JP2008092830A - Apparatus for detecting flow rate of grain - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for detecting the flow rate of grain by detecting the impact force of grain to a colliding plate by a load measuring sensor, with which a small-sized and inexpensive load measuring sensor such as a pressure-sensitive sensor, etc., is used and the troubles of the sensor caused by collision with grain and dust in a grain flow path are avoided. <P>SOLUTION: The apparatus 100 for detecting the flow rate of grain includes the colliding plate 101 colliding with grain in the inside of the grain flow path, a rotary member 102 to which the impact force acting on the impinging plate 101 is transmitted as a rotary force, a fulcrum shaft 103 for rotatably supporting the rotary member 102, and the pressure-sensitive sensor 104 for detecting the rotary force of the rotary member 102 at the outside of the grain flow path. <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 and 2 detects the flow rate of the second reduced grain with a grain flow rate detection device, and automatically controls the opening amount of the chaff sheave according to the detected flow rate. It is configured.

However, each of the grain flow rate detection devices described in Patent Documents 1 and 2 includes a collision plate that rotates in response to a collision with the grain, and a displacement sensor such as a potentiometer for the amount of rotation displacement of the collision plate. Therefore, there is a problem that the detection accuracy is lowered due to the change in the collision angle of the grain according to the rotational displacement of the collision plate.
In addition, the displacement detection type grain flow rate detection device has a problem in detection accuracy at a low flow rate because a strong spring is used to apply a rotational load to the collision plate.

Therefore, the present inventors have proposed in the past a grain flow detection device of a collision force detection system that directly detects the collision force (see Patent Document 3). According to such a grain flow rate detection device, since the angle of the collision plate hardly changes, a decrease in detection accuracy due to a change in the collision angle of the grain can be avoided, and a spring for urging the collision plate becomes unnecessary. Therefore, good detection accuracy can be obtained even at a low flow rate.
Japanese Patent No. 2721083 JP-A-9-322640 Japanese Patent Laid-Open No. 2005-130776

  However, as described in Patent Document 3, in order to directly detect the collision force, an expensive load measurement sensor such as a large load cell is required, which causes a new problem that the price of the grain flow rate detection device is increased. It was. In addition, when directly detecting the collision force, it is necessary to arrange at least a part of the sensor in the grain flow path, so troubles may occur in the sensor due to the collision of the grains or dust in the grain flow path. There was a risk of occurrence.

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. A collision plate that collides with the grain, a rotating member that transmits the collision force acting on the collision plate as a rotational force, a fulcrum shaft that rotatably supports the rotating member, and outside the grain flow path And a sensor for detecting the rotational force of the rotating member. If it does in this way, even if a grain collides, since the angle of a collision board hardly changes, the fall of the detection accuracy by the collision angle change of a grain can be avoided. In addition, since a strong spring that applies a rotational load to the collision plate is not required, good detection accuracy can be obtained even at a low flow rate. In addition, instead of directly detecting the collision force, the collision force is converted into turning force by the rotating member, and this turning force is detected by the sensor, so even without using an expensive load measuring sensor such as a large load cell, The grain flow rate detection device can be configured using a small and inexpensive load measuring sensor such as a pressure sensitive sensor. Moreover, since the sensor detects the rotational force of the rotating member outside the grain flow path, it is possible to avoid troubles of the sensor due to collision with the grain or dust in the grain flow path.
In the grain flow rate detection device of the present invention, the rotating member penetrates a partition wall that partitions the inside and outside of the grain channel, and the collision plate is located at one end of the rotating member located inside the grain channel. In addition, a sensor is disposed on the other end of the rotating member located outside the grain flow path to detect the rotational force of the rotating member. If it does in this way, the grain flow rate detection apparatus of this invention can be comprised simply with few parts.
Further, in the grain flow rate detection device of the present invention, the fulcrum shaft penetrates a partition wall that partitions the inside and outside of the grain flow path, and the collision plate is integrated at one end of the fulcrum shaft positioned inside the grain flow path. On the other hand, the other end of the fulcrum shaft located outside the grain channel supports the one end of the rotating member integrally, and a sensor is disposed on the other end of the rotating member. The turning force of the moving member is detected. If it does in this way, not only can the grain flow rate detection device of the present invention be simply configured with few parts, but also it is possible to suppress the projecting dimension of the grain flow rate detection device along the rotating member along the partition wall. it can. In addition, since the rotational force acting on the sensor can be adjusted by setting the length of the rotating member, the sensor can be shared even in applications where the detection ranges are different.

[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, the rotating member 102 to which the collision force acting on the collision plate 101 is transmitted as rotational force, and the rotating member 102 are rotatably supported. The fulcrum shaft 103 and the pressure sensor 104 that detects the rotational force of the rotating member 102 outside the grain flow path are provided.

  More specifically, the top plate 28 (partition wall) of the second reduction cylinder 19 is provided with an attachment hole (not shown) for the grain flow rate detection device 100, and the grain is closed so as to close the attachment hole. The attachment plate 105 of the particle flow rate detection device 100 is attached. The mounting plate 105 of the present embodiment is attached to the top plate 28 with mounting bolts 106 penetrating the long holes 105a. When the mounting bolts 106 are loosened, the position of the mounting plate 105 along the long holes 105a is changed. It is possible to adjust the mounting angle of the particle flow rate detection device 100.

  The mounting plate 105 is formed with a through hole 105b through which the rotation member 102 can pass, and a plurality of support plates 108 are erected in a rectangular tube shape from the periphery. The rotating member 102 is inserted into the support plate 108 standing upright in a rectangular tube shape, and the rotating member 102 is rotated by a fulcrum shaft 103 penetrating the support plate 108 and the rotating member 102 from the side. It is supported movably. The fulcrum shaft 103 of this embodiment is attached to the support plate 108 via a fulcrum shaft base 109 and a fulcrum shaft base mounting bolt 110, and the position adjustment of the fulcrum shaft 103 is easy.

  The collision plate 101 is integrally provided at one end of the rotating member 102 located inside the grain channel. 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 pressure-sensitive sensor 104 is disposed so as to abut on the other end of the rotating member 102 located outside the grain channel. The pressure-sensitive sensor 104 of the present embodiment is attached to the support plate 108 via the sensor base 111 and the sensor base mounting bolt 112, so that the position and replacement of the pressure-sensitive sensor 104 are easy. The contact surface of the rotating member 102 with the pressure sensor 104 is the same surface as the mounting surface of the collision plate 101. Further, an adjustment bolt 113 is in contact with the opposite surface, and a fine rotation range adjustment (backlash adjustment) of the rotation member 102 can be performed by the forward / backward operation.

  Furthermore, in this embodiment, in order to avoid a decrease in detection accuracy due to machine vibration (particularly vertical vibration), the arrangement of the grain flow rate detection device 100 and the material of the members constituting the grain flow rate detection device 100 are also devised. is doing. For example, the rotation member 102 is arranged in the vertical direction, and the detection direction of the pressure-sensitive sensor 104 is set to the horizontal direction so that the vertical vibration of the airframe is not detected. Moreover, the impact plate 101 is made of resin, and the turning member 102 is made of aluminum, so that the turning portion of the grain flow rate detection device 100 is lightened, the influence of the machine vibration is reduced, and the detection sensitivity even at a low flow rate. To keep it.

  When the grain collides with the collision plate 101 of the grain flow rate detection device 100 configured as described, the collision force is converted into the rotational force of the rotating member 102. Since the other end of the rotating member 102 is in contact with the pressure-sensitive sensor 104, the rotational force is detected by the pressure-sensitive sensor 104 with almost no rotation. According to such a grain flow rate detection device 100, since the angle of the collision plate 101 hardly changes, it is possible to avoid a decrease in detection accuracy due to a change in the collision angle of the grain and perform extremely accurate flow rate detection. become. In addition, since a spring for urging the collision plate 101 to the initial position is not necessary, good detection accuracy can be obtained even at a low flow rate.

  In addition, the collision force is not directly detected, but the collision force is converted into the rotational force by the rotating member 102, and this rotational force is detected. Therefore, even if an expensive load measuring sensor such as a load cell is not used, the pressure sensitivity An inexpensive load measurement sensor such as the sensor 104 can be used. In addition, since the pressure sensor 104 detects the rotational force of the rotating member 102 outside the grain flow path, troubles caused by collision with the grain or dust in the grain flow path can be avoided.

[Second Embodiment]
Next, the grain flow rate detection apparatus 200 according to the second embodiment of the present invention will be described with reference to FIG. As shown in FIG. 6, the grain flow rate detection device 200 according to the second embodiment transmits a collision plate 201 that collides with a grain inside a grain flow path, and a collision force that acts on the collision plate 201 as rotational power. And a fulcrum shaft 203 that rotatably supports the rotating member 202, and a pressure-sensitive sensor 204 that detects the rotational force of the rotating member 202 outside the grain flow path. However, the fulcrum shaft 203 penetrates the partition wall (top plate 28) that partitions the inside and outside of the grain flow path, and is located inside the grain flow path. The collision plate 201 is integrally supported at one end of the rotation member, while the other end of the fulcrum shaft 203 located outside the grain flow path is integrally supported at one end of the rotation member 202, and the rotation member The first point is that the pressure sensor 204 is disposed at the other end of the 202 to detect the rotational force of the rotating member 202. It is different from the facilities form. In FIG. 6, reference numeral 205 denotes a mounting plate attached to the partition wall, 206 denotes a bearing that rotatably supports the fulcrum shaft 203, and 207 denotes a backlash that defines a minute rotation range of the rotation member 202. It is a stopper.

  If it does in this way, not only can the grain flow rate detection device of the present invention be simply configured with few parts, but the protruding member of the grain flow rate detection device 200 is suppressed along the rotating member 202 along the partition wall. be able to. In addition, since the rotational force acting on the pressure-sensitive sensor 204 can be adjusted by setting the length of the rotating member 202, the pressure-sensitive sensor 204 can be shared even in applications where the detection ranges are different.

  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. Further, the sensor for detecting the rotational force of the rotating member is not limited to the pressure sensor, and various load measuring sensors (including a load sensor) can be used. Moreover, in the said embodiment, although the adjustment bolt 113 and the stopper 207 are used for the backlash removal of the rotation members 102 and 202 (impact plate 101,201), you may make it perform backlash removal with a spring. . In this case, as a spring for removing looseness, a spring having an extremely weak force can be used as compared with the rotational load spring used in the grain flow detection device of the displacement detection method, so there is almost no influence on the flow detection. Good detection accuracy can be maintained even at a low flow rate.

[Reference example]
Next, the grain flow rate detection apparatus 300 according to the reference example will be described with reference to FIG. As shown in FIG. 7, the grain flow rate detection device 300 according to the reference example includes a collision plate 301 that collides with the grain inside the grain channel, and a flexure member that supports the collision plate 301 within the grain channel. 302, a rubber plate 303 stretched in a hole communicating with the inside and outside of the grain channel, and a pressure sensitive sensor 304 disposed outside the grain channel.

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

Also in the grain flow rate detection device 300 of the reference example configured as described above, it is possible to detect the collision force of the collision plate 301 by the pressure-sensitive sensor 304 arranged outside the grain channel.
However, in the grain flow rate detection device 300 of the 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. Similar to the grain flow rate detection device, there is a problem in detection accuracy at a low flow rate.
Further, since the pressure-sensitive sensor 304 detects a collision force via the rubber plate 303, there is a problem that detection accuracy decreases 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 line view of the 2nd reduction | restoration cylinder provided with the grain flow volume detection apparatus which concerns on 1st 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 side view of the grain flow rate detection apparatus which concerns on 1st embodiment. (A) is a top view of the grain flow rate detection apparatus which concerns on 2nd embodiment, (B) is a side view. (A) is a top view of the grain flow rate detection apparatus which concerns on a reference example, (B) is a side view.

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 104 Pressure sensor 200 Grain flow rate detection device 201 Collision plate 202 Rotating member 203 Support shaft 204 Pressure-sensitive sensor

Claims (3)

A grain flow rate detection device for detecting a grain flow rate,
A collision plate that collides with the grain inside the grain channel;
A rotating member to which a collision force acting on the collision plate is transmitted as a rotational force;
A fulcrum shaft that rotatably supports the rotating member;
A grain flow rate detection device comprising: a sensor that detects the rotational force of the rotating member outside the grain flow path.   The rotating member penetrates a partition wall that partitions the inside and outside of the grain flow path, and integrally supports the collision plate at one end of the rotating member that is located inside the grain flow path. The grain flow rate detection device according to claim 1, wherein a sensor is disposed at the other end of the rotating member located outside the sway to detect the rotational force of the rotating member.   The fulcrum shaft penetrates a partition wall that partitions the inside and outside of the grain flow path, and integrally supports the collision plate at one end of the fulcrum shaft located inside the grain flow path, while the outside of the grain flow path One end portion of the rotating member is integrally supported by the other end portion of the fulcrum shaft located at the position, and a sensor is disposed on the other end portion of the rotating member to detect the rotational force of the rotating member. The grain flow rate detection device according to claim 1.

Images