JPH04367769A - Control of sorting rate of grain sorter - Google Patents

Abstract

PURPOSE:To automatically control a sorting mechanism so as to set the waste grain race in grain by discriminating the particle size data measured on a whole grain taking-out side using a reference particle size to count up the same and calculating waste grain content using said data and controlling a sorting rate altering means so that the waste grain content becomes set content. CONSTITUTION:The max. value of the particle size measured by a particle size measuring means 2 on a waste grain taking-out side is stored in a judging and memory means 3 as a reference particle size A and the particle size data measured by a particle size measuring means 1 on a whole grain taking-out side is discriminated from whole grain or waste grain using the reference particle size A to be counted up. Waste grain content R is calculated using the counted-up data and a sorting rate altering means 5 is controlled so that the waste grain content R becomes set content. As a result, in a grain sorter sorting grain into large whole grain having a predetermined particle size and small waste grain before taking out the same, a sorting mechanism can be automatically controlled so that the ratio of waste grain contained in the grain discharged on the whole grain taking-out side becomes a desired ratio.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grain sorting machine for sorting grain into regular grains larger than a predetermined grain size and small waste grains.

0002

[Prior Art] Grain is graded higher if it contains less crushed grains with poor taste or immature small grains. A grain sorting machine is used in which grain is supplied and waste grains such as broken grains and immature small grains leak out through a sorting hole in a sorting tube, and large grains are obtained from the other end of the sorting tube. However, if this grain sorter completely removes waste grains and only sorts grains, the yield will be low. For this reason, consideration has been given to sorting to a level of waste grain content that is acceptable for higher grades, and methods for changing the sorting rate have been devised.

For example, Japanese Utility Model Application Publication No. 58-128675 discloses that in a vertical grain sorting machine in which a grain lifting helix is fitted in an upright sorting cylinder, grains are sorted by changing the rotational speed of the grain lifting helix. A technical means is described in which the sorting rate is changed by changing the feed rate. Also, Jikko Sho 63-184
Publication No. 65 describes a technical means that changes the amount of waste grains in the grains that come out of the sorting cylinder as grains by mixing an appropriate amount of waste grains that have been sorted into unsorted grains. There is.

0004

In all of the prior art sorting rate changing means described above, an operator manually operates the sorting rate changing means by looking at the sorting state. Therefore, when the waste grain content of the grains supplied to the sorter changes, it is necessary to operate the sorting rate changing means accordingly. Moreover, by visually observing the sorting state, it cannot be determined whether the sorted grains have a desired waste grain content. Therefore, an object of the present invention is to automatically control the sorting rate changing means by setting the proportion of waste grains contained in sorted grains, that is, the waste grain content rate.

[0005]

[Means for Solving the Problems] In the present invention, in a grain sorter that sorts and takes out grains into regular grains larger than a predetermined grain size and small scrap grains, the grains on the grain side and the scrap grain side are provided. A judgment memory is provided in which particle size measuring means 1 and 2 for measuring the particle size of waste particles are provided, and a particle size value that becomes maximum during a predetermined time or a predetermined amount of measurement with the particle size measuring means 2 of waste particles is stored as a reference particle size A. Means 3 is provided, and by comparing the particle size b measured by particle size measurement means 1 for particle size grading with the reference particle size A, sized particles or waste particles are determined and counted, respectively, and the waste particle content R is calculated. A method for controlling the sorting rate of a grain sorting machine is provided in which arithmetic control means 4 is provided and a control signal is output from the arithmetic control means 4 to a sorting rate changing means 5 to change the sorting rate.

[0006]

[Operations and Effects of the Invention] Grain supplied to the grain sorter is divided into waste grains that leak from the sorting hole of the sorting tube and sized grains that do not leak out, and are sent out of the machine as waste grains or sized grains, respectively. taken out. Particle size measuring means 1 and 2 are provided to measure the grain size of the grains on the waste grain side and the grain size regulating side.
The maximum value (which is approximately equal to the diameter of the sorting hole in the sorting tube) among the particle size data obtained during the measurement for a predetermined time or a predetermined amount is set as a reference particle size A, and is processed and stored in the judgment storage means 3. Based on the particle size A, the particle size data measured by the particle size measuring means 1 on the particle size regulating side is determined by the arithmetic control means 4 as to whether it is a particle size particle or a waste particle, and the number of each particle is counted, and after counting for a predetermined time, the particle size is Calculate the grain content R. If this waste particle content rate R is different from the set waste particle content rate, a control signal is outputted from the calculation control means 4 to the sorting rate changing means 5 to change the sorting rate. In this way, the sorting rate is automatically controlled by simply setting the desired waste grain content, which streamlines the work.

[0007]

Embodiments Next, embodiments of the present invention will be described with reference to the drawings. The grain sorting machine of this embodiment is a vertical grain sorting machine as shown in FIG. The grains to be fed into the shell body 6 from the supply chute 9 protruding from the side of the sorting tube 8
The waste grains are guided into the shell body 6 through the sorting hole 34 provided on the circumferential surface of the sorting tube 8, and are lifted up inside the sorting tube 8 by the rotation of the grain lifting spiral 7, and the waste particles are leaked into the shell 6 through the sorting hole 34 provided on the circumferential surface of the sorting tube 8, and the sized particles are sorted. It is discharged from the upper part of the cylinder 8 to a take-out area inside the shell 6, and is further stored in a tank 10 protruding from the outside of the upper part of the shell 6.

A measuring device 11 is installed below the tank 10, and a shutter 14 provided at the outlet 13 of the tank 10 is opened and closed as appropriate to sort the grains into a bag 12 placed on the measuring device 11. The grains are added and packed into bags. On the front side of the tank 10, there is a control device that controls the opening/closing timing of the shutter 14 to determine the amount of bagging, a judgment storage means for storing the maximum particle size as a reference particle size A from waste particle size data described later, and a waste particle content rate. The controller has a built-in arithmetic control means 4 that calculates R and controls the sorting rate, and has a waste particle content setting device 16, various processing condition setting devices, and a display section that displays the bagging weight, waste particle content R, etc. A box 15 is provided.

The sorting rate changing means 5 is provided at the lower side of the shell 6, and as shown in FIG. A duct 20 is provided that communicates with the waste particle receiver 19 provided on the lower outer circumference, and within this duct 20, a reduction passage 21 leading into the particle receiving cylinder 18 and a discharge passage 22 leading to the outside of the shell body 6 are provided. Both aisles 21,
A shutter 24 rotated by a pulse motor 23 is provided at the branching part of 22, and by changing the degree of opening and closing of this shutter 24, the amount of waste grains supplied to the grain receiving cylinder 18 is changed and the sorting rate is changed. Reference numeral 25 is a scraping plate that scrapes away the debris falling onto the debris receiver 19.

The grain size detection means 1 on the grain side is provided on the upper side of the shell 6, and as shown in FIG. A portion of the particles is guided into the particle size detection device 27. Particle size detection device 27
Inside, there is a rotating disk 29 with a concave groove 28 formed on its outer periphery for receiving the grains, and a grain size detection section 30 inserted between the periphery of the disk 29 from above and below detects the grains. The grain size of the grains is measured, and a color detection unit 31 identifies the surface color of the grains to determine green rice, dead rice, etc. The grains in the groove 28 are led into a duct 33 leading into the tank 10 into which it falls at the discharge part 32 .

The particle size detection means 2 on the waste grain side is provided on the upper side of the shell 6, and as shown in FIG. An upper waste particle receiver 35 is provided to guide the particles to the outside of the shell 6, and the waste particles coming out of the shell from the upper waste particle receiver 35 are guided into the particle size detection device 38, and after measuring the particle size, the particles are transferred to the shell 6 through the chute 39. I'm trying to bring it back inside. The particle size detection device 38 includes a light emitting element 36 and a light receiving element 37.
are placed facing each other, and the diameter is measured by the shadow of the debris passing between them. In this example, the particle size measuring means 1 on the grain size measuring side and the particle size measuring means 2 on the waste grain side are provided separately, but the particle size measuring means is set as one and the particle size measuring means 1 is connected to this particle size measuring means as appropriate. It is also possible to send the grains on the grading side or send the grains on the waste side and measure the grain size of each.

The selection rate is controlled as shown in FIGS. 1 and 2. First, a desired waste content is set using the waste content setting device 16 in the control box 15. After that, when the vertical grain sorter starts operating, first, the grain size detection means 2 on the waste grain side collects grain size data for a predetermined time or a predetermined number of grains, and the judgment storage means 3 selects the largest grain size among the grain size data. The value A is determined to be the reference particle size and stored. Next, the diameter b of the grain is measured by the particle size measuring means 1 on the grading side, and the arithmetic and control means 4 compares this particle size data with the reference particle diameter A, and if it is larger than this, it is counted as the grading number. S
The small particles are counted up as the number of waste particles K.

Thereafter, after a predetermined time has elapsed or after predetermined particle size data have been accumulated, the waste particle content R is calculated using the following equation. This waste particle content R is within a predetermined tolerance (for example, 2%)
If it is within the range, the process returns to the measurement of the particle diameter a, and if it exceeds the allowable error, a control signal is sent to the sorting rate changing means 5 to change the degree of opening of the shutter 24, and the process returns to the measurement of the particle size a. In the measurement of the waste particle size a, if particle size data larger than the reference particle size A is measured, it is possible that the sorting hole 34 of the sorting tube 8 has become larger for some reason, so the control box 15 An error message is displayed on the display.

[Brief explanation of drawings]

FIG. 1 is a flowchart diagram showing a control state.

FIG. 2 is a control block diagram.

FIG. 3 is a partial plan cross-sectional view.

FIG. 4 is a partial side sectional view.

FIG. 5 is a partial side sectional view.

FIG. 6 is an overall side view.

[Explanation of symbols]

1 Particle size measurement means 2 Particle size measurement means 3 Judgment memory means 4 Arithmetic control means 5. Sorting rate change means A Standard particle size R Waste grain content a Waste particle size

Claims (1)

[Claims] Claim 1: In a grain sorter that separates and takes out grains into regular grains larger than a predetermined grain size and small waste grains, a grain size that measures the grain size of the grains on the regular grain side and the waste grain side. Measuring means (1
), (2), and a judgment storage means (3) for storing the maximum particle size value during a predetermined time or a predetermined amount of measurement with the waste particle particle size measuring means (2) as a reference particle size (A). established,
By comparing the particle size (b) measured by the size measuring means (1) with the reference particle size (A), it is possible to determine whether the particles are sized or waste, and the waste particles content (R) is determined by counting each particle. The sorting rate control of the grain sorting machine is performed by providing an arithmetic control means (4) for calculating , and outputting a control signal from the arithmetic control means (4) to a sorting rate changing means (5) to change the sorting rate. Method.