JPS6119316B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an automatic control device for an oscillating grain sorter.

BACKGROUND TECHNOLOGY In an oscillating grain sorting machine in which mixed grains of different types are concentrated and separated into a front side and a rear side by a grain sorting plate, the grains flow laterally and flow down from the end of the grain sorting plate. When grains flow normally over the grain selection plate, almost the entire surface of the grain selection plate is covered with grains, but when the flow rate, different grain mixing ratio, variety, etc. change, changes occur and the grain selection The flow velocity of grains on the board drifts to either the front or back, creating a blank space on the opposite side of the drift and exposing the grain selection board surface.
The non-sorting area on the sorting board surface becomes larger and the sorting efficiency deteriorates.

Problems to be Solved by the Invention It is an object of the present invention to solve the above-mentioned drawbacks so that the transparent window provided on the grain sorting plate is exposed and the light emitted from the light source passes through the transparent window and is received by the light receiving element. Based on the detection signal, the adjustment motor rotates in the forward or reverse direction, automatically adjusting the elevation angle, swing angle, frequency, amplitude, etc. of the grain selection plate to restore the normal distribution state on the grain selection plate surface. An object of the present invention is to provide an automatic control device for an oscillating grain sorting machine, which can be driven in such a manner as to maintain stable and highly accurate grain sorting at all times.

Means for Solving the Problems The automatic control device for the oscillating grain sorting machine of the present invention vibrates the grain sorting plate with the rough surface back and forth in an upward direction, and moves the mixed grains supplied to the grain sorting plate forward. In the grain sorting device, the grain sorting device separates the grains from each other rearward and flows them in the horizontal direction and discharges the grains to the unfinished strokes of the grain sorting plate. It has a configuration characterized in that it is equipped with an angle changing device that is driven by the output of the light receiving element and adjusts the angle of the grain selection plate, or a transmission device that adjusts the frequency of the grain selection plate.

Embodiments Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

Using mixed grains of paddy and brown rice as the grains to be sorted, the relationship between the grain flow phenomenon and the photoelectric device is shown in Figures 1 and 3. In other words, the plan view of the main part equipped with a light receiving element and showing the drift of grain flow velocity, Figures 2 and 4.
The figures are side sectional views of FIGS. 1 and 3, respectively.

The first embodiment of the present invention is shown in FIGS. 5, 6 and 1.
To explain Fig. 0, the grain selection plate 1 inclined at an elevation angle α in the front upward direction is tilted by the surrounding frame 3, and the grain selection plate 1 is tilted forward and backward at the average swing angle β in the front upward direction. The attached peripheral frame 3 is supported on a frame rod 6 by swinging rods 4 and 5, and the swinging rod 5 is connected to a moving fulcrum 9 of an adjustment rod 8 that is screwed into a screw shaft 7, The height of the moving fulcrum 9 is adjusted by the movement, and the elevation angle α of the grain selection plate 1 is adjusted.

Transparent windows 10 and 11 are provided on both the front and rear sides of the grain sorting board 1, and light sources 12 and 13 are mounted on the upper part of the grain selection plate 1 with a gap therebetween. 15 will be added. Light receiving element 14,1
5 is shielded from light when grains flow through the translucent windows 10 and 11, and receives light emitted from light sources 12 and 13 when the windows are blank.

The grain selection board 1 is a rod 1 of an eccentric 17 mounted on a main shaft 16 driven by a main electric motor 22.
The upper fulcrum 19 of the swinging rod 4 of the grain sorting plate 1 is moved by the swinging rods 4 and 5 inclined at 8 to swing obliquely back and forth at an average swinging angle β, and either of the light-receiving elements 14 or 15 receives light. When this occurs, a detection signal is sent to the adjustment motor 20, the screw shaft 7 rotates, the adjustment rod 8 is moved, and the lower support point 21 of the frame rod 6 is moved up and down, and the swing rod 5 is moved up and down its upper support point 9'. The elevation angle α of the grain selection board 1 is increased or decreased, and the grain flux on the grain selection board 1 is moved and adjusted.

When a heterogeneous mixture of grains such as paddy and brown rice is fed from the grain feeding section 2 onto the grain selection plate 1, if the surface of the grain selection plate 1 is exposed on either the front or back of the grain selection plate 1, the light receiving element 14, 15 sends a signal to the regulating motor 20 through an electric circuit, and the inclination/elevation angle α of the grain selection plate 1 is automatically adjusted to always maintain normal flow and smooth grain selection action.

Next, the second embodiment of the present invention will be explained with reference to FIGS. 7, 8, and 10. The swinging rods 4 and 5 of the grain selection plate 1 change angles about the main shaft 16 of the eccentric 17. Both lower fulcrums 2 are attached to the angle-changing lever 23
4 and 24', and is connected to the peripheral frame 3 of the grain selection plate 1 with upper support points 19 and 19', and the adjustment electric motor 20 is rotated forward or reverse depending on the detection signal of the light receiving element 14 or 15. Then, the screw shaft 7 rotates and the fulcrum 24
The grain flow distribution on the grain selection plate 1 is automatically adjusted by changing the angle of the rocking rods 4 and 5 by raising and lowering the grain selection plate 1, and at the same time changing the rocking angle β of the grain selection plate 1. As the swinging angle β increases, the effect of swinging the rice grains forward becomes greater, so by adjusting the swinging angle β, the grain flow distribution on the grain selection plate 1 can be automatically adjusted back and forth.

A third embodiment of the present invention will be described with reference to FIGS. 9 and 10. A grain selection plate 1 is supported swingably by swinging rods 4 and 5, and a main shaft 16 of an eccentric 17 is connected to a main motor 22. is driven and rotated by the transmission device 25, and the transmission device 25 is driven and rotated by the adjusting electric motor 20.
Adjust by. The adjusting motor 20 receives detection signals from the light receiving elements 14 and 15 and rotates in the forward or reverse direction. In other words, the larger the frequency or amplitude of the grain selection plate 1, the greater the effect of shaking the grains forward.
The flow distribution can be automatically adjusted back and forth.

FIG. 10 shows the light receiving elements 14, 15 and the control device 26.
The electric circuit of the present invention connects the optoelectronic device, the control device 26, and the regulating motor 20.

When the light emitted from the light bulb 27 or 28 as a light source is received by the photodiode 29 or 30 of the photoelectric conversion element, that is, the light receiving element, the potential generated is amplified in the amplifier 31 or 32, and the electric potential is amplified depending on the amount of light. The regulating motor 20 is rotated forward or backward via a control device 26 provided with a variable resistor 33 or 34 for determining the operating point.
From the light receiving element to amplifiers 31, 32, variable resistor 3
3, 34 and relays 35, 36 are connected to the regulating motor 20 via electric circuits 37, 38.

The elevation angle used in the present invention refers to the inclination angle α of the grain selection plate toward the front, and the swing angle refers to the average elevation angle β at which the grain selection plate vibrates back and forth in the forward upward direction, and is always 0°≦ In principle, the relationship α<β is established. Further, the light source means an electric light (incandescent lamp, arc lamp, fluorescent lamp, etc.) or a light emitting diode, etc., and the photoelectric conversion element, that is, the light receiving element is a photovoltaic element (selenium photovoltaic cell, silicon solar cell, photodiode, phototransistor, etc.). ) refers to photoelectron emitting devices (phototubes, photomultiplier tubes, television camera tubes, image tubes, etc.).

Effects of the Invention As described above, the automatic control device for the oscillating grain sorting machine of the present invention vibrates the grain sorting plate with the rough surface back and forth in an upward direction, and removes the mixed grains supplied to the grain sorting plate. In a grain sorting device that separates the grains into front and rear portions and causes them to flow laterally and discharge them to the unfinished strokes of the grain sorting plate, a light source and a light receiving device are provided which face each other through a transparent window provided in the grain sorting plate. The grain selection plate is equipped with an angle changing device that is driven by the output of the light receiving element and adjusts the angle of the grain selection plate, or a transmission device that adjusts the frequency of the grain selection plate. When the flow distribution state of the heterogeneous mixed grains above is modulated and the transparent window is exposed, the light emitted from the light source is immediately received and detected by the light receiving element through the transparent window, and the detection signal is transmitted. The detection signal device of the light receiving element sends a signal to the electric motor, and the electric motor is rotated in either forward or reverse direction, and the angle changing device automatically adjusts the elevation angle or swing angle of the grain selection plate, thereby changing the surface of the grain selection plate. The grain flow distribution state can be normally rectified and maintained, improving grain selection accuracy and achieving a remarkable effect in streamlining grain selection work by saving labor.

In particular, in the present invention, since the light source and the light receiving element are installed facing each other through the transparent window provided on the grain sorting plate, the light directed from the light source to the light receiving element is transmitted directly to the grain itself, regardless of the surface condition of the grain. Since the light receiving element detects the presence/absence of the sorting plate, the sorting plate can be controlled with high accuracy.

[Brief explanation of the drawing]

The drawings are illustrations of embodiments of the present invention. 1 and 3 are plan views showing the grain flux of the main part, FIGS. 2 and 4 are side sectional views, respectively, FIG. 5 is a side sectional view of the first embodiment, and FIG. 6 is a side sectional view of the first embodiment. 7 is a side sectional view of the second embodiment, FIG. 8 is a front view thereof, FIG. 9 is a side sectional view of the third embodiment, and FIG. 10 is an electric circuit diagram. 1...grain sorting board, 2...grain feeding section. 3... Peripheral frame, 4... Swinging rod, 5... Swinging rod, 6... Framing rod, 7... Spiral shaft, 8... Adjustment rod, 9... Moving fulcrum, 10... Translucent window, 11... Translucent window, 12 ... light source, 13... light source, 14... light receiving element,
15... Light receiving element, 16... Main shaft, 17... Eccentric, 18... Rod, 19, 19'... Upper fulcrum, 20... Adjustment electric motor, 21... Lower fulcrum, 22
... Main electric motor, 23... Angle lever, 24, 24'...
Lower fulcrum, 25... Transmission device, 26... Control device, 2
7... Light bulb, 28... Light bulb, 29... Photo diode, 30... Photo diode, 31... Amplifier, 3
2... Amplifier, 33... Variable resistor, 34... Variable resistor, 35... Relay, 36... Relay, 37... Electric circuit, 38... Electric circuit.

Claims (1)

[Scope of Claims] 1. A grain selection plate with a rough surface is vibrated back and forth in an upward direction, and the mixed grains supplied to the grain selection plate are separated into the front and rear directions, respectively, and flowed in the lateral direction. In a grain sorting device that discharges grains in the final stroke of the grain sorting plate, a light source and a light receiving element are installed which face each other through a light-transmitting window provided on the grain sorting plate, and are driven by the output of the light receiving element. An automatic control device for an oscillating grain sorting machine, characterized in that it is provided with an angle changing device that adjusts the angle of the grain plate or a transmission device that adjusts the frequency of the grain sorting plate. 2. The automatic control device for an oscillating grain sorting machine according to claim 1, wherein the light source and the light receiving element are provided at the front and rear of the grain sorting plate, respectively. 3. The automatic control device for an oscillating grain sorting machine according to claim 1 or 2, wherein the angle changing device adjusts the elevation angle of the grain sorting plate by moving the grain sorting plate forward up and down. 4. The automatic oscillating grain sorting machine according to claim 1 or 2, wherein the angle changing device moves the grain selection plate up and down toward the front and adjusts the swing angle of the grain selection plate. Control device.