JPH0436745B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention includes, for example, a pair of unrollers that separate paddy into brown rice and rice husks, and an unloading mechanism that controls unloading between the rolls, and takes out a mixed rice of brown rice and paddy. Regarding rice hulling machine. Previously, Utsukai Showa 57-
As shown in Publication No. 12232, there is a technology that uses a sensor to detect mixed rice after hulling and wind selection.

However, since the above-mentioned prior art directly detects the mixed rice that moves in layers, there are problems with detection accuracy, such as the inability to easily perform accurate detection.

Therefore, a technology was developed to take a part of the mixed rice as a sample and identify and count each grain of paddy and brown rice, but since the paddy and brown rice were detected by sensors as they flowed down the flow path, dust Also, there were problems in terms of maintenance and durability, such as the detection part in the middle of the flow path becoming dirty due to rice bran, etc., and the detection accuracy tending to decrease.

However, the present invention provides a sample gutter through which the paddy and brown rice taken out as a sample from the mixed rice from the de-rolling process, and a sensor that identifies and counts each paddy and brown rice grain by grain are provided. The present invention is characterized in that the sensor is installed at a position where the paddy and brown rice can be detected after flowing out, and the sensor detects the paddy and brown rice in the air while they are falling.

Therefore, only paddy or brown rice is detected by the sensor, which makes it easier to simplify maintenance and improve durability compared to conventional methods, and to stably obtain high detection accuracy over a long period of time. At the same time, the probability that paddy or brown rice will be detected at intervals is much higher than before, and paddy and brown rice can be identified and counted more clearly and accurately than before.

An embodiment of the present invention will be described below in detail with reference to the drawings. Fig. 1 is an overall cross-sectional view of the huller, and Fig. 2 is a partial cross-sectional view of the same. 3 is a shutter that changes the amount of paddy being fed out by the roll 2; 4 is a screw that adjusts opening and closing of the shutter 3; 5 and 6 are disposed below the feeding roll 2 to release the paddy; A pair of de-rolls separates the rice into brown rice and rice husks, and 7 removes the pressure (load) from each roll 5 and 6 by bringing the variable-side de-rolling 5 supported via a link 8 into contact with and separating from the fixed-side de-rolling 6. 9 and 10 are falling chute provided below the rolls 5 and 6 to form a mixed rice flow outlet 11; 12 is a support shaft 18 on the inclined upper end side;
A grain board 14 is attached to allow the grain flow angle to be changed freely around the flow port 11, and a winnower 14 is used to suck and discharge straw waste such as rice husks that fall from the flow port 11 onto the grain board 12 through a sorting air passage 15 to the outside of the machine. Fan 16 is the grain board 12
It is a mixed rice take-out hopper that feeds the mixed rice of brown rice and paddy falling from the grain to the grain lifting cylinder 17, and
2, the mixed rice is continuously taken out.

Further, in the figure, reference numeral 18 is a reflection plate that is a deceleration member that is disposed opposite to the lower end of the grain flow board 12 and brings the flowing mixed rice into contact with it, and reference numeral 19 is a sample extraction plate that is connected to the center of the lower end of the flow grain board 12. A chute 20 is a sample gutter 2 that receives the mixed rice flowing down the grain plate 12 and the upper surface of the chute 19 after contacting the reflecting plate 18.
1 is a photoconductive grain sensor that irradiates detection light onto the mixed rice falling from the sample gutter 20, receives the reflected light, and detects the amount of reflected light from the mixed rice; 22
is a sample take-out hopper that feeds the mixed rice detected by the sensor 21 to the frying cylinder 17;
As shown in FIG. 3, the sample gutter 20 is fixedly supported on the upper part of the hopper 22 via a bracket 23, and the sensor 21 is attached to a support arm 24 whose one end is connected and fixed to the bracket 23.

Furthermore, as shown in FIGS. 4 to 7, the end surface of the sample gutter 20 is formed into a V-shape, and the gutter 2
A small reduction gear part 20a with a small inclination angle (A) on the upper end side of the inclination of 0
, the speed increasing part 2 with a large inclination angle (B) is placed on the lower end side of the inclination.
0b, and a convex curved part 20c connecting each part 20a, 20b in the middle thereof, and the V-shaped groove width (l1) of the speed increasing part 20b is larger than the V-shaped groove width (l1) of the speed reducing part 20a. The width (l2) is formed to be large, and the grain interval (H2) flowing down the speed increasing part 20b is configured to be larger than the grain interval (H1) flowing down the speed increasing part 20a.

The detection part 21a of the grain sensor 21 is located diagonally above the lower end of the sample gutter 20, and the difference in grain length (D1) (D2) of the brown rice 25 and paddy 26 immediately after flowing out from the sample gutter 20 (D1 :D2＝
2:3) and the amount of reflected light from the unpolished rice 25 and paddy 26. As shown in Figure 8, the detection time (T1) and the amount of reflected light voltage (V1) of the unpolished rice 26 are 25 detection time (T2) and reflected light amount voltage (V2), and the detection time (T1) (T2) and reflected light amount voltage (V1)
(V2) is formed so that it is detected by the sensor 21 as a deformed grain when it is inconsistent with the paddy 26 and brown rice 25.

As is clear from the above, there is a sample gutter 20 through which the paddy and brown rice taken out as a sample from the mixed rice from the de-rolls 5 and 6 flows down, and a sensor 21 which identifies and counts the paddy and brown rice one by one. At the same time, the sensor 21 is installed at a position where it can detect the paddy and brown rice after flowing out from the sample gutter 20, and the sensor 21 is configured to detect the paddy and brown rice in the air while they are falling.

In addition, Fig. 9 is an escape rate control circuit diagram, and the brown rice detection time (T2) is determined according to the grain length (D1) of brown rice 25.
A brown rice time setting device 27 that adjusts the brown rice time setting device 27, a brown rice voltage setting device 28 that adjusts the brown rice detection voltage (V2) according to the amount of reflected light of the brown rice 25, and an output of the grain sensor 21 and each setting device 27, 28, respectively. It is equipped with comparators 29 and 30 for comparison and a brown rice detector 31 that detects brown rice based on the output of each comparator 29 and 30, and is configured to detect brown rice discharged from the sample gutter 20.

Furthermore, a paddy time setting device 32 that adjusts the paddy detection time (T1) according to the grain length (D2) of the paddy 26;
a paddy voltage setting device 33 that adjusts the paddy detection voltage (V1) according to the amount of reflected light of 6; comparators 34, 35 that compare the outputs of the grain sensor 21 and each setting device 32, 33, respectively; ,35
The paddy detection circuit 36 detects paddy based on the output of the sample gutter 20, and is configured to detect paddy released from the sample gutter 20.

Next, a sample time setting device 37 for adjusting the detection time of mixed rice and paddy by the grain sensor 21, counters 38 and 39 for counting brown rice and paddy within the mixed rice detection time of the setting device 37; A yield calculation circuit 40 that calculates a yield rate based on the brown rice number output and the paddy number output of each counter 38 and 39
and a generating diode type display 42 that displays the escape rate via a drive circuit 41 based on the escape rate output of the circuit 40, and displays the escape rate at regular intervals based on the setting device 37. It is composed of

Also, the derolling 5 by the air cylinder 7,
Evacuation rate setting device 43 for adjusting the depressurization reference value of No. 6
and each of the counters 38, 39 and their setting device 4.
3, and outputs depressurization rise and fall signals by comparing the outputs of the air cylinders 3 and 3. The system is configured to control the operation based on the following.

The present invention is constructed as described above, and the dried paddy flowing down from the supply hopper 1 is de-processed by the de-rolls 5 and 6, and at the same time
Straw waste such as paddy grains falling onto the grain board 12 is sucked out of the machine by a winnowing fan 14, and the mixed rice of brown rice and paddy that falls onto the grain board 12 from the flow outlet 11 is taken out from the hopper 16. and the sample removal chute 19.
The mixed rice that comes into contact with the reflector 18 from sample gutter 2
0 upper end, and discharges the mixed rice from the lower end of the gutter 20 so as to have a grain interval (H2),
Each grain of the mixed rice is detected by the grain sensor 21, and a counter 38,
39 counts the number of grains of paddy and brown rice within a certain period of time, and displays the shedding rate through the shedding rate calculation circuit 40 and display 42, and the shedding rate adjusting circuit 44.
The electromagnetic solenoid 45 is actuated via the air cylinder 7, and the air cylinder 7 is driven and controlled to change the depressurization of the derolls 5 and 6, thereby keeping the depressurization rate substantially constant.

It should be noted that it is also possible to use a reversible electric motor (not shown) in place of the air cylinder 7, and to adjust the gap between the roll-off rolls 5 and 6 to keep the roll-off ratio substantially constant.

As is clear from the above embodiments, the present invention provides a sample gutter 2 through which paddy and brown rice taken out as a sample from part of the mixed rice from the unrolled rice 5 and 6 flow down.
0 and a sensor 21 that identifies and counts paddy and brown rice one by one, and the sensor 21 is installed at a position where it can detect the paddy and brown rice that have flowed out from the sample gutter 20, and the sensor 21 is installed at a position where it can detect the paddy and brown rice that are falling in the air. The sensor 21 is configured to detect brown rice, and only paddy or brown rice is detected by the sensor 21, making it easier to simplify maintenance and improve durability compared to the conventional method. This makes it possible to stably obtain high detection accuracy over a long period of time, and the probability that paddy or brown rice is detected at intervals is much higher than before, making it possible to identify and count paddy and brown rice. can be detected more clearly and accurately than before.

[Brief explanation of drawings]

FIG. 1 is an overall sectional view showing an embodiment of the present invention;
Figure 2 is a partial sectional view, Figure 3 is a front view of main parts, and Figure 4 is a partial sectional view.
The figure is a plan view of the sample gutter, Figure 5 is a side view of the same cross section, Figures 6 and 7 are end views of the same cross section, Figure 8 is the output diagram of the grain sensor, and Figure 9 is the evasion rate control circuit. It is a diagram. 21... Grain sensor.

Claims (1)

[Claims] 1. The sample gutter 20 is provided with a sample gutter 20 for flowing down paddy and brown rice taken out as a sample of the mixed rice from the de-rolls 5 and 6, and a sensor 21 for identifying and counting each grain of paddy and brown rice. The rice hulling machine is characterized in that the sensor 21 is installed at a position where it can detect the paddy and brown rice that have flowed out from the hull, and the sensor 21 is configured to detect the paddy and brown rice that are falling in the air. Measuring device.