JPH04350544A - Quality judging apparatus for grain particle - Google Patents

Abstract

PURPOSE:To achieve higher quality judging accuracy with the prevention of noises by providing a hole for a sample of a rotatable disc with a suction mechanism to fix a sample grain particle by suction to block a change in attitude of the sample grain. CONSTITUTION:A sample grain S being transferred held in a hole 8 for samples provided in the circumferential direction of an outer periphery of a disc 6 at an equal interval is held stable with a holding section 8-1 on the side of the top surface 16 with a hole of a diameter larger than that of a pierced part 8-2 on the side of the undersurface 18 while blocked form changing in attitude. In a suction mechanism 20, a decompression fan 42 is driven with a decompression motor 40 at a decompression section 24 to discharge ait in a decompression space 28 negative and the resulting negative pressure is transmitted to a suction space 28 through a communication path 44 to act on the through hole 8-2 so that the grain S is fixed on the holding part 8-1 by suction to keep it at a fixed attitude. This can prevent a change in incident light into the grain S thereby enabling the obtaining of a detection value without noise with a reduction in change of reflected light and transmission light of the grain S.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] This invention relates to a grain quality determination device, and in particular, it is capable of preventing changes in the posture of sample grains held and transferred in a sample hole of a rotatable disk, thereby improving determination accuracy. The present invention relates to a grain quality determination device that can be improved.

0002

[Prior Art] A grain quality determination device is provided with a rotatable disk having a plurality of sample holes at equal intervals in the circumferential direction on the outer periphery, and the grain is transferred while being held in the sample holes of this disk. The light condition, for example, transmitted light and/or reflected light, is detected for each sample grain, and the detected values are used to determine whether the grain is of good quality, defective, or split.

[0003] As such a grain quality determination device,
An application has already been filed by the applicant of the present invention, and is disclosed in, for example, Japanese Patent Laid-Open No. 103947/1983. What is disclosed in this publication is that a rotatable disk having a plurality of sample holes at equal intervals in the circumferential direction on the outer periphery is provided in an inclined manner, and the sample grain is transferred from the top of the disk toward the front in the direction of transfer. By providing the detection unit at the lowered position of the disc, the state of light can be detected at a position where the state of the sample grain held in the sample hole of the disk and transferred is stable, thereby preventing misjudgment. It is something that

0004

[Problems to be Solved by the Invention] However, in conventional grain quality determination devices, the size of sample grains varies depending on the variety, crop, etc. The size of the sample hole is set large. Therefore, the sample grain is held in an unstable position in the sample hole of the disk, and there is a problem in that the position changes in a complicated manner while being transferred. In other words, the sample grains held in the sample hole of the disk and transferred undergo complicated postures within the sample hole due to interactions such as the force in the rotational direction of the disk, the frictional force with the bottom surface, and gravity. It will be transported while changing.

[0005] Therefore, when light is irradiated to detect the light state of the sample grain whose posture changes in a complicated manner within the sample hole, a change in the incident light on the sample grain will be induced. . As a result, the reflected light and transmitted light of the sample grain change in a complicated manner, resulting in a detected value with superimposed noise, which has an inconvenient effect on the quality determination and reduces the determination accuracy.

[0006]

[Means for Solving the Problems] In order to eliminate such inconveniences, the present invention provides a rotatable disk having a plurality of sample holes at equal intervals in the circumferential direction on the outer periphery of the disk. In a grain quality determination device that determines the quality of grains by detecting the light condition of each sample grain that is transported
The present invention is characterized in that a suction mechanism is provided to suction-press the sample grains to the sample holes in order to prevent the sample grains held and transferred in the sample holes from changing their posture.

[0007]

[Operation] According to the configuration of the present invention, in the grain quality determination device, the sample grains are sucked into the sample hole in order to prevent the sample grains held in the sample hole and transferred from changing their posture. By providing the suction mechanism for crimping, it is possible to prevent the sample grains held in the sample hole and transferred from changing their posture.

[0008]

Embodiments Next, embodiments of the present invention will be described in detail with reference to the drawings.

1 to 3 show a first embodiment of the present invention. In the figure, 2 is a quality determination device, 4 is a motor, 6 is a disk, 8 is a sample hole, 10 is a light source, 12 is a light receiving element, and 14 is a control section. The quality determination device 2 has a plurality of sample holes 8 provided at equal intervals in the circumferential direction of the outer periphery of a disk 6 rotated by a motor 4. As will be described later, the sample hole 8 is made up of a holding part 8-1 and a through part 8-2, and is provided so as to penetrate from the upper surface 16 side of the disk 6 to the lower surface 18 side. The state of light is detected for each grain of the sample grain S held and transferred by the holding part 8-1 of the sample hole 8. In this example, the sample grain S is irradiated by the light source 10.
The amount of light transmitted through the penetrating portion 8-2 is detected by the light receiving element 1.
Detected by 2. The detected value, which is the amount of transmitted light, is determined by the control unit 1.
4 is input. The control unit 14 determines whether the sample grain S is a good quality grain, a bad grain, a split grain, etc. based on this detected value.

In such a quality determination device 2, the sample grain S held in the sample hole 8 of the disk 6 and transferred
In order to prevent the sample grain S from changing its posture, the sample grain S is inserted into the sample hole 8.
A suction mechanism 20 is provided for suction-pressing.

In this first embodiment, the suction mechanism 20 includes a suction section 22 and a pressure reducing section 24, as shown in FIG.

The suction section 22 is provided on the lower surface 18 side of the disk 6 so as to surround the sample hole 8 . The sample hole 8 of this disk 6 is located at a holding portion 8-1 with a large hole diameter on the upper surface 16 side.
and a penetration part 8-2 with a small hole diameter on the lower surface 18 side,
It is provided so as to penetrate from the upper surface 16 side to the lower surface 18 side. The suction unit 22 includes a suction space 2 in a substantially cylindrical suction body 26.
8 is included. The suction body 26 has an opening on one side surrounded by a sliding body 32 via an elastic body 30 in an annular shape, and an opening on the other side closed by a transparent body 34. The annular sliding body 32 at one side opening of the suction body 26 is connected to the through hole 8 of the sample hole 8 on the lower surface 18 of the disk 6.
The suction space 28 is brought into communication with the through hole 8-2 of the sample hole 8 by being in close sliding contact with the periphery of the sample hole 8-2. Further, the light receiving element 12 is disposed in the transparent body 34 that closes the other side opening of the suction body 26 so as to be oriented toward the through hole 8 - 2 of the sample hole 8 .

The pressure reducing section 24 includes a substantially cylindrical pressure reducing body 36.
A decompression space 38 is provided within the decompression space 38, and a decompression fan 42 driven by a decompression motor 40 is disposed in the decompression space 38. The decompression body 36 has an opening on one side open to the outside air, and an opening on the other side connected to the suction body 26 of the suction section 22 through a connecting body 46 containing a communication passage 44 . Thereby, the suction space 28 of the suction main body 26 and the decompression space 38 of the decompression main body 36 are connected to the communication passage 44.
has been contacted by. Note that the pressure reducing fan 42 can be an axial fan or a centrifugal fan. Alternatively, a vacuum pump can be used instead of a pressure reducing fan.

Next, the operation will be explained.

The quality determination device 2 is configured to transfer sample grains held in holding portions 8-1 of sample holes 8 provided at equal intervals in the circumferential direction on the outer periphery of a disk 6 rotated by a motor 4. Light is irradiated from the light source 10 to each grain of S, and the amount of light transmitted through the sample grain S and passed through the penetration part 8-2 is detected by the light receiving element 12. The detected value, which is the amount of transmitted light, is input to the control unit 14, and the sample grains S are determined as good quality grains, bad grains, split grains, etc.

The sample grain S held and transferred in the sample hole 8 can be transported by forming the holding portion 8-1 on the upper surface 16 side larger than the penetrating portion 8-2 on the lower surface 18 side. Stably held. Thereby, the sample grain S is prevented from changing its posture. In addition, the suction mechanism 20 drives the decompression fan 42 by the decompression motor 40 of the decompression unit 24 to create the decompression space 38 .
The air is discharged, and the pressure in the reduced pressure space 38 is reduced to a negative pressure state. The negative pressure in the reduced pressure space 38 is transmitted to the suction space 28 of the suction section 22 through the communication passage 44, and is applied to the through hole 8-2 of the sample hole 8 that communicates with this suction space 28. Thereby, the sample grain S held and transferred by the holding part 8-1 of the sample hole 8 is sucked and crimped by the holding part 8-2.

In this way, by forming the holding portion 8-1 on the upper surface 16 side of the sample hole 8 larger than the penetrating portion 8-2 on the lower surface 18 side, changes in the posture of the sample grain S can be prevented. can be prevented. Moreover, by suction-pressing the sample grain S into the sample hole 8 by the suction mechanism 20, it is possible to further prevent the sample grain S from changing its posture.

Therefore, the sample grain S can be transferred in a constant posture within the sample hole 8. This results in
It is possible to prevent changes in the incident light on the sample grain S, and it is also possible to prevent changes in the reflected light and transmitted light of the sample grain S, and it is possible to obtain noise-free detected values. As a result, inconveniences that adversely affect quality determination can be avoided, and determination accuracy can be improved. Further, the suction mechanism 20 can suck and discharge dust around the sample hole 8. Thereby, dust near the light source 10 and the light receiving element 12 can be removed, and detection accuracy can be improved.

FIG. 4 shows a second embodiment of the invention.

The feature of this second embodiment is that the suction section 22 of the suction mechanism 20 is provided so as to surround the sample hole 8 on the lower surface 18 side of the disk 6, and the suction body 26 of the suction section 22 is A transparent body 34 that closes the opening on the other side is disposed close to the through hole 8-2 of the sample hole 8 on the lower surface 18 of the disk 6,
The suction space 28 of the suction main body 26 includes the suction section 22 and the pressure reducing section 24.
The reason is that it is connected to a filter section 48 provided between. This filter section 48 is provided with a filter space 52 contained in a filter body 50, and this filter space 52 is connected to the suction space 28 and the decompression space 38 through a communication passage 44, and a filter element 54 is disposed in this filter space 52. It is set up.

According to the configuration of this second embodiment, the same effects as those of the first embodiment described above can be achieved, and furthermore, the transparent body 34
By disposing the light-receiving element 12 close to the through hole 8-2 of the sample hole 8 on the lower surface 18 of the disk 6, the light receiving element 12 is
can be placed close to the through hole 8-2 of the sample grain S, and the transmitted light of the sample grain S can be more directly received, thereby improving the detection accuracy. In addition, the suction mechanism 20 can remove dust around the sample hole 8, the light source 10, and the light receiving element 12, and can contribute to improving detection accuracy. By providing the filter section 48, scattering of dust can be prevented.

FIGS. 5 and 6 show a third embodiment of the present invention.

The feature of this third embodiment is that the transparent body 34 that closes the other side opening of the suction body 26 of the suction section 22 of the suction mechanism 20 is passed through the sample hole 8 of the lower surface 18 of the disk 6. The pressure reducing part 24 is arranged close to the hole 8-2, and the pressure reducing part 24 is arranged on the lower surface 18 side of the disc 6, and the pressure reducing space 38 of this pressure reducing part 24 is directly connected to the suction space 28 of the suction part 22. ing.

According to the configuration of the third embodiment, the same effects as those of the first embodiment described above can be achieved, and furthermore, the transparent body 34
By disposing the light-receiving element 12 close to the through hole 8-2 of the sample hole 8 on the lower surface 18 of the disk 6, the light receiving element 12 is
can be placed close to the through hole 8-2 of the sample grain S, and the transmitted light of the sample grain S can be more directly received, thereby improving the detection accuracy. Furthermore, by arranging the pressure reducing section 24 on the lower surface 18 side of the disk 6 and directly communicating the pressure reducing space 38 of the pressure reducing section 24 with the suction space 28 of the suction section 22, the device can be made more compact. At the same time, it is possible to reduce pressure loss and contribute to downsizing of the pressure reducing section 24.

[0025] In the above embodiment, the sample hole 8
As shown in FIG. 7, a step-shaped holding part 8-1 is provided for the penetrating part 8-2, but a tapered holding part 8-1 is provided as shown in FIG. As shown in FIG. 9, the holding part 8-1 and the penetrating part 8-2 can be tapered from the upper surface 16 side to the lower surface 18 side without providing a step.

[0026]

As described above, according to the present invention, it is possible to prevent a change in the posture of sample grains held in sample holes and transferred. Therefore, the sample grain is transferred in a constant posture within the sample hole, thereby preventing changes in the incident light on the sample grain. As a result, it is possible to prevent changes in the reflected light and transmitted light of the sample grain, and to obtain noise-free detection values, thereby avoiding inconveniences that adversely affect quality judgment and improving judgment accuracy. Can be done.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view of a grain quality determination device showing a first embodiment of the present invention.

FIG. 2 is a schematic side view of a grain quality determination device showing a first embodiment of the present invention.

FIG. 3 is an enlarged sectional view of a main part of a grain quality determination device showing a first embodiment of the present invention.

FIG. 4 is an enlarged sectional view of a main part of a grain quality determination device showing a second embodiment.

FIG. 5 is an enlarged plan view of main parts of a grain quality determination device showing a third embodiment.

FIG. 6 is an enlarged sectional view of a main part of a grain quality determination device showing a third embodiment.

FIG. 7 is an enlarged sectional view of a main part of a disk showing an example of a sample hole.

FIG. 8 is an enlarged sectional view of a main part of a disk showing another example of a sample hole.

FIG. 9 is an enlarged sectional view of a main part of a disk showing still another example of a sample hole.

[Explanation of symbols]

2 Quality determination device 4 Motor 6 Disk 8 Sample hole 10 Light source 12 Photo receiving element 14 Control section 16 Top surface 18 Bottom surface 20 Suction mechanism 22 Suction part 24　Pressure reduction section 26 Suction body 28 Suction space 30 Elastic body 32 Sliding body 34 Transparent body 36　Reducing pressure body 38 Decompression space 40　Reducing motor 42　Decompression fan 44 Connecting passage 46 Contact body 48 Filter section 50 Filter body 52 Filter space 54 Filter element

Claims (2)

[Claims] 1. A rotatable disk having a plurality of sample holes arranged at equal intervals in the circumferential direction of the outer periphery, and the light state of each grain being transferred while being held in the sample holes of the rotatable disc. In a grain quality determination device that detects and determines the quality of grains, the sample grains are sucked into the sample hole in order to prevent the sample grains held in the sample hole and transferred from changing their posture. A grain quality determination device characterized by being provided with a suction mechanism for crimping. 2. The grain quality determining device according to claim 1, wherein the sample hole has a diameter larger on the upper surface side of the disk than on the lower surface side.