JPH0320765Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a dehulling rate detection device for a huller that removes the skin from grains, that is, paddy, to produce brown rice using a pair of derolls.

Conventionally, a sampling disk is provided to take out each grain of grain to be flowed down after deprocessing, and a grain sensor is provided to distinguish the grains taken out by the sampling disk into brown rice and paddy. We have developed a technology to detect this using the sampling disk and grain sensor.

However, in the prior art, the sampling disk is installed substantially perpendicular to the grain flow direction, so the sampling disk cannot be easily installed in the guide passage for taking out the grains after shedding. There are problems in that the disk mounting structure cannot be easily simplified, and the sampling disk tends to act as a flow resistance for grains in the guide passage.

However, the present invention uses a sampling roll that scoops up and extracts each grain that has been removed, and a grain sensor that distinguishes each grain extracted by the sampling roll into brown rice or paddy. The present invention is characterized in that a sampling roll is installed inside the guide passage for taking out the grains after shedding, and the sampling roll is installed inside the guide passage substantially parallel to the direction in which the grains flow down.

Therefore, since the sampling roll is installed inside the guide passage, the structure for attaching the roll and the shape of the guide passage can be easily simplified, and since the sampling roll is installed substantially parallel to the grain flow direction, the sampling roll can There is almost no resistance to the grains flowing down, and the grains can flow down the guide passage better than before.

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

Figure 1 is an overall longitudinal cross-sectional view of the rice huller, and 1 in the figure.
2 is a supply hopper installed at the top of the machine body into which the threshed grains are fed through the wind sorter and dryer; 2 is installed at the lower outlet of the hopper 1 and the internal grains are sequentially discharged downward in a fixed amount. 3 and 4 are left and right main and auxiliary derolling rolls disposed below the feeding roll 2, and 5 is a drop gutter 6 of the derolling rolls 3 and 4 that is opened to release the removed mixed rice downward. A dropping discharge port 7 is for discharging the mixed rice from the discharge port 5 to the outside of the machine via a drain 8, and 9 is a mixed rice guide passage 10 formed inside the drain 8 for sorting the mixed rice. This is a winnow that is connected through an air passage 11 to suck and discharge straw waste, etc., and discharges the mixed rice that has been de-processed by the de-rolls 3 and 4 to the outside of the machine from the take-out port 7 through the guide passage 10. The structure is such that small foreign substances such as straw waste mixed in the mixed rice are separated and removed outside the machine by the lifting force of the winnowing machine.

In addition, 12 and 13 in the same figure are the above-mentioned unrolling 3,
4, a main and sub-shaft; 14, a gap adjustment link which pivots the sub-shaft 13 in the middle and whose lower end is swingably supported on the support shaft 15; and 16, a threaded member 17 connected to the upper end of the link 14; A rotary screw shaft 18 is supported on the body case 20 via a bracket 19 and is a drive motor serving as a gap adjustment device that is interlocked and connected to the screw shaft 16. By driving the motor 18 in the forward and reverse directions as appropriate, The roll gap C is configured to be adjusted to a large or small gap width.

As shown in FIGS. 2 and 3, the guide passage 1
The sampling roll 21 is internally installed in the downflow gutter 8, and the roll shaft 24 of the roll 21 is interlocked and connected to a deceleration constant rotation drive motor 23 that is fixedly supported on the body case 20 via a mounting plate 22. The roll 21 is provided so as to face into the guide passage 10 through a hole 25 opened in the middle part of the side plate 8a. The sampling roll 21
Sampling holes 26 into which one grain is inserted are opened at equal intervals on the outer peripheral surface of the guide passage 10, and one grain is randomly inserted into the hole 26 from among the grains flowing down the guide passage 10. It is configured so that it can be scooped up and extracted.

Further, a photoelectric grain sensor 28 is fixedly supported on the upper plate 8b of the downflow gutter 8 directly above the sampling roll 21 through a peephole 27, and is fitted into the sample hole 26 by rotating the sampling roll 21 at a constant speed. The structure is such that the light beam from the sensor 28 is irradiated onto one grain lifted to the uppermost position and the reflected light is received. As is clear from the above, there is a sampling roll 21 that scoops and extracts each grain that has been removed, and a grain that distinguishes each grain extracted by the sampling roll 21 into brown rice and paddy. A sampling roll 21 is installed inside the guide passage 10 for taking out the grains after they have been shelled, and the sampling roll 21 is installed inside the guide passage 10 substantially parallel to the direction in which the grains flow down.

Note that the sampling roll 21 is provided offset to one side of the guide passage 10 as shown in FIG.
A main passage 10a is formed between the outer surface of the roll 21 and the side plate 8a of the downflow gutter 8, through which most of the grains are guided down.

FIG. 4 shows an automatic control circuit diagram for the unrolling 3, 4, in which the sensor 28 is inputted to an arithmetic circuit 31 via a brown rice counter 29 and a paddy counter 30, and the arithmetic circuit 31 has an iterative control circuit. A timer 32 is connected, and the sensor 28 distinguishes grains sequentially extracted by the sample hole 26 of the sampling roll 21 into brown rice and paddy within a certain period of time, and calculates the total number of brown rice detected within the certain period of time. The calculation circuit 31 is configured to appropriately output the ratio of the number of rice grains and the number of rice grains over a certain period of time.

Further, the arithmetic circuit 31 is connected to the motor 1 through a comparison circuit 34 having a reference setter 33 and forward/reverse drive circuits 36 and 37 having a pulse oscillator 35.
8, and when the ratio of the number of unpolished rice to the number of paddy, that is, the shedding ratio signal output from the arithmetic circuit 31, is larger or smaller than the reference setting value, the motor 18 is driven in pulses to drive the motor 18 in forward and reverse directions, and adjust the roll gap. C is configured to be adjusted to an appropriate width.

The present embodiment is constructed as described above, and the mixed rice that has been de-rolled by the de-rolls 3 and 4 and screened by the winnower 9 flows down to the take-out port 7 through the guide passage 10. The grains fit into the sample hole 26 of the roll 21 on the way down, and are carried up to the uppermost sensor 28 irradiation position by the rotation of the roll 21. Based on the difference in the amount of reflected light (paddy > brown rice), the rice is subjected to an operation to determine whether it is brown rice or paddy.

On the other hand, the number of grains that are classified as brown rice and paddy by the sensor 28 within a certain period of time set by the timer 3 is counted by the counters 29 and 30, and the calculation circuit 31 calculates the number of grains determined as brown rice and paddy within a certain period of time set by the timer 3. detected. This is compared with a standard setting value in the comparison circuit 34, and when there is a large amount of so-called brown rice with a higher detection rate than the setting value, the motor 18
The roll gap C is automatically adjusted to a large size by driving the motor 18 in the normal or reverse direction, and when there is a large amount of paddy with a detection rate lower than the set value, the roll gap C is automatically adjusted to a small value by driving the motor 18 in the reverse or normal direction. It is.

FIG. 5 shows another modified structure, in which a sample drop port 38 is opened on the bottom plate of the sampling roll 21 rotation transfer side of the downflow gutter 8, and the sample is inserted into the sample hole 26 and carried up. The grains falling down and extracted from the drop opening 38 are irradiated with a light beam from the grain sensor 28 installed at the bottom of the downflow gutter 8 for identification. Since the removal and discrimination operation is performed from the inside of the grain to the outside, it is not affected by dust, etc., and more accurate results can be obtained. It can be done by leaning over.

In addition, in the above-mentioned embodiment, a configuration example was shown in which the number of brown rice and the number of paddy are counted within a certain period of time.
Counting the number of brown rice and paddy within a certain rotation of the roll 21, or the sensor 28 within a certain time
It is also possible to adopt a configuration in which the mixing ratio is detected based on the cumulative value of the amount of detected light. Furthermore, a configuration may be adopted in which the mixing ratio is detected from the number of brown rice and the number of paddy among the constant number of total grains counted.

As is clear from the above embodiments, the present invention includes a sampling roll 21 that scoops and extracts each removed grain, and a grain extracted by the sampling roll 21 that is divided into brown rice and paddy. A sampling roll 21 is installed inside the guide passage 10 for taking out the grains after shedding, and the sampling roll 21 is installed inside the guide passage 10 substantially parallel to the downward direction of the grains. Since the sampling roll 21 is installed inside the guide passage 10, the structure for mounting the roll 21 and the shape of the guide passage 10 can be easily simplified, and the sampling roll 21 can be installed approximately parallel to the grain flow direction. Since the sampling roll 21 is attached, there is almost no resistance to the grains flowing down, and the grains can flow down the guide passage 10 better than before.

[Brief explanation of the drawing]

Fig. 1 is an overall sectional view of a rice huller showing an embodiment of the present invention, Fig. 2 is an enlarged explanatory view of the main parts, Fig. 3 is a longitudinal sectional view of the same, Fig. 4 is a control circuit diagram, and Fig. 5 The figure is an explanatory diagram showing another modified structure. 21... Sampling roll, 24... Roll axis, 28... Grain sensor.

Claims (1)

[Scope of utility model registration request] A sampling roll 21 for scooping up and extracting each grain of grains that have been removed, and the sampling roll 21
It is equipped with a grain sensor 28 that distinguishes one grain extracted by the method into brown rice and paddy. A dehulling rate detection device for a huller, characterized in that a sampling roll 21 is mounted substantially parallel to the grain flow direction.