JPH0226685A - Residual grain discharge apparatus in automatic classifying and weighing machine of grain - Google Patents

Abstract

PURPOSE:To perfectly discharge the residual grain in a moving classifying cylinder by providing an inverter control circuit for increasing and decreasing the rotational speed of a spiral rotary body corresponding to the amount of the grain flowing in a moving classifying apparatus and providing a circuit for changing over rotation to high speed rotation regardless of the inflow amount of grain to said control circuit. CONSTITUTION:The inflow amount of the grain flowing in a moving classifying apparatus is detected by a detection control circuit 14 and the rotational speed of a spiral rotary body is controlled so as to increase and decrease corresponding to the inflow amount of grain. Therefore, a proper amount of grain is always stagnated in the moving classifying apparatus and desired classified grain is obtained. When the supply of grain to the moving classifying apparatus is stopped at the time of the finish of classifying and weighing work, the spiral rotary body is rapidly brought to low speed rotation or stopped in rotation by an inverter control circuit 13. Therefore, residual grain is generated in a classifying net cylinder. Then, when a change-over switch 17 is changed over to a high speed rotation setting circuit 15, the inverter control circuit 13 becomes a high speed rotary state and the spiral rotary body is rotated at a high speed to perfectly discharge the residual grain in the classifying net cylinder.

Description

[Detailed description of the invention] Industrial application field The present invention is an automatic grain sorting method that sorts grains of brown rice, wheat, etc. into grains, weighs the sorted grains by a certain weight, and fills them into storage bags. The present invention relates to a device for discharging grains remaining in a sorting screen tube of a moving sorting device in a weighing machine.

Conventional technology An automatic grain sorting and weighing machine that sorts the grains supplied from a huller, etc., removes waste grains, weighs the sorted grains, and fills them into storage bags at a constant weight. Tokukai Sho GO-7922
The one disclosed in Publication No. 9 is known.

Problems to be Solved by the Invention By the way, in this type of automatic grain sorting and weighing machine,
The spiral rotor that moves the grains in the sorting mesh cylinder is rotated at a preset constant speed, but the sorting rate (mixing ratio of unsorted grains to sorted grains) of the sorted grains is determined by the moving sorting device. In order to accurately maintain the required sorting rate and perform good sorting, it is important that the amount of grain retained in the mobile sorting device is maintained at an appropriate level. It is essential.

Therefore, by controlling the rotational speed of the spiral rotating body using an inverter control device according to the amount of grains flowing into the mobile sorting device per unit time, appropriate sorting conditions can be obtained according to a preset sorting rate. We have previously developed an automatic grain sorting and weighing machine that maintains the amount of grain retained and can accurately obtain sorted grains with the desired sorting rate. In a sorting and weighing machine, if the supply of grains is stopped at the end of the operation, the rotational speed of the helical rotor rapidly decreases, resulting in the inconvenience that grains remain in the sorting screen tube and cannot be completely removed. It turned out that.

The present invention aims to eliminate this inconvenience, and at the end of the sorting and weighing work, the inverter control circuit is switched to a high-speed rotation state regardless of the amount of grain inflow per unit time. It is an object of the present invention to provide a device for discharging residual grains in an automatic grain sorting and weighing machine, which can completely discharge the grains remaining in a mesh cylinder by rotating a spiral rotating body at high speed.

Means for Solving the Problems In order to achieve the object, the present invention is configured as follows.

In other words, the structure is that the grains after hulling are sorted into granules by a moving sorting device consisting of a sorting net tube and a spiral rotating body, and the sorted grains are weighed in fixed weight increments using a weighing scale and then filled into storage bags. The automatic grain sorting and weighing machine is equipped with an impark control circuit that increases or decreases the rotational speed of the helical rotor according to the amount of grain flowing into the mobile sorting device per unit time. A device for discharging residual grains in an automatic grain sorting and weighing machine is characterized in that it is configured with a circuit that switches to a high-speed rotation state regardless of the amount of inflow per unit time.

The rotational speed of the helical rotating body of the moving sorting device is controlled by the inverter control circuit to increase or decrease depending on the amount of grain inflow, so when the amount of grain inflow is large, the rotational speed increases, and when the amount of grain inflow is small, the rotation speed is increased or decreased. The rotation speed will decrease. When grain supply is stopped at the end of sorting and weighing work, the spiral rotor rotates at a low speed or stops rotating, so that grains remain in the sorting screen tube of the mobile sorting device without being discharged. do. Therefore, if the circuit for switching to the high speed rotation state is not activated at this time, the spiral rotor rotates at high speed and the remaining grains in the sorting screen tube are discharged.

Example An embodiment of the present invention will be described with reference to the drawings.

In FIGS. 1 and 2, l is a mobile sorting device of an automatic grain sorting and weighing machine, and this mobile sorting device 1 includes a sorting mesh tube 3 provided in an exterior body 2, and It is constructed by incorporating a spiral rotating body 4, and the spiral rotating body 4 is rotated by an electric motor 5 provided at the bottom. The sorting screen tube 3 is also rotatably supported and rotates at a much lower speed than the spiral rotating body 4. Reference numeral 6 denotes a supply hopper for supplying grains to the lower part of the sorting screen tube 3 of the mobile sorting device 1. Reference numeral 7 denotes an upper part of the particle size regulating outlet, 8 a particle size regulating tank, and a discharge outlet 1o equipped with an automatic shutter 9 is formed in the lower part of the tank 8. This automatic shutter 9 operates to fully open (large loading), half open (small loading), and close. It is not fully opened at the start of filling, but is opened halfway when the weight is close to the measured value to detect the weight to be weighed. By closing the container at the same time, it is possible to accurately fill the container with the measured amount of grain. Reference numeral 11 denotes a waste discharge ml, lla a waste receiving gutter, and llb a waste scraping blade.The waste receiving gutter 11a communicates with the waste ejecting port 11.

Reference numeral 12 denotes a weighing scale, and this weighing scale 12 has a built-in load cell that converts weight into electrical signals.

The weight scale 12 is used by being placed below the discharge port IO of the tank 8. In Figure 2, a (a) is a storage bag for grains.

The mobile sorting device 1 may be of a vertical type as shown in the figure, or may be of a horizontal type or an inclined type.

The rotational speed of the electric motor 5 that rotationally drives the spiral rotor 4 is controlled to increase or decrease by a control device shown in FIG. That is, 13 is an inverter control circuit, and 1. This inverter control circuit 13 increases or decreases the rotational speed of the electric motor 5 according to the amount of grains flowing into the mobile sorting device 1 per unit time, and detects the amount of grains flowing into the mobile sorting device 1 per unit time. , and operates upon receiving an automatic signal from the detection control circuit 14 which sends out a control signal in accordance with the detected value. 15 is a high-speed rotation speed setting circuit for discharging residual grains, and 16 is an arbitrary rotation speed setting circuit, which is a changeover switch interposed between the detection control circuit 14 and the inverter control circuit 13. 17, the inverter control circuit 13 and the detection control circuit 14 are selectively connected to each other.

This changeover switch 17 may be operated manually or may be configured with an appropriate switching circuit.

In the automatic grain sorting and weighing machine configured as described above, the amount of grains flowing into the mobile sorting device t per unit time is detected by the detection control circuit 13, and the mobile sorting is performed according to the amount of inflow. The rotational speed of the helical rotating body 4 of the device I is controlled to increase or decrease. Therefore, the mobile sorting device l always has n
Since a certain amount of grains are retained, it is possible to obtain sorted grains with a desired sorting rate.

When the supply of grains to the mobile sorting device l is stopped at the end of sorting and weighing work, etc., the inverter control circuit 13
As a result, the spiral rotating body 4 rapidly enters a low-speed rotation state or stops rotating, so that residual grains are generated in the sorting screen tube 3 without being completely discharged.

Therefore, when the selector switch 17 is switched to the high-speed rotation speed setting circuit 15 side for discharging the residual grains, the inverter control circuit 13 enters a high-speed rotation state, and the helical rotary body 4 rotates at high speed. The remaining grains are completely discharged into the tank 8 by the spiral rotating body 4 which rotates at high speed. After the remaining grains are discharged, the main power is turned off or the electric motor 5 is stopped by a separately provided timer.

In addition, in the sorting state where R amount of grains stay in the mobile sorting device l, the rotation speed of the spiral rotor 4 is approximately 340 revolutions per minute, and when discharging the remaining grains, the rotation speed of the spiral rotor 4 is lowered. Increase the speed to about 800 revolutions per minute.

When the spiral rotor 4 rotates at a low speed that causes residual grains, or when the rotation is stopped, the amount of grains remaining in the sorting screen tube 3 is about 3.5 kg. When the speed is increased, the remaining grains are completely discharged within about 30 seconds.

Effects of the Invention As described above, the present invention, while sorting grains after hulling with a moving sorting device consisting of a sorting net tube and a spiral rotating body,
In an automatic grain sorting and weighing machine that weighs the sorted grains at a constant weight using a weighing scale and fills them into storage bags, the helical rotating body is An inverter control circuit is installed to increase or decrease the rotation speed.
This inverter control circuit is configured with a circuit that switches it to a high-speed rotation state regardless of the amount of grain flowing in per unit time. By switching to high-speed rotation state regardless of the inflow amount per hour,
The effect is obtained that the grains remaining in the sorting screen tube can be completely discharged by the high speed rotation of the spiral rotor.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a vertical sectional side view of the entire automatic grain sorting and weighing machine, FIG. 2 is a vertical sectional side view of the entire grain automatic sorting mode, and FIG. 3 is a control unit. 2 is a block diagram showing the circuit configuration of the circuit. ! . . . Mobile sorting device, 3. Sorting mesh cylinder, 4. Spiral rotating body, 5. Electric motor, 6. Supply hopper, 7.
・・Sizing outlet, 8・Tank, 9・Automatic shutter, 1O・Discharge 1.12・Weighing scale, 13・・
- Inverter control circuit, 14... detection control circuit, 15
...High speed rotation speed setting circuit for discharging residual grains, 16...Arbitrary rotation speed setting circuit, 17...Selector switch

Claims (1)

[Claims] Automatic grain sorting and weighing where grains after hulling are sorted into grains using a moving sorting device consisting of a sorting screen tube and a spiral rotating body, and the sorted grains are weighed in fixed weight increments using a weighing scale and then filled into storage bags. The machine is equipped with an inverter control circuit that increases or decreases the rotational speed of the spiral rotor according to the amount of grains flowing into the mobile sorting device per unit time. What is claimed is: 1. A device for discharging residual grains in an automatic grain sorting and weighing machine, characterized in that it is configured with a circuit that switches to a high-speed rotation state regardless of the state of rotation.