JPH11114436A - Automatic control method in hulling selector by belt transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a roll from opening in a normal hulling state by a method in which during hulling work, amperage is measure under specified measuring conditions, and when the increase of the amperage is a specified value or above and the increase lasts for a specified length of time, the clearance of hulling rolls is opened by a roll clearance control motor. SOLUTION: When unhulled rice is exhausted during hulling work, the clearance of hulling rolls 33, 34 is increased automatically. A similar phenomenon takes place by other causes. Therefore, to judge the reason, average amperage during 39 sec, comparison standard amperage, and work average amperage are measure at intervals of 0.2 sec, and when the increase of amperage is 0.5 A or above and has lasted for 30 sec, a roll clearance control motor 63 is energized to increase the clearance of the rolls 33, 34. To supplement the clearance of the increasing work of the rolls 33, 34 by the motor 63, a manual operation switch is operated. In this way, the unnecessary opening the clearance of the rolls 33, 34 can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic control method in a hulling sorter by belt transmission.

[0002]

2. Description of the Related Art Conventionally, Japanese Patent Publication No. Sho 63-15026 discloses a method in which paddy rice put into a supply hopper is hulled by a pair of hulling rolls. It describes a device that automatically joins to the main motor, knows the joining by comparing it with the no-load current value of the main motor, and then opens it 1 mm with a timer to make initial settings. Also, as disclosed in JP-A-58-114742, which is separately known.
In the official gazette, it is necessary to detect the opening of the paddy supply valve, determine the current value based on the theoretical loss rate according to the opening of the paddy supply valve, and determine the current value based on the opening of the paddy supply valve. It describes a method of automatically adjusting a roll gap when a current value of an actual detachment rate is detected and the actual current value deviates from a theoretical current value. Further, apart from the above, the hulling sorter of FIG. 1 is also known. In FIG. 1, A is a hulling wind selection unit, B
Is a swing sorting unit, and the hulling wind selection unit A has a pair of left and right rubber rolls axle mounted on the upper part, and forms a wind selection unit b below the rubber rolls a for air-selecting the hulling. The swing sorting part B has a sorting plate c
A sorting device d is provided in multiple stages of about 5 to 6 stages, and a bucket elevator e is provided behind the hulling wind selection unit A to fry the mixed rice, and a storage tank f is provided at an outlet of the bucket elevator e. And is equally distributed to the swing sorting plate c of each stage via the distribution device g. A supply hopper h is provided above the hulling wind selection unit A, and when rice is supplied to the supply hopper h, hulling is performed by a rubber roll a, and hulling that is air-selected by the breeze unit b is blown by a blower i. The hulled material is fried by a bucket elevator e, flows into a storage tank f, and is supplied from a distributing device g to a sorting device d.
In the sorting device d, the rice is separated into paddy rice, mixed rice, and brown rice by rocking, the brown rice is taken out as finished rice in the finished rice thrower j, and the mixed rice is returned to the bucket elevator e and re-sorted, Is returned to the supply hopper h and hulled again.

[0003]

SUMMARY OF THE INVENTION The above-mentioned known Japanese Patent Publication No. Sho 6
The automatic control of the hulling device described in Japanese Unexamined Patent Publication No. 3-15026 discloses a device in which the joining is known by comparison with the no-load current value of the main motor, and then the device is opened by 1 mm with a timer to make initial settings. Since the accurate state cannot be known only by comparison with the no-load current value, there is a problem that the roll is opened in the normal hulling state. Further, the known one described in Japanese Patent Application Laid-Open No. 58-114742 also has a problem that the roll is opened even though the rice is in a normal hulling state.

[0004]

[Object of the invention] Accurate opening of hulling rolls when cutting.

[0005]

Therefore, according to the present invention, the rice crushed into the supply hopper 30 is crushed by a pair of crushing rolls 33 and 34 which are rotated by a belt transmission by a crushing belt 86. The mixed rice of the unpolished rice, which has been sucked and discharged by the paddy discharge blower 3 and is wind-selected, is separated into the unpolished rice, the unpolished rice and the mixed rice by the rocking sorter 9, and the unpolished rice is supplied to the supply hopper 3.
Return to 0 and re-hulling, mixed rice is returned to the rocking sorting plate 9 and re-sorted, brown rice is taken out as finished rice in a hulling sorting device, during hulling work, the average current value Cave for 30 seconds and The comparison reference current value D and the work average current value Eave are measured at intervals of 0.2 seconds, and when the increase in the current value is 0.5 A or more and continues for 30 seconds, the hulling roll 33 is controlled by the roll gap adjusting motor 63. , 34 is an automatic control method in a hulling sorter by belt transmission in which a gap is opened.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. In FIG. 2, reference numeral 1 denotes a hulling unit, 2 denotes a swing sorting unit, and both the hulling unit 1 and the swing sorting unit 2 have a front rectangular box shape. The hulling unit 1 is formed slightly higher than the swinging sorting unit 2, and a hulling waste blower 3 is provided on the left side of the hulling unit 1 side, and finished rice is provided on the right side of the swinging sorting unit 2 side. A lower 4 is provided. A mixed rice bucket elevator 5 is provided behind the hulling unit 1, and a storage tank 6 is provided at a discharge portion of the mixed rice bucket elevator 5.

As shown in FIGS. 3 and 4, a swing sorting device 7 provided in the swing sorting unit 2 has a distributor 8 reaching each stage at an upper portion and several stages stacked at a lower portion thereof. A selection plate 9 group is provided. The selection plate 9 is supported by a swing frame 11 on a frame 10 (FIG. 3), and is formed so as to swing left and right when the cam wheel 12 is rotated by a motor 13. Although the sorting plate 9 has a constant outflow angle in the front-rear direction, the grain distribution angle in the left-right direction is formed so as to be adjustable according to the sorting state.
When the right side is moved up and down around the left shaft attaching portion 16 by the screw rod 15 rotating at 4, the right and left inclination is changed. This adjustment is performed by operating the switch 18 (FIG. 11) while observing the sorting state from the see-through window 17 (FIG. 2). As shown in FIG. 4, the distributing device 8 has a bottom plate 19 formed in a step-like shape so that the grains move to the right by swinging, and the abutting portion in the moving direction includes a sorting plate 9 of each stage. A divided opening 20 is formed.

Each of the sorting plates 9 is low on the front side and high on the rear side and is inclined in the front-rear direction.
And a second partition plate 22 are provided. The right side of the first partition plate 21 is a brown rice discharge unit 23, and a portion between the first partition plate 21 and the second partition plate 22 is a mixed rice discharge unit 24, and the second partition plate 22 is provided. On the further left side is a paddy rice discharging unit 25, as shown in FIG. 4, the first partition plate 21 is a screw rod 27 rotated by a second adjustment motor 26, and the second partition plate 22 is a screw rod rotated by a third adjustment motor 28. 29 is a structure that can freely move in the left-right direction.

Next, the structure of the hulling unit 1 will be described.
The hulling unit 1 formed in the shape of a front box is provided with a supply hopper 30 at the top, and a bottom plate 31 of the supply hopper 30.
The supply port 32 is formed so as to be lower toward the right swing sorting unit 2 side, and the supply port 32 is formed at a position shifted to the right side, and a pair of hulling rolls 33, 34 is provided below the supply port 32. Right hulling roll 34 of low height among hulling rolls 33 and 34
Is fixed by rotating with a fixed roll. The hulling roll 33 on the left side, which is high, is a movable roll, and is provided so as to be freely movable toward and away from the fixed roll.

At the lower position of the hulling rolls 33 and 34, there is provided a wind selection path 35 whose left side is higher, and at the lower left side of the wind selection path 35 a paddy wheel 36 having an impeller 36 whose axis is in the front-rear direction. A discharge blower 3 is provided. Reference numeral 37 denotes an inclined bottom plate of the wind selection path 35, and a mixed rice receiving gutter 38 is provided at the right end of the inclined bottom plate 37.
Is provided on the mixed rice receiving gutter 38, and a conveyor 39 for conveying the mixed rice backward is provided. The discharge portion of the conveyor 39 is connected to the lower end of the mixed rice bucket elevator 5.
Reference numeral 40 denotes a paddy gutter trough reaching the impeller 36, a second trough 41 is provided between the mixed rice trough 38 and the paddy gutter trough 40, and a second conveyor is provided on the second trough 41. 42 are provided,
The second conveyor 43 has a second slower 43 attached thereto.

The second thrower 43 is connected to a return paddy trough 44 provided above the mixed rice trough 38. A switching valve 46 is provided in the middle of the jumping cylinder 45 as shown in FIG. When the switching valve 46 is switched to the position indicated by the solid line, the second product is taken out of the machine via the takeoff gutter 47.

A brown rice outlet 48, a mixed rice outlet 49, and a paddy rice outlet 50 are provided below the sorting plate 9 of the swinging sorting unit 2 on the discharge side, and the brown rice outlet 48 and the mixed rice outlet 50 are provided. 4
9 has a finished rice spiral 51 and a mixed rice spiral 5 in the horizontal direction.
2, the finished rice spiral 51 on the right side is connected to the finished rice slower 4 having the impeller 53, and the mixed rice spiral 52
Are connected so as to face the mixed rice gutter 38. The paddy rice outlet 50 is connected so as to face the return paddy trough 44, and the returned paddy collected in the return paddy trough 44 is returned to the supply hopper 30 by the return slotter 54 and reprocessed. 58 is a caster, 59 is an operation handle.

In FIG. 2, reference numeral 60 denotes a storage tank 6.
Inspection windows provided on both front and rear sides of the rice pad.

FIG. 7 shows the supply hopper 30 and the hulling roll 3
It is an example of the enlarged view of 3 and 34, the return chamber 61 is formed in the side part of the supply hopper 30, and the switching valve 62 is provided between the supply hopper 30 and the return chamber 61, and the switching valve 62 is one side. When switched, grains are supplied from the supply hopper 30,
When the switching valve 62 is switched to the other side, the grains are supplied from the return chamber 61. A screw 65 that is rotated by a roll gap adjusting motor 63 is screwed into a top 65 provided on a support arm 66 of the hulling roll 33 whose lower end is axially fixed, and the roll gap adjusting motor 63 is rotated forward and reverse. The roll gap is adjusted.

FIG. 8 is a cross-sectional view of the hulling unit 1. The hulling chamber 67 having the hulling rolls 33 and 34 is provided at the uppermost part of the hulling unit 1. A wind selection chamber 68 is formed in the lower part of 67, and the supply hopper 30, the hulling chamber 67, and the wind selection chamber 68 are surrounded by a rear wall 72 and a front wall 73 to form a substantially square hulling unit 1. A hulling drive chamber 69 between the hulling chamber 67 and the rear wall 72, a conduction chamber 71 between the wind selection chamber 68 and the rear wall 72,
A return device room 7 is provided between the wind selection room 68 and the front wall 73.
0 is formed. Reference numeral 78 denotes a supply shutter, and 79 denotes a supply shutter detection switch that is turned on when the supply shutter 78 is opened.

FIG. 12 shows a control switch panel 81. Reference numeral 75 denotes an operation switch for the main motor 13, reference numeral 76 denotes a stop switch, and reference numeral 77 denotes a fine rotation of the roll gap adjusting motor 63 when the "wide" side is pressed. A fine movement switch (inching switch) for increasing the roll gap and pressing the “narrow” side, and 80 is a one-shot type roll gap automatic adjustment switch that is turned on only when pressed. In FIG. 14, 82 is a driving pulley, 83 and 84 are hulling roll pulleys, 85
Is an oscillating cam wheel pulley, 86 is a hulling belt, and 87 is a sorting belt.

Thus, as shown in the control flow of FIG. 9, the operation switch 75 of the main motor 13 is turned on (step 2), and the detection switch 79 detects that the supply hopper 30 (the supply shutter 78) is closed. When the roll gap automatic adjustment switch 80 is manually pressed (step 4) during the operation (step 3), the roll gap adjustment motor 63 is energized in the forward direction for a predetermined time to widen the roll gap (step 5). The hulling rolls 33 and 34 are separated from each other and rotate in a no-load state. At this time, the no-load current value a (moving average value for 3 seconds) of the main motor 13 is measured and the average is stored in the CPU (step 6). 33, 3
4 is reversed in the contact direction (step 7). Then, the hulling rolls 33 gradually approach the hulling rolls 34 and come into contact with each other. When the rolls 33 and 34 come into contact with each other, a load is applied to the main motor 13 and the current value b increases. Therefore, the roll contact can be detected by comparing the no-load current value a and the current value b. In the case of belt transmission, the hulling belt 86 is tensioned and the current value b
Therefore, the roll contact cannot be detected accurately only by comparing the no-load current value a and the current value b.

Therefore, in the present invention, when the current value b near the roll is gradually increasing, the hulling roll 33,
The contact with the hulling rolls 33 and 34 is regarded as contact only when the number of contacts suddenly increases without being regarded as contact with 34. Specifically, after automatically rotating the roll gap adjusting motor 63 in the direction in which the rolls 33 and 34 come into contact with each other in Step 7, the current value b of the main motor 13 is measured (Step 8).
In step 9, the current value b of the main motor 13 in the vicinity of the roll is compared with a value obtained by multiplying the no-load current value a by a predetermined constant (in the present application, 1.15 is used as a constant. Cut the change). In this comparison, when a × 1.15 <b is NO, the process returns to step 6 in FIG. 9 and the no-load current value a serving as a reference for comparison is measured again.
The rolls are further brought closer to each other and then compared with the measured current value b. In step 9, when a × 1.15 <b becomes YES, the roll gap adjusting motor 63 is automatically rotated forward for a predetermined time (for example, about 1.2 seconds) by a timer, and the hulling roll 33 once contacted is The initial setting is completed by widening the interval of about 34 to about 0.8 mm (step 10).

Steps 6 to 9 are performed in parallel at short time intervals (0.2 seconds). That is, once the measurement of the current value a for the first three seconds is started, the measurement for the next three seconds is started 0.2 seconds later without waiting for the result, and the current measurement and comparison are performed one after another in this manner.

Next, the supply shutter 78 of the supply hopper 30 is manually opened (step 11) to start the hulling, and the interval between the hulling rolls 33 and 34 is about 0.8 as described above.
Even if it is initially set to mm, for example, when the rice is strongly dry, the rice is crushed due to the difference in the varieties. Then, looking at the mixed rice which has flown out onto the sorting plate 9 for manual fine adjustment by visual observation, when the hulling is strong, the upper side of the fine movement switch 77 in FIG. The hulling roll interval is widened from the initial setting, and when the hulling is weak, the “narrow” side below the fine movement switch 77 is pressed to narrow the hulling roll interval from the initial setting. In the adjustment by the fine movement switch 77, when pressed once, the roll gap is adjusted by about 0.2 mm.

After the manual fine adjustment is completed as described above, the roll gap automatic adjustment switch 80 is pressed again to automatically adjust the roll gap. Then, it is automatically set as shown in the control flow of FIG. That is, when the roll gap automatic adjustment switch 80 is manually pressed, first, the main motor 13 is turned 90 times at 2 second intervals over 3 minutes.
Is measured, and the initial maximum current value Cmax for 3 minutes is measured.
And an initial minimum current value Cmin and an initial average current value Cave are obtained (step 15). At this time, the initial average current value Cave
In the relationship between the initial maximum current value Cmax and the initial minimum current value Cmin, when the difference between the obtained initial maximum current value Cmax and the initial minimum current value Cmin exceeds 10% of the initial average current value Cave, the fluctuation occurs. The operation is not yet stable, and the measurement is repeated. This is repeated until the difference between the initial maximum current value Cmax and the initial minimum current value Cmin is within 10% of the initial average current value Cave (step 16). .

Steps 15 and 16 are performed in parallel every two seconds. That is, after starting the measurement for the first three minutes, the measurement for the next three minutes is started two seconds after that, and the current measurement is started one after another in this manner, and the difference between the initial maximum current value Cmax and the initial minimum current value Cmin is obtained. Is within 10% of the initial average current value Cave and the current is stable, then the average current value Ca at that time
ve is set as the comparison reference current value D (step 1).
7).

In the subsequent automatic hulling operation, the current value of the main motor 13 during work is measured for three minutes (180 seconds), and the work maximum current value Emax, work minimum current value Emin, and work average current value are measured. Eave is calculated (step 18), and the difference between the maximum work current value Emax and the minimum work current value Emin is calculated as the work average current value Ea.
The stable work average current value Eave within 10% of ve is compared with the comparison reference current value D (step 20). When the work average current value Eave <comparison reference current value D × 0.95, the roll gap is obtained. The adjusting motor 63 is operated for 0.15 seconds to bring the hulling roll close to 0.1 mm (step 22). Conversely, when the work average current value Eave> the comparison reference current value D × 1.05, the hulling roll is separated by 0.1 mm. And hulling (step 24).
When a mechanical trouble occurs, the work average current value
When Eave becomes 10% or more of the comparison reference current value D,
If this is left as it is, paddy rice will be mixed into the finished rice. Therefore, an abnormality is notified by a buzzer to immediately stop the operation.

FIG. 11 is a flow chart when the paddy is cut while the above operation is continued. At the time of hulling, the roll gap is automatically widened, but even if it is not hulling, a similar phenomenon occurs, so to determine this, measure the current for 30 seconds during work and average it. Find the value [Fm] n (step 2
5) When the average value [Fm] n increases in step 26, that is, when the comparison with [Fm] n-1 becomes YES, step 27
To set [Fm] n-1 as [Fm] φ, set the timer for 30 seconds in step 28, and when YES in step 29,
In step 30, it is compared whether the current increase is larger than 0.5 A. If the answer is YES, power is supplied to the roll gap adjusting motor 63 to increase the roll gap (step 31). In order to assist the separation operation of the roll gap by the roll gap adjusting motor 63, a flow of operating the manual operation switch 77 is set in steps 32 and 33.

[0025]

Next, the operation will be described. (General hulling action) When the main motor 13 is energized and the drive pulley 82 is rotated, the operation is performed via the hulling belt 86 and the sorting belt 87. Supply shutter 78 of hopper 30
Is opened, the rice is hulled by the hulling rolls 33 and 34, the hulled rice is sucked in the air selection path 35 in the air selection chamber 68 and discharged by the hulled rice discharge blower 3, and the mixed rice that has been air-selected is mixed rice receiving. The rice is dropped on the gutter 38, sent back by the conveyor 39, supplied to the lower end of the mixed rice bucket elevator 5, fried, and stored in the storage tank 6.

When the shutter for opening and closing the storage tank 6 is opened as appropriate, the mixed rice is supplied from the storage tank 6 to the distribution device 8 and moves to the dividing port 20 by the vibration of the bottom plate 19 of the distributing device 8. And supplied to the sorting plate 9 of each stage. The sorting plate 9 swings to the left and right by the cam wheel 12 rotated by the motor 13, but since the plate surface of the sorting plate 9 is formed with a large number of swinging projections that can swing to the right in the figure, the specific gravity is large. Heavy brown rice moves to the right in the figure, and light rice with a lower specific gravity moves to the left due to the reaction, and unseparated mixed rice is distributed in the center. The brown rice collected in the brown rice discharging section 23 on the right side falls into the brown rice outlet 48, is transported rightward by the finished rice spiral 51, and is jumped up and taken out by the impeller 53 of the finished rice slower 4.

The sorting state of the sorting plate 9 can be seen through the see-through window 17, but if the grain is too close to the brown rice discharge section 23 side, the switch 18 must be turned off because the right and left inclination is not enough. Operate the first adjusting motor 14 of FIG.
, The screw rod 15 is rotated to raise the right side of the selection plate 9, and in the opposite case, the first adjustment motor 14 is reversed to lower the right side of the selection plate 9. In addition, finished rice slower 4
When a small amount of paddy rice is mixed in the brown rice taken out in step 2, the position of the first partition plate 21 is too close to the left, so that the second adjusting motor 26 is energized to rotate the screw rod 27. Then, the first partition plate 21 is moved to the right.

In the above sorting, the mixed rice dropped from the mixed rice outlet 49 is moved to the left by the mixed rice spiral 52, collected in the mixed rice receiving trough 38, and fried by the mixed rice bucket elevator 5. Further, the paddy rice extracted at the paddy rice outlet 50 is collected in the return paddy trough 44 and supplied to the supply hopper 3 by the return thrower 54.
It is returned to 0 and hulled again.

FIG. 9, FIG. 10 and FIG. 11 show the flow of controlling the gap between the hulling rolls of the present invention in FIG.
Indicates a switch board 81. 9, the operation switch 75 of the main motor 13 is turned on (step 2), and the detection switch 79 detects that the supply hopper 30 is closed (step 3). Is pressed manually (step 4), the roll gap adjusting motor 63 is energized in the forward direction for a predetermined time to widen the roll gap, and the hulling roll 33,
34 rotates under no load. The main motor 13 at this time
Is measured (step 6) and stored in the CPU. Next, in step 7, the main motor 13 is automatically reversed in the direction in which the rolls contact each other. Then, the hulling roll 33 gradually approaches the hulling roll 34,
The hulling belt 86 is slightly tensioned. In the meantime, if the parallel processing is performed at intervals of 0.2 seconds as shown in FIG. 9, the current value b of the main motor 13 gradually increases, but when the increase is gradual, the hulling rolls 33 and 34 do not contact. Hulling roll 3
When the contacts 3 and 34 are in contact, the current value changes abruptly. Then, as in step 9, the current value b of the main motor 13 during reverse rotation is compared with the no-load current value a multiplied by 1.15, and when a × 1.15 <b is NO, FIG.
Returning to step 6 of, the reversal is continued, and a × 1.15 <
When b becomes YES, the timer sets a predetermined time (for example, about 1.
By automatically rotating the roll gap adjusting motor 63 forward only for 2 seconds), the gap between the hulling rolls 33 and 34 once in contact is widened to about 0.8 mm, and the initial setting is completed (Step 1).
0).

Next, the supply shutter 78 of the supply hopper 30 is manually opened (step 11).
Although the hulling is performed at 34, since the interval between the hulling rolls 33 and 34 is initially set to about 0.8 mm as described above, the hulling is performed well when, for example, the rice is strongly dry due to the difference in the varieties. In the case of poorly dried rice, the rice is not hulled much. Then, the mixed rice which has flowed out onto the sorting plate 9 for manual fine adjustment by visual observation, and when the hulling is strong, press the upper part of the fine movement switch 77 in FIG. When the hulling is weaker than the initial setting, the lower part of the fine movement switch 77 is pressed to narrow the hulling roll interval from the initial setting. When the fine movement switch 77 is pressed once, the roll gap is adjusted by about 0.2 mm.

After the manual fine adjustment is completed as described above, the roll gap automatic adjustment switch 80 is pressed again to automatically adjust the roll gap. Then, it is automatically set as shown in the flow of FIG. That is, when the roll gap automatic adjustment switch 80 is manually pressed, first, the current value of the main motor 13 is measured 90 times at intervals of 2 seconds over 3 minutes, and the initial average current value Cave for 3 minutes, An initial maximum current value Cmax and an initial minimum current value Cmin are obtained (step 15). If the difference between the obtained initial maximum current value Cmax and the initial minimum current value Cmin exceeds 10% of the initial average current value Cave (step 16), it is determined that the operation is not yet stable at the beginning of the automatic operation. So, we need to repeat the measurement,
This is repeated until the difference between the initial maximum current value Cmax and the initial minimum current value Cmin is within 10% of the initial average current value Cave.

Steps 15 and 16 are performed in parallel at intervals of 2 seconds. That is, after starting the measurement for the first three minutes, the measurement for the next three minutes is started two seconds after that, and the current measurement is started one after another in this manner, and the difference between the initial maximum current value Cmax and the initial minimum current value Cmin is obtained. Is within 10% of the initial average current value Cave and the current is stable, then the average current value Ca at that time
ve is set as the comparison reference current value D (step 1).
7).

During the subsequent automatic operation, the current value of the working main motor 13 is measured for 3 minutes, and the maximum work current Emax, minimum work current Emin, and average work current Eave are measured.
(Step 18), and compares the work average current value Eave when the difference between the work maximum current value Emax and the work minimum current value Emin is within 10% of the work average current value Eave with the comparison reference current value D (Step 18). 20), when the work average current value Eave <comparison reference current value D × 0.95, the roll gap adjusting motor 63
Is operated for 0.15 seconds to bring the hulling roll close to 0.1 mm (step 22). Conversely, when the work average current value Eave> comparative reference current value D × 1.05, the hulling roll is separated by 0.1 mm (step 24). ). If a mechanical trouble occurs,
When the work average current value Eave becomes 10% or more of the comparison reference current value D, if this is left as it is, paddy rice will be mixed into the finished rice, so that a buzzer is used to take measures immediately to take measures. Notify. The buzzer operates a buzzer OFF switch, when the current value of the main motor 13 is zero, when the supply shutter is closed and the supply shutter detection switch 79 is turned off, or when the roll gap automatic adjustment switch 80 is turned on. Is turned off by either of the above.

FIG. 11 is a flow chart showing a case where paddy cutting occurs during the continuation of the above operation. At the time of hulling, the roll gap is automatically widened, but even if it is not hulling, a similar phenomenon occurs, so to determine this, measure the current for 30 seconds during work and average it. Find the value [Fm] n (step 2
5) When the average value [Fm] n increases in step 26, that is, when the comparison with [Fm] n-1 becomes YES, step 27
To set [Fm] n-1 as [Fm] φ, set the timer for 30 seconds in step 28, and when YES in step 29,
In step 30, it is compared whether the current increase is larger than 0.5 A. If the answer is YES, power is supplied to the roll gap adjusting motor 63 to increase the roll gap (step 31). In order to assist the separation operation of the roll gap by the roll gap adjusting motor 63, a flow of operating the manual operation switch 77 is set in steps 32 and 33.

[0035]

According to the above-mentioned automatic control of the hulling device described in Japanese Patent Publication No. 63-15026, the joining is known by comparing it with the no-load current value of the main motor, and then the timer is opened by 1 mm with a timer. Although the apparatus is used for the initial setting, it is not possible to know the exact state only by comparing the value with the no-load current value of the main motor, and therefore, there is a problem that the roll is opened even in a normal hulling state. Also, as disclosed in Japanese Patent Application Laid-Open No. 58-114.
No. 742 also has a problem in that the roll is opened in a normal hulling state. However, the present invention
A pair of hulling rolls 33 and 34 that rotate the hulled rice thrown into the supply hopper 30 by belt transmission by the hulling belt 86.
The rice grain is sucked and discharged by the rice grain discharge blower 3, the mixed rice of the unselected brown rice is separated into the unpolished rice, the unpolished rice and the mixed rice by the rocking sorter 9, and the unpolished rice is supplied by the supply hopper. 30 and re-hulling, the mixed rice is returned to the oscillating sorting plate 9 and re-sorted, and brown rice is taken out as finished rice in the hulling sorting device, during the hulling operation, the average current value Cave for 30 seconds and The comparison reference current value D and the working average current value Eave are measured at intervals of 0.2 seconds, and the increase in the current value is 0.5 A or more and 30
When it continues for 2 seconds, it is not a hulling and a hulling because it is an automatic control method in the hulling sorting device by belt transmission that opens the gap between the hulling rolls 33, 34 by the roll gap adjusting motor 63. The phenomena similar to the hulling are accurately distinguished to prevent the gaps between the hulling rolls 33 and 34 from being unnecessarily opened.

[Brief description of the drawings]

FIG. 1 is a front view of a prior example.

FIG. 2 is a front view of the present application.

FIG. 3 is a front view of the inside of the swing sorting section of the present application.

FIG. 4 is a vertical sectional front view of the same part.

FIG. 5 is a front view showing a second thrower and a return thrower.

FIG. 6 is a sectional view of a second thrower.

FIG. 7 is a front view of the roll opening / closing device.

FIG. 8 is a vertical sectional side view of the hulling unit.

FIG. 9 is a flow chart of hulling control.

FIG. 10 is a flowchart of a hulling control.

FIG. 11 is a hulling control flow chart.

FIG. 12 is a front view of a switch panel.

FIG. 13 is a current change diagram.

FIG. 14 is a belt transmission diagram.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Rice hulling part, 2 ... Oscillating sorting part, 3 ... Hull waste discharge blower, 4 ... Finished rice slower, 5 ... Mixed rice bucket elevator, 6 ... Storage tank, 7 ... Oscillating sorting device, 8 ... Distributing device, 9 ... sorting plate, 10 ... underframe, 11 ... swinging support rod, 12 ...
Cam wheel, 13: main motor, 14: first adjusting motor, 15
... Screw rod, 16 ... Shaft attachment part, 17 ... Transparent window, 18 ... Switch, 19 ... Bottom plate, 20 ... Division opening, 21 ... First partition plate, 2
2 ... second partition plate, 23 ... brown rice discharge section, 24 ... mixed rice discharge section, 25 ... paddy rice discharge section, 26 ... second adjustment motor, 27 ...
Screw rod, 28 ... Third adjusting motor, 29 ... Screw rod, 30 ...
Supply hopper, 31 bottom plate, 32 supply port, 33 hulling roll, 34 hulling roll, 35 wind selection path, 36 impeller, 37 slanted bottom plate, 38 mixed rice gutter, 39 conveyor , 40 ... paddy gutter trough, 41 ... 2nd trough, 42 ... 2nd conveyor, 43 ... 2nd thrower, 44 ... return paddy trough, 45
... jumping cylinder, 46 ... switching valve, 47 ... extraction gutter, 48 ... brown rice outlet, 49 ... mixed rice outlet, 50 ... paddy rice outlet, 51 ...
Finished rice spiral, 52: mixed rice spiral, 53: impeller, 54: return thrower, 58: caster, 59: operation handle,
Reference numeral 60: inspection window, 61: return chamber, 62: switching valve, 63: roll gap adjusting motor, 64: screw rod, 65: frame, 66 ...
Support arm, 67: hulling room, 68: wind selection room, 69: hulling drive room, 70: return device room, 71: conduction room, 72: rear wall, 7
3 front wall, 75 operation switch, 76 stop switch,
77: fine movement switch, 78: supply shutter, 79: supply shutter detection switch, 80: roll gap automatic adjustment switch, 81: control switch board, 82: drive pulley, 83, 84: hulling roll pulley, 85: swing Cam wheel pulley, 86 ... Hulling belt, 87 ... Selection belt.

Claims (1)

[Claims] 1. A rice paddle fed into a supply hopper 30 is padded by a pair of paddy rolls 33 and 34 which are rotated by a belt transmission by a padding belt 86, and paddy rice is suctioned and discharged by a paddy rice discharge blower 3. The mixed rice of the wind-selected paddy brown rice is separated into the paddy rice, the brown rice and the mixed rice by the oscillating sorting plate 9, the paddy rice is returned to the supply hopper 30 and re-hulled, and the mixed rice is crushed by the oscillating sorting plate 9. In the hulling sorter that takes out brown rice as finished rice in the hulling operation, the average current value Cave for 30 seconds, the comparison reference current value D, and the work average current value Eave
Is measured at intervals of 0.2 seconds, and the increase in the current value is 0.5 A
An automatic control method in the hulling sorter by belt transmission in which the gap between the hulling rolls 33 and 34 is opened by the roll gap adjusting motor 63 when the above is continued for 30 seconds.