Moisture meter

Abstract

To provide a moisture meter with which it is possible to easily and neatly remove adhering matter adhering to the outer circumferential surface of an electrode roll, as well as obtain accurate values even when the work of detecting the moisture content of grains is performed repeatedly.SOLUTION: A moisture meter 1 includes first and second electrode rolls 6, 7 that hold and crush a small-sized grain 10A or a large-sized gain 10B therebetween as it passes through. A control unit 11 detects a resistance value between the first and second electrode rolls 6, 7 at crushing of the small-sized grain 10A or the large-sized gain 10B, and obtains a moisture content from the detected value. On the outer circumferential surface of the first electrode roll 6, are disposed a surface part 8 for crushing which is formed in shape of a curved surface and extending along the circumferential direction, and a recess part 9 for crushing which is recessed in a concave shape. The surface part 8 for crushing crushes the small-sized grain 10A between the second electrode roll 7 and itself. The recess part 9 for crushing crushes the large-sized gain 10B between the second electrode roll 7 and itself. The recess part 9 for crushing opens on one side and / or the other side of the first electrode roll 6 in the direction of the rotation axis C1.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a moisture meter capable of detecting the moisture content of grains. [Background technology]

[0002] Conventionally, harvested grains such as rice and soybeans need to be dried using a dryer so that the grains meet a predetermined moisture content standard, and the drying conditions in these dryers are controlled by periodically detecting the moisture content of the grains using a moisture meter.

[0003] For example, the moisture meter disclosed in Patent Document 1 includes a rotating unit having first and second electrode rolls, and a grain supplying unit capable of supplying grains one by one to the rotating unit. The outer peripheral surface of the first electrode roll includes a crushing surface portion having a curved surface extending along the circumferential direction of the first electrode roll, and a plurality of crushing recesses recessed so that the bottom surface portion is located closer to the rotation axis than the crushing surface portion, and each crushing recess is arranged in a staggered manner on one side and the other side of the rotation axis in the circumferential direction of the first electrode roll. Meanwhile, the second electrode roll is disposed diagonally below the first electrode roll on the grain supplying unit side, and its outer diameter is set to be larger than that of the first electrode roll.

[0004] The first and second electrode rolls rotate in opposite directions, and when small-diameter grains are introduced from the grain feed unit in the rotating state, the small-diameter grains are crushed by pinching them between the crushing surface of the first electrode roll and the outer circumferential surface of the second electrode roll. On the other hand, when large-diameter grains having a larger diameter than the small-diameter grains are introduced from the grain feed unit in the rotating state, the first and second electrode rolls accommodate the large-diameter grains in the crushing recess of the first electrode roll and crush them by pinching them between the outer circumferential surface of the second electrode roll. A control unit capable of detecting a current value and a resistance value between the first and second electrode rolls is connected to the first and second electrode rolls, and the control unit detects a current value and a resistance value between the first and second electrode rolls when crushing small-diameter grains or large-diameter grains, and obtains a moisture content value by converting these values.

[0005] However, if the crushed grains, dust, etc. remain attached to the outer circumferential surfaces of the first and second electrode rolls, these attachments will cause noise when detecting the current value between the first and second electrode rolls, making it impossible to detect accurate values. Therefore, wiping members such as brushes that come into contact with the outer circumferential surfaces of the first and second electrode rolls are arranged on the sides of the first and second electrode rolls, and the wiping action of the wiping members accompanying the rotational action of the first and second electrode rolls wipes away the attachments attached to the outer circumferential surfaces of the first and second electrode rolls. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent Publication No. 2021-173565 Summary of the Invention [Problem to be solved by the invention]

[0007] However, in the case of Patent Document 1, each crushing recess of the first electrode roll is composed of a bottom surface portion on which the large-diameter grains are placed and an annular side surface portion that is continuous with the outer peripheral edge of this bottom surface portion and surrounds the space for storing the large-diameter grains on all sides.Therefore, if any adhesions adhere to the inside of the crushing recess, the side surface portion of the crushing recess will hinder the movement of the adhesions when the adhesions are wiped away with a wiping member, and there is a problem that the adhesions are not sufficiently removed from the inside of the crushing recess.

[0008] The present invention has been made in consideration of the above-mentioned points, and its object is to provide a moisture meter that can easily and cleanly remove any deposits that adhere to the outer peripheral surface of the electrode roll, and that can obtain accurate values ​​even when the detection operation for the moisture content of grains is performed repeatedly. [Means for solving the problem]

[0009] In order to achieve the above object, the present invention is characterized in that an open area for removing deposits is provided in a part of the crushing recess.

[0010] Specifically, the moisture meter is equipped with a moisture detection unit capable of detecting the moisture content of both small-diameter grains and large-diameter grains having a larger particle size than the small-diameter grains, and the moisture detection unit has first and second electrode rolls whose rotation axes extend in the same horizontal direction and which rotate in opposite directions to each other to clamp the small-diameter grains or the large-diameter grains with their respective outer peripheral surfaces and crush them as they pass through, and is configured to detect at least one of the values ​​of voltage, current, and resistance between the first and second electrode rolls when the small-diameter grains or the large-diameter grains are crushed, and to convert the value into a moisture content value, and the following measures have been taken for this moisture meter.

[0011] That is, the moisture meter of the first invention is characterized in that the outer surface of the first electrode roll is provided with a crushing surface portion which is curved and extends circumferentially, and which crushes the small-diameter grains between the first electrode roll and the second electrode roll, and one or more crushing recesses whose bottom surface portion is recessed so as to be positioned closer to the rotation axis than the crushing surface portion, and which crush the large-diameter grains while containing them between the first electrode roll and the crushing recesses, and that the crushing recesses are open to at least one of one side and the other side in the direction of the rotation axis of the first electrode roll. In a moisture meter configured in this manner, when a wiping member is brought into contact with an attachment located inside the crushing recess of the first electrode roll to move the attachment, the attachment moves along the inner surface of the crushing recess until it reaches an open area on one or the other side of the crushing recess in the direction of the rotation axis, and then acts to fall from the open area.

[0012] The moisture meter of the second invention is characterized in that, in the first invention, the crushing recess comprises a front side portion provided on the front side of the bottom portion in the direction of rotation and extending along the rotation axis, and a rear side portion provided on the rear side of the bottom portion in the direction of rotation and extending along the rotation axis, and a front curved surface portion is provided between the bottom portion and the front side portion, connecting the bottom portion and the front side portion in a concave cross-section, and a rear curved surface portion is provided between the bottom portion and the rear side portion, connecting the bottom portion and the rear side portion in a concave cross-section. A moisture meter configured in this manner acts to eliminate any sharp-angled portions in the cross section of the continuous portion of the bottom surface and front side surface in the direction intersecting the rotation axis, and in the cross section of the continuous portion of the bottom surface and rear side surface in the crushing recess.

[0013] The moisture meter of the third invention is characterized in that, in the first or second invention, the crushing recess is provided on one or the other side of the bottom portion in the direction of the rotation axis, and has a lateral side surface portion extending along the rotation direction of the first electrode roll, and a lateral curved surface portion is provided between the bottom portion and the lateral side surface portion, connecting the bottom portion and the lateral side surface portion in a concave cross-sectional shape. A moisture meter configured in this manner acts to eliminate any acute angled portions in the cross section of the continuous portion of the bottom surface portion and the lateral surface portion in the direction intersecting the rotation direction of the first electrode roll in the crushing recess.

[0014] The moisture meter according to a fourth aspect of the present invention is the moisture meter according to the first aspect of the present invention, characterized in that the first electrode roll is an integrally processed product made of a metal material. In a moisture meter configured in this manner, the first electrode roll does not have a divided structure, and therefore it acts to prevent a part of the deposit from getting into the mating surfaces of the divided bodies and becoming unable to completely remove it. Effect of the Invention

[0015] In the first invention, when a wiping member is brought into contact with an attachment located inside the crushing recess of the first electrode roll to move the attachment, the attachment moves along the inner surface of the crushing recess and reaches an open area on one or the other side of the crushing recess in the rotation axis direction, and falls from the open area. Therefore, the attachment attached to the crushing recess of the first electrode roll can be easily removed, and when the detection work of the moisture content value of the grain is repeatedly performed, noise is prevented from being added to the detection value, and an accurate value can be obtained.

[0016] In the second invention, in the crushing recess, there are no acute angled portions in the cross section of the continuous portion between the bottom surface portion and the front side surface portion in the direction intersecting with the rotation axis and in the cross section of the continuous portion between the bottom surface portion and the rear side surface portion. Therefore, it is possible to prevent a part of the deposit located inside the crushing recess from being stuck between the bottom surface portion and the front side surface portion, or between the bottom surface portion and the rear side surface portion and being unable to be removed, and to completely remove the deposit.

[0017] In the third invention, in the crushing recess, the cross section of the continuous part of the bottom surface part and the side surface part in the direction intersecting the rotation direction of the first electrode roll does not have an acute angle shape part, so that it is possible to prevent a part of the attachment located inside the crushing recess from getting stuck between the bottom surface part and the side surface part and becoming unable to be removed, and to prevent the attachment from remaining inside the crushing recess.

[0018] In the fourth aspect of the present invention, since the first electrode roll is not divided, it is possible to prevent a part of the deposit from getting into the mating surface of the divided parts and becoming unable to be completely removed. Therefore, it becomes even more difficult for the deposit to adhere to the outer circumferential surface of the first electrode roll, and an accurate value can be reliably obtained when detecting the moisture content. [Brief description of the drawings]

[0019] [Figure 1] FIG. 1 is a perspective view of a moisture meter according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a front view of the inside of the moisture meter according to the embodiment of the present invention. [Diagram 3] FIG. 3 is a view taken along the arrow III in FIG. 2. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3, showing the state immediately before the small-diameter grains are crushed. [Diagram 5] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3, showing a state immediately before the large-diameter kernels are crushed. [Figure 6] FIG. 6 is an enlarged view of a portion VI in FIG. 5. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, in which: It should be noted that the following description of the preferred embodiments is merely exemplary in nature.

[0021] 1 and 2 show a moisture meter 1 according to an embodiment of the present invention. This moisture meter 1 is a device that is attached to a grain flow passage through which grains 10 flow in a circulation dryer that dries harvested grains such as rice and soybeans while circulating them, and includes a roughly rectangular parallelepiped main body case 2 having an internal storage space S1.

[0022] In the embodiment of the present invention, grains 10 such as rice and wheat having a grain size of 2 mm or more and less than 5 mm are referred to as small grains 10A, and soybeans and the like having a grain size of 5 mm or more and 16 mm or less and larger than the small grains 10A are referred to as large grains 10B (see Figs. 4 and 5). For example, the large grains 10B include corn and raw soybeans with high moisture content before drying.

[0023] A window (not shown) communicating with the accommodation space S1 is provided in approximately the center of the front surface of the main body case 2, and the window is covered with a transparent cover 2a having a rectangular plate shape.

[0024] A rectangular grain inlet 2b is formed approximately in the center of one side of the main body case 2, and grains 10 flowing down the grain flow passage in the circulating dryer are introduced into the storage space S1 through this grain inlet 2b.

[0025] As shown in Figure 2, a moisture detection unit 3 capable of detecting the moisture content of grains 10 is arranged on one widthwise side of the storage space S1, while a grain feeding unit 4 capable of supplying grains 10 one by one to the moisture detection unit 3 is arranged on the other widthwise side of the storage space S1, and a control panel 11 which operates the moisture detection unit 3 and the grain feeding unit 4 is connected to the moisture detection unit 3 and the grain feeding unit 4.

[0026] The grain feeding unit 4 is provided with a rotating transfer section 5 which transfers each grain 10 introduced into the storage space S1 from the grain inlet 2b by a rotating action at a predetermined interval, and the rotating transfer section 5 supplies the grains 10 one by one to the moisture detection section 3 via a chute 5a extending diagonally downward.

[0027] The moisture detection unit 3 comprises a rotating unit 3A arranged in a section extending from the center to the bottom on one widthwise side of the storage space S1, a drive motor 3B arranged above the rotating unit 3A, and a gear box 3C connecting the rotating unit 3A and the drive motor 3B.

[0028] The rotation unit 3A includes a first electrode roll 6 and a second electrode roll 7 each having a substantially disk shape with some thickness.

[0029] The first electrode roll 6 and the second electrode roll 7 are each an integrally processed product formed by cutting a steel material.

[0030] The first electrode roll 6 is disposed directly below the drive motor 3B with its center line extending horizontally in the front-rear direction of the apparatus, and rotates clockwise (in the R1 direction) when viewed from the front, about the center line as the rotation axis C1.

[0031] As shown in Figures 3 to 6, the outer peripheral surface of the first electrode roll 6 is formed with a crushing surface portion 8 having a curved surface extending in the circumferential direction and having a knurled surface, and six crushing recesses 9 opening radially outward.

[0032] Each crushing recess 9 is arranged in a staggered pattern alternately on one side and the other side of the rotation axis C1 in the circumferential direction of the first electrode roll 6, while the crushing surface portion 8 has a shape that extends in the circumferential direction centered on the rotation axis C1, snaking between each crushing recess 9.

[0033] In the following, for convenience, the crushing recess 9 located on one side of the first electrode roll 6 in the direction of the rotation axis C1 will be referred to as the crushing recess 9A, and the crushing recess 9 located on the other side of the first electrode roll 6 in the direction of the rotation axis C1 will be referred to as the crushing recess 9B.

[0034] That is, the three crushing recesses 9A are arranged at equal intervals in the circumferential direction around the rotation axis C1, while the three crushing recesses 9B are arranged at equal intervals in the circumferential direction around the rotation axis C1 and are each located at the middle position of each crushing recess 9A when viewed from the direction of the rotation axis C1.

[0035] The crushing recess 9A has a substantially W-shape that is circumferentially symmetrical when viewed from the direction of the rotation axis C1, and the dimension in the direction of the rotation axis C1 corresponds to the large-diameter kernels 10B.

[0036] The crushing recess 9A has a bottom surface portion 9a located closer to the rotation axis C1 than the crushing surface portion 8, and the bottom surface portion 9a has a mountain-like cross-section with a pair of inclined surfaces that gradually approach each other circumferentially as they move radially outward.

[0037] The tip position P1 of the bottom portion 9a is located at a position that does not protrude from the opening of the crushing recess 9A, and as shown in Figure 6, the distance W1 from the opening position of the crushing recess 9A is set to approximately 1 to 2 mm.

[0038] The bottom portion 9a is set at a position where, when a large-diameter grain 10B is placed thereon, a portion of it will protrude radially outward from the opening of the crushing recess 9A, and where, when a small-diameter grain 10A is placed thereon, the small-diameter grain 10A will not protrude radially outward from the opening of the crushing recess 9A, either.

[0039] A front side portion 9b extending approximately linearly along the rotation axis C1 is provided on the front side of the bottom portion 9a in the direction of rotation, and this front side portion 9b is shaped to gradually incline away from the bottom portion 9a as it moves toward the front in the direction of rotation.

[0040] Between the bottom surface portion 9a and the front side surface portion 9b, a front curved surface portion 9c that connects the bottom surface portion 9a and the front side surface portion 9b with a concave cross-section is provided continuously along the rotation axis C1, and the radius of curvature of this front curved surface portion 9c is set to 1.0 to 2.0 mm.

[0041] A rear side portion 9d is provided on the rear side of the bottom portion 9a in the direction of rotation, extending in a substantially straight line along the rotation axis C1, and this rear side portion 9d is shaped to gradually incline away from the bottom portion 9a as it moves toward the rear side in the direction of rotation.

[0042] Between the bottom surface portion 9a and the rear side surface portion 9d, a rear curved surface portion 9e that connects the bottom surface portion 9a and the rear side surface portion 9d with a concave cross-section is provided continuously along the rotation axis C1, and the radius of curvature of this rear curved surface portion 9e is set to 1.0 to 2.0 mm.

[0043] On the other side of the bottom surface portion 9a in the direction of the rotation axis C1, a lateral side surface portion 9f is provided extending in the rotation direction of the first electrode roll 6, and this lateral side surface portion 9f extends in an approximately semicircular shape when viewed from the opening side of the crushing recess 9A, and has a shape that is connected to the front side surface portion 9b and the rear side surface portion 9d.

[0044] Between the bottom surface portion 9a and the lateral side surface portion 9f, a lateral curved surface portion 9g that connects the bottom surface portion 9a and the lateral side surface portion 9f with a concave cross-section is provided continuously along the lateral side surface portion 9f, and the radius of curvature of this lateral curved surface portion 9g is set to 1.0 to 2.0 mm.

[0045] The portion of the crushing recess 9A facing the lateral side surface portion 9f, ie, the one side of the crushing recess 9A in the direction of the rotation axis C1 of the first electrode roll 6, has no side surface portion and is open.

[0046] The crushing recess 9B has a structure symmetrical to the crushing recess 9A in the direction of the rotation axis C1 when viewed from the radial direction of the first electrode roll 6. That is, the crushing recess 9B has no side surface on the other side of the rotation axis C1 of the first electrode roll 6, and is open. The crushing recess 9B has the same structure as the crushing recess 9A except that it is symmetrical to the rotation axis C1, and is therefore denoted by the same reference numeral.

[0047] The second electrode roll 7 is arranged diagonally below the first electrode roll 6 on the grain feeding unit 4 side, with its center line extending horizontally in the front-to-rear direction of the device, and rotates counterclockwise (in the R2 direction) when viewed from the front, with the center line as the rotation axis C2.

[0048] The second electrode roll 7 has approximately the same dimension as the first electrode roll 6 in the direction of the rotation axis C1, but the outer diameter of the second electrode roll 7 is set to be larger than the outer diameter of the first electrode roll 6.

[0049] In addition, the outer circumferential surface of the second electrode roll 7 is knurled.

[0050] The drive motor 3B is connected to the first electrode roll 6 and the second electrode roll 7 via a gear box 3C, and is adapted to rotate the first electrode roll 6 and the second electrode roll 7 in opposite directions by driving the motor 3B to rotate.

[0051] When small-diameter grains 10A are introduced from the grain feeding unit 4, the first electrode roll 6 and the second electrode roll 7 rotate in opposite directions to each other, thereby sandwiching the small-diameter grains 10A between the crushing surface 8 of the first electrode roll 6 and the outer peripheral surface of the second electrode roll 7 and crushing them as they pass through.

[0052] On the other hand, when large-diameter grains 10B are introduced from the grain feeding unit 4, the first electrode roll 6 and the second electrode roll 7 rotate in opposite directions to each other, thereby crushing the large-diameter grains 10B contained in the crushing recess 9 of the first electrode roll 6 as they pass through by sandwiching them between the outer peripheral surface of the second electrode roll 7.

[0053] Around the moisture detection section 3, a first cleaning unit 12 and a second cleaning unit 13 for cleaning the rotation unit 3A are disposed.

[0054] As shown in Figure 2, the first cleaning unit 12 is composed of a first scraper 12a and a first brush 12b arranged at a predetermined interval from the upstream side in the direction of rotation on the side of the first electrode roll 6 opposite the grain feeding unit 4, and the tips of the first scraper 12a and the first brush 12b are adapted to slide against the outer peripheral surface of the first electrode roll 6 in a rotating state to clean the outer peripheral surface of the first electrode roll 6.

[0055] In addition, the second cleaning unit 13 is composed of a second scraper 13a and a second brush 13b arranged at a predetermined interval below the second electrode roll 7, in order from the upstream side in the direction of rotation, and the tips of the second scraper 13a and the second brush 13b are adapted to slide against the outer peripheral surface of the second electrode roll 7 in a rotating state to clean the outer peripheral surface of the second electrode roll 7.

[0056] The control panel 11 is configured to operate the drive motor 3B to rotate the first electrode roll 6 and the second electrode roll 7 in opposite directions via the gear box 3C.

[0057] The control panel 11 also has a detection unit 11a capable of detecting the resistance value between the first electrode roll 6 and the second electrode roll 7. This detection unit 11a detects the resistance value between the first electrode roll 6 and the second electrode roll 7 when the small-diameter grains 10A or large-diameter grains 10B supplied from the grain feeding unit 4 pass between the first electrode roll 6 and the second electrode roll 7, which rotate in opposite directions, and are sandwiched and crushed, and converts the moisture content of the small-diameter grains 10A or large-diameter grains 10B from the resistance value.

[0058] That is, the moisture detector 3 is capable of detecting the moisture content of both the small-diameter kernels 10A and the large-diameter kernels 10B.

[0059] Next, detection of the moisture content of the small-diameter grains 10A using the moisture meter 1 will be described in detail.

[0060] When small-diameter grains 10A are dried in a circulating dryer, the small-diameter grains 10A flowing downward through the grain passage are introduced little by little into the storage space S1 inside the main body case 2 from the grain inlet 2b of the main body case 2, as shown in Figure 2.

[0061] Each small-diameter grain 10A introduced into the storage space S1 is hooked onto a part of the outer circumferential surface of the rotating rotary transfer section 5 and transferred sequentially at a predetermined interval, and is supplied one by one to the downstream side of the device through the chute 5a.

[0062] The small diameter grains 10A that have passed through the shooter 5a are fed in front of the gap between the first electrode roll 6 rotating in the R1 direction and the second electrode roll 7 rotating in the R2 direction. The small diameter grains 10A then reach the outer peripheral surface of the second electrode roll 7, and while placed on the outer peripheral surface of the second electrode roll 7, they reach the gap between the first electrode roll 6 and the second electrode roll 7 due to the rotation of the second electrode roll 7.

[0063] Then, as shown in Figure 4, the small-diameter grains 10A are crushed by being sandwiched between the second electrode roll 7 and the crushing surface portion 8 of the first electrode roll 6, and the moisture content of the small-diameter grains 10A can be obtained by converting the resistance value detected by the detection unit 11a during crushing.

[0064] If small-diameter grains 10A enter each crushing recess 9 of the first electrode roll 6, the small-diameter grains 10A will not be sandwiched between the first electrode roll 6 and the second electrode roll 7, and so the small-diameter grains 10A will pass between the first electrode roll 6 and the second electrode roll 7 without being crushed, and then fall below the first electrode roll 6 and the second electrode roll 7.

[0065] Next, the measurement of the moisture content of the large-diameter kernels 10B using the moisture meter 1 will be described in detail.

[0066] When the large grains 10B are dried in the circulation dryer, the large grains 10B flowing downward in the grain passage are introduced little by little into the storage space S1 inside the main case 2 from the grain introduction port 2b of the main case 2.

[0067] Each large diameter grain 10B introduced into the storage space S1 is hooked onto a part of the outer circumferential surface of the rotating rotary transfer section 5 and transferred sequentially at a predetermined interval, and is supplied one by one to the downstream side of the device via the chute 5a.

[0068] The large diameter grains 10B that have passed through the shooter 5a are fed in front of the gap between the first electrode roll 6 and the second electrode roll 7. Then, the large diameter grains 10B reach the outer peripheral surface of the second electrode roll 7, and reach the gap between the first electrode roll 6 and the second electrode roll 7 due to the rotation of the second electrode roll 7 while being placed on the outer peripheral surface of the second electrode roll 7.

[0069] Then, as shown in FIG. 5, when the large-diameter grain 10B is positioned on the crushing surface 8 of the first electrode roll 6, it does not enter between the first electrode roll 6 and the second electrode roll 7, but remains in a position just before entering between the first electrode roll 6 and the second electrode roll 7, and when the crushing recess 9 reaches a position corresponding to the large-diameter grain 10B, the large-diameter grain 10B is accommodated in the crushing recess 9 and is sandwiched between the outer peripheral surface of the second electrode roll 7 and crushed, and the moisture content of the large-diameter grain 10B can be obtained by converting the resistance value detected by the detection unit 11a during crushing.

[0070] As described above, according to the embodiment of the present invention, when the first brush 12b and the second brush 13b are brought into contact with the deposits located inside the crushing recess 9 of the first electrode roll 6 to move the deposits, the deposits move along the inner surface of the crushing recess 9 to reach an open area on one or the other side in the direction of the rotation axis C1 of the crushing recess 9 and drop from the open area. Therefore, the deposits adhering to the crushing recess 9 of the first electrode roll 6 can be easily removed, and when the moisture content of the kernels 10 is repeatedly detected, noise can be prevented from being added to the detected value, and an accurate value can be obtained.

[0071] In addition, a front curved surface portion 9c that connects the bottom surface portion 9a and the front side surface portion 9b in a cross-sectionally concave shape is provided between the bottom surface portion 9a and the front side surface portion 9b of the crushing recess 9, and a rear curved surface portion 9e that connects the bottom surface portion 9a and the rear side surface portion 9d in a cross-sectionally concave shape is provided between the bottom surface portion 9a and the rear side surface portion 9d. Therefore, in the crushing recess 9, there is no acute angle in the cross section of the continuous portion of the bottom surface portion 9a and the front side surface portion 9b in the direction intersecting with the rotation axis C1 and in the cross section of the continuous portion of the bottom surface portion 9a and the rear side surface portion 9d. Therefore, it is possible to remove the attachment cleanly by preventing a part of the attachment located inside the crushing recess 9 from being clogged between the bottom surface portion 9a and the front side surface portion 9b, or from being clogged between the bottom surface portion 9a and the rear side surface portion 9d and being unable to be removed.

[0072] In addition, since a side curved surface portion 9g that connects the bottom surface portion 9a and the side surface portion 9f in a concave cross section is provided between the bottom surface portion 9a and the side surface portion 9f of the crushing recess 9, the crushing recess 9 has no acute angled portion in the cross section of the continuous portion of the bottom surface portion 9a and the side surface portion 9f in the direction intersecting with the rotation direction of the first electrode roll 6. Therefore, it is possible to prevent the adhesion located inside the crushing recess 9 from being clogged between the bottom surface portion 9a and the side surface portion 9f and becoming unable to be completely removed, and to prevent the adhesion from remaining inside the crushing recess 9.

[0073] Furthermore, since the first electrode roll 6 is an integrally processed product made of steel and has no divided structure, it is possible to prevent a part of the deposit from getting into the mating surface of the divided parts and becoming unable to be completely removed. Therefore, it becomes even more difficult for deposits to adhere to the outer circumferential surface of the first electrode roll 6, and an accurate value can be reliably obtained when detecting the moisture content value.

[0074] In the embodiment of the present invention, the crushing recesses 9 formed in the first electrode roll 6 have the same shape, but this is not limited thereto. For example, the depth of the bottom may be different so as to be able to accommodate two or more types of large diameter grains 10B of different sizes, or multiple types of crushing recesses 9 with different outer dimensions may be provided.

[0075] Furthermore, in the embodiment of the present invention, in the first electrode roll 6, three crushing recesses 9A are formed at equal intervals around the rotation axis C1, and three crushing recesses 9B are formed at equal intervals around the rotation axis C1, but they do not have to be formed at equal intervals.

[0076] In the embodiment of the present invention, six crushing recesses 9 are formed in the first electrode roll 6, but one to five may be formed, or seven or more may be formed.

[0077] In addition, in the embodiment of the present invention, each crushing recess 9 is formed in a staggered pattern on one side and the other side of the direction of the rotation axis C1 in the circumferential direction of the first electrode roll 6, but it is not necessary for them to be formed in a staggered pattern.

[0078] Furthermore, in the embodiment of the present invention, each crushing recess 9 of the first electrode roll 6 is shaped to be open to one side or the other side in the direction of the rotation axis C1, but this is not limited thereto. For example, each crushing recess 9 may be shaped to extend over the entire area of ​​the outer peripheral surface of the first electrode roll 6 in the direction of the rotation axis C1 and to be open on both sides.

[0079] In the embodiment of the present invention, the first electrode roll 6 is an integrally processed product using a steel material, but it may be an integrally processed product using other metal materials. It may also be formed by integral molding using a resin material.

[0080] In the embodiment of the present invention, the crushing recess 9 has a circumferentially symmetrical shape when viewed from the direction of the rotation axis C1, but it does not have to have a circumferentially symmetrical shape.

[0081] In the embodiment of the present invention, the cross-sectional shape of the bottom surface 9a of the crushing recess 9 is formed by one mountain, but the bottom surface 9a may have a cross-sectional shape formed by two or more continuous mountains.

[0082] In addition, in the embodiment of the present invention, the crushing surface 8 of the first electrode roll 6 is knurled, but knurling is not a mandatory requirement, and knurling is not required as long as the small-diameter grains 10A can be crushed.

[0083] In addition, in the embodiment of the present invention, the bottom portion 9a of the crushing recess 9 has a cross-sectional mountain shape with a curved tip position P1, but this is not limited to this, and the tip position P1 may have a cross-sectional mountain shape with an acute angle, and the cross section of the portion relating to the tip position P1 may be angular or curved as long as it is possible to concentrate stress on the large diameter kernel 10B when crushing the large diameter kernel 10B.

[0084] In addition, in the embodiment of the present invention, the bottom portion 9a of the crushing recess 9 has a mountain-shaped cross section, but other shapes may be used as long as they are capable of concentrating stress on the large-diameter kernels 10B when crushing the large-diameter kernels 10B.

[0085] Furthermore, in the embodiment of the present invention, the detection unit 11a of the control panel 11 detects the resistance value between the first electrode roll 6 and the second electrode roll 7 and obtains the moisture content value of the grains 10 by conversion, but this is not limited to the above. The detection unit 11a may detect the voltage value between the first electrode roll 6 and the second electrode roll 7 and obtain the moisture content value of the grains 10 by conversion, or may detect the current value between the first electrode roll 6 and the second electrode roll 7 and obtain the moisture content value of the grains 10 by conversion, or may detect at least one of the values ​​of the current, voltage, and resistance and obtain the moisture content value of the grains 10 by conversion. [Industrial Applicability]

[0086] The present invention is suitable for a moisture meter capable of measuring the moisture content of grains to be dried in a dryer. [Explanation of symbols]

[0087] 1...Moisture meter 2...Main body case 2a...Transparent cover 2b...Grain inlet 3...Moisture detection section 3A...Rotation unit 3B...Drive motor 3C...Gear box 4...Grain feeding unit 5...Rotation transfer section 5a...Shooter 6...First electrode roll 7...Second electrode roll 8...Crushing surface section 9...Crushing recess 9A...Crushing recess 9B...Crushing recess 9a...Bottom section 9b...Front side section 9c...Front curved surface section 9d...Rear side section 9e...Rear curved surface section 9f...Side side section 9g...Side curved surface section 10...Grain 10A...Small diameter grain 10B...Large diameter grain 11...Control panel 11a...Detection section 12...First cleaning unit 12a...First scraper 12b...First brush 13...Second cleaning unit 13a...Second scraper 13b...Second brush C1...rotation axis C2...rotation axis P1...tip position of bottom part S1...accommodation space

Claims

1. A moisture meter comprising a moisture detection unit capable of detecting the moisture content of both small-diameter grains and large-diameter grains having a grain size larger than that of the small-diameter grains, the moisture detection unit having first and second electrode rolls whose rotation axes extend in the same horizontal direction and which rotate in opposite directions to each other to pinch the small-diameter grains or the large-diameter grains with their respective outer circumferential surfaces and crush the small-diameter grains or the large-diameter grains while passing through the first and second electrode rolls, the moisture meter being configured to detect at least one value of a voltage, a current, and a resistance between the first and second electrode rolls when the small-diameter grains or the large-diameter grains are crushed, and to obtain a moisture content value by converting the detected value, The outer peripheral surface of the first electrode roll is provided with a crushing surface portion having a curved surface extending along the circumferential direction and crushing the small-diameter grains between the first electrode roll and the second electrode roll, and one or more crushing recesses having a bottom surface portion recessed so as to be located closer to the rotation axis than the crushing surface portion and crushing the large-diameter grains between the first electrode roll and the second electrode roll while the large-diameter grains are accommodated therein. The moisture meter according to claim 1, wherein the crushing recess is open to at least one of one side and the other side in a rotation axis direction of the first electrode roll.

2. 2. The moisture meter according to claim 1, The crushing recess includes a front side portion provided on the front side of the bottom surface portion in the rotation direction and extending along the rotation axis, and a rear side portion provided on the rear side of the bottom surface portion in the rotation direction and extending along the rotation axis, A front curved surface portion is provided between the bottom surface portion and the front side surface portion, the front curved surface portion connecting the bottom surface portion and the front side surface portion to have a concave cross section, The moisture meter according to claim 1, wherein a rear curved surface portion is provided between the bottom surface portion and the rear side surface portion, the rear curved surface portion connecting the bottom surface portion and the rear side surface portion to have a concave cross-sectional shape.

3. The moisture meter according to claim 1 or 2, The crushing recess is provided on one or the other side of the bottom surface portion in a rotation axis direction and includes a lateral side surface portion extending in a rotation direction of the first electrode roll, A moisture meter comprising: a side curved surface portion provided between the bottom surface portion and the side surface portion, the side curved surface portion connecting the bottom surface portion and the side surface portion with a concave cross section.

4. 2. The moisture meter according to claim 1, A moisture meter, wherein the first electrode roll is an integrally processed product made of a metal material.

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