JP2563321B2 - Control device in grain sorter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a hulling / sorting machine that removes paddy with a stripping mechanism, and then selects and extracts only brown rice from the stripped down-polished rice. 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.

This rotary sorting mechanism is designed to remove the flow of the sliding 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 falls 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.
By using the fact that the paddy among the scrapped rice falls from a height lower than the brown rice even if it is fitted in the recess, the brown rice falling from a high position is received by the brown rice gutter and taken out. However, in this case, the height of brown rice and paddy lifted by the sorting cylinder is low when the particle size is large, and is high when the particle size is small, and when the water content is low, it is low and when the water content is high. Since it tends to increase, if the rotation speed of the selection cylinder is kept constant, the amount of brown rice that enters the brown rice gutter decreases and the ability to select brown rice decreases, or the amount of paddy that enters the brown rice gutter. As a result, the accuracy of sorting brown rice decreases.

Therefore, Japanese Patent Laid-Open No. 63-39670 discloses a prior art.
Providing an in-body amount sensor for detecting the amount of scraped rice in the selection drum, and detecting the jumping state of the brown rice into the brown rice trough, on the rear side plate of the brown rice trough, in the vertical direction as appropriate. A plurality of separated grain detection sensors are provided, and a control circuit for comparing the amount of slid rice with the proper in-body amount is provided, and the amount of slid rice and the appropriate in-body amount are compared, and the grain detection is performed. It is proposed that the rotational speed of the rotary selection cylinder be increased or decreased according to the output of the sensor.

And in the above-mentioned prior art, the range in which the mainstream of the grain mainly hits one of the plurality of grain detection sensors,
Set in the number of divisions (levels) corresponding to multiple grain detection sensors, and in the initial state of work of hull sorting, etc., as a control when the amount of slid rice in the rotary sorting cylinder is small, When the amount of scraped rice is smaller than the amount of scraped rice, it is proposed to control the rotation speed of the rotary selection cylinder to decelerate so that a large amount of brown rice hits the grain detection sensor near the bottom of the back plate in the brown rice gutter. .

[Problems to be solved by the invention]

However, if a large number of the above-mentioned divisions are set and a fine sorting work is performed like the initial state of the sorting work start, a large number of grain detection sensors must be installed, resulting in high manufacturing cost. In addition, as a result of the adjacent distance between the grain detection sensors becoming shorter, the probability that the mainstream of the grain hits a plurality of adjacent grain detection sensors becomes high, and it becomes difficult to specify a predetermined range, so rather the selection accuracy There is a problem that

In addition, as in the initial state when the sorting work is started, the in-body amount is 0
When the rate of change in time and the rate of change in quantity from the time to the predetermined proper in-body amount are large, as in the prior art,
There is also a problem that it is not possible to follow the rapid change and perform control with good sorting accuracy simply by comparing the detected in-body amount with the appropriate in-body amount.

The present invention has been made to solve these problems, and the sorting accuracy of grains decreases when the amount of scraped rice in the sorting cylinder is small, as in the initial state when the sorting operation is started. The purpose is to prevent

[Means for solving problems]

In order to achieve this object, the control device in the grain sorting machine of the present invention is provided with a removing mechanism and a brown rice gutter in a sideways rotary type sorting cylinder having a large number of recesses formed on its inner peripheral surface. In a paddy sorting machine comprising a rotary type sorting mechanism and a speed changing means for increasing / decreasing the rotation speed of the sorting cylinder, in the sorting cylinder, for detecting the amount of fallen rice in the sorting cylinder. While the in-body quantity sensor is installed, flying grains are placed on the rear side plate located on the opposite side of the scraping rice scraping side in the selecting cylinder from the left and right side plates of the brown rice gutter in the selecting cylinder. A grain detection level setting device which is provided with a plurality of grain detection sensors that are sensed at different intervals in the vertical direction, is associated with the grain detection sensors, and can be set in a level zone of a number larger than the number of the grain detection sensors. Set the target level in advance and detect it with the in-body volume sensor. The level zone is determined according to the amount of the scraped rice in the sorting cylinder obtained from the determined value, and when the level zone is a zone lower than the target level, the preset target is set. The value of the level is changed to the lower side, and the rotation speed of the sorting cylinder is controlled to increase or decrease so that the flying target grains hit the changed target level. When the number is extremely small, a means for controlling the rotation speed of the sorting cylinder to decelerate is provided.

[Functions and effects of the invention]

In this way, among the left and right side plates of the brown rice gutter in the sorting cylinder, the rear side plate located on the side opposite to the scraping rice scraping side in the sorting cylinder has a plurality of grains for detecting flying grains. The grain detection sensors are provided in the vertical direction at appropriate intervals, are associated with the grain detection sensors, and can be set in advance in a target zone with a grain detection level setting device that can be set in a level zone of a number larger than the number of the grain detection sensors. Is set and the level zone is determined according to the amount of the amount of slid rice in the sorting cylinder (amount in the body) obtained from the value detected by the in-body sensor, the level sensor is If it is configured that the number of installations does not need to be too large and the target level is set by the grain detection level setting device associated with the grain detection sensor, the grains supplied to the sorting cylinder are Of grain to be selected, such as S The amount of grain entering flew to brown rice 受樋, i.e. the target level so that the amount of grain to be sorted is the optimum value can be arbitrarily changed according to.

Then, the control means of the present invention automatically executes the determination of the level zone according to the amount of the amount of slid rice in the sorting cylinder obtained from the value detected by the in-body sensor. .

Therefore, even when the temporal change rate and the quantitative change rate from the in-body amount becoming 0 to the predetermined proper in-body amount are large like in the initial state of the start of the sorting work, the in-body unit that increases and decreases every minute. The determined level zone also moves according to the amount.

When the level zone determined in this way is a zone lower than the target level, the value of the preset target level is changed to the lower side, and the grains that fly and repeat to the changed target level. Since the rotation speed of the sorting cylinder is controlled to increase or decrease so as to hit a large number of particles, it is possible to rapidly improve the sorting accuracy in the initial state when the sorting operation is started.

Also, when the amount in the barrel is large, the grains that jump into the brown rice gutter by the rotation of the sorting barrel are located at a position corresponding to the target level that is not changed, such as the upper side of each grain sensor. Therefore, the number of rotations of the sorting cylinder can be increased / decreased via the speed changing means so that the number of rotations of the sorting cylinder is increased.

Thus, the amount of grains to be selected such as brown rice in the brown rice receiving gutter can be increased according to the amount of the in-body amount.

On the other hand, when the amount in the body is extremely small, the grain control is uncertain or impossible, such that the grain rises in the brown rice gutter along with the brown rice due to the rising phenomenon of the grain.

Therefore, when the amount of scraped rice in the sorting cylinder is extremely small, the means for controlling the rotation speed of the sorting cylinder to be decelerated should be set to a constant low speed in the initial stage of control regardless of the detection by the grain sensor. And a means for controlling the number of rotations of the sorting cylinder so that once the amount of the scraped rice in the sorting cylinder is judged to be a certain amount or more and then becomes extremely small, the target level is changed to a smaller side. It is configured in.

With this configuration, in the initial state of control such as at the start of work, regardless of the setting of the target level, the rotation speed of the sorting cylinder is set without waiting for the determination by the grain detection sensor. By slowing down to an extremely low speed, the grain does not enter the brown rice gutter, so that an appropriate amount of scraped rice can be quickly accumulated in the sorting cylinder, and the time until normal sorting work is started. It can be shortened and the efficiency of sorting work can be improved.

Also, after the amount of in-body has accumulated above a certain level and once the sorting control is started, when the amount of in-body becomes extremely low again (below d1 zone described below), the number of rotations of the sorting cylinder is extremely reduced. That is, the control is redone, the transition time to the normal state takes too long, and it is not a good idea, so the sorting control is continued by changing the target level by the grain detection sensor (to the smaller side). .

Therefore, according to the present invention, when the variation of the amount of scraped rice in the sorting cylinder varies within the normal range, the target level is automatically changed so that the amount of uptake into the brown rice gutter is optimum. At the same time, the rotation speed of the sorting cylinder can be controlled to increase or decrease to match the target level.However, if the initial amount of the sorting cylinder in the sorting control is extremely small, the rotation speed of the sorting cylinder is temporarily reduced to It is possible to quickly collect the scrapped rice and quickly start normal sorting work.

〔Example〕

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. The hulling / sorting machine includes a horizontally long box-shaped wind sorting device 1, a removing mechanism 2 placed on the upper left side of the wind sorting device 1, and the wind sorting device. The rotary sorting mechanism 3 mounted on the right upper surface of the device 1 constitutes the whole.

The above-mentioned removal mechanism 2 includes a case 4 with a paddy supply hopper 5.
And a pair of left and right removing rolls 6 provided in the case 4.
It has and.

The wind selecting device 1 includes a compressed air fan 7 for sucking the atmosphere,
It consists of a dust-exhausting fan 8 and a sliding-rice-rice wind selecting part 9 and a brown-rice-selecting part 10 which are provided between the two fans 7, 8, and the sliding-down rice-wind selecting part 9 is the removing mechanism. The rice husk is wind-sorted from the deciduous rice after the removal, which is located almost directly under 2, and the rice husk removed from the rice husk by the wind selection is the rice sluice gutter 11 with the spiral conveyor 12
Is sent to the rotary sorting mechanism 3 by a bucket conveyor 13. In addition, the brown rice wind selecting unit 10 is for further finishing wind sorting of the brown rice sorted by the rotary sorting mechanism 3, and the finished brown rice after the wind sorting is the brown rice gutter with the spiral conveyor 15.
It is taken out of the machine from 14 by the bucket conveyor 16.

On the other hand, the rotary sorting mechanism 3 is provided with a rotary sorting cylinder 18 which is horizontally installed in a box-shaped case 17 in two upper and lower stages.
18 is rotatably supported by a pair of left and right rollers 19 and 19 protruding from the inner surface of the box-shaped case 17, and these rollers 19 and 19 are shifted from a motor 40 provided in the wind selecting device 1. It is rotationally driven in the direction indicated by arrow A in FIG.

As shown in FIGS. 3 and 4, the speed change means 41 includes a pulley 42 fixed to the drive shaft of the motor 41 and the shaft 1 of the rollers 19, 19.
Belt 4 to be wound around the split pulleys 43, 43 provided on 9a
4,44 and pressing roller 4 for pressing these belts 44,44
The split pulley 43 faces the fixed conical wheel 43a fixedly fixed to the shaft 19a and resists the force of the spring 47 along the shaft 19a. It consists of a slidable movable conical wheel 43b, and the actuator 4
If the pressing force of the pressing roller 45 pressed by 6 is large,
Since the movable conical wheel 43b retreats away from the fixed conical wheel 43a against the force of the spring 47, the diameter of the belt 44 wound around the split pulley 43 is reduced, and the rotation speed of each roller 19 is increased. The drive control of the actuator 46 is performed by the control device 50 described later.

Each of the sorting cylinders 18 has one end farther from the removing mechanism 2 formed on the supply side 18a and the other end closer to the removal mechanism 2 formed on the discharge side 18b, and has brown rice on the inner surface thereof. A large number of recesses 21 each having a size to fit with are formed.

Further, in each of the sorting cylinders 18, a brown rice gutter 22 with a spiral conveyor 23 is provided with both ends thereof supported by the box-shaped case 17, and the left side of the brown rice gutter 22, that is, the sorting. Sliding rice receiving gutters 24 with a spiral conveyor 25 are arranged in parallel in the region of the drum 18 on the scraping side of the sliding rice. The spiral conveyors 23 and 25 in each of the gutters 22 and 24 are simultaneously driven to rotate by a motor 20 having a variable rotation speed.

The scraped rice coming from the bucket conveyor 13 is
A substantially equal amount of water is introduced into both of the sliding rice gutters 24 through the chute 26, and after being sent by the both sliding rice gutters 24, from the supply port 24a at the end thereof, the supply side 18a in both the sorting cylinders 18 On the other hand, the brown rice that has been fed into the brown rice receiving gutters 22 of both the selection cylinders 18 merges with the chute 27 and then flows down to the brown rice wind selecting unit 10.

Further, a plurality of paddy-raising blades 28 are provided on the inner surfaces of the discharge sides 18b of both the sorting cylinders 18, and a paddy-returning chute 29 is provided between the padding mechanism 2 and the paddy-feeding hopper 5. It is constructed such that the paddy scraped by the paddy scraping blade 28 is returned to the paddy supply hopper 5.

A sensor plate 30 for detecting the amount of slid rice in the sorting cylinders 18 is rotatably provided on each of the sorting drums 18, preferably on the supply side 18a.
An in-body quantity sensor 31 for detecting the thickness of the flow of the slid rice in the sorting cylinder 18, that is, the amount of the slid rice in the sorting cylinder 18, is connected by the rotation angle of the sensor plate 30.

The left side of the left and right side plates of the brown rice gutters 22 in both the selection drums 18, that is, the upper end of the front side plate 22a located on the scraping rice scraping side in the selection drums 18 has a finishing adjustment plate 32. Are mounted via a shaft 33 so as to freely swing and rotate in the circumferential direction of the sorting cylinder 18, and both finish adjusting plates 32 are configured to rotate by an actuator 34.

On the other hand, the left side of the left and right side plates of the brown rice gutter 22, that is, the rear side plate 22b located on the side opposite to the scraped rice scraping side in the sorting cylinder 18 approaches the inner surface of the sorting barrel 18. On the upper surface of the rear side plate 22b, a plurality (five in the embodiment) of grain detection sensors SE1, SE2, SE3, SE.
4, SE5 are provided at appropriate intervals of pitch P in the vertical direction.

Each grain detection sensor SE1, SE2, SE3, SE4, SE5, for example, is composed of a piezoelectric element, and these, each grain detection sensor SE1, SE2, SE3, SE4, SE5, and the sensor plate 30. It is arranged at the supply side 18a of the sorting cylinder 18.

Further, reference numeral 50 in the figure is a shift for the sorting cylinder 18 with the signals from the in-body quantity sensor 31, each grain detection sensor SE1, SE2, SE3, SE4, SE5 and the grain detection level setting device 57 as an input. It is a control device of a microcomputer for controlling the amount of advance / retreat of the actuator 46 of the means 41, by extension, the rotational speed of both the sorting cylinders 18, or the turning angle of the finish adjusting plate 32 as required.

The control device 50 comprises a central control circuit 51, a ROM (read only memory) 52, a RAM (random access memory) 53 and an interface 54. The set of grain detection sensors SE1, SE2, SE3, SE4, SE5 for each of the sorting cylinders 18 is connected to the interface 54 from the input multiplexer 55 through the AD converter 56, and which level of the grain detection sensor can be set by the operator. Also connected to the interface 54 is a grain detection level setting device 57 which first sets whether or not to apply a lot of grain (brown rice).

The in-body quantity sensor 31 is connected to the interface 54 from an operational amplifier circuit, so-called OP amplifier 58, through an AD converter 59. The detection result of the amount Q of the scraped rice on the sorting cylinder 18 by the in-body amount sensor 31 is sampled and quantized as will be described later to determine whether it is within a predetermined zone.

Further, the actuator 46 is connected to the interface 54 via the DA converter 60.

Then, when the paddy is supplied to the paddy supply hopper 5 in the padding removal 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.
After removing the rice husks, the rice husks are removed from the fluffed rice wind selection unit 9 immediately below the rice, and then the bucket conveyor 13 and the chute 26.
And the supply side in both sorting cylinders 18 through the scraped rice receiving trough 24
Supplied to 18a.

In this way, the slide-down rice supplied to the supply side 18a in both the sorting cylinders 18 is a state in which the fluidized bed is formed by repeating the flow of being scraped up to a certain height by the rotation of the sorting cylinders 18 and then falling to the bottom surface. Then, it is transferred toward the discharge side 18b.
During this fluid transfer, brown rice in the scraped rice was
It is lifted up to a relatively high position in the state of being fitted to the rice, and the paddy rice falls off from a position lower than the brown rice. The rice gutter 24 will contain brown rice and paddy.

The brown rice that has entered the brown rice receiving gutter 22 merges with the chute 27 and then flows down to the brown rice wind selecting section 10 where it is finished and sorted so that the small rice is removed, and then taken out of the machine by the bucket conveyor 16. Be done.

On the other hand, the brown rice and the paddy that have entered the scraped rice receiving trough 24, together with the scraped rice from the scraped rice wind selecting section 9, return to both the sorting cylinders 18 and are sorted again.

In addition, the scraped rice that moves while flowing in both the selection cylinders 18 toward the discharge side 18b is removed so that the brown rice enters the brown rice gutter 22, so that it almost becomes only paddy as it approaches the discharge side 18b. After being scraped up by the paddy scraping blade 28, it is returned to the paddy supply hopper 5 in the stripping mechanism 2 through the paddy reduction chute 29 to perform the stripping operation again.

Then, at the time of this removal and sorting work, the protruding and retracting amounts of both the actuators 46, and by extension, the rotation speeds of both the sorting cylinders 18, the in-body amount sensor 31 and each grain detection sensor SE1, SE2, SE3, SE.
The signals from 4 and SE5 are used as inputs to be controlled according to the flow chart shown in FIG.

In explaining this control in detail, first, in the input multiplexer 55, grain detection sensors SE1, SE2, SE3, SE4,
The so-called sampling that detects the amount of grains hitting the SE5 per fixed time as an electric signal, and which of the multiple grain detection sensors determines which sensor receives the most grains, and the AD converter At 56, the discrimination result is quantized (leveled) and used as a target level in the later judgment criteria of control.

The grain detection level setting device 57 is set by the operator as an initial value according to the type of grain to be selected, for example, the difference between rice and wheat, and the grain to which many grains hit Set as the target level corresponding to the location of the sensor. Therefore, the target level or the level as a quantized value of the result detected by the grain detection sensor does not match the number of grain detection sensors, and, for example,
It should be understood that the range detected by the five grain detection sensors is divided into 10 levels, and is quantified so as to be suitable for programming in the central control circuit 51 and digital analysis.

In step 1 following the start, the flag Z = 0 is set in order to execute the following control.

This flag Z is used for the determination of branching during the control described later, and the flag Z has a certain amount Q in the body once or more (for example, d2 zone or more described later), and the sorting control by the grain detection sensor. Is performed, and becomes 0 otherwise.

In step S2, the operator sets the target level (SSN) by the grain detection level setting device 57. For example, this SSN value is 5 which is about half of all levels 10, or 4.5 times or
Match the scale of 3.5 etc.

On the other hand, the in-body amount sensor 31 is connected to the interface 54. Amount Q of scraped rice on the sorting cylinder 18 by the in-body quantity sensor 31
The detection result of is from the operational amplifier circuit, so-called OP amplifier 58.
After passing through the AD converter 59, it is sampled and quantized to determine whether it is in a predetermined zone.

That is, Q1, Q2, Q3, and Q4 are appropriately set from the smaller side to the larger side of the amount of scraped rice in the sorting cylinder 18, and the actual amount of scraped rice (in-body amount) Q is 0 to Q1. Range up to 0 ≦
When Q <Q1, d1 zone, Q1 ≦ Q <Q2 range is d2 zone, Q2 ≦ Q <Q3 range is d3 zone, Q3 ≦ Q <Q4 range
Divide into 4 zones such as d4 zone.

Then, in step S3, the in-body quantity Q in the selection cylinder 18
Is read, and in the subroutine (not shown)
Is compared with Q1, Q2, and Q3, respectively, to determine which of the d1 zone to the d4 zone the in-body volume belongs to.

Next, at step 4, it is judged whether or not the in-body amount Q is equal to or less than the d1 zone, and when yes, the state is considerably small.

There are two ways of controlling the rotation speed of the sorting cylinder in the state where the amount in the cylinder is considerably small. When the above-mentioned flag Z = 0, it means that the control by the grain detection sensor has never been performed (the so-called work is just started and the control is almost started).

At this time, the determination in step 5 as to whether or not the flag Z = 1 is no, and the amount of protrusion of the actuator 46 is determined in step 6 without waiting for the determination by the grain detection sensor because the amount in the body is considerably small. Is set to b1, and an instruction to increase the value of b1 to minimize the number of rotations of the selection cylinder 18 is executed for an appropriate time, and is returned to. By executing this command, the scraped rice can be stored in the sorting cylinder 18.

When the flag Z = 1 in step 5, that is, when yes, the control by the grain detection sensor has been performed once (probably immediately before), so the rotation speed of the sensor is reduced at once as described above. Since it is not a good idea to do so, in step 7, the target level SSN value is greatly shifted so that many of the plurality of grain detection sensors hit the lower sensor of the side plate 22b. . At this time, SSN = SSN-a1 and, for example, the value of a1 = 1.5.

If the in-body volume is equal to or larger than the d1 zone in step 4, that is, no, in step 8, the flag Z is set to 1, and then
In step 9, it is judged whether or not the in-body amount Q is less than or equal to the d2 zone. When the result is yes, the in-body amount Q is larger than the d1 zone and is within the range of the d2 zone. In this case, in step 10, the value of SSN, which is the target level, is shifted by a medium degree. At this time, SSN = SSN-a2, and for example, the value of a2-1.0 is set.

When the result in step 9 is no, that is, when the in-body quantity Q is in a range larger than the d2 zone, it is further determined in step 11 whether or not it is below the d3 zone.

Then, when the answer is yes, the in-body quantity Q is larger than the d2 zone and is within the range of the d3 zone. At this time, in step 12, the target level SSN value is shifted by a small amount. At this time, SSN = SSN-a3, and for example, the value of a3 = 0.5.

On the other hand, when the answer is no in step 11, the in-body quantity Q is in the d4 zone, which is a range larger than the d3 zone, so the target level is held at the SSN value initially set.

In this way, the target that is the standard of which of the plurality of grain detection sensors the grain that is lifted by the rotation of the selection cylinder 18 and jumps toward the side plate 22b of the brown rice gutter 22 is detected. By changing the level SSN according to the amount of the in-body quantity Q, the ratio of control for increasing or decreasing the rotational speed of the sorting cylinder 18 afterwards also changes.

As described above, after the target level setting and change control are completed, in step 13, the grains that are actually lifted by the rotation of the sorting cylinder 18 and jumped toward the side plate 22b of the brown rice gutter 22 are the plurality of grains. Which of the grain detection sensors is detected most is detected, and the detection level value SN
Read.

In step 14, it is determined whether the detection level value SN is less than or equal to a predetermined output value, and if there is no output value, that is,
When it is no, it means that the amount Q of the brown rice to be taken into the brown rice gutter 22 is very small because the amount of the in-body Q accumulated in the sorting barrel 18 is extremely small.
Set the protrusion amount of the actuator 46 to b2. As a result, the number of rotations of the sorting cylinder 18 is greatly reduced so that the scraped rice is accumulated in the sorting cylinder 18 by a predetermined amount.

It should be noted that the execution of the instruction of step 15 is an extreme abnormal state or the control is in an initial stage.
Return to and set the flag Z = 0.

When the detection level value SN is equal to or larger than the predetermined output value in step 14, the determination is yes, and in step 16, the detection level value SN is compared with the target level SSN.

Then, when determining that SSN ≈ SN, yes
Therefore, the projection amount of the actuator 46 is maintained as it is, and the sorting cylinder 18
The rotation speed of is also kept as it is, and the process returns to the original step 1.

If there is a constant difference instead of the state of SSN ≈ SN, the result is no, and in step 17, according to the value of SSN-SN, (SSN-
Based on the value of (SN) × α, the amount of appearance of the actuator 46 is determined, and the rotation speed of the selection cylinder 18 is accelerated or decelerated accordingly.

By performing control through this routine at an appropriate time interval, when the amount of scraped rice in the selection cylinder 18 is large, the brown rice that enters the brown rice gutter 22 by the rotation of the selection cylinder 18 is a grain detection sensor. Among the SE1, SE2, SE3, SE4, SE5, the rotation speed of the sorting cylinder 18 is controlled to increase while the target level is set so that it hits most of the grain detection sensors located near the upper part, while sorting When the amount of scraped rice in the barrel 18 is small, the brown rice that enters the brown rice gutter 22 by the rotation of the sorting barrel 18 is located near the bottom of each grain detection sensor SE1, SE2, SE3, SE4, SE5. The rotation speed of the sorting cylinder 18 can be controlled to be decelerated while the target level is set so as to hit many grain detection sensors.

In the shift control of the sorting cylinder 18, the shift means
When not only the shift control by the actuator 46 in 41 but also the axial movement of one movable pulley of the split pulley 43 is executed by a pulse motor or the like, the shift control can be finely performed even with a digital signal. Further, the motor 40 may be configured as a variable speed control motor, and control may be performed so as to directly increase or decrease the rotation speed of the motor.

Further, in addition to the speed-up control of the sorting cylinder 18, the finishing adjustment plate 32 is rotated downward as shown by the alternate long and short dash line in FIG. By turning upward as shown by the chain double-dashed line in FIG.
The amount of brown rice that can enter can be increased, but when the amount of scraped rice in the sorting cylinder is small, the brown rice gutter 22
It is possible to further reduce the paddy entering the
Needless to say, the number of each grain detection sensor is not limited to five in the above-mentioned embodiment, and the grain detection sensors SE1, SE2, SE3, SE4, SE5 arranged in the vertical direction are left and right zigzag on the upper surface of the side plate 22b. By arranging the grains in the shape, it is possible to increase the number of grain detecting sensors under the condition that the pitch P between the grain detecting sensors is narrowed.

Furthermore, as shown in FIG. 5, grain detection sensors SE1, SE2,
SE3, SE4, SE5, ... are not arranged on the upper surface of the side plate 22b with a gentle inclination angle, but the grain detection sensors are arranged vertically on the upper surface of the support plate 61 which is set almost vertically through the bracket 62. By providing it, it is possible to prevent the so-called double detection error that the grain hitting the upper position bounces and hits the grain detecting sensor in the lower position again.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a hulling / sorting machine, and FIG. 2 is a II of FIG. 1 including a control circuit diagram of a controller according to an embodiment of the present invention.
-II enlarged cross-sectional view, FIG. 3 is a plan view of the shifting means, FIG. 4 is a side view, FIG. 5 is a side view showing another embodiment of the arrangement of the grain detection sensor, and FIG. It is a figure which shows the flow sheet of. 1 ... Wind speed device, 2 ... Removing mechanism, 3 ... Rotary sorting mechanism, 18 ... Sorting cylinder, 20 ... Motor, 21 ... Recess, 22 ...
Brown rice gutter, 22b …… Back plate of brown rice gutter, 30 …… Sensor plate, 31 …… Body amount sensor, 32 …… Finishing adjustment plate, 40 …… Motor, 41 …… Transmission means, 42 …… Pulley , 43 …… Split pulley, 44 …… Belt, 45 …… Presser roller, 46 …… Actuator, SE1, SE2, SE3, SE4, SE5 …… Grain detection sensor, 50…
… Controller, 51… Central control circuit.

Claims (2)

(57) [Claims] 1. A rotation-type sorting mechanism comprising a take-off mechanism and a rotary-type sorting mechanism having a brown rice gutter provided in a horizontal rotary-type sorting cylinder having a large number of recesses formed on its inner peripheral surface. In a hulled rice sorting machine equipped with a speed changing means for increasing / decreasing speed, an in-body quantity sensor for detecting the amount of slid rice in the sorting cylinder is provided in the sorting cylinder, Among the left and right side plates of the gutter, the rear side plate located on the side opposite to the scraped rice scraping side in the sorting cylinder has a plurality of grain detection sensors for detecting flying grains vertically as appropriate. A target level is set in advance by a grain detection level setting device that is provided separately, is associated with the grain detection sensor, and can be set in a level zone of a segment larger than the number of the grain detection sensors, and Amount of rice in the sorting cylinder obtained from the values detected by The level zone is determined according to the amount, and when the level zone is a zone lower than the target level, the value of the preset target level is changed to the lower side and the changed target level is set. A means for controlling the rotation speed of the sorting cylinder to increase or decrease so that the flying grains hit a lot, and to decelerate the rotation speed of the sorting cylinder when the amount of the scraped rice in the sorting cylinder is extremely small. A control device for a grain sorter characterized by being provided with. 2. A means for controlling the rotation speed of the sorting cylinder to be decelerated when the amount of the scraped rice in the sorting cylinder is extremely small, in the initial stage of control regardless of the detection by the grain detecting sensor. A means for controlling the number of rotations of the sorting cylinder so that the speed becomes low, and once the amount of the scraped rice in the sorting cylinder is judged to be above a certain level and then becomes extremely small, the target level is changed to a smaller side. The control device in the grain sorter according to claim 1, wherein the control device is configured by: