JPH0763682B2 - 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. It relates to a weighing machine.

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.

However, the amount of grains supplied from the huller or the like to the moving / sorting device per unit time, that is, the inflow amount,
It is the actual situation that the amount of grains that are sorted and flow out also fluctuates greatly at all times. When the amount of retained grains is large, the selection rate is significantly reduced, and the load on the spiral rotor is excessive. On the contrary, when the amount of retained grains is small, the selection rate is high. The load on the spiral rotor is too small and the power loss increases.

Further, as described above, since the inflow amount and outflow amount of the grain per unit time fluctuate, it is impossible to arbitrarily set a desired selection rate while maintaining a predetermined retention amount, It is also a problem that it is not possible to obtain a selected grain having a required quality depending on the use of the grain.

In view of such various problems of the related art, the present invention provides a moving and sorting device based on an increase in weight per unit time measured by a weight scale when the storage bags are filled with the sorted grains by a certain weight. The predicted inflow amount of grains per unit time flowing into the is calculated, and the spiral rotation is performed via the inverter control means so that the retention amount of grains in the moving sorting device according to the sorting rate of the grains is maintained. By controlling the rotation speed of the body, even if the inflow amount of grain per unit time that flows into the moving sorting device and the amount of grain that is sorted and outflows from the tank always fluctuate significantly, the preset sorting Appropriate selection conditions according to the rate can be obtained Maintaining the retention amount of the grain, so that the work can always be performed smoothly and efficiently, and moreover, the selected grain with the desired selection rate can be accurately obtained Provide automatic sorting and weighing machine for grain It is an object of the present invention.

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

That is, No. 1 is equipped with a moving sorting device consisting of a sorting net cylinder and a spiral rotator for granularly sorting the grain after hulling, and a tank for storing the grains sorted by the moving sorting device, and flows out from the tank. In an automatic grain sorting and weighing machine that weighs the sorted grains by a certain weight in a weighing machine and fills them in a storage bag, the amount of increase in the weight per unit time measured by the weighing scale flows into the moving sorting device. Inflow amount detecting means for calculating the predicted inflow amount of grain per unit time, inverter control means for controlling the rotation speed of the electric motor for driving the moving and sorting device, and grain in the moving and sorting device according to the sorting rate of the grain. Selection rate setting means for setting the retention amount of the grain, and an inverter according to the predicted inflow rate per unit time detected by the inflow rate detection means so as to maintain the retention rate of the grain set by the selection rate setting means control It is obtained by the automatic sorting weighing machine of grain, characterized by being configured with a drive control means for controlling the stage.

Further, as No. 2, the tank for storing the selected grains is provided with a shutter for switching the grains discharge port to full open or half open, and the amount of increase in weight per unit time measured by a scale is increased. From the inflow amount detecting means for calculating the predicted inflow amount of the grain per unit time from the function of storing the inflow amount data on condition that the shutter is fully opened and the grain is not stored in the tank, When the outflow state of the stored grains in the tank or the half-open state of the shutter is provided, a function of outputting the data of the inflow amount stored last time is provided.

Operation Since the automatic grain sorting and weighing machine according to the present invention is configured as in the above-mentioned No. 1, the predicted inflow amount of grain per unit time flowing into the moving sorting device is determined by the inflow amount detecting means. The selection rate of the grain, which is calculated based on the amount of increase in the weight per unit time measured by a weight scale when the storage bags are filled with the selected grains by a certain weight, and which is preset by the selection rate setting means. Accordingly, the rotation speed of the spiral rotator is controlled by the drive control means through the inverter control means so that an appropriate amount of grain stays in the moving and sorting device. For this reason, an appropriate amount of grains according to the set sorting rate is always retained in the moving sorting apparatus, and the sorted grain with the desired sorting rate is obtained.

Particularly, in the case of the configuration of the above-mentioned No. 2, the inflow amount is accurately calculated immediately after the shutter is fully opened and even when the shutter is half opened.

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 automatic grain sorting and weighing machine is provided with an automatic control device shown in FIG. This automatic control device is configured as follows. That is, 13 is an inflow amount detecting means, and this inflow amount detecting means 13 is a grain amount per unit time flowing into the moving and sorting apparatus 1 from an increment amount of grain amount measured by the weight scale 12 per unit time. Is a microcomputer for calculating the predicted inflow amount of the inflow amount, the inflow amount is calculated under the condition that the automatic shutter 9 is fully opened and the grain is not stored in the tank 8, and the data of the inflow amount is stored. When the memory function to be performed and the outflow state of the stored grains in the tank 8 or the automatic shutter 9 is in the half-open state (including not only the half open state of the full open state but also an appropriate open state smaller than the full open state) It has a function to output the stored inflow data. A weighing value signal from the weighing scale 12 is input to the inflow amount detecting means 13 from the weighing scale 12 via the amplifier 14 and the A / D converter 15. Reference numeral 16 is a weight display for digitally displaying the input weight value, and 17 is an inflow quantity display for digitally displaying the calculated inflow quantity. Reference numeral 18 is an inverter control means, and the inverter control means 18 controls the rotation speed of the electric motor 5 for driving the spiral body 4 of the moving and sorting apparatus 1. 19 is a selection rate setting means, 20 is a drive control means, and the drive control means 20 includes the inflow amount detection means 13 to the D / A converter 21 and the amplifier 2.
The signal of the inflow amount of the grain per unit time is input via 2, and the signal of the retention amount of the grain in the moving and sorting device 1 according to the sorting ratio of the grain is input from the sorting ratio setting means 19. hand,
The drive control means 20 controls the inverter control means 18 so that the retention amount of the grain in the moving and sorting apparatus 1 is maintained at a set value. Reference numeral 23 is a control frequency indicator of the inverter control means 18. Reference numeral 24 is an operating solenoid of the automatic shutter 9, and 25 is a relay.

In the automatic grain sorting and weighing machine configured as described above, the predicted inflow amount of the grain per unit time flowing into the moving sorting device 1 is determined by the inflow amount detection means 13 to have a fixed weight of the sorted grain. Calculated on the basis of the amount of increase in the grain per unit time, which is weighed by the weight scale 12 when filling the storage bag a one by one, and moved and sorted according to the sorting rate of the grain preset by the sorting rate setting means 19. In order to retain an appropriate amount of grain in the device 1,
The drive control means 20 controls the rotation speed of the spiral rotator 4 via the inverter control means 18. For this reason, since an appropriate amount of grain is always retained in the moving sorting device 1 according to the preset sorting rate, it is possible to accurately obtain the sorted grain with the desired sorting rate.

In the calculation of the inflow amount in the inflow amount detection means 13,
Immediately after the automatic shutter 9 is fully opened, the grains stored in the tank 8 flow out. Further, when the automatic shutter 9 is half opened (small input), the shutter 9 is fully opened and the tank 8 is opened.
The previously stored inflow data when no grains are stored in is output to the memory, and the previous inflow data is stored again in the memory. Accurate calculation and proper control are performed. Note that, even when the automatic shutter 9 is closed during the exchange of the storage bag a, the data of the previous inflow amount is output and stored again, so that an appropriate control state is maintained during this period.

FIG. 4 shows a flowchart of the above operation.
In this flowchart, the value of 3000 Kg / h is the hourly outflow amount of the preset grain that determines that the grain is not stored in the tank 8 and the inflow amount of 900 Kg / h is the set inflow amount that is the operation reference. is there.

Advantageous Effects of Invention According to the automatic grain sorting and weighing machine according to claim 1 of the present invention, the inflow amount of the grain per unit time flowing into the moving sorting device and the grain sorting out from the tank. Even if the amount of fluctuates constantly changes, it is possible to maintain the amount of staying of the grain that can obtain suitable sorting conditions according to the preset sorting rate, and always obtain the grain with the desired sorting rate.

In particular, according to the configuration described in claim 2, the predicted inflow amount with high accuracy is calculated even immediately after the shutter is fully opened and the shutter is half-opened, and the control accuracy can be further improved.

[Brief description of drawings]

The drawings show one 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 automatic control. FIG. 4 is a block diagram showing the circuit configuration of the apparatus, and FIG. 4 is a flowchart showing the control operation. DESCRIPTION OF SYMBOLS 1 ... Moving / sorting device, 3 ... Sorting mesh body, 4 ... Spiral rotating body, 5 ... Electric motor, 6 ... Supply hopper, 7 ... Graining / sending and discharging port, 8 ... Tank, 9 ... Automatic shutter , 10 ... Discharge port, 12 ... Weight scale, 13 ... Inflow amount detection means, 18 ... Inverter control means, 19 ... Sorting ratio setting means, 20 ... Drive control means

Claims (2)

[Claims] 1. A sorting outflow from a tank, which comprises a moving sorting device composed of a sorting mesh cylinder for sorting grain after grain hulling and a spiral rotator, and a tank for storing the grain sorted by the moving sorting device. In an automatic sorting and weighing machine for weighing the weighted grain with a weighing machine in a fixed weight and filling it into a storage bag, the unit that flows into the moving sorting machine from the increase in the weight per unit time measured by the weighing scale. Inflow amount detection means for calculating the predicted inflow amount of grains per time, inverter control means for controlling the rotation speed of the electric motor for driving the moving and sorting device, and grains in the moving and sorting device according to the sorting rate of the grains Selection rate setting means for setting the retention amount of the above, and inverter control according to the predicted inflow rate per unit time detected by the inflow rate detection means so as to maintain the retention rate of the grain set by the selection rate setting means. Control means Automatic sorting weighing machine of grain, characterized by being configured with a drive control means for. 2. The tank for storing the selected grains has a shutter for switching between full-opening and half-opening at its grain discharge port, and the increase in the weight per unit time measured by a scale is used. The inflow amount detecting means for calculating the predicted inflow amount of the grain per unit time has a function of storing the inflow amount data on condition that the shutter is fully opened and the grain is not stored in the tank, and the tank 2. The automatic sorting and weighing of grains according to claim 1, further comprising a function of outputting data of the inflow amount stored last time when the stored grain outflow state or the shutter is in the half open state. Machine.