KR20230083310A - Elevator car speed monitoring device and elevator car speed monitoring system - Google Patents

Abstract

An elevator car overspeed monitoring device and an elevator car overspeed monitoring system capable of providing a mechanism for releasing a restrained state of an elevator car without complicating the configuration. An elevator car overspeed monitoring device uses a signal output from a position detector provided in an elevator hoistway to create information indicating the location of an elevator car, and information indicating the location of the car and information indicating the speed of the car An overspeed detection unit that detects that the speed of the car is higher than the prescribed speed according to the position of the car, and an overspeed condition in which the car is stopped when the overspeed detection unit detects the overspeed condition of the car When it detects that the state of the signal output from the position detector has changed in a state where the car is restrained by the restraint control unit, the restraint control unit is provided with a restraint release unit for releasing the state in which the car is restrained. did.

Description

Elevator car speed monitoring device and elevator car speed monitoring system

The present disclosure relates to an elevator car overspeed monitoring device and an elevator car overspeed monitoring system.

Patent Document 1 discloses an elevator car overspeed monitoring device. When the car speed monitoring device is in an overspeed state where the speed of the car is faster than the prescribed speed, the car is kept in a restrained state.

Patent Document 1: Japanese Patent No. 4575076

However, the car overspeed monitoring device does not include a mechanism for releasing the restrained state of the car. If the mechanism is provided, an interface for transmitting a signal releasing the car from the restrained state is required. For this reason, it is not possible to provide a mechanism for releasing the restrained state of the car without complicating the configuration.

This disclosure was made in order to solve the above-mentioned problems. An object of the present disclosure is to provide an elevator car overspeed monitoring device and an elevator car overspeed monitoring system capable of providing a mechanism for releasing a restrained state of a car without complicating the configuration.

An elevator car overspeed monitoring apparatus according to the present disclosure creates information indicating the position of an elevator car by using a signal output from a position detector provided in an elevator hoistway, and includes information indicating the position of the car and an overspeed detection unit that detects an overspeed condition in which the speed of the car is higher than a prescribed speed according to the position of the car by using information indicating the speed of the car; and an overspeed condition of the car by the overspeed detection unit When detecting a change in the state of the signal output from the position detector in the state where the car is stopped by the restraining control unit for putting the car in a restrained state, and the restraining control unit, The restraint control unit is provided with a restraint release unit releasing a state in which the car is restrained.

An elevator car overspeed monitoring system according to the present disclosure includes a position detector provided in a hoistway of an elevator and outputting a signal according to a position of the elevator car, and using a signal output from the position detector to determine the speed of the elevator. A car speed monitoring device for generating information indicating the position of the car is provided.

According to the present disclosure, the restraint release unit releases the restrained state of the car to the restraint control unit based on a signal output from the position detector when the car is restrained. For this reason, it is possible to provide a mechanism for releasing the restrained state of the car without complicating the configuration.

1 is a diagram showing an elevator system to which an elevator car overspeed monitoring system according to Embodiment 1 is applied.
Fig. 2 is a block diagram of an elevator car overspeed monitoring device according to the first embodiment.
3 is a block diagram of an elevator car overspeed monitoring device according to the first embodiment.
4 is a diagram showing an example of a release pattern of a signal input to the car overspeed detection device of an elevator in the first embodiment.
5 is an activity diagram of an overspeed monitoring process performed by the elevator car overspeed monitoring device in the first embodiment.
6 is an activity diagram of an overspeed detection process performed by the elevator car overspeed monitoring device in the first embodiment.
7 is an activity diagram of restraint release processing performed by the car overspeed monitoring device of an elevator in the first embodiment.
8 is an example of a hardware configuration diagram of an elevator car overspeed monitoring device in the first embodiment.

Modes for carrying out the present disclosure will be described according to the accompanying drawings. In addition, the same code|symbol is attached|subjected to the same or an equivalent part in each figure. Redundant description of the corresponding part is simplified or omitted appropriately.

Embodiment 1.

1 is a diagram showing an elevator system to which an elevator car overspeed monitoring system according to Embodiment 1 is applied.

In the elevator system of FIG. 1, the hoistway 1 passes through each floor of a building (not shown). A machine room (not shown) is provided right above the hoistway 1 .

The winding machine 2 is provided in the machine room. The hoisting machine (2) has a motor (3), a sheave (4) and a brake (5).

The motor 3 is provided in the machine room. The sheave 4 is mounted on the rotating shaft of the motor 3. A brake 5 is provided near the motor 3 .

The main rope (6) is wound around the sheave (4). The car 7 is suspended from one side of the main rope 6 in the hoistway 1. The balance weight 8 is suspended from the other side of the main rope 6 inside the hoistway 1.

The car overspeed monitoring system 100 includes a plurality of position detectors 31, a switch cam 33, a speed governor 34, and a car overspeed monitoring device 40.

A plurality of position detectors 31 are provided in the hoistway 1 . A plurality of position detectors 31 are arranged so as to exist on the same straight line directed in the vertical direction. For example, the plurality of position detectors 31 are classified into a plurality of upper position detectors 31a and a plurality of lower position detectors 31b.

A plurality of upper position detectors 31a are provided on the upper side with respect to an intermediate position in the vertical direction of the hoistway 1 . A plurality of lower position detectors 31b are provided on the lower side of the hoistway 1 at an intermediate position in the vertical direction.

The position detector 31 includes a detection unit 32 . The detection unit 32 is provided so as to be movable between the initial position and the press position.

The switch cam 33 is provided in the car 7. The switch cam 33 exists at a position where the detection parts 32 of the plurality of position detectors 31 can be pressed.

The speed governor 34 is provided across the machine room and the hoistway 1. The governor 34 includes a governor sheave 34a, a governor rope 34b, and a governor encoder 34c.

The governor sheave 34a is provided in the machine room.

For example, the governor rope 34b is endless. The governor rope 34b is wound around the governor sheave 34a. A part of the governor rope 34b is connected to the car 7.

The governor encoder 34c is mounted on the governor sheave 34a.

For example, an elevator car speed monitoring device 40 is provided in a machine room. The car overspeed monitoring device 40 includes a power source 9c, two safety relays 41 and a processor 50.

The power source 9c is electrically connected to an external power source.

For example, the safety relay 41 is an electronic relay. The two safety relays 41 have the same configuration. The two safety relays 41 are electrically connected to the power source 9c. The safety relay 41 has a main contact 41a.

The main contact 41a is an a contact. The two main contacts 41a are electrically connected in series.

The processor 50 is electrically connected to a plurality of position detectors 31 and a governor encoder 34c. The processor 50 is electrically connected to the control terminals of the two safety relays 41.

For example, the power source 9a is provided in the machine room. The power source 9a is electrically connected to an external commercial power source.

For example, the control panel 20 is provided in a machine room. The control panel 20 includes an inverter 21, a brake control device 22, a power source 9b, a motor relay 24, a brake relay 25, and an operation control device 23.

Inverter 21 is electrically connected to power source 9a via a rectifier. Inverter 21 is electrically connected to motor 3 .

The brake control device 22 is electrically connected to the power source 9a via a rectifier and a DC/DC converter. The brake control device 22 is electrically connected to the brake 5.

The power source 9b is electrically connected to an external power source.

For example, motor relay 24 is an electromagnetic contactor. The motor relay 24 is electrically connected to the power source 9b via two main contacts 41a. The motor relay 24 has a main contact 24a. The main contact 24a is an a contact. The main contact 24a is electrically connected between the power supply 9a and the inverter 21.

For example, the brake relay 25 is an electronic relay. Brake relay 25 is electrically connected to power source 9b via two main contacts 41a. The brake relay 25 has a main contact 25a. The main contact 25a is an a contact. The main contact 25a is electrically connected between the brake 5 and the brake control device 22.

The operation control device 23 is connected to the control terminal of the motor relay 24 and the control terminal of the brake relay 25.

When the processor 50 of the car overspeed monitoring device 40 does not detect the overspeed condition of the car 7, the power source 9c supplies power to the two safety relays 41. When power is supplied to the two safety relays 41, the two main contacts 41a are in a closed state. When the two main contacts 41a are closed, the power source 9b supplies power to the motor relay 24 and the brake relay 25.

When power is supplied to the motor relay 24, the main contact 24a is closed. When the main contact 24a is closed, the power source 9a supplies power to the inverter 21.

When power is supplied to the brake relay 25, the main contact 25a is closed. When the main contact 25a is in the closed state, the brake control device 22 supplies power to the brake 5.

In this state, the operation control device 23 rotates the motor 3 by controlling the inverter 21 . The sheave 4 rotates following the rotation of the motor 3. The main rope 6 follows the rotation of the sheave 4 and moves. The car 7 and the balance weight 8 follow the movement of the main rope 6 and move up and down in opposite directions.

The operation control device 23 stops rotation of the motor 3 by controlling the inverter 21 . The sheave 4 follows the stop of rotation of the motor 3 and stops. The main rope 6 follows the stop of rotation of the sheave 4 and stops its movement. The car 7 and the balance weight 8 follow the stop of the movement of the main rope 6 to stop the elevation.

In this state, the drive control device 23 cuts off the supply of electric power to the brake 5 by controlling the brake control device 22 . The motor 3 is held restrained by the brake 5 .

When the car 7 goes up and down, the governor rope 34b moves along with the car 7 goes up and down. The governor sheave 34a rotates synchronously with the movement of the governor rope 34b. The governor encoder 34c detects the amount of angle through which the governor sheave 34a rotates. The governor encoder 34c outputs a signal according to the amount of the rotation angle of the governor sheave 34a. The amount of the corresponding angle is a quantity representing the movement of the car 7, which is a relationship between the position and speed of the car 7.

The detection unit 32 of the position detector 31 is in the initial position when no external force is applied. When the detection part 32 of the position detector 31 is in the initial position, the position detector 31 outputs a signal by applying a voltage to the circuit. The detection unit 32 of the position detector 31 moves from the initial position to the press position when an external force directed to the press position is applied. When the detection section 32 of the position detector 31 is present at the press position, the position detector 31 does not output a signal.

When the car 7 exists at a position closer than the detection distance prescribed for a certain position detector 31, the switch cam 33 presses the detector 32 of the position detector 31. In this case, the detection part 32 moves from the initial position to the press position. After that, when the car 7 moves to a position farther than the detection distance from the position detector 31, the switch cam 33 is separated from the detector 32 of the position detector 31. In this case, the said detection part 32 moves from a press position to an initial position.

The processor 50 creates speed information of the car 7 based on the signal from the governor sheave 34a.

The processor 50 detects that the signal output from the corresponding position detector 31 has changed from an input state to a non-input state. In this case, the processor 50 detects that the position of the car 7 is the position of the corresponding position detector 31 . The processor 50 creates information on the position of the car 7 .

The processor 50 monitors whether or not the car 7 is in an overspeed state by using information on the position of the car 7 and information on the speed of the car 7 . The overspeed state is a state in which the speed of the car 7 is higher than the reference speed set according to the position of the car 7 .

When the processor 50 detects an overspeed condition of the car 7, it cuts off the supply of power to at least one of the two safety relays 41. When the supply of electric power to the safety relay 41 is cut off, the main contact 41a opens. When the main contact 41a is open, supply of electric power to the motor relay 24 and the brake relay 25 is cut off.

When the supply of electric power to the motor relay 24 is cut off, the main contact 24a is opened. When the main contact 24a is opened, supply of electric power to the motor 3 and the inverter 21 is cut off. When the supply of electric power to the motor 3 is cut off, the motor 3 is stopped.

When the supply of electric power to the brake relay 25 is cut off, the main contact 25a is opened. When the main contact 25a is open, the supply of electric power to the brake 5 is cut off. When the supply of electric power to the brake 5 is cut off, the brake 5 brakes the rotation of the motor 3 .

The car overspeed monitoring device 40 enters a restrained state. In the restraining state, the car overspeed monitoring device 40 continuously cuts off the supply of power to the safety relay 41. In this case, supply of electric power to the motor relay 24 and the brake relay 25 continues to be cut off. The motor 3 does not start. The brake 5 maintains a state of braking the rotation of the motor 3 . The car 7 is in a restrained state. The elevator car 7 continues to be stopped.

In the restraining state, when the operator operates a release pattern to a certain position detector 31, the processor 50 detects the signal of the release pattern input from the position detector 31. For example, the operator presses the detection unit 32 of the position detector 31 by hand in operating the release pattern. For example, the operator changes the position of the detection unit 32 in operating the release pattern.

When the signal of the release pattern is detected, the car overspeed monitoring device 40 releases the restraint state. In this case, the processor 50 causes the two safety relays 41 to be energized. When power is supplied to the two safety relays 41, the two main contacts 41a are closed. When the two main contacts 41a are closed, the motor relay 24 and the brake relay 25 enter a state in which power is supplied. When power is supplied to the motor relay 24, the main contact 24a is closed. When the main contact 24a is closed, the motor 3 and the inverter 21 enter a state in which electric power is supplied. When power is supplied to the brake relay 25, the main contact 25a is closed. When the main contact 25a is closed, the brake 5 is in an energized state. The restrained state of the car 7 is released. The car 7 goes from a restrained state to a normal running state.

Next, the processor 50 will be described using FIG. 2 .

Fig. 2 is a block diagram showing an elevator car overspeed monitoring device according to the first embodiment.

As shown in Figure 2, processor 50 constitutes a dual system. The processor 50 includes a first processor 50a and a second processor 50b.

The first processor 50a and the second processor 50b have the same configuration. The same signal is input from the position detector 31 to the first processor 50a and the second processor 50b. The same signal is input to the first processor 50a and the second processor 50b from the governor encoder 34c. The first processor 50a controls the supply of power to one of the two safety relays 41. The second processor 50b controls the supply of power to the other of the two safety relays 41.

The first processor 50a and the second processor 50b perform the same operation. The first processor 50a monitors whether the second processor 50b is performing the same operation. The second processor 50b monitors whether or not the first processor 50a is performing the same operation.

Next, the configuration of the first processor 50a will be described using FIG. 3 .

3 is a block diagram of an elevator car overspeed monitoring device according to the first embodiment.

As shown in Fig. 3, the first processor 50a includes a storage unit 51, a diagnosis unit 52, a determination unit 53, an overspeed detection unit 54, a restraint release unit 55, and a restraint control unit 56. to provide

The storage unit 51 stores the information of the stop flag. The information of the suppression flag is information indicating that the suppression flag is "valid" or "invalid".

The diagnosis unit 52 creates information on the estimated position of the car 7 inside the hoistway 1 using the signal input from the speed governor encoder 34c. When a signal input from a certain position detector 31 matches the estimated position, the diagnosis unit 52 diagnoses that the position detector 31 is operating normally. When a signal input from a certain position detector 31 does not match the estimated position, the diagnosis unit 52 diagnoses that the position detector 31 is not operating normally.

When the diagnosis unit 52 diagnoses that a certain position detector 31 is operating normally, it stores in the storage unit 51 diagnostic information indicating that the position detector 31 is "normal". When the diagnosis unit 52 diagnoses that a certain position detector 31 is not operating normally, the position detector 31 stores diagnostic information of "abnormal" in the storage unit 51. The diagnostic unit 52 stores a plurality of diagnostic information corresponding to the plurality of position detectors 31 in the storage unit 51 .

The determination unit 53 determines whether or not the diagnosis information of all the position detectors 31 includes information indicating that it is "normal" and the stop flag is "valid".

When the determination unit 53 determines that the diagnostic information of a certain position detector 31 includes information of "abnormal" or determines that the stop flag is "invalid", the overspeed detection unit 54 determines that the plurality of position detectors Using a plurality of signals input from (31) and a signal input from the speed governor encoder 34c, it is detected whether or not the car 7 is in an overspeed state.

When the determination unit 53 determines that the diagnosis information of all the position detectors 31 includes information that is "normal" and the restrain flag is "valid", the restrain release unit 55 transmits the information of the detection position. A release position detector is set among the plurality of position detectors 31 by using. The detection position is the position of the car 7 when an overspeed state is detected. The release position detector is the position detector 31 that accepts an operation of the release pattern.

The restraint release unit 55 receives input of a signal output from the release position detector. The restraint release unit 55 does not accept input of signals output from a plurality of position detectors 31 other than the release position detector. The restraint release unit 55 detects the signal of the release pattern.

When the restraining control unit 56 detects that the restraining flag is "valid", the supply of power to the safety relay 41 is cut off. In this case, the car overspeed monitoring device 40 is in a restrained state. When the restraining control unit 56 detects that the restraining flag is "invalid", power is supplied to the safety relay 41. In this case, the car speed monitoring device 40 is in a state in which the restraining state is released.

Next, an example in which the restraining state of the car speed monitoring device 40 is released will be described with reference to FIG. 4 .

4 is a diagram showing an example of a signal of a release pattern of a signal input to the car overspeed detection device of an elevator in the first embodiment.

In Fig. 4, the state of a signal output from a certain position detector 31, the number of times the position detector 31 has been operated, and the state of the car overspeed monitoring device 40 are shown. In Fig. 4, the horizontal axis is time.

For example, the signal of the release pattern is a signal of a pattern in which the position detector 31 is operated three times. At this time, when the position detector 31 is pressed for 0.5 second or longer, the restraint release unit 55 considers that the position detector 31 has been operated for one time. After that, when the position detector 31 is pressed for 0.5 second or more after 1.0 second or more has elapsed since the position detector 31 was operated, the restraint release unit 55 considers that the position detector 31 has been operated for one time. .

Between time t_1 and time t_2, a certain position detector 31 is pressed by an operator. The time between time t_1 and time t_2 is 0.5 second or longer. Between time t_1 and time t_2, the position detector 31 does not output a signal. At time t_2, the restraint release unit 55 considers that the position detector 31 has been operated for one time. In this case, the restrain release unit 55 detects that the corresponding position detector 31 has been operated once.

The time between time t_2 and time t_3 is 1.0 second or more.

Between time t_3 and time t_4, the position detector 31 is pressed by the operator. The time between time t_3 and time t_4 is less than 0.5 second. In this case, the restraint release unit 55 does not consider that the corresponding position detector 31 has been manipulated.

In the time between time t_4 and time t_5, the position detector 31 is not pressed by the operator.

Between time t_5 and time t_6, a certain position detector 31 is pressed by an operator. The time from time t_5 to time t_6 is 0.5 second or longer. At time t_6, the restraint release unit 55 considers that the position detector 31 has been operated for one time. The restraint release unit 55 detects that the corresponding position detector 31 has been operated twice.

The time from the time t_6 to the time t_7 is 1.0 second or more.

Between time t_7 and time t_8, a certain position detector 31 is pressed by an operator. The time between the time t_7 and the time t_8 is 0.5 second or more. At time t_8, the restraint release unit 55 considers that the position detector 31 has been operated for one time. The restraint release unit 55 detects that the corresponding position detector 31 has been operated three times. In this case, the restraint release unit 55 releases the restraint state to the restraint controller 56 . The car overspeed monitoring device 40 goes from a state of waiting for release of the restraint state to a state in which release of the restraint state has been completed.

Next, the overspeed monitoring process performed by the car overspeed monitoring device 40 will be described with reference to FIG. 5 .

5 is an activity diagram of an overspeed monitoring process performed by the elevator car overspeed monitoring device in the first embodiment. In the activity diagram, an arrow drawn with a broken line indicates a flow in which control is performed. In the activity diagram, an arrow drawn as a solid line represents a flow through which signals or information is exchanged.

As shown in FIG. 5 , the car overspeed monitoring device 40 starts an overspeed monitoring process when the power is turned ON. The car speed monitoring device 40 performs process S001 and processes S002 to S005 in parallel in the speed monitoring process.

Process S001 is a position detector diagnosis process. In process S001, the diagnosis part 52 accepts the input of the some signal output from the some position detector 31, and the signal output from the governor encoder 34c. The diagnosis unit 52 diagnoses whether each of the plurality of position detectors 31 is operating normally, using signals output from the plurality of position detectors 31 and signals output from the governor encoder 34c. . The diagnostic unit 52 stores diagnostic information indicating that the position detector 31 is "normal" or diagnostic information that the position detector 31 is "abnormal" for each of the plurality of position detectors 31. (51) to memorize. After that, the diagnosis unit 52 ends processing S001.

Processing S002 is judgment processing. In process S002, the judgment part 53 acquires from the storage part 51 the several diagnostic information corresponding to the some position detector 31, and the information of a stop flag. The judgment part 53 judges whether the diagnosis information of all the position detectors 31 is "normal", and also whether the stop flag is "valid". When it is judged that the diagnostic information of all the position detectors 31 is "normal" and the restrain flag is "valid", the determination unit 53 determines that the restrain release unit 55 outputs a signal from the position detector 31. Switches from the state of not accepting the input to the state of accepting it. When it is determined that the diagnostic information of a certain position detector 31 includes information of "abnormal" or when it is determined that the restraining flag is "invalid", the determination unit 53 determines that the restraint release unit 55 is at the position It switches from a state of accepting the input of a signal output from the detector 31 to a state of not accepting it. After that, the determination unit 53 ends S002.

In process S002, when it is judged that the diagnostic information of a certain position detector 31 includes information called "abnormality", or when it is determined that the stop flag is "invalid", process S003 is performed. Process S003 is an overspeed detection process. In process S003, the overspeed detection unit 54 receives inputs of a plurality of signals output from the plurality of position detectors 31 and a signal output from the speed governor encoder 34c. The overspeed detection unit 54 detects whether or not the car 7 is in an overspeed state.

In process S003, when it is detected that the car 7 is not in an overspeed state, the overspeed detection unit 54 ends process S003.

In process S003, when it is detected that the car 7 is in an overspeeding state, the overspeed detection unit 54 changes the information of the restriction flag stored in the storage unit 51 to information in which the restriction flag is “valid”. When it is detected that the car 7 is in an overspeed state, the overspeed detection unit 54 stores the information of the detection position in the storage unit 51. After that, the overspeed detection unit 54 ends processing S003.

When process S003 ends, process S004 is performed. Process S004 is a papermaking control process. In process S004, the restraint control unit 56 acquires the information of the restraint flag from the storage unit 51. The restraint control unit 56 detects whether the restraint flag is "valid" or "invalid". When the restraining control unit 56 detects that the restraining flag is "valid", the supply of power to the safety relay 41 is cut off. After that, the restraint control unit 56 ends processing S004. When the restraining control unit 56 detects that the restraining flag is "invalid", power is supplied to the safety relay 41. After that, the restraint control unit 56 ends processing S004.

In process S002, when it is determined that the diagnostic information of all the position detectors 31 includes information of "normal" and the stop flag is determined to be "valid", process S005 is performed. Process S005 is a restraint release process. In process S005, the restraint release unit 55 acquires the information of the detection position from the storage unit 51. The restraint release unit 55 sets a release position detector from among the plurality of position detectors 31 using the information of the detection position.

In process S005, when the signal of the release pattern is input from the release position detector during the set time, the restraint release unit 55 determines the information of the restraint flag stored in the storage unit 51 when the restraint flag is "invalid". change to information After that, the restraint release unit 55 ends processing S005. After that, the process from process S004 is performed.

In process S005, when the signal of the release pattern is not input from the release position detector during the set time period, the restraint release unit 55 ends the process S005.

When processing S001 and processing S005 are completed, the car overspeed monitoring device 40 ends processing S001 and the flow of processing from processing S002 to processing S005. Thereafter, the car overspeed monitoring device 40 performs processing S001 and processing from processing S002 to processing S005 in parallel for each time set as a control cycle.

When the power of the car overspeed monitoring device 40 is turned off, the car overspeed monitoring device 40 ends the overspeed monitoring process.

Next, the overspeed detection process performed by the car overspeed monitoring device 40 will be described with reference to FIG. 6 .

6 is an activity diagram of an overspeed detection process performed by the elevator car overspeed monitoring device in the first embodiment.

As shown in FIG. 6 , in process S101, the overspeed detection unit 54 accepts input of a signal output from the position detector 31 for a set period of time. The overspeed detection unit 54 detects which one of the plurality of position detectors 31 has been pressed. After that, the overspeed detection unit 54 ends processing S101.

In process S101, when it is detected that a certain position detector 31 was pressed, process S102 is performed. In process S102, the overspeed detection unit 54 sets the position of the car 7 to the position of the pressed position detector 31. The overspeed detection unit 54 stores information on the position of the car 7 . After that, the overspeed detection unit 54 ends processing S102.

In process S101, when it is not detected that the position detector 31 was pressed, or when process S102 is complete|finished, process S103 is performed. In process S103, the overspeed detection unit 54 receives an input of a signal output from the governor encoder 34c. The overspeed detection unit 54 calculates the distance the car 7 has moved by using the signal output from the speed governor encoder 34c. The overspeed detection unit 54 sets the position of the car 7, which reflects the distance the car 7 has moved, as the updated position of the car 7. The overspeed detection unit 54 stores information on the location of the car 7 after being updated. After that, the overspeed detection unit 54 ends processing S103.

When process S103 ends, process S104 is performed. In process S104, the overspeed detection unit 54 receives an input of a signal output from the governor encoder 34c. The overspeed detection unit 54 calculates the speed of the car 7 using the signal output from the speed governor encoder 34c. The overspeed detection unit 54 stores speed information of the car 7 . After that, the overspeed detection unit 54 ends processing S104.

When process S104 ends, process S105 is performed. In process S105, the overspeed detection unit 54 calculates the upper limit speed of the car 7 according to the updated position of the car 7 using the information of the car overspeed monitoring pattern. The information of the car overspeed monitoring pattern is information of a function of the upper limit speed of the car 7 relative to the position of the car 7 . Information on the car overspeed monitoring pattern is set in the overspeed detection unit 54 in advance. The overspeed detection unit 54 stores information on the calculated upper limit speed of the car 7 . After that, the overspeed detection unit 54 ends processing S105.

When process S105 ends, process S106 is performed. In process S106, the overspeed detection unit 54 compares the speed of the car 7 stored in process S104 with the upper limit speed of the car 7 stored in process S105. When the speed of the car 7 is higher than the upper limit speed of the car 7, the overspeed detection unit 54 detects that the car 7 is in an overspeed state. After that, the overspeed detection unit 54 ends processing S106.

In process S106, when it is detected that the car 7 is in an overspeed state, process S107 is performed. In process S107, the overspeed detection unit 54 changes the information of the restriction flag stored in the storage unit 51 to information indicating that the restriction flag is "valid". After that, the overspeed detection unit 54 ends processing S107.

When process S107 ends, process S108 is performed. In process S108, the overspeed detection unit 54 sets the detection position to the updated position of the car 7. The overspeed detection unit 54 stores the information of the detection position in the storage unit 51. After that, the overspeed detection unit 54 ends processing S108.

When it is not detected in process S106 that the car 7 is in an overspeed state, or when process S108 ends, the overspeed detection unit 54 ends the overspeed detection process.

Next, with reference to Fig. 7, the restraint release processing performed by the car overspeed monitoring device 40 will be described.

7 is an activity diagram of restraint release processing performed by the car overspeed monitoring device of an elevator in the first embodiment.

As shown in FIG. 7 , in process S201 , the restraint release unit 55 acquires information of the detection position from the storage unit 51 . The restraint release unit 55 sets a release position detector from among the plurality of position detectors 31 based on the information of the detection position. For example, the restraint release unit 55 sets the release position detector to the position detector 31 located at a position farther than the length of the cage 7 in the vertical direction from the detection position. For example, when the detection position is a position above the center of the hoistway 1, the restraint release unit 55 sets the release position detector to the lower position detector 31b. After that, the restraint release unit 55 ends processing S201.

When process S201 ends, process S202 is performed. In process S202, the restraint release part 55 accepts the input of the signal output from the release position detector. The restraint release unit 55 detects whether or not a release pattern signal is input from the release position detector during a set time period. After that, the restraint release unit 55 ends processing S202.

When the signal of the release pattern is input in process S202, process S203 is performed. In process S203, the restraint release unit 55 changes the information of the restraint flag stored in the storage unit 51 to information indicating that the restraint flag is "invalid". After that, the restraint release unit 55 ends processing S203.

When the signal of the release pattern is not input in process S203, or when process S203 ends, the restraint release unit 55 ends the restraint release process.

According to Embodiment 1 described above, the car overspeed monitoring device 40 includes an overspeed detection unit 54, a restraint control unit 56, and a restraint release unit 55. When the state of the signal output from the position detector 31 changes, the restraint release unit 55 causes the restraint control unit 56 to release the restrained state of the car 7 . The position detector 31 functions as an interface for releasing the restrained state of the car 7 . For this reason, there is no need to newly provide the corresponding interface. As a result, it is possible to provide a mechanism for releasing the restrained state of the car 7 without complicating the configuration.

In addition, the car overspeed monitoring device 40 includes a safety relay 41 . When the main contact 41a is open, the safety relay 41 places the car 7 in a restrained state. The restraining controller 56 controls the supply of electric power to the safety relay 41 so that the main contact 41a of the safety relay 41 is opened, so that the car 7 is in a restrained state. The restraint release unit 55 controls the supply of power to the safety relay 41 so that the restraint control unit 56 closes the main contact 41a of the safety relay 41, thereby releasing the restrained state of the car 7. do. For this reason, it is possible to provide a mechanism for releasing the restrained state of the car 7.

In addition, in the car overspeed monitoring device 40, when the overspeed detection unit 54 detects that the car 7 is in an overspeed state, the restraint release unit 55 inputs a signal output from the position detector 31 transitions from a non-accepting state to a receiving state. For this reason, it is possible to prevent a signal from being input to the restraint release unit 55 in a state where the overspeed condition of the car 7 is not detected.

In addition, the car overspeed monitoring device 40 includes a diagnosis unit 52 . When the position detector 31 diagnosed by the diagnosis unit 52 as not operating normally exists, the car overspeed monitoring device 40 does not perform an operation to release the state in which the car 7 is being restrained. don't For this reason, the car overspeed monitoring device 40 can release the restrained state of the car 7 based on a signal from the normally operating position detector 31 . As a result, safety is improved.

In addition, the car overspeed monitoring device 40 releases the restrained state of the car 7 when a signal of a release pattern is input. For this reason, it is possible to suppress the release of restraint of the car 7 by mistake.

In addition, the car speed monitoring device 40 uses a signal output from the speed governor 34 to create information indicating the speed of the car 7 . For this reason, the car overspeed monitoring device 40 can create the speed of the car 7 .

In addition, the car overspeed monitoring device 40 creates information on the detection position of the car 7 when it is detected that it is in an overspeed state. The car overspeed monitoring device 40 sets a release position detector using information on the detection position. The car overspeed monitoring device 40 does not accept an input of a signal output from a position detector 31 other than a release position detector. For this reason, it is possible to suppress the release of restraint of the car 7 by mistake.

In addition, the car overspeed monitoring system 100 includes a plurality of position detectors 31 and a car overspeed monitoring device 40 . For this reason, a mechanism for releasing the restrained state of the car 7 can be provided at low cost.

In addition, the car overspeed monitoring system 100 includes a speed governor 34 . For this reason, the car overspeed monitoring device 40 can calculate the speed of the car 7 .

In addition, the car overspeed monitoring device and car overspeed monitoring system of Embodiment 1 in an elevator in which the hoisting machine 2, the control panel 20, and the speed governor 34 are provided at the top or bottom of the hoistway 1 because there is no machine room ( 100) may be applied. In this case, the car overspeed monitoring device 40 may be provided above or below the hoistway 1 .

Also, the power source 9b may be electrically connected to the DC/DC converter. In this case, power source 9b is supplied with power from a DC/DC converter. Also, the power source 9c may be electrically connected to the DC/DC converter. In this case, power supply 9c is supplied with power from a DC/DC converter.

In addition, the restraint control unit 56 may control the supply of power to the safety relay 41 not based on the information of the safety flag. For example, the overspeed detection unit 54 may transmit, to the restraining control unit 56, restraint information for controlling the safety relay 41 so that the main contact 41a of the safety relay 41 is opened to the restraining control unit 56. . When restraining information is received, the restraining control unit 56 may control the supply of electric power to the safety relay 41 so that the main contact 41a of the safety relay 41 is opened. The restraint release unit 55 may transmit, to the restraint control unit 56, release information for causing the restraint control unit 56 to control the safety relay 41 so that the main contact 41a of the safety relay 41 is closed. The restraining control unit 56 may control the supply of electric power to the safety relay 41 so that the main contact 41a of the safety relay 41 is closed when release information is received.

In addition, the car overspeed monitoring device 40 may be applied to an elevator system not provided with the speed governor 34. In this case, the car overspeed monitoring device 40 may obtain a signal indicating the speed of the car 7 or information indicating the speed of the car 7 from a device other than the speed governor 34 . For example, the car speed monitoring device 40 may acquire a signal indicating the speed of the car 7 or information indicating the speed of the car 7 from the operation control device 23 .

In addition, the car overspeed monitoring device 40 may be replaced with the speed governor 34 as an electronic safety device in the elevator system. In this case, the elevator system to which the car speed monitoring device 40 is applied has a safety function that satisfies the level required by ISO regulations and the like. Specifically, for example, the elevator system concerned satisfies the requirements described in "ISO 8100-1:2019 5.6.2.2.1.6 b". At this time, the position detector 31 is an interface that releases the restraint of the car. The position detector 31 has a high level of safety and reliability required for its interface according to ISO regulations. For example, the position detector 31 includes a mechanism required for the corresponding interface, such as a duplicated mechanism, a self-diagnosis mechanism, and the like. For this reason, when the car overspeed monitoring device 40 is replaced with the speed governor 34, it is not necessary to provide an interface with a high level of safety and reliability for canceling the car restraint. In addition, the worker who releases the restrained state of the car overspeed monitoring device 40 corresponds to a professional worker in ISO regulations.

Next, an example of the first processor 50a will be described using FIG. 8 .

8 is an example of a hardware configuration diagram of an elevator car overspeed monitoring device in the first embodiment.

Each function of the first processor 50a can be realized by a processing circuit. For example, the processing circuit includes at least one processor 200a and at least one memory 200b. For example, the processing circuit includes at least one dedicated piece of hardware 300 .

When the processing circuit includes at least one processor 200a and at least one memory 200b, each function of the first processor 50a is realized by software, firmware, or a combination of software and firmware. At least one of software and firmware is described as a program. At least one of software and firmware is stored in at least one memory 200b. The at least one processor 200a realizes each function of the first processor 50a by reading and executing a program stored in the at least one memory 200b. The at least one processor 200a is also referred to as a central processing unit, a processing unit, an arithmetic unit, a microprocessor, a microcomputer, or a DSP. For example, the at least one memory 200b may include a non-volatile or volatile semiconductor memory such as RAM, ROM, flash memory, EPROM, and EEPROM, a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, a DVD, and the like. am.

When the processing circuit includes at least one dedicated piece of hardware 300, the processing circuit may be, for example, a single circuit, a complex circuit, a programmed processor, a parallel programmed processor, an ASIC, an FPGA, or a combination thereof. is realized with For example, each function of the first processor 50a is realized by a respective processing circuit. For example, each function of the first processor 50a is integrated and realized by a processing circuit.

For each function of the first processor 50a, a part may be realized by the dedicated hardware 300, and the other part may be realized by software or firmware. For example, the function of the overspeed detection unit 54 is realized by a processing circuit as the dedicated hardware 300, and at least one processor 200a operates on at least one memory for functions other than the function of the overspeed detection unit 54. It may be realized by reading out and executing the program stored in (200b).

As such, the processing circuit realizes each function of the first processor 50a by hardware, software, firmware, or a combination thereof.

industrial applicability

As described above, the elevator car overspeed monitoring device and the elevator car overspeed monitoring system according to the present disclosure can be used for an elevator system.

1: hoistway 2: traction machine
3: motor 4: sheave
5: brake 6: main rope
7: elevator car 8: counterweight
9a, 9b, 9c: power supply 20: control panel
21: inverter 22: brake control device
23: operation control device 24: motor relay
24a: main contact 25: brake relay
25a: main contact 31: position detector
31a: upper position detector 31b: lower position detector
32: detection unit 33: switch cam
34: governor 34a: governor sheave
34b: governor rope 34c: governor encoder
40: elevator car overspeed monitoring device 41: safety relay
41a: main contact 50: handler
50a: first processor 50b: second processor
51: storage unit 52: diagnosis unit
53: determination unit 54: speed detection unit
55: restraint release unit 56: restraint control unit
100: Elevator car overspeed monitoring system
200a: processor 200b: memory
300: hardware

Claims (9)

Information indicating the position of the car of the elevator is created using a signal output from a position detector provided in the hoistway of the elevator, and information indicating the position of the car and information indicating the speed of the car are used to an overspeed detection unit that detects an overspeed state in which the speed of the car is higher than a prescribed speed according to the position of the car;
a restraining control unit for placing the car in a restrained state when the overspeed detection unit detects an overspeeding state of the car;
When it is detected that the state of the signal output from the position detector is changed while the car is restrained by the restraining control unit, the restraining control unit is provided with a restraint releasing unit for releasing the restrained state of the car Elevator car overspeed monitoring device. The method of claim 1,
A safety relay for putting the car in a restrained state by cutting off the supply of electric power to the motor and brake of the elevator when the main contact is open;
the restraining control unit controls the safety relay so that the main contact of the safety relay is opened when the overspeed detection unit detects an overspeed state of the car, so that the car is in a restrained state;
When the state of the signal output from the position detector changes while the car is restrained by the restraint controller, the restraint release unit directs the safety relay to close the main contact of the safety relay to the restraint controller. An elevator car overspeed monitoring device of an elevator that releases the restrained state of the car by controlling. According to claim 1 or claim 2,
Car overspeed of an elevator having a determination unit for switching from a state in which the restrain release unit does not accept input of a signal output from the position detector to a state in which the input of the signal output from the position detector is accepted when the overspeed detection unit detects an overspeed state of the car monitor. The method according to any one of claims 1 to 3,
A diagnosis unit for diagnosing whether the position detector is operating normally using a signal output from the position detector and a signal indicating movement of the car;
The restraint releasing unit does not perform an operation to release the restrained state of the car to the restraining control unit when the diagnosis unit diagnoses that the position detector is not operating normally. . The method according to any one of claims 1 to 4,
The restraint release unit, when the signal input from the position detector is a signal of a prescribed release pattern in a state in which the car is restrained by the restraint control unit, causes the restraint control unit to release the restrained state of the car. elevator car speed monitoring device. The method according to any one of claims 1 to 5,
The overspeed detection unit creates information indicating the speed of the car by using a signal output from a speed governor that detects movement of the car of the elevator. The method according to any one of claims 1 to 6,
When the overspeed detection unit detects an overspeed state of the car, using signals output from a plurality of position detectors provided in the hoistway and information indicating the speed of the car, the overspeed state is detected. Create information on the detection position of the elevator car,
The restraint release unit sets a release position detector from among the plurality of position detectors using the information of the detection position created by the overspeed detection unit, and when the release position detector is set, the release position detector is not the release position detector. An elevator car overspeed monitoring device of an elevator that does not accept input of signals output from a plurality of position detectors. A position detector provided in the hoistway of the elevator and outputting a signal according to the position of the car of the elevator;
An elevator car overspeed of an elevator provided with the elevator car overspeed monitoring device according to any one of claims 1 to 7, which creates information indicating the position of the car of the elevator using a signal output from the position detector. surveillance system. The method of claim 8,
A governor provided in the hoistway and outputting a signal according to the speed of the car,
The car overspeed monitoring system of an elevator creates information indicating the speed of the car by using a signal output from the speed governor.

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