JPH0679185A - Overload prevention device for paddy sorting machine - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] To prevent overload hulling of a pair of hulling rolls. [Structure] A hulling section composed of a pair of hulling rolls, a load current sensor 35 for detecting a load current value of a main motor 34 for driving the hulling roll, a removal rate control or a load. An automatic hulling roll clearance adjusting device in which the clearance of the hulling roll is automatically adjusted by current value control, an overload preventing device in which the load current value of the main motor 34 does not exceed an overload reference value, Main motor 3
In the hulling / sorting machine having the breaker switch 41 for cutting off the power supply to No. 4, the minute overload reference value IB which is slightly smaller than the overload reference value IK is set, and the load current value detected by the load current sensor 35 is set. If IF is in the range of IB ≦ IF ≦ IK, but the breaker switch 41 is operated, the overload reference value IK is automatically corrected to a higher side by a predetermined value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention controls the hulling roll while adjusting the gap of the hulling roll by the load current value of the hulling roll driving motor or the removal rate calculated by a removal rate sensor. The present invention relates to an overload prevention device in a hulling and sorting machine.

[0002]

2. Description of the Related Art In a conventional hulling / sorting machine, the clearance of the hulling / rolling roll is automatically adjusted based on the load current value of the motor for driving the hulling / rolling roll or the removal rate calculated by a removal rate sensor. In the hulling and sorting machine, the load current value of the hulling roll driving motor is detected from one of the three-phase currents, and the loader current value of the breaker is the load current from each of the three phases. There is a hulling and sorting machine that detects the value and prevents the overload while carrying out hulling work.

[0003]

In such a prior art, when there is a voltage difference between the three phases due to the power supply situation, the detected load current value of the motor for driving the hulling roll and the reference value. Due to the difference from the load current value, the breaker may drop before the clearance adjustment of the hulling roll to cut off the power supply.

This is because the load current sensor of the main motor detects the low load current value of one of the three-phase power supplies, but the breaker detects the load current value of each phase. However, the detected load current value of the main motor is lower than the control reference value and the control command signal is not output.However, the detected load current value of the load current sensor on the breaker side does not exceed the overload reference value. This is because they are over.

Therefore, the present invention is intended to solve the drawbacks of the prior art by correcting the overload reference value by a special method when the above-mentioned trouble occurs.

[0006]

The present invention has taken the following technical means in order to solve the problems of the prior art. That is, the present invention relates to a pair of hulling rolls 9,
The hulling section 1, the hulling rolls 9 and 9, the load current sensor 35 for detecting the load current value of the main motor 34 for driving, and the hulling by the removal rate control or the load current value control. Automatic clearance control device for paddy rolls that automatically adjusts the clearance between the sliding rolls 9 and 9 and an overload prevention device that prevents the load current value of the main motor 34 from exceeding the overload reference value. In a hulling / sorting machine having a breaker switch 41 for cutting off the power supply to the power supply 34, a small overload reference value IB, which is slightly smaller than the overload reference value IK, is set and detected by the load current sensor 35. When the breaker switch 41 operates even though the load current value IF is in the range of IB ≦ IF ≦ IK, the overload reference value IK is automatically corrected to a higher predetermined value. This is a configuration of an overload prevention device for a hulling and sorting machine.

[0007]

Embodiments of the present invention shown in the drawings will be described below. First, the overall configuration of a hulling and sorting machine will be described with reference to FIG. This hulling / sorting machine is used after hulling in hulling part 1 for hulling, sloping rice wind selecting part 2 for wind-selecting spilled rice from hulling part 1, and sloping rice wind selecting part 2. An oscillating sorting device 3 that sorts slid-down rice into paddy / brown rice, a mixed-grain fried machine 5, a fried grain machine 6, and a fried grain transport section 4 including a brown rice fried machine 7. Then, the paddy hull portion 1 is arranged in the upper front part of the machine body, and the sliding rice wind selecting part 2 is arranged respectively in the lower front part of the machine body, and behind the paddy rice sliding part 1 and the falling rice wind selecting path part 2, A mixed rice fried machine 5 and a hulled grain machine 6 are arranged, a swing sorting device 3 is arranged behind the mixed rice grain mill 5 and the hulled grain machine 6, and behind the swing sorting device 3. This is a configuration in which a brown rice fried machine 7 is arranged.

The paddy hull 1 comprises a paddy hopper 8, a paddy roll 9,
9 is the interior of the hulling chamber 10 and the like, and the hulled rice that has been hulled by the hulling section 1 is the downhill rice wind selection path section 2 below.
It is a structure that flows down to. The sliding rice wind selection unit 2 includes a sliding rice wind selection box 11, a sliding rice wind selection box 11, and a sliding rice wind selection path 12, which is slanted from the lower rear to the upper front. Gutter 13,
It is composed of a scraped-off rice gutter 14, a suction dust collector 15, a dust pipe 16, and the like.

Next, the swing selecting device 3 will be described.
The flat rectangular rocking sorting plates 17, 17, ... Are provided with uneven portions for sorting, and one side in the vertical direction (the direction orthogonal to the paper surface of FIG. 1) has a higher supply side, and the other side. The lower side is the lower discharge side, and the higher one side in the horizontal direction (the left-right direction in FIG. 1) orthogonal to the vertical direction is the swing-up side, and the opposite lower side is the swing-down side. ... has a configuration in which both vertical and horizontal surfaces are inclined.

The swing selection plates 17, 17, ... Are supported by a swing arm (not shown) so that they can swing back and forth diagonally in the lateral direction, and one swing arm (not shown). Is oscillated by an oscillating device (not shown). Swing selection plate 17,1
A supply port is provided in the vertical supply side of 7, ... And in the lateral swaying side portion, and mixed rice is shaken and sorted through the mixed rice hopper 18, the distribution gutter 19 and the distribution case 20. It is supplied to the plates 17, 17, ....

Then, because the mixed rice has a large grain size, a large specific gravity, a large friction coefficient, and the like, the small brown rice having a large specific gravity is unevenly distributed in the brown rice distribution basin on the upper side in the lateral direction, which is the sorting direction. In addition, the paddy, which has a larger and lighter specific gravity than brown rice,
Unevenly distributed mixed rice of unhulled rice and brown rice is unevenly distributed in the mixed rice distribution basin in the middle of the distribution area. A brown rice partition plate 21 and a paddy partition plate 22 are arranged on the discharge side of the rocking sorting plate 17, and the brown rice is separated by the brown rice partition plate 21 and taken out, and the brown rice gutter 23, the brown rice flow path 24, and the brown rice fried grain The mixed rice taken out through the machine 7 and separated by the brown rice partition plate 21 and the paddy partition plate 22 is a mixed rice gutter 25, a mixed rice channel 26, a mixed rice fried machine 5, a mixed rice. It is again circulated and re-sorted through the hopper 18, the distribution gutter 19 and the distribution case 20 to the swing sorting device 3,
The paddy separated by the paddy partition plate 22 is returned to the paddy hull 1 through the paddy gutter 27, the paddy flow path 28, and the paddy grain elevator 6 and is padded again.

Next, FIGS. 2 to 3 will be described. A supply amount switch 30 for setting the opening degree of the paddy supply control valve 29,
A removal rate switch 31 that sets the removal rate, a grain sensor 32 that detects the presence or absence of grains in the paddy hopper 8, a light emitting element and a light receiving element, and removes the slid rice after hulling / wind selection. The depletion rate sensor 33 for detecting the rate, the load current sensor 35 for detecting the load current value of the main motor 34 for driving the hulling rolls 9, 9 and the paddy supply control valve opening sensor 36 are input interface sensors. −
Through the face, it is connected to a CPU having a built-in arithmetic unit and a register unit, and an arithmetic control unit 37 including a program memory and an arithmetic memory.

Further, a roll gap adjusting motor 38 for opening and closing the gap between the hulling rolls 9 and 9 and an opening and closing of the paddy supply adjusting valve 29 are controlled by the arithmetic and control unit 37 via an output interface and a drive circuit. A control command signal is output to the paddy supply adjusting motor 39 and the electromagnetic switch 40.
Reference numeral 41 is a breaker switch. Next, the control content of the arithmetic control unit 37 will be described. First, the removal rate switch 31 is set to a predetermined scale to set a desired removal rate, the supply amount switch 30 is set to a desired supply amount, and an operation switch (not shown) is operated to select hulls. The rotating parts of the machine are driven. Next, the initial clearance setting control of the hulling roll is started.
That is, a gap opening command signal from the arithmetic control unit 37 is sent to the roll gap adjusting motor 38 to open the gap between the hulling rolls 9 for a predetermined time, and the load current value detected by the load current sensor 35 does not change. When the non-contact state is detected, a closing command signal for the hulling rolls 9, 9 is output to the roll gap adjusting motor 38. Next, when the load current sensor 35 detects a predetermined increase in the load current value and slight contact of the hulling rolls 9 and 9 is detected, the output of the closing command signal is stopped and the hulling rolls 9 and 9 are stopped. The closing movement is stopped, and then the opening command signal for setting the initial clearance is given to the roll clearance adjusting motor 38 for a predetermined time.
Is output to the hulling rolls 9, 9 and the initial gap (for example, 1
mm) is adjusted and set. When the initial clearance setting control of the hulling roll is completed, an open command signal from the arithmetic control unit 37 is then output to the hull supply adjusting motor 39 for a predetermined time to open the hull supply adjusting valve 29 of the hulling unit 1 by a predetermined opening degree. The initial opening is set to (for example, 10 mm), and the hulling operation is started. Then, in this hulling state, the light amount of the light emitting element of the removal rate sensor 33 is optimized and adjusted.

Next, a control command signal based on the large / medium / small adjustment setting of the supply amount switch 30 is sent to the paddy supply adjusting motor 39, and the paddy supply adjusting valve 29 is adjusted to the set efficiency opening. The hulling work is started with the desired amount of hull supply. Next, the removal rate control is entered. The voltage signal of the grain that has passed through the removal rate sensor 33 is input to the arithmetic control unit 37 via the sample hold circuit (not shown) and the A / D conversion circuit (not shown), and the voltage signal is directly When the arithmetic control unit 37 is interrupted and the voltage signal of a predetermined number of sample grains is read, the removal rate is calculated. Next, the control reference removal rate set by the removal rate switch 31 in the arithmetic and control unit 37 is compared with the calculated removal rate, and the control reference removal rate is higher (or lower) than the calculated removal rate.
In this case, an opening command signal (or a closing command signal) is output to the roll gap adjusting motor 38, and the gap between the hulling rolls 9 and 9 is adjusted to the open side (or the close side) by a predetermined amount to set the removal rate. When the calculated removal rate is within the range of the reference removal rate, the control command signal is not output and the hulling work is performed while maintaining the hulling roll gap as it is. It is what is done. Instead of the removal rate control, the clearance of the hulling roll may be adjusted by load control based on the load current value of the main motor 34 for driving the hulling roll. Next, automatic correction of the control reference value for overload prevention control will be described. During the hulling operation, the detected load current value IF is input from the load current sensor 35 and compared with the overload reference value IK, and the detected load current value IF exceeds the overload reference value IK.
In case of the overload, the opening command signal of the hulling roll is output to the roll clearance adjusting motor 38 for a predetermined time (or until it becomes less than the overload reference value), and the overload prevention control is performed. While hulling is done, the hulling and sorting work is performed.

Although such overload prevention control is performed, a minute overload reference value IB which is slightly smaller than the overload reference value IK is set, and the detected load current value IF is IB≤.
Despite the range of IF ≦ IK, the breaker switch 41 is lowered, the driving of the hulling rolls 9 and 9 is stopped,
When the power of the control box with the arithmetic control unit 37 is turned off, the operation switch (not shown) is turned on when the next operation is restarted, and the power is supplied. The load reference value IK is automatically corrected to a predetermined value.

Therefore, the load current sensor 3 of the main motor 34
5 detects the low load current value of one of the three-phase currents, and the detected value does not match the load current sensor detecting the load current value of each phase of the breaker switch 41. In this case, the detected load current value IF is lower than the overload reference value IK, and the control command signal is not output, but the detected load current value of the load current sensor on the breaker switch 41 side is the predetermined power supply. When the amount is over, when the operation switch (not shown) is turned on, the overload reference value IK is automatically corrected to a predetermined amount higher when the next work is restarted. It is possible to prevent breakage of the power switch 41 and efficiently perform the hulling and sorting operation.

When the detected load current value IF> overload reference value IK, the main motor 3 for driving the hulling rolls 9 and 9 is used.
Since 4 is a failure, the overload reference value is not corrected, and
If the detected load current value IF> the minute overload reference value IB, it means that the breaker switch 41 is erroneously assembled or the load current sensor 35 is defective, so the overload reference value is not corrected. Next, a description will be given of the work ending process of the hull roll gap adjustment in the case where the hull is supplied to the hull hopper 8 of the hulling section 1 by a grain bag (not shown). When the grainless detection information of the grain sensor 32 in the paddy hopper 8 is input, it is determined that the hulling work is completed, and after the elapse of a predetermined work completion signal output time, the arithmetic control unit 37 causes the roll gap adjustment mode. -Ta 38
A control command signal for stopping the adjustment (or stopping the adjustment after opening and adjusting the hulling roll gap only for a predetermined time) is output to stop the adjustment of the hulling roll gap. The hulling rolls 9 and 9 are stopped while the gap between the hulling rolls 9 and 9 remains the same as the roll gap during the work (or a state in which a gap wider than the work gap by a predetermined gap is maintained). This prevents problems such as contact between the rolls 9 and 9.

In the work end processing control of the hulling roll, when the bag swelling sensor 42 is arranged near the paddy hopper 8 and grain is supplied from the grain bag to the paddy hopper 8,
When the grain contacts the bag swelling sensor 42 and the bag supply information is input to the arithmetic control unit 37 and it is determined that the bag is in the supply state, the correction time is added to the predetermined (standard) work end signal output time. Accordingly, the work end signal output time is changed to be long. Therefore, when the hulling / sorting operation is performed in the bag-supplied state, even if the grain sensor 32 of the paddy hopper 8 detects that no grain is present, after a long work end signal output time to which the correction time is added, -A control command signal for the work ending process is output to the roll gap adjusting motor 38 to reduce the frequency of the work ending process, reduce the paddy supply amount, or decrease the removal rate by opening the hull rolling roll gap. It is possible to prevent such inconvenience. In addition,
Instead of the bag squeezing sensor 42 of this embodiment,
A configuration in which the cut-off switch is used to input whether to bag the bag into the arithmetic control unit 37, or a structure in which the bag sensor is automatically judged to be bag bag based on the frequency with which the grain sensor 32 detects the absence of grain in a predetermined time. May be

Next, the operation of the embodiment shown in FIG. 1 will be described. When performing the hulling work, when the hull is supplied to the hull hopper 8 of the hull portion 1 and an operation switch (not shown) is turned on,
The paddy is hulled by the hulling rolls 9 and 9, the slid rice flows down to the slidable rice wind selecting section 2 below, and the rice husk having a low specific gravity passes through the suction dust collector 15 and the dust collecting pipe 16. After that, the mixed rice having a high specific gravity is discharged to the outside of the machine, and is dropped and sorted by the scraped rice receiving trough 14. Next, the mixed rice that has dropped onto the drop-off rice receiving trough 14 is fried by the mixed rice lifting machine 5 and passed through the mixed rice hopper 18, the distribution gutter 19 and the distribution case 20, and the rocking sorting plates 17, 17 ,. Is supplied to. The mixed rice fed to the rocking sorting plates 17, 17, ... is oscillated vertically in the horizontal direction, and has a small specific gravity due to the grain size, the specific gravity, and the friction coefficient. Brown rice is unevenly distributed in the brown rice distribution basin on the horizontal shaking side, and unhulled rice with a larger and lighter specific gravity than the brown rice is unevenly distributed in the hull distribution basin on the horizontal swaying side, and in the middle part. The non-separated mixed rice of unhulled rice and brown rice is unevenly distributed, and these grains are separated by the unhulled rice partition plate 21 and the unhulled rice partition plate 22 and taken out.

During the hulling sorting operation as described above, the gap between the hulling rolls 9 and 9 is automatically adjusted by the removal rate control or the load current value control, and the load current sensor 35 detects the detected load current. The value IF is input and compared with the overload reference value IK, and when the detected load current value IF is over the overload reference value IK, the roll clearance adjusting motor 38 is hulled. A rolling opening command signal is output, and hulling work is performed while overload prevention control is performed.

In such overload prevention control, a minute overload reference value IB which is slightly smaller than the overload reference value IK is set, and the detected load current value IF is in the range of IB≤IF≤IK. If the breaker switch 41 is turned off to stop driving the hulling rolls 9 and 9, the operation switch (not shown) is turned on at the time of the next operation, and the power is supplied. Since the overload reference value IK in the control section 37 is automatically corrected to a predetermined value, the main motor 34
Load current sensor 35 detects the low load current value of one phase of the three-phase power supply, and the detected value with the load current sensor detecting the load current value from each phase of the breaker switch 41 is When they do not match, the detected load current value IF is lower than the overload reference value IK and the control command signal is not output, but the detected load current value of the load current sensor on the breaker switch 41 side is Even when the predetermined power supply amount is over, from the next work, the overload reference value I
Since K is automatically corrected to a predetermined amount higher, the breaker switch 41 can be prevented from being cut off from the next time, and the hull sorting operation can be efficiently performed.

[0022]

Since the present invention is constructed as described above, the gap between the hulling rolls 9 and 9 is automatically adjusted by the removal rate control or the load current value control, and the load is reduced. The hulling operation is performed while the overload prevention control is performed so that the detected load current value IF from the current sensor 35 does not exceed the overload reference value IK. Then, a minute overload reference value IB which is slightly smaller than the overload reference value IK is set, and the detected load current value IF of the load current sensor 35 is IB.
If the breaker switch 41 falls and the drive of the hulling rolls 9 is stopped despite the range of ≦ IF ≦ IK, the overload reference value IK is set to a predetermined value from the next work. Since the configuration is such that the value is automatically corrected to a high value, the load current sensor 35 of the main motor 34 detects the low load current value of one phase of the three-phase power source, and the load current detected by the breaker switch 41 is detected. Even if the value does not match the value, the breaker switch 41 can be prevented from being cut off from the next restarting work, and the hulling and sorting work can be efficiently performed.

[Brief description of drawings]

[Figure 1] Whole cut side view

FIG. 2 is a cutaway side view of a main part.

FIG. 3 is a block diagram.

[Explanation of symbols]

 1 Rice hulling part 2 Sliding rice wind selection part 3 Oscillating sorting device 4 Lifting grain conveying part 5 Mixed rice grain lifting machine 6 Paddy grain lifting machine 7 Brown rice graining machine 8 Paddy hopper 9 Paddy roll 10 Paddying room 11 Sliding down Rice-style selection box 12 Sliding rice-style selection path 13 Pile receiving gutter 14 Sliding rice receiving gutter 15 Suction dust collector 16 Dust collecting cylinder 17 Swiveling sorting plate 18 Mixed rice hopper 19 Distribution gutter 20 Distribution case 21 Brown rice partition plate 22 Paddy partition plate 23 Brown rice gutter 24 Brown rice flow path 25 Mixed rice gutter 26 Mixed rice flow path 27 Paddy gutter 28 Paddy flow path 29 Paddy supply control valve 30 Supply amount switch 31 Removal rate switch 32 Glen sensor 33 Depth Rate sensor 34 Main motor 35 Load current sensor 36 Paddy supply adjusting valve opening sensor 37 Arithmetic control unit 38 Roll gap adjusting motor 39 Paddy supply adjusting motor 40 Electromagnetic switch 41 Breaker switch 42 Bag tightening sensor

Claims (1)

[Claims] 1. A load current for detecting a load current value of a main motor 34 for driving a hulling portion 1, a hulling roll 9, 9 composed of a pair of hulling rolls 9, 9. A sensor 35, a hulling roll gap automatic adjusting device for automatically adjusting the gap between the hulling rolls 9 and 9 by controlling the removal rate or the load current value, a main mode.
In a hulling and sorting machine having an overload prevention device for preventing the load current value of the motor 34 from exceeding the overload reference value and a breaker switch 41 for cutting off the power supply to the main motor 34, the overload reference value IK A minute overload reference value IB which is slightly smaller than the above is set, and the detected load current value IF of the load current sensor 35 is set.
However, when the breaker switch 41 operates, the overload reference value IK is automatically corrected to a high predetermined value even though the range of IB ≦ IF ≦ IK is satisfied. Overload prevention device.