KR100583901B1 - Turbo driving method and device of paper shredder - Google Patents

Abstract

The present invention relates to a turbo driving method and apparatus for a three-stage machine, and in order to cut a document in the turbo driving mode by temporarily increasing the torque of the motor when the motor is detected an overload during the sedan in the normal driving mode.

To this end, the present invention comprises a first step of detecting a drive current flowing in the motor in the sedan operation state by detecting the abolition, and stopping the motor to temporarily stop the aborting sedan operation when an overload is detected; A second step of checking whether the user selects the turbo operation or the reverse rotation operation by checking an external key input in the pause state; When the turbo operation mode selection is confirmed in the second step, the turbo driving method of the three-stage machine comprising a third step of high-speed cutting the paper jammed in the waste paper inlet in the existing sedan progress direction by rotating the motor forward in the turbo operation and its A device is provided so that documents that are cut off due to overload in the normal operation mode can also be switched to the turbo operation mode so that the paper jammed in the waste paper inlet can be completely shredded.

Document Shredder, Turbo Operation, Overload Detection, Start-Drive Single Phase Induction Motor, Torque Rise, Relay

Description

Turbo driving method and device for document shredders {TURBO DRIVING METHOD AND DEVICE OF PAPER SHREDDER}

1 is a block diagram of a document shredder driving apparatus according to the prior art.

2 is a block diagram of a turbo driving device for a document shredder according to an embodiment of the present invention.

3 is an example of a motor driving apparatus including a turbo driving means for realizing a turbo driving mode according to the present invention.

4 is a characteristic curve diagram of a condenser start-operation type single-phase induction motor applied to a turbo drive device of the present invention.

5A and 5B are flowcharts illustrating operations of a turbo driving method of a sedan according to an embodiment of the present invention.

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

11: power supply unit 12: waste paper input detection unit

13 motor drive unit 13a: starting capacitor

13b, 13c: driving capacitor 13d: relay

14: motor unit 15: overload detection unit

16: alarm display unit 17: main control unit

18: door detection unit 19: waste box detection unit

20: switch input unit

The present invention relates to a document shredder having a turbo function, and more particularly, by applying a turbo driving function for temporarily changing the torque of a motor to operate the sewer, so that the sewer can be operated in the normal operation mode and the turbo operation mode in parallel. The present invention relates to a turbo driving method and apparatus for one of the sedans to be used more conveniently.

In general, a conventional shredder, as shown in Figure 1, the power supply unit (1) for supplying the operating power and motor drive power of each part of the shredder, and the paper detection unit (2) for generating a detection signal by checking whether the waste paper is inserted And a motor driver 3 for outputting a motor control signal for paper shredding according to the detection signal of the paper detector, a motor unit 4 driven by the motor driving power of the power source unit and the motor control signal, and A motor overheat prevention part 5 for outputting a control signal for stopping the motor after a predetermined time after the detection signal generated by the paper detection part is generated, the operation state of the paper detection part and the motor driving part and the inside of the waste box And an alarm display unit 6 for detecting an accumulation state of the abolished state and a main control unit 7 for controlling each part of the system.

In the conventional shredder having such a configuration, when paper input is sensed by the paper detector 2, the motor driver 3 drives the motor 4 so that the paper (slip or document) input to the paper detector 2 is received. In this case, the motor overheat prevention unit 5 controls the output of the motor driving unit 3 after a predetermined time elapses from the time of driving the motor to stop the motor to prevent the motor from overheating. .

However, in the case of such a conventional shredder, when an error occurs in the motor overheat prevention part when paper is stuck in the paper detector 2 and the motor continues to be driven, there is no way to control the motor. Driven continuously, the power loss is increased, the motor is worn out, the problem is shortened life.

In addition, in the case of a conventional sedan equipped with a motor capable of forward / reverse rotation, when an overload is detected during the sedan, the motor can be stopped or reversed, and the user can reload the paper by reducing the number of sedans. However, this may cause problems such as some sedans are scattered on the upper body, and in the case of a large gap between the inlet and the sedan blade, if an overload is detected near the end of the sedan of the sedan, You will not be able to remove the document, and you will not get a sedan.

In addition, when such a paper shredder is installed in an unmanned operation, serious problems such as overheating of the motor may cause an abnormality in the system and eventually cause a fire.

Therefore, the present invention has been made to solve the above problems, the present invention is to operate the turbo function when the motor is detected during the sedan in the normal operation mode by temporarily increasing the torque of the motor, the document is stopped sedan document It is possible to use the sedan more conveniently by making it possible to completely seperate and also to operate the turbo operation function by the torque conversion of the motor as described above by arbitrarily selecting according to the user's intention. It is an object of the present invention to provide a turbo driving method and apparatus for a three-stage machine, which enables the selective operation in a mode and a turbo driving mode to conveniently use the three-stage machine.

One embodiment of the apparatus of the present invention for achieving the above object, in the driving device of a three-stage machine equipped with a forward / reverse rotation motor, the normal operation mode, the turbo operation mode, and the forward / reverse of the motor in each operation mode A switch input unit having a plurality of switches for manipulating rotation and stop operations; Controls each part of the sedan system, and checks the switch selection state of the switch input unit to control the operation mode control signal for controlling normal / turbo operation, and to control the forward / reverse rotation and stop operation of the motor in each operation mode. Main control unit for generating a motor control signal for; Turbo driving of the sedan comprising a motor driving unit for controlling the operation of the motor in the turbo / normal operation mode according to the operation mode control signal of the main control unit, and the motor driving unit for forward / reverse rotation or stop according to the motor control signal of the main control unit. Provide the device.

 In one embodiment of the apparatus of the present invention, the motor driving unit comprises: a starting capacitor and a plurality of driving capacitors connected to the motor for starting and driving the motor; It may be preferable to include a turbo driving means composed of a relay for changing the torque of the motor required for turbo operation or normal operation in accordance with the operation mode control signal of the main controller, and is connected to the motor by the switching operation of the relay It may be configured to temporarily increase the torque of the motor by changing the capacity of the operating capacitor.

One embodiment of the method of the present invention for achieving the above object is, in the driving method of a three-stage device having a forward / reverse rotation motor, the overload is detected by detecting the drive current flowing in the motor in the sedan operation state by the detection of abolition A first step of stopping the motor to temporarily stop the aborting sedan operation; A second step of checking whether the user selects the turbo operation or the reverse rotation operation by checking an external key input in the pause state; When the turbo operation mode selection is confirmed in the second step, the turbo driving method of the three-stage machine comprising a third step of high-speed cutting the paper jammed in the waste paper inlet in the existing cutting direction by rotating the motor forward in turbo operation. to provide.

In an embodiment of the present invention, in the third step, when the turbo operation mode selection is confirmed in the second step, the first step of determining whether the turbo operation is possible by checking the reactivation constraint condition of the turbo operation is performed. In addition, other embodiments may be configured to be selectively performed only when the turbo operation is confirmed to be possible.

According to another embodiment of the present invention, if the reverse rotation operation selection is confirmed in the second step, by rotating the motor in the normal operation mode to remove the paper stuck in the waste paper inlet in the reverse direction by the normal operation fourth Implementation may also be possible with a configuration that performs the steps.

In each embodiment of the method of the present invention, the third step may further comprise resetting a condition for limiting the restarting of the turbo operation after the turbo operation is normally executed. In this case, as a condition for limiting the restart of the turbo operation, it may be possible to set the time required for normal turbo operation to be performed again after the turbo operation as a limit condition. For this purpose, a timer for setting the turbo operation restart timeout period may be set. It would be desirable to use.

Further, in each embodiment of the method of the present invention, it may be preferable to use the method of temporarily increasing the torque of the motor by changing the capacity of the driving capacitor connected to the motor in the turbo driving step.

The objects, features and advantages of the present invention will be more readily understood by reference to the accompanying drawings and the following detailed description.

Hereinafter, the configuration and operation of the preferred embodiment of the present invention with reference to the accompanying drawings in detail as follows.

FIG. 2 is a block diagram of a turbo drive device of a sewage machine according to an embodiment of the present invention. Abolition input detection unit 12 for detecting the input waste paper, the motor unit 14 operated by the motor driving power and the motor control signal of the power supply unit, and an overload to detect whether the current flowing through the motor to detect the overload A detector 15, a door detector 18 for detecting whether the waste paper inlet is opened, a waste box detector 19 for detecting an accumulated state of waste paper in the waste box, the waste paper input detector, Alarm display unit 16 for generating an alarm according to the motor operation state and the result of detecting the accumulated waste state inside the waste box, and the normal / reverse rotation and stop operation of the motor in the normal operation mode, turbo operation mode, and each operation mode. For manipulating A switch input unit 20 including a switch and a control signal for driving or stopping the motor by outputting the waste paper input, to prevent overheating of the motor, to control each part of the sedan system, and to control each switch of the switch input unit. Main control unit 17 for generating the operation mode control signal for controlling the normal / turbo operation by checking the selection state, and the motor control signal for controlling the forward / reverse rotation and stop operation of the motor in each operation mode, and the motor. It is provided with a turbo driving means for the turbo operation of the operation mode control signal of the main control unit by switching the operation mode to control the operation of the motor in the turbo / normal operation mode, and the motor in accordance with the motor control signal of the main control unit And a motor drive unit 13 for forward / reverse rotation or stop.

Figure 3 is an embodiment of the turbo drive means for realizing the turbo driving function in the three-stage according to the present invention illustrates a turbo driving means constructed using a condenser start-operation single-phase induction motor, Figure 4 is a A characteristic curve diagram of a condenser start-operation type single-phase induction motor illustrates the relationship between the rotational speed and the torque of the motor.

That is, as shown in Figs. 3 and 4, the three-stage according to the present invention at the first start, the operation is started by increasing the starting torque by using the starting capacitor and the operating capacitor, and once the start is passed through a constant speed The starting capacitor is constructed by applying a motor driving device that is disconnected and is operated only by a driving capacitor. In such a motor driving device, a starting capacitor 13a and a plurality of driving capacitors 13b and 13c for starting and driving the motor are configured. )Wow; The relay contact is switched in accordance with the operation mode control signal of the main controller 17 to provide a turbo driving means including a relay 13d for varying the number of starting capacitors 13a and driving capacitors 13b and 13c in the motor. In addition, it is configured to selectively execute the turbo operation or the normal operation in accordance with the switching operation of the relay. As a result, the relay 13d can be used as a means for changing the torque of the motor required for turbo operation or general operation, and by changing the connection contact point between the motor and the condenser to change the capacity of the driving capacitor connected to the motor. By zooming in, the torque of the motor can be temporarily increased.

For reference, when the condenser start-operation single phase induction motor is loaded with the motor under no load operation, the characteristics of the motor move along the torque-speed curve so that the speed decreases as the load increases, but the torque increases. After that, when the load increases further and passes the maximum point, the speed and torque decrease rapidly and the motor stops running. In a shredder using a motor with this characteristic, the machine remains in the speed range slightly lower than the synchronous speed due to the friction and weight of the drive before inserting the document or the paper, and then gradually decreases the speed and increases the torque. As the number of document inputs increases, the speed moves closer to the maximum point of the operating capacitor characteristic curve. When the maximum number of sheets is exceeded, the speed decreases and stops. In addition, if the current is continuously applied even when the motor is stopped, the load is applied to the motor and the life is shortened. Therefore, in the three-stage machine, the load on the motor is measured by using a current sensor and the overload is sensed to stop the motor operation. You can protect it.

On the other hand, in general, two methods can be used to temporarily increase the torque of the motor temporarily in a state in which a winding or a rotor of the motor is determined, and a method of increasing the voltage supplied to the motor and changing the capacity of the capacitor. There is this. According to the former method, to increase the voltage supplied to the motor, a separate transformer must be installed. Motors used in medium-sized shredders are generally 1/2 [HP]. It is usually about 20 [A]. This method is undesirable because the size and weight of a 20 [A] transformer is too large and expensive. Therefore, in the present invention, the latter method is used, that is, a method of temporarily changing the capacitor capacity is applied, and when the overload occurs during the sedan, the capacity of the operating capacitor among the two capacitors is temporarily increased to raise the motor characteristic curve as a whole. By moving in the direction, torque is temporarily raised in all areas during startup or operation.

5A and 5B are flowcharts illustrating an example of a turbo driving method of a sedan according to the present invention. The driving method according to the present invention includes an initial starting step (S100-S111) and a sedan operation performed at the same time as the power is turned on. A first step (S113-S131) for temporarily stopping the aborting sedan operation when an overload is detected in the state; and a second step (S133, S155) for checking whether the user selects the turbo operation or the reverse rotation operation in the pause state. S161 and the third step (S131-S145) of fast-cutting the paper by rotating the motor forward in the turbo operation mode according to the operation mode selected in the second step (S131-S145) or by rotating the motor in the normal operation mode to reverse the paper. It comprises a fourth step (S151-S159) to remove the reverse echo.

The initial startup step may include a step of initializing each sensor and a part of the system at the same time the power is turned on (S100), and a step of starting the sedan system as a whole (S111).

The first step is to check the waste bin to output an alarm when the waste bin is full (S113, S115), and check the door open state to output an alarm when the door is open (S117, S119) And, if the waste paper input is detected by detecting whether the waste paper input is detected step of rotating the motor forward in the normal operation mode until the waste paper input is no longer detected (S121-S125) and the motor during the sedan operation Detecting an overload by detecting a driving current flowing through the device or checking whether the stop key is input, and stopping the motor by stopping the motor when the overload is detected or the stop key is input (S127-S131). .

The second step is a step of checking the external key input in the motor pause state by the overload detection, and checking whether the user selects one of the turbo operation, the reverse rotation operation or the reset key (S133, S155, S161). ) May be included.

The third step is carried out when the turbo operation mode selection is confirmed in the second step (Y branch of S133), the high-speed forward rotation of the motor by turbo operation to the paper cut in the waste paper inlet in the existing sedan proceeding direction high-speed sedan Step (S137), and whether or not the detection of the abolition during the high-speed sedan operation or whether the one-time operation time set for safe turbo operation is checked to stop the motor at the waste paper inlet no longer detected or the specified time has elapsed And stopping the high speed cutting operation (S139-S143).

In particular, the third step may further include a step (S135) of first determining whether a turbo operation is possible by checking a restart operation restriction condition of the turbo operation before performing the high speed cutting operation by the turbo operation. In this case, the turbo operation is selectively performed only when it is confirmed that the turbo operation is possible, and in the state in which the turbo operation is not possible, for example, the operation to be in the standby state or to display an alarm indicating the state (S136). Can be configured. Here, the turbo operation restart limit conditions may be, for example, conditions that can prevent the sedan system from overheating due to excessive turbo operation, that is, limitation conditions necessary for normal turbo operation again after turbo operation. Could be. In the present invention, a case in which the time for which the turbo operation can be restarted, that is, a time condition is used, is described as an example, and the time count (up) It can be implemented using a timer for / down).

In addition, the third step may further include resetting a condition for limiting re-operation of the turbo operation after the high speed cutting operation by the turbo operation is performed (S145).

The fourth step is performed when the reverse rotation operation selection is confirmed in the second step (Y branch of S151), and the existing sedan proceeds to remove the paper stuck in the waste paper inlet by rotating the motor in the normal operation mode. Reversing in the opposite direction of the direction (S153), and during the reverse rotation operation, the waste paper is not detected at the waste paper inlet any more or stop key is input, the waste paper is no longer detected at the waste paper inlet or stop key is In operation S155 to S159, the motor may be stopped to stop the waste paper removal operation.

Referring to the operation of the present invention and the resulting effects according to the configuration as described above are as follows.

First, as shown in FIGS. 5A and 5B, when the power is turned on, each sensor and each part of the system are initialized (S110), and then the sedan system is started as a whole (S111). Through checking the cumulative state of the waste paper inside the waste bin and the door opening state of the waste paper inlet opening (S113, S117), and according to the result of the check indicating that the waste paper is full or the door of the waste paper inlet opening is opened. Alarms are displayed (S115, S119).

Next, when the waste paper is detected from the waste paper input detection sensor (S121) and the waste paper input is detected (Y branch of S121), as shown in FIG. 3, one operation capacitor 13b and the starting capacitor 13a are respectively shown. Is connected to the motor, that is, the motor is rotated forward in the normal operation mode, and the waste paper is cut into three stages (S125). During the three-stage operation, the drive current flowing through the motor is detected to determine whether the motor is overloaded (S127). If an overload is detected (Y branch of S127) the second step (S133, S151, S161) to immediately wait for a key input by the user to solve the overload condition after stopping the motor by temporarily stopping the motor (S131). Proceed to

In the normal operation state (N branch of S127) where the motor is not overloaded, when the abolition input is detected from the sensor (Y branch of S121), the user does not forcibly input the stop key from the outside (N of S129). Branch) Continue. If the stop key is input by the user (Y branch of S129), the second step (S133, S151, S161) to immediately stop the motor (S131) to pause the sedan operation and wait for the next key input by the user. Proceed to). If the input of the waste paper is no longer detected (N branch of S121), it is recognized that there is no longer waste paper to be sewn and the motor is stopped (S123) after a predetermined time has elapsed from that point of time (Y branch of S122). This completes the sedan movement.

Next, in the second step, it is checked whether the user selects one of the turbo operation, the reverse rotation operation, or the reset key (S133, S155, S161), and the operation path is changed to the third, fourth, or initialization step according to the key input, respectively. Diverge.

If the turbo operation mode selection is confirmed in the second step (Y branch of S133), the turbo operation restart limit timer is monitored (S135) to first determine whether the turbo operation is possible, and the turbo operation is confirmed to be possible. Only in the case (Y branch of S135), the motor is selectively rotated to the turbo operation mode (S137). In this case, the switching operation to the turbo operation mode may mean a switching operation of the relay 13d by the main controller 17 of FIG. 3, and the two operation capacitors 13b and 13c By allowing the starting capacitor 13a to be connected to the motor, the motor can be forward rotated in the existing sedan direction (S137) to perform turbo operation. Therefore, by fast cutting the paper jammed in the waste paper inlet in the existing sedan traveling direction, You can sedan by increasing the number of sedans temporarily. As a result of the determination, if the condition that can prevent the sedan system from being overheated by excessive turbo operation, that is, if the turbo operation restart limit timer is still in operation, it is recognized that the turbo operation is impossible (N branch of S135). In step S136, the superheated system is kept in a standby state until the turbo operation is restored to a state where it can be restored or an alarm indicating the state is displayed.

Meanwhile, the turbo operation may be continuously performed until the waste paper is detected at the waste paper inlet or until the turbo operation time elapses. In other words, by detecting whether the waste paper is inserted in the turbo operation state (S139) and at the same time checking whether the one-time turbo operation time set for stable turbo operation is checked (S141), if the waste paper is not detected at the waste paper inlet (S139). N branch of the motor) When the turbo operation time elapses (Y branch of S141), the operation of the motor is stopped (S143) to end the high speed cutting operation. Subsequently, the timer for limiting the re-operation of the turbo operation is reset again (S145) so that the turbo operation can be normally executed again, thereby limiting the time interval between the previous turbo operation and the next turbo operation. .

On the other hand, if the reverse rotation selection is confirmed in the second step (Y branch of S151), the motor is rotated in the normal operation mode (S153) to operate in the direction opposite to the existing sedan direction paper stuck in the waste paper inlet Remove in reverse direction. This reverse rotation operation is continuously executed in the state where waste paper is detected at the waste paper inlet (Y branch of S155) or when no stop key is input (N branch of S157), and waste paper is not detected (N branch of S155) or stop key. Is input (Y branch of S157), the motor operation is indicated and the abolition removal operation in the reverse direction is stopped.

According to the three-stage machine applying the turbo operation function as described above, the motor can be driven by temporarily increasing the capacity of the driving capacitor in the turbo operation mode. You can do it.

According to the present invention, by allowing the document to be cut in the turbo operation mode in which the motor is rotated at high speed while the torque of the motor is temporarily raised, it is possible to completely cut the document which has been stopped in the normal operation mode. If necessary, the operation mode of the sedan can be selected as the normal operation mode and the turbo operation mode to operate the sedan conveniently.

Claims (8)

In the driving device of a three-stage machine equipped with a forward / reverse rotation motor, A switch input unit including a general operation mode and a turbo operation mode, and a plurality of switches for manipulating forward / reverse rotation and stop operations of the motor in each operation mode; A motor driving unit including a starting capacitor and a plurality of driving capacitors connected to the motor for starting and driving the motor, and a relay for switching a connection contact between the motor and each capacitor; And When the normal operation mode is selected by the switch input unit, the starting capacitor and at least one driving capacitor are connected to the motor at the first startup, and the connection of the starting capacitor is opened after a predetermined speed after starting the turbo. And a main control unit controlling the motor driving unit to increase the torque of the motor by varying the number of the starting capacitor and the plurality of driving capacitors connected to the motor when the operation mode is selected. The method of claim 1, The main control unit is a turbo drive device of the document shredder, characterized in that the forward / reverse rotation or stop the motor in each operation mode according to the selection of the forward / reverse rotation or stop operation of the motor through the switch input unit. delete In the driving method of a shredder provided with a forward / reverse rotation motor, Detecting a driving current flowing through the motor in the segregation operation state by the abolition detection and stopping the abolition sedan operation if an overload is detected; Checking an external key input state in the pause state to determine whether an operation mode selected by a user is a turbo operation mode or a reverse rotation operation mode; When the turbo operation mode selection is confirmed by the operation mode determination step, the number of starting capacitors and a plurality of driving capacitors connected to the motor is varied to rotate forward by turbo operation in which the torque of the motor is increased. When the high speed is cut in the direction of sedan progression and the reverse rotation mode is selected, the start capacitor and at least one drive capacitor are connected to the motor at the first start, and the connection of the start capacitor is opened after a certain speed after the start. And rotating the motor back to the normal operation mode to remove the paper jammed in the waste paper inlet in the reverse direction by the normal mode. The method of claim 4, wherein the operation mode determination step, If the selection of the turbo operation mode is confirmed, further comprising the step of first determining whether the turbo operation is possible by checking the reconditioning constraints of the turbo operation, so that it is selectively processed only when it is confirmed that the turbo operation is possible. Turbo drive method of document shredder. delete The method of claim 5, And after the turbo operation mode is executed, starting a timer for limiting a restart time of the turbo operation mode. delete

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