (process S05) during the timer operation period, that is, during the elapsed period of a predetermined time such as 10 seconds from the time when the earthquake is detected. When the cancel button 215 is not pressed (process S04; No) and the forced button 216 is not pressed (process S06; No), the control unit receives a predetermined time such as 10 seconds from the start of the timer (process S07). , The switching element 223 is turned on, the motor 225 is driven, and the test button 195 is pressed (step S08).

When the cancel button 215 is pressed and turned on during the timer operation period (process S04; Yes), the control unit stops the timer (process S05) and cancels the power supply cutoff. When the forced button 216 is pressed and turned on during the timer operation period (step S06; Yes), the control unit immediately turns on the switching element 223 and drives the motor 225 without waiting for the elapse of a predetermined time. The test button 195 is pressed (step S08).

The control unit detects the energization of the motor 225 based on the output of the comparator 218, and when the energization continues for a period corresponding to one rotation of the cam 229, that is, when the pressing of the test button 195 is detected (step S09, Yes). ), The communication unit is controlled to transmit "notification indicating that the power supply is actually cut off (blocking completion notification)" to the portable information processing terminal 15 and the gateway device 17 via the antenna 213 (. Step S10). A "message indicating that the power supply cutoff is completed" is displayed on the portable information processing terminal 15 that receives the cutoff completion notification directly from the power supply cutoff device 21 or indirectly via the gateway device 17. Will be done. The owner of the portable information processing terminal 15 can confirm that the power supply cutoff has been completed, whether indoors or on the go.

As shown in FIG. 6, a signal (specific signal) indicating that the Earthquake Early Warning has been delivered is received from at least one of the portable information processing terminal 15 and the gateway device 17 (step S01; Yes), and 3 When an earthquake having a predetermined seismic intensity, for example, a seismic intensity of 5 or more is detected based on the output of the axial acceleration sensor 217 (step S02; Yes), the timer may be activated. That is, the timer is activated when both the condition for delivering the Earthquake Early Warning and the condition for the occurrence of an earthquake with a predetermined seismic intensity or higher are satisfied. Avoid situations where the power supply is cut off due to unexpected vibrations, or where the power supply is cut off when an earthquake with a seismic intensity higher than the specified intensity does not actually occur even if an Earthquake Early Warning is delivered. Can be done.

Further, as shown in FIG. 7, the condition for delivering the Earthquake Early Warning may be excluded, and the timer may be activated when the condition for the occurrence of an earthquake having a predetermined seismic intensity or higher is satisfied. It does not require a connection between the portable information processing terminal 15 and the gateway device 17, and is useful when the power supply cutoff device 21 is used stand-alone.

It should be noted that the three types of programs according to the operation procedure of FIGS. 5 to 7 described above may be appropriately selected according to the user's instruction.

In this way, the power supply is not immediately cut off when the earthquake early warning is delivered or when an earthquake of a predetermined seismic intensity or higher actually occurs, but the power supply is cut off when a predetermined time has passed from that time. During that time, you can collect earthquake information, and you can have time to pack up the necessary luggage before evacuating. Furthermore, even if an earthquake occurs at night, it will not go dark instantly, and you will not be able to escape or fall. The risk of inducing a secondary accident can be suppressed. Further, since the power supply can be cut off by using the earthquake bulletin as a trigger, the power supply can be cut off before the vibration actually occurs due to the earthquake.

The power supply cutoff device 21 can be attached to the distribution board 19, a simple structure for pressing the test button 195 to achieve the power supply cutoff is adopted, and the battery is driven by the battery 221 according to the standard. Needless to say, the adoption of the above contributes to the ease of introduction.

Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, as well as in the scope of the invention described in the claims and the equivalent scope thereof.

11 ... Earthquake flash report distribution server, 15 ... Portable information processing terminal, 17 ... Gateway device, 21 ... Power supply cutoff device, 195 ... Test button, 210 ... Power supply circuit, 211 ... RFIC (high frequency integrated circuit), 212 ... Housing , 213 ... Wireless communication antenna, 214,224 ... Pressure dividing resistor, 215 ... Cancel button, 216 ... Forced button, 217 ... 3-axis acceleration sensor, 218 ... Comparator, 220 ... Detection resistor, 221 ... Battery, 222 ... Battery box , 223 ... Switching element, 225 ... Motor.

Claims (7)

A power cutoff that can be attached to a switchboard or distribution board that has an earth-leakage circuit breaker for shutting off the power supply when an earth leakage occurs and a test button for simulating an earth-leakage state and confirming the operation of the earth-leakage circuit breaker. In the device
A pressing mechanism for pressing the test button and
Accelerometer and
A control unit that detects an earthquake of a predetermined seismic intensity or higher based on the output of the acceleration sensor and drives the pressing mechanism to press the test button after a predetermined time has elapsed from the detection time of the earthquake of the predetermined seismic intensity or higher. Equipped with
A communication antenna for communicating with an external portable information processing terminal,
Further provided with a detection unit for detecting the drive of the pressing mechanism.
The power cutoff device is characterized in that the control unit transmits a notification indicating the completion of cutoff of the power supply to the portable information processing terminal based on the detection result of the detection unit. It also has a cancel button that is manually operated.
The power cutoff device according to claim 1, wherein the control unit cancels the drive of the pressing mechanism when the cancel button is operated. It also has a forced button that is manually operated.
The power cutoff device according to claim 1, wherein the control unit immediately drives the pressing mechanism when the forced button is operated. The power cutoff device according to claim 1, further comprising a battery box for storing batteries as an internal power source. Prior Symbol controller, the communication antenna via upon receiving a specific signal transmitted to the portable information processing terminal end or al EEW as a trigger, the predetermined seismic intensity more seismic and reception time of said specific signal The power cutoff device according to claim 1, wherein the pressing mechanism is driven to press the test button after the elapse of the predetermined time from an earlier time than the detection time of the above. Before SL control unit receives a specific signal transmitted as a trigger the mobile information processing terminal end or al EEW via the communication antenna, when and detects the predetermined seismic intensity or earthquake, the The power cutoff device according to claim 1, wherein the pressing mechanism is driven to press the test button. A power cutoff that can be attached to a switchboard or distribution board that has an earth-leakage circuit breaker for shutting off the power supply when an earth leakage occurs and a test button for simulating an earth-leakage state and confirming the operation of the earth-leakage circuit breaker. In the device
A pressing mechanism for pressing the test button and
A communication antenna for communicating with an external portable information processing terminal or gateway device,
When a specific signal transmitted from the portable information processing terminal or the gateway device as a trigger is received via the communication antenna, the test button is pressed after a predetermined time has elapsed from the time when the specific signal is received. A control unit for driving the pressing mechanism is provided for the operation.
Further provided with a detection unit for detecting the drive of the pressing mechanism.
The power cutoff device is characterized in that the control unit transmits a notification indicating the completion of cutoff of the power supply to the portable information processing terminal based on the detection result of the detection unit.

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