JPH1147694A - Controller for husking separator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to adjust and set the appropriate number of oscillations and revolutions of a shaking separator. SOLUTION: The distribution data of paddy and unpolished rice is read by a paddy/ unpolished rice discriminating sensor 30 and the angle of transverse inclination of a shaking sepn. plate is read by a sepn. plate inclined movement (position) potentiometer 51. The number of oscillations and revolutions of an oscillation and rotation adjusting motor 60 is read. The paddy/unpolished rice discriminating sensor 30 is then moved to a transverse direction reference position and the number of revolutions of the oscillation and rotation adjusting motor 60 is adjusted to the initial number of oscillations and revolutions with respect to the detected angle of transverse inclination of the shaking sepn. plate. The number of oscillations and revolutions is then adjusted to increase by a prescribed revolution (2 rpm) each at every prescribed time. Whether the detection data of the paddy/unpolished rice discriminating sensor 30 detects the boundary position between the paddy and the unpolished rice or not is decided. When the boundary polishing is not attained, the number of oscillations and revolutions is adjusted to a further higher side. When the boundary position between the paddy and the unpolished rice is detected, the number of oscillations and revolutions is decided to be appropriate and the adjusted to the higher side of the number of oscillations and revolutions is stopped. As a result, the number of oscillations and revolutions of the shaking sepn. plate may be adjusted and set to and at the correct number of revolutions by effectively utilizing the paddy/unpolished rice discriminating sensor 30 of the unpolished rice partition plate position controller.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a control device of a hulling sorter.

[0002]

2. Description of the Related Art A reciprocating brown rice partition plate is provided on the discharge side of a swing sorting plate, and a boundary position between rice and brown rice is detected by a paddy / brown rice discrimination sensor provided on the discharge side of the swing sorting plate. A device for automatically moving and controlling a brown rice partition plate to a partition position related to a detection boundary position is known.

[0003] In addition, a paddy / brown rice discrimination sensor is attached to a predetermined relational position on a brown rice partition plate, and the paddy / brown rice discrimination sensor and the brown rice partition plate are moved integrally by a moving device.
It is also known to detect a boundary position between rice and brown rice by a brown rice discrimination sensor and control a partition position of a brown rice partition plate.

[0004]

According to the present invention, the sorting state of the swing sorting plate is detected by a paddy / brown rice discrimination sensor to control the partitioning of the brown rice partition plate, and the paddy / brown rice discrimination sensor is also effective. The purpose of this is to adjust and set an appropriate swing rotation speed.

[0005]

The present invention employs the following technical means in order to solve the problems of the prior art. That is, the present invention provides a swing sorting unit 3 having a swing sorting plate 15, a brown rice partition plate 18, and a brown rice partition plate movement adjusting means 28 for moving and adjusting the brown rice partition plate 18.
A rice / brown rice discriminating sensor 30 provided on the discharge side of the rocking sorter plate 15 to detect a boundary position between rice and brown rice, and a partition related to the rice / brown rice detection boundary position of the rice / brown rice discrimination sensor 30 Brown rice partition plate control means for moving and adjusting the brown rice partition plate 18 to the position, lateral inclination angle adjusting means for adjusting the lateral inclination angle of the swing sorting plate 15, and detecting the lateral inclination angle of the swing sorting plate 15. Lateral inclination angle detection means, oscillation rotation number adjustment means for adjusting the oscillation rotation number of the oscillation selection plate 15, and oscillation rotation number detection means for detecting the oscillation rotation number of the oscillation selection plate 15; Rocking rotation speed setting means for setting the rocking rotation speed by increasing / decreasing and adjusting the rocking rotation speed of the rocking rotation speed adjusting means and detecting the boundary position of the paddy / brown rice by the paddy / brown rice discrimination sensor 30. This is a configuration of a control device of the hulling sorter.

[0006]

[Function] During the hulling sorting operation, the hulling / brown rice discrimination sensor 30
While moving in the horizontal direction on the discharge side of the rocking sorting plate 15, the distribution boundary position of the rice / brown rice is detected, and the movement of the brown rice partition plate 18 is controlled to a partition position related to the detected boundary position,
Alternatively, while the brown rice partition plate 18 is moved integrally with the paddy / brown rice discrimination sensor 30, the brown rice partition plate 18 controls the partition to take out brown rice outside the partitioning machine.

[0007] Further, the distribution data of the paddy / brown rice is detected by the paddy / brown rice discrimination sensor 30, and the lateral inclination angle of the pivoting selection plate 15 is detected by the lateral inclination angle detecting means. The dynamic rotation speed is detected by the swing rotation speed detection means. Next, the paddy / brown rice discrimination sensor 30 is moved to a predetermined position in the lateral direction, and the swing rotation speed is adjusted to a higher side or a lower side. It is determined whether or not the rotation has been detected, and the swing rotation speed at which the boundary position between the paddy and brown rice is detected is determined as the appropriate swing rotation speed.

[0008]

According to the present invention, as described above, the rice-brown rice discriminating sensor 30 detects the rice-brown rice boundary position of the swing sorting plate 15 and moves and adjusts the brown rice partition plate 18 to the relevant partition position. Although the position of the partition plate is controlled, the rotation speed of the swing selection plate 15 can be appropriately adjusted and set by effectively using the paddy / brown rice discrimination sensor 30, and the sorting can be optimized. it can.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an overall configuration of a hulling sorter will be described with reference to FIG. The rice hulling sorter is a rice hulling unit that performs hulling 1, a rice hulling rice selection unit that wind-selects rice hulled from the rice hulling unit 1, and a mixing after wind selection in a rice hulling rice selection unit 2. It is composed of an oscillating sorter 3, a mixed rice fryer 4, a brown rice fryer 5, and the like for separating and sorting rice into paddy and brown rice.

The hulling unit 1 includes a hulling hopper 6, a hulling roll 7,
The hulling room 8 is provided with an interior such as 7. The sliding rice style selection unit 2 includes a sliding rice style selection box 9, a sliding rice style selection path 10, a pity trough 11, a sliding rice trough 12, a suction fan 13, and a dust tube 1.
4 and so on. Next, the swing sorting unit 3 will be described with reference to FIG. Multi-stage swing sorting plates 15, 15,
, The plate surface is formed with unevenness for sorting, one side in the vertical direction is a high supply side 15a, the other side is a low discharge side 15b, and one side in the horizontal direction is a high swinging side 15c. The opposite side is a lower swinging side 15d, and the swing sorting plate 15 is configured to be slanted both vertically and horizontally, and is swingably reciprocated up and down in the horizontal direction by a swinging device or the like.

The supply side 15a of the swing sorting plate 15
The mixed rice is supplied to the supply port through the mixed rice hopper 24, the distribution supply gutter 16, and the distribution case 17. In the mixed rice, small brown rice with a large specific gravity is distributed in a non-uniform flow on the rocking side 15c in the horizontal direction due to the relationship between the size of the granules, the magnitude of the specific gravity, the magnitude of the friction coefficient, and the like. Paddy is distributed unevenly on the lower side 15d in the horizontal direction, and unmixed mixed rice of unmixed rice and brown rice that is not separated is separated and distributed in the middle part thereof, and the sorted kernels are the brown rice partition plate 18 and the rice partition plate. Partitioned at 19 and taken out.

The separated brown rice is taken out of the machine through a brown rice extraction gutter 20, a brown rice channel 21, and a brown rice milling machine 5, and mixed rice is mixed rice extraction gutter 22, a mixed rice channel 23, and a sliding rice. The falling rice trough 12, the mixed rice fryer 4, the mixed rice hopper 24, the distribution supply gutter 16, and the distribution case 17 are supplied to the rocking sorting plate 15 for re-sorting. The rice is returned to the rice hulling unit 1 through the rice hulling passage 26 and the rice hulling machine 27, and is then hulled again.

Although the drawings are omitted, the mixed rice hopper 2
4 and the paddy supply control valve 37 of the rice hulling unit 1 are interlockingly connected via a linking member such as a link, and when the mixed rice hopper 24 moves down or up due to an increase or decrease in the amount of grain, the paddy supply control valve 37. Is adjusted to the decreasing side or the increasing side, and the supply amount to the hulling rolls 7, 7 is adjusted. As shown in FIG. 2, the brown rice partition plate 18 can be reciprocated from the upper swinging side 15c to the lower swinging side 15d by the brown rice partitioning plate movement adjusting means 28. When the brown rice partitioning plate adjusting motor 29 is rotated forward and backward, The movement is adjusted to the swinging side 15c or the swinging side 15d. When the brown rice partitioning plate 18 moves to the end of the swinging upper side 15c, it is detected by the partitioning plate origin switch (swinging upper side) 33. When the brown rice partitioning plate 18 moves to the end of the lowering side 15d, the partitioning plate originality switch switches. (Swinging side) is detected at 34, and the movement of the brown rice partition plate 18 is stopped individually.

Above the discharge side 15b of the swinging sorting plate 15,
A rice / brown rice discrimination sensor 30 is provided. The rice / brown rice discrimination sensor 30 is configured to be movable in the horizontal direction by a sensor moving means 31 formed of a screw bar, and is configured to reciprocate in the horizontal direction when the sensor adjustment motor 32 is rotated forward and backward. Then, the rice / brown rice discrimination sensor 30 is moved upward 15
When it moves to the end c, the sensor origin switch (upward swing) 3
5 and when it moves to the end of the lower 15d,
The sensor is detected by the sensor origin switch (swinging side) 36, and each is stopped.

The rice / brown rice discrimination sensor 30 is constructed as follows in this embodiment. The light emitting section irradiates electromagnetic waves including the light of the wavelength of the water absorption wavelength and the reference wavelength light not absorbed by the water, receives the amount of light reflected from the grain by the optical filter section, and receives the light of the water absorption wavelength via the optical filter section. (Moisture absorption wavelength light), is converted into a large or small voltage according to the amount of light in the light receiving unit, is input to the control unit 41 built in the CPU, and the reference wavelength light reflected by the optical filter unit is received. (Reference wavelength light), converted into a voltage value, and input to the control unit 41. Thus, the ratio of the two detected voltage values is calculated by the control unit 41, and is compared with a predetermined determination threshold value to determine the type of rice or brown rice. Note that the detection wavelength range is not limited to the above wavelength range.

Next, an input configuration of sensors and switches to a control microcomputer (hereinafter referred to as a control unit) 41 and a connection configuration to an actuator will be described with reference to FIG. The controller 41 includes, via a digital input circuit, a partition plate origin switch (upward swinging) 33, a partition plate origin switch (falling down side) 34, a sensor origin switch (upward swinging) 35, and a sensor origin switch (upward swinging). Side) 36, b
A deployment sensor 42 (which detects a state where the gap between the hulling rolls 7, 7 is widely opened so as not to hulling) is connected.

A grain sensor 43 for detecting the presence or absence of grains in the paddy hopper 6 is connected via a comparison circuit.
The lock-down switch 46, the display changeover switch 47, the swing rotation upper switch 64, and the swing rotation lower switch 65 are connected to each other via a digital input circuit. Further, a load current detection sensor 48 is connected to the control unit 41 via a comparison circuit, and detects an adjustment position of the paddy partition board 19 via an analog input circuit and an A / D conversion circuit. Paddle moving (position) potentiometer 4
9. Movement (position) of a brown rice partition plate for detecting the movement position of the brown rice partition plate 18, a paddle / brown rice discrimination sensor 30, and a sorting plate tilting movement for detecting a horizontal tilt angle of the swinging sorting plate 15 (position) ) Potentiometer 51, movement (position) of paddy supply control valve for detecting the degree of opening of paddy supply control valve 37 of paddy section 1 Potentiometer 52, position of control lever for controlling paddy supply control valve 37 Supply adjustment lever movement (position) potentiometer 53, rice / brown rice discrimination sensor 3 for detecting rice
A paddle / brown rice discrimination sensor movement (position) potentiometer 54 for detecting the 0 movement position is connected to each other.

The control unit 41 has a main motor 55 for driving a hulling sorter, a brown rice partition plate adjusting motor 29, a sensor adjusting motor 32, and a swing sorting plate via an output circuit. Fifteen
Sorting plate inclination adjusting motor 56 for adjusting the horizontal inclination angle of rice, and rice supply adjusting valve adjusting motor for adjusting the opening of rice supply adjusting valve 37
The motor 57, the roll gap adjusting motor 58, the brown rice switching valve adjusting motor 38, and the mixed rice switching valve adjusting motor 40 are connected to each other.

The control unit 41 is connected to a monitor display unit 59 via a display output circuit, and is connected to a swing rotation adjusting motor 60 via a rotation command output circuit. The rotation information of the swing rotation adjusting motor 60 is input to the control unit 41 via a rotation pulse input circuit (oscillation rotation number detecting means). Further, a serial data receiving circuit 61 and a serial data transmitting circuit 62 are connected to the control section 41, and a nonvolatile memory 63 is connected to a memory section of the control section 41.

Next, the control contents of the control section 41 will be described. The partition control of the brown rice partition plate 18 will be described. When the detected peak voltage value is detected by the rice / brown rice discrimination sensor 30,
By comparing the number of detections of the paddy detection peak voltage value within a predetermined time with the control reference value, when the number of detections of the paddy detection peak voltage value is large (or small), the rice / brown rice discrimination sensor 30
The detection operation is continued while moving the rice paddle to the swinging side 15c (or the swinging side 15d) for a predetermined distance, and the position where the number of times of detection of the paddy detection peak voltage value is within the range of the control reference value is set to the position of the rice / brown rice It is determined as a boundary detection position. Next, the partition position of the brown rice partition plate 4 related to the detection boundary position is calculated by a predetermined formula, and the brown rice partition plate 18 is moved to the partition position.

In controlling the automatic partitioning of the brown rice partition plate 18, the rice / brown rice discrimination sensor 30 is attached to the brown rice partition plate 18 at a predetermined position, and the rice / brown rice distinction sensor 30 and the brown rice partition plate 18 are integrated. The configuration may be such that the brown rice partition plate 18 is controlled to move to the partition position while moving in a horizontal direction.

The control of the rotation speed of the swing selection plate 15 will be described with reference to FIG. This control is performed by the swing sorting plate 15.
Utilizing the rice / brown rice discrimination sensor 30 that detects the distribution boundary position of the rice / brown rice, the rocking sorter plate 15 at the start of work
The purpose of this is to automatically set the appropriate swing rotation speed of the motor. When this control is started, the distribution data of the rice / brown rice is read by the rice / brown rice discrimination sensor 30, and the lateral inclination angle of the oscillating selection plate 15 is read by the selection plate inclination movement (position) potentiometer 51. The rotation speed of the rotation control motor 60 is read from the rotation pulse input circuit.

Next, the paddy / brown rice discrimination sensor 30 is moved and adjusted from the swinging upper side to the central reference position in the horizontal direction of the lowering side, and then the initial swinging rotation of the swinging selection plate 15 with respect to the detected lateral inclination angle. The number of rotations (selected from a table created in advance based on experimental data and lower than the number of rotations during normal work) is read out, and the number of rotations of the swing rotation adjustment motor 60 is initialized. Adjust to speed.

Next, the swing rotation speed of the swing rotation adjustment motor 60 is adjusted to a higher side by a command to increase the swing rotation speed by a predetermined rotation speed (for example, 2 rpm), and the rotation time is then increased for a predetermined time (for example, 10 seconds). It is determined whether or not the time has elapsed, and the oscillating rotation speed is increased and adjusted by a predetermined rotation (2 rpm) every time a predetermined time elapses (note that the initial oscillating rotation speed is set higher than the normal rotation speed, and the rotation speed is sequentially increased). May be reached while reaching the appropriate swing rotation speed).

Next, it is determined whether or not the detection data of the rice / brown rice discrimination sensor 30 has detected the boundary between the rice and brown rice. If the boundary position has not been reached, the rice is adjusted to a higher position. When the boundary position is detected, the rotation speed is determined to be an appropriate rotation speed, the adjustment to the higher rotation speed is stopped, and the rotation speed control for maintaining this rotation speed is performed thereafter. As described above, the rice / brown rice discriminating sensor 30 detects the rice / brown rice boundary position of the rocking sorter plate 15 and moves and adjusts the brown rice partition plate 18 to the relevant partition position.
By effectively utilizing the rice / brown rice discrimination sensor 30, the swing rotation speed of the swing sorting plate 15 can be appropriately adjusted and set,
Appropriate selection can be achieved.

Next, the embodiment shown in FIG. 5 will be described. In this embodiment, while the swing rotation speed of the swing sorting plate 15 is appropriately and automatically set, the swing rotation speed is manually adjusted according to the operator's preference to vary the swing sorting state. Is going to be transformed. In the case of performing the sorting operation using the swing sorting plate 15, the sorting operation is performed at a standard swing rotation speed with respect to the lateral inclination angle, although the standard efficiency can be secured. In order to increase the sorting efficiency, the grain supply amount and the side inclination angle may be adjusted. In such a case, it is intended to optimize the manual adjustment of the swing rotation speed.

The control flow will be described with reference to FIG.
When this control is started, the horizontal tilt angle of the swing selection plate 15 is read by the separation plate tilt movement (position) potentiometer 51, and the rotation speed of the swing rotation adjustment motor 60 is input as a rotation pulse. Read from circuit. Next, the proper rotation speed during the normal operation with respect to the detected lateral inclination angle of the swing selection plate 15 is read, and the rotation speed of the swing rotation adjusting motor 60 is adjusted to the proper rotation speed.

Next, the upper limit swing speed and the lower limit swing speed with respect to the detected lateral inclination angle of the swing selection plate 15 (selected and determined from a table prepared in advance based on experimental data). ) Is read, and the upper and lower limit swing rotation speeds are set as the limit rotation speeds. Next, it is determined whether or not the rotation speed reduction adjustment operation by the swing rotation down switch 65 has been performed.
A swing speed reduction command is issued in accordance with the time, and the swing speed is reduced. Next, it is determined whether or not the swing adjustment rotation speed has reached the lower limit swing rotation speed. If the adjustment swing rotation speed has reached the lower limit, further lowering adjustment is stopped.

Next, it is determined whether or not an operation for increasing the rotation speed by the swing rotation switch 64 has been performed. If there is an operation for increasing the rotation speed, a swing rotation speed increase command is issued in the same manner as described above. Adjust the rotation speed. Next, it is determined whether or not the swing adjustment rotation speed has reached the upper limit swing rotation speed. If the adjustment swing rotation speed has reached the upper limit, further raising adjustment is stopped, and thereafter, final adjustment is performed. The swing rotation speed control for maintaining the set swing rotation speed is executed.

Since the control is performed as described above, when the supply amount is to be increased and the efficiency is to be improved, the lateral inclination angle is steeply adjusted and the rotation speed is adjusted to be high, so that the efficiency is improved. While being able to perform sorting work, it is possible to prevent unnecessarily high swing rotation and prevent paddy from being mixed into brown rice.

Next, an embodiment shown in FIG. 6 will be described. In this embodiment, the swing rotation speed of the swing selection plate 15 is appropriately adjusted and set. The control flow will be described with reference to FIG. When this control is started, the sorting plate 1 is swung by the sorting plate tilting movement (position) potentiometer 51.
5 is read, and the swing rotation speed of the swing rotation adjusting motor 60 is read.

Next, the initial swing rotation speed for the detected lateral inclination angle of the swing selection plate 15 (selected from a table created in advance based on experimental data, and based on the rotation speed during normal work). The rotation speed of the swing rotation adjusting motor 60 is adjusted to the initial rotation speed. Then
The upper limit swing speed (selectable and determined from a table prepared based on experimental data in advance) with respect to the detected lateral inclination angle of the swing selection plate 15 is read, and the upper and lower limit swing speed is read. Is set as the limit rotation speed.

Next, the swing rotation speed of the swing rotation adjustment motor 60 is adjusted to a higher side by a command to increase the swing rotation speed by a predetermined rotation speed (for example, 2 rpm), and the rotation speed is adjusted for a predetermined time (for example, 10 seconds). It is determined whether or not it has elapsed, and every time a predetermined time elapses, the swing rotation speed is increased and adjusted by a predetermined rotation (2 rpm), and adjusted to the standard rotation speed during work. Next, it is determined whether or not the rotation speed increasing operation has been performed by the swing rotation upper switch 64, and if there is a swing rotation increase adjustment operation, a rotation speed increase command is issued according to the ON time. Adjust the rotation speed. Next, it is determined whether or not the swing rotational speed has reached the upper limit swing rotational speed. When the adjusted swing rotational speed has reached the upper limit rotational speed, further raising adjustment is stopped, and thereafter, the finally adjusted swing rotational speed is adjusted. The swing rotation speed control for maintaining the dynamic rotation speed is executed.

Since the control is performed as described above, at the start of the operation, the swing rotation speed with respect to the lateral inclination angle of the swing selection plate 15 is appropriately adjusted and set, and the adjustment of the swing rotation speed by manual operation is optimized. be able to.

[Brief description of the drawings]

FIG. 1 is an overall cut side view.

FIG. 2 is a perspective view

FIG. 3 is a block diagram.

FIG. 4 is a flowchart.

FIG. 5 is a flowchart.

FIG. 6 is a flowchart.

[Explanation of symbols]

1 ... rice hulling part, 2 ... rice falling rice style selection part, 3 ... rocking sorting part, 4 ...
Mixed rice fryer, 5 ... Brown rice fryer, 6 ... Rice hopper, 7 ... Rice hulling roll, 8 ... Rice hulling room, 9 ... Rice crushed rice selection box, 10 ... Rice crushed rice selection path, 11 ... Pity trough, 12: sliding rice trough, 13: suction fan, 14: dust cylinder, 15: swing sorting plate, 16: distribution supply gutter, 17: distribution case, 18: brown rice partition plate, 19
... Rice partition plate, 20 ... Brown rice extraction gutter, 21 ... Brown rice channel, 22
... mixed rice extraction gutter, 23 ... mixed rice channel, 24 ... mixed rice hopper, 25 ... paddy extraction gutter, 26 ... paddy channel, 27 ... paddying machine,
28: Brown rice partition plate moving adjusting means, 29: Brown rice partition plate adjusting motor, 30: Rice / brown rice discrimination sensor, 31: Sensor moving means, 32: Sensor adjusting motor, 33: Partition plate origin switch (rotating side) ), 34: Partition plate origin switch (swinging side), 35: Sensor origin switch (swinging side), 36: Sensor origin switch (swinging side), 37: Paddy supply control valve, 3
8 ... Brown rice switching valve adjustment motor, 40 ... Mixed rice switching valve adjustment motor, 41 ... Control unit, 42 ... Roll deployment sensor, 43 ...
Glen sensor, 44 ... Auto / manual switch, 45 ... Raise ratio upper switch, 46 ... Raise ratio lower switch, 47 ... Display changeover switch, 48 ... Load current detection sensor, 49 ... Rice partition plate movement (position) potentiometer -50, brown rice partitioning plate movement (position) potentiometer, 51: sorting plate tilting movement (position) potentiometer, 52 ... paddy supply control valve movement (position) potentiometer, 53 ... paddy supply Adjustment lever movement (position) potentiometer, 54 ... Rice / brown rice discrimination sensor movement (position) potentiometer, 55 ... Main motor, 5
6 ... Sorting plate inclination adjusting motor, 57 ... Rice supply adjusting valve adjusting motor, 58 ... Roll gap adjusting motor, 59 ... Monitor display unit, 60 ... Swing rotation adjusting motor, 61 ... Serial data receiving circuit, 62: Serial data transmitting circuit, 63: Non-volatile memory, 64: Swing rotation upper switch, 65: Swing rotation lower switch.

Claims (1)

[Claims] 1. A swing sorting plate 15, a brown rice partition plate 18, and
The swing sorting unit 3 having a brown rice partition moving control means 28 for moving and adjusting the brown rice partition 18 and the swing sorting plate 15
Rice / brown rice discriminating sensor 30 which is provided on the discharge side of the paddy and detects the boundary position of rice / brown rice, and the brown rice partition plate 18 at a partition position related to the detection boundary position of rice / brown rice by the rice / brown rice discriminating sensor 30 Brown rice partition plate control means for adjusting the movement of the rice, lateral inclination angle adjusting means for adjusting the lateral inclination angle of the swing sorting plate 15, and lateral inclination angle detecting means for detecting the lateral inclination angle of the swing sorting plate 15. A swing rotation speed adjusting means for adjusting the swing rotation speed of the swing sorting plate 15, and the swing sorting plate 1;
A swing rotation speed detecting means for detecting the swing rotation speed of 5, and an increase / decrease adjustment of the swing rotation speed of the swing rotation speed adjusting means;
A control device for a hulling sorter, comprising: a swing rotation speed setting unit configured to set a swing rotation speed based on detection of a rice / brown rice boundary position by the brown rice determination sensor 30.