KR100920161B1 - Stage setting lifter having function for preventing malfunction and interrupting operation when accident occurs and preventing malfunction and interrupting operation method using the lifter - Google Patents

Abstract

PURPOSE: A driving apparatus for the stage setting and a malfunction blocking method using the same are provided, which enable to prevent accident through prior action. CONSTITUTION: A driving apparatus for the stage setting comprises a drum(5), a speed reducer(8), a drive motor(6), a driving apparatus, an encoder(10), a motor brake(7), and circuit breakers(20,30). The drum releases or winds the wire rope connected to a rod for hanging the stage set. The speed reducer is connected to the rotation axis of the drum. The drive motor stops or rotates the drum by being connected to the reducer. The driving apparatus is installed in the drive motor. The encoder is installed in the drum and senses rotation number, rotation speed, and rotational direction of the drum. To the motor brake and drive motor, the circuit breaker is connected.

Description

Stage setting lifter having function for preventing malfunction and method for preventing malfunction using same {Stage setting lifter having function for preventing malfunction and interrupting operation when accident occurs and preventing malfunction and interrupting operation method using the lifter}

According to the present invention, when the driving device malfunctions due to a failure of a driving motor or a brake failure of a driving device for a stage device, an abnormal signal is detected from the driving device to automatically shut off the operation of the driving device and inform the driver to take an abnormal action. The present invention relates to a driving device for a stage device having a malfunction blocking function, and a malfunction blocking method using the same.

As shown in FIG. 1, a general stage apparatus includes a device rod 1 capable of hanging a stage set, a wire rope 2 connected to the device rod 1, and an upper portion of the device rod 1. Fixed iron grid (3) and the vertical pulley (4) and the like installed on the grid iron (3) to change the direction of the wire rope (2), as a driving device for driving such a stage device, A drum (5) for moving the rod (1) up and down by winding or unwinding the wire rope (2), and a driving motor (6) connected to the rotating shaft of the drum (5) to rotate the drum (5); In addition, there is a motor brake (not shown) which mechanically blocks driving of the reduction gear 8 and the driving motor 6 connected to the driving motor. Therefore, when the operator finds an abnormal operation of the driving device, it is possible to quickly operate the motor brake to block the fall of the device rod 1 and the sets.

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However, the conventional stage drive device has to operate the motor brake manually when the operator detects an abnormal operation, so there is a great inconvenience in using the device rod continuously, and the drive motor is used for a long time. If there is an abnormality caused by overload and the operator does not know this and the power is supplied to the drive motor, the motor brake is open and the drive motor cannot be driven. There is a risk of occurrence.

On the other hand, some of the recent driving devices are equipped with an inverter to the drive motor to the inverter adjusts the number of revolutions of the drive motor and the motor brake adopts a method to automatically perform the brake operation in response to the signal from the inverter. In other words, the motor brake is automatically operated when an abnormal signal is input from the inverter while driving the driving motor.

However, this method also has a problem in that a fall accident occurs because the brake signal is not transmitted to the motor brake side when an abnormality that does not generate an abnormal signal occurs due to an abnormal operation of the abnormal signal contact point of the inverter or a fault of the inverter itself. .

In addition, the conventional driving apparatuses commonly have a problem that they cannot prevent a fall accident that occurs when an abnormality occurs in the motor brake itself.

According to the present invention, when an abnormality of the driving motor or the motor brake itself or an inverter installed in the driving motor generates an abnormality without generating an abnormal signal, the present invention is automatically controlled to cut off the power of the driving motor and operate the motor brake. It is an object of the present invention to provide a driving device for a stage device having a malfunction blocking function for preventing an accident through precautions by immediately notifying the outside of a problem and a malfunction blocking method using the same.

In order to achieve the above object, the present invention is a drum for winding or unwinding the wire rope connected to the device rod for hanging the stage set, a reducer connected to the rotating shaft of the drum, connected to the reducer to rotate the drum or In a driving device for a stage device having a driving motor for stopping and a motor brake installed on the driving motor, each circuit breaker detects a malfunction of the driving device based on an operation signal of the encoder and detects a malfunction of the driving motor. An operation signal is output to stop the motor brake and to operate the motor brake. When the encoder outputs the operation signal even during the operation of the motor brake, the fall detection unit outputs an operation signal to each circuit breaker by determining that the motor brake is abnormal. It is characterized in that the operation is controlled.

In addition, the drive motor is further provided with an inverter for adjusting the rotational speed of the drive motor, the fall monitoring unit monitors the command rotational speed of the inverter and the rotational speed of the drum of the encoder while the command rotational speed of the inverter and the rotation of the drum If the number differs by more than the allowable limit, an operation signal may be output to each circuit breaker to stop the driving motor and operate the motor brake.

In addition, the fall monitoring unit detects an operation signal of an encoder in which the rotational speed of the drum is out of the range of the normal rotational speed previously input, or an operation signal of the encoder in which the rotational speed of the drum is out of the normal rotational speed. If detected, output an operation signal to each circuit breaker.

In addition, the present invention is installed on a drum for winding or unwinding the wire rope connected to the device rod for hanging the stage set, the encoder for detecting the rotational speed, the rotational speed, the rotational direction of the drum, a drive motor for driving the drum and Method for breaking a malfunction using a driving device for a stage device having a malfunction breaking function having a motor brake, a circuit breaker connected to the motor brake and a driving motor, and a fall detector for outputting an operation signal to the circuit breaker when a malfunction is detected. The method of claim 1, further comprising: a first step of inputting a speed limit or rotation speed related data of a drum into the fall monitoring unit; A second step of monitoring the rotational speed, rotational speed, and rotational direction of the drum in real time through the encoder when the driving device is operated to rise or fall; Whether the fall monitoring unit matches the direction of operation of the drum (up or down) of the drive device, whether the number of revolutions of the drum is normal or the speed of the drum is normal, or when the motor brake is operated Determining whether to output an operation signal; And in the third step, the rotational direction of the drum does not coincide with the operation direction (rising or falling) of the drive device, the rotational speed of the drum is not the normal rotation speed, or the rotational speed of the drum is not the normal rotational speed, or the operation of the motor brake. In the case that the encoder outputs an operation signal even at the time, the fall monitoring unit outputs an operation signal to each circuit breaker to cut off the power of the driving motor and the motor brake stops the driving motor. do.

According to the present invention configured as described above, the fall monitoring unit monitors the abnormality of the driving motor and the motor brake through an encoder installed in the drum, and detects an abnormality in the rotational speed, the rotational speed, the rotational direction of the drum or when the motor brake is operated. Even when the encoder outputs an operation signal or compares the rotational speed of the drum with the inverter's commanded speed, and the difference is over the allowable limit, the automatic control is made to stop the drive motor and operate the motor brake. Therefore, it is possible to prevent the malfunction of the driving device or the fall of the device rods and sets caused by not detecting the abnormality caused by the damage of the drive motor or the motor brake itself or the inverter itself as in the prior art.

The features and advantages of the present invention will become more apparent from the following detailed description of preferred embodiments based on the accompanying drawings. Prior to this, the terms or words used in the present specification and claims are defined in the technical spirit of the present invention on the basis of the principle that the inventor can appropriately define the concept of the term in order to explain his invention in the best way. It must be interpreted to mean meanings and concepts.

The present invention is a drum for winding or unwinding the wire rope connected to the device rod to hang the stage set, a drive motor connected to the rotating shaft of the drum to rotate or stop the drum, and a reducer and a motor installed in the drive motor Applied to driving devices for stage equipment with brakes.

As shown in FIG. 2, the present invention has wiring breakers 20 and 30 connected to the motor brake 7 and the driving motor 6, respectively. These circuit breakers 20 and 30 are electronic breakers, commonly referred to as MCCBs (Molded Case Circuit Breakers), and are respectively installed between the motor brake 7 and the power supply line and between the driving motor 6 and the power supply line. In accordance with the input signal of the motor brake (7) or the drive motor (6) to the power supply or cut off.

The drum 5 is installed on the output shaft of the reducer 8, and the drum 5 is provided with an encoder 10 for detecting the rotation speed, the rotation speed, and the rotation direction of the drum 5. The encoder 10 is the fall monitoring unit 40 is connected. The fall monitoring unit 40 is connected to the circuit breakers 20 and 30 to detect a malfunction of a driving device based on an operation signal of the encoder 10, When a malfunction is detected, an operation signal is output to each of the circuit breakers 20 and 30 to stop the driving motor 6 and operate the motor brake 7.

The fall monitoring unit 40 performs an operation in which the drum 5 is out of a range of a normal rotation speed or a normal rotation speed previously input based on an operation signal of the encoder 10, or the rotation direction of the drum is When the encoder outputs an operation signal even when the operation direction is opposite to the operation direction or when the motor brake is operated, the circuit breaker for each wiring is configured to stop the driving motor 6 and to operate the motor brake 7 by determining that the driving device is malfunctioning. The operation signal is output to (20, 30).

This is because if the drum 5 rotates in the opposite direction or performs an operation outside the range of the normal rotational speed or the normal rotational speed previously input, the abnormality of the driving motor 6 or the encoder 10 is expected, and the motor brake 7 This is because when the encoder 10 outputs an operation signal even during the operation of the motor), the motor brake 7 may be abnormal.

Here, the range of the normal rotational speed previously input to the fall monitoring unit 40 follows the allowable maximum rotational speed and the minimum rotational speed of the drum 5, and the range of the normal rotational speed is the allowable maximum rotational speed of the drum 5. And allowable minimum speed.

On the other hand, as shown in Figure 3, the drive motor 6 may be further provided with an inverter 70 for adjusting the rotational speed of the drive motor 6, in this case, the fall monitoring unit 40 is an inverter Also connected to 70. The fall monitoring unit 40 monitors the command rotation speed and the rotation speed of the drum 5 of the encoder 10 in real time. In addition, the inverter 70 is connected with a circuit breaker 30 for cutting off the power of the inverter 70.

The fall monitoring unit 40 determines that the inverter 70 and the rotational speed of the drum 5 is greater than the allowable limit, and determines that the inverter 70 is abnormal to the circuit breakers 20 and 30. By outputting an operation signal, the driving motor 6 is stopped and the motor brake 7 is operated. That is, when the fall monitoring unit 40 outputs an operation signal to the circuit breaker 30 of the inverter 70, the operation of the inverter 70 is stopped and thus the driving motor 6 is stopped. The stopped inverter 70 is later restarted by the operator.

On the other hand, the fall monitoring unit 40 converts the rotational speed of the encoder 10 to the moving distance of the device rod 1 and transmits it to the wired / wireless terminal using a wired / wireless network to transmit the abnormal signal in real time It further includes a control circuit for outputting. Therefore, the operator can grasp the abnormal state of the driving device in real time and take appropriate action even in a remote place from the stage device.

In this case, the control circuit outputs an alarm or flashing signal to the wired / wireless terminal 60 of the worker or when the device rod 1 is out of the limit height, it is also easy for the worker to grasp the abnormality by hearing or naked eyes. It is possible. In addition, the control circuit may immediately send an SMS to the operator's mobile phone to notify of the abnormality of the driving device.

On the other hand, Figures 6a to 6c shows a state diagram of use of the malfunction blocking device of the driving device for the stage device according to the present invention in various ways, respectively.

Referring to the process of blocking the malfunction by using the drive device for the stage device having a malfunction blocking function according to the present embodiment configured as described above are as follows.

First, as shown in FIG. 4, the fall monitoring unit 40 includes a maximum allowable rotational speed and an allowable minimum rotational speed and an allowable maximum rotational speed and an allowable minimum rotational speed of the drum 5 on which the motor brake 7 is to be operated. When the speed limit or the speed related data such as the limit speed is input in advance, and the operator raises or lowers the driving device, the motor brake 7 is opened and the driving motor 6 and the drum 5 are raised or lowered. Direction (S1).

At the same time, the fall monitoring unit 40 monitors the rotational speed, rotational speed, and rotational direction of the drum 5 in real time through the encoder 10. (S2)

And the fall monitoring unit 40 is whether the rotation direction of the drum (5) coincides with the operation direction (up or down) of the drive device or the rotation speed of the drum (5) or the rotation speed of the drum (5) It is determined whether is the normal rotational speed and whether the encoder 10 outputs an operation signal even when the motor brake 7 operates (S3).

According to the present invention, as shown in the fall monitoring unit, the rotational direction of the drum 5 coincides with the operation direction (rising or falling) of the driving device or whether the rotational speed of the drum 5 is the normal rotational speed, and the motor brake. In operation (7), the encoder 10 may determine whether to output an operation signal in sequence.

As a result, the rotational direction of the drum 5 does not coincide with the operating direction (rising or descending) of the drive device, or the rotational speed of the drum 5 is not the normal rotational speed, or the rotational speed of the drum 5 is not the normal rotational speed. When the encoder 10 outputs an operation signal even when the motor brake 7 is operated, the fall detector 40 outputs an operation signal to each of the circuit breakers 20 and 30 (S4) to drive the motor. Cut off the power of 6) and cause the motor brake 7 to stop the drive motor 6.

That is, when the fall monitoring unit 40 determines that the rotational direction of the drum 5 is not an up (or down) direction, the device rod 1 is lowered (or is abnormally operated by the damage of the drive motor 6 itself). The operation signal is output to each circuit breaker 20, 30, and the power of the drive motor 6 is cut off so that the drive motor 6 is stopped and the motor brake 7 operates. While the drive motor 6 is stopped.

When the fall monitoring unit 40 determines that the rotational speed of the drum 5 exceeds the normal rotational speed (allowable maximum rotational speed), the device rod 1 is abnormally operated by the self-damage of the driving motor 6. It considers that it is rising (or falling) more than necessary, and outputs an operation signal to each circuit breaker 20 and 30. Accordingly, the power of the driving motor 6 is cut off and the driving motor 6 is stopped. The driving motor 6 is stopped while the brake 7 operates.

When the fall monitoring unit 40 determines that the rotational speed of the drum 5 exceeds the normal rotational speed (maximum allowable rotational speed), the fall monitoring unit 40 operates abnormally due to damage to the driving motor 6 or disconnection of the wire rope. The device rod 1 is regarded as falling and outputs an operation signal to each circuit breaker 20 and 30. Accordingly, the power of the drive motor 6 is cut off and the drive motor 6 is stopped. The driving motor 6 is stopped while the brake 7 operates.

In addition, when the fall monitoring unit 40 determines that the encoder 10 outputs an operation signal even when the motor brake 7 is operating, the motor brake 7 assumes that the motor brake 7 is in abnormal operation due to its own damage. An operation signal is output to the wiring breakers 20 and 30. Accordingly, the driving motor 6 is stopped while the power of the driving motor 6 is cut off, and the control circuit of the fall monitoring unit 40 warns the worker in real time of such an abnormal state of the driving device, thereby prompting the operator to appropriately. It allows you to take action.

As such, the fall monitoring unit 40 automatically detects an abnormality of the driving motor 6 or the motor brake 7 through the encoder 10 and automatically controls the operation of the driving motor 6 and the motor brake 7. Therefore, it is possible to prevent the malfunction of the driving device or the fall of the device rod (1) and the set in advance.

On the other hand, as shown in Figure 5, when the drive motor 6 is further provided with an inverter 70, the fall monitoring unit 40, the maximum allowable rotational speed and the minimum allowable rotational speed and allowance of the drum (5) Restriction speed or limit rotation speed related data such as maximum rotation speed and allowable minimum rotation speed are input in advance to calculate the allowable maximum drive motor rotation speed at which the motor brake 7 should be operated. The allowable rotation speed difference is input between the number and the command rotation speed of the inverter 70. (S10)

When the operator raises or lowers the driving device, the motor brake 7 is opened and the driving motor 6 and the drum 5 rotate in the up or down direction. At this time, the fall monitoring unit 40 monitors the rotational speed or rotational speed, the rotational direction, the command rotational speed of the inverter 70 through the encoder 10 in real time.

In addition, the fall monitoring unit 40 is the rotation direction of the drum 5 coincides with the operation direction (up or down) of the drive device, whether the rotation speed of the drum 5 is the normal rotation speed, the rotation of the drum 5 Whether the speed is a normal rotation speed, whether the encoder 10 outputs an operation signal even when the motor brake 7 is operating, or the difference between the rotation speed of the drum 5 and the command rotation speed of the inverter 70 is within the allowable limit. Determine the recognition (S12)

As a result, the rotational direction of the drum 5 does not coincide with the operating direction (rising or descending) of the drive device, the rotational speed of the drum 5 is not the normal rotational speed, or the rotational speed of the drum 5 is not the normal rotational speed. Or when the encoder 10 outputs an operation signal even when the motor brake 7 operates, or the difference between the rotational speed of the drum 5 and the commanded rotational speed of the inverter 70 is outside the allowable limit, the fall monitoring unit 40 outputs an operation signal to each of the circuit breakers 20 and 30 (S13) to cut off the power supply of the drive motor 6 and to operate the motor brake 7 to completely stop the drive motor 6.

That is, when the rotational speed of the drum 5 and the commanded rotational speed of the inverter 70 show more than the allowable limit, the fall monitoring unit 40 considers that the inverter 70 has an abnormal operation due to its own damage. An operation signal is output to each of the circuit breakers 20 and 30 to stop the driving motor 6 and to operate the motor brake 7. Accordingly, as the power of the inverter 70 and the driving motor 6 is cut off, the driving motor 6 is stopped and the motor brake 7 is operated to completely stop the driving motor 6. The inverter 70, which has been stopped in operation, is reset by the operator and then restarted.

As described above, even when an abnormality of the inverter 70 itself is generated as well as an operation abnormality caused by the damage of the driving motor 6, the fall monitoring unit 40 is the inverter 70 even when the abnormal signal itself is not output from the inverter 70. By detecting abnormality of the self, it automatically controls the operation of the drive motor 6 and the motor brake 7 so that it can prevent the malfunction of the driving device or the fall of the device rod 1 and the set. do.

On the other hand, the control circuit of the fall monitoring unit 40 displays the height of the rod 1 in real time to the wired / wireless terminal 60 of the operator when the motor brake 7 is opened to start the up or down operation, As described above, when the fall monitoring unit 40 detects an abnormality and outputs an operation signal to the circuit breakers 20 and 30, the fall signal is received from the fall monitoring unit 40 and the user's wire / wireless terminal 60 is abnormal. By outputting a signal, the operator is immediately aware of an abnormality in the drive system and promptly takes appropriate action.

As described above, preferred embodiments of the present invention are described above with reference to the drawings, but the present invention is not limited to the above-described embodiments, and those skilled in the art to which the present invention pertains can make modifications without departing from the spirit of the present invention. Possible, such modifications will fall within the scope of the invention.

1 is a view showing a drive device for a conventional stage device.

Figure 2 is a schematic view showing the configuration of a drive device for a stage apparatus having a malfunction blocking function according to an embodiment of the present invention.

Figure 3 is a schematic view showing the configuration of a drive device for a stage apparatus having a malfunction blocking function according to another embodiment of the present invention.

Figure 4 is a flow chart showing a malfunction blocking method using a drive device for a stage device having a malfunction blocking function according to an embodiment of the present invention.

5 is a flowchart illustrating a malfunction blocking method using a driving device for a stage apparatus having a malfunction blocking function according to another embodiment of the present invention.

Figure 6a to 6c is a front view, a side view and a state of use of the driving device for the stage device having a malfunction blocking function according to the present invention, respectively.

<Explanation of symbols for the main parts of the drawings>

1 ... 2 rods ... wire rope

3 ... grid iron 4 ... vertical pulley

5.Drum 6 ... Driving Motor

7.Motor brake 8 ... Reduction gear

10 Encoder 20, 30 ...

40.Crash monitoring unit 60 ... wired / wireless terminals

70.Inverter

Claims (5)

A drum for winding or unwinding a wire rope connected to a device rod for hanging a stage set, a reducer connected to a rotating shaft of the drum, a drive motor connected to the reducer to rotate or stop the drum, and the drive motor. In the drive device for a stage apparatus having an installed motor brake, The drum is provided with an encoder for detecting the rotational speed, rotational speed, rotational direction of the drum, Wiring breakers are connected to the motor brake and the driving motor, respectively. Each circuit breaker detects a malfunction of the driving device based on the operation signal of the encoder, and if a malfunction is detected, outputs an operation signal to stop the driving motor and operate the motor brake, but the encoder operates even when the motor brake is operated. The driving device for a stage device having a malfunction blocking function, characterized in that the operation is controlled by a fall monitoring unit for outputting an operation signal to each circuit breaker in the event of outputting a signal. The method of claim 1, The drive motor is further provided with an inverter for adjusting the rotational speed of the drive motor, The fall monitoring unit monitors the command rotational speed of the inverter and the drum rotational speed of the encoder, and if the command rotational speed of the inverter and the rotational speed of the drum differ by more than the allowable limit, stops the driving motor and operates the motor brake. A driving device for a stage device having a malfunction blocking function, characterized by outputting an operation signal to each circuit breaker. The method according to claim 1 or 2, The fall monitoring unit has a malfunction blocking function for outputting an operation signal to each circuit breaker when an operation signal of an encoder outside the range of a normal rotation speed or a normal rotation speed is input in advance. Drive device for the device. delete An encoder that is installed on a drum that winds or unwinds a wire rope connected to a device rod for hanging a stage set, an encoder for detecting the rotation speed, rotation speed, and rotation direction of the drum, a driving motor for driving the drum, a motor brake, In the malfunction blocking method using a drive device for a stage device having a malfunction interruption function having a circuit breaker connected to the motor brake and the driving motor, respectively, and a fall detector for outputting an operation signal to the circuit breaker when a malfunction is detected, A first step of inputting a speed limit or rotation speed related data of a drum to the fall monitoring unit; A second step of monitoring the rotational speed, rotational speed, and rotational direction of the drum in real time through the encoder when the driving device is operated to rise or fall; Whether the fall monitoring unit matches the direction of operation of the drum (up or down) of the drive device, whether the number of revolutions of the drum is normal or the speed of the drum is normal, or when the motor brake is operated Determining whether to output an operation signal; And In the third step, when the rotation direction of the drum does not match the operation direction (rising or falling) of the drive device, the rotation speed of the drum is not the normal rotation speed, or the rotation speed of the drum is not the normal rotation speed, or when the motor brake is operated. Also, when the encoder outputs an operation signal, the fall monitoring unit outputs an operation signal to each circuit breaker to cut off the power of the driving motor, and the motor brake stops the driving motor. Malfunction blocking method using a driving device for a stage device having a malfunction blocking function.

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