JPS6232988B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a grain sorting device that detects the state of flowing grains using changes in the amount of transmitted light and improves the accuracy of grain sorting by a swinging sorter. It is something.

Conventional technology In order to improve the sorting accuracy in a oscillating sorter, it is possible to improve the sorting accuracy by using the drift flow that occurs based on the difference in specific gravity and friction (in the case of mixing paddy and brown rice, the flow of the paddy, the flow of the mixture of paddy and brown rice, and the flow of the brown rice). It is necessary to control the flow to maintain a steady state. Furthermore, in a stone removal sorter, it is important to control the mixed soil particles to be discharged when their density increases.

However, no conventional device is capable of performing such control accurately.

For example, the automatic inclination angle adjustment device for a sorting plate described in Japanese Patent Application Laid-Open No. 52-107952 has a phenomenon in which the grain layer near the lower side plate of the sorting plate becomes too thick when the grain sorting operation is not working properly. Focusing on this, the thickness of the grain layer was detected using the detection unit.
Since the device detects the thickness of the grain layer, even if it is possible to detect deviations in the overall flow of grains flowing on the sorting plate, it is possible to detect whether the center of the uneven flow of paddy or brown rice is on either the left or right side in the lateral direction of the sorting plate. It is not possible to detect whether or not the current is moving, and it is not possible to accurately guide each of the above-mentioned drifting flows to the receiving port.

Moreover, such a detection unit cannot be used to control an on-off valve when discharging earth and sand particles in a stone removal sorter.

Problems to be Solved by the Invention The present invention projects light onto the grains and detects the amount of transmitted light using a light receiving element, thereby determining the bulk of the grains on the sorting board and the state of drift. Adjust the inclination angle, frequency, or vibration stroke length of the oscillating sorting board, or connect it to the control device that opens and closes the opening/closing valve of the sorting board in the stone removal machine to discharge soil particles. The technical challenge is to enable highly accurate sorting in both cases.

Means for Solving the Problems In order to solve the above technical problems, the grain sorting device of the present invention includes a light source that emits light toward flowing grains and a light source that emits light from the grains that receive the light. A light-receiving element for detecting the amount of transmitted light is attached integrally to the sorting board at a position above and below relative to the grain, and in a region of the board surface away from the sorting frame of the oscillating sorting board, and the detection signal of the light-receiving element is shall be connected to a control device for sorting operation.

Function The amount of light transmitted through the grains flowing on the surface of the oscillating sorting board changes depending on the mixing ratio of different types of grains (paddy and brown rice, etc.) or soil grains, so the light receiving element detects this and Based on the detection signal, the inclination angle of the oscillating sorting board is adjusted to maintain a steady drift of different types of grains, and the operation of the on-off valve for discharging soil grains is controlled.

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

FIGS. 1 to 4 show a first embodiment of the present invention used in a swinging sorting device, and the angle of inclination is α.
A sorting board 3 with an uneven and rough surface is suspended on support rods 1 and 2.
The eccentric wheel 4, the rod 5, and the supports 1 and 2 vibrate at a swing angle β that is larger than α. As shown in Figure 1,
When mixed grains of paddy and brown rice (different types of grains) are fed onto the surface of the sorting board 3 from one side, brown rice with a small friction coefficient and high specific gravity is transferred to the shaking side H by the shaking action of the sorting board 3.
The rice grains, which have a large coefficient of friction and a small specific gravity, are floated and concentrated on the swinging side L, and the mixed grains of paddy and brown rice flow in the middle part. This mixed grain layer drifts toward either the upper shaking side H or the lower shaking side L depending on the mixing ratio of paddy and brown rice. At this time, the light beam projected downward from the light source 7 provided in the surface area of the sorting board 3 that is distant from the sorting frame 6 passes through the grains on the sorting board 3, and
The light is received through the transparent window 8 by the light receiving element 9 provided directly below it, and the amount of transmitted light is detected according to the mixing ratio of paddy and brown rice. A bidirectional rotating electric motor 10 that adjusts the inclination angle α of the sorting board 3 based on the detection signal.
Activate the drive control device. As a result, the position of the mixed layer of paddy and brown rice on the sorting board 3 can be maintained normally, and the sorting operation can be controlled so that each drift flow is correctly discharged to each position in the discharge section 11.

Although this is just one example, the present invention may be applied to a paddy layer or a brown rice layer to achieve various effects.

5 and 6 show a second embodiment of the present invention used in a stone removal sorter. So that the angle of inclination is α′,
The sorting board 14 leaning on the support rods 12 and 13 is moved to α' by the eccentric wheel 15, the rod 16, and the support rods 12 and 13.
The sorting plate 14 is vibrated at a larger swing angle β', and the sorting plate 14 is formed from a porous wall roughing plate 18. The screening board 18 may have a perforated wall and may also be ventilated. A light source 19 is provided above the selection board 18 in a board surface area away from the sorting frame 26, and a light receiving element 21 is provided below the transparent window 20 provided on the selection board 18 to receive light emitted from the light source 19. Discharge port 2 of panel 18
2 is provided with an on-off valve 23 which is operated by an electromagnet 25 via a control device 24 connected to the light-receiving element 21 .

The brown rice mixed with earth and sand grains is roughly selected in the rough selection board 17, and the mixed grains, which have been concentrated on the swinging side H' of the rough selection board and have increased density of soil and sand grains, are sent to the selection board 18. Then, at this point, the particles are further selected to obtain only soil grains. To use this process, light is emitted from the light source 19 onto the mixed grains on the selection board 18. Then, the light-receiving element 21 issues a detection signal to the control device according to the amount of transmitted light, and when the signal indicates that the amount of light emitted from brown rice has disappeared, only grains of dirt will be left on the selection board 18. , the on-off valve 23 is opened to discharge the earth and sand.

The light source and the light-receiving element may be positioned above or below the grains flowing on the sorting board, and the light-receiving element must have enough ability to detect the light beam that has passed through the grains.

Effects of the Invention As described above, the present invention detects the amount of light transmitted through the grains flowing on the oscillating sorting board.
For example, it is possible to distinguish between brown rice and paddy or to detect the mixed state of brown rice and paddy and send a signal to the control mechanism, so that the position and volume of the processed material on the sorting board can be adjusted to an appropriate level. It is possible to detect the degree of contamination of dirt particles by using a stone removal sorter. Therefore, it is possible to improve the accuracy of grain sorting by the oscillating sorter. In addition, since the light source and the light receiving element are integrated with the sorting board and provided in the area of the board away from the sorting frame, their relative positions do not change even when the sorting board swings. Since it is placed at a position where it is easiest to detect the mixing ratio of mixed grains, it is possible to detect with high precision, perform accurate sorting, and improve work efficiency.

[Brief explanation of the drawing]

The drawings are illustrations of embodiments of the present invention. 1 to 4 show the first embodiment, FIG. 1 is a plan view of the oscillating sorting board, FIG. 2 is a side view of the oscillating sorting machine equipped with the sorting board, and FIG. 3 is a side view of the oscillating sorting machine equipped with the sorting board. FIG. 4 is a partially enlarged plan view of the sorting board, FIG. 4 is a partially enlarged sectional view of the sorting board, FIGS. 5 and 6 show a second embodiment, and FIG. FIG. 6 is a partially enlarged sectional view thereof. 1... Support rod, 2... Support rod, 3... Sorting board, 4... Eccentric wheel, 5... Rod, 6... Sorting frame, 7... Light source, 8... Transparent window, 9... Light receiving element, 10... Rotating motor, 11...
Discharge section, 12... Support rod, 13... Support rod, 14... Sorting board, 15... Eccentric wheel, 16... Rod, 17... Porous wall rough selection board, 18... Selection board, 19... Light source, 20... Translucent window, 21... Light receiving element, 22... Discharge port, 23... Opening/closing valve, 24... Control device, 25... Electromagnet, 26... Sorting frame, α, α'... Inclination angle of sorting board, β, β'... Rocking angle, H , H′...Upward swinging side of the board, L...Downward swinging side of the board.

Claims (1)

[Claims] 1. A light source that emits light toward the flowing grains and a light receiving element that detects the amount of transmitted light from the grains that receive the light are integrated into the sorting board at positions above and below the grains. What is claimed is: 1. A grain sorting device, characterized in that the grain sorting device is mounted on a surface area of a oscillating sorting board that is far away from a sorting frame, and a detection signal from a light receiving element is connected to a control device for sorting operation.