JPH11253823A - Initial gap setter of husking roll - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smooth the initial setting of a roll gap by deciding the contactless state of the roll gap after a prescribed time even when the fluctuation width of the load current value of a main motor 34 is so large that the compared value of the detected load current values before and after the time dose not attain a roll gap open reference value and the decision of a roll gap open state is difficult. SOLUTION: Control is started and when a main motor is on, a timer function of the prescribed time is set to start the roll gap open output of husking rolls. The load current value of the main motor is detected at every prescribed time and whether the difference between the detected values before and after the time is below the prescribed value or not is decided. If the difference is too large and the decision of the contactless state of the husking roll gap is not possible, whether the prescribed time elapses or not is decided. The lapse of the prescribed time is decided to be the contactless state of the husking roll gap. The roll gap open output is then stopped. The roll gap close output is thereafter started and the load current value is detected at every prescribed time. The presence or absence of the contact of the husking roll is decided by whether the detected load current value fluctuates or not. The fluctuation above the prescribed value is decided to be the contact state of the husking rolls and the roll gap close output is stopped. The roll gap open output is then continued for the prescribed time to end the initial setting control of the roll gap.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an initial gap setting device for a hulling roll.

[0002]

2. Description of the Related Art As a roll gap initial setting device for a hulling roll, first, a roll gap is opened and adjusted, and when a load current value detected by a load current sensor does not change or falls below a predetermined value, a hulling is performed. When the roll adjustment is determined to be in a non-contact state, the opening adjustment is stopped, and then the roll gap is adjusted to close, and when the load current sensor detects an increase in the load current value, it is determined that the hulling roll is in slight contact, and the closing adjustment is performed. Techniques for stopping and then adjusting the roll gap to a predetermined initial gap by opening and adjusting the roll gap for a predetermined time are known.

[0003]

SUMMARY OF THE INVENTION In the apparatus for initially setting the roll gap of a rice hulling sorter that drives a main motor via an inverter, the fluctuation width of the detected load current value of the main motor is large, and the opening of the roll gap is adjusted. However, since the roll gap does not reach the predetermined roll gap opening reference value, the non-contact state of the roll gap cannot be determined, and the problem that the initial roll gap cannot be set smoothly occurs.

The present invention is intended to smoothly control the initial setting of the roll gap of the hulling roll even when it is difficult to determine the non-contact state of the roll gap.

[0005]

The technical means of the present invention for solving such a technical problem is the inverter 43.
Hulling roll driving means for driving the hulling rolls 7, 7 with a main motor 34, a load current sensor 32 for detecting a load current value of the main motor 34, and a load current value of the main motor 34 Roll initial setting means for opening and closing the roll gap of the rice hulling rolls 7 while detecting the load current sensor 32 to set an initial roll gap, and the detected load current values before and after the roll gap initial setting means In determining the non-contact state of the hulling rolls 7, 7 when the value is equal to or less than a predetermined value, it is determined that the hulling rolls 7, 7 are in a non-contact state when a predetermined time has elapsed even if the predetermined value is not reached. A hulling roll contact determination unit and a hulling roll initial gap setting device were configured.

[0006]

When this control is started, the main motor 34 is turned ON / O.
FF is determined, and when ON, a timer function for a predetermined time is set, the output of the roll gap opening of the hulling rolls 7, 7 is started, and the load current value of the main motor 34 is detected every predetermined time,
It is determined whether or not the difference between the previous detection value and the present detection value is equal to or less than a predetermined value.If the difference is large and the non-contact state of the roll gap cannot be determined, it is determined whether or not a predetermined time has elapsed. When the time elapses, it is determined that the hulling rolls 7, 7 are in a non-contact state, and the roll gap opening output is stopped.

Next, a roll gap closing output is started, a load current value is detected at predetermined time intervals, and it is determined whether or not the hulling rolls 7 are in contact with each other based on whether the detected load current value fluctuates by a predetermined value or more. I do. And when it fluctuates by a predetermined value or more, it is determined that the hulling rolls 7 and 7 are in contact with each other, the roll gap closing output is stopped, and then the roll gap opening output is performed for a predetermined time.
The roll gap initial setting control ends.

[0008]

According to the present invention, since the above control is performed, when the main motor 34 is driven by the inverter 43,
Even when the fluctuation range of the load current value of the main motor 34 is large and the comparison value of the detected load current values before and after does not reach the roll gap opening reference value and it is difficult to determine the roll gap opening state, the predetermined time is also required. Determines the non-contact state of the roll gap, so that the initial setting of the roll gap can be smoothly performed.

[0009]

Embodiments of the present invention shown in the drawings will be described below. First, the overall configuration of a hulling sorter will be described with reference to FIG. The rice hulling sorter is a rice hulling unit that performs hulling 1, a rice hulling rice selection unit that wind-selects rice hulled from the rice hulling unit 1, and a mixing after wind selection in a rice hulling rice selection unit 2. It comprises a rocking sorting section 3 for separating and sorting rice, a mixed rice frying machine 4, a brown rice frying machine 5, and the like.

The hulling unit 1 includes a hulling hopper 6, a hulling roll 7,
The hulling room 8 is provided with an interior such as 7. The rice-slide selection unit 2 includes a rice-slice selection box 9, a rice-slice selection path 10 slanted in the rice-slice selection box 9, a pity trough 11, and a rice-strip trough 12. , A suction fan 13, a dust discharge tube 14, and the like. Next, the swing sorting unit 3 will be described. The multi-stage swing sorting plates 15, 15,... Are provided with sorting unevenness on the plate surface. One side in the vertical direction is a high supply side, the other side is a low discharge side, and one side in the horizontal direction. The side is a high swinging side, the opposite side is a low swinging side, and the vertical and horizontal directions of the swing selection plate 15 are both inclined. .

The mixed rice is supplied to a supply port formed on the vertical supply side of the oscillating sorting plate 15 through a mixed rice fryer 4, a distribution supply gutter 16 and a distribution case 17. is there. The mixed rice supplied to the swing sorting plate 15 is
Due to the relationship between the size of the grain, the specific gravity, and the friction coefficient,
Small brown rice with a heavy specific gravity is distributed in a drifting direction on the upper side in the horizontal direction,
In addition, paddy having a relatively large specific gravity compared to brown rice has a drift distribution in the lateral swinging side, and mixed rice of unseparated paddy / brown rice has a drift distribution in an intermediate portion thereof, and these grains are The rice is separated by a brown rice partitioning plate 18 and a paddy partitioning plate 19 which are provided to face the discharge side of the swing sorting plate 15.

The brown rice separated by the brown rice partition plate 18 is taken out of the machine through a brown rice extraction gutter 20, a brown rice channel 21, and a brown rice milling machine 5, and the mixed rice is mixed rice extraction gutter 22, a mixed rice Via the flow path 23, the sliding rice receiving gutter 12, the mixed rice fryer 4, the mixed rice hopper 24, the distribution supply gutter 16 and the distribution case 17, it is again supplied to the rocking sorting plate 15 and re-sorted. The hulled rice is returned to the hulling unit 1 through the hulling gutter 25, the hulling flow path 26, and the hulling machine 27, and the hulling is performed again.

Although the drawings are omitted, the mixed rice hopper 2
4 and the hulling supply control valve 38 of the hulling unit 1 are interlockingly connected via an interlocking member such as a link, and when the mixed rice hopper 24 moves down or up due to an increase or decrease in the amount of grain, the hulling supply control valve. Reference numeral 38 relates to a configuration that is adjusted to decrease or increase. FIG. 2 shows a known configuration for adjusting the roll gap between the hulling rolls 7, 7.
By rotating the roller 7 forward or backward, the roll gap is opened and closed via the roll gap adjusting means 36.

Next, based on FIG. 3, the drive configuration of the main motor 34 via the inverter 43, the input configuration of sensors and switches to a control microcomputer (hereinafter referred to as a control unit) 41, and The connection configuration to the actuator will be described. For example, an AC single-phase 200 volt commercial power supply is supplied to the inverter 43 via the power switch 44 and the reactor 47, converted into an AC three-phase 200 volt current by the inverter 43, and supplied to the main motor 34. In this configuration, a control power supply is taken out of the power supply, and the controller 48 inside the control unit 41 is driven.

The control unit 41 includes a grain sensor 28 for detecting the presence or absence of grains in the paddy hopper 6, an automatic / manual changeover switch 29, a switch 30 for raising the rate, a switch 31 for lowering the rate.
The load current sensor 32, the paddy supply control valve opening sensor 33 for detecting the opening of the paddy supply control valve 38 of the rice hulling unit 1, and the inverter presence / absence detection sensor 45 are connected to each other. In addition, the control unit 41 controls the main motor 34 for driving the hulling sorter, the hulling supply control valve adjusting motor 35 for adjusting the opening degree of the hulling supply adjustment valve 38, and the roll gap adjusting means 36 via the driving circuit. Roll gap adjusting motors 37 are connected respectively.

Next, the control contents of the control unit 41 will be described. (1) First, the automatic / manual switch 29 is set to the automatic side, and the operation / stop switch 46 is turned on. Then, the main motor 34 is driven, and the rotating parts of the hulling sorter are driven. Next, an initial gap setting control for setting an initial gap between the hulling rolls 7, 7 is executed. First, the roll gap is opened, and when the detected load current value of the load current sensor 32 does not change, it is determined that the hulling rolls 7, 7 are in a non-contact state, and the opening adjustment is stopped. When the load current sensor 32 detects the increase in the load current value by performing the closing adjustment, it is determined that the hulling rolls 7 and 7 are in slight contact, and the closing adjustment is stopped. Then, the roll gap is opened and adjusted for a predetermined time. The predetermined initial gap (for example, 1 mm) is adjusted and set, and the initial gap setting control ends.

(2) Next, the process proceeds to the shutter opening initial setting control for adjusting the paddy supply control valve 38 of the paddy hopper 6 to the initial opening. Then, an open command for a predetermined time is issued to the paddy supply control valve adjusting motor 35, and the paddy supply control valve 38 is opened and adjusted to a predetermined opening (for example, 10 mm). Then, the paddy is supplied from the paddy hopper 6 to the paddy rolls 7, 7 and the padding operation is started.

(3) Next, the process shifts to control of the roll gap based on the load current value. Then, for a predetermined time (for example,
(5 minutes), the process is shifted to the work stabilization waiting process. During that time, the adjustment of the opening and closing of the roll gap of the hulling rolls 7, 7 is stopped, and the hulling operation is performed with the roll gap fixed. When the predetermined time ends, the opening degree of the paddy supply control valve 38 is detected by the paddy supply control valve opening sensor 33, and the load current value of the main motor 34 is detected by the load current sensor 32. Then, a reference load current value corresponding to the valve opening is calculated and determined. Next, the detected load current value is compared with the reference load current value. If the detected load current value is higher (or lower) than the reference load current value, the roll gap adjusting motor 37 is opened (or closed) for a predetermined time. Side) and roll gap control for returning the detected load current value to the reference load current value is executed. Also,
If the detected load current value is within the range of the reference load current value, a control command is not issued, and the hulling operation is continued while maintaining the roll gap as it is.

(4) Next, the control shown in FIG. 4 will be described. The load current value of the main motor 34 driven by the inverter 43 has a larger fluctuation range (ripple) than the normal motor. When the roll gap control of the hulling rolls 7, 7 is performed based on the load current value of the main motor 34,
In the type in which the roll gap control is started after the load current value is stabilized and the shift is performed on condition that the detected load current value becomes a predetermined reference value, the load current value is not changed even after a predetermined time has elapsed. There is a problem that the stabilization process is not completed, the roll gap control based on the load current value cannot be started, the hulling work is performed with the roll gap control stopped, and the shedding rate decreases. Atsuta. Therefore, an attempt is made to solve such a problem.

Next, the control contents will be described with reference to FIG. When this control is started and the main motor 34 is turned on, the roll gap initial setting control of the hulling rolls 7, 7 is executed, for example, in the same manner as described above. Next, whether or not the hulling work is started by the hulling rolls 7, 7 is determined by, for example, the main motor 3.
The determination is made based on whether the load current value of No. 4 has become higher than the reference value.

Thus, when the hulling work is started, in order to determine whether or not the work stabilization process has been completed, first,
It is determined whether a predetermined time (for example, 5 minutes) has elapsed, and when the predetermined time has elapsed, a timer function is set. Next, the load current value of the main motor 34 is detected every predetermined time (for example, one second), and the difference from the previous detection value is determined by a predetermined value (for example,
(± 0.3 amperes) or less, and if it is less than a predetermined value, it is determined that the load current value is stable, and it is assumed that the work stabilization process has been completed and roll gap control based on the load current value is started. I do.

When the difference is larger than the predetermined value,
It is determined whether or not a predetermined time (for example, one minute) has elapsed. When the predetermined time has elapsed, it is determined that the work stabilization process has been completed, and roll gap control based on the load current value is similarly started. Since the above control is performed, the inverter 43
When the main motor 34 is driven, even if the fluctuation range of the load current value of the main motor 34 is large, after a predetermined time, the process proceeds to the roll gap control of the hulling rolls 7 based on the load current value of the main motor 34. It is possible to prevent a decrease in the shedding rate due to a prolonged hulling operation in a fixed state in which the roll gap is stopped, and to perform a hulling operation smoothly. (5) Next, the embodiment shown in FIG. 5 will be described.

In this embodiment, in the initial setting control of the roll gap of the hulling sorter that drives the main motor 34 through the inverter 43, the fluctuation range of the detected load current value of the main motor 34 is large, and the no-load current value is specified. Even when it is not possible to determine the non-contact state of the roll gap, the roll gap initial setting control of the hulling rolls 7 can be performed early.

The contents of the control will be described with reference to the flow chart of FIG.
This control is started, ON / OFF of the main motor 34 is determined, and when it is ON, a timer function is set, and the output of the roll gap opening of the hulling rolls 7, 7 is started, and every predetermined time (for example, 1 second) First, the load current value of the main motor 34 is detected, and it is determined whether or not the difference between the previous detection value and the present detection value is equal to or less than a predetermined value (for example, ± 0.3 amps). When the non-contact state cannot be determined, it is determined whether or not a predetermined time (for example, 3 seconds) has elapsed. When the predetermined time has elapsed, it is determined that there is no load, and the roll gap opening output is stopped.

Next, a roll gap closing output is started, a load current value is detected at predetermined time intervals, and it is determined whether or not the hulling rolls 7 are in contact with each other based on whether the detected load current value fluctuates by a predetermined value or more. I do. Therefore, when the variation is equal to or more than the predetermined value, it is determined that the hulling roll is in contact and the roll gap closing output is stopped, and then the roll gap opening output is performed for a predetermined time, and the initial setting control of the roll gap is ended. I do.

If the difference from the previous detection value is equal to or less than a predetermined value (for example, ± 0.3 amperes), it is determined that the hulling rolls 7, 7 are in a non-contact state, and the The initial setting control of the gap is executed. Since the control as described above is performed, when the main motor 34 is driven by the inverter 43, the fluctuation range of the load current value of the main motor 34 is large, and the non-contact state of the hulling rolls 7, 7 is detected by the detected load current value. Even when it cannot be determined, the non-contact state of the roll gap can be determined after a predetermined time, and the initial setting of the roll gap can be smoothly performed. (6) Next, the embodiment shown in FIG. 6 will be described.

In this embodiment, in the roll clearance control based on the load current value of the hulling sorter that drives the main motor 34 via the inverter 43, even when the fluctuation range of the detected load current value of the main motor 34 is large, The purpose is to shift to the roll gap based on the load current value at an early stage and to smoothly perform the hulling work. The load current value of the inverter-driven main motor has a larger fluctuation range than that of a normal motor. After the initial setting of the roll gap, the detected load current value is stabilized, and in the case of shifting to roll gap control based on the load current value, if the detected load current value fluctuates beyond the neutral width which is the reference value, However, there was a problem that it was not possible to smoothly proceed to the next step. This embodiment is to solve such a problem.

The control contents will be described with reference to the flow of FIG.
When this control is started, the presence / absence of the inverter 43 is detected by the inverter presence / absence detection sensor 45. If the inverter 43 is absent, the load current value is detected at predetermined time intervals, and the difference between the previous detection value and the current detection value is determined. Value (for example, ± 0.3
Amperage) or less, and if it is less than a predetermined value, it is determined that the detected load current value is stable, and the process shifts to roll gap control based on the load current value in the next process.

When the inverter 43 is provided, the load current value is detected at a predetermined time interval, and the difference between the previous detection value and the current detection value is corrected to a large predetermined value (eg, ± 0.5 amperes) or less. It is determined whether or not there is:
When it is determined that the detected load current value has become stable, the process proceeds to roll gap control based on the load current value in the next process, and roll gap control based on the load current value is executed.

When the inverter 43 is provided, the neutral width in the initial setting control of the roll gap may be largely corrected. FIG. 7 shows the control flow. Next, an embodiment shown in FIG. 8 will be described. In this embodiment, a roll gap adjusting motor 37 for adjusting the roll gap between the hulling rolls 7, 7 is driven by a commercial power supply, and the inverter 43 drives the main motor 34 at a frequency different from the commercial power supply. The frequency of the commercial power supply and the output side frequency of the inverter 43 are respectively detected, the output time of the roll gap adjusting motor 37 is corrected by the frequency of the commercial power supply, and the roll based on the load current value is determined by the output side frequency of the inverter 43. The feature is to correct the reference current value of the gap control, and to make the roll gap control accurate.

In the conventional apparatus, in the roll gap initial setting control of the hulling rolls 7, 7, the opening and closing time of the roll gap is switched depending on whether the power supply frequency is 50 Hz or 60 Hz, or the roll gap is determined based on the load current value. In performing the control, the control reference load current value is corrected based on whether the frequency is 50 Hz or 60 Hz. Inverter 4
In the configuration in which the main motor 34 is driven at a constant rotation speed at the time of a voltage drop or the like in 3, the frequency of the main motor 34 is different from the frequency of the commercial power supply. Is intended to be accurate.

As shown in FIG. 8, for example, a 50-Hz single-phase 200 volt commercial power supply is supplied to a main motor 34 via a power switch 44, a reactor 47, and an inverter 43.
And a control current is extracted from a commercial power supply, and a controller 48 having a control unit 41 therein is driven. A power supply frequency detection circuit 49 for detecting the frequency of the commercial power supply and a main motor current frequency detection circuit 50 for detecting the frequency on the output side of the inverter 43 are connected to the control unit 41 via an input interface. Output interface,
A roll gap adjusting motor 37 driven at a commercial power frequency is connected via a drive circuit.

As described above, the roll gap adjusting motor 37
Since the opening and closing of the roll gap is adjusted by the correction time corresponding to the commercial power supply frequency, the roll gap adjustment becomes accurate, and the load factor of the main motor 34 is made substantially equal in accordance with the frequency characteristics of the main motor 34. Since the load current value reference is corrected according to the frequency, the roll gap control based on the load current value reference can be made accurate.

[Brief description of the drawings]

FIG. 1 is an overall cut side view.

FIG. 2 is a cut side view.

FIG. 3 is a block diagram.

FIG. 4 is a flowchart.

FIG. 5 is a flowchart.

FIG. 6 is a flowchart.

FIG. 7 is a flowchart.

FIG. 8 is a block diagram.

[Explanation of symbols]

1 ... rice hulling part, 2 ... rice falling rice style selection part, 3 ... rocking sorting part, 4 ...
Mixed rice fryer, 5 ... Brown rice fryer, 6 ... Rice hopper, 7 ... Rice hulling roll, 8 ... Rice hulling room, 9 ... Rice crushed rice selection box, 10 ... Rice crushed rice selection path, 11 ... Pity trough, 12: sliding rice trough, 13: suction fan, 14: dust cylinder, 15: swing sorting plate, 16: distribution supply gutter, 17: distribution case, 18: brown rice partition plate, 19
... Rice partition plate, 20 ... Brown rice extraction gutter, 21 ... Brown rice channel, 22
... mixed rice extraction gutter, 23 ... mixed rice channel, 24 ... mixed rice hopper, 25 ... paddy extraction gutter, 26 ... paddy channel, 27 ... paddying machine,
28: Glen sensor, 29: Automatic / manual switch,
30: switch for escape rate, 31: switch for escape rate, 3
2 ... Load current sensor, 33 ... Rice supply control valve opening degree sensor,
34 ... Main motor, 35 ... Rice supply control valve control motor, 36
... roll gap adjusting means, 37 ... roll gap adjusting motor,
38 ... Rice supply control valve, 39 ... Operation panel, 41 ... Control unit, 43 ... Inverter, 44 ... Power switch, 45 ... Inverter presence / absence detection sensor, 46 ... Operation stop switch, 4
7 reactor, 48 controller 49 power supply frequency detection circuit, 50 main motor current frequency detection circuit.

Claims (1)

[Claims] A hulling roll driving means for driving hulling rolls with a main motor having an inverter, and a load current sensor for detecting a load current value of the main motor.
Roll gap initial setting means for setting the initial roll gap by opening and closing the roll gap between the hulling rolls 7 while detecting the load current value of the main motor 34 with the load current sensor 32; When comparing the detected load current values before and after the gap initial setting means with a predetermined value or less to determine the non-contact state of the hulling rolls 7, the hulling is performed when a predetermined time has elapsed even if the predetermined value is not reached. A hulling roll initial gap setting device, comprising: a hulling roll contact determination unit that determines that the rolls 7 are in a non-contact state.