JP3682209B2 - Sorting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention belongs to the technical field of a sorting apparatus having a sorting automatic control function for automatically controlling the processing capability of a swing sorting unit.
[0002]
[Prior art]
In general, some sorters provided in a combiner or the like are provided with a rocking sorting unit that sifts through the objects to be sorted sequentially, but the processing ability (chaff sheave opening degree, etc.) of the rocking sorting unit is constant. In this case, the sorting accuracy may not be allowed to vary with the increase / decrease of the objects to be sorted, and so-called overflow may occur and the objects to be sorted may be scattered from the dust outlet to the outside of the machine. Therefore, recently, a processing status detection means for detecting the processing status of the swing sorting section (amount of objects to be sorted, the amount of sorting air, etc.) is provided, and the swing selection is performed so that the detection value of the detection means keeps a predetermined reference value range. It has been proposed to automatically control the processing capacity of the department.
[0003]
[Problems to be solved by the invention]
By the way, the proper processing capacity of the rocking / sorting unit changes depending on processing conditions other than the amount of material to be sorted (type of material to be sorted, moisture content, etc.). It has been proposed to provide control range setting means for setting based on this. However, at the start of automatic control, the processing capacity may be out of the set control range. In this situation, the return to the set control range may be delayed and overflow may occur, or the sorting accuracy may be reduced. There was sex.
[0004]
[Means for Solving the Problems]
The present invention has been created in view of the above circumstances and has been created for the purpose of solving these problems. The invention of claim 1 is a rocking and sorting unit that sifts and sorts objects to be sequentially supplied. And a processing status detection means for detecting the processing status of the swing sorting section, and the processing capability of the swing sorting section is automatically controlled so that the detection value of the processing status detection means maintains a predetermined reference value range. In the sorting apparatus including the sorting automatic control means and the control range setting means for setting the processing capability control range of the swing sorting unit, the sorting automatic control means includes the setting process in which the processing capability at the start of the automatic control is set. The sorting apparatus is characterized in that, when out of the capability control range, the processing capability is changed toward the set processing capability control range earlier than usual. That is, when the processing capacity of the automatic control is started is out of the set capacity control range, or overflow delayed return to the set capacity control range is generated, the possibility of sorting accuracy is lowered Can be reduced.
The invention of claim 2 is characterized in that, in claim 1, the processing capability is changed earlier than usual only when the processing capability at the start of automatic control is out of the capability setting range with respect to the set processing capability control range. This is a sorting device. That is, when the set processing capacity control range is out of excess capacity, the processing capacity is changed at the normal speed, so that it is possible to prevent an overflow from occurring due to a rapid decrease in processing capacity.
[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 (processing state detecting means) 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 The air flow sensor 24 communicates with the vicinity of the top plate (the fourth inlet inflow air passage) of the dust removal chamber 22 through the blowout nozzle 26. Therefore, the air pressure sensor 24 has a pressure outside the machine (atmospheric pressure) and a dust removal chamber. An air flow corresponding to a differential pressure with respect to 22 atmospheric pressures (a negative pressure generated according to the No. 4 inlet air volume) is generated, and is detected and input to a 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 the ambient temperature in a detection air path from the inlet 24a to the outlet 24b, and a heating temperature controlled to be higher than the ambient temperature by a predetermined 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 lee 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 on the input side thereof, a fin opening that detects the fin opening degree of the air volume sensor 24 and the chaff sheave 20 described above. Degree sensor 28, sorting setting dial 29 (control range setting means) for setting the opening control range of chaff sheave 20 in stages, sorting automatic switch 30 for turning on / off sorting automatic control to be described later, work implement clutch (threshing clutch) A work machine clutch sensor 31 for detecting on / off of the vehicle, a vehicle speed sensor 32 for detecting the vehicle speed of the combine, and the like are connected via a predetermined input interface circuit, while the fin opening of the chaff sheave 20 is forced on the output side. A fin opening motor 33 or the like to be changed is connected via a predetermined output interface circuit. In other words, the sorting control unit 27 includes a control program such as “sorting automatic control” that automatically controls the fin opening of the chaff sheave 20 in accordance with an input signal from the air volume sensor 24 or the like. The control procedure of “control” will be described based on a flowchart. However, in the “selection automatic control”, the fin opening degree of the chaff sheave 20 is rank-set in advance and a plurality (for example, eight) fin opening control ranges including a predetermined opening rank number (for example, seven ranks). Are set in stages, and the control range rank is selected by the selection setting dial 29.
[0012]
Now, in the “automatic sorting control”, it is determined whether or not the automatic sorting execution conditions (selection automatic switch ON, work implement clutch engagement, etc.) are satisfied. If the determination is YES, the fin determination flag is set. Determine ON-OFF. If the fin determined flag is OFF, it is determined to which fin opening rank the current fin position corresponds, and the fin opening flag is set as the initial rank, and the fin determined flag is ON. Set. Next, the current airflow sensor value is compared with the rank-up reference value and the rank-down reference value, where the airflow sensor value is within the reference value range (smaller than the rank-up reference value and larger than the rank-down reference value). ), The current fin rank is maintained, but if the air flow sensor value is below the rank-down reference value and this state continues for a predetermined time T or more, the fin rank is lowered. On the other hand, if the air flow sensor value is equal to or higher than the rank-up reference value and this state continues for a predetermined time T or more, the fin rank is increased, and then the fin opening that targets the fin rank in the subroutine is performed. The degree is controlled. In other words, in a situation where the amount of objects to be sorted on the chaff sheave 20 is small, the amount of the objects to be sorted on the chaff sheave 20 is large while the fin opening of the chaff sheave 20 is reduced in accordance with the reduction of the inflow air from the fourth port 18. Then, the fin opening of the chaff sheave 20 is increased in accordance with the increase of the inflow air from the fourth port 18, but the fin opening at the start of automatic control is from the set opening control range set by the selection setting dial 29. off even if the current fin opening as an initial rank, in order to rank up or downgrading depending on the air flow sensor values, the ratio to that put forced into the set opening control range, ignoring the airflow sensor value Thus, the suitability of the fin opening with respect to the processing situation can be enhanced.
[0013]
In the “selective automatic control” of the present embodiment, when the airflow sensor value is equal to or higher than the rank-up reference value in the airflow sensor value comparison determination, the current fin opening and the set opening set by the selection setting dial 29 are set. When it is determined that the fin opening is within the set opening control range or out of the range, the determination time T (control cycle) is set as described above. The rank-up process is executed after waiting for elapse of time, but if it is determined that the current fin opening is outside the set opening control range, the determination time is shorter than the determination time T (for example, T / 2) is used to execute rank-up processing. That is, when the fin opening at the start of automatic control is out of the set opening control range set by the selection setting dial 29, the fin opening is changed toward the set opening control range earlier than usual. because you, or overflow occur delayed return to set opening control range, sorting accuracy can be reduced or possibly reduced, moreover, in the present embodiment, the fin opening is set opening Since the fin opening is changed earlier than usual only when the control range is outside the closed side, it is possible to prevent an overflow from occurring due to a sudden change in the fin opening toward the closed side. Yes.
[0014]
In the configuration as described above, a chaff sheave 20 that sifts through objects to be sequentially supplied, an air volume sensor 24 that detects a processing state of the chaff sheave 20, and a detection value of the air volume sensor 24 is a predetermined reference value. “Automatic selection control” for automatically controlling the fin opening of the chaff sheave 20 so as to maintain the range, and a selection setting dial 29 for setting the fin opening control range of the chaff sheave 20 are provided, but automatic control starts. If out of the set opening control range fin opening is set when, for you to change the fin opening toward earlier set opening control range than usual, return to the set opening control range This can reduce the possibility that an overflow will occur and the sorting accuracy will decrease.
[0015]
In addition, since the fin opening is changed earlier than usual only when the fin opening at the start of automatic control is outside the set opening control range, the fin opening is rapidly changed to the closing side. It is also possible to prevent an overflow from occurring due to a change in the fin opening.
[0016]
Needless to say, the present invention is not limited to the above-described embodiment. For example, the processing status detection means is not limited to the air volume sensor of the above-described embodiment, and the layer of non-sorted objects in the swinging sorter is of course. It is also possible to employ processing status detection means such as a layer thickness sensor for detecting the thickness.
[Brief description of the drawings]
FIG. 1 is a schematic side view of a threshing machine.
FIG. 2 is an explanatory diagram of the operation of the air volume sensor.
FIG. 3 is a block diagram illustrating input / output of a selection control unit.
FIG. 4 is a flowchart showing “selection automatic control”;
FIG. 5 is an explanatory diagram showing a fin opening rank and an opening control range.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Thresher 2 Handling room 8 Oscillating flow plate 9 Sieve sorting part 10 Kara fan 17 Dust exhaust fan 18 No. 20 Chaff sheave 24 Air flow sensor 27 Sorting control part A Oscillating sorter

Claims (2)

An oscillation sorting unit that sifts the objects to be sorted sequentially, a processing status detection unit that detects a processing status of the oscillation sorting unit, and a detection value of the processing status detection unit maintains a predetermined reference value range. The sorting automatic control means for automatically controlling the processing capability of the swing sorting section and the control range setting means for setting the processing capability control range of the swing sorting section as described above, wherein the sorting automatic control means is If the processing capacity of the automatic control is started is deviated from the set setting processing capacity control range, usually sorting device and changes the capacity towards early setting processing capacity control range than. 2. The sorting apparatus according to claim 1, wherein the processing capacity is changed earlier than usual only when the processing capacity at the start of automatic control deviates from the set processing capacity control range to the capacity shortage side.

Images