JP3582985B2 - Sorting device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention belongs to the technical field of a sorting device provided in a combine, a harvester, or the like.
[0002]
[Prior art]
In general, a sorting device provided in this type of combine etc. filters and sorts the sorting material supplied from the handling chamber with a chaff sieve provided at the end of the oscillating flow plate, and further sorts the sorting material leaking from the chaff sheave. The selected material is carefully selected by the fan's sorting wind, and the selected material is stored in a storage tank.If the fin opening of the chaff sieve is constant, the sorting There is a possibility that so-called overflow may occur and material loss may increase without being allowed to cause variation.
[0003]
[Problems to be solved by the invention]
Therefore, a fin opening adjustment mechanism that adjusts the fin opening of the chaff sheave based on the drive of the actuator, a fin opening detection sensor that detects the fin opening of the chaff sheave, and a sorting automatic control that automatically controls the fin opening adjustment mechanism It has been proposed to provide a sorting unit and perform sorting in accordance with the type and supply amount of the sorting material. However, in such a case, if the fin opening detection sensor fails (mechanically or electrically), the fin opening adjustment mechanism cannot be controlled, and the chaff sheave maintains the fin closed state and the material loss occurs. Could be increased.
[0004]
[Means for Solving the Problems]
SUMMARY OF THE INVENTION The present invention has been made to solve these problems in view of the above situation, and the invention of claim 1 is a fin that adjusts a fin opening of a chaff sheave based on driving of an actuator. In a selection device including an opening adjustment mechanism, a fin opening detection sensor that detects a fin opening of the chaff sheave, and a selection automatic control unit that automatically controls the fin opening adjustment mechanism, the separation automatic control unit includes: and sensor abnormality determining means for determining abnormality of the degree detecting sensor, when it is determined that the abnormality of the fin opening detection sensor, together with the actuator to provide an abnormality when the fin opening drive means for driving a predetermined time in the fin-opening direction, wherein the sensor abnormality determining means, when the actuator drive output in the same direction continues for a predetermined time, to judge the abnormality of the fin opening detection sensor A sorting device according to symptoms. In other words, when an abnormality occurs in the fin opening detection sensor, the actuator of the fin opening adjustment mechanism is driven in the fin opening direction for a predetermined time, so that the chaff sheave does not maintain a closed state. It is possible to prevent an increase in material loss due to the abnormality of the degree detection sensor. Further, since the abnormality of the fin opening detection sensor is determined based on the driving duration of the actuator, the abnormality determination routine can be simplified.
According to a second aspect of the present invention, a fin opening adjustment mechanism for adjusting a fin opening of a chaff sheave based on driving of an actuator, a fin opening detection sensor for detecting a fin opening of a chaff sheave, and a fin opening adjustment mechanism are automatically provided. A sorting automatic control unit for controlling the sorting, the sorting automatic control unit includes a sensor abnormality determining unit for determining an abnormality of the fin opening detection sensor; and Fin opening driving means for driving the actuator in the fin opening direction for a predetermined time, and the abnormal fin opening driving means moves the actuator in the fin opening direction only when the sensor abnormality determining means determines an abnormality during the fin closing driving. Is driven for a predetermined time . In other words, when an abnormality occurs in the fin opening detection sensor, the actuator of the fin opening adjustment mechanism is driven in the fin opening direction for a predetermined time, so that the chaff sheave does not maintain a closed state. It is possible to prevent an increase in material loss due to the abnormality of the degree detection sensor. Further, the abnormal fin opening driving means is characterized in that the actuator is driven in the fin opening direction for a predetermined time only when the sensor abnormality judging means judges an abnormality during the fin closing driving. That is, useless driving of the actuator can be prevented, and overload of the actuator due to useless driving can be avoided.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, one embodiment of the present invention will be described with reference to the drawings. In the drawings, 1 is a combine, and the combine 1 is a pre-processing unit 2 for cutting stem culms, a threshing sorting unit 3 for threshing grains from the cut stalk culms, and sorting kernels, and a sorted grain. A grain tank 4 for storing grains, a post-processing unit 5 for discharging threshed culms, an operating unit 6 in which various operating tools are disposed, a traveling unit 7 including a pair of left and right crawler traveling devices 7a, and the like. , But each of these basic configurations is the same as the conventional one.
[0006]
Reference numeral 8 denotes a transmission provided in the traveling section 7. The transmission 8 receives the power of the engine 10 via a hydrostatic continuously variable transmission unit (HST) 9 functioning as a main transmission mechanism, and receives the power. Is transmitted to the right and left crawler traveling devices 7a via the auxiliary transmission mechanism 11 and the side clutch mechanism 12, and a transmission rotation sensor 14 for detecting rotation of the intermediate transmission shaft 13 is provided on one side of the transmission 8. I have.
[0007]
The pre-processing unit 2 includes a divider 15 for weeding the uncut stem, a raising device 16 for raising the weeded stem, a cutting blade (not shown) for cutting the root position of the stem, and cutting. The pretreatment transport device 18 and the like for nipping and transporting the stem and stem to a handling depth transport device 17 to be described later include a hydrostatic stepless transmission unit 9. Since the engine power is supplied via the stalk, the stalks are cut and transported at a speed linked to the vehicle speed.
[0008]
The handling depth transfer device 17 is vertically rotatable about the transfer end side as a fulcrum, and its rotation position can be adjusted based on forward / reverse drive of a handling depth motor (not shown). It has become. That is, since the handling depth transfer device 17 can raise and lower the pinching position based on the rotation when the stem is taken over at the transfer end portion of the pretreatment transfer device 18, the handling depth transfer device 17 is used. The handling depth of the threshing sorting unit 3 can be adjusted by changing the position of the threshing feed chain 19 that takes over the stem and culm at the terminal end of the device 17.
[0009]
Reference numeral 20 denotes a handling depth sensor provided in the handling depth transport device 17, and the handling depth sensor 20 includes a pair of contact-type detection switches for detecting the tip position of the transport stem. The handling depth transport device 17 is automatically controlled to an appropriate rotation position based on the detection switch signal (handling depth automatic control). A depth main sensor 21 is provided, and automatic control ON / OFF is switched based on the sensor signal.
[0010]
The threshing sorting unit 3 includes the threshing feed chain 19 for pinching and transporting the cut stems along the handling chamber 22, the handling cylinder 23 for threshing the processed material (grain including the mixture) from the transported stems, and threshing. Receiving net 24 that leaks the processed object, processing cylinder 25 that performs a single-graining process on the processing object that has reached the end of the handling chamber without leaking from the receiving net 24, and the processing cylinder 25 has a single grain. A second receiving net 26 that leaks the object to be processed, an oscillating flow plate 27 that sequentially oscillates and transports the object that has leaked from the receiving net 24, and the object to be processed at the end of the oscillating flow plate 27. A filtration and sorting unit 28 for performing filtration and sorting, a Karamin fan 29 for selecting the processed material leaked from the filtration and sorting unit 28 by the first sorting wind, a first spiral 30 for horizontally transporting the selected grains (sorting material), A frying cylinder 31 for hoisting and transporting the grains transported to the end of the first spiral 30 to the grain tank 4; 28. A stralac 32 for filtering and filtering the processed material that has not leaked from 28 and the processed material that has leaked from the second receiving net 26. A second sorting fan 33, a second spiral 34 that horizontally transports the second sorted wind, and a second reduction cylinder 35 that reduces the workpiece transported to the end of the second spiral 34 into the above sorting path. A suction fan 36 for discharging straw waste and the like outside the machine at the end position of the straw rack 32, a straw chain 37 for pinching and conveying threshing-treated waste to the rear of the machine, and a transfer stem of the straw chain 37. The oscillating flow plate 27, the filtering / sorting unit 28, the strok rack 32, and the like constitute an integral oscillating assembly A, and are constituted by a rotor (not shown) for dropping the sludge. Or driven by a cam mechanism It has become.
[0011]
The filtering and sorting unit 28 is configured by providing a chief sieve 38 as a first filtering and sorting body and a grain sieve 39 as a second filtering and sorting body in two upper and lower stages. While the lower grain sheave 39 is formed of a wire mesh member having a predetermined mesh, the lower grain sheave 39 is formed of a plurality of fins 40 arranged side by side at predetermined intervals. The protruding upper support pin 40a is pivotally supported by the side plate of the swing assembly A, while the lower support pin 40b is connected in a series via a movable plate (not shown). The opening of the chaff sheave 38 can be changed based on the synchronous swing of each fin 40 with the pin 40a as a fulcrum.
[0012]
Reference numeral 41 denotes a fin operating arm provided integrally with a predetermined upper support pin 40a. A roller 41a is provided at the end of the fin operating arm 41 so as to be rotatable. The plurality of fins 40 swing in conjunction with. On the other hand, reference numeral 42 denotes a guide plate which is provided on the outer surface of the swinging assembly A so as to be slidable back and forth, and an inclined guide portion 42a which contacts the roller 41a is formed above the guide plate 42. At the front of the guide plate 42, a rack portion 42b that meshes with a pinion gear 43a of a fin drive motor 43 (motor with a speed reduction mechanism) is formed. That is, the inclined guide portion 42a moves the roller 41a up and down in accordance with the front and rear sliding position of the guide plate 42, so that the fin drive motor 43 forcibly slides the guide plate 42 forward and backward based on the forward / reverse drive. The opening degree (fin interval) of the chaff sheave 38 can be adjusted. Incidentally, the fins 40 of the present embodiment are grouped into a front fin 40F, a middle fin 40M, and a rear fin 40R in accordance with the distance to the oscillating flow plate 27, and the fins 40 are linked in a unit of this group. Therefore, the opening adjustment range and the opening change pattern of each fin 40 can be set in group units.
[0013]
Reference numeral 44 denotes a fin opening detection sensor that detects the opening of the chaff sheave 38. The fin opening detection sensor 44 is integrated with a potentiometer 44b integrally attached to a sensor bracket 44a and an input shaft of the potentiometer 44b. It is provided with a detection plate 44c provided, an elastic machine (not shown) for urging the detection plate 44c backward, and the like. The detection plate 44c contacts the pin 42c projecting from the guide plate 42, and rotates the input shaft of the potentiometer 44b in accordance with the front and rear position of the pin 42c. Thus, the opening degree of the chaff sheave 38 that changes with the change can be detected. Reference numeral 42d denotes an elongated guide hole formed in the guide plate 42 in the front-rear direction, and reference numeral 45 denotes a stopper guide for guiding the guide hole 42d to be slidable back and forth and preventing the guide plate 42 from being pulled out. The position where the end of the guide hole 42d contacts the retaining guide member 45 is the mechanical operation limit position of the guide plate 42.
[0014]
Reference numeral 46 denotes a layer thickness detection sensor disposed above the chaff sheave 38. The layer thickness detection sensor 46 is a detection plate 46a which is pressed by an object to be processed on the chaff sheave 38 and swings rearward. It comprises a potentiometer 46b for detecting the swing angle of the plate 46a and the like, and detects the layer thickness of the workpiece on the chaff sheave 38 based on the output signal of the potentiometer 46b.
[0015]
Reference numeral 47 denotes a selection dial (selection material setting device) provided on the side of the driver's seat 48. The selection dial 47 is constituted by a rotary switch or a volume including an operation range of the first to seventh operation positions. Among them, the first to third operation positions are set in an area where automatic selection control for wheat is performed, while the fifth to seventh operation positions are set in an area where automatic selection control for rice is performed. Is set. In other words, the first operation position is “low wheat yield”, the second operation position is “normal wheat”, the third operation position is “high wheat yield”, and the fourth operation position is the material unset position (wheat setting area and rice setting). The fifth operation position is set to “low rice yield”, the sixth operation position is set to “rice standard”, and the seventh operation position is set to “high rice yield”.
[0016]
Reference numeral 49 denotes a selection control unit configured by using a microcomputer (including a CPU, a ROM, a RAM, and the like). On the input side of the selection control unit 49, the above-described mission rotation sensor 14, the handling depth main sensor 21, a fin opening detection sensor 44, a layer thickness detection sensor 46, a selection dial 47, a selection automatic switch 50 for turning ON / OFF a "selection automatic control" described later, and a mode changeover switch 51 for switching a control mode of "selection automatic control". Are connected via a predetermined input interface circuit, while the output side is connected to the above-mentioned fin drive motor 43 via a predetermined output interface circuit. That is, the sorting control unit 49 automatically controls the opening degree of the chaff sheave 38 based on the detection signal of the layer thickness detection sensor 46 and the setting signal of the sorting dial 47, a “separation automatic control (first control mode)”, and a mission. “Selection automatic control (second control mode)” that automatically controls the opening of the chaff sheave 38 based on the detection signal of the rotation sensor 14 and the setting signal of the selection dial 47, based on the abnormality determination of the fin opening detection sensor 44. A control program such as "auto-stop control" for automatically stopping the drive of the fin drive motor 43 is provided. Hereinafter, the contents of each control will be described with reference to flowcharts.
[0017]
In the “auto stop control”, it is determined whether or not the fin drive motor 43 is being driven based on the drive confirmation flag FINFG set in the “sorting automatic control”. Then, the drive confirmation flag FINFG is compared with the previous drive confirmation flag PFINFG (stored in this routine). If the two flags do not match, a delay timer (sensor value check timer) for a predetermined time is set. When it is determined that the timer has expired, the fin opening sensor data ADPOT is compared with the previous fin opening sensor data PAPPOT (stored in the timer interrupt routine). , The opening degree sensor abnormality flag is set to “1” and the driving of the fin driving motor 43 is stopped. Note that the delay timer time is set to be longer than the time (about 1.5 seconds) required from fin opening to fin closing or from fin closing to fin opening, and in this embodiment, it is set to about It is set to 2.5 seconds.
[0018]
In the “selection automatic control (first control mode)”, target fin opening data that matches the operation position of the selection dial 47 and the detection value of the layer thickness detection sensor 46 is stored in an opening data table (target fin opening data storage area). ), And then automatically controls the fin drive motor 43 in accordance with the deviation between the target fin opening data and the fin opening detection sensor value, and sets a predetermined flag in the driving confirmation flag FINFG. When the opening sensor abnormality flag is set, the set value of the drive confirmation flag FINFG is determined, and when the set value is other than “1 (close drive)”, While the drive stop state is maintained as it is, if the set value is “1”, the fin drive motor 43 is set to the predetermined time (the maximum required time until the most open position, for example, 2). 5 seconds) after driving by the open side, so as to maintain a driving stop state. In other words, when an abnormality occurs in the fin opening detection sensor 44, the chief sheave 38 is set to the most open state, so that the inconvenience of maintaining the closed state of the chaff sheave 38 and increasing the material loss can be prevented. Since the fin drive motor 43 is opened only when it is determined that the sensor is abnormal when the fin drive motor 43 is closed, useless motor drive can be avoided. The description of the “abnormality notification” (subroutine) executed when the sensor abnormality is determined is omitted.
[0019]
On the other hand, the “selection automatic control (second control mode)” uses the detection signal of the mission rotation sensor 14 and the setting signal of the selection dial 47 as input variables, and determines the fin target opening based on fuzzy inference. It is different from one control mode. That is, a first antecedent membership function using the mission rotation sensor value as an input variable, a second antecedent membership function using the selected dial value as an input variable, and a consequent using the fin target opening as an output variable. Performs fuzzy inference based on the membership function and fuzzy rules that set the relationship between each variable, and automatically controls the fin opening according to the inference result of the fuzzy inference. Can be performed.
[0020]
In the “selection automatic control (second control mode)”, a “rotation sensor check” for determining an abnormality of the mission rotation sensor 14 is executed as a subroutine. In this “rotation sensor check”, switching of the handling depth main sensor 21 from OFF to ON is determined, and at the time of this determination, the detection signal of the mission rotation sensor 14 is checked. Here, when the detection signal of the mission rotation sensor 14 is abnormal, the rotation sensor abnormality flag is set and the maximum speed data of the vehicle speed is set in the mission rotation sensor data. That is, when an abnormality occurs in the transmission rotation sensor 14, the opening of the chief sheave 38 is controlled based on the maximum vehicle speed setting, thereby preventing the disadvantage that the chief sheave 38 is kept closed and the material loss increases. I can do it. In the present embodiment, the traveling state is recognized using the detection signal of the handling depth main sensor 21, and if the detection signal of the mission rotation sensor 14 is not input at the time of the traveling recognition, it is determined that the sensor is abnormal. However, the travel recognition may be performed based on a detection signal from a shift lever sensor that detects the operation position of the travel shift lever.
[0021]
In the configuration as described above, the fin drive motor 43 for adjusting the fin opening of the chaff sheave 38, the fin opening detection sensor 44 for detecting the fin opening of the chaff sheave 38, and the selection for automatically controlling the fin drive motor 43 The selection control unit 49 determines whether the fin opening degree detection sensor 44 is abnormal, and drives the fin drive motor 43 in the fin opening direction for a predetermined time when the abnormality is determined. The inconvenience of maintaining the closed state of the chaff sheave 38 can be avoided. As a result, the inconvenience of increasing the material loss can be prevented, although the sorting accuracy is slightly reduced.
[0022]
Further, when the drive of the fin drive motor 43 continues in the same direction for a predetermined time or more, the fin opening detection sensor 44 is determined to be abnormal. The routine can be simplified.
[0023]
Further, the fin drive motor 43 is driven in the fin opening direction only when a sensor abnormality is determined during the fin closing drive, so that useless motor drive cannot be prevented. Can be avoided.
[Brief description of the drawings]
FIG. 1 is a plan view of a combine.
FIG. 2 is a power transmission diagram of a transmission.
FIG. 3 is an internal side view of a threshing sorting unit.
FIG. 4 is a side view of a main part of the same.
FIG. 5 is a side view of the swing assembly.
FIG. 6 is a plan view of the same.
FIG. 7 is an enlarged plan view of a main part of the above.
FIG. 8 is a side view of the fin.
FIG. 9 is a front view of a layer thickness detection sensor.
FIG. 10 is a plan view of a setting dial.
FIG. 11 is a block circuit diagram showing inputs and outputs of a selection control unit.
FIG. 12 is a flowchart of “auto stop control”.
FIG. 13 is a flowchart of “sorting automatic control (first control mode)”.
FIG. 14 is an explanatory diagram of an operation of “sorting automatic control (first control mode)”.
FIG. 15 is a flowchart of “sorting automatic control (second control mode)”.
FIG. 16 is an explanatory diagram of data used for fuzzy inference.
FIG. 17 is a flowchart of “rotation sensor abnormality check”.
FIG. 18 is an explanatory diagram of an operation of “rotation sensor abnormality check”.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Combine 3 Threshing sorting part 38 Chaff sheave 40 Fin 43 Fin drive motor 44 Fin opening degree detection sensor 46 Layer thickness detection sensor 47 Sorting dial 49 Sorting control part

Claims (2)

A fin opening adjustment mechanism that adjusts the fin opening of the chaff sheave based on the drive of the actuator, a fin opening detection sensor that detects the fin opening of the chaff sheave, and a selection automatic control unit that automatically controls the fin opening adjustment mechanism. The sorting automatic control unit, a sensor abnormality determining means for determining an abnormality of the fin opening detection sensor, when the abnormality of the fin opening detection sensor is determined, the actuator in the fin opening direction for a predetermined time An abnormal-time fin opening drive means for driving, and the sensor abnormality determining means determines that the fin opening degree detection sensor is abnormal when the actuator drive output in the same direction continues for a predetermined time. . A fin opening adjustment mechanism that adjusts the fin opening of the chaff sheave based on the drive of the actuator, a fin opening detection sensor that detects the fin opening of the chaff sheave, and a selection automatic control unit that automatically controls the fin opening adjustment mechanism. The sorting automatic control unit, a sensor abnormality determining means for determining an abnormality of the fin opening detection sensor, when the abnormality of the fin opening detection sensor is determined, the actuator in the fin opening direction for a predetermined time Abnormal fin opening driving means to be driven, and the abnormal fin opening driving means drives the actuator in the fin opening direction for a predetermined time only when the sensor abnormality determining means determines an abnormality during the fin closing driving. Characteristic sorting device.

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