KR100809373B1 - Automatic Rescue Circuit of Elevator - Google Patents

Abstract

The present invention relates to an automatic rescue operation circuit for elevators, and more particularly, a sensing unit for detecting abnormality information of each safety circuit from various safety circuits mounted in an elevator; A processor configured to determine an operation of the elevator based on the information detected by the detector; And it is an elevator automatic rescue operation circuit comprising a drive unit for driving the elevator up and down in response to the command issued from the processing unit, when the elevator stops between floors due to a safety circuit abnormal detection failure, a system error, etc. It is to carry out rescue operation of passengers, and it can be attached to the elevator already installed regardless of the type of rope elevator or hydraulic elevator, and it can be quickly and promptly by the manager of the elevator without the dispatch of the elevator maintenance specialist or 119 rescue personnel. The goal is to provide an automatic elevator rescue circuit that allows the passengers to be rescued safely.

Elevator, Lift, Auto, Rescue, Rescue, Circuit, Interlayer, RD, Driving, Driving, Safety, Emergency, Rescue Device

Description

Automatic Rescue Circuit of Elevator

1 is a conceptual diagram showing the configuration of an elevator.

2 and 3 are block diagrams showing an embodiment to which the structure circuit according to the present invention is applied.

4 is a detailed circuit diagram showing a structure circuit according to the present invention.

Explanation of symbols on the main parts of the drawings

1: car 2: car door

3: exterior door 4: hoist

5: counterweight 6: control unit

7: detection plate

LUS: High-level detection sensor LDS: Low-level detection sensor

100: rescue circuit 110: detector

120: processor 130: drive unit

The present invention relates to an automatic rescue operation circuit of an elevator, and more particularly, a circuit capable of driving an elevator to rescue an occupant safely by driving the elevator car with a simple operation when the elevator stops between floors in an intermediate position between the upper floor and the lower floor. Is to provide.

An elevator is an important structure that can be installed in a building to move quickly in the vertical direction.

In general, the elevator as shown in Figure 1 is a car (car) 1, the passenger to board the car, the hoist (4) for operating the car up and down, guide rails (guide tracks), to reduce the load of the hoist Counterweight (counter weight: 5) moving relative to the weight, by connecting the car (1) and the counterweight (5), a wire rope (hang) to the pulley of the hoist (4), and a control unit for controlling the above-mentioned elevator It consists of (6).

The power to be applied to the hoist of the elevator is AC and DC, AC is a three-phase induction motor, DC is to install a motor generator for each elevator to supply the DC voltage to the DC motor of the hoist to drive. In the invention, an alternating current equation is described as an example.

In addition, there are a driving method of an elevator, a driving method by a driver, an automatic type, a method of switching to an automatic type when a driver drives and a spare time, a type of automatic driving in a normal time, and a method of driving a driver in a special case. Some have adopted a full automatic military control system.

Although elevators are equipped with many safety devices, they often encounter safety accidents.

However, in most safety accidents, the car 1 stops at an arbitrary position due to a slight failure unless the physical mechanical configuration is broken.

Among various safety devices mounted on the elevator, there is a governor that automatically brakes and stops the elevator car if the speed is over a certain range than the specified speed when the rope is released or rewound.

In addition, the elevator is equipped with various safety switches (limit switches, etc.) and sensors to detect an abnormality before the car 1 reaches the lowest or uppermost floor, generate an electrical signal, and give a command to the control unit 6, and to the command. Therefore, the car (1) of the elevator is to reduce the speed to stop.

In other words, when one of the various limit devices and sensors of the safety device generates an electrical signal during an unexpected operation, the car 1 of the elevator is unconditionally stopped, and the reason for the stop is usually a minor reason. In this case, when the governor or brake system is unlocked, it is possible to operate normally.

On the other hand, failures that occur during the operation of an elevator can occur, for example, between floors in the event of a system failure, safety circuit (safety devices, such as sensors) operation, or a power outage without physical damage to the elevator. It stops in the middle of.

As described above, when the car 1 of the elevator stops between floors as shown in Fig. 1, the passengers feel extreme anxiety, and the trapped passengers try to escape forcibly and have a secondary accident or death accident. There was a serious problem that could result.

On the other hand, among the elevators currently installed, there is a special elevator without a machine room, and these special elevators are equipped with a rescue operation device called an oscillation braking device.

The operation method is to turn off the main power and switch the oscillation braking switch to maintain the U, V, W three phases of the motor in the common state, and to apply the brake (brake) to the brake (manual lever and Using emergency power battery) When opened, the heavy side descends due to gravity.

The speed remains constant, but at very slow speeds (below 3.6m / min), it does not move continuously and repeats its movements and stops, so trapped passengers feel extremely frightened.

Even if it is normally operated, it takes a very long time to be rescued, and the balance loads of elevators and counterweights are different from company to company, so it is often not possible to operate normally depending on the number of passengers.

On the other hand, regardless of whether the type of safety accidents in the elevator are minor or serious, the safety of the occupants is the first priority, and rescue workers are forced to open the door and rescue the occupants by using physical force.

However, when applying such excessive physical force to the elevator, the outer door 3 and the car door 2 of the car are damaged and the cost and recovery time are very long to recover and the noise generated when the physical force is applied. Is a more threatening noise to the passengers.

On the other hand, even if the outside door (3) and the car door (2) of the car (1) is forcibly opened by physical force, it is ambiguous whether to escape upstairs or downstairs in the state of being stopped halfway between floors. The process is very dangerous.

On the other hand, whenever an elevator stopped due to a systemic error, there were frequent cases of requesting 119 rescue workers, and there was a closure that 119 rescue workers could not be placed where needed.

The present invention is to provide an automatic elevator rescue circuit that can solve the above problems.

According to the present invention, when an elevator car stops between floors due to a system error of an elevator, a safety circuit operation, or a power failure, rescue workers quickly move to the nearest floor without applying a physical external force to the car. It is an object of the present invention to provide an elevator automatic rescue operation circuit for driving and safely rescued occupants.

Another object of the present invention is to provide an elevator automatic rescue operation circuit that can be mounted to rescue the occupant regardless of the elevator type (rope, hydraulic) and the manufacturer of the elevator.

In order to achieve the above object, an embodiment of the present invention, the rescue operation start unit is a rescue operation (RD) rescue operation by the emergency stop switch and the rescue operation switch key switch; Detection unit for detecting the presence or absence information of each safety circuit from the various safety circuits mounted on the elevator; A processor configured to determine a signal of a rising or falling operation of the elevator based on the information detected by the detecting unit; And a driving unit in which the elevator is driven up or down in response to a signal from the processor.

Configuration examples for effectively implementing the object of the embodiment, the processing unit, ED (Emergency Driving) unit for detecting the presence or absence of the safety device from each of the safety devices basically installed in the elevator; A car doors sensor (CDS) unit detecting whether the elevator car door is opened; A hall door sensor (HDS) unit detecting whether the elevator outer door is opened; A manual driving prohibition unit for preventing elevator operation from another operation panel of the elevator so that only the rescue operation of the rescue driver is performed when the rescue driving unit is started; A lowering driving prohibition section for prohibiting the lowering of the elevator when any one of the governor switch, the safety device switch, and the rope sag detection switch is detected as an abnormal signal; A lowering driving unit for lowering the elevator when the key switch operation of the rescue driver is a lowering operation, the lowering driving prohibition unit is a signal capable of the lowering operation, and a signal of the DZ level detection unit of the elevator car is not detected; And when the lowering operation prohibition unit is a rising operation of a key switch operation of the rescue driver regardless of the "lowing operation prohibition signal" or "lowing operation enable signal", and the signal of the DZ level detection unit of the elevator car is not detected It is effective to be configured;

Another configuration example for effectively implementing the object of the embodiment, the DZ level detection unit, the detection plate is disposed on one side of each of the hoistway of the car, each plate disposed; And a low-level detection sensor (LDS) and an upper-level detection sensor which are disposed vertically apart from the car of the elevator and detect whether the detection plate is at a level position where the door (car door and outer door) of the car can be normally opened. It is effective to detect whether or not the car has reached the normal level (LUS).

Another configuration example for effectively realizing the object of the embodiment is a signal in which the signal of the DZ level detection unit is located at a normal level, and when an operation signal of an open button is present, an outer door and a car door are opened. Door opening signal; it is effective that further comprises.

In another configuration example for effectively realizing the object of the embodiment, it is effective that an announcement broadcast is transmitted when the RD structure operation is performed.

Elevators are equipped with a number of stabilizers to ensure the occupant's safety against unexpected accidents, and various safety devices must be installed and constructed as described below.

(1) Cars that do not move unless all doors of the car and hoist are closed.

(2) On floors where the car is not stationary, a device that does not allow access to the hoistway from the outside unless a special key is used.

(3) In the case of the operator operating by operating the switch, the device automatically stops the car when the operator stops the operation.

(4) Devices capable of interrupting power in and on the car.

(5) When the speed of the car is abnormally increased, the device that automatically cuts off power within the range that the speed of every minute does not exceed 1.3 times the rated speed (63m / min for elevators whose rated speed is 45m / min or less).

(6) Apparatus for automatically restraining rotation of the motor by inertia when power is interrupted.

(7) When the descending speed of the car exceeds the speed at which the equipment specified in (5) above operates, the speed of every minute is 1.4 times the rated speed (68 m / min for elevators with rated speed of 45 m / min or less). A device that automatically restrains the descent of a car within the limit.

(8) A device for automatically controlling and stopping the lifting of the car within the range that does not collide with the floor of the car or the balancing hoist.

(9) Apparatus for alleviating impact when a car or counterweight strikes the floor of the hoistway at the speed at which the apparatus specified in (7) above operates.

(10) A device capable of making a call from the inside of the car to the outside in an emergency such as a power failure.

(11) Apparatus for automatically disconnecting power when the main rope is relaxed in a hoisting elevator.

(12) Devices that sound alarms and automatically stop the closing of doors when the loading load is exceeded (the operating value of this device is 105 to 110% of the rated loading load as standard).

(13) Preliminary lighting equipment capable of securing illuminance of 1 lux or more by measuring on a vertical plane 2 m away from the center of the lamp during a power outage.

(14) In the manner in which the landing door is opened by interlocking with the car door, a device for automatically applying a force toward the closing door of the landing door.

(15) A device for preventing the car from traveling in reverse when the power phase changes.

(16) Lift direction overspeed prevention devices that can protect against the risk of injury to passengers due to failure of elevator control system, brakes and components which influence car speed in the upward direction.

(17) The elevator control system, or brake failure of the actuator, may cause uncontrolled operation of the car in the landing zone without locking the landing door, and as a result, the passenger may be protected against the risk of injury. , A device that can detect an uncontrolled movement and completely stop the car before the car moves 1,200mm from the platform.

(18) In normal operation mode, when the door switch contact is shorted or artificially shorted at any of the car doors or landing doors within the range of the landing section, it detects this and forcibly stops the lift operation.

Hereinafter, the present invention configured as described above will be described in detail.

2 and 3 are block diagrams showing an embodiment to which the structural circuit according to the present invention is applied, and FIG. 4 is a detailed circuit diagram showing the structural circuit according to the present invention.

The rescue circuit 100 according to the present invention includes a detector 110 for detecting information obtained from various safety circuits mounted on an elevator, and a processor 120 for determining the operation of an elevator by receiving the information obtained from the above-described detector 110. And a driving unit 130 for driving the elevator according to the instruction issued from the processing unit 120.

Figure 2 is an embodiment showing a rope-type elevator, Figure 3 is an embodiment showing a hydraulic elevator.

That is, the above-described structure circuit 100 according to the present invention is used by mounting any type of elevator, the basic configuration of driving the elevator is used as it is in a general elevator bar detailed description according to the configuration and driving of the elevator is omitted. do.

Detailed configuration of the structure circuit 100 according to the present invention will be described with reference to the accompanying drawings, FIG.

In the following description of the structural circuit 100, "ON" means the circuit is closed, "OFF" means that the circuit is open.

In addition, the above-described rescue circuit 100 further includes a rescue operation start unit 140 for controlling to start rescue operations as shown in FIG. 4.

The above-mentioned rescue operation start unit 140 includes an emergency stop switch and a rescue operation switch key switch, the emergency stop switch is installed together with the rescue operation device, and the above-described rescue operation switch key switch is an elevator manager. It is intended to work by.

That is, the emergency stop switch is turned on and the rescue device (RD) rescue operation is started only when the key switch for rescue operation switching is turned on by the administrator.

In addition, the above-mentioned rescue operation start unit 140 simultaneously transmits a guide broadcast informing that the rescue operation is started and the rescue operation is started, and the broadcast is provided to the occupant of the elevator and the rescue is performed in what state and in what process. It tells you if the process will happen.

The detector 110 includes a door zone (DZ) level detector 111, an OP (open) door open signal unit 112, and an SD deceleration start unit 114.

The above-described DZ level detection unit 111 is disposed above the lower level detection sensor LDS and the upper level detection sensor LUS in the vertical direction on the upper part of the car 1 of the elevator, and the car 1 of the elevator. As shown in FIG. 1, a detection plate 7 is provided at each side of the hoistway in which the hoist is raised and lowered, thereby detecting the position when the car 1 of the elevator has stopped at a normal level. It is linked with 140.

That is, the DZ level detection unit 111 is “ON” only when both the low-level detection sensor LDS, the high-level detection sensor LUS, and the rescue operation start unit 140 are “ON”.

In addition, the above-described DZ level detection unit 111 may further include a lamp and an alarm, and may display an alarm for a predetermined time by a timer while displaying the display lamp "ON", and the lamp and the alarm sound are rescue operators. To let them know audio-visually so that they can operate the open button.

In particular, when the car 1 arrives at the level, the rescue driver sends out an announcement to the occupant that the door will open soon before opening the door (car door and outer door).

In addition, the above-described OP door opening signal unit 112 causes the car door 2 and the outer door 3 to open when the DZ level detection unit 111 is "ON" and the open button is "ON". .

The above-described OP door opening signal unit 112 simultaneously transmits the door opening announcement broadcast (see 113) so that the user can hear the voice audibly and know that the door will open soon.

The above-described SD deceleration start section 114, if any one of the low-level detection sensor (LDS) and the high-level detection sensor (LUS) generates a detection signal, the rising and falling speed of the car 1 starts to decelerate. To stop soon.

The processing unit 120, the ED (Emergency Driving) unit 121, the CDS (car doors sensor) unit 122, the HDS (hall door sensor) unit 123, the manual driving prohibition unit 124, the prohibition of driving down The unit 125, the lower driving unit 126, and the rising driving unit 128 are included.

The ED unit 121 is to operate the elevator up and down by force if the rescue operation start unit 140 is "ON" even if any of the safety circuits basically installed in the elevator are not normally operated. .

The above-mentioned CDS unit 122 is to force the rescue operation if the car door 2 of the car 1, when the rescue operation start unit 140 is "ON" even if the electrical signal does not operate normally.

In addition, the above-described HDS unit 123 is to force the rescue operation if the external door (3), even if the electrical signal does not operate normally, if the rescue operation start unit 140 is "ON".

In the above-described ED unit 121, each safety circuit means that safety is in charge when the car 1 moves up and down among various safety circuits installed in the elevator, and the CDS unit 122 and the HDS described above. The part 123 means a circuit which detects abnormality (open state) of the car door 2 and the outer door 3 of the car 1.

The manual operation prohibition unit 124 described above, if the above-mentioned rescue operation start unit 140 is "ON", secures the control right of the elevator and prohibits the manual operation of the third party, and other control panel or manual operation other than the administrator of the rescue operation. The operation panel does not allow operation, and only the rescue driver has control of the elevator.

The above falling operation prohibition unit 125 detects a rope sag detection S / W, a governor S / W, and a safety device S / W among various safety devices basically installed in an elevator in a rope type elevator. Is detected as an abnormal signal, even if the rescue operation is started in the rescue operation start unit 140, the falling operation is prohibited.

On the other hand, when performing rescue operation (RD) rescue operation in a hydraulic elevator, the plunger limit switch function is maintained among the various safety devices installed in the elevator to prevent an unexpected unexpected accident risk.

In addition, if the falling operation prohibition unit 125 is "ON", the warning lamps emit light at the same time to indicate that the dangerous state.

In the above-described down operation part 126, the energization circuit is closed by the operation of the rescue operation key switch, the manual operation prohibition part 124 is "ON", the down operation prohibition part 125 is "ON", and DZ When the level detection unit 111 is "OFF" and the lowest level detection sensor DL is "ON", the driving is performed in a descending manner, and the passengers can listen to the guidance broadcast that the driving is being performed.

In the above-mentioned rising driving unit 128, the energization circuit is closed by the operation of the rescue operation key switch, the manual driving prohibiting unit 124 is "ON", the DZ level detecting unit 111 is "OFF", and the highest level. When the detection sensor UL is "ON", the vehicle is driven up and the passengers can hear the announcement that the driver is up.

The driving unit 130 described above includes a deceleration command unit 131, a falling command unit 132, and a rising command unit 133.

The deceleration command unit 131 described above decelerates when the above-described SD deceleration start unit 114 detects a signal during the constant speed operation of the car 1 of the elevator.

The lowering command unit 132 described above lowers the car 1 of the elevator in response to the signal of the lowering driving unit 126 described above.

The elevating command unit 133 described above raises the car 1 of the elevator in response to the signal of the elevating driving unit 128 described above.

Hereinafter, the operation and operation of the present invention will be described with reference to the accompanying drawings.

When the elevator stops due to an unknown cause, the control panel of the elevator control room (or the management room, security room, engine room, electrical room, station room, etc.) can tell the cause of the stop or which sensor (detection part) causes an error signal. have.

In the control room of the control room, the manager who manages the elevator is always on duty, and when the control panel reports an abnormal signal, the manager checks the failure of the elevator to determine what action to take.

There are many errors in operating an elevator, but most of them are stopped by systemic errors rather than physical defects.

In the control panel described above, a signal for self-diagnosis is received from each safety circuit provided in the elevator, and whether the received determination value is normal or an error is displayed.

If the error check result is determined to be solved by simple measures, RD (Rescue Device) rescue operation is performed.

In particular, the RD (Rescue Device) rescue operation 140 is to enable the RD rescue operation 140 to operate only by inserting a special key to operate the key switch for switching the rescue operation so that unauthorized third parties can not operate arbitrarily.

In conjunction with the inverter control circuit of the control panel (key) to switch to the RD rescue operation (140: RD mode), and receives the control of the control panel, and then control the control panel and elevator manual operation operation panel to be inoperable.

In addition, while performing the RD rescue operation 140, and sends a guide broadcast to start the rescue operation to the occupants.

In addition, the minimum required safety circuit and car door circuit are switched to a common state, and the RD structure operation controls only the operation of the key switch for the up / down operation.

In other words, all the electric safety circuits and mechanical safety devices are ignored because the oscillation brake rescue device currently operated in MRL elevator must be operated after the main power is "OFF" from the beginning.

The minimum safety circuit described above includes an upper and lower final limit switch, a direction limit switch, and a forced deceleration switch, and these switches are used for the excess of the elevator while the car 1 of the elevator approaches the uppermost floor or the lower floor. It is to prevent driving.

On the other hand, the function of the plunger limit switch is maintained in the hydraulic elevator.

In addition, the landing sensor (landing sensor / inductor switch) function is maintained to detect the level, if the signal is detected in any one of the upper-level detection sensor (LUS) and the lower-level detection sensor (LDS) deceleration operation 114 If a signal is detected by both the upper-level detection sensor (LUS) and the lower-level detection sensor (LDS), the car 1 is positioned within the normal level range so that the car cannot be moved up or down. Is configured.

As described above, in operation of the elevator, rescue operation is carried out while maintaining only a minimum safety circuit, and the sequence of the rescue operation is as follows.

first. Inform the passenger trapped in the elevator by the intercom to perform rescue operation (or voice guidance broadcast output), and then perform the RD rescue operation 140 as follows, and guide the passenger according to the RD rescue operation while calming the passenger with the intercom until the passenger is rescued. Do

second. Rescue operation is operated only when the key switch is changed from NOMAL to RD mode with a specially manufactured key. The elevator switch is operated up / down by operating the key switch with a specially designed key (automatic return type). .

third. If an abnormal signal is detected on the rope sag detection switch, governor switch or safety device switch, the descent operation is prohibited (see 125), the descent operation prohibition warning lamp is lit and the descent operation is not possible. Done.

fourth. When reaching the level, a warning lamp (ON when reaching the level) and a buzzer (approximately 3 seconds of operation) inform the rescue operator of the arrival of the elevator level.

fifth. When the buzzer alarm is stopped, the car door open button is operated to automatically open the car outer door 3 and the car door 2 to rescue the passengers.

Sixth. When the passenger is rescued, the outer door 3 and the car door 2 of the car of the elevator are automatically closed and switched to the dormant state.

That is, in the elevator equipped with the elevator automatic rescue operation circuit according to the present invention, as described above, the RD rescue operation is simple, so that everyone is easy to operate and the rescue time is short.

On the other hand, when the RD rescue operation elevator is operated, the time required to start the ascending or descending operation to reach the level at which the outer door 3 and the car door 2 can be normally opened is further shortened. You can quickly rescue the passengers.

When explaining the reason why the time taken for rescue is short compared with the conventional rescue circuit or rescue device in more detail, the elevator is raised or lowered by the manager's key switch operation, which is very slow (3.6M / MIN). It takes a very long time to repeat the stop after moving a certain distance hereinafter), but the present invention is because the car of the elevator starts to move and continue to operate as long as there is no error in the extreme safety circuit.

The above extreme safety circuit means the upper and lower final limit switches, the direction limit switches, and the forced deceleration switch, the governor switch, the safety device switch, and the rope stretch detection switch.

In addition, as described above, the elevator automatic rescue operation circuit according to the present invention is applicable to the mounting regardless of the rope-type elevator and hydraulic elevator.

Although the present invention has been described in detail only with respect to the specific examples described, it will be apparent to those skilled in the art that various modifications and variations can be made within the technical scope of the present invention, and such modifications and variations belong to the appended claims.

The elevator automatic rescue operation circuit according to the present invention can be mounted regardless of the rope type elevator and the hydraulic elevator as described above.

In addition, it is possible to rescue passengers more quickly by forcibly operating the elevator while maintaining the function of the minimum safety circuit necessary for the operation of the elevator.

In addition, due to the passenger trapped in the elevator, the dispatch request of 119 rescue personnel can be significantly reduced.

In addition, it is possible to quickly rescue the passengers without physical damage to the outer door and the car door of the elevator, the passengers will be less psychologically anxious.

In particular, by not applying a physical external force to the outer door and the car door of the elevator to reduce the material loss to a minimum, it is possible for the elevator to operate in a shorter time.

Claims (5)

A rescue operation start unit configured to perform a rescue device (RD) rescue operation by an emergency stop switch and a rescue switch switch key; Detection unit for detecting the presence or absence information of each safety circuit from the various safety circuits mounted on the elevator; A processor configured to determine a signal of an elevator up or down operation based on the information detected from the detector; And A driving unit for driving the elevator up or down according to the signal from the processing unit; Elevator automatic rescue operation circuit comprising a. The method of claim 1, The processing unit, An ED (Emergency Driving) unit for detecting an abnormality of the safety device from each safety device installed in the elevator; A car doors sensor (CDS) unit detecting whether the elevator car door is opened; A hall door sensor (HDS) unit detecting whether the elevator outer door is opened; A manual operation prohibition unit for preventing elevator operation from another operation panel of the elevator so that only the rescue operation of the rescue driver is performed when the rescue operation unit is started; A lowering driving prohibition section for prohibiting the lowering of the elevator when any one of the governor switch, the safety device switch, and the rope sag detection switch is detected as an abnormal signal; A lowering driving unit for lowering the elevator when the key switch operation of the rescue driver is a lowering operation, the lowering driving prohibition unit is a signal capable of the lowering operation, and a signal of the DZ (Door Zone) level detecting unit of the elevator car is not detected; And Regardless of the "descent operation prohibition signal" or the "descent operation enable signal", the descent operation prohibition unit lifts the elevator when the key switch operation of the rescue driver is an up operation, and a signal of the DZ level detection unit of the elevator car is not detected. Lift driving unit; Elevator automatic rescue operation circuit composed of. The method of claim 2, The DZ level detector, A detection plate disposed on one side of the hoistway of the car and disposed on each floor; And The low-level detection sensor (LDS) and the upper-level detection sensor (LUS) which are disposed vertically apart from the car and detect the detection plate and detect whether the door is at a level position where the door (car door and outer door) of the car can be normally opened. ; Elevator automatic rescue operation circuit is detected whether the car has reached the normal level, including. The method of claim 3, The signal of the DZ level detection unit is located at a normal level, and an OP (Open) door opening signal unit for opening an outer door and a car door when an operation signal of an open button is received; The elevator automatic rescue operation circuit is configured to include more. The method of claim 3, An elevator automatic rescue operation circuit further comprising the announcement of an announcement when the RD rescue operation is performed.

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