WO2018123104A1 - Position setting device for hoisting machine - Google Patents

Abstract

An input device which issues control instructions comprises: an operation instruction means for operating a hoisting machine; an upward drive instruction means for providing instructions for switching between low-speed upward drive and high-speed upward drive; and a downward drive instruction means for providing instructions for switching between low-speed downward drive and high-speed downward drive. At least one position for a crane hook is set from an upper limit stopping point position, lower limit stopping point position, upward speed changing point position, and downward speed changing point position by putting the operation instruction means into an inoperative state and switching to a position setting mode by controlling the upward drive instruction means and the downward drive instruction means.

Description

Hoisting machine position setting device

The present invention relates to a position setting device for a hoisting machine.

Normally, an inverter type hoist has an electronic upper / lower limit stop function and a vertical shift point function. The upper / lower limit stop function is a function for prohibiting operation beyond the set position by the user setting an arbitrary position. This upper / lower limit stop function makes it possible to prevent the lifted luggage from colliding with a building structure or the like by making settings according to the installation environment.

Also, the vertical shift point function is a function that prohibits high-speed operation when the user exceeds the set position by setting an arbitrary position. With this vertical shift point function, it is possible to alleviate the impact when landing the load and inform the operator that the upper and lower limit positions are close.

In the upper / lower limit stop function and the vertical shift point function, any position can be set. In this case, in order to set an arbitrary position, it is necessary to operate a board mounted on the control panel. However, the control panel is usually installed on the ceiling of the building where the hoisting machine is located. For this reason, in order to set an arbitrary position, it is necessary for the operator to go to the ceiling of the building.

Therefore, Patent Document 1 describes a position setting device for a hoisting machine that can set an arbitrary position without an operator going to the building ceiling. Specifically, in Patent Document 1, by turning on the emergency stop button of the push button switch at hand of the operator, the operation mode is changed to the setting mode, and the setting is performed by operating the upper operation button or the lower operation button. The position is canceled or set.

JP 2010-148243 A (Patent No. 523479)

However, in Patent Document 1, when the emergency stop button is turned ON, the supply of power to the control board and the common line of other operation buttons are cut off. Therefore, even if the emergency stop button is turned on, a control configuration is required so that the power supply to the control board and the common line of other operation buttons are not blocked. In general, in consideration of safety, even if the emergency stop button is turned off, the supply of power to the control board and the common line of other operation buttons are cut off.

Therefore, in Patent Document 1, unless a control configuration is adopted in which the power supply to the control board and the common line of other operation buttons are not cut off, the upper and lower limit stop positions are used by using a switch at the operator's hand. Alternatively, it is difficult to set the vertical shift point position to an arbitrary position.

The object of the present invention is to set the upper / lower limit stop position or the vertical shift point position to an arbitrary position by using an input device at hand of the operator without adopting a complicated control configuration. An object of the present invention is to provide a position setting device for a hoisting machine.

One aspect of the present invention is a position setting device for a hoisting machine for setting the position of a crane hook of the hoisting machine, the control unit for controlling the position of the crane hook, and an operation instruction An input device, and the input device instructs operation control means for setting the control unit in an operation-permitted state or an operation-non-permitted state, and switching between the upper direction low speed operation and the upper direction high speed operation of the crane hook. An upward operation instructing means, and a downward operation instructing means for instructing switching between the downward low-speed operation and the downward high-speed operation of the crane hook, and the control unit causes the operation instruction means to be in the operation non-permitted state. By shifting to the position setting mode according to the operation instruction from the upward operation instruction means or the downward operation instruction means, the upper limit stop point position and the lower limit stop point of the crane hook Location, and setting at least one position of the upward shift point position and downward shift point position.

According to the present invention, the upper / lower limit stop position or the vertical shift point position can be set to an arbitrary position using the input device at hand of the operator without employing a complicated control configuration. .

It is a block diagram which shows the control structure of the position setting apparatus of the winding machine which concerns on embodiment of this invention. It is a perspective view which shows the whole structure of an inverter type crane apparatus. It is a block diagram which shows the structure of the control part of an inverter type crane apparatus. It is a figure for demonstrating operation | movement of an upper / lower limit stop function. It is a figure for demonstrating operation | movement of an up-down direction shifting point function. It is a flowchart which shows a position setting process.

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

First, the configuration of the inverter type crane apparatus will be described with reference to FIGS. As shown in FIGS. 2 and 3, the inverter type crane apparatus includes a crane hook 1, a wire rope 2, a hoisting induction motor (motor) 3, a hoisting apparatus 4, a traverse induction motor (motor) 5, and a traversing apparatus. 6, traverse girder 7, travel induction motor (motor) 8, travel device 9, travel girder 10, hoisting / traverse inverter device (hereinafter referred to as main control unit) 11, input device 13, travel inverter device 18. The hoisting induction motor 3 includes an induction motor brake 16 and an encoder 17, and the traverse induction motor 5 and the traveling induction motor 8 include an induction motor brake 16.

The hoisting / row traversing inverter device 11 includes a hoisting / row traversing inverter control unit 12, a hoisting inverter 14, and a traversing inverter 15. The traveling inverter device 18 includes a traveling inverter control unit 19 and a traveling inverter 20. The winding inverter 14, the traversing inverter 15, and the traveling inverter 20 are each connected to a three-phase power source 30. The hoisting / traversing inverter control unit 12 and the traveling inverter control unit 19 are connected to the input device 13.

The inverter type crane apparatus is configured such that a load attached to the crane hook 1 is wound and unwound by a hoisting device 4 equipped with a hoisting induction motor 3 to wind and unwind the wire rope 2 in the Y direction (Y direction, -Y direction). That is, it moves up and down. Further, in the X direction (indicated by arrows in the X direction and the −X direction), the traverse induction motor 5 rotates a wheel in the traversing device 6 and moves in the X direction along the traverse girder 7. Further, in the Z direction (indicated by arrows in the Z direction and the −Z direction), the traveling induction motor 8 rotates the wheel in the traveling device 9 and moves in the Z direction along the traveling girder 10.

The hoisting and traverse induction motors 3 and the traverse induction motor 5 are controlled by the hoisting / traverse inverter control unit 12 shown in FIG. That is, when an operator (operator) inputs a predetermined instruction from the input device 13, the hoisting / traverse inverter control unit 12 controls the hoisting inverter 14 and the traverse inverter 15. Then, the frequency, voltage, and current necessary for control are applied to the hoisting induction motor 3 and the traverse induction motor 5 from the hoisting inverter 14 and the traverse inverter 15, and at the same time, the induction motor brake 16 is controlled to be released. Thereby, in the case of the hoisting device 4, the load attached to the crane hook 1 moves in the Y direction without falling. On the other hand, in the case of the traversing device 6, the hoisting device 4 moves in the X direction along the traversing girder 7.

Also, the hoisting / traverse inverter control unit 12 takes in the information of the encoder 17 that detects the rotation speed of the motor 3 to determine the position of the crane hook 1 and uses it for operation control. Similarly, when the operator inputs a predetermined instruction from the input device 13, the travel induction motor 8 attached to the travel device 9 has a travel inverter control unit 19 shown in FIG. 2 stored in the travel inverter device 18. The traveling inverter 20 is controlled. Then, the frequency, voltage, and current necessary for control are applied from the traveling inverter 20 to the traveling induction motor (motor) 8 and at the same time, the induction motor brake 16 is controlled to open along the traveling girder 10. The device 4 is moved in the Z direction.

Here, with reference to FIG. 1, the control configuration of the position setting device of the hoist according to the embodiment will be described. The input device 13 for the operator to operate is an input button 21 (operation instruction means) for operating the hoisting device 4 (winding machine), and an instruction to switch between the upward low speed operation and the upward high speed operation. And an upper button 22 (upward driving instruction means) and a lower button 23 (downward operation instructing means) for instructing switching between the lower speed low speed driving and the lower speed high speed driving. By turning the ON button 21 (operation instruction means) OFF (operation non-permission state), the upper button 22 (upward operation instruction means) or the lower button 23 (downward operation instruction means) is operated to enter the position setting mode. Transition. Then, the upper limit stop point position, the lower limit stop point position, the upward shift point position, or the downward shift point position of the crane hook 1 is set in a state where the on button 21 (operation instruction means) is turned off (operation non-permitted state). .

As shown in FIG. 1, there is an on button 21 on the common line of the input device 13, and when the on button 21 is turned on (operation permitted state), the operation buttons such as the upper button 22 and the lower button 23 are energized. It has become. In addition, the main power switch 24 is energized by turning on the on button 21. As a result, when the contact of the main power switch 24 is turned on, power is supplied to the winding inverter 14 and the like. Further, when the on button 21 is turned on, the hoisting / traversing inverter control unit 12 determines that it is in the on state and enters the operation permission state.

In addition, the upper button 22 and the lower button 23 have, for example, a two-stage push button structure, and a low speed operation instruction is issued at the first stage, and further, a second stage signal is output by pushing further, and a high speed operation instruction is issued. Is output. Specifically, when the upper button 22 is pressed in the first stage, an upward low-speed driving instruction is issued, and when the second stage is pressed, an upward high-speed driving instruction is issued. On the other hand, when the lower button 22 is pressed in the first stage, an instruction for low-speed driving in the downward direction is given.

Here, the upper / lower limit stop function and the up / down direction shift point function will be described with reference to FIGS. As shown in FIG. 4, the operator arbitrarily sets the position of the upper limit stop point 25 or the lower limit stop point 26, thereby prohibiting the operation beyond the upper limit stop point 25 or the lower limit stop point 26. In addition, by starting the forced deceleration before the position of the upper limit stop point 25 or the lower limit stop point 26, the position is stopped so as not to exceed the position of the upper limit stop point 25 or the lower limit stop point 26. Further, both the upper limit stop point 25 and the lower limit stop point 26 can be set, or only one can be set.

Here, the position 27 where the forced deceleration starts is automatically calculated by the hoisting / traverse inverter control unit 12 according to the operation speed at that time. The initial setting of the upper limit stop point 25 or the lower limit stop point 26 is performed by operating a key switch (not shown) provided in the hoisting / traverse inverter control unit 12. Specifically, the operation of the key switch provided in the hoisting / traverse inverter control unit 12 causes the crane hook 1 to move to a position where the crane hook 1 is actually stopped after shifting to the setting mode. The position is determined by operating the key switch of the unit 12.

In addition, as shown in FIG. 5, the operator can arbitrarily set the position of the upward shift point 28 or the downward shift point 29 to perform high-speed operation beyond the upward shift point 28 or the downward shift point 29. Ban. In addition, both the upward shift point 28 and the downward shift point 29 can be set, or only one can be set. Initial setting of the upshift point 28 or downshift point 29 is performed by operating a key switch provided in the hoisting / traverse inverter control unit 12. Specifically, the operation of the key switch provided in the hoisting / traverse inverter control unit 12 causes the crane hook 1 to move to a position where the crane hook 1 is actually stopped after shifting to the setting mode. The position is determined by the operation of the unit 12.

Here, the upward shift point 28 or the downward shift point 29 has two operation patterns, and the operation pattern can be set when the upward shift point 28 or the downward shift point 29 is set. As shown in FIG. 5, in the pattern 1, the shift point corresponding to the driving direction operates. For example, during upward operation, only the upward shift point 28 is operated. Therefore, when the crane hook 1 is in the downward direction from the set position of the downward shift point 29, even if an upward high speed operation instruction is given, low speed operation is not possible. Drive at high speed. Pattern 2 is operated at a low speed based on the set position of the shift point regardless of the driving direction. For example, when the crane hook 1 is in the downward direction from the set position of the downward shift point 29, if the upward high speed operation instruction is executed, the low speed operation is performed.

Next, a method for setting the positions of the upper limit stop point 25, the lower limit stop point 26, the upward shift point 28, and the downward shift point 29 using the input device 13 will be described with reference to FIG. This position setting process is performed by the hoisting / traversing inverter control unit 12. The position setting process is periodically executed, for example, every 1 ms. Here, as described above, the initial setting of the positions of the upper limit stop point 25, the lower limit stop point 26, the upward shift point 28, and the downward shift point 29 is a key switch provided in the hoisting / traverse inverter control unit 12. (Not shown). However, in the present embodiment, the input device 13 is used to arbitrarily set the positions of the upper limit stop point 25, the lower limit stop point 26, the upward shift point 28, and the downward shift point 29.

Hereinafter, a method for arbitrarily setting the positions of the upper limit stop point 25, the lower limit stop point 26, the upward shift point 28, and the downward shift point 29 using the input device 13 will be described in detail with reference to FIG. To do.

First, it is determined whether the setting mode is being executed (S101). If not in the setting mode, it is determined whether the vehicle is stopped at the upper limit stop point position or the lower limit stop point position (S102). If the vehicle is stopped at the upper limit stop point position or the lower limit stop point position, the operation input is determined (S103), and the operation mode is changed to one of the setting modes (S104 to S107).

Specifically, in the state where the input signal of the input button 21 is OFF (operation disabled state), the upper button 22 is operated to instruct the upper / low speed operation, thereby shifting to the upward shift point position setting mode ( S104). Further, when the input signal of the input button 21 is OFF, the lower button 23 is operated to instruct the lower low speed operation, thereby shifting to the lower shift point position setting mode (S105). Further, when the input signal of the input button 21 is OFF, the upper button 22 is operated to instruct the upper high speed operation, thereby shifting to the upper limit stop point position setting mode (S106). Further, when the input signal of the input button 21 is OFF, the lower button 23 is operated to instruct the lower high speed operation, thereby shifting to the lower limit stop point position setting mode (S107).

If the vehicle is not stopped at the stop point position but is shifting at the upward shift point position or the downward shift point position (S108), depending on the operation input state (S109), the upward shift point position setting mode (S110) or up The process proceeds to the direction shift point position setting mode (S111). This is because when the upper / lower limit stop function is not used and only the up / down direction shift point function is used, the mode is shifted to the setting mode.

Specifically, in the state where the input signal of the input button 21 is OFF, the upper button 22 is operated to instruct an upper / low speed operation to shift to the upward shift point position setting mode (S110). Further, when the input signal of the input button 21 is OFF, the lower button 23 is operated to instruct the lower low speed operation to shift to the lower shift point position setting mode (S111).

Next, if in the setting mode (S101), first, the operation of the upper / lower limit stop function and the up / down direction shift point function is stopped (S112). For example, when an upper limit stop point is set, there is a problem that the upper limit stop point cannot be moved upward. Therefore, the operation of the function is stopped so that an arbitrary position can be set.

Next, the state of the input signal of the input button 21 is determined (S113). Since the up / down operation is possible if the input signal is ON (operation permitted state), for example, when the current setting mode is the upward shift point position setting mode, the up button 22 or the down button is set to the position where the upward shift point is desired to be set. The crane hook 1 is moved by operating the button 23 (S114). When the position to be set is reached, the input signal is turned OFF (S115), the setting mode is determined (S116), and the current position is set and stored as a position corresponding to each setting mode (S117 to S120). ).

Specifically, in the upward shift point position setting mode, the current position is set as the upward shift point position (S117). In the downward shift point position setting mode, the current position is set as the downward shift point position (S118). In the upper limit stop point position setting mode, the current position is set as the upper limit stop point position (S119). In the lower limit stop point position setting mode, the current position is set as the lower limit stop point position (S120). The stored setting position is stored in a non-volatile RAM so that it is not erased even when the power is turned off. When the position is stored, the normal mode is entered (S121).

Here, by turning off the on button 21, the main power switch 24 is turned off, so that the supply of power is stopped. However, generally, the timing for storing the operation information and the like is when the input signal of the input button 21 is OFF. Therefore, the supply of power to the hoisting and traverse inverter control unit 12 is performed using, for example, a discharge phenomenon of a capacitor in order to ensure the storage processing time. Therefore, even if the power is shut off, the power is supplied to the hoisting and traverse inverter control unit 12 for a certain time, so that the process does not stop.

The input device 13 is configured to stop energization of the operation buttons such as the upper button 22 and the lower button 23 by turning the input button 21 OFF. If the OFF detection timing of the button 22 and the lower button 23 is shifted, the operation buttons such as the upper button 22 and the lower button 23 are ON, and only the input signal of the ON button 21 is OFF. Alternatively, the state of the upper operation or the lower operation under a specific condition may be managed separately from the input detection. For example, if the upper operation is performed in the upper limit stop state and the upper operation state for position change is managed to be ON, only the input signal of the ON button 21 is OFF while the operation of the upper button 22 and the lower button 23 is ON. A state can be made.

According to the above embodiment, even if the power supply to the crane is cut off by turning off the on button 21, the power supply to other operation button circuits is cut off by turning off the on button 21. Even in this case, the electronic upper / lower limit stop position setting and the vertical shift point position setting can be canceled or set by the input device 13. Thereby, the operator can make an optimal setting according to the work at the time.

DESCRIPTION OF SYMBOLS 1 Crane hook 2 Wire rope 3 Hoisting induction motor 4 Hoisting device 5 Traverse induction motor 6 Traverse device 7 Traverse girder 8 Traveling induction motor 9 Traveling device 10 Traveling girder 11 Hoisting and traverse inverter device 12 Hoisting・ Transverse inverter control unit 13 Operation input device 14 Hoisting inverter 15 Crossing inverter 16 Induction motor brake 17 Encoder 18 Traveling inverter device 19 Traveling inverter control unit 20 Traveling inverter 21 On button 22 Up button 23 Down button 24 Main Power switch 25 Upper limit stop point 26 Lower limit stop point 27 Position where forced deceleration starts 28 Upshift point 29 Downshift point 30 Three-phase power supply

Claims (7)

A hoisting machine position setting device for setting a hoisting machine crane hook position,
A control unit for controlling the position of the crane hook;
An input device for giving operation instructions;
The input device is:
Operation instruction means for setting the control unit to an operation-permitted state or an operation-nonpermitted state;
An upward operation instruction means for instructing switching between an upward low speed operation and an upward high speed operation of the crane hook;
A downward operation instruction means for instructing switching between the downward low-speed operation and the downward high-speed operation of the crane hook,
The controller is
By making the operation instruction means in the operation disapproval state, the operation direction is shifted to a position setting mode by an operation instruction from the upward operation instruction means or the downward operation instruction means, and an upper limit stop point position of the crane hook, A position setting device for a hoisting machine, wherein at least one of a lower limit stop point position, an upward shift point position, and a downward shift point position is set. In the position setting mode, the control unit determines the current position of the crane hook in the operation non-permitted state as the upper limit stop point position, the lower limit stop point position, the upper shift point position, or the lower shift point. It sets as a position, The position setting apparatus of the winding machine of Claim 1 characterized by the above-mentioned. The controller is
When the operation instructing unit is in the operation non-permitted state, the lower direction operation instructing unit instructs the lower direction high speed operation to shift to the lower limit stop point position setting mode,
In the operation disapproval state, by instructing the lower direction low speed operation by the downward direction operation instruction means, to shift to the setting mode of the downward shift point position,
In the operation disapproval state, by instructing the upward low speed operation by the upward operation instruction means, to shift to the setting mode of the upward shift point position,
3. The hoisting according to claim 2, wherein, in the operation non-permitted state, the upper-direction high-speed operation is instructed by the up-direction operation instructing unit to shift to the upper limit stop point position setting mode. Machine position setting device. The control unit shifts to the position setting mode even in a state where the energization to the upward operation instruction means, the downward operation instruction means and the hoisting machine is cut off by making the operation non-permission state. The position setting device for a hoist according to claim 1, wherein the position setting device is configured to be possible. 5. The hoisting according to claim 4, wherein the operation instructing means shifts to the position setting mode when the operation is not permitted by utilizing a discharge phenomenon of a capacitor provided in the hoisting machine. Machine position setting device. The transition to the position setting mode when the operation instruction unit is in the operation non-permission state is performed when the control unit determines the detection timing of the operation non-permission state of the operation instruction unit as the upper direction operation instruction unit or the lower direction operation. The position setting device for a hoisting machine according to claim 4, wherein the position setting device is detected by shifting from the detection timing of the instruction means. The control unit energizes the upward operation instruction unit and the downward operation instruction unit by setting the operation instruction unit in the operation permission state, and sets the control unit in an operation permission state to perform the hoisting operation. 2. The hoisting machine position setting device according to claim 1, wherein the hoisting machine is shifted to a normal operation mode in which the machine is operated.

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