JPH0763683B2 - Residual grain discharging device in automatic grain sorting and weighing machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an automatic sorting of grains such as brown rice and wheat, which are grain-sorted, and the selected grains are weighed by a constant weight and filled in a storage bag. In a weighing machine, it relates to a device for discharging the grains remaining in the sorting net cylinder of the moving sorting device.

2. Description of the Related Art An automatic grain sorting and weighing machine that sorts grains supplied from a hulling machine and the like to remove waste grains, weighs the sorted grains and fills a storage bag with a constant weight, The one disclosed in JP-A-60-79229 is known.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention By the way, in this kind of automatic grain sorting and weighing machine,
The spiral rotating body that moves the grains in the sorting mesh cylinder is rotated at a preset constant speed. The sorting rate of the sorted grains (mixing ratio of non-sized particles to sized particles) is determined by the moving sorting device. Since it is greatly affected by the retention amount of the grain in the, the retention amount of the grain in the moving sorting device is always kept appropriate in order to maintain the required sorting rate accurately and perform good sorting. It is essential.

Therefore, by controlling the rotation speed of the spiral rotor with the inverter control device according to the amount of grains flowing into the moving sorting device per unit time, appropriate sorting conditions according to the preset sorting rate can be obtained. We first developed an automatic grain sorting and weighing machine that can retain the amount of retained grains and accurately obtain granular grains with a desired sorting rate. In the sorting and weighing machine, if the supply of the grains is stopped at the end of the work, the rotation speed of the spiral rotator will be rapidly reduced, so that the grains remain in the sorting net cylinder and cannot be completely removed. I knew that.

The present invention is intended to eliminate this inconvenience, while providing an inverter control circuit for increasing or decreasing the rotation speed of the spiral rotor according to the inflow amount of grain per unit time flowing into the moving and sorting device, An arbitrary rotation speed setting circuit that increases or decreases the rotation speed of the spiral rotating body according to the inflow amount of grain per unit time with the inverter control circuit, and a high speed that switches to a high speed rotation state regardless of the inflow amount of grain per unit time By providing a changeover switch for switching between the rotation speed setting circuit, the arbitrary rotation speed setting circuit and the high speed rotation speed setting circuit, it is possible to change the switch to the high speed rotation speed setting circuit side at the end of sorting work etc. It becomes a rotating state, and even if it switches to a high speed rotating state,
Just by changing the selector switch to the arbitrary rotation speed setting circuit side, it is possible to immediately return to the predetermined sorting state, and even when changing the type of grain to be sorted during the sorting work, the work will not be delayed and the efficiency will be improved. It is an object of the present invention to provide a discharge device for residual grains in a grain selection and weighing machine that can be frequently performed.

Means for Solving the Problems The present invention has the following configuration in order to achieve the object.

That is, the structure is such that while grain-sorting the grain after hulling with a moving sorting device consisting of a sorting net cylinder and a spiral rotator, the sorted grain is weighed by a constant weight with a weighing scale and filled in a storage bag. In an automatic grain sorting and weighing machine, an inverter control circuit that increases or decreases the rotation speed of the spiral rotating body according to the inflow amount of grain per unit time flowing into the moving sorting device is provided, and the inverter control circuit is set per unit time. Optional rotation speed setting circuit that increases or decreases the rotation speed of the spiral rotating body according to the inflow amount of the grain, and a high-speed rotation speed setting circuit that switches to the high-speed rotation state regardless of the inflow amount of the grain per unit time, A residual grain discharging device for an automatic grain sorting and weighing machine characterized by being provided with a changeover switch for switching between a rotation speed setting circuit and a high-speed rotation speed setting circuit. It is.

The rotating speed of the spiral rotating body of the work moving / sorting device is controlled by the inverter control circuit to increase or decrease depending on the inflow amount of the grain. Then the rotation speed decreases. If the grain supply is stopped at the end of sorting and weighing work, the spiral rotor will rotate at a low speed or stop rotating, so the grains in the sorting net cylinder of the moving sorting device will remain without being discharged. To do. Therefore, when the circuit for switching to the high-speed rotation state is operated at this time, the spiral rotating body rotates at high speed, and the residual grains in the sorting net cylinder are discharged.

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

In FIG. 1 and FIG. 2, reference numeral 1 is a moving sorting device of an automatic grain sorting and weighing machine. This moving sorting device 1 is provided with a sorting net cylinder 3 inside an exterior body 2, and The spiral rotating body 4 is internally configured, and the spiral rotating body 4 is rotated by an electric motor 5 provided below. The sorting net cylinder 3 is also rotatably supported, and relatively rotates at a much lower speed than the spiral rotor 4. Reference numeral 6 denotes a supply hopper for supplying grains to the lower portion of the sorting net cylinder 3 of the moving sorting device 1. 7 is an upper sizing outlet, 8
Is a sizing tank, and a discharge port 10 having an automatic shutter 9 is formed in the lower portion of the tank 8. The automatic shutter 9 operates to fully open (large input), half open (small input) and close. When the filling is started, the automatic shutter 9 is fully opened, and when it is close to the measured value, it is half opened to detect the weight to be weighed. By closing at this time, it is possible to accurately fill the measured amount of grains. Reference numeral 11 is a residual rice discharge port, 11a is a waste grain receiving gutter, and 11b is a waste grain sweeping blade, and the waste grain receiving gutter 11a communicates with a waste grain discharging port (not shown). 12
Is a scale, and the scale 12 has a built-in load cell that converts weight into an electric signal. The weighing scale 12 is used by being arranged below the discharge port 10 of the tank 8. In FIG. 2, a is a grain storage bag.

The moving / sorting device 1 may be a vertical type as shown, or may be a horizontal type or an inclined type.

The electric motor 5 that rotationally drives the spiral rotator 4 has its rotational speed controlled to be increased or decreased by the control device shown in FIG. That is, 13 is an inverter control circuit, and this inverter control circuit 13 controls the rotation speed of the electric motor 5 to increase or decrease according to the amount of the grain flowing into the moving and sorting apparatus 1 per unit time. It operates by receiving an automatic signal from a detection control circuit 14 which detects the inflow amount of particles per unit time and sends a control signal according to the detected value. Reference numeral 15 is a high-speed rotation speed setting circuit for discharging residual grains, 16 is an arbitrary rotation speed setting circuit, and these are changeover switches interposed between the detection control circuit 14 and the inverter control circuit 13. The detection control circuit 14 is selectively connected to the inverter control circuit 13 via 17, respectively. The changeover switch 17 may be manually operated or may be configured by an appropriate switching circuit.

In the automatic grain sorting and weighing machine configured as described above, the inflow amount of the grain per unit time flowing into the moving and sorting device 1 is detected by the detection control circuit 14, and the moving sorting is performed according to the inflow amount. The rotation speed of the spiral rotor 4 of the device 1 is controlled to increase or decrease. Therefore, an appropriate amount of grain is always retained in the moving and sorting apparatus 1, so that the sorted grain having a desired sorting rate can be obtained.

When the supply of the grains to the moving / sorting device 1 is stopped at the end of the sorting and weighing work, the spiral rotating body 4 is rapidly turned to the low speed rotation state by the inverter control circuit 13, or the rotation is stopped. Residual grains are generated in the cylinder 3 without being completely discharged. Therefore, when the changeover switch 17 is switched to the high speed rotation speed setting circuit 15 side for discharging the residual grain, the inverter control circuit 13 is in a high speed rotation state,
Since the spiral rotator 4 rotates at high speed, the grains remaining in the selection mesh cylinder 3 are completely discharged into the tank 8 by the spiral rotator 4 rotating at high speed. After the residual grain is discharged, the main power is turned off or the electric motor 5 is stopped by a timer provided separately.

In the sorting state in which an appropriate amount of grains stays in the moving sorting device 1, the rotation speed of the spiral rotating body 4 is about 340 rotations per minute, and the rotation speed of the spiral rotating body 4 is changed every time when discharging the residual grain. Speed up to about 800 rpm. The rotation amount of the grain in the sorting net cylinder 3 in a state in which the spiral rotor 4 is rotated at a low speed such that residual grains are generated or the rotation is stopped is about 3.5 Kg. When the speed is increased, the residual grain is completely discharged within about 30 seconds.

EFFECTS OF THE INVENTION According to the present invention, when the sorting operation is completed, the changeover switch is switched to the high-speed rotation speed setting circuit side to be in a predetermined high-speed rotation state, and even when the high-speed rotation state is changed,
By switching the selector switch to the arbitrary rotation speed setting circuit side, it is possible to immediately return to the predetermined sorting state, and even when changing the type of grain to be sorted in the middle of the sorting work, work is not stopped and efficiency is improved. The effect that can be done well is obtained.

[Brief description of drawings]

The drawings show an embodiment of the present invention, FIG. 1 is a vertical sectional side view of an automatic grain sorting and weighing machine, FIG. 2 is a vertical sectional side view of the same as above, and FIG. 3 is a control unit. 3 is a block diagram showing the circuit configuration of FIG. DESCRIPTION OF SYMBOLS 1 ... Moving / sorting device, 3 ... Sorting mesh cylinder, 4 ... Spiral rotating body, 5 ... Electric motor, 6 ... Supply hopper, 7 ... Graining and discharging port, 8 ... Tank, 9 ... Automatic shutter , 10 …… Discharge port, 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…
… Changeover switch

Claims (1)

[Claims] 1. Grains to be packed into a storage bag by weighing a certain weight of the sorted grains with a weight scale while sorting the grains after hulling with a moving sorting device consisting of a sorting net cylinder and a spiral rotator. In the automatic grain sorting and weighing machine, an inverter control circuit that increases or decreases the rotation speed of the spiral rotor according to the inflow amount of grain per unit time flowing into the moving sorting device is provided, and the inverter control circuit Arbitrary rotation speed setting circuit that increases or decreases the rotation speed of the spiral rotating body according to the inflow amount of grain, high speed rotation speed setting circuit that switches to the high speed rotation state regardless of the inflow amount of grain per unit time, arbitrary rotation A discharge device for residual grains in an automatic grain sorting and weighing machine, characterized by comprising a changeover switch for switching between a speed setting circuit and a high-speed rotation speed setting circuit.