JP2008092829A - Grain flow detector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grain flow detector with high detection accuracy through avoiding the insufficient turning displacement level of a collision plate in the case of low-grain-flow levels while suppressing varying grain collision angle corresponding to the collision plate's turning displacement even in the case of mounting such an identical detector on grain conveyors considerably differing in grain conveyance flow from each other or using such a detector in works considerably differing in grain flow from each other. <P>SOLUTION: The grain flow detector 100 comprises the collision plate 101 subjected to collision with grains inside a grain flow channel and turning correspondingly to the collision force, a turning member 102 to which the turning displacement level of the collision plate 101 is transmitted, a potentiometer 106 for detecting the turning displacement level of the turning member 102 out of the grain flow channel, and a spring 107 applying turning load onto the collision plate 101. The turning load on the collision plate 101 is made variable based on exchanging the spring 107 with another one. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a grain flow rate detection device that detects the flow rate of a grain in a grain channel such as a threshing sorter.

There is known a grain flow rate detection device that is provided in a threshing sorter or the like and detects the flow rate of a grain. For example, the threshing sorter described in Patent Documents 1 to 3 detects the flow rate of the second reduced grain with a grain flow rate detection device, and automatically controls the opening amount of the grain sieve and chaff sheave according to the detected flow rate. Is configured to do. These grain flow rate detection devices each include a collision plate that rotates in response to a collision with the grain, and a displacement amount detection system that detects a rotational displacement amount of the collision plate by a displacement sensor such as a potentiometer. It has become.
Japanese Utility Model Publication No.4-136031 Japanese Patent No. 2721083 JP-A-9-322640

  By the way, in the grain flow rate detection device of the displacement amount detection method, it is necessary to apply a rotational load in a direction against the collision force with the grain to the collision plate. Such a rotational load can be easily applied by a spring provided inside or outside the displacement sensor. However, if the rotational load is too small, the rotation of the grains corresponding to the rotational displacement of the collision plate On the other hand, there is a problem that the change in the collision angle becomes large and the detection accuracy is lowered. On the other hand, if the rotational load is too large, the amount of rotational displacement of the collision plate is insufficient and the detection accuracy at a low flow rate is lowered. . Therefore, in order to solve these conflicting problems, a neutral rotational load is selected. However, if the neutral rotational load is uniquely determined, there is a possibility that it cannot cope with a change in processing capacity. is there. For example, when the same grain flow rate detection device is installed in a model with a significantly different grain flow rate, or when used for work where the grain flow rate is significantly different, the rotation load of the collision plate is not appropriate, There is a possibility that the detection accuracy is lowered.

The present invention was created for the purpose of solving these problems in view of the above circumstances, and is a kernel flow rate detection device for detecting the flow rate of a kernel, and the inside of the grain flow path. The collision plate that collides with the grain and rotates according to the collision force, the rotation member that transmits the rotation displacement amount of the collision plate, and the rotation displacement of the rotation member outside the grain flow path A displacement sensor for detecting the amount and a spring for applying a rotation load to the collision plate are provided, and the rotation load of the collision plate is changed based on replacement of the spring. In this case, when the same grain flow rate detection device is installed in a model having a greatly different grain flow rate, or when the grain flow rate is greatly different, the collision plate is rotated by replacing the spring. The load can be optimized. As a result, it is possible to avoid an insufficient rotation displacement amount of the collision plate at a low flow rate while suppressing a change in the collision angle of the grain according to the rotation displacement of the collision plate, and to obtain a good detection accuracy.
Further, the rotating member amplifies the amount of rotational displacement of the collision plate and transmits it to the displacement sensor. If it does in this way, even if it is the time of the low flow volume with the small amount of rotation displacement of a collision board, the flow volume of a grain can be detected accurately.

[First embodiment]
Next, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a threshing / sorting device provided with a grain flow rate detection device 100 according to the first embodiment of the present invention, and the threshing / sorting device 1 carries threshing along a handling chamber 2. A feed chain 3, a waste transporting device 5 for transporting threshed stalks to the post-processing unit 4, and a handle room 2 are rotatably mounted, and threshing a processed product (grains including a mixture) from the transported stalks Treatment barrel 6, first receiving net 7 for leaking the processed product threshed here, and processing to reach the end of the handling chamber 2 without leaking from the first receiving net 7 A processing cylinder 8 to be processed, a second receiving network 9 for letting the processed material singulated here leak, and a swing for swinging and sorting the processing material leaked from the first receiving network 7 and the second receiving network 9 A sorting body 10, a compressed air fan 11 for generating a sorting wind in front of the swinging sorting body 10, a first spiral 12 for collecting the first thing, and a second thing are collected. The second spiral 13, the second sorting fan 14 for generating the second sorting wind in front of the second spiral 13, the dust discharge chamber 15 provided above the terminal end of the swing sorter 10, and the dust discharge A dust exhaust fan 16 is provided in the chamber 15 so as to be freely rotatable. And the first thing collected by the first helix 12 is stored in the grain tank 18 via the milled cylinder 17, and the second thing collected by the second helix 13 is passed through the second reducing cylinder 19. Thus, it is reduced onto the rocking sorter 10.

  The oscillating sorter 10 includes an oscillating flow plate 20 that sequentially conveys the processed material leaked from the first receiving net 7 to the rear, and a fin member that juxtaposes a plurality of processed materials at the end of the oscillating flow plate 20. A swing assembly including a chaff sheave 21 for sieving, a granule sheave 22 for sieving the processed material leaked from the chaff sheave 21 with a net member, and a strok rack 23 disposed behind the chaff sheave 21. By a mechanism (crank mechanism, cam mechanism, etc.), it is continuously reciprocated at a predetermined cycle.

  The chaff sheave 21 includes a plurality of fins 21a arranged in parallel at a predetermined interval in the front-rear direction. Each fin 21a is inclined in a front-rear and a rear-high state, and the grains are leaked from the gaps between the fins 21a while the processed material is transferred rearward along with the swing of the swing sorter 10. The chaff sheave 21 of the present embodiment can adjust the gap (fin opening) between the fins 21a, and the processing capability of the rocking sorter 10 is adjusted by adjusting the fin opening. For example, the second reduction port 24 of the second reduction cylinder 19 is provided with the grain flow rate detection device 100 according to the embodiment of the present invention, and the second reduction kernel amount detected by the grain flow rate detection device 100 is determined. The fin opening of the chaff sheave 21 can be automatically controlled so as to be constant. Hereinafter, the structure of the 2nd reduction | restoration cylinder 19 and the grain flow volume detection apparatus 100 is demonstrated with reference to FIGS.

  The second reduction cylinder 19 forms a grain passage for second reduction from the terminal end of the second helix 13 to the second reduction port 24, in which the helix that lifts and conveys the second thing is formed. A carrier 25 is rotatably mounted. Further, at the upper end portion of the helical transport body 25, a discharge plate 26 for throwing the second thing in the outer peripheral direction, and an arc-shaped discharge guide 27 for guiding the thrown second thing toward the second return port 24. The second item conveyed to the upper end of the second reduction cylinder 19 is positively received from the second reduction port 24 by receiving the throwing action of the discharge plate 26 and the guide action of the discharge guide 27. To be released.

  The grain flow rate detection device 100 of the present embodiment is provided so as to detect the grain flow rate in a grain channel (second product discharge channel) formed at the terminal portion of the second reduction cylinder 19. The collision plate 101 that collides with the grain inside the grain flow path and rotates according to the collision force, the rotating member 102 to which the amount of rotational displacement of the collision plate 101 is transmitted, the collision plate 101, A fulcrum shaft 103 that rotatably supports the rotation member 102, a bearing holder 105 that supports the fulcrum shaft 103 via a bearing 104, and a rotational displacement amount of the rotation member 102 outside the grain channel. A potentiometer (displacement sensor) 106, a spring 107 that applies a rotational load to the collision plate 101, and a stopper 108 that defines the initial position of the rotational member 102.

  More specifically, the top plate 28 (partition wall) of the second reduction cylinder 19 is formed with a mounting hole 28a of the grain flow rate detection device 100, and the bearing holder 105 is closed so as to close the mounting hole 28a. It is attached. The fulcrum shaft 103 supported by the bearing holder 105 penetrates the top plate 28 through the mounting hole 28a, and one end of the collision plate 101 is connected to one end of the fulcrum shaft 103 located inside the grain flow path. While fixed integrally, the base end part of the rotation member 102 is integrally fixed to the other end part of the fulcrum shaft 103 located outside the grain flow path. In the present embodiment, by arranging the collision plate 101 along the extension line of the discharge guide 27, grains having a relatively stable flow direction are caused to collide with the collision plate 101. A blower device 29 is provided on the back side of the discharge guide 27, and the air collected by the blower device 29 is blown away toward the sorting chamber.

  The rotating member 102 of the present embodiment is configured by a fan gear, and a pinion gear 109 provided on an input shaft (not shown) of the potentiometer 106 is engaged with an arcuate gear portion formed at the tip. That is, when the collision plate 101 rotates according to the collision with the grain, the rotation member 102 also rotates integrally, and the arcuate gear portion at the tip rotates the pinion gear 109. Thereby, the amount of rotational displacement of the collision plate 101 according to the collision with the grain is detected by the potentiometer 106. Further, the length dimension (diameter dimension) of the rotating member 102 and the gear ratio between the arcuate gear portion and the pinion gear 109 amplify the rotational displacement amount of the collision plate 101 transmitted to the potentiometer 106 as much as possible. It is preferable to set so. If it does in this way, even if it is the time of the low flow volume with the small amount of rotation displacement of the collision board 101, it will become possible to detect the flow volume of a grain with sufficient precision. Note that the base end portion of the rotation member 102 has a boss portion 102 a that is fitted on the fulcrum shaft 103 so as not to rotate. The bolt 110 and the washer 111 to be screwed in are secured.

  The stopper 108 is separate from the bearing holder 105 and is individually attached to the top plate 28. A first stopper piece 108a is provided at one end of the stopper 108, and the initial position of the rotating member 102 is defined by contact with the first stopper piece 108a. A second stopper piece 108b is provided at the other end portion of the stopper 108, and the other end portion of the spring 107 is locked by contact with the second stopper piece 108b.

  The spring 107 according to the present embodiment is a torsion coil spring, and is attached to the outer peripheral portion of the boss portion 102 a of the rotating member 102. One end of the spring 107 is engaged with an engagement hole 102 b formed in the rotating member 102, and the other end is locked by the second stopper piece 108 b of the stopper 108. When the spring 107 is provided in this way, a rotation load is applied to the collision plate 101 via the rotation member 102 and the fulcrum shaft 103.

  In the grain flow rate detection device 100 according to the present invention, the rotational load of the collision plate 101 is changed based on the replacement of the spring 107. For example, in this embodiment, when the bolt 110 is removed, the rotating member 102 and the spring 107 are detached from the fulcrum shaft 103, so that the spring 107 having a different spring force can be replaced. In this case, when the same grain flow rate detection device 100 is mounted on a model in which the grain flow rate is greatly different, or when the same grain flow rate detection device 100 is used for work where the grain flow rate is greatly different, By replacing the spring 107, the rotational load of the collision plate 101 can be optimized. As a result, while suppressing the change in the collision angle of the grain according to the rotational displacement of the collision plate 101, the shortage of the rotational displacement amount of the collision plate 101 at a low flow rate is avoided, and good detection accuracy is obtained. Become.

  Moreover, as shown in FIG. 1, the threshing sorting apparatus 1 of this embodiment is provided with the 3rd sensor 30 which detects the quantity of the 3rd scattered grain. The third sensor 30 is composed of a sheet-like or plate-like pressure sensor, and is attached to the rear wall surface of the dust removal chamber 15 via a mounting rubber 31 so as to detect the collision force of the grains. However, since the collision energy of the grains to be detected is very small, the sensor output is also small, and there is a problem that it is difficult to distinguish from noise (collision energy and wind pressure of debris such as straw). This is because the pressure sensor used as the third sensor 30 detects the deformation of the sensor itself, and a large deformation cannot be caused in the pressure sensor due to the collision of the grains.

  Therefore, in the present embodiment, as shown in FIG. 6, the mounting rubber 31 supporting the back surface of the third sensor 30 has a hole 31 a (or a recess) to avoid contact with the back surface of the third sensor 30. Is forming. That is, the third sensor 30 is difficult to be deformed even if the grain collides when the entire rear surface is in contact with the mounting rubber 31, but if a space is secured behind the hole 31 a, the third sensor 30. This makes it possible to detect the collision force of the grains with high accuracy.

  As shown in FIG. 6A, the shape and dimensions of the hole 31a formed in the mounting rubber 31 may be determined without taking into account the shape and dimensions of the grains and sawdust, As shown in B) and (C), it is preferable to form a large number of holes 31a having a diameter A that is larger than the grain size L1 and smaller than the size L2 of the sawdust. In this way, it is possible to promote the deformation of the third sensor 30 due to the collision of the grains and accurately detect the amount of the third scattered particles while suppressing the deformation of the third sensor 30 due to the collision of the sawdust. become.

  The grain flow rate detection device 100 of the present embodiment configured as described above collides with the grain inside the grain flow path, and rotates according to the collision force. A rotation member 102 to which the amount of dynamic displacement is transmitted, a potentiometer 106 for detecting the amount of rotation displacement of the rotation member 102 outside the grain flow path, and a spring 107 for applying a rotation load to the collision plate 101 Since the rotation load of the collision plate 101 is changed based on the exchange of the spring 107, when the same grain flow rate detection device 100 is mounted on a model in which the grain flow rate is greatly different, When the same grain flow rate detection device 100 is used for work in which the grain flow rate is greatly different, the rotation load of the collision plate 101 can be optimized by replacing the spring 107. As a result, while suppressing a change in the collision angle of the grain according to the rotational displacement of the collision plate 101, a shortage of the rotational displacement amount of the collision plate 101 at a low flow rate is avoided, and good detection accuracy is obtained.

  Further, since the rotation member 102 is configured to amplify the rotation displacement amount of the collision plate 101 and transmit it to the potentiometer 106, even when the collision plate 101 has a small rotation displacement amount and a low flow rate. There is an advantage that the flow rate of the grain can be detected with high accuracy.

[Second Embodiment]
Next, the grain flow rate detection device 200 according to the second embodiment of the present invention will be described with reference to FIG. However, about the structure common to the said embodiment, the same code | symbol as the said embodiment is attached | subjected and description of the said embodiment is used.
As shown in FIG. 7, the grain flow rate detection device 200 according to the second embodiment is a displacement sensor that detects a rotational displacement amount of the rotational member 202 and a point that the rotational member 202 is configured by an arm member. The point which uses the stroke sensor 206 is different from the said embodiment. Specifically, the detection rod 206a of the stroke sensor 206 is connected to the distal end portion of the rotating member 202 made of an arm member, and the displacement amount of the distal end of the rotating member 202 is detected.

  Even in the grain flow rate detection device 200 of the second embodiment configured as described above, the rotational load of the collision plate 101 is changed by replacing the spring 107 as in the case of the grain flow rate detection device 100 of the first embodiment. The effect that it can be optimized is obtained. Further, even if the rotating member 102 is constituted by an arm member, the amount of rotation displacement of the collision plate 101 can be amplified and transmitted to the stroke sensor 206, so that the low flow rate with a small amount of rotation displacement of the collision plate 101 is small. Even at times, the flow rate of the grains can be detected with high accuracy.

  Of course, the present invention is not limited to the above-described embodiment. For example, the use of the grain flow rate detection device of the present invention is not limited to the flow rate detection of the second reduced grain, and various It can be applied to flow rate detection in a grain flow path. Needless to say, the displacement sensor for detecting the rotational displacement amount of the rotational member is not limited to the potentiometer and the stroke sensor.

[First Reference Example]
Next, the grain flow rate detection apparatus 300 according to the first reference example will be described with reference to FIG. As shown in FIG. 8, the grain flow rate detection device 300 according to the first reference example supports a collision plate 301 that collides with the grain inside the grain flow channel, and the collision plate 301 within the grain flow channel. The flexible member 302 includes a rubber plate 303 stretched in a hole that communicates with the inside and outside of the grain channel, and a stroke sensor 304 that is disposed outside the grain channel.

The collision plate 301 has a protrusion 301 a on the back surface, and the tip of the collision plate 301 is in contact with the detection rod 304 a of the stroke sensor 304 via the rubber plate 303.
The bending member 302 is a member that allows displacement of the collision plate 301 according to the collision force of the grains by bending deformation (elastic deformation), but has a relatively strong spring force in order to suspend and support the collision plate 301. A leaf spring or the like is used.
The rubber plate 303 is a member that transmits the amount of displacement of the collision plate 301 to the stroke sensor 304 while closing the hole in the partition wall, but a relatively thick one is used to ensure a certain degree of durability. The

Even in the grain flow rate detection device 300 of the first reference example configured as described above, the displacement amount of the collision plate 301 can be detected by the stroke sensor 304 disposed outside the grain flow path.
However, in the grain flow rate detection device 300 of the first reference example, in order to suspend and support the collision plate 301, it is necessary to configure the bending member 302 with a plate spring or the like having a relatively strong spring force. There is a problem with the detection accuracy.
Further, since the stroke sensor 304 detects a collision force via the rubber plate 303, there is a problem that detection accuracy is lowered due to elastic deformation of the rubber plate 303.

[Second Reference Example]
Next, the grain flow rate detection apparatus 400 according to the second reference example will be described with reference to FIG. However, the same reference numerals as those in the reference example are given to configurations common to the reference example, and the description of the reference example is incorporated.
As shown in FIG. 9, the grain flow rate detection device 400 according to the second reference example is different from the first reference example in that the displacement amount of the collision plate 301 is detected by a potentiometer 404. Specifically, a potentiometer 404 is disposed outside the grain flow path, and its detection arm 404 a is brought into contact with the outer surface of the rubber plate 303.

Even in the grain flow rate detection device 400 of the second reference example configured as described above, the displacement amount of the collision plate 301 can be detected by the potentiometer 404 arranged outside the grain flow path.
However, in the grain flow rate detection device 400 of the second reference example, in order to suspend and support the collision plate 301, it is necessary to configure the bending member 302 with a leaf spring having a relatively strong spring force, as in the first reference example. Therefore, there is a problem in detection accuracy at a low flow rate.
Further, since the potentiometer 404 detects a collision force via the rubber plate 303, there is a problem that detection accuracy is lowered due to elastic deformation of the rubber plate 303.

It is an internal side view of a threshing sorter. It is a side view of the 2nd reduction cylinder provided with the grain flow rate detection device concerning a first embodiment. It is A arrow sectional drawing of the 2nd reduction | restoration cylinder provided with the grain flow volume detection apparatus which concerns on 1st embodiment. It is a top view of the grain flow rate detection apparatus concerning a first embodiment. It is sectional drawing of the grain flow rate detection apparatus which concerns on 1st embodiment. (A) The front view which shows the rubber | gum for mounting of a 3rd sensor, (B) is a front view which shows the other example of the rubber | gum for mounting, (C) is explanatory drawing which shows the dimensional relationship with a grain or a koji. It is a top view of the grain flow rate detection apparatus which concerns on 2nd embodiment. It is a side view of the grain flow rate detection apparatus which concerns on a 1st reference example. It is a side view of the grain flow rate detection apparatus which concerns on a 2nd reference example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Threshing sorting device 19 Second reduction cylinder 24 Second reduction port 25 Spiral carrier 26 Release plate 27 Release guide 28 Top plate 29 Blower 100 Grain flow rate detection device 101 Collision plate 102 Rotating member 103 Support shaft 106 Potentiometer 107 Spring 200 Grain flow rate detection device 202 Rotating member 206 Stroke sensor

Claims (2)

A grain flow rate detection device for detecting a grain flow rate,
A collision plate that collides with the grain inside the grain flow path and rotates according to the collision force;
A rotating member to which the rotational displacement amount of the collision plate is transmitted;
A displacement sensor that detects the amount of rotational displacement of the rotational member outside the grain flow path;
A grain flow rate detection device comprising: a spring for applying a rotational load to the collision plate; and the rotation load of the collision plate is changed based on the exchange of the spring.   The grain flow rate detection device according to claim 1, wherein the rotating member amplifies a rotational displacement amount of the collision plate and transmits the amplified displacement amount to the displacement sensor.

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