JPH0237231B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an improvement of an automatic boundary plate control device for a grain sorting device, and in order to achieve large sorting ability with high sorting accuracy, it is possible to improve the sorted grain flux and mixed grains. It was developed to clearly divide the boundaries of the flux and allow it to flow out.

Prior Art As shown in Japanese Patent Publication No. 48-26146, an illumination light that can be moved in the width direction of the sorting plate is provided slightly above the front end of the oscillating sorting plate, and this illumination light receives the output of an amplifier. Distinguishing and extracting brown rice and paddy from a swing sorter in which a servo motor that controls the direction of the light is integrally configured, and the brown rice and paddy removal gutter also moves in the same direction as the direction of the light changes. A device has been proposed.

However, this device is designed so that a single illumination light detects only the reflected light from the paddy, so it is unable to detect the complex state of the paddy mixture near the boundary between brown rice and mixed brown rice/paddy grains. Ta.

Problems to be Solved by the Invention An object of the present invention is to solve the problem of flowing heterogeneous grains that react differently to light, especially near the boundary between different grains that react differently to light and mixed grains thereof. By detecting the mixing ratio of grains with high precision, the distribution state of grains in the grain outflow passage of the grain sorting board is automatically detected, and this detection signal is used to always place the separation wall at the boundary between different types of grains. Grain that is correctly positioned, does not require human labor, improves work efficiency, and prevents foreign grains from getting mixed into the sorted grain by ensuring that the boundary plate is positioned in the sorted grain flux. An object of the present invention is to provide an automatic boundary plate control device for a sorting device.

Means for Solving the Problems The present invention provides a boundary plate automatic control device for a grain sorting device in which a boundary plate is movably and stopably provided along one side of the sorting plate. A photoelectric device including a large number of light sources and a light receiving element facing the outflow passage is connected to a motor, and the motor has a control circuit that controls the signal by counting signals from the light receiving element and comparing the signals with a set value. The photoelectric device is electrically connected to the light receiving element through the boundary plate, and the photoelectric device is disposed at a distance on the mixed particle flux side with respect to the boundary plate.

In the present invention, a photoelectric device for detecting foreign grains from mixed grains is located on the side of the mixed grain flux. The phenomenon of drifting the mixed grain flux while increasing the mixing density of different kinds of grains is exhibited, and the boundary between the sorted grain flux and the mixed grain flux is continuous and there is no clear linear boundary. A photoelectric device is placed at a position where the presence of foreign grains can be detected for grains taken out from a flux in which the mixing ratio of foreign grains is small and is close to the sorted grain flux, and the photoelectric device is connected to the photoelectric device. The provided boundary plate moves in a tracking manner in the boundary area to verify the appropriate position of the appropriate boundary plate.

Embodiment In FIGS. 1, 2, and 3, a sorting board is tilted at an angle α with respect to a horizontal plane in front-rear directions A and B, and swings back and forth at an angle β larger than the inclination angle α with respect to the horizontal plane. 1 is shown, which is substantially orthogonal to the front-rear directions A and B and inclined in the outflow direction C with respect to a horizontal plane.

In this sorting device, when mixed grains are fed from the side opposite to the outflow side, grains with a small friction coefficient and high specific gravity are sent to the front A side, and grains with a large friction coefficient and low specific gravity are sent to the rear B side. During this time, the mixed particles form a flux and are discharged in the outflow direction C.

In other words, the flux of sorted particles with a small coefficient of friction and a large specific gravity;
For example, the brown rice flux R gathers on the front side A, and then generates a mixed grain flux, for example, a mixed rice flux Q of unhulled brown rice, and is discharged in the outflow direction C. By locating the boundary plate 2 in the boundary area D of both fluxes, the sorted grain flux flows out into the discharge passage 3, and the mixed grain flux flows into the discharge passage 4, where they are respectively sorted. As shown in FIG. 4, the light emitted from the light source 7 of the sensor assembly 6 consisting of the light source 7 of the photoelectric device 5 and the light receiving element 8 connected to the boundary plate 2 and the mixed grain flux onto the grains is reflected. When the light beam is received by the light receiving element 8, the electric motor 9 rotates forward or backward depending on the number of different particles detected within a certain period of time, and the screw shaft 10 rotates to adjust the movement of the boundary plate 2 back and forth.

The electric circuit will be explained with reference to FIG. 7. Each light receiving element 8A, 8B, 8C... of the photoelectric device 5 will be explained with reference to FIG.
(only 8A is shown and the others are omitted) are connected to the input sides of amplifiers 11A, 11B, 11C, and the output sides of each amplifier 11A, 11B, 11C... are connected by conductive wires to form a counting circuit. 12, and its output side is connected to comparator 13 and comparator 1.
4, one side terminal of a separately provided clock pulse generator 15 is connected to the enable terminal 16 of the counting circuit 12, and the other side terminal of the clock pulse generator 12 is connected to the frequency divider 17. The output side is branched and connected to the carry output terminal 18 of the counting circuit 12 and each of the comparators 13 and 14, respectively. Reference numeral 19 denotes a setter for the upper limit value of the number of detected foreign objects provided on the side of each comparator 13, and numeral 20 represents a setter for the lower limit value of the number of detected foreign objects provided on the side of the comparator 14. Further, the output side of the comparator 13 is connected to the motor 9 for forward/reverse rotation via the amplifier 21 and the relay _R1 , so that the motor 9 is rotated in the forward direction by the output signal, and the output of the comparator 14 is Amplifier 22 and relay on the side
It is connected to the electric motor 9 via _R2 so that the electric motor 9 can be rotated in the reverse direction by its output signal.

Therefore, the sorted grains flowing through the lower surface of the photoelectric device 5 provided on the boundary plate 2 are
Each of the light receiving elements 8A, 8B, 8C... detects the amount of light emitted from B, 7C... and reflected, and the detection signal is sent to each amplifier 11A, 11B, 1.
1C... and input to the counting circuit 12, and the input signal is counted by the pulse signal from the clock pulse generator 15 inputted via the enable terminal 16, and the input signal from the frequency divider 17 Based on the signal, the number of mixed foreign particles within an arbitrary fixed time is cumulatively calculated, and the signal is input to each comparator 13 and 14, and
The signal input to side 3 is compared with the upper limit value of the number of detected foreign objects set in setting device 19, and if the upper limit value is exceeded, the comparison signal is amplified by amplifier 21 and sent to relay _R1 . The motor 9 is actuated, and the electric motor 9 is rotated in the forward direction to move the boundary plate 2 to the brown rice grain bundle R side via the screw shaft 10, and the signal input to the comparator 14 side detects the foreign object set in the setting device 20. The comparison signal is compared with the lower limit value of the number of pieces, and if it falls below the lower limit value, the comparison signal is sent to the amplifier 2.
2 actuates relay R ₂ , which reversely rotates electric motor 9 to rotate screw shaft 10 .
The boundary plate 2 is moved toward the mixed rice grain flux Q side via Once the position of the boundary plate 2 is determined by repeating the process, the movement adjustment is stopped and stabilized.

Next, an electric circuit according to another embodiment of the present invention will be described with reference to FIG.

Each light receiving element 8A, 8B, 8C of the photoelectric device 5...
(only 8A is shown and the others are omitted) are connected to the input sides of amplifiers 11A, 11B, 11C..., and their respective output sides are connected by conductive wires, with one end connected to the adder 23. Connect to the input side,
The output side of the adder 23 is connected to the input side of an integrator 25 via a shift circuit 24. Also, the integrator 25
The output side of the comparator 26 is branched and one end thereof is connected to one input terminal of the comparator 26, and the other end is connected to the other input terminal of the comparator 27. The upper limit value setter 28 of
In addition, a setter 29 for the lower limit value of the number of detected foreign objects is connected to the other input terminals of the comparator 27, and the comparator 2
The output side of the comparator 27 is connected to the motor 9 for forward/reverse rotation via the drive 30 and relay _R1 so that the motor 9 rotates in the forward direction according to the output signal, and the output side of the comparator 27 is connected to the drive 31 and the relay R1. It is connected to the electric motor 9 via _R2 so that the electric motor 9 rotates in the reverse direction in response to its output signal. 3
2 is a variable resistor provided in the shift circuit 24 for setting a reference value for detecting foreign particles.

Therefore, according to this embodiment, the sorted grains flowing through the lower surface of the photoelectric device 5 provided on the boundary plate 2 are irradiated by each of the light sources 7A, 7B, 7C... Elements 8A, 8B, 8C
... are respectively detected, and the detection signal is transmitted to each amplifier 1.
1A, 11B, 11C, etc., and inputted to the adder 23 to cumulatively calculate the total number of flowing grains, and the output signal is sent to the shift circuit 2.
4 and is compared with a reference value for detecting foreign particles set in the variable resistor 32. Signals below the reference value are shifted and eliminated, and only shifted signals of foreign particles exceeding the reference value are sent to the integrator 25. is input, integrated, and input to each comparator 26, 27, and comparator 2
On the 6 side, if the input signal exceeds the upper limit of the number of foreign objects detected set in the setting device 28, the comparison signal activates the relay _R1 via the drive 30,
Therefore, the electric motor 9 rotates forward and moves the boundary plate 2 to the brown rice grain bundle R side via the screw shaft 10,
Also, on the comparator 27 side, the input signal is input to the setter 29.
When the number _of detected foreign objects falls below the lower limit value set in
is moved toward the mixed particle flux Q side, and the adjustment is repeated by automatically moving until the number of different types of particles detected by the sensor and integrated falls within the standard number, and the position of the boundary plate 2 is adjusted. Once determined, the movement adjustment is stopped and stabilized.

FIG. 5 shows another embodiment of the photoelectric device 5, in which a hollow grain cylinder 33 is installed on the side of the boundary plate 2 at an appropriate interval W, and the grain cylinder 33 is A plurality of light sources 7... and a light receiving element 8... face toward the inner surface.
(not shown) are mounted together and the grains flow down in contact with the transparent wall surface of the grain flow tube 33, so that the amount of light of the grains can be detected.

FIG. 6 shows another embodiment of the sorting board, in which a large number of small holes 35 are provided on the surface of the sorting board 34, and a wind chamber 36 is installed at the bottom of the sorting board 34, and the screen is diagonally upward from the bottom of the sorting board 34. Air is blown intermittently to sort the grains flowing on the sorting board 34 by specific gravity, and bunches of brown rice grains are concentrated near the front of the sorting board, and bundles of paddy grains are concentrated near the back of the sorting board. This figure shows a fixed type blast-type sorting device that collects grain bundles of mixed grains of paddy and brown rice and discharges them through respective discharge channels provided at the edge of the plate.

Effects of the Invention According to the present invention, a plurality of light-receiving elements are used to detect flowing heterogeneous grains that react differently to light, especially in the vicinity of the boundary between different grains that react differently to light and mixed grains thereof. By detecting the grain mixing ratio with high precision, the distribution state of grains in the grain outflow passage of the grain sorting plate can be accurately detected, and this detection signal can be used to constantly align the separating wall to the boundary between different types of grains. Correct positioning eliminates the need for manpower and improves work efficiency. Furthermore, since the photoelectric device is placed at a distance from the boundary plate on the mixed grain flux side, the boundary plate can be reliably sorted. It can be positioned in the grain flux, and a highly accurate sorted grain flow can be obtained without mixing different kinds of grains into the sorted grains.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which FIG. 1 is a side sectional view of the device, FIG. 2 is a plan view thereof, FIG. 3 is a sectional view of its discharge path, and FIG. 4 is a side view of the photoelectric device. FIG. 5 is a perspective view of another embodiment of the photoelectric device, FIG. 6 is a side sectional view of another embodiment of the sorting board, and FIGS. 7 and 8 are diagrams each showing different embodiments of the electric circuit. It is. 1... Sorting board, 2... Boundary plate, 3... Discharge path,
4...Exhaust channel, 5...Photoelectric device, 6...Aggregation,
7, 7A, 7B, 7C...Light source, 8, 8A, 8
B, 8C... Light receiving element, 9... Electric motor, 10...
Screw shaft, 11, 11A, 11B, 1
1C... Amplifier, 12... Counting circuit, 13... Comparator, 14... Comparator, 15... Clock pulse generator, 16... Enable terminal, 17... Frequency divider, 18... Carry output Terminal, 19...
... Setting device, 20 ... Setting device, 21 ... Amplifier, 2
2...Amplifier, 23...Adder, 24...Shift circuit, 25...Integrator, 26...Comparator, 27...
... Comparator, 28 ... Setting device, 29 ... Setting device, 3
0... Drive, 31... Drive, 32... Variable resistor, 33... Grain barrel, 34... Sorting board, 3
5... Small hole, 36... Wind chamber, A... Rocking direction (front), B... Rocking direction (backward), C... Outflow direction,
D...boundary zone, R...brown rice grain bundle, Q...mixed rice grain bundle, W...interval, α, β...angle.

Claims (1)

[Claims] 1. In a boundary plate automatic control device for a grain sorting device in which a boundary plate is movably and stopably provided along one side of the sorting plate, the boundary plate has a large number of light sources and light receiving elements facing the grain outflow passage of the sorting plate. A photoelectric device is connected to a motor, and the motor is electrically connected to the light receiving element via a control circuit that controls the signal by counting the signal from the light receiving element and comparing it with a set value. . A boundary plate automatic control device for a grain sorting device, wherein the photoelectric device is arranged at a distance from the boundary plate on the mixed grain flux side.