JPS6112756B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention disperses grains supplied to one end of a sorting plate by the swinging motion of this sorting plate, and separates them into brown rice, paddy, etc. from the other end of the sorting plate. In an oscillating sorter that is configured to take out grains on the sorting plate, the grains formed on the sorting plate are controlled so that the grains are distributed over the entire surface of the sorting plate as much as possible. The present invention relates to a grain layer detection device for detecting layers.

When using a detector such as a phototube to detect the thickness of the grain layer, control operations are extremely convenient, but the lens that covers the light emitting and receiving surfaces has a
Fine dust, such as soil powder and paddy flour, that fly up from the grains during the sorting operation tends to adhere to the grains, and for this reason,
It is well known that as the amount of emitted light and the amount of received light decreases, the detector tends to operate inaccurately, and this requires laborious work such as constantly wiping the lens manually.

Therefore, in this invention, the detector is attached to the sorting plate by being embedded in the grain layer formed on the sorting plate, and the grains forming this grain layer are constantly flowing during the sorting operation. Therefore, due to the flowing movement of the grains, the lens surface of the detector is constantly wiped, resulting in so-called self-cleaning, which eliminates the risk of dirt on the lens surface and eliminates the need for cleaning work. Moreover, it has been devised so that the detector always operates correctly.

To explain one embodiment, the swing type sorter illustrated in FIG.
1b... was attached to the swinging frame 2, and the lower swinging arms 7, 7 were pivotally supported to the sorting machine frame 20 by the swinging fulcrum shaft 5, and were made to be able to rise and fall freely by the worm mechanism 4. Swinging fulcrum shaft 2 at the top of the bending links 21, 21
2 and 22 pivot the rear swinging arms 23 and 23, and the swinging frame 2 is connected to the lower swinging arms 7 and 7 by the lower brackets 25 and 25. ,
Further, by pivotally supporting high-level swinging arms 23, 23 with high-level brackets 25, 25, respectively, and rotating a rotary wheel 27 with an electric motor 6 via a transmission mechanism 26, a known swing mechanism can be used. Then, the lower swinging arms 7, 7 are moved together with the swinging frame 2 around the swinging fulcrum shaft 5 to swing the sorting plates 1a, 1b... in the left-right direction in the figure, and one end of the sorting plates 1a, 1b... The grains supplied from the sorting plates 1a, 1b, etc. are dispersed and brown rice is sorted from the higher side of the sorting plates 1a, 1b, and paddy is sorted from the lower side of the sorting plates 1a, 1b. By driving the worm mechanism 4 through the adjustment shaft 8, the upright angle of the bending links 21, 21 is changed, and the swing fulcrum shaft 23 is raised or lowered, thereby adjusting the inclination angle of the sorting plates 1a, 1b... The inclination angle is adjusted so that the grains can be dispersed over as wide a range as possible on the sorting plates 1a, 1b. and,
As shown in FIG. 1, for example, a high-level detector 9 is provided that can detect the presence or absence of the grain layer 8h in the vicinity of the high-level side plate 11a of the uppermost sorting plate 1a, and also in the vicinity of the low-level side plate 12a of the same sorting plate 1a. grain layer 8l
A low-level detector 19 is provided that can detect the presence or absence of the 19, there is a grain layer 8 nearby
When grain layers 1 and 8h are present, it is attached to the sorting plate 1a at a position where it will be buried in the grain layers 8l and 8h during the sorting operation. Then, as shown in the block diagram in Fig. 2, a high-level detector 9
The output signal from the detector 19 and the output signal from the low-level detector 19 are connected to be input to the comparison control unit 10, and the sorting action on the sorting plates 1a, 1b, etc. is performed normally, and the high-level side plate 11a and the low-level side plate 12a are connected. When the grain layers 8h and 8l are both present near each of the detectors 9 and 19, no command is issued from the comparison control section 10 that receives the output from the respective detectors 9 and 19, so the tilt drive section 13 does not operate. and high side plate 1
When the grain layer 8h that should exist near the high side plate 11a is not present near the high side plate 11a and the grain layer 8l exists near the low side plate 12a, the brown rice layer that should exist near the low side plate 1a is shifted to the lower side. The comparison control unit 10 receives only the output signal from the detector 19, and as a result, the inclination drive unit 13 receives a command from the comparison control unit 10 to reduce the tilt angle. The portion 13 is configured to drive the worm mechanism 4 via the adjustment shaft 3 to reduce the inclination angle of the sorting plates 1a, 1b, . . . by a certain amount.

The positions where these detectors are installed are the same as the first one above.
The present invention is not limited to the embodiment shown in the figure, but as shown in FIG. Low level detectors 39 are provided at low positions near the side plate 12a, and the level of the grain layer 8l in the vicinity of the low side plate 12a is detected by these high and low level detectors 39. However, as in the first embodiment described above, since the output signal from the high-level detector 29 and the output signal from the low-level detector 39 are connected to be input to the comparison control unit 10, the selection board 1a, 1b
...When the upper sorting action is performed normally, the grain layer 8l exists near the lower side plate 12a at a position that can only be detected by the lower detector 39,
Comparison control section 10 receives output from this detector 39
Since no command is issued from , the tilt drive section 13 does not operate, and for example, the lifting and sorting function deteriorates and the brown rice layer that should be present near the high side plate 11a is shifted to the lower side. When the grain layer 8l becomes too thick near the lower side plate 12a, both the upper and lower detectors 29, 39 will give an output to the comparison control section 10, and as a result, the inclination angle Control is performed so that a command to reduce the grain layer is given to the tilt drive unit 13. On the other hand, when the grain layer is not detected by the two upper and lower detectors 29, 39, the dispersion operation is incomplete. , the tilt drive unit 13 is configured to operate in a direction that increases the tilt angle of the tilt plates 1a, 1b, . . . Of course, the position where the upper and lower detectors are installed is not limited to the side wall part as in the illustrated example, but in short, any position where the upper and lower detectors can be installed is not limited to the side wall portion, but may be any position where they can swing together with the sorting plate and be embedded in the grain layer on the sorting plate. This is in accordance with the purpose of this invention.

As described above, the grain layer detection device of the present invention is a rocking grain sorter equipped with a sorting plate that separates grains supplied to one end by a rocking motion and discharges them from the other end. In this method, a photoelectric detector for detecting the grain layer formed on the sorting plate during the above-mentioned dispersion operation is attached to the sorting plate so as to be embedded in this grain layer. The detector directly detects the state of grain dispersion on the sorting plate where grains are being separated, so the control operation based on this detector is extremely accurate and immediately responds to the dispersion state on the sorting plate. The sorting operation can be efficiently performed over a wide range of the sorting plate surface.

The photoelectric detector, which is embedded in the grain layer where the sorting operation is being performed, performs a detection operation without fail depending on the presence or absence of the grain layer, so its operation is accurate. There is no case where a detection operation is not performed even though a grain layer is present. And because the grains constantly collide with the lens surface of the detector due to the sorting flow operation, the dust generated from the grain layer no longer attaches to the detector, and the detector is always in a self-cleaning state. This eliminates the need for any trouble such as wiping the lens, and allows a predetermined amount of light to be emitted or received at all times, making the detection operation always accurate, which is particularly effective in achieving complete automation of sorting machine control. It is.

[Brief explanation of the drawing]

The figures show embodiments of the present invention, and FIGS. 1 and 3 are longitudinal sectional front views of main parts of the oscillating grain sorter in each embodiment, and FIG. 2 shows a control circuit of the invention. It is a block diagram. Explanation of symbols, 1a, 1b... Sorting plate, 2... Rocking frame, 3... Adjustment shaft, 4... Worm mechanism,
5, 22... Swinging fulcrum shaft, 6... Electric motor, 7, 2
3... Swinging arm, 8h, 8l... Grain layer, 9,
19, 29, 39...detector, 10...comparison control section, 11a...high side plate, 12a...low side plate,
13... Inclination drive unit, 14... Power supply, 20... Sorting machine frame, 21... Refraction ring, 24, 25...
Bracket, 26... Transmission mechanism, 27... Rotating wheel.

Claims (1)

[Claims] 1. In a swinging grain sorter equipped with a sorting plate that separates grains supplied to one end by a swinging motion and discharges them from the other end, grains formed on the sorting plate during the separating operation are Grain layer detection in an oscillating grain sorter, characterized in that a photoelectric detector for detecting the grain layer to be removed is attached to a sorting plate so as to be buried in the grain layer. Device.