JP6630600B2 - Hoist and control method of hoist - Google Patents

Description

  The present invention relates to a hoist and a control method of the hoist.

  As a background art in this technical field, there is JP-A-9-151085 (Patent Document 1). This patent discloses that "a transmitter and an electric hoist main body having a receiving unit for receiving a signal from the transmitter are provided, and the operation of the electric hoist main body is controlled by remote control of the transmitter. In a remote-controlled electric hoist, the transmitter includes a hoist button for hoisting, a lowering button for lowering, a speed-up button for increasing a hoisting speed and a lowering speed, and a hoist. A deceleration button for decreasing the speed and the lowering speed is provided, and the hoisting speed and the lowering speed can be continuously varied by pressing the speed-up button and the deceleration button, respectively. A remote-controlled electric hoist. "

  Also, there is JP-A-4-45100 (Patent Document 2). This publication discloses that “a speed command push button having a plurality of pressing steps, a speed command corresponding to the pressing step of the speed command push button is output, and the change in the speed command value is changed when the pressing step is changed. Speed command output means for controlling the drive source motor to a speed corresponding to the speed command, a speed holding push button for instructing speed holding, and the speed holding push button being pressed. And a command value holding means for holding the speed command value at that time. "

JP-A-9-151085 JP-A-4-45100

  The operating speed of the hoist controlled by the inverter is determined by the frequency output by the inverter. The frequency output by the inverter can be changed by the setting of the inverter. For example, when it is desired to frequently change the operating speed of the hoist, changing the setting of the inverter every time is a complicated operation. Therefore, when it is desired to finely change the operating speed, a multi-stage speed function that changes the frequency output by the inverter based on a specific combination of signals is used, but this multi-stage speed function is limited because the frequency speed that can be selected is finite. You can only change speed to the specified speed.

  In order to solve this problem, conventionally, there is a means for continuously changing the speed of the hoist.

  For example, in Japanese Patent Application Laid-Open No. H11-163, there is provided a speed-up / deceleration button on a remote-controlled transmitter, and the output frequency of the inverter can be continuously varied depending on how long the speed-up button and the deceleration button are operated. It is disclosed that it is possible. Further, the output frequency of the inverter, whose setting has been changed by pressing the speed-up button or the deceleration button, is stored and held, and the next operation is performed at the stored speed.

  Further, Patent Document 2 discloses that when a speed holding button is pressed during acceleration or deceleration operation by inverter control, the inverter output frequency at that time is held and operation can be performed at that speed.

  In the hoist disclosed in Patent Document 1, the inverter output frequency whose setting has been changed is stored and held by pressing the speed-up button or the deceleration button. There is a problem that button operation is required.

  Further, in the speed control device disclosed in Patent Literature 2, since the held inverter output frequency is not stored, it is necessary to operate the speed holding button every time. In addition, since it is necessary to perform the operation during acceleration and deceleration, it is difficult to set the driving speed to the desired one.

  Therefore, the present invention provides a hoist and a control method of the hoist that can save the changed inverter output frequency without pressing the save button each time and can easily return to the initial value.

  In order to solve the above problem, for example, a configuration described in the claims is adopted.

  The present application includes a plurality of means for solving the above-mentioned problems. For example, an input unit for inputting operating conditions relating to one of the operations of hoisting, lowering, traversing, and traveling, and inputting at the input unit A control unit that outputs a control signal based on the set operating conditions, wherein the input unit includes a clear button that outputs a command to delete a set value related to the operating conditions of the hoisting machine. The control unit is characterized in that the set value regarding the operating condition of the hoist input by the input unit is automatically stored in a memory.

  According to the present invention, there is provided a continuously variable transmission control device for a hoist capable of easily returning an inverter output frequency whose setting has been changed to an initial value and easily changing the inverter output frequency. can do.

  Problems, configurations, and effects other than those described above will be apparent from the following description of the embodiments.

It is an example of a perspective view showing the whole composition of an inverter type crane device. It is an example of a block diagram showing composition of a control part of an inverter type crane device. FIG. 3 is an example of a block diagram illustrating a continuously variable transmission control configuration. It is an example of a time chart which shows operation of a general hoist. It is an example of a time chart which shows a stepless speed change operation. It is an example of the flowchart which shows a hoisting frequency increase / decrease process.

  Hereinafter, embodiments will be described with reference to the drawings.

  FIG. 1 is a perspective view showing an entire configuration of an inverter type crane device in which a hoist power supply monitoring device according to the present embodiment is installed, and FIG. 2 is a block diagram showing a configuration of a control unit of the inverter type crane device.

The inverter type crane device includes a crane hook 1, a wire rope 2, a hoisting induction motor 3, a hoisting device 4, a traversing induction motor 5, a traversing device 6, a traversing girder 7, a traveling induction motor 8, and a traveling device 9. , A traveling girder 10, a hoisting / traversing inverter device (referred to as a main control unit) 11, an operation input device 13, and a traveling inverter device 18. The hoisting induction motor 3 has a built-in induction motor brake 16 and an encoder 17, and the traversing induction motor 5 and the traveling induction motor 8 have a built-in induction motor brake 16.
The hoisting / traversing inverter device 11 includes a hoisting / traversing inverter control unit 12, a hoisting inverter 14, and a traversing inverter 15, and the traveling inverter device 18 includes a traveling inverter control unit 19, and a traveling inverter. 20 is built-in.

  The inverter type crane device hoists and lowers the wire rope 2 on the load attached to the crane hook 1 by a hoisting device 4 provided with a hoisting induction motor 3 so that an arrow in the Y direction (Y direction, -Y direction arrow). That is, the load is moved in the vertical direction. In the X direction (indicated by arrows in the X direction and -X direction), the traversing induction motor 5 rotates wheels in the traversing device 6 and moves in the X direction along the traversing girder 7. In the Z direction (indicated by arrows in the Z direction and the −Z direction), the wheels of the traveling device 9 are rotated by the traveling induction motor 8 and moved in the Z direction along the traveling girder 10.

The hoisting and traversing induction motor 3 and the traversing induction motor 5 are controlled by a hoisting and traversing inverter control unit 12 of FIG. That is, when the operator inputs a predetermined instruction from the operation input device 13, the hoisting / traversing inverter control unit 12 controls the hoisting inverter 14 and the traversing inverter 15, and the hoisting inverter 14 and the traversing inverter. From 15, the frequency, voltage and current required for control are applied to the hoisting induction motor 3 and the traversing induction motor 5, and at the same time, the induction motor brake 16 is controlled to be released. The attached luggage is moved in the Y direction without falling. Also,
In the case of the traversing device 6, the hoisting device 4 is moved in the X direction along the traversing girder 7.

  Further, the hoisting / traversing inverter control unit 12 takes in information of the encoder 17 for detecting the number of rotations of the motor, and uses the information of the motor rotation number for controlling the hoisting inverter 14.

  Similarly, when the operator inputs a predetermined instruction from the operation input device 13, the traveling induction motor 8 attached to the traveling device 9 causes the traveling inverter control unit 19 of FIG. 2 stored in the traveling inverter device 18 to travel. The driving inverter 20 is controlled to apply the frequency, voltage and current necessary for the control to the traveling induction motor 8, and at the same time, the induction motor brake 16 is opened and controlled, thereby winding along the traveling girder 10. The upper device 4 is moved in the Z direction.

  FIG. 3 is a block diagram showing a stepless control configuration.

  The hoist according to the present embodiment controls an input device 13 for inputting operating conditions related to any of operations such as hoisting, lowering, traversing, and traveling, and various inverters based on the operating conditions input by the input device 13. And traverse inverter control unit 12 and traveling inverter control unit 19 that output control signals to various inverters, and control each motor based on control signals from hoist and traverse inverter control unit 12 and traveling inverter control unit 19. , A traversing inverter 15, and a traveling inverter 20, and motors 3, 5, 8 that operate based on signals from these inverters. .

  Further, the hoisting / traversing inverter control unit 12 calculates an operation input detection unit 21 for detecting an input from the input device 13 and a frequency increase / decrease value based on the input content from the input device detected by the operation input detection unit 21. A hoisting frequency increasing / decreasing processor 24, a traversing frequency increasing / decreasing processor 26, and a hoisting operation controller 23 and a traversing operation controller 25 for instructing the inverter of a set frequency value after the increase / decrease based on commands from these frequency increasing / decreasing processors. And is provided.

  Similarly, the traveling inverter control unit 19 includes an operation input detection unit 22, a traveling frequency increase / decrease processing unit 28, and a traveling operation control unit 27. The role of each component is that of the hoisting / traversing inverter control unit 12. It is almost the same as each configuration.

The input device 13 includes an on / off, up, down, east, west, south, north, speed up, deceleration, and clear buttons.
The on / off button is a self-holding type, and a signal input by the on / off button is input to each of the hoist / traverse inverter control unit 12 and the traveling inverter control unit 19. The on / off button permits the processing of the hoisting operation control unit 23, the traversing operation control unit 25, and the traveling operation control unit 27 in the on state. In the off state, the inverter operation is forcibly stopped based on the processing results of the hoisting operation control unit 23, the traversing operation control unit 25, and the traveling operation control unit 27.

The up, down, east, and west buttons are each of a two-stage motion type, and signals input by these buttons are input to the hoisting / traversing inverter control unit 12.
The up, down, east, and west buttons select low speed when pressed lightly (first step), and high speed when pressed further (second step). The up button indicates an operation instruction in the Y direction, the down button indicates an operation in the -Y direction, the east button indicates an X direction, and the west button indicates an operation instruction in the -X direction.

Each of the south and north buttons is of a two-stage motion type, and signals input by these buttons are input to the traveling inverter control unit 19.
The south and north buttons select low speed when pressed lightly (first step), and high speed when pressed further (second step). The south button is an operation instruction in the -Z direction shown in FIG. 1, and the north button is an operation instruction in the Z direction. The speed-up, deceleration, and clear buttons are buttons with a contact, and are input to the hoisting / traversing inverter control unit 12 and the traveling inverter control unit 19, respectively.

  When the clear button is pressed, the clear button outputs to the operation input detection unit 21 a command to delete the set value relating to the operating condition of the hoist stored in the memory.

  The memory may be inside or outside the hoist main body, and is automatically stored in the memory when the operating conditions of the hoist are changed.

  The acceleration / deceleration button can increase / decrease the current speed by being pressed. The degree of acceleration or deceleration is determined by the time during which the button is pressed. Thereby, the inverter output frequency can be easily changed. In addition, for the upper, lower, east, west, south, and north buttons that have a two-stage motion system, the speed is increased or decreased only when the speed increase / deceleration buttons are pressed in the state of the first stage. When the vehicle is not driving or in the state of the second stage, the speed cannot be increased or decreased even if the speed increase / deceleration button is pressed.

  The input state of each button from the input device 13 is detected by the operation input detection units 21 and 22. Based on the detection result of the input state, each of the hoisting operation control unit 23, the traversing operation control unit 26, and the traveling operation control unit 28 sends a motor to the hoisting inverter 14, the traversing inverter 15, and the traveling inverter 20. The operation instruction such as the rotation direction and operation frequency of is performed.

  Here, the speed control of the conventional operation without performing the stepless speed change will be described with reference to FIG. FIG. 4 is an example of a time chart showing the operation of a general hoist.

  When the operation button is lightly pressed (first stage) and a low-speed operation instruction is input to the hoist / traverse inverter control unit 12 or the traveling inverter control unit 19 (A), the low-speed output set from the state of zero output frequency In order to control to gradually increase the output frequency based on a predetermined acceleration time up to the frequency, the operation is performed while accelerating. When the output frequency reaches the set low-speed output frequency, the operation is maintained at the low-speed rated speed because the output frequency is maintained.

  Next, when the operation button is further depressed (second stage) and a high-speed operation instruction is input to the hoist / traverse inverter control unit 12 or the traveling inverter control unit 19 (B), the current output frequency is set. In order to perform control to gradually increase the output frequency based on a predetermined acceleration time up to a high-speed output frequency, the operation is performed while accelerating. When the set high-speed output frequency is reached, the output frequency is maintained, so that the operation is performed at the high-speed rated speed.

  Next, when the operation button is returned to the first-stage operation state, only the low-speed operation instruction is input to the hoist / traverse inverter control unit 12 or the traveling inverter control unit 19 (C). In order to control the output frequency to gradually decrease from the current output frequency to a set low-speed output frequency based on a predetermined deceleration time, the operation is performed while decelerating. When the operation button is again set to the second-stage operation state (D), the vehicle is driven while accelerating, as in the case where the second-stage operation is performed.

  Next, when the operation button is released, the driving instruction to the hoisting / traversing inverter control unit 12 or the traveling inverter control unit 19 disappears (E). The hoisting / traversing inverter control unit 12 or the traveling inverter control unit 19 performs operation while decelerating to gradually reduce the output frequency based on a predetermined deceleration time so that the current output frequency becomes zero. When the output frequency becomes zero, the operation stops.

  Here, the purpose of setting the acceleration time and the deceleration time is to protect the electronic components mounted on the inverter when a sudden start and a sudden stop cause an excessive current to be applied to the inverter. The inverter sets an acceleration time and a deceleration time so as to prevent sudden start and sudden stop in order to control the inverter to stop upon detecting an abnormality.

  The speed control of the operation when performing the stepless speed change will be described with reference to FIG. FIG. 5 is an example of a time chart showing the stepless speed change operation.

  When the operation button is lightly pressed (first stage) and a low-speed operation instruction is input to the hoist / traverse inverter control unit 12 or the traveling inverter control unit 19 (F), the hoist / traverse inverter control unit 12 or the traveling inverter control unit The control unit 19 operates while accelerating to perform control to gradually increase the output frequency based on a predetermined acceleration time from a state where the output frequency is zero to a set low output frequency. When the output frequency reaches the set low-speed output frequency, the operation is maintained at the low-speed rated speed because the output frequency is maintained.

  Next, when the speed increase button is pressed (G), the hoisting frequency increase / decrease processing section 24, the traverse frequency increase / decrease processing section 26, and the running frequency increase / decrease processing section 28 of FIG. A command for increasing the operating speed in accordance with the direction in which the vehicle is traveling is output to each of the control units 23, 25, and 27.

  Here, the increase or decrease of the operating frequency is performed, for example, only when there is a low-speed operation instruction, by increasing or decreasing the operating frequency by a constant value at regular time intervals during which the speed-up button or the deceleration button is operated. The constant value for a certain period of time is, for example, increasing or decreasing the operation frequency in 1 Hz units every 0.1 second. The range of the operating frequency that can be increased or decreased is, for example, the lower limit is a low rated speed, and the upper limit is an operating frequency corresponding to a high rated speed. Therefore, when the upper limit is reached according to the range of the operating frequency, even if the speed-up button is kept pressed, the operation of adding the operating frequency is not executed, so that the operation is performed at a constant speed (H).

  Next, when the deceleration button is pressed (I), the hoisting frequency increase / decrease processing unit 24, the traverse frequency increase / decrease processing unit 26, and the running frequency increase / decrease processing unit 28 of FIG. Decrease the operating speed according to the direction in which you are. If the deceleration button is kept depressed and the lower limit value is reached according to the range of the operation frequency, even if the deceleration button is kept depressed, the operation at the constant speed is performed because the operation frequency is not subtracted (J).

  Next, when the speed increase button is pressed again (K) and the speed increase button is released just before reaching the upper limit value of the operation frequency (L), the speed at the release speed is maintained at a constant speed until there is no longer a low speed operation instruction. (M).

  Next, as described above, since the operating frequency is increased or decreased only when the low-speed operation instruction is issued, even if the speed-up button is pressed without the low-speed operation instruction (N), the operation frequency addition processing is performed. Does not execute. Therefore, when a low-speed operation instruction is input again (Q), the operation speed is the same as the previous operation speed (P). Although the above description is for the case of increasing the speed, similarly, in the case of the deceleration instruction, even if the deceleration button is pressed in the absence of the low speed operation instruction, the operation frequency subtraction process is not executed.

  Next, when the operation button is pushed to the second stage and a high-speed operation instruction is input to the hoisting / traversing inverter control unit 12 or the traveling inverter control unit 19 (Q), the increase and decrease of the operation frequency is effective only for the low-speed operation instruction. Therefore, the operating frequency added by the above is not applied, and the hoisting / traversing inverter control unit 12 or the traveling inverter control unit 19 determines in advance from the state of zero output frequency to the set high-speed output frequency. The operation is performed while accelerating in order to control the output frequency to be gradually increased based on the obtained acceleration time. When the set high-speed output frequency is reached, the output frequency is maintained, so that the motor is operated at the high-speed rated speed. Therefore, when it is desired to operate at a high speed, the maximum speed can be easily selected.

  Next, when the clear button is pressed (R), the operation frequency subjected to the acceleration / deceleration is initialized. By initialization, the operation button is lightly pressed (first stage), and when a low-speed operation instruction is input to the hoist / traverse inverter control unit 12 or the traveling inverter control unit 19 (S), the hoist / traverse inverter control unit 12 or the traveling inverter control unit 19 performs acceleration while gradually increasing the output frequency based on a predetermined acceleration time from a state of zero output frequency to a low-speed output frequency of an initial value set. drive. When the low-speed output frequency of the set initial value is reached, the output frequency is maintained, so that the operation is performed at the low-rated speed.

  The processing executed by the hoisting frequency increase / decrease processing unit 24, the traversing frequency increase / decrease processing unit 26, and the running frequency increase / decrease processing unit 28 in FIG. 3 will be described with reference to FIG. FIG. 6 is an example of a flowchart showing the hoist frequency increasing / decreasing process.

  Here, FIG. 6 describes the processing content of the hoisting frequency increase / decrease processing unit 24, but the processing content of the traversing frequency increase / decrease processing unit 26 and the running frequency increase / decrease processing unit 28 can be implemented in the same manner as in FIG. .

  The microcomputer mounted in the hoisting / traversing inverter control unit 12 is set so that the hoisting frequency increasing / decreasing process is executed at a predetermined time, for example, every 10 ms. In the hoisting frequency increasing / decreasing process, first, it is checked whether the input signal is ON (S101). If the input signal is ON, a clear signal is checked next (S102). If the clear signal is OFF, an upper signal or a lower signal as a low-speed operation instruction is confirmed (S103). If either the upper signal or the lower signal is ON, an increase / decrease calculation of the hoisting operation frequency is executed. When the input signal is OFF, the clear signal is ON, or both the upper signal and the lower signal correspond to any of the conditions of OFF, the increase / decrease calculation of the hoisting operation frequency is not executed (S111, S112, S113).

  If the clear signal is ON, the low-speed operation frequency is initialized (S112).

  Next, in the increase / decrease calculation of the hoisting operation frequency, first, the speed increase signal is confirmed (S104). If the speed increase signal is ON, the count of the operation time of the deceleration button is cleared (S105), and the deceleration signal is confirmed (S106). If the deceleration signal is ON, the count of the operation time of the speed-up button is cleared (S114), and the process ends. This is because if both the speed-up button and the deceleration button are pressed, an increase or decrease in the hoisting operation frequency is not performed as an abnormal state.

  If the deceleration signal is OFF, the operation time count for increasing the speed is incremented by 1 (S107), and it is confirmed whether the count value is, for example, 10 or more (S108). If the count value is less than 10, the process ends. Here, since the hoisting frequency increasing / decreasing process is executed every 10 ms, the count value being less than 10 indicates a speed-up operation of less than 90 ms. If the count value is 10 or more, it is checked whether the low-speed operation frequency setting value is, for example, less than 60 Hz (S109). This is performed to confirm the upper limit value so as not to exceed the speed shift range when the frequency to be increased is added to the low operation frequency. If the low-speed operation frequency set value is less than 60 Hz, the low-speed operation frequency is set to, for example, +1 Hz, the operation time count of the speed-up button is cleared, and the process ends (S110).

  If the low-speed operation frequency set value is 60 Hz or more, the addition will exceed the upper limit value if added, so that the low-speed operation frequency is not changed, only the operation time count of the speed-up button is cleared, and the process ends (S114). ).

  Next, in the process for decelerating, first, an acceleration signal is checked (S104).

  If the speed-up signal is OFF, the count of the operation time of the speed-up button is cleared (S115), and the deceleration signal is confirmed (S116). If the deceleration signal is OFF, the count of the operation time of the speed-up button is cleared (S121), and the process ends. This is because, similarly to the speed-up process, if both the speed-up button and the deceleration button are pressed, an increase or decrease in the hoisting operation frequency is not performed as an abnormal state. If the deceleration signal is ON, the deceleration operation time count is incremented by 1 (S117), and it is confirmed whether the count value is, for example, 10 or more (S118). If the count value is less than 10, the process ends.

  Here, since the hoisting frequency increasing / decreasing process is executed every 10 ms, a count value of less than 10 indicates a deceleration operation of less than 90 ms. If the count value is 10 or more, it is checked whether the low-speed operation frequency setting value exceeds, for example, 6 Hz (S119). This is performed to check the lower limit value so that the speed does not fall below the speed shift range when the deceleration frequency is subtracted from the low-speed operation frequency. If the low-speed operation frequency setting value exceeds 6 Hz, the low-speed operation frequency is decreased by, for example, -1 Hz, the operation time count of the deceleration button is cleared, and the process is terminated (S120).

  If the low-speed operation frequency setting value is 6 Hz or less, the value will be lower than the lower limit value if subtracted. Therefore, the low-speed operation frequency is not changed, only the deceleration button operation time count is cleared, and the process is terminated (S121). .

  Here, the upper and lower limit values of the 60 Hz and 6 Hz, the value of 10 for judging the operation time count of the acceleration and the operation time count of the deceleration, and the addition and subtraction of the low-speed operation frequency of +1 Hz and −1 Hz The value may be freely changed by setting of the hoist / traverse inverter control unit 12.

  Alternatively, the increased or decreased operating frequency may be visually confirmed by outputting the value of the increasing or decreasing frequency or the value currently output from the inverter to an external device and connecting to a display device.

  According to the present embodiment, the set operating frequency is automatically stored in the memory so that the increased / decreased operating frequency is not initialized even when the power is cut off, so that the set operating frequency is stored. It is not necessary to press the save button every time. Further, since the stored increased / decreased operating frequency is easily initialized by pressing the clear button, there is an effect that it is not necessary to perform a complicated procedure for the initialization. In addition, the output frequency of the inverter can be easily changed according to the time during which the speed-up and speed-down buttons are pressed. Furthermore, since the operation frequency is increased / decreased with the increase / decrease button only for the low-speed operation frequency, the maximum speed can be easily selected even if the operation frequency is changed to any value by giving a high-speed operation instruction. In addition, it is possible to easily set the increase / decrease value of the driving frequency in accordance with the driving feeling of the user.

1: crane hook 2: wire rope 3: hoisting induction motor 4: hoisting device 5: traversing induction motor 6: traversing device 7: traversing girder 8: traveling induction motor 9: traveling device 10: traveling girder 11: hoisting / traversing inverter device 12: hoisting / traversing inverter control unit 13: operation input device 14: hoisting inverter 15: traverse inverter 16: induction motor brake 17: encoder 18: traveling inverter device 19: Traveling inverter control unit 20: Traveling inverter 21: Hoisting / traversing operation input detecting unit 22: Traveling operation input detecting unit 23: Hoisting operation control unit 24: Hoisting frequency increase / decrease processing unit 25: Traversing operation control unit 26 : Traveling frequency increase / decrease processing unit 27: Traveling operation control unit 28: Traveling frequency increase / decrease processing unit

Claims (12)

An input unit for inputting operating conditions relating to any of the operation of hoisting winding down, traversing, traveling,
A memory for storing a set value related to the operating condition;
A control unit that outputs a control signal based on the operating condition input at the input unit,
A hoist comprising:
The input unit includes a clear button that outputs a command to delete a set value related to the operating condition stored in the memory ,
Wherein, hoist, characterized in that automatically stores the settings for the operating conditions of the winding-up mechanism that is input by the input unit to the memory. The hoist according to claim 1, wherein
The hoisting machine according to claim 1, wherein the input unit includes an increase / decrease button whose operation speed is determined by a pressing time. The hoist according to claim 2, wherein
A hoisting machine characterized in that the range of operating frequency that can be increased or decreased by the increase / decrease button is predetermined. The hoist according to claim 1, wherein
The input unit includes a button for controlling any of winding up, winding down, and traversing,
The hoisting machine, wherein the button is a two-stage button. The hoist according to claim 4, wherein
A hoisting machine wherein the operating speed when the button is pressed to the first stage is lower than the operating speed when the button is pressed to the second stage. The hoist according to claim 4, wherein
The input unit includes an increase / decrease button whose operation speed is determined by a pressing time,
A hoisting machine wherein the operating speed can be changed by pressing the increase / decrease button in a state where the button is pressed down to a first stage. An input step of inputting operating conditions relating to any of the operations of hoisting winding down, traversing, traveling,
A control step of outputting a control signal based on the operating conditions input in the input step,
A control method of a hoist comprising:
The input step includes a clear button pressing step of outputting a command to delete a set value related to the operating conditions of the hoist,
The control method according to claim 1, wherein the control step automatically stores, in a memory, a set value relating to an operation condition of the hoist, which is input in the input step. It is a control method of the hoist of Claim 7, Comprising:
The input method includes a step of pressing an increase / decrease button whose operating speed is determined by a pressing time. It is a control method of the hoist of Claim 8, Comprising:
In the inputting step, a range of the operating frequency that can be increased or decreased by the increase / decrease button is predetermined. It is a control method of the hoist of Claim 7, Comprising:
The input step, hoisting, lowering, comprises a lower hoisting horizontal button pressing step of pressing a button for controlling any of the horizontal,
A method for controlling a hoist, wherein the button is a two-stage button. It is a control method of the hoist of Claim 10, Comprising:
The control method for a hoist according to claim 1, wherein an operation speed when the button is pressed to the first stage is lower than an operation speed when the button is pressed to the second stage. It is a control method of the hoist of Claim 10, Comprising:
The input step includes an increase / decrease button pressing step in which the operating speed is determined by the pressing time,
In the input step, the operating speed can be changed by pressing the increase / decrease button in a state where the button is pressed to the first stage.

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