JPS61190401A - Rice bran bagging automatic weighing method and device thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to an automatic measuring method and apparatus for bagging rice bran.

Conventional technology When automatically weighing rice bran bags, the conventional self-weighing device stores the rice bran in a rice bran tank and discharges the rice bran into a weighing hopper using a discharging machine installed at the bottom of the tank. A constant flow rate is supplied into the bag by a volumetric quantitative feeder that is activated by a signal from an automatic weighing machine.

Measurement is performed by automatically stopping the supply and interrupting the flow when a predetermined weight is reached, which has the disadvantage that measurement is unstable and a large amount of error is likely to occur.

Problems to be Solved by the Invention It is an object of the present invention to provide a method and apparatus capable of automatically weighing rice bran stably and accurately in accordance with the unique properties of rice bran.

Means for Solving the Invention The inventor observed and researched the state of automatic weighing of rice bran and found that the cause of the measurement error was that rice bran is highly compressible and its bulk density changes extremely when compressed. When a large amount of rice bran accumulates in a tank, the degree of partial compression changes depending on the position due to the rice bran's own weight, resulting in deviations in porosity and uneven bulk density.With the bulk density remaining uneven, volumetric fixed quantity supply is performed. As a result of continuous automatic weighing with a machine, it was found that the supplied weight varied, and the fluidity became unstable due to changes in bulk density, which caused the flow rate of rice bran to become irregular.

This invention is based on the above knowledge, and a rice bran bulk density equalizing machine is provided between a weighing hopper that supplies rice bran supplied from a rice bran tank to an automatic weighing machine and an automatic weighing machine, so that the rice bran is always uniform in bulk density. The rice bran is supplied dropwise to an automatic measuring device as a stable rectified flow at a constant flow rate, and after the rice bran is first weighed in a bag at a weight lower than the predetermined weight, the accumulated rice bran is vibrated to disintegrate and flow, and the amount of rice bran is adjusted to a minute amount. This was solved by performing secondary measurements.

When the rice bran is discharged from the rice bran tank, there is a large difference in bulk density from a fluffy tower-like state to a caked nodule-like state.

This invention uses rice bran whose bulk density is uneven due to partial deviations in compressibility due to the rice bran's own weight depending on its position in the rice bran tank, to be processed by rotating a coarse crusher and a fine crusher agitator installed in a bulk density equalizer. Then, loosen it to a fluffy state with high porosity to equalize the bulk density.

Moreover, after this process, the rice bran is pressurized and compressed so that the bulk density does not change and the rice bran is supplied and dropped into the bag on the automatic weighing machine in a stable, constant flow state with no variation. be.

In addition, after performing the primary weighing in which rice bran is weighed in advance into a bag to an amount less than a predetermined weight, the rice bran accumulated in the weighing chamber is broken up by the vibration of a vibrator through the gap where the on-off valve is slightly opened, and the rice bran is continuously weighed. This method further reduces measurement errors by performing secondary metering in which a stable minute flow rate is supplied dropwise and minute amounts are adjusted.

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

A predetermined flow rate of the rice bran in the rice bran tank 1 is discharged into a weighing hopper 3 by a scraping machine 2 which is operated by a weighing operation signal attached to an automatic weighing machine 19, and is supplied to a bulk density equalizing machine 4.

The bulk density equalizer 4 includes a coarse crusher 6 which is coaxially rotated by a main shaft 1) of a brake motor operated by a signal from an operation panel 20 inside an outer box 5. Fine stirrer 7, constant flow screw 8. Discharge machine 10. and constant flow screw 8 and ejector 1
The adjustment chamber 9 has a predetermined volume between 0 and 0.

While the rice bran supplied from the weighing hopper 3 falls through the crusher 6, the rotation of a large number of crushing rods provided in the crusher 6 crushes the lumps produced in the rice bran tank 1, crushes and stirs the rice bran, and crushes it into fine particles. The fine stirrer 7, which has a large number of needle-shaped steel wires implanted radially into the rice bran, pulverizes the rice bran by rotation, stirs it, and loosens it into a fluffy state with a high porosity to reduce the bulk density. Constant flow rate IJ is always in a stable and uniform state.

=8 Falling blind on top.

The rice bran is compressed during transportation and the bulk density does not change.
By rotating at a constant speed, the rice bran is dropped into the adjustment chamber 9 as a constant flow rectification.

The fallen rice bran is discharged into the weighing rice bran chamber 14 from the communication port 13 that opens when the discharger equipped with radial blades rotates 100 times, but the discharge capacity of the discharger 10 is larger than the transfer capacity of the constant flow screw 8 and is normal. Rice bran does not stay in the adjustment chamber 9, but if the flow rate changes temporarily and a large amount of rice bran is supplied, such as when rice bran lumps are discharged from the scraper 2, the rice bran will temporarily stay in the adjustment chamber 9. The outer shape of the measuring rice bran chamber 14 is formed by an outer box ↓ of an integral structure into which the rice bran is pressure-opened by the constant flow rate screw 8 after the bulk density is equalized and the flow rate is adjusted. , an on-off valve 16 for opening and closing the downstream port 15, a valve actuator 17 for operating the on-off valve 16, and a vibrator 18 are provided.

Scraping machine 2. Valve actuator 17 along with plage motor 12
The vibrator 18 is automatically operated by operating a weighing operation panel 20 attached to the automatic weighing machine 19. (Electrical wiring is omitted from the drawing) The primary measurement is done by drawing machine 2. The inside of the bulk density equalization machine is activated, and the vibrator 18 and the on-off valve 16 are not activated and the discharge port 1 is not activated.
5 is in a state where the entire surface is opened, and the rice bran in the rice bran tank 1 is discharged in a fixed amount by the scraping machine 2 and supplied to the bulk density equalization device, so that the bulk density is equalized and a stable constant flow rate is maintained. As the discharging machine 10 rotates, the bran flows through the measuring chamber 14 and flows from the outlet 15 into the bag 21 on the automatic weighing machine 19, where it is filled and measured.

When a predetermined weight is reached, the weighing operation panel 20 automatically operates the scraper 2. The bulk density equalization machine is stopped to complete the primary measurement, and the valve actuation machine 17. The vibrator 18 is activated, the on-off valve 16 is opened at predetermined intervals, and secondary metering (indicated by dotted lines in the drawing) is started.

At the end of the primary measurement, the rice bran remaining in the weighing bran chamber 14 breaks down due to the vibration of the vibrator 18, and vibrates and flows, resulting in a continuous minute amount from the opening of the flow outlet 15 in a stable state with no variation. and flows down into the bag 21.

When the inside of the bag 21 reaches a predetermined net weight, the weighing operation panel 20 automatically closes the on-off valve 16 and stops the vibrator 18, and the secondary weighing for micro-adjustment is completed, and the first weighing for one bag is completed. The process is completed.

Automatically weigh continuously by repeating sequentially.

Effects This invention makes rice bran which is highly compressible and has uneven bulk density discharged from the rice bran tank 1 equalize the bulk density and meter it into the bag 21 at a stable constant flow rate without variation. This reduces measurement errors and makes it possible to accurately measure bulky compressible powders such as rice bran.
In addition, it is possible to carry out secondary weighing of minute amounts using a simple method for measuring rice bran using vibration flow, thereby making it possible to measure rice bran more accurately.

[Brief explanation of drawings]

The drawing shows a cross-sectional view of the device in which a part of the essential part of the present invention is cut away.

Claims (4)

[Claims] (1) A bulk density equalizer is installed between the weighing hopper that supplies the rice bran discharged from the rice bran tank to the automatic weighing machine and the automatic weighing machine, and depending on the position in the rice bran tank, the rice bran's own weight will partially compress the rice bran. Rice bran bagging characterized by supplying rice bran, which has uneven bulk density due to a deviation in flow, at a stable constant flow rate with uniform bulk density into a bag on an automatic weighing machine. Automatic weighing method. (2) After carrying out the primary measurement in which the supply of rice bran is stopped when the rice bran is placed in a bag on the automatic weighing machine at a weight slightly less than the predetermined weighing weight, the on-off valve provided in the weighing rice bran chamber is slightly opened, and the rice bran is weighed. Claim 1, characterized in that the rice bran remaining in the room is broken down by the vibration of a vibrator, and a minute amount is continuously dropped to adjust the minute amount supplied into the bag. Automatic measuring method for bagging rice bran. (3) Between the weighing hopper that supplies the rice bran discharged from the rice bran tank to the automatic weighing machine, and the automatic weighing machine, depending on the position in the rice bran tank, the weight of the rice bran causes a partial deviation in the degree of compression, resulting in a change in bulk density. The uneven rice bran is processed through a coarse crusher that rotates coaxially inside the outer box, a fine crusher, a constant flow screw, a discharge machine,
and an automatic rice bran bagging and measuring device, characterized in that a bulk density equalizer with an adjustment chamber is provided between a constant flow rate screw and a discharger. (4) A measuring rice bran chamber equipped with an on-off valve, a valve actuator, and a vibrator that is automatically operated by the measuring operation panel attached to the automatic weighing machine to perform secondary weighing for micro-adjustment after performing the primary measurement. An automatic rice bran bagging and measuring device according to claim 3, characterized in that: