JPH0628233Y2 - Control device in grain sorter - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] In the present invention, only unpolished rice is selected and extracted from the deciduous rice (mixture of unhulled rice and unpolished rice) after dehulling the unhulled rice with a depowing mechanism The present invention relates to a grain selection control device.

[Conventional technology]

In order to select brown rice from the scrapped rice after removing it, an oscillating type sorting mechanism was often used. However, this oscillating type sorting mechanism is large and generates a lot of vibration and noise. Therefore, recently, it has been carried out to use a rotary sorting mechanism in which a brown rice gutter is provided in a horizontal rotary sorting barrel having a large number of recesses formed on the inner peripheral surface. There is.

Then, this rotary type sorting mechanism removes the flow of the scraped rice (mixture of paddy and brown rice) supplied to the supply side in the sorting cylinder, which is scraped up to a certain height by the rotation of the sorting cylinder and then drops to the bottom surface. Repeatedly, while moving to the discharge side while forming a fluidized bed, brown rice among the scraped rice was lifted to a high position while being fitted in the recess, and then dropped, and the paddy among the scraped rice was depressed. By utilizing the motion of falling from a height position lower than the brown rice even when it is fitted in a place, the brown rice falling from a high position is received by the brown rice gutter and taken out.

In this type of rotary sorting mechanism, when the number of rotations of the sorting cylinder is large, brown rice that is fried and flies to the higher position is
A large amount of brown rice flies and arrives at a high position on the side plate on the opposite side of the side plate of the brown rice receiving trough in the sorting cylinder opposite to the side where the sorting cylinder scrapes down the scraped rice. In this state, since brown rice easily enters the brown rice gutter together with the brown rice, the accuracy of selecting the brown rice is lowered.

On the other hand, if the number of rotations of the selection cylinder is small, brown rice will fly to a lower position on the opposite side plate and drop, so that the amount of brown rice entering the brown rice gutter will decrease and the selection ability of brown rice will decrease. Become.

Therefore, in order to execute the so-called optimum sorting work which maximizes the sorting ability while improving the sorting accuracy, there is disclosed in Japanese Utility Model Laid-Open No. 58-119890 and Japanese Patent Laid-Open No. 59-22.
No. 2281 discloses a rear side plate of the brown rice gutter,
It is proposed to provide a grain detection sensor for detecting the state of the brown rice jumping into the brown rice gutter, and to control the number of rotations of the selection cylinder to increase or decrease so that the grain detection sensor is hit with a large amount of brown rice.

[Problems to be solved by the invention]

By the way, the grain detection sensors are provided at a plurality of positions at appropriate intervals in the vertical direction of the brown rice gutter, and any one of the plurality of grain detection sensors or an intermediate position between two adjacent sensors is provided. When setting the set target and controlling the rotation speed of the sorting cylinder so that the largest number of grains hit the target location, set a certain grain detection sensor as the target, and the sensor will detect the most brown rice. If the control of the rotation speed of the sorting cylinder is executed so as to hit, the following inconvenience occurs.

That is, since the grains that have jumped into the brown rice gutter have variations in the degree of flight, the brown rice gutter enters the brown rice gutter with a certain density distribution over an appropriate range.

Therefore, when the grain detection sensor is provided at a plurality of locations at appropriate intervals in the vertical direction of the brown rice gutter, the temporal variation of the frequency of the grains that jump into the brown rice gutter, and the collision of the grains. Combined with the fluctuation that the density distribution temporally shifts up and down in the brown rice gutter, the detection values of both adjacent grain detection sensors fluctuate alternately in time, so at one time The position where the most grain hits, such as the position where the grain detection sensor hits many grains, the next moment the most grain hits the other grain detection sensor. Since it fluctuates moment by moment, if the rotation speed control of the sorting cylinder is executed based on this detection result,
There is a problem that a kind of hunting phenomenon occurs.

In order to eliminate this hunting phenomenon, it is necessary to dispose a large number of grain detection sensors in a substantially continuous manner in the up-down direction of the brown rice gutter, which causes a problem of increased cost.

The present invention aims to solve these problems.

[Means for solving problems]

In order to achieve this object, the present invention provides a rotary type sorting mechanism having a brown rice gutter inside a horizontal rotary type sorting cylinder having a large number of recesses on its inner peripheral surface, and a rotation speed of the sorting cylinder. In a grain sorter comprising a speed change means for changing, a plurality of grains for detecting the position where the grains flying into the brown rice gutter by the rotation of the sorting cylinder hit the surface of the brown rice gutter. The grain detection sensors are provided at appropriate intervals along the up and down direction of the brown rice gutter, and the speed change means is instructed to change the rotation speed of the sorting cylinder in accordance with the detection result of the grain detection sensor. Providing a plurality of scales at appropriate intervals in the setting device for speed setting, as the rotation speed of the sorting cylinder increases from small to large, the scale position is from the lower grain detection sensor position side in the brown rice gutter. It corresponds to the upper grain detection sensor position side And a region where more flying grains hit the scale position corresponding to the installation position of the grain detection sensor, and two regions where the flying grain more hit regions are adjacent to each other. It is configured such that the scale position corresponding to the midway position in the vertical direction of the grain detection sensor installation position is alternately positioned, and when setting the scale position of the setting device to the scale position corresponding to the midway position,
The average number of rotations of the sorting cylinder that causes more grains to fly to the two adjacent grain detection sensors that sandwich the middle position hits the middle position most. As described above, the control means for controlling the rotation of the sorting cylinder is provided.

[Function and effect of device]

With this configuration, the number of graduations on the setting device for controlling the rotation speed of the sorting cylinder depends on the number of grain detection sensors provided on the brown rice gutter and the distance between two adjacent grain detection sensor positions. Since it is the sum of the number corresponding to the middle position, the number of installed grain detection sensors can be significantly reduced compared to the case where a scale of the setting device is provided corresponding to the location where the grain detection sensors are installed. The cost can be reduced.

Moreover, when controlling so that a large number of grains hit the middle position of the two adjacent grain detection sensors, the largest number of grains should hit the two adjacent grain detection sensors. Detecting the rotation speed of the sorting cylinder when changing the speed changing means, since it corresponds to the scale position as an intermediate position with the average value of the number of rotations, even if there is no grain detection sensor at the intermediate position, The rotation speed (shift position of the shifting means corresponding to this) can be determined, and one scale position is associated with one grain detection sensor and the target grain detection sensor among the grain detection sensors is selected. Compared to automatically controlling the increase / decrease in the rotation speed of the sorting cylinder based on the hit of brown rice, there is no risk of hunting phenomenon, and the eyes as an intermediate position of the two grain detection sensors. Since it can set, a large number of scales than the number of grain detection sensor, and by extension that of having a remarkable effect that it is possible to speed control of the sorting drum with a fine scale short intervals.

〔Example〕

The following describes the embodiments with reference to the drawings.
The whole is configured by a horizontally long box-shaped wind selecting device 1, a removing mechanism 2 placed on the upper left side of the wind selecting device 1, and a rotary sorting mechanism 3 placed on the upper right side of the wind selecting device 1. Has been done.

The removing mechanism 2 includes a case 4 with a paddy supply hopper 5,
The case 4 is provided with a pair of left and right removing rolls 6 provided therein.

The wind separation device 1 includes a compressed air fan 7 for sucking the atmosphere, a dust exhaust fan 8, and a sliding rice wind selecting portion 9 and a brown rice wind selecting portion 10 provided between the two fans 7, 8. The scraped-rice wind selecting section 9 is located just below the removing mechanism 2 and selects the rice husks from the removed rice after removing the husks. The fallen rice is sent from the slide-down rice gutter 11 with the spiral conveyor 12 to the rotary sorting mechanism 3 by the bucket conveyor 13. Further, the brown rice wind selecting unit 10 is for further performing a finishing wind sorting of the brown rice sorted by the rotary sorting mechanism 3, and the finishing brown rice after the wind sorting is a spiral conveyor 15
It is taken out of the machine from the attached brown rice gutter 14 by the bucket conveyor 16.

On the other hand, the rotary sorting mechanism 3 is provided with a rotary sorting cylinder 35 horizontally arranged in the upper and lower two stages inside the box-shaped case 17, and both of the sorting cylinders 35 are left and right protruding from the inner surface of the box-shaped case 17. The rollers 19 and 19 are rotatably supported by a pair of rollers,
In addition, these rollers 19 and 19 are rotationally driven in the direction indicated by arrow A in FIG. 2 from the motor 40 provided in the wind selecting device 1 via the speed changing means 41.

As shown in FIGS. 3 and 4, the speed change means 41 includes a pulley 4 provided on the shaft 19a of the roller 19 in the sorting cylinder 35.
2, a belt 44 wound around a split pulley 43 provided on the drive shaft of the motor 40, and a shift control means 45 for increasing / decreasing the width of the split pulley 43. The split pulley 43 has a shaft 46. Fixed conical wheel 4 fixedly fixed to the
3a and a movable conical wheel 43b slidable along the shaft 46. The movable conical wheel 43b is brought into contact with a position fixing cam 47 loosely fitted on the shaft 46 at an inclined surface so that the side of the movable conical wheel 43b is fixed.
The sliding cam 48, which is loosely fitted to the shaft 46 so as to be pressed to the side,
The drive screw shaft 50 is non-rotatably and slidably fitted only in a nut 52. One end of the nut 52 is attached to the link mechanism 49. The drive screw shaft 50 is driven by a control servomotor 51. While the roller 19 is driven to rotate forward and backward through a pair of gears, the potentiometer 53 causes the nut 52 to move forward and backward, and thus the roller 19 that fluctuates depending on the distance between the movable conical wheel 43b of the split pulley 43 and the fixed conical wheel 43a. The rotation speed can be taken out as a signal.

The drive control of the shift control means 45 is performed by a control device 54 described later
by.

In order to make the rotation speeds of the upper and lower sorting cylinders 35 the same, a pulley having the same diameter is wound between the shaft 19a of the roller 19 for the one sorting cylinder 35 and the shaft 19a of the roller 19 for the other sorting cylinder 35. A hanging belt (not shown) transmits the rotational force.

In both of the sorting cylinders 35, one end farther from the removing mechanism 2 is on the supply side 35a, and the other end near the removing mechanism 2 is on the discharge side 35a.
A large number of recesses 21 are formed in each b, and the inner surface of each of the recesses 21 is large enough to fit brown rice.

Further, in both of the sorting cylinders 35, brown rice gutters 22 with a spiral conveyor 23 are provided with both ends thereof supported by the box-shaped case 17, and the left sides of the brown rice gutters 22, that is, each Sliding rice gutters 24 with a spiral conveyor 25 are arranged in parallel at the scraping rice scraping-up side in the sorting cylinder 35. In addition, the spiral conveyors 23 and 25 in each of the gutters 22 and 24 are the rotation speed variable motor 20.
Are simultaneously driven to rotate.

The scraped rice coming from the bucket conveyor 13 is
Feeding sides 35a in both the sorting cylinders 35 are fed into the both sliding-down rice troughs 24 through the chute 26 in approximately equal amounts, and after being sent by the both-falling rice troughs 24, from the supply ports 24a at the ends thereof. On the other hand, the brown rice that has entered the brown rice gutters 22 of the both selection drums 35 is configured to flow into the brown rice wind selecting unit 10 after joining the shoot 27. A plurality of paddy-raising blades 28 are provided on the inner surface of the discharge side 35b of the body 35, and a paddy-reduction chute 29 is mounted between the paddy-feeding hopper 5 of the removing mechanism 2 and The paddy scraped by the paddy scraping blade 28 is configured to flow back to the paddy supply hopper 5.

A sensor plate 30 for detecting the amount of slid rice in the sorting drums 35 is rotatably provided on each of the sorting drums 35, preferably on the supply side 35a. The in-cylinder amount sensor 31 for detecting the flow thickness of the slid rice in each sorting cylinder 35, that is, the amount of the slid rice in the sorting cylinder 35 (in-body amount) according to the rotation angle of the sensor plate 30. Are connected.

The finishing adjustment plate 32 is provided on the left side of the left and right side plates of the brown rice gutters 22 in both of the selection cylinders 35, that is, at the upper end of the front side plate 22a located on the scraping rice scraping side in each of the selection cylinders. Is attached via a shaft 33 so as to freely swing and rotate in the circumferential direction of each sorting cylinder 35, and both finish adjusting plates 32 are configured to rotate by actuators 34, respectively. .

On the other hand, the rear side plate 22b, which is located on the left side of the left and right side plates of the brown rice gutter 22, that is, on the side opposite to the scraped rice scraping side in each of the sorting cylinders 35, approaches the inner surface of the sorting cylinder. A plurality of (four in the embodiment) grain detecting sensors SE on the upper surface of the rear side plate 22b.
1, SE3, SE5, SE7 are provided at appropriate pitch intervals in the vertical direction. The representative symbol of the grain detection sensor is indicated by SE.

Each grain detection sensor SE1, SE3, SE5, SE
Reference numeral 7 denotes a piezoelectric element, and these grain detection sensors SE1, SE3, SE5, SE7, and the sensor plate 30 are provided on the supply side 35a of each sorting cylinder 35.
It is arranged in the part.

The control device 54 of the microcomputer comprises a central control circuit 55, a ROM (read only memory) 56, a RAM (random access memory) 57 and an interface 58. Grain detection sensor SE for each sorting cylinder 35
The set of 1, SE3, SE5 and SE7 is from the input multiplexer 59 through the AD converter 60 to the interface 5
The interface 5 is also a setting device 61 for changing the set speed, which is connected to the No. 8 and is operated when the operator desires fine adjustment.
Connect to 8.

The in-body quantity sensor 31 is an operational amplifier circuit, a so-called OP.
The amplifier 62 is connected to the interface 58 via the AD converter 63.

Then, the operator adjusts the scale of the setting device 61, and shift control is performed on each of the sorting cylinders 35 in accordance with a flowchart described later so that a target corresponding to the scale is hit most by a grain according to the scale. The amount of movement of the nut 52 of the means 45,
As a result, the rotation speed of the sorting cylinder is controlled.

In addition, grain detection sensors SE1, SE3, SE5, SE
7, the output of the scale of the setting device 61, the output of the in-body amount sensor 31, and the signal from the potentiometer 53 are used as inputs, and the rotation angle of the finish adjusting plate 32 is calculated as necessary from the calculation result of the central control circuit 55. Can be controlled.

Then, when the paddy is fed to the paddy supply hopper 5 in the padding mechanism 2 in the padding removal selection work, the paddy in the paddy supply hopper 5 flows down between the padding rolls 6 and is removed and removed. After the rice husks are removed from the subsequent slid rice in the sludge-rice wind selecting section 9 immediately below the bucket, the bucket conveyor 13 and the chute 2 are removed.
It is supplied to the supply side 35a in both of the sorting cylinders 35 through the 6 and the scraped rice receiving gutter 24.

The slid-down rice thus supplied to the supply side in each of the sorting cylinders 35 is scraped up to a certain height by the rotation of both sorting cylinders 35, and then forms a fluidized bed in which the fluid repeatedly falls to the bottom surface. Then, it is transferred toward the discharge side 35b. In the course of this flow transfer, the brown rice in the scraped rice is lifted to a relatively high position while being fitted in the recess 21, and the paddy among the scrapped rice falls from a position lower than the brown rice. By exercising, only unpolished rice enters the unpolished rice trough 22 and unpolished rice and unhulled rice enters the down-polished rice trough 24.

The brown rice that has entered the brown rice receiving trough 22 flows into the shoot 27 after being merged with the chute 27, where it is finished and sorted so that the small rice is removed, and then the bucket conveyor 1
It is taken out of the machine at 6. On the other hand, the brown rice and the paddy that have entered the scraped rice receiving trough 24 are returned to the inside of both the sorting cylinders 35 together with the scraped rice from the scraped rice wind selecting section 9 to be sorted again.

Further, the slid rice that moves in both sorting cylinders 35 while flowing toward the discharge side 35b is removed so that the brown rice enters the brown rice gutter 22, so that almost all the rice becomes rice as it approaches the discharge side. After being scraped up by the paddy scraping blade 28, it is returned to the paddy supply hopper 5 in the stripping mechanism 2 via the paddy reduction chute 29, and the stripping action is performed again.

Then, during this grain selection operation, the rotation speed of the selection cylinder 35 is automatically controlled as follows.

During the following control, the position of the movable conical wheel 43b of the split pulley 43 (hereinafter referred to as split pulley position) in the speed change means 41 for adjusting the rotation speed of the sorting cylinder 35 is changed by driving the control servomotor 51. The split pulley position V (I) is determined by the output signal of the potentiometer 53. Then, by changing the split pulley position V (I), the speed ratio of the speed change means 41 is changed and the rotational speed of the sorting cylinder 35 can be increased or decreased.

In step S1 to step S4 following the start of the control process in the flowchart of FIG.
Each split pulley position V (I) corresponding to the position of each scale of 1
Initialize the position of.

The scale of the setter 61 in this embodiment is divided into seven scales from 1 to 7 (maximum scale). Therefore,
In step S1, I is set to "1" as the initial value setting of the variable (I) in the following iterative processing,
In step S2, V is set to V as initialization of the split pulley position.
(I) is set to "0", the variable (I) is incrementally changed in step S3, and in step S4 it is repeatedly judged whether or not the maximum value MAX of the scale is MAX = 7. Initialization from positions V (1) to V (7) is complete.

When the initialization of the split pulley position is completed, the scale SV of the setting device 61 set by the operator is next set in step S5.
On the other hand, in step S6, the position of the grain detection sensor SE that is hit by the most grains is detected, and the position detection value KV is read from this grain detection sensor position.

Here, detecting the position of the grain detection sensor SE with the most number of grains hitting means that the number of times the grain collides with the grain detection sensor reaches the predetermined number in the shortest time. It refers to the detection of the grain detection sensor at the selected location.

Further, in the present embodiment, the scale SV of "1",
Grain detection sensor S corresponding to "3", "5", "7"
It is assumed that E1, SE3, SE5, and SE7 are located respectively, and "2" on the scale SV is a grain detection sensor SE1 and SE.
Corresponding to the middle position of 3, the scale SV "4" corresponds to the middle position of the grain detection sensors SE3 and SE5, and the scale SV "6" corresponds to the middle position of the grain detection sensors SE5 and SE7. And Therefore, the value of SV is a positive integer.

In other words, the scale SV is "1", "3", "5",
When set to "7", each grain sensor S
When the number of grains coming to the installation position of E1, SE3, SE5, SE7 becomes the largest, and the scale SV is set to "2", "4", "6", the grain detection will be performed respectively. It flies with respect to the upper and lower midway positions of the installation positions of the sensors SE1 and SE3, the upper and lower midway positions of the installation positions of the grain detection sensors SE3 and SE5, and the upper and lower midway positions of the installation positions of the grain detection sensors SE5 and SE7. This is the state in which the number of coming grains is the largest.

In step S7, it is determined whether the scale SV is an odd number or an even number, and when it is an odd number, it means that any one of the actual grain detection sensors SE1, SE3, SE5, SE7 is frequently hit by the grain. . In step S8, the quantized set value SVT corresponding to the scale SV is replaced, and compared with the position detection value KV of the grain detection sensor, in step S9, a subroutine for controlling the rotation speed of the sorting cylinder (hereinafter, cylinder rotation). After executing the control subroutine), the process returns to the step S5 following the arrow. This cylinder rotation control subroutine is a flowchart shown in FIG. 7, and will be described in detail later.

This quantized set value SVT has consistency so that it can be compared with the position detection value KV detected as the position of the grain detection sensor, and, for example, stepwise according to the position of the scale SV. Takes an integer value that increases to.

When it is determined in step S7 that the scale SV is an even number, the process shifts to that in the flowchart of FIG. In this step P1, the value "SV-1" is substituted into the replacement scale SV1. That is, the result of subtracting 1 from the even-numbered scale SV is set as SV1. For example, when the scale SV is "4", the value of SV1 is "3".

Next, in step P2, it is determined whether or not the value of the split pulley position V (SV1) corresponding to the position of the replacement scale SV1 is larger than "0", and when it is no, that is, V (SV1). When = 0, the automatic control of the rotation speed of the sorting cylinder has not been executed until then, and the split pulley position is “0” (the split pulley position is an arbitrary value from 0 to an appropriate positive number). , Step P
3, the set value ST corresponding to the replacement scale SV1
V is replaced, and the cylinder rotation control subroutine is executed in step P4.

On the other hand, when V (SV1)> 0, the split pulley position V
This is because the value of (I) exists, and is the case where the control of the rotation speed of the sorting cylinder has been executed once.

In this case, the scale S is determined by the determination in step S7.
Since V is an even number, it means that the most grain is hit between the two grain sensing sensors that actually exist,
Although the maximum value cannot be detected, an appropriate detection value can be simultaneously measured by the two adjacent grain detection sensors.

Therefore, by executing the following calculation, the scale corresponding to the middle position of the two grain detection sensor positions is determined and the rotation speed of the sorting cylinder is controlled.

That is, in step P5, the value of "SV + 1" is substituted into the replacement scale SV2. In other words, even value scale SV
The result of adding 1 to 1 is SV2. For example, when the scale SV is "4", the value of SV2 is "5".

Next, in step P6, it is determined whether or not the value of the split pulley position V (SV2) corresponding to the position of the replacement scale SV2 is larger than "0", and when it is no, that is, V (SV1). = 0, the above step P2
As in the above, the automatic control of the rotation speed of the sorting cylinder was not executed until then, and the split pulley position was "0".
Therefore, in step P7, the replacement scale SV
The set value SVT corresponding to 2 is replaced, and the cylinder rotation control subroutine is executed in step P8.

On the other hand, when the value of the split pulley position V (SV2) corresponding to the position of the replacement scale SV2 is larger than "0", that is, when the value is yes, the split pulley position V (SV1 corresponding to the position of the replacement scale SV1. ) Value and V (SV2) value [V (SV1) + V (SV
2)] ÷ 2 is calculated, and the average value is used to set the split pulley position.

When the operator sets the scale to "4" in the above-described embodiment, the replacement scales determined by the grains hitting the grain detection sensors SE3 and SE5 are SV1 = "3", respectively. SV2 = “5”, and the split pulley position on the scale “4” is determined with the split pulley position [V (SV1) + V (SV2)] / 2 corresponding to the intermediate value “4” of these two replacement scales. Let them do it.

By this calculation, when the operator adjusts the scale of the setting device 61 to the scale of the position corresponding to the middle position of the two grain detection sensors, the split pulley position is set so that the largest number of grains hit the middle position. It is changed to control the rotation speed of the sorting cylinder.

The rotation speed control of the sorting cylinder executes the control of the rotation speed of the sorting cylinder based on whether or not there is a grain collision with two grain detection sensors actually existing adjacent to the midway position. be able to. Therefore, it is possible to perform fine control with a grain detection sensor having a number smaller than the number of scales of the setting device 61.

Further, the control at the scale of the midway position is not based on the judgment of which of the two grain detection sensors is hit by the most grain, but the two grain detection sensors adjacent to each other. If the grains collide with each other to some extent frequently, the split pulley position and thus the rotation speed of the sorting cylinder are controlled to increase or decrease so that the largest number of grains hit the midway position, and the rotation speed of the sorting cylinder is controlled accordingly. The frequency at which one grain sensor collides with one grain sensor fluctuates over time. If there is a phenomenon that the other grain detection sensor is hit by the most grain, there is no possibility that a kind of hunting will occur, such as when controlling by adopting the larger one of them. It is made of.

It should be noted that steps R1 to R3 and steps R7 to R8 in the flowchart of the body rotation control subroutine shown in FIG. 7 are a kind of safety circuit.

That is, in the present embodiment, when the scale is set to the maximum position "7", the grain detection sensor SE7 (arranged at the highest position of the rear side plate 22b of the brown rice gutter 22) has the most grains. The rotation speed of the sorting cylinder is controlled so as to hit the grains. However, even if the rotation speed of the sorting cylinder 35 becomes faster, a certain amount of grain collides with the grain detection sensor SE7. When the rotation speed is too fast, it is erroneously determined that the rotation speed is the optimum state even in the overrun state.

If the rotation speed of the sorting cylinder is too fast, the grains continue to rotate while being pressed against the inner peripheral surface of the sorting barrel by the centrifugal force, and the grains in the sorting barrel do not enter the brown rice gutter. There is a problem that it is carried around forever and cannot be sorted, and the grain (brown rice) in the sorting cylinder is rubbed by the inner peripheral surface of the sorting cylinder, and a lot of rice is rubbed against the skin.

Therefore, as a means to avoid this overrun state,
When the maximum scale is set, the grain detection sensor SE5 at a lower position is hit with a lot of grains, so that the split pulley position V (5) to be set is limited by an appropriate amount α so as not to exceed the split pulley position. It is intended to be added.

Therefore, in step R1, it is determined whether or not the set value SVT corresponding to the scale SV or the replacement scale SV1 or SV2 is equal to the maximum value MAX (this maximum value is predetermined according to the maximum scale). When the scale of the setter is set to the maximum (MAX) position (scale "7" in the embodiment), the split pulley position is set to "5" so far as the scale of the setter 61. Since there is a possibility that there is no such possibility, as the learning, the dividing pulley position V (I) is subtracted by 2 from the maximum value MAX, so that the grain that is one step below the grain detecting sensor SE7 corresponding to the position on the maximum scale. The split pulley position V (MAX-2) corresponding to the grain detection sensor SE5 is determined.

Next, at step R2, this split pulley position V (MAX
-2) is larger than "0", and when it is no, as the value of the set value SVT (MA
X-2) is substituted to once learn the split pulley position V (5) corresponding to the grain detection sensor SE5.

After this learning is performed, the control of step R4 and thereafter is executed. When it is determined yes in step R2, the control of step R4 is executed with the set value SVT in step R1.

At step R4, step S8 when the scale SV is an even number, and step P3 when the scale SV is an odd number.
Or, comparing the set value SVT in step P7 or step R1 or step R3 with the position detection value KV of the sensor, KV> SVT, that is, the highest value in the grain detection sensor at a position higher than the set position of the scale. If the grains collide, in step R5, the split pulley position V is set so as to widen the gap between the split pulleys.
(I) is changed and the rotation speed of the selection cylinder 35 is reduced.

When KV = SVT, the most of the grains hit the predetermined height position of the back side plate 22b in the brown rice gutter corresponding to the set scale position, so it is determined that the state is optimum, and the split pulley is determined. The position is kept as it is (invariant).

In the state of KV <SVT, it means that most of the grains hit the lower position than the set target height position in the brown rice gutter, so it is necessary to increase the rotation speed of the sorting cylinder.

However, when the position of the split pulley position V (I) is set to the position of the maximum scale as described above, in order to prevent the overrun of the rotation speed of the sorting cylinder 35, step R7 is performed.
And the split pulley position V (MAX-2) is "0".
When it is not larger (no), that is, when the split pulley position is set below (slow speed) below the grain detection sensor SE5, the current split pulley position remains the same and V (MAX-2) When> 0, step R
8 the current split pulley position V (I) and the V (MA)
X-2) is compared with a value obtained by adding an amount α for changing the split pulley position to the speed increasing side by an appropriate amount, and when the current split pulley position V (I) is smaller than V (MAX-2) + α, There is ample room to change to the speed-increasing side, so the split pulley position is further changed to the speed-increasing side (step R
9).

The current split pulley position V (I) is V (MAX-2) + α
When it is greater than or equal to, the limit is added or prohibited so that the split pulley position is not changed to the speed increasing side.

In addition to the speed increase control of the sorting cylinder 35, the finish adjusting plate 32 is rotated downward as shown by the one-dot chain line in FIG. By turning upward as shown by the chain double-dashed line in the figure, the brown rice gutter 2 can be used in the case where there is a large amount of inside of each sorting cylinder.
The amount of brown rice in 2 can be increased, while the amount of brown rice in the sorting barrel is small 2
It is possible to further reduce the amount of paddy that enters No. 2.

Further, the control of the present invention supplies the removed sludge-free rice to the two sorting cylinders in approximately equal parts, and removes the remaining scraped rice that was not received by the brown rice gutters in each of the sorting cylinders. Is mixed with a lot of paddy), and is returned to the removing mechanism to circulate,
Of the two upper and lower sorting cylinders, a type in which scraped rice that has not been sorted by the upper sorting cylinder is supplied to the lower sorting cylinder to be subjected to the sorting operation again, and further one sorting cylinder It goes without saying that the present invention can also be applied to the type having.

[Brief description of drawings]

FIG. 1 is a vertical front view of a hulling / sorting machine, and FIG. 2 is a II of FIG. 1 including a control circuit diagram of a control device according to an embodiment of the present invention.
-II enlarged cross-sectional view, FIG. 3 is a plan view of the speed change means, FIG. 4 is a side view taken along line IV-IV of FIG. 3, and FIGS. 5, 6 and 7 show the control of the present invention. It is a flowchart. 1 ... wind selection device, 2 ... stripping mechanism, 3 ... rotary sorting mechanism, 35 ... sorting cylinder, 20 ... motor, 21 ... recess,
22 …… Brown rice gutter, 22b …… Back side plate of brown rice gutter, 3
0 …… Sensor plate, 31 …… Body amount sensor, 32 ……
Finishing adjustment plate, 40 ... motor, 41 ... transmission means, 42
...... Pulley, 43 …… Split pulley, 44 …… Belt, 4
5 ... Shift control means, 47 ... Position fixing cam, 48 ...
Sliding cam, 49 ... Link mechanism, SE1, SE3, SE
5, SE7 ... Grain detection sensor, 51 ... Control servomotor, 54 ... Control device, 58 ... Central control circuit, 6
1 ... Setting device.

Claims (1)

[Scope of utility model registration request] 1. A rotary sorting mechanism having a brown rice gutter provided in a horizontally rotating sorting cylinder having a plurality of recesses formed on an inner peripheral surface thereof, and a speed change for changing a rotation speed of the sorting cylinder. In the grain selector comprising means, a plurality of grain detection sensors for detecting the position where the grains flying into the brown rice gutter by the rotation of the sorting cylinder hit the surface of the brown rice gutter. , Provided along the vertical direction of the brown rice gutter at appropriate intervals,
A plurality of scales are provided at appropriate intervals in a speed setting setter for instructing the speed changing means to change the rotation speed of the sorting cylinder in correspondence with the detection result of the grain detection sensor, and the rotation of the sorting cylinder is changed. As the speed increases from small to large, the scale position is set so as to correspond from the lower grain detection sensor position side to the upper grain detection sensor position side in the brown rice gutter, and the flying comes. The area where more grains hit the scale position corresponding to the installation position of the grain detection sensor, and the area where more flying grains hit more adjacent two grain detection sensor installation position in the vertical direction It is configured such that the scale position corresponding to the midway position is alternately located, and when the scale position of the setting device is set to the scale position corresponding to the midway position, two adjacent grains sandwiching the midway position Control means for controlling the rotation of the sorting cylinder so that the largest number of grains hits the midway position at the average value of the number of rotations of the sorting cylinder that causes more grains to fly to the intelligent sensor installation position. A control device for a grain sorter characterized by being provided with.