JPH10155348A - Threshing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a threshing device capable of evading sorting defects and clogging and improving sorting operability and sorting accuracy by providing a means for setting the upper and lower limit values of the automatic adjustment range of the angle of a fin corresponding to a specified kind or the like. SOLUTION: This threshing device is provided with the angle change means of the fin in a chaff sheave, the detection means of a threshing processing amount, the specifying means of the kind of the grain of an object to be threshed, the means for automatically adjusting the angle of the fin based on the detected threshing processing amount and the specified kind of the grain and the means for setting the upper and lower limit values of the automatic adjustment range of the angle of the fin corresponding to the specified kind. Also, the controller 80 of the threshing device is constituted of a CPU 81, an RAM 82, an ROM 83, an input interface 84 and an output interface 85.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a threshing apparatus such as a combine or a threshing machine.

[0002]

2. Description of the Related Art A threshing apparatus is one in which a harvested grain culm is threshed by a handling cylinder, and is sorted by a swinging sorter to take out granules. The swing sorter is composed of a swing sorter, a chaff sheave, a straw rack and the like, and further sorts the grains selected by the swing sorter through a gap between the fins of the chaff sheave.

Recently, a threshing apparatus which is configured to change the tilt angle of the fins of the chaff sheave and changes the tilt angle of the fins of the chaff sheave, that is, the gap between the fins in accordance with the grain flow rate, thereby improving the sorting accuracy. Is being developed. In the case where the processing cylinder is also provided, the amount of the second reduced product returned to the processing cylinder affects the quality of the threshing process. For this reason, in a threshing device provided with a processing cylinder, it is desirable to change the fin sensitivity in accordance with the second reduction amount.

However, in the case where the fin angle is automatically adjusted in accordance with the amount of the second reductant, the shape, size, and the like of the threshing target conditions, that is, the type and kind of grain, are varied. It is not appropriate to perform automatic adjustment uniformly because the water content and the like also vary depending on the growth conditions, field conditions, and the like.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and enables automatic adjustment of the fin angle based on the amount of threshing processing. It is another object of the present invention to provide a threshing apparatus that can improve the fin angle according to the type of grain and set a lower limit value to avoid an abnormal state.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a threshing apparatus which sorts a grain, which has been threshed by a handling cylinder, by using a chaff sheave capable of changing a fin angle, wherein the fin angle is determined based on a threshing amount. The automatic adjustment is performed, and when the automatic adjustment is started, the fin angle is set to a state corresponding to the kind of the grain.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings showing the embodiments. FIG. 1 is an external perspective view of a harvester equipped with a threshing apparatus according to the present invention. In the drawing, reference numeral 3 denotes a threshing device mounted on the upper part of the fuselage above the steering crawler 1, and is located at the front of the fuselage and includes a weeding rod 4, a cutting blade 2, a raising device 7, and the like. The grain stalks cut by K are supplied to the threshing device 3 via upper and lower transport devices (not shown) and the like, and are subjected to threshing. The grain after threshing is supplied to the paddy tank 5.

In the figure, reference numeral 9 denotes an operation column provided in front of the driver's seat 8; and 10, a vertical conveying device, the end of which faces the starting end of the feed chain 12 of the grain stalk clamping and transferring device. In the vicinity of this, there is provided a grain stalk sensor 6 for detecting the feeding of the grain stalk to the threshing apparatus. The cereal culm sensor 6 is not limited to this position, and may be on the side of the start end of the cereal culm clamping / transferring device 11 or in a transport path of the vertical transport device 10 or the like. The machine may be configured to be shared with a sensor provided for detecting the culm length. The culm clamping and transferring device 11 is composed of a feed chain 12 and a clamping rod 13, and is a threshing device 3.
It is provided along the handle.

FIG. 2 is a partially broken longitudinal sectional view of the threshing apparatus 3. The threshing device 3 is a handling room 1 formed in the upper part of the casing 14.
5, a handle cylinder 17 having a large number of teeth 16, 16... Is mounted on a shaft, and a mouth is extended in parallel with the axial direction of the handle cylinder 17. A receiving net 18 is stretched, and a swing sorting device 19 substantially parallel to the axial direction of the handling cylinder 17 is provided below the handling chamber 15. Further handling cylinder 1
A processing chamber 50 for reprocessing the second reduced product is provided at a position on the upper right side (close to the center of the body) of the processing chamber 7. A processing cylinder 51 having a large number of teeth 52, 52,...

The swing sorting device 19 includes a swing sorter 20 extending in an inclined manner, an angle variable type chaff sheave 21 provided below a rear portion of the swing sorter 20, and a rear end of the chaff sheave 21. The handle rack 17 is configured to swing in the axial direction of the handling cylinder 17 by swing arms 23 and 24 that swing in conjunction with a drive source.

Below the rocking and sorting device 19, a first grain take-out portion (most mouth) 27 composed of a first grain plate 25 and a first screw 26, a second grain plate 28 and a second screw.
A sorting wind path 31 having a second grain take-out section (second opening) 30 composed of 29 is formed.

The grains dropped to the first grain take-out section 27 are sent from the first screw 26 to the paddy tank 5, and the grains dropped to the second grain take-out section 30 are removed from the second screw 29 by the blower 47. It is blown up inside the numbered lower cylinder 48 and dropped onto the processing drum 51 from a processing drum cover 53 projecting above the processing chamber 50 of the roof plate of the threshing device 3 to be re-sorted. . The second screw 29 is provided with a second rotation sensor 69 for detecting the number of rotations of the screw 29, and the processing cylinder cover 53 is provided with a second sensor for detecting the amount of the second reduced substance returned to the processing cylinder. 60
Is provided.

In the air passage 31, a grain sheave 32 is provided below the chaff sheave 21, and a Karamin device 33 is provided on the blast side of the air passage 31. After the airflow from the Karino device 33 is rectified by the rectifying plates 34 and 35, the airflow passes through the air passage 31 and the dust outlet (third port) at the rear of the body.
It is configured so that air is exhausted from the outside of the machine.

A suction / discharge device 37 using an axial fan is provided above and behind the straw rack 22. An upper suction cover 38 is provided above the suction / discharge device 37, and a lower suction cover 39 is provided below. The suction port 40 of the suction / discharge device 37 is opened to the air passage 31 side, and the discharge port 41 is opened toward the dust port 36.

Above the upper suction cover 38, a downward gutter, that is, a fourth gutter 43 is extended diagonally upward from both ends to form a fourth gutter 44, and a stalk taken out from the culm after threshing, that is, the waste straw. The grains are reduced above the straw rack 22.

FIG. 3 is a side sectional view showing the periphery of the fin angle changing operation lever shown together with a part of the chaff sheave. The chaff sheave 21 has a large number of fins 21b extending in the left-right direction of the body arranged in the front-rear direction between left and right frame members (not shown) extending in the front-rear direction of the body. It is pivoted on the lumber. The lower portion of each fin 21b is pivotally supported by one adjusting connecting rod 21c extending in the front-rear direction.
The middle of the rotating shaft 21d is fixed to the front of the adjusting connecting rod 21c. The rotating shaft 21d is pivotally supported at a position above the adjusting connecting rod 21c.
The front end of e is locked. The other end of the tension spring 21e is locked at an appropriate place in the threshing room. One end of a push-pull wire 21f is locked to the lower end of the rotating shaft 21d,
The other end of the push-pull wire 21f is pivotally supported by a turning piece 72 attached to a base end of an operation lever 71 provided on the front of the threshing device 3 on the side of the driver's seat 8.

Accordingly, by the pulling operation of the push-pull wire 21f, the lower part of the rotating rod 21d is rotated backward, the adjusting connecting rod 21c is moved rearward, and the fin 21b stands up and the fin angle (the adjusting connecting rod with the fin 21b is adjusted). Angle made with rod 21c)
γ increases, and the gap between the fins 21b increases. On the other hand, when the push-pull wire 21f is pressed, the rotating rod 21
The lower part of d is rotated forward, the adjusting connecting rod 21c moves forward, the fin 21b is tilted, and the fin angle γ becomes small,
The gap between the fins 21b becomes smaller.

The operating lever 71 is provided on the front right side of the threshing device 3 and can be operated by an operator sitting in the driver's seat 8. An operation panel 70 is attached to the front side of the operation lever 71 on the front surface of the threshing device 3, and a U-shaped frame 77 whose front part is open is attached to a rear surface of the operation panel 70, An operation lever 71 is pivotally supported on the side of the frame 77. A front portion of the operation lever 71 projects forward through an elongated hole formed in the operation panel 70, and a lower portion of a rectangular rotating piece 72 is fixed to a base end thereof. Push-pull wire 21f
Is locked at one end.

A rotary shaft 75 is vertically mounted on a front portion of the frame 77, and a feed member 76 using a spiral is fixed to the rotary shaft 75 at both ends and intermediate suitable portions. The lower end of the rotation shaft 75 projects downward from the frame 77, and this projection is inserted into the gear box 74. The gear box 74 is mounted on a motor 73 whose output shaft is forward, and the driving force of the motor 73 is transmitted to the rotating shaft 75 by the worm gear, so that the feed member 76 rotates.

The aforementioned operating lever 71 is urged against the rotating shaft 75 by an appropriate method (not shown).
6 between the spirals.

Therefore, the motor 73 is driven to drive the feed member 7
6 rotates, the operation lever 71 is sent to the spiral of the feed member 76 and moves vertically, and the operation lever 71 can be manually operated by disengaging from the spiral of the feed member 76. It is possible. When the operation lever 71 is rotated in the direction shown by the solid line (or broken line) in FIG. 3 by manual operation or by the reverse rotation (or forward rotation) of the motor 73, the push-pull wire 21f is pulled (or pressed) by the fin 21b.
Rises (or tilts), and the gap between the fins increases (or decreases). A lever position detection sensor 78 using a potentiometer is provided at a base pivot portion of the operation lever 71, and a voltage corresponding to the rotation position of the operation lever 71 is provided.
Therefore, a voltage corresponding to the fin angle is output from the sensor 78.

FIG. 4 is a circuit diagram of a control system of a harvester equipped with the device of the present invention. In the figure, reference numeral 80 denotes a control device using a microcomputer.
2, an ROM 83, an input interface 84, and an output interface 85.

[0023] The input port a ₀ at the input interface 34, provided at the base end portion of the vehicle speed lever for changing aircraft speed, the output of the vehicle speed sensor 58 using a potentiometer for outputting a potential corresponding to the rotation amount of A / D converter 5
The vehicle speed is discriminated into three stages of high speed, medium speed and low speed from the output of the A / D converter 59.

A detection signal of the second sensor 60 is supplied to the input port a ₁ of the input interface 84 by the A / D converter 6.
The signal is converted into a digital signal at 1 and input. The input port a ₂ is provided at the base end of the fin angle changing operation lever 71 of the chaff sheave 21, and the output of the lever position detection sensor 78 using a potentiometer is converted into a digital signal by the A / D converter 62. It has been converted and entered.

[0025] The input port a ₂ is connected to thresh switch 63 which is turned on when the threshing clutch and engaged state, the input port a ₃ to a high level by turning on the threshing switch 63.

[0026] input port a ₄ is connected with a switch 64 reaper which is turned on when the reaper clutch and engaged state, the input port a ₄ by turning on the switch 64 reaper becomes high level.

[0027] The input port a _5, automatic switch 6 to be turned on when should be adjusted automatically fin corner of chaff sieve
5 is connected, the input port a ₅ becomes high level by turning on the said auto switch 65.

[0028] input port a ₆ is grain to be threshed are connected grain changeover switch 66 is switched operated in accordance with the case of wheat in the case of rice, in the case of wheat the input port a ₆
Is set to a high level, the switch 66 is turned on.

[0029] The input port a ₇ is connected to semi-wet changeover switch 67 which grain to be threshed is switched operated depending on whether the humidity material is dry material, the input in the case of Shimezai port the switch 67 is turned on so as to the a ₇ to a high level.

[0030] The input port a ₈ are connected culms sensor 6 for detecting the conveyance of the culms into the aforementioned threshing apparatus, when the sensor 6 detects the conveyance of the culms, the input port a ₈ is high Become a level.

The output of the switch circuit 68 is given to the input port a ₉ , and the switch circuit 68 is turned on and off by the output of the second rotation sensor 69.
There switch circuit 68 when the sensor 69 outputs a high level by detecting the low rotation of the secondary auger 29 input ports a ₉ ON goes high. The switch circuit 68
Is supplied to a light emitting diode (LED) 99 whose one end is body-grounded.

The output port b _{1 of the} output interface 85
Is connected to a switch circuit 68, and when the switch circuit 68 is turned on, the light emitting diode 91 is turned on. Output port b ₁ are those control device 80 outputs a high level signal when not operating normally, the light emitting diode 91 by the high level signal is turned on.

[0033] The output port b ₂ is connected a switch circuit 87, the light emitting diode 92 is turned on by turning on of the switch circuit 87. Output port b ₂ each _sensor, which switches outputs a high level signal when not operating normally, the light emitting diode 92 is turned on by the high level signal.

[0034] The output port b ₃ is connected to the switch circuit 88, the automatic lamp 93 is turned on by turning on of the switch circuit 88. The main port b ₃ is the chaff sheave 21
When the automatic switch 65 for automatic adjustment of the fin angle is turned on, a high level signal is output, and the automatic lamp 93 is turned on by the high level signal.

[0035] The output port b ₄ is connected a switch circuit 89, the exciting coil 94C of the electromagnetic relay 94 is energized by turning on of the switch circuit 89. This electromagnetic relay 9
4 has an interlocking normally open contact 94a and a normally closed contact 94b, and the normally open contact 94a is connected to the power supply line and the chaff sheave 21.
The fin 21b is tilted and raised, and is interposed between one end of a driving motor 73 for driving the operation lever 71 (a terminal which becomes a high voltage when the motor 73 is reversed) and the normally closed contact 94b is connected to the motor 73. Between the terminal and the body earth. Output port b ₄ outputs a signal when (case of decreasing the fin angle) to the high level tilting the fin 21b of the chaff sieve 21.

[0036] The output port b ₅ is connected to the switch circuit 90, the exciting coil 95c of the electromagnetic relay 95 is energized by turning on of the switch circuit 90. This electromagnetic relay 9
5 has an interlocking normally open contact 95a and a normally closed contact 95b, and the normally open contact 95a is a power supply line and the other end of the motor 73 (a terminal which becomes a high voltage when the motor 73 is rotated forward).
The normally closed contact 94b is interposed between the same terminal of the motor 73 and the body earth.
Output port b ₅ outputs a signal when (when increasing the fin angle) to the high level to erect the fins 21b of the chaff sieve 21.

[0037] Thus, when the output port b ₄ becomes high level, the exciting coil 94c of the electromagnetic relay 94 is energized, the motor 73 is reversed to its normally open contact 94a is closed, the output port
b ₅ is at a high level when the exciting coil 95 of the electromagnetic relay 95
c is excited, the normally open contact 95a is closed, and the motor 7
3 is driven forward.

[0038] The output port b ₆ is connected to the switch circuit 96, the alarm from the on-buzzer 97 and the LED 98 to the switch circuit 96 is turned on. The output port
b _6, as described below, and outputs a high level signal when the double-dip reduced amount even if the upper or lower limit value of the control range fin angle of the chaff sieve 21 in the automatic adjustment does not become a predetermined range.

The operation of the harvester having such a configuration will be described. When manually adjusting the fin angle, the automatic switch 65 is turned off, the operation lever 71 is operated to release the engagement with the feed member 76, and the lever 71 is turned.
The push-pull wire 21f is pulled or pressed, the fin 21b stands or tilts, and the fin angle becomes larger or smaller.

When harvesting and threshing operations are performed by running the machine in such a state, the cereal stalks cut by the cutting section K are sent to the cereal stalk-clamping transfer device 11 of the threshing device 3. The spikes of the cereal stem passed on by the cereal stem clamping and transferring device 11 are inserted into the handling chamber 15 through the handle of the threshing device 3 and the teeth 16, 16,... The threshing process is carried out by the threshing process.
, Falls on a swing sorting device 19, and the specific gravity is sorted by the swing of the device 19, and the first thing such as fine granules passed through the gap between the fins 21 b of the chaff sheave 21. Falls to the first take-out part 27, and the second reduced product and the third product are discharged from the straw rack 22
The straw is blown up, hits the prevention cloth 42, falls on the straw rack 22, and is re-sorted while being crushed by the swinging motion of the straw rack 22, so that the ear-cut grains,
The second reducts such as spikelet attached particles fall to the second extraction unit 30,
It is blown up from the second screw 29 by the blower 47 to the inside of the second lower cylinder 48 and is re-sorted by the processing cylinder 51. A relatively large piece of straw or the like is transported backward while being interfered by the prevention sheet 42 by the wind sent from the Karino device 22, and is discharged out of the machine through the dust outlet 36. The air is sucked from the suction port 40 of the dust device 37 and is discharged out of the machine through the air discharge port 41.

Next, the automatic adjustment of the fin angle in the chaff sheave 21 will be described with reference to the flowcharts of FIGS. First, when the key switch is turned on, the alarm counter BZ indicating that the buzzer 97 has sounded, the cutting flag K indicating that the cutting operation is being performed, and the cutting start flag D indicating that the cutting has been started are all reset (D = 0), and each condition is set corresponding to the grain to be threshed.

FIG. 6 is a flowchart of the condition setting control. In the condition setting control, first, whether the grain to be threshed is rice or wheat is determined based on the state of the grain changeover switch 66. Then, in the case of rice in which the grain changeover switch 66 is turned off, the value αi in rice is set as the upper limit α of the appropriate range of the amount of the second reductant, and the value βi in rice is set as the lower limit β. I do. In addition, a value Li of rice is set as the upper limit value (maximum value) L of the control range at the time of automatically adjusting the angle of the fin 21b in the chaff sheave 21.

Next, the rice to be threshed is set to the dry / wet selector switch 6
It is determined whether the material is a dry material or a wet material according to the state of 7, and when the wet / dry material is turned on, the lower limit value (minimum value) S of the control range at the time of automatically adjusting the angle of the fin 21b is determined. Is set as the wet material value of rice, and when the wet / dry switch 67 is turned off, the dry material value Sik of rice is set.

Further, the set value of the fin angle M set at the start of the automatic adjustment is changed according to the vehicle speed detected by the vehicle speed sensor 58. That is, when the vehicle speed is high, the value Mik for rice is set as the fin angle setting value M, Mih is set for medium speed, and Mit is set for low speed.

On the other hand, when the grain changeover switch 66 is turned off,
In the case of wheat, conditions are set in the same manner, and the value αm in wheat is set as the upper limit α of the appropriate range of the amount of the second reduced product, and the lower limit β
And the value Lm of wheat is set as the upper limit L of the control range of the fin angle at the time of automatic adjustment.

Next, the lower limit value S of the control range of the fin angle at the time of automatic adjustment is set according to whether the wheat to be threshed is a dry material or a wet material. That is, the dry / wet selector switch 6
In the case of the dry material 7 turned off, the value Smk of the dry material in wheat is set as the lower limit value S, and in the case of the dry material when the dry / wet selector switch 67 is turned on, the value Sms of the wet material in wheat is set. .

The upper and lower limits of the fin angle are set for the following reasons. In other words, the basis of the control of the fin angle is that the amount of the second reductant is set to the upper and lower limits α and β that are determined by the grain, but depending on the situation or the malfunction of the control system, the amount of the second reductant may be lower. In the control based on the detection result of the number of reduced product, there is a possibility that the fin angle becomes excessively large or small, which is considered only abnormal. Such a situation is avoided to prevent the occurrence of defective sorting or clogging.

Further, the set value of the fin angle M set at the start of the automatic adjustment is changed according to the set vehicle speed. That is, in the case of high speed, the value Mit of the low speed state in the case of rice described above is set, in the case of medium speed, the value Mmh of wheat is set, and in the case of low speed, the low value Mmt of wheat is set, respectively. I do.

As described above, the set values are different depending on rice and wheat, and between dry and wet materials. The upper and lower set values αm and βm of the appropriate range of the amount of the second reductant in the rice are respectively α
i <αm and βi <βm.

This is because culm breakage is more likely to occur in wheat than in rice, and the upper and lower limits of the appropriate range of the amount of the second reduced product are made larger than in the case of rice to increase the amount of the second reduced product. This is necessary, and by setting like this,
The amount of reductant to the chaff sheave 21 is increased to reduce the mixing of culm breaks into the first one, thereby improving the sorting accuracy.

The upper and lower limit values of the control range of the fin angle at the time of automatic adjustment are different between the case of rice and the case of wheat, and the lower limit value is also changed by rice, wheat, and its dryness and humidity. And the upper limit set value is Li
> Lm, and the lower limit setting values are Sis>Sik>Sms> Smk. This is because rice has lower leakage of chaff sieve than wheat, and wet material has lower leakage than dry material.Therefore, if the fin angle is small, dust may accumulate on the chaff sieve and cause clogging. Therefore, the fin angle control range for rice is generally larger than that for wheat,
Further, the control range of the wet material is made larger than that of the dry material.

Further, the set value of the fin angle set at the start of mowing differs between the case of rice and the case of wheat, and this set value differs depending on the vehicle speed. The values are larger than those in the case of wheat and the value of low speed, respectively, and Mik>Mih>Mit>Mmh> Mmt. It is necessary to increase the amount of the second reductant in wheat in order to increase the number of culm, etc., and to set the fin angle at the start of automatic adjustment in rice in case of rice due to poor leakage. It is necessary to improve the leakiness by reducing the sorting accuracy by making it larger than in the case of wheat, and when the vehicle speed is high, the grain flow rate increases and the amount of second reductant also increases On the other hand, when the speed is low, the grain flow decreases and the amount of the second reductant also decreases, so the fin angle at the start of automatic adjustment at high speed is set to a low value. This is because it is necessary to make the value larger than that at the time and to reduce the sorting accuracy so that the amount of the second reduced product does not become too large.

After setting such conditions, the control device 80 determines whether or not the mowing operation has been started based on the mowing start flag D, and if the mowing start flag D is in the reset state (D = 0). Assuming that the harvesting has not yet started,
The stored value P of the fin angle is stored as the fin set angle M at the start of mowing.

In this state, the automatic switch 65 is turned on to automatically adjust the fin angle, the threshing clutch is engaged to drive the threshing device 3, and the threshing switch 63 is turned on. The motor 73 is continuously driven to rotate forward so that the angle becomes the lower limit value S, and the fin angle is judged from the detection result p of the lever position detection sensor 78. When the fin angle becomes the lower limit value S, the driving of the motor 73 is stopped. I do.

When the machine is driven in such a state to start the harvesting and threshing work, the harvested grain culm is conveyed to the threshing device 3, the grain culm sensor 6 is turned on, and the automatic lamp 93 is turned on. To inform that automatic adjustment can be performed. Then, when the reaping clutch is engaged, that is, when the reaping switch 64 is on, and the reaping flag K
The If is reset (K = 0), during the predetermined time T ₁ performs sorting fins angle as the smallest accurate sorting condition S, the fin corner waiting for a predetermined time T ₁ elapses, the aforementioned The motor 73 is continuously driven in reverse to set the angle M at the start of mowing. And the lever position detection sensor 7
When it is detected that the fin angle has reached the set angle M based on the detection value p of 8, the driving of the motor 73 is stopped, and the cutting flag K indicating that the cutting operation has been started is set (K = 1). .

This is because, at the start of the threshing operation, the amount of the second reductant is unstable because the amount of threshing is not constant, and the detection result of the second sensor 60 is extremely unstable. to automatically adjust the fins angle based, because sorting accuracy decreases significantly after being conveyed culms, the predetermined time T _1, the lowest limit state S of the control range of the fin angle of automatic adjustment, i.e. most performs sorting sorting accuracy at a high state, as soon as possible fin angle after a predetermined time T ₁ elapses threshing amount is stabilized and set angle M, after a such a state, focusing on the state of the fin angle M, fin angle Is controlled by intermittently driving the fin 21b in accordance with the amount of the second reductant based on the detection result of the second sensor 60.

On the other hand, the automatic switch 65 and the threshing switch 6
In the non-working state in which one of the three is turned off or in the fin angle manual adjustment state, the automatic lamp 93 is turned off, and in the working state in which both switches 65 and 63 are turned on, the grain culm sensor 6 does not detect the transported grain culm , The automatic lamp 93 is turned on and off, and the motor 73 is continuously driven so that the fin angle becomes the lower limit value S in the automatic adjustment.
b is set to the state of the highest sorting accuracy with the most inclined, and the state is such that the grain stalk may be transported.

Next, the control of the fin angle based on the amount of the second reduced substance detected by the second sensor 60 will be described with reference to the flowchart of FIG. First, the alarm counter BZ checks whether or not the buzzer 97 has already sounded.
Is in the reset state (BZ = 0) and the buzzer 97 has not sounded yet, the fin angle p corresponding to the lever position detected by the lever position detection sensor 78 is read as the stored value P. Then, when the amount of the second reductant detected by the second sensor 60 is equal to or more than the upper limit value α (or equal to or less than the lower limit value β) at which the chaff sieve 21 can perform appropriate sorting, the fin angle becomes smaller than the control range during the automatic adjustment. It is determined from the detection value p of the lever position detection sensor 78 whether or not the value is not less than the upper limit L (or not more than the lower limit S). 7 and 8), the motor 73 is rotated backward (or forward) for a short predetermined time to increase (or decrease) the fin angle by a predetermined amount Δp. The gap between the fins 21b is made large (or small) to increase (or decrease) the amount of grains and the like passing through the gap, and to reduce (or increase) the amount of grains to the second extraction portion 30 (2). . When such control is performed, the mowing start flag D is set (D = 1),
The alarm counter BZ is reset (BZ = 0). If the second reductate amount does not fall within the predetermined range (α to β) due to the change in the fin angle Δp due to the short-time driving of the motor 73, the motor 73 is driven again for a short time to reduce the fin angle again to Δp. , And the motor 73 is driven intermittently until the second reduced product falls within the predetermined range.

In this case, the fin angle changes by Δp by driving the motor 73 for a predetermined time, and if the secondary reduction amount is within a predetermined range, the motor 73 is not driven and the fin angle is not changed. Detection value p of lever position detection sensor 78
However, despite the driving of the motor 73, the fin angle does not match the fin angle (P + △ p or P− △ p) expected from the motor driving, or the fin angle is not changed even though the fin angle is not changed. If it has changed (3), it is determined that the fin angle has been changed by manually operating the operation lever 71, and the predetermined manual holding control shown in FIG. 8 is performed.

FIG. 8 is a flowchart of the manual holding control. When it is determined that the operation lever 71 has been manually operated, first, the operation amount is determined by the lever position detection sensor 7.
Judgment is made from the detected value p in Step 8 to check whether the fin angle exceeds the fin angle control range (S to L) at the time of automatic adjustment (4, 5). If the fin angle is within the range in which the fin angle can be automatically adjusted (S ≦ p ≦ L), the state of the manually operated fin angle is held for a predetermined time T ₄ to give priority to the manual operation state (6). Then, the mowing start flag D is set to a set state (D = 1), the alarm counter BZ is set to a reset state (BZ = 0) (see FIG. 7), and the automatic adjustment based on the second reductant amount is restarted.

On the other hand, when the fin angle p is smaller than the lower limit value S (or larger than the upper limit value L) of the control range in the automatic adjustment by operating the operation lever 71, a predetermined value is set so that this manual operation state is prioritized. time T ₅ holds the state of the manually operated fin angle (7), was then reverse the motor 73 for a short predetermined time (or forward) is brought by increasing the fin angle (or decrease) is, like this If the fin angle is not within the predetermined range even after driving the motor 73, the fin angle is further increased (or decreased), and eventually the fin angle is intermittently increased (or decreased), thereby increasing the fin angle. Within the control range in automatic adjustment (S to L), in this state, the cutting start flag D is set (D = 1) and the alarm counter BZ is reset (BZ = 0) (8), the second reduction To quantity Resume the automatic adjustment that brute.

[0062] predetermined time T ₅ in this case, change of the fin angle by the above-mentioned manual operation in the control range of the automatic adjustment (s to
It is set to be longer than the predetermined time T ₄ when it is L). In some cases, T ₄ = T ₅ or T ₄ > T
_May be ₅ .

In such a configuration, when a manual operation is performed with respect to a temporary change in the amount of cut culm and the amount of the second reductant, the manual operation is prioritized and the state is maintained for a predetermined time. It is intended to improve the workability by coping with the temporary change and thereafter returning to the automatic adjustment based on the amount of the second reductant.

When the fin angle is out of the control range of the automatic adjustment by manual operation, the fin angle is set within the control range in the automatic adjustment after a predetermined time has elapsed, and thereafter, the automatic control is returned to the automatic adjustment. Runaway when resumption of adjustment is prevented.

On the other hand, when the amount of the second reduced product is within an appropriate range (α to
β), if the second reduction amount does not fall within the appropriate range (α to β) due to the intermittent driving of the motor 73 by automatic adjustment, the motor 73 sets the fin angle to the upper and lower value L (or the lower limit value S) of the control range. ) (See FIG. 9, FIG. 7). When the fin angle reaches the upper limit L (or lower limit S) of the control range and the sorting accuracy becomes the lowest (or highest) at the time of automatic adjustment, the alarm counter BZ sets the upper limit (or lower limit) of the fin angle. Is measured, and the count is advanced by "1" at regular intervals (10). Chaff sieve 21 performs sorting in such a state, but the alarm counter predetermined time count contents until the T ₂ of the BZ, double-dip reduction amount is not within the proper range, the fin angle upper limit (or lower limit) When the state continues for the predetermined time, the buzzer 97 sounds and the light emitting diode 98 is turned on (11).

If the amount of the second reduced product is not within the proper range, the fin angle of the chaff sheave 21 is selected as the upper or lower limit of the control range in the automatic adjustment so that the second reduced product is within the proper range. If the amount of the second reductant does not fall within the appropriate range even after the predetermined state continues for a predetermined time, it is an abnormal state in which the cuff sheave is clogged or the like. The buzzer 97 is sounded and the light emitting diode 98 is turned on to notify the driver that an abnormality has occurred, assuming that the number of the number of reduced substances does not fall within the appropriate range.

As described above, when the buzzer 97 is sounded and the light emitting diode 98 is turned on, the dry / wet selector switch 67 is turned on.
Is switched from the off state to the on state, that is, from the dry material setting to the wet material setting, or from the on state to the off state, that is, from the wet material setting to the dry material setting, or the kernel switch 66 is turned from the off state to the on state, that is, the rice When the setting is changed from the setting to the wheat setting or from the on state to the off state, that is, from the wheat setting to the rice setting, the setting value in the condition setting control described above is changed, and the upper and lower limits of the appropriate range of the second reduction amount are changed. Since the set values of the upper and lower limits of the fin angle are changed respectively, the sounding of the buzzer 97 and the lighting of the light emitting diode 98 are stopped, and the fin angle is changed corresponding to each set value. If the second reduction amount does not become an appropriate state even after the fin angle is changed, the buzzer 97 is sounded again and the light emitting diode 98 is turned on.

If the dry / wet selector switch 67 or the grain selector switch 66 is not properly operated, an appropriate selection is not performed and an alarm is issued. In such a case, the alarm is temporarily stopped, each set condition is changed, and thereafter, if the second reduction amount does not become an appropriate state, the alarm is issued again.

On the other hand, the driver knows that the second reduction amount is abnormally large (or small) by the sounding of the buzzer 97 and the lighting of the light emitting diode 98, and automatically adjusts the operation lever 71 in order to eliminate the abnormality promptly. Is rotated to the upper limit value L or more (or the lower limit value S or less) of the control range to set the fin angle to a lower (or higher) sorting accuracy.

With this operation, the sound of the buzzer 97 is stopped, and the light emitting diode 98 is turned off (12).
Further, the state of the manually operated fin angle is maintained, and the second reduction amount is quickly set to an appropriate range. And when the double-dip reduction amount becomes appropriate range (α~β) in it holds the manually operated fin angle state for a predetermined time T _6, (13), a predetermined time positive short the motor 73 thereafter When the fin angle is reduced (or increased) by a predetermined amount (14), and the fin angle is not within the control range (L to S) of the automatic adjustment by the short-time driving of the motor 73. Then, the motor 73 is driven again for a short time, and the motor 73 is driven intermittently until the fin angle falls within the control range (L to S) of the automatic adjustment. Then, the fin angle is controlled automatically (L ~
When the value falls within S), the automatic adjustment control is restarted, and thereafter the fin angle is intermittently driven according to the amount of the second reductant as described above.

In such an operation, the amount of second material falling into the second grain take-out section 30 increases, and the second screw 2
When the second rotation sensor 69 detects that the load 9 has become overloaded and its rotation speed has dropped below a predetermined value, the automatic adjustment of the fin angle of the chaff sheave 21 is prohibited, and the automatic lamp 93 is turned off. The motor 73 is continuously rotated in reverse so that the fin angle becomes the upper limit value L of the control range in the automatic adjustment, the amount of the kernel passing between the fins 21b is increased, and the amount of the kernel falling to the first grain taking-out section 27 first Is increased, the amount of the second material falling on the second grain take-out unit 30 is reduced. In this case, the fin angle p at the time when the second screw 29 is overloaded is stored as the stored value P, and when the overload is eliminated, the fin angle is immediately set to the value P, and in such a state. Automatically adjusts the fin angle.

At the end of the harvesting operation in one stroke, there is no transported cereal culm, and the cereal culm sensor 6 is turned off. Since the amount of the second reductant is also unstable, if the fin angle is controlled based on the amount of the second reductate, the sorting accuracy is remarkably reduced. Therefore, the automatic adjustment based on the amount of the second reductant is prohibited, and the automatic lamp 93 is turned on. and then, with culms sensor 6 stores the fin angle p at the time of the off as stored value P, and the motor 73 so that the fin angle of the chaff sieve 21 after a predetermined time T ₃ is the lower limit value S of the control range of the automatic adjustment The fins are continuously driven, and the fins are sorted in the most inclined state, that is, the state with the highest accuracy. At this time, the mowing flag K is reset (K = 0). The finished cutting work one stroke, performs turning to the next step, starting again cutting work, culms are detected by the sensor 6, the predetermined time T ₁ grain flow is small, chaff sieve 2
1 is performed as a high sorting accuracy state in which the fin angle has reached the lower limit S, but after a predetermined time T _{1 has} elapsed,
The fin angle is used as the stored value at the end of the above-described cutting, and in that state, the automatic start of the fin angle based on the second reduced amount is restarted.

Therefore, even at the beginning of mowing in one stroke, sorting is first performed in a high sorting accuracy state, and after a lapse of a predetermined time, the final fin angle at the time of automatic fin angle adjustment in the previous stroke is set. The fin angle is continuously driven, and automatic adjustment is resumed in this state.

On the other hand, the automatic adjustment of the fin angle when the threshing operation is performed manually by the harvester having such a configuration without performing the cutting operation will be described.

When the automatic switch 65 is turned on to automatically adjust the fin angle, and the threshing switch 63 is turned on with the threshing clutch engaged, the fin angle of the chaff sheave 21 becomes small as in the above-described harvesting operation. Therefore, the sorting accuracy is the highest. When the cereals to be threshed are inserted into the handling room 15 in this state, the cereal sensor 6 is turned on. In this case, since the threshing is manually performed, the cutting clutch is in the disengaged state, and the cutting switch 64 is in the off state, so that the fin angle is automatically adjusted immediately without setting the fin angle to the standard state. The automatic adjustment is started in the state of the fin angle where the sorting accuracy is high, and the automatic adjustment is performed centering on the state of the fin angle. The subsequent automatic adjustment is the same as the automatic adjustment at the time of the harvesting operation described above, and the fins 21b are intermittently driven so that the amount of the second reductant becomes a predetermined value.

In the above embodiment, the fin angle is automatically adjusted based on the amount of the second reductant.
Alternatively, a configuration may be adopted in which automatic adjustment is performed based on the first flow rate, the third flow rate, the grain culm supply amount, and the like.

[0077]

According to the present invention, high-precision sorting corresponding to the type of grain, such as rice and wheat, and finely corresponding to the threshing amount can be performed. In addition, while controlling according to the threshing processing amount, abnormal fin angles that cannot be considered for each type can be reliably prevented by setting the upper and lower limit values. Even if some kind of abnormality such as a defect occurs, excellent effects such as sorting failure and clogging can be avoided.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a harvester equipped with the present invention device.

FIG. 2 is a longitudinal sectional view of the device of the present invention.

FIG. 3 is a side view of a main portion of the chaff sheave and a periphery of an operation lever.

FIG. 4 is a main part electronic circuit diagram of the harvester equipped with the present invention device.

FIG. 5 is a flowchart for explaining the operation.

FIG. 6 is a flowchart for explaining the operation.

FIG. 7 is a flowchart for explaining the operation.

FIG. 8 is a flowchart for explaining the operation.

[Explanation of symbols]

 Reference Signs List 3 threshing device 6 grain culm sensor 11 grain culm clamping and transferring device 17 handle cylinder 21 chaff sheave 21b fin 27 first grain take-out part 29 second screw 30 second grain take-out part 50 processing room 51 processing cylinder 58 vehicle speed sensor 60 second sensor 63 Threshing switch 64 Harvest switch 65 Automatic switch 66 Grain switch 67 Dry / wet switch 69 Second rotation sensor 71 Operation lever 73 Motor 76 Feed member 78 Lever detection sensor 80 Control device 97 Buzzer

Claims (1)

[Claims] 1. A means for changing the angle of a fin in a chaff sheave, a means for detecting a threshing amount, a means for specifying a type of grain to be threshed, and a fin based on the detected threshing amount and a specified type of grain. A threshing apparatus comprising: means for automatically adjusting the angle of the fin; and means for setting upper and lower limits of the automatic adjustment range of the angle of the fin according to a designated type.