JPH0141105B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention supplies mixed grains of unhulled brown rice to a rotary sorting cylinder, and the brown rice that has sunk to the bottom layer is sorted through a large number of pot holes formed on the entire surface of the cylinder. This relates to a rotary grain sorting machine that puts one grain at a time into a bowl, scoops it up higher than the paddy, and separates it into brown rice and paddy.

(Prior art) In this type of grain sorting machine, a partition plate is provided in the brown rice receiving gutter from which brown rice is taken out, and the base end of this partition plate is rotatably supported to prevent paddy from coming up the tip. The appropriate height is determined by the variety of paddy, moisture content, shedding rate, etc.
When the grain sorting machine is temporarily stopped and then restarted, even if it is adjusted to an appropriate position before stopping, the position is not necessarily the appropriate position after restarting operation.

(Problem to be Solved by the Invention) Therefore, when starting operation, it is necessary to readjust the partition plate, but conventionally, when the partition plate is started from the position at the time of stopping operation and gradually moved toward the appropriate position, If the tip of the partition plate is at a low position before stopping, there will be less mixed grains in the sorting cylinder immediately after the start of operation, and the paddy will easily enter the pot hole and rise. It is impossible to avoid the negative effect that a large proportion of the rice crosses over the partition plate and mixes into the brown rice.

The present invention aims to eliminate this disadvantage.

(Means for Solving the Problem) In order to achieve this object, the present invention raises the tip of the partition plate to a predetermined upward position at the same time as the grain sorting machine starts operating, regardless of the previous proper position. By lowering it from that position to the appropriate position, it is possible to prevent paddy from getting mixed into the brown rice side, which tends to occur at the start of operation.

That is, in the partition plate position control method of the present invention, the sorting operation of the sorting cylinder is started with the tip of the partition plate being at a predetermined position on the ascending side higher than the normal sorting operation position at the start of operation, and then the partition plate The lower end of the partition plate is moved to an appropriate position on the lowering side after waiting for a paddy sensor provided on the lower side of the partition plate to detect brown rice.

(Example) Embodiments of the present invention will be described with reference to the drawings.

1 is a rotary sorting cylinder, which has a pot hole 2 in which one grain of brown rice can be placed on the entire inside surface, and a driving roll 3 in contact with the outer periphery.
3 allows continuous rotation in a fixed direction.

4 is a supply helix for mixed grains, and a supply tube 5 is connected to its terminal end. 6 is a brown rice receiving trough that opens upward, and a brown rice take-out helix 7 is horizontally suspended at the bottom.
A partition plate 9 is connected to its edge via a partition plate drive shaft 8, and by rotating the shaft 8, the tip of the partition plate 9 is moved up and down while approaching the inner periphery of the sorting cylinder 1. 10
is a mixed grain extraction helix provided below the receiving gutter 6.

11 is a supply hopper of the huller, 12 is its discharge valve, 13 is a huller roll, and the mixed grains of paddy and brown rice after hulling are discharged into a grain storage tank 15 by a flip-up type grain raising machine 14, The sorting cylinder 1 is supplied by a supply helix 4 through a tank valve 16 for adjusting the flow rate provided at its bottom.
supply to one end of the

Among the mixed grains, brown rice with a high specific gravity sinks to the bottom layer of the bottom of the cylinder as the sorting cylinder 1 rotates, and enters the pot hole 2 and rises, while paddy with a small specific gravity, even if it enters the pot hole 2, is large in shape. It will slide down on the way and will not rise higher than brown rice.

The elevated brown rice falls from the pot hole 2 above the partition plate 9 into the brown rice receiving trough 6, and is taken out of the machine through the brown rice take-out screw 7 through the flip-up type discharging grain raising machine 17.

On the other hand, the paddy is returned to the supply hopper 11 through the return hoist 18 through the opening at the other end of the sorting tube 1, and the unsorted mixed grains are transferred from the mixed grain take-out screw 10 to the stake hoist 14. , and are combined with the mixed grains from the huller and returned to the tank 15.

When sorting mixed grains into brown rice and paddy in this way, for example, if the ratio of brown rice included in the mixed grains, that is, the shedding rate is low and there are many paddy, the probability that the paddy will enter pot hole 2 increases, and the paddy will rise higher. Therefore, the inclination angle of the partition plate 9 is raised to raise the tip to prevent rice from getting mixed into the brown rice receiving trough 6. On the other hand, when the removal rate is high and there is little paddy, on the other hand, the partition plate 9
The amount of brown rice taken out is increased by laying down and lowering the tip and expanding the total opening area of the brown rice receiving gutter 6.

Similar to the removal rate, the height of the tip of the partition plate 9 is adjusted up and down by comprehensively considering the grain variety, the amount of supply to the sorting tube 1, etc., and the height of the tip of the partition plate 9 is adjusted vertically. The mixed grains are sorted into brown rice and paddy by adjusting the partition plate 9 to an appropriate position so that a large amount of brown rice can be efficiently flowed into the brown rice receiving gutter 6.

However, in this embodiment, a sample receiving groove 19 that opens toward the distal end of the partition plate 9 and slopes gently downward toward the open end of the sorting tube 1 is integrally formed on the lower surface of the partition plate 9. A paddy sensor 20 is attached to the inner surface of the sample receiving groove 19 to detect the presence or absence of paddy and brown rice. The paddy sensor 20 is, for example, a reflective optical sensor that detects the distinction between paddy and brown rice by utilizing the property that the amount of reflected light from paddy is greater than that from brown rice.

Furthermore, a partition plate angle sensor 21 for detecting the inclination angle of the partition plate 9 is installed at one end of the partition plate drive shaft 8, and a tank valve opening sensor 22 for detecting the opening degree of the tank valve 16 is installed at one end of the opening/closing shaft of the tank valve 16. The sensors 21 and 22 are connected to the signal input side of the control unit 23, and the partition plate motor 24 that drives the partition plate 9 and the tank valve motor 25 that opens and closes the tank valve 16 are connected to the output side of the control unit 23, respectively. Connecting. Potentiometers are used for the angle sensors 21 and 22.

When the operation of the grain sorting machine is restarted after once stopping the operation, the partition plate motor 24 is rotated at the same time as the operation starts to make the partition plate 9 stand up from the inclination angle when the operation was stopped, and the tip of the partition plate is adjusted. When the partition plate angle sensor 21 detects movement to the maximum height to the limit of the movable range, the motor 24 is stopped.

Thereafter, the tank valve motor 25 is operated to open the tank valve 16 and the mixed grains are supplied to the sorting cylinder 1.
Then, as the sorting tube 1 rotates, the brown rice rises and flows into the sample receiving groove 19, and when the paddy sensor 20 detects this, control to move the partition plate 9 to an appropriate position is started. That is, the partition plate motor 24 is rotated in the opposite direction to gradually lower the tip of the partition plate 9, and as a result, when the paddy begins to flow into the sample receiving groove 19 and the paddy sensor 20 detects the paddy, the partition plate motor 24 to stop the partition plate 9 at an appropriate position.

Note that the partition plate 9 does not necessarily need to be moved to the maximum height to the limit of the adjustable range as described above when starting operation, but it should be moved to the maximum height that the paddy does not exceed even when the paddy is likely to rise immediately after the start of operation. It is sufficient that the height is high enough, and it is sufficient that it is located at a predetermined position on the ascending side which is higher than the normal sorting work position.

(Effects of the Invention) As described above, in the present invention, at the start of operation of the grain sorting machine, the tank valve 16 is opened with the tip of the partition plate 9 at a predetermined position on the rising side higher than the normal sorting work position, and the sorting operation is carried out by opening the tank valve 16. The operation starts by starting the sorting work of the tube 1, waiting for the paddy sensor 20 installed at the bottom of the partition plate 9 to detect brown rice, and then starting the control to move the tip of the partition plate 9 to the appropriate position on the descending side. This has the excellent effect of preventing paddy from being mixed into the brown rice, which tends to occur immediately after, and improving the sorting accuracy and improving the quality of the finished rice.

[Brief explanation of drawings]

FIG. 1 is an overall front view of a rotary grain sorting machine embodying the present invention, showing the main parts in cross section. FIG. 2 is a longitudinal sectional view thereof, FIG. 3 is an enlarged perspective view of the partition plate, FIG. 4 is a block diagram of the embodiment, and FIG. 5 is a flowchart showing the control procedure of the present invention. 1 is a rotating sorting tube, 2 is a pot hole, 6 is a brown rice receiving gutter,
9 is a partition plate, 19 is a sample receiving groove, and 20 is a paddy sensor.

Claims (1)

[Claims] 1. A mixed grain of paddy and brown rice is supplied to a rotary sorting tube with a pot hole on the inner periphery, and the brown rice is placed in the pot hole and raised higher than the paddy. In a rotary grain sorting machine that takes out brown rice that has risen through a stopper and sorts it into brown rice and paddy, the tip of the partition plate is at a predetermined position on the rising side higher than the normal sorting work position at the start of operation. A partition characterized in that the sorting operation of the sorting tube is started, and then the tip of the partition plate is moved to an appropriate position on the descending side after waiting for a paddy sensor provided at the lower part of the partition plate to detect brown rice. Board position control method.