JP3003789B2 - Grain moisture meter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grain moisture measuring device.

[0002]

2. Description of the Related Art In a conventional grain moisture measuring apparatus, a grain feeding device is provided above a pair of electrode rolls to flow a sample grain down, and the grain dropped between the pair of electrode rolls is pulverized while grinding the grain. It is to measure moisture. The grain feeding device of this conventional moisture measuring device is provided with a concave portion on the circumference of the disk, or provided with a concave portion on the surface of the cylinder, and rotates them in the sample grain or supplies the sample grain to them. As a result, the sample grain is stirred, and each grain is caught in the concave portion on the surface. The cereal caught in the concave portion is conveyed by the rotational movement of the disk or the like and flows down between the electrode rolls.

[0003] This raw material also contains impurities such as those larger than the average grain size of the sample grain or those harder than the sample grain. When these impurities enter between the pair of electrode rolls, the electrode roll is driven. Mechanical damage such as bearings may occur. For this reason, as a safety measure, one of the pair of electrode rolls can be freely moved in and out of distance, and a device for sorting impurities is provided between the grain feeding device and the electrode roll.

[0004] As seen in the above-mentioned prior art, the grain feeding device has a structure in which grains are caught in a concave portion. One or more grains may be caught in the concave portion. This is because the size, for example, the length, width, and thickness of the grain cannot be specified, and the recess is formed in a shape having a margin, which is against the improvement of the accuracy of the moisture meter. That is, in general, it is desirable to supply grains one by one between a pair of electrode rolls in order to improve the accuracy of the moisture meter, but the prior art lacks certainty in this respect.

[0005] In addition, a change in the electrode roll interval caused by biting of a foreign substance larger or harder than a grain between a pair of electrode rolls greatly affects the accuracy of moisture measurement. In this method, a long-term use causes a change between the electrode rolls, and in any case, affects the measurement accuracy. For this reason, a separate device for separating impurities may be separately provided in the middle of the flow of the grain from the grain feeding device, but the device price becomes expensive, and the provision of the separate device increases the size of the moisture meter, which is preferable. Absent.

[0006] Therefore, the sample grains are reliably supplied one by one between the electrode rolls, and the grain which does not affect the electrode roll interval even if foreign substances are bitten between the electrode rolls without carefully selecting the sample grains. The present applicant has already proposed a moisture measuring device (Japanese Patent Application No. 3-106613).

[0007]

However, in the grain moisture measuring device proposed by the present applicant, two or more grains may be simultaneously supplied between the electrode rolls when the grain supply speed is increased. . When two or more grains are supplied at the same time, the moisture value becomes higher than the normal moisture value, and there is a drawback that highly accurate moisture measurement of the grain cannot be performed.

The present invention has solved the above-mentioned drawbacks,
It is an object of the present invention to provide a grain moisture measuring apparatus that prevents two or more grains from being crushed at the same time between electrode rolls and enables highly accurate moisture value measurement.

[0009]

According to the present invention, there is provided a grain moisture measuring device comprising a pair of electrode rolls for detecting moisture in a grain while crushing the grain, and a grain feeding device for supplying the grain to the electrode roll. The grain feeding device is provided with a scraping roll provided with a plurality of scraping claws for lifting a sample grain on the outer peripheral surface of a rotatably provided cylinder, and an elasticity for temporarily holding grains carried by the scraping claws. A body is provided in contact with or close to the width of the cylinder.

[0010]

The sample grain put into the grain feeding device is lifted and carried by the scraping claw, and the moisture of the grain is detected while being crushed between the electrode rolls. At the time of measurement of a sample grain, two or more grains may be sent to the scraping claw, but the grain is temporarily held by an elastic body that is in contact with or in the vicinity of the width direction of the cylinder, so that each grain is temporarily held. The grain falls from the scraping rolls at different times, and is crushed one by one between the electrode rolls.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. Electrode rolls 5 and 6 are rotatably mounted on a main shaft 3 and a sub shaft 4 which are rotatably supported in a machine frame 2 of the grain moisture measuring device 1 at arbitrary intervals. A scraping roller 7 is provided substantially above the electrode rolls 5, 6.
Is rotatably mounted on the shaft 8. A receiving plate 9 is provided, one of which faces between the electrode rolls 5 and 6 along the circumferential direction below the scraping roller 7 and the other is fixed to the machine frame. It is formed so that it can be lifted one by one. The scraping roller 7 and the receiving plate 9 constitute a grain feeding device 10. An input port 11 for feeding sample grains is provided above the scraping roller 7 and may be connected so as to directly feed sample grains or to allow a sample to flow from another device.

Below each of the electrode rolls 5 and 6, brushes 12 and 13 are provided for cleaning off the grains adhering to the electrode rolls 5 and 6, respectively.

The electrode rolls 5, 6 and the scraping roller 7 are driven by an electric motor 14, and the driving mechanism is shown in FIG.
Indicated by. Gear 1 axially mounted on drive shaft 15 of electric motor 13
6 engages with a gear 17 which is mounted on the main shaft 3, and the gear 17 engages with a gear 18 which is mounted on the sub shaft 4. Gears 16 and 1
When the drive shaft 15 rotates due to the engagement of the electrode rolls 7 and 18, the electrode rolls 5 and 6 supported by the main shaft 3 and the sub shaft 4 are rotated.
Rotate in opposite directions. A pulley 19 pivotally attached to the main shaft 3 and a pulley 20 pivotally attached to the shaft 8 are formed so as to rotate in conjunction with each other by a belt 21. Therefore, the rotation of the drive shaft 15 causes the roller 7 to rotate.

Next, the scraping roller 7 will be described with reference to FIGS.
This will be described below. A plurality of scraping claws 25 are provided on the circumference of the roller 24 axially attached to the shaft 8 at equal intervals in the circumferential direction. As is apparent from FIG. 4, the rollers 24 are also provided at equal intervals in the longitudinal direction, and only one scraping claw 25 is provided on a straight line in the circumferential direction in the longitudinal direction. An inclination may be provided on the rotation direction side of the scraping claw 25 in order to make it easy to scrape the sample grain. The width of the scraping claw 25 that hits in the longitudinal direction of the roller 24 is determined as small as possible so that only one grain is scraped according to the length shape of the sample grain. In other words, the inclination of the upper nail 25 in the rotation direction and the width of the roller 24 are arbitrarily changed depending on the size and shape of the sample grain, and are not limited by the present embodiment. What is necessary is just to make it the shape which can be hold | maintained on the nail | claw 24. The rubber elastic body 32 attached to the machine frame 2 is in contact with the roller 24 in the width direction. The elastic body 32 is not limited to rubber, but may be any material having elasticity. In addition, the elastic body 32 may be brought close to the roller 24 without coming into contact with the roller 24, as long as the grain is temporarily held.

Next, control of the moisture measuring apparatus 1 will be described with reference to FIG. Electrode rolls 5, 6
A resistance-voltage conversion circuit 26 that converts an electrical resistance value generated between them into a voltage signal is communicated, and the conversion circuit 26 performs an arithmetic operation via an A / D conversion circuit 27 of a control circuit 31 that converts an analog signal into a digital signal. An arithmetic processing circuit (CPU) 28 comprising a control unit and a main storage unit is communicated. In the CPU 28,
A storage circuit 29 composed of a RAM and a ROM and a display circuit 30 for displaying the measured moisture value are connected.

Next, a specific operation in the above configuration will be described. When the drive shaft 15 is rotated clockwise (forward rotation) by the electric motor 14, the electrode rolls 5 and 6 are rotated in opposite directions to crush the sample grains, and the belt 21 rotates the scraper roller 7 counterclockwise. When the sample grain is put in from the inlet 11, the sample grain is lifted by the roller 7 and the receiving plate 9.
And while being stirred by the scraping roller 7, the particles are introduced one by one between the electrode rolls 5 and 6. While being charged between the electrode rolls 5 and 6, the particles are discharged one by one from the space between the electrode rolls 5 and 6 to the discharge box 22. The electrical resistance value of the sample grain is measured while being crushed between the electrode rolls, and the moisture value of one grain is measured. The electrode rolls 5 and 6 always clean the electrode portions by brushes 12 and 13 provided respectively. When the motor 14 is rotated counterclockwise (reverse rotation), the sample between the electrode rolls 5 and 6 is conveyed to the outside of the electrode roll 5 on the main shaft 3 side by the reverse rotation of the electrode rolls 5 and 6, and the receiving box 23 Is discharged to

Next, control of the moisture measuring device will be described (see FIG. 8). When the moisture measuring device 1 is operated, the measuring program set in the storage circuit 29 starts.
Then, the electric resistance signal of the grains crushed between the electrode rolls 5 and 6 is input to the resistance-voltage conversion circuit 26 and converted into a voltage in the conversion circuit 26. This voltage signal is
After being A / D-converted by the A / D conversion circuit 27, the digital signal is input to the CPU 28. The CPU 28 converts the sequentially input digital signal for each particle into a moisture value. Is calculated. The average value signal of the moisture calculated by the CPU 28 is output to the display circuit 30, and the moisture value is displayed on a digital display screen or the like (not shown).

Next, the operation of the elastic body 32 will be described. At the time of measuring the sample grain, two grains A and B may be sent to the scraper 25 of the roller 24 (FIG. 5).
reference). If the two grains A and B are crushed between the electrode rolls 5 and 6 as they are, the moisture value is measured high and accurate measurement of the moisture value is impossible. However, when the roller 24 rotates, the grain B is held by the elastic body 32 as shown in FIG. 6, but the grain A is released from the elastic body and becomes free to fall. Further, when the roller 24 rotates, the grain B
Are also released from the elastic body 32 and fall free (FIG. 7).
reference). As described above, the grain A
And the falling time of the grain B from the roller 24 is shifted,
The particles are crushed one by one between the electrode rolls 5 and 6. Therefore, the moisture value of the grain crushed between the electrode rolls 5 and 6 is always the moisture value when one grain is crushed, and it is possible to accurately measure the moisture value of the grain.

[0019]

According to the grain moisture measuring apparatus of the present invention, the elastic body for temporarily holding the grain carried by the scraping claw is provided in contact with or in the vicinity of the cylinder in the width direction of the cylinder. At the time of moisture measurement, even if two or more grains may be sent by the scraping claw, the grains are temporarily held by the action of the elastic body, so that the grains of each grain are separated from the grain scraping roll. The falling time is different, and the grains are crushed one by one between the electrode rolls, and the measured moisture value is always the moisture value when one grain is crushed, and it is possible to accurately measure the average moisture value of the grain. In addition, since the accurate moisture value can always be measured, even if the supply speed of the sample grain is increased, the measurement time can be significantly reduced without lowering the moisture value measurement accuracy.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a grain moisture measuring device of the present invention.

FIG. 2 is a diagram showing a driving device of the grain moisture measuring device.

FIG. 3 is a side view of a scraping roller of the grain feeding device.

FIG. 4 is a front sectional view of a scraping roller of the grain feeding device.

FIG. 5 is a view showing the operation of an elastic body.

FIG. 6 is a view showing the operation of an elastic body.

FIG. 7 is a view showing the operation of an elastic body.

FIG. 8 is a control circuit diagram of the grain moisture measuring device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Grain moisture measuring device 2 Machine frame 3 Main shaft 4 Counter shaft 5 Electrode roll 6 Electrode roll 7 Scrape roll 8 Shaft 9 Receiving plate 10 Grain feeding device 11 Input port 12 Brush 13 Brush 14 Electric motor 15 Drive shaft 16 Gear 17 Gear 18 Gear 19 Pulley 20 Pulley 21 Belt 22 Discharge box 23 Receiving box 24 Roller 25 Raising claw 26 Resistance-voltage conversion circuit 27 A / D conversion circuit 28 Arithmetic processing circuit 29 Storage circuit 30 Display circuit 31 Control circuit 32 Elastic body

Continuing from the front page Examiner Toshimitsu Suzuki (56) References JP-A-61-221004 (JP, A) JP-A-64-40056 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) ) G01N 27/00-27/10 G01N 27/14-27/24 F26B 25/00 F26B 25/22

Claims (1)

(57) [Claims] 1. A grain moisture measuring device, which is a pair of electrode rolls for detecting the moisture of a grain while crushing a sample grain and a grain feeding device for supplying a sample grain to the electrode roll, wherein A scraping roll provided with a plurality of scraping claws for lifting a sample grain is provided on the outer peripheral surface of a rotatably provided cylinder, and an elastic body for temporarily holding grains carried by the scraping nails is provided on the cylinder. A grain moisture measuring device provided in contact with or in the width direction of the grain.