JP3615450B2 - Thresher - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention belongs to the technical field of a threshing machine mounted on a combine or the like.
[0002]
[Prior art]
In general, in this seed threshing machine, the sorted matter that has been threshed in the handling room is sieve-sorted by the swing sorting unit, and the sorted product leaked from the swing sorting unit is wind-sorted by a blower fan. When the processing capacity of the swing sorting unit (for example, the opening of the chaff sheave) is constant, not only the sorting accuracy will vary with the increase / decrease of the items to be sorted, but also the discharged particles outside the machine will increase due to overflow. There was a possibility.
[0003]
[Problems to be solved by the invention]
Therefore, depending on the layer thickness of the object to be sorted stacked on the rocking sorting unit, the processing capability of the rocking sorting unit is automatically controlled, and according to the air volume (wind pressure) of the sorting air passing through the rocking sorting unit. A device that automatically controls the processing capability of the swing sorting unit has been proposed. However, in the former, it is difficult to detect an accurate layer thickness because the layer thickness is detected on the swing sorting unit that constantly swings, whereas in the latter, the processing status of the swing sorting unit ( The detection error caused by the swinging of the swing sorting unit can be largely avoided, but the sorting wind passing through the swing sorting unit is capable of processing the swing sorting unit. Since the wind direction and the wind speed are affected by the adjustment operation, the detection value may vary.
[0004]
[Means for Solving the Problems]
The present invention was created for the purpose of solving these problems in view of the above circumstances, and includes a handling room for threshing stems and a sieve for screening the threshed material to be screened. A sorting unit, a blower fan that wind-sorts the sorting object leaked from the swing sorting unit, a dust exhaust fan that discharges impurities contained in the sorting object, and a fourth that drains the threshed stem culm In a threshing machine having a mouth, when providing a sorting control unit that automatically controls the processing capacity of the swing sorting unit, an air volume sensor that detects an air volume flowing in from the fourth port is provided, and the air volume sensor detects Based on the value, the processing capacity of the rocking sorting unit is automatically controlled, and the processing capacity of the rocking sorting unit is increased according to the increase in the air volume flowing in from the fourth port, while the processing capacity is reduced according to the decrease in the air volume. characterized in that to reduce the capacity of the swing sorting section Te A threshing machine to be. In other words, without directly detecting the air volume of the sorting air that changes according to the processing status of the rocking sorting section, the inflow air volume that changes according to the air volume of the sorting air (from the 4th air outlet by the dust exhaust fan) The processing capacity of the rocking sorter is automatically controlled based on the air volume detection, while the processing capacity of the rocking sorter is automatically controlled based on the air volume detection. Air volume detection that is not affected by the adjustment operation can be performed, and as a result, processing capacity control adapted to the processing status of the swing selection unit can be performed.
In addition, in a situation where the amount of objects to be sorted on the swing sorting unit is large, the swing sorting unit responds to the increase in the incoming air from the fourth port as the sorting wind passing through the swing sorting unit decreases. In the situation where the amount of objects to be sorted on the swing sorting unit is small, the inflow air from the fourth port decreases as the sorting wind passing through the swing sorting unit increases. Accordingly, since the processing capability of the swing sorting unit is reduced, it is possible to control the processing capability suitable for the processing status of the swing sorting unit.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Next, one embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a threshing machine mounted on a combine. The threshing machine 1 includes a threshing feed chain 3 for holding and conveying a stem along a handling chamber 2, and an object to be sorted (including a mixture). A processing cylinder 4 for threshing the grain), a receiving net 5 for leaking the threshed sorting object, and a single grain processing for the sorting object that has reached the end of the handling room without leaking from the receiving net 5 A cylinder 6; a second receiving net 7 that leaks the object to be sorted that has been made into a single grain by the processing cylinder 6; an oscillating flow plate 8 that sequentially swings and conveys the object to be sorted that has leaked from the receiving net 5; A sieve sorting unit 9 that screens the objects to be sorted at the end of the flow plate 8, and a tang fan (blower fan) 10 that carefully sorts the objects that have leaked from the sieve sorting unit 9 in the first sorting style. The first helix 11 for horizontally conveying the cereal grain, and the cereal for lifting and conveying the grain conveyed to the end of the first helix 11 to a grain tank (not shown) 12, the slat rack 13 for sieving the sorting object that has not leaked from the sieve sorting unit 9 or the sorting object leaked from the second receiving net 7, and the sorting object leaked from the strolac 13 or the like A second sorting fan 14 that performs wind sorting with the second sorting wind, a second spiral 15 that horizontally transports the second wind-sorted object, and an object to be sorted that has been transported to the end of the second spiral 15 are placed in the sorting path. A second reduction cylinder 16 for reduction, a dust exhaust fan (third port) 17 that discharges swarf and the like to the outside at the end position of the straw rack 13, and a threshing-treated waste after passing through the fourth port 18 The oscillating flow plate 8, the sieve sorting unit 9 and the strok rack 13 are composed of an oscillating sorter (oscillating sorter) which is an integral oscillating assembly. Part) A and with a predetermined period using a crank mechanism and a cam mechanism It adapted to be brought into connection to reciprocally swing.
[0006]
The sieve sorting section 9 is configured by providing a chaff sheave 20 as a first sieve sorter and a grain sheave 21 as a second sieve sorter in two upper and lower stages, and the upper chaff sheave 20 is arranged in the front-rear direction. While the plurality of fins 20a arranged in parallel with each other at a predetermined interval, the lower grain sheave 21 is formed of a wire mesh member having a predetermined mesh, but the chaff sheave 20 is formed of the fins 20a. The fin opening degree (selection processing capability) can be adjusted based on the angle change.
[0007]
Reference numeral 22 denotes a dust exhaust chamber in which the dust exhaust fan 17 is provided. The dust exhaust chamber 22 is supplied with sorting air from the tang fan 10 and inflow air from the fourth port 18. However, the air volume of the sorting air flowing into the dust exhaust chamber 22 increases or decreases in accordance with the amount of objects to be sorted on the chaff sheave 20 through which the sorting air passes. Therefore, the amount of air flowing from the fourth port 18 increases and decreases in a contradictory manner according to the amount of the selected air flowing into the dust chamber 22.
[0008]
Reference numeral 23 denotes a top plate that covers the upper side of the dust chamber 22, and the top plate 23 is formed in an arc shape in a side view so as to guide the wind flowing into the dust chamber 22 to the dust fan 17. In the vicinity of the top plate 23, there is little interference of the sorting air flowing from the Kara fan 10 through the chaff sheave 20, and the inflowing air from the fourth port 18 mainly passes therethrough.
[0009]
Reference numeral 24 denotes an air volume sensor provided on the outer surface of the top plate 23. The air inlet 24a of the air volume sensor 24 communicates with the outside through the intake pipe 25, while the outlet 24b passes through the outlet nozzle 26. Therefore, the air flow sensor 24 has an air pressure outside the machine (atmospheric pressure) and an air pressure in the dust chamber 22 (fourth air flow). An air flow corresponding to a differential pressure with respect to a negative pressure generated according to the amount of air flowing into the mouth is generated, and this is detected and input to the selection control unit 27 described later. That is, the air flow of the sorting air on the chaff sheave 20 is not directly detected, but the air flow on the chaff sheave 20 is changed based on the air flow from the fourth port 18 that changes according to the air flow of the sorting air. Since the amount of sorting (processing status) is indirectly detected, the amount of sorting on the chaff sheave 20 can be detected without being significantly affected by changes in the wind direction and wind speed associated with adjustment of the opening of the chaff sheave 20. Since the blowout nozzle 26 of the air volume sensor 24 is provided mainly near the top plate of the dust chamber 22 through which the inflow air from the fourth port 18 passes, it is caused by interference of the sorting air (including soot dust). In addition to allowing the detection error to be prevented as much as possible, the inconvenience of disturbing the flow of the sorting wind can be avoided.
[0010]
Incidentally, the air temperature sensor 24 has an ambient temperature sensor for detecting an ambient temperature in a detection air path from the inlet 24a to the outlet 24b, and a heating temperature controlled to be higher by a predetermined temperature than the ambient temperature. A structure without a mechanical operating part is provided with a heater, a windward temperature sensor disposed on the leeward side of the heater, and a detection chip incorporating a leeward temperature sensor disposed on the leeward side of the heater. The air volume is detected based on the temperature difference between the upper detection temperature and the leeward detection temperature. That is, when there is no flow in the detection air path, the temperature distribution around the heater becomes uniform, so the temperature difference becomes “0”, while when there is a flow in the detection air path, the temperature around the heater Since the distribution is biased toward the leeward side according to the air volume, the air volume can be detected based on the temperature difference.
[0011]
The sorting control unit 27 is configured by using a microcomputer (including a CPU, a ROM, a RAM, and the like), and its input unit includes a fin opening degree for detecting the opening degree of the air volume sensor 24 and the chaff sheave 20 described above. Sensor 28, sorting setting dial 29 for setting the type of sorting material, sorting automatic switch 30 for turning on / off sorting automatic control to be described later, working machine clutch sensor 31 for detecting on / off of the working machine clutch (threshing clutch), etc. Are connected via a predetermined input interface circuit, and a fin opening motor 32 or the like for forcibly changing the opening degree of the chaff sheave 20 is connected to the output unit via a predetermined output interface circuit. That is, the sorting control unit 27 includes a control program such as sorting automatic control that automatically controls the opening degree of the chaff sheave 20 in accordance with an input signal from the air volume sensor 24 or the like. Is described based on a flowchart. However, in the automatic sorting control, the stepped fin opening is referred to as a rank when the fin opening is controlled step by step. Further, in the sorting automatic control, only rank setting is performed, and drive control of the fin opening motor 32 is performed in a separate routine.
[0012]
In the automatic sorting control, first, it is determined whether the automatic sorting switch 30 is ON / OFF. If the determination is NO, the manual selection control defined as a subroutine is executed. When the on / off state of the machine clutch is determined, and when it is determined that the clutch is disengaged, the main routine is immediately resumed. On the other hand, when it is determined that the clutch is engaged, it is suitable for the sorting material based on the set value of the sorting setting dial 29 The maximum rank (upper limit of the opening control range) and the minimum rank (lower limit of the opening control range) are set in the upper rank variable and the lower rank variable. Then, after setting the rank variable, it is determined whether or not the current airflow sensor value is appropriate. If it is determined that the airflow sensor value is appropriate, the current rank counter variable value is If the air volume sensor value is smaller than the dead zone lower limit value α1, the rank counter variable value is rank-down processed (rank counter ← rank counter-1) while confirming that the lower rank is not exceeded. If the sensor value is larger than the dead band upper limit α2 (α2> α1), the rank counter variable value is ranked up (rank counter ← rank counter + 1) while confirming that the upper rank is not exceeded. Yes. In other words, in a situation where the amount of objects to be sorted on the chaff sheave 20 is large, the amount of the objects to be sorted on the chaff sheave 20 is small while the fin opening of the chaff sheave 20 is increased in response to an increase in the inflow air from the fourth port 18. Then, the fin opening degree of the chaff sheave 20 is reduced in accordance with the reduction of the inflow air from the fourth port 18.
[0013]
In what is configured as described, the handling chamber 2 for threshing the stalks, the rocking sorter A for sieving the threshed material to be screened, and the chaff sheave 20 of the rocking sorter A leaked. Although it is provided with the Kara fan 10 for wind-sorting the material to be sorted, the dust exhaust fan 17 for discharging the impurities contained in the material to be sorted, and the fourth port 18 for discharging the threshed stalks, In providing the selection control unit 27 that automatically controls the fin opening of the chaff sheave 20, an air volume sensor 24 that detects the air volume flowing in from the fourth port 18 is provided, and based on the detected value of the air volume sensor 24, The fin opening is automatically controlled. That is, without directly detecting the air volume of the sorting air that changes in accordance with the amount of the object to be sorted on the chaff sheave 20, the air flow on the chaff sheave 20 is changed based on the inflow air from the fourth port 18 that changes in accordance with the air volume of the sorting air. Indirect detection of the amount of the selected material can automatically detect the fin opening of the chaff sheave 20 based on the detection of the air volume, and can detect the air volume without being affected by the fin opening adjustment operation of the chaff sheave 20. As a result, fin opening control suitable for the amount of objects to be sorted becomes possible.
[0014]
Further, in the situation where the amount of objects to be sorted on the chaff sheave 20 is large, the fins of the chaff sheave 20 are increased in accordance with the increase of the inflow air from the fourth port 18 as the sorting wind passing through the rocking sorter A decreases. In a situation where the opening degree is increased while the amount of the object to be sorted is small, the fins are opened in accordance with the decrease of the inflow air from the fourth port 18 as the sorting air passing through the rocking sorter A increases. Since the degree is reduced, fin opening control suitable for the amount of objects to be sorted becomes possible.
[0015]
Further, the air volume sensor 24 is arranged near the top plate 23 of the dust exhaust chamber 22 where the dust exhaust fan 17 is provided. Since it is a position that is mainly passed and is not easily affected by the sorting wind that has passed through the rocking sorter A, the amount of air flowing in from the fourth port 18 can be detected with high accuracy.
[0016]
Needless to say, the present invention is not limited to the above-described embodiment. For example, in the above-described embodiment, a chaff sheave with adjustable fin opening is used as the processing capacity adjusting means of the swing sorting unit. It goes without saying that the present invention can also be implemented by a threshing machine using the processing capacity adjusting means.
[Brief description of the drawings]
FIG. 1 is a schematic side view of a threshing machine.
FIG. 2 is a block diagram showing input / output of a selection control unit.
FIG. 3 is a flowchart showing sorting automatic control.
FIG. 4 is an operation explanatory view of automatic sorting control.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Thresher 2 Handling room 8 Oscillating flow board 9 Sieve sorting part 10 Kara fan 17 Dust exhaust fan 18 No. 20 Chaff sheave 22 Dust chamber 23 Top plate 24 Airflow sensor 27 Sorting control part A Swing sorter

Claims (1)

A handling room for threshing the stems, an oscillating sorting unit for screening the threshed material to be screened, a blower fan for wind-selecting the material leaked from the oscillating sorting unit, and In a threshing machine comprising a dust exhaust fan that discharges contained impurities and a number 4 outlet that discharges threshed stems and stems, a sorting control unit that automatically controls the processing capacity of the swing sorting unit is provided. An air volume sensor for detecting the air volume flowing in from the 4th port is provided, and the processing capacity of the swing sorting unit is automatically controlled based on the detection value of the air volume sensor, and the air volume flowing in from the 4th port is controlled . A threshing machine characterized in that the processing capacity of the rocking sorting unit is increased in accordance with the increase, while the processing capacity of the rocking sorting unit is reduced in accordance with the decrease in the air volume .

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