JP5693275B2 - Moisture measuring device - Google Patents

Description

  The present invention relates to a moisture measuring device that measures the moisture value of a grain, and more particularly to a moisture measuring device that measures the moisture value of a grain having a relatively large particle size such as soybean.

  As a moisture measuring device, a pair of electrode rolls made of a conductive metal material is used, and by detecting the resistance value of the current flowing between the pair of electrode rolls while crushing the grain between the pair of electrode rolls, the grain An apparatus for measuring the moisture value of is known. In such a moisture measuring device, when measuring the moisture value of a grain having a relatively large particle size such as soybean, the roll diameter of the electrode roll is not sufficiently large relative to the grain, or between the electrode rolls When the gap is narrow, the grain supplied from above between the pair of electrode rolls may slip freely between the electrode rolls, and the measurement may be impossible.

  Therefore, a pressing plate and an elevating mechanism for moving the pressing plate up and down are provided, and the pressing of the grain between the pair of electrode rolls by the pressing plate ensures that the grain is bitten. A moisture measuring device has been proposed (see, for example, Patent Document 1).

JP 2002-228614 A

  In recent years, in order to measure variation in individual moisture values, moisture measuring devices that supply grains one by one to a pair of electrode rolls and measure the grain moisture value one by one have been used. In such a moisture measuring device for single grain measurement, grains are supplied one by one to a pair of electrode rolls, and therefore measurement cannot be performed if the supplied grains spill from between the pair of electrode rolls. . Then, it is possible to provide the guide member which prevents the grain supplied to a pair of electrode rolls from falling out.

  However, when using a pressing plate that presses the grain between a pair of electrode rolls as in the prior art, the guide member is arranged to avoid the movement region of the pressing plate. Since it is necessary to move the pressing plate to the vicinity between the pair of electrode rolls in order to put one grain between the electrode rolls, the guide member cannot be disposed in the vicinity between the pair of electrode rolls. Therefore, the guide member cannot effectively cover grain spillage, and there is a problem that the frequency of grain spillage increases and the measurement rate decreases.

  For this reason, even in the case of using a pressing plate that presses the grain toward the pair of electrode rolls in the moisture measuring device that measures the moisture value of the grain one by one, the grain from the pair of electrode rolls. There is a problem of reducing the frequency of spilling.

  The present invention has been made in view of such a situation, and in a moisture measuring device that measures the moisture value of a grain one by one, a pressing member that presses the grain between a pair of electrode rolls is used. Even if it exists, it aims at providing the moisture measuring apparatus which can make low the frequency which a grain spills from a pair of electrode roll.

The moisture measuring device of the present invention is a moisture measuring device for measuring the moisture value of grain, a pair of electrode rolls that crush the grain by rotation and detect the resistance value of the current through the crushed material, a supply means for supplying the grain between the pair of the electrode rolls, a pressing member which presses push toward the grain supplied by said supply means between the pair of the electrode rolls, the rotation of the electrode roll rocking A link mechanism that converts the movement into dynamic motion and swings the pressing member, and is disposed close to the release end side of the pair of electrode rolls and perpendicular to the roll axis of the electrode rolls, by the supply means A spill prevention plate that prevents the supplied grain from spilling from the gap between the pair of electrode rolls toward the release end , and the spill prevention plate is swung together with the pressing member by the link mechanism. Ruko The features.
Furthermore, in the moisture measuring apparatus according to claim 2, the link mechanism converts the rotation of one of the electrode rolls into a swinging motion, and moves the spill prevention plate around the roll axis of the other electrode roll. It is characterized by rocking.

  The moisture measuring device of the present invention includes a pressing member that presses the grain between a pair of electrode rolls, a link mechanism that converts the rotation of the electrode rolls into a swinging motion and swings the pressing member, and a pair of An anti-spill plate that prevents grains from spilling from between the electrode rolls, and the anti-spill plate is configured to be swung together with the press member by a link mechanism. There is no need to take into account interference. Accordingly, the degree of freedom in designing the shape of the spill prevention plate is increased, and it is possible to cover up to the vicinity of the pair of electrode rolls, and the grains supplied one by one to the pair of electrode rolls spill out without being measured. The effect that it can prevent effectively is produced. Further, since the rotation of the electrode roll is converted into a swinging motion, the pressing member and the spill prevention plate can be swung without providing a special drive source. Further, even if foreign matter is supplied, the spillage prevention plate is swung, so that the spillage prevention plate is removed without being caught.

  Furthermore, the moisture measuring device of the present invention converts the rotation of one electrode roll into a swinging motion by a link mechanism, and swings the spillage prevention plate about the roll axis of the other electrode roll. The spill prevention plate can be swung in a state close to the roll, and the spill prevention plate can cover the vicinity of the pair of electrode rolls.

It is front sectional drawing which shows the structure of the grain dryer in which embodiment of the moisture measuring apparatus which concerns on this invention is used. It is a figure which shows the structure of embodiment of the moisture measuring apparatus which concerns on this invention, (a) is a perspective view which shows the whole structure in the state which closed the cover movable part, (b) is the enlarged front view. It is sectional drawing which shows the state in which the moisture measuring apparatus shown in FIG. 2 was attached to the elevator of the grain dryer. It is a perspective view which shows the structure of the electrode roll shown in FIG. 3, a link mechanism, a press member, and a spill prevention board. It is explanatory drawing for demonstrating operation | movement of the link mechanism shown in FIG. 4, a press member, and a spill prevention board. It is explanatory drawing explaining the positional relationship of the press member shown in FIG.

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

  The moisture measuring device 10 of the present embodiment is used by being attached to a grain dryer 20 as shown in FIG. The grain dryer 20 is a grain dryer that can be used for drying grains K having a relatively large particle size, such as soybeans. The grain dryer 20 includes a grain tank 21 in the upper part of the body 20A having a rectangular parallelepiped box shape, and the lower part. Is provided with a pair of exhaust passage partition walls 22 inclined downward in a funnel shape toward the center in the width direction. Inside the exhaust passage partition 22, a wind tunnel plate 23 constituting the air passage 23 a and a pair of air guide passage partitions 24 constituting the air guide passage 24 a on both sides in the width direction of the air passage 23 a are provided. Yes.

  Between the wind tunnel plate 23, the air guide partition wall 24 and the exhaust channel partition 22, there is a grain flow path 25 through which the grain K stored in the grain tank 21 flows down. The air passage 23a and the air guide passage 24a are supplied with normal temperature outside air during the tension operation, circulation operation, or discharge operation, and hot air generated by a burner (not shown) during the drying operation. The air is blown into the grain flow channel 25 through the openings formed in the wind tunnel plate 23 and the air guide partition wall 24.

  Below the exhaust passage partition wall 22, a pair of extension flow plates 26 extend downwardly in a funnel shape toward the center in the width direction of the machine body 20 </ b> A. The lower end of the grain flow path 25 is opened and closed during rotation, drying, and discharge operations as the shutter drum 27 rotates, and the grain K in the grain flow path 25 is discharged into the lower screw conveyor 29.

  The grain K is stretched from the tension hopper 28 opened at the side surface in the width direction of the machine body 20A to the machine body 20A during the tension operation. When the grain K stretched from the stretcher hopper 28 flows into the lower transport bar 29a of the lower screw conveyor 29 from between the lower ends of the stretcher plate 26, the lower screw 29b passes the lower transport bar 29a outside the machine body 20A. It is conveyed to the lower part of the elevator 30 standing upright.

  In the elevator 30, an endless belt 30 b to which buckets 30 a are attached at regular intervals rotates during each operation of stretching, circulation, drying, and discharging, and the grain K conveyed to the lower part of the elevator 30 is stored in the bucket 30 a. After being lifted and conveyed to the upper end, it is caused to flow down to the upper conveying rod 31a of the upper screw conveyor 31.

  When the grain K is conveyed in the upper conveying basket 31a by the upper screw 31b, it flows down to the upper surface of the leveling machine 32 at the center of the grain dryer 20 in the front-rear direction, and the grain tank is rotated by the centrifugal force of the rotating classifier 32. 21 evenly dissipated and distributed. During the discharging operation, one end of the upper transport basket 31a is communicated with a discharge pipe (not shown), and the grain K flowing down to the upper transport basket 31a is discharged from the grain dryer 20 through the discharge pipe.

  The moisture measuring device 10 of the present embodiment is attached to the side plate of the elevator 30. The moisture measuring device 10 is for measuring the moisture value of the grain K. As shown in FIGS. 2 and 3, a pair of supply screws 14 having conveying grooves on the outer peripheral surface are provided in the mounting frame 11. Are arranged side by side. The moisture measuring device 10 includes an opening 30c that is inserted into the pair of rails (not shown) provided on the side plate of the elevator 30 and the left and right edges of the mounting frame 11 and is open to the side plate located between the rails. The mounting frame 11 is fixed to the side plate with screws (not shown).

  As shown in FIG. 3, the moisture measuring device 10 is positioned in the vicinity of the bucket 30 a where the tip of the supply screw 14 is conveyed upward while the tip of the supply screw 14 is directed to the opening 30 c formed in the elevator 30. Thus, it is attached to the elevator 30. As a result, the grain K dropped from the bucket 30a during the upward conveyance is accumulated in the conveyance groove 14a between the two supply screws 14, and the accumulated grain K is collected by the drive device stored in the apparatus main body 12 (see FIG. 2). As the supply screw 14 is rotated, the conveyance groove 14a is moved backward.

  As shown in FIGS. 2 and 3, a partition cover 13 is attached to the inner surface of the attachment frame body 11, and a space surrounded by the attachment frame body 11 and the partition cover 13 measures the moisture value of the grain K. Region 15 is formed. The supply screw 14 extends forward of the partition cover 13 through a through hole 13a formed in the partition cover 13, and the grain K accommodated in the conveyance groove 14a of the supply screw 14 is conveyed as the supply screw 14 rotates. The groove 14a is moved rearward and moved into the measurement region 15 through the through hole 13a.

  2 and 3, the partition cover 13 is provided with an upper partition cover 16 that regulates the transport amount of the grain K moving through the transport groove 14 a, and an opening between the transport groove 14 a and the upper partition cover 16. The part becomes an entrance part 17 to the measurement region 15. The inlet portion 17 is set to have a passing diameter slightly larger than the grain size of the grain K to be measured, and is formed to have a size through which one grain passes. As a result, the amount of the grain K that moves in the conveyance groove 14 a is regulated by the inlet portion 17, and the grains are moved into the measurement region 15 one by one.

  3 and 4, a pair of electrode rolls 1 a and 1 b that crush the grain are provided in the measurement region 15. The pair of electrode rolls 1a and 1b are arranged below the pair of supply screws 14, and the grains moved in the measurement region 15 by moving the conveying groove 14a are separated between the pair of electrode rolls 1a and 1b one by one. To be supplied.

  The pair of electrode rolls 1a and 1b are made of a conductive metal material and function as a pair of electrodes of a measurement circuit (not shown). Further, the pair of electrode rolls 1a and 1b are respectively attached to roll shafts 2a and 2b that are pivotally supported at horizontal positions on the attachment frame 11 so that the circumferential surfaces thereof are opposed to each other in the horizontal direction at a predetermined roll interval. It has been. The distance between the electrode rolls 1a and 1b is set to be sufficiently smaller than the grain size of the grain to be measured, and from the open end side (front) formed by the upper peripheral surfaces facing the electrode rolls 1a and 1b. A substantially V-shaped region (a region indicated by an arrow A in FIG. 4) as viewed serves as a receiving portion for the grains supplied one by one. The distance between the electrode rolls 1a and 1b can be adjusted according to the grain to be measured. For example, when the grain to be measured is soybean, the distance is set to a minimum of about 0.3 mm, and the particle size at the time of crushing -It may be configured so that the width can be set appropriately according to the hardness.

  The pair of electrode rolls 1a and 1b are rotationally driven in the direction indicated by the arrow in FIG. 4, that is, the circumferential surfaces facing the electrode rolls 1a and 1b move downward, and the rotation speed of the electrode roll 1a is It is set so as to be greater than, for example, twice the number of rotations of the electrode roll 1b. Moreover, the fine uneven | corrugated shape which is not shown in figure is formed in each surrounding surface of the electrode rolls 1a and 1b, and the grain supplied one grain from the supply screw 14 is between the electrode rolls 1a and 1b. The moisture content of the grain is measured by detecting the resistance value of the current that flows between the pair of electrode rolls 1a and 1b through the crushed material by crushing so as to be crushed by the peripheral speed difference.

  A rotating brush 3 whose opposing peripheral surface moves in the opposite direction is in contact with the peripheral surface of the electrode roll 1a, and is configured to remove the crushed material adhering to the peripheral surface. Further, a fixed-type scraper 4 with a brush is in contact with the peripheral surface of the electrode roll 1b, and is configured to remove the crushed material adhering to the peripheral surface. In addition, although the rotary brush 3 with larger removal capability than the scraper 4 with a brush was used with respect to the electrode roll 1a, if there is no problem in removal capability, you may use the scraper 4 with a brush with respect to the electrode roll 1a. If there is no problem in cost, the rotating brush 3 may be used for the electrode roll 1b.

  Moreover, in FIG. 3 and FIG. 4, in the measurement area | region 15, the pressing member 5 which presses a grain toward a pair of electrode roll 1a, 1b, and a grain is between a pair of electrode rolls 1a, 1b. A spill prevention plate 6 that prevents spillage and a link mechanism that moves the pressing member 5 and the spill prevention plate 6 using rotation of the electrode roll 1a are provided.

  The link mechanism for moving the pressing member 5 includes a crank pin 51 erected at a position eccentric from the roll shaft 2a at the open end of the electrode roll 1a, a crank 52 that rotates around the roll shaft 2b of the electrode roll 1b, The connecting link 53 connects the crank pin 51 and the release end side of the crank 52. As a result, the crank 52 swings left and right as shown by arrows A and B in FIGS. 5A and 5B with respect to one rotation of the electrode roll 1a.

  A pressing member 5 and a spill prevention plate 6 are attached to the crank 52, and as shown by arrows A and B in FIGS. 5 (c) and 5 (d), the crank 52 is swung right and left together. . 5C and 5D show a state in which the crank 52 and the connecting link 53 are excluded for the sake of explanation.

  The pressing member 5 is a rod-like member extending on the peripheral surface of the electrode roll 1b, moves along the peripheral surface of the electrode roll 1b, and is swung to the leftmost side as shown in FIG. 5 (a). Then, when moving in the direction of arrow A, the grain is directed between the electrode rolls 1a and 1b so as not to block the upper part between the electrode rolls 1a and 1b. Press.

  The oscillation cycle of the pressing member 5 is set to be the same as or shorter than the cycle in which the grain is supplied from the supply screw 14. That is, in the supply screw 14, since the grain is moved along the conveying groove, the grain is supplied as the supply screw 14 rotates. Therefore, by setting the rotation cycle of the electrode roll 1 a and the rotation cycle of the supply screw 14, it is possible to set the oscillation cycle of the pressing member 5 and the cycle in which the grain is supplied from the supply screw 14. Thereby, before the next grain is supplied, the grain supplied one by one between the electrode rolls 1a and 1b is reliably crushed and measured one by one by pressing the pressing member 5, and the grain is measured. One grain can be sampled (collected), and the electrical resistance value measured for each grain can be converted to measure the moisture value for each grain. Thus, by measuring the moisture value of each grain, the average moisture value and variation of the grain K embedded in the grain dryer 20 can be calculated by statistical processing. It becomes possible to control the drying of the grain K in the machine 20.

  The cross-sectional shape of the pressing member 5 is a drop shape in which one is pointed and the other is rounded, and the pointed point is located on the upstream side in the rotation direction of the electrode roll 1b. Referring to FIG. 6 (a), the gap W between the pointed tip and the electrode roll 1b is set to be narrower than 1/2 of the grain size Y of the grain to be measured, and the electrode roll 1b is pressed against the electrode roll 1b. The grain is prevented from entering the gap with the member 5.

  FIG. 6B shows a state where the pressing member 5 is swung to the rightmost side, and the pressing member 5 is closest to the electrode rolls 1a and 1b. The space X formed between the pressing member 5 and the electrode rolls 1a and 1b is set so that the grain to be measured does not fit, that is, the volume of the space X is smaller than the volume of the grain to be measured. Thus, the grain supplied from the supply screw 14 can be surely engulfed between the electrode rolls 1 a and 1 b by the pressing of the pressing member 5.

  The spill prevention plate 6 is a plate for preventing the grain supplied from the supply screw 14 from spilling from the open end side of the electrode rolls 1a and 1b, and is close to the open end side of the electrode rolls 1a and 1b. And it arrange | positions perpendicularly | vertically with respect to roll axis | shaft 2a, 2b. Since the spill prevention plate 6 is swung together with the pressing member 5, the spill preventing plate 6 naturally does not interfere with the pressing member 5, and can adopt a free shape as long as it does not interfere with other members (crank pins 51 and the like). . Therefore, in this Embodiment, it is comprised so that the spill prevention board 6 may always cover the V-shaped area | region formed in the surrounding surface of electrode roll 1a, 1b which is a location where a grain is most likely to spill. Yes. That is, as shown in FIG. 5 (c), the electrode roll can be swung to the leftmost or even to the rightmost as shown in FIG. 5 (d). V-shaped regions formed on the peripheral surfaces of 1a and 1b, that is, regions where grains are supplied, are always covered by the spill prevention plate 6, and the grains supplied one by one from the supply screw 14 are measured. It is possible to effectively prevent spilling without any trouble.

  In order to prevent spillage, it is conceivable to provide a guide to the electrode rolls 1a and 1b, called a chute, and a funnel-shaped guide member for preventing spillage, etc. In this embodiment, the spillage prevention plate 6 is also a pressing member in order to avoid interference due to the swinging of the pressing member 5 that bites in the grains and to prevent the foreign matter from being caught on the fixedly provided guide member and the like. 5 is configured to swing together. Accordingly, the swinging of the pressing member 5 does not interfere with the spill prevention plate 6, and further, impurities are removed without being caught by the swing of the spill prevention plate 6. In addition, although the spill prevention plate 6 was provided only on the open end side, the gap between the electrode rolls 1a and 1b and the mounting frame 11 is large, and there is a possibility that the grains may fall from the root side of the electrode rolls 1a and 1b. In some cases, a spill prevention plate 6 may be provided on the base side.

  As described above, according to the present embodiment, the pressing member 5 that presses the grain between the pair of electrode rolls 1a and 1b, and the rotation of the electrode roll 1a is converted into a swinging motion and pressed. A link mechanism that swings the member 5 and a spillage prevention plate 6 that prevents the grain from spilling from between the pair of electrode rolls 1a and 1b are provided. By being configured to swing together, it is not necessary to consider the interference between the spill prevention plate 6 and the pressing member 5. Accordingly, the degree of freedom in designing the shape of the spill prevention plate 6 is increased, and it is possible to cover up to the vicinity of the pair of electrode rolls 1a and 1b, and the grains supplied one by one to the pair of electrode rolls 1a and 1b are measured. It is possible to effectively prevent spilling without being performed. Further, since the rotation of the electrode roll 1a is converted into a swing motion, the pressing member 5 and the spill prevention plate 6 can be swung without providing a special drive source. Furthermore, even if foreign matter is supplied, the spillage prevention plate 6 is swung, so that the spillage prevention plate 6 is less likely to get caught.

  Furthermore, according to the present embodiment, the link mechanism converts the rotation of one electrode roll 1a into a swinging motion, and the pressing member 5 and the spill prevention plate 6 are centered on the roll shaft 2b of the other electrode roll 1b. The spill prevention plate 6 can be swung in the state of being close to the electrode rolls 1a and 1b, and the spill prevention plate 6 can cover the vicinity of the pair of electrode rolls 1a and 1b. There is an effect.

  Note that the present invention is not limited to the above-described embodiments, and it is obvious that the embodiments can be appropriately changed within the scope of the technical idea of the present invention. In addition, the number, position, shape, and the like of the constituent members are not limited to the above-described embodiment, and can be set to a number, position, shape, and the like that are suitable for implementing the present invention. In each figure, the same numerals are given to the same component.

DESCRIPTION OF SYMBOLS 1a, 1b Electrode roll 2a, 2b Roll axis | shaft 3 Rotating brush 4 Scraper with brush 5 Press member 6 Spill prevention plate 10 Moisture measuring device 11 Mounting frame 12 Device main body 13 Partition cover 13a Through-hole 14 Supply screw 14a Conveying groove 15 Measurement area 16 Upper partition cover 17 Entrance 20 Grain dryer 20A Machine body 21 Grain tank 22 Drainage partition wall 23 Wind tunnel plate 23a Air duct 24 Air duct partition 24a Air duct 25 Grain flow channel 26 Stretching plate 27 Shutter drum 28 Tightening hopper 29 Lower screw conveyor 29a Lower conveying rod 29b Lower screw 30 Elevator 30a Bucket 30b Endless belt 31 Upper screw conveyor 31a Upper conveying rod 31b Upper screw 32 Equalizer 51 Crank pin 52 Crank 53 Connection link

Claims (2)

A moisture measuring device for measuring the moisture value of grain,
A pair of electrode rolls that crush the grains by rotation and detect the resistance value of the current through the crushed material,
Supply means for supplying the grain between a pair of the electrode rolls;
A pressing member which presses push toward the grain supplied by said supply means between the pair of the electrode rolls,
A link mechanism that converts the rotation of the electrode roll into a swinging motion to swing the pressing member;
Proximal to the open end side of the pair of electrode rolls, and arranged perpendicular to the roll axis of the electrode roll, the grain supplied by the supply means is between the pair of electrode rolls to the open end side With a spill prevention plate that prevents spillage,
The spill prevention plate is swung together with the pressing member by the link mechanism.   The link mechanism converts the rotation of one of the electrode rolls into a swinging motion, and swings the pressing member and the spillage prevention plate about a roll axis of the other electrode roll. Item 1. A moisture measuring apparatus according to Item 1.

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