JPH06296429A - Threshing apparatus - Google Patents

Abstract

PURPOSE:To improve the selection accuracy and prevent the improper selection and clogging by varying the fin angle of a chaff sieve according to the kind and the treating amount of grains and setting the upper and lower limits of the angle. CONSTITUTION:A number of fins 21b of a chaff sieve are tilted with an operation lever 71 via a push-pull wire 21f to adjust the fin angle. The operation lever is engaged with the spiral of a feeding member 76 to enable the upper and lower shifting of the operation lever by the rotation of the feeding member with a motor 73. The position of the operation lever is controlled to adjust the fin angle by a controller with the motor 73 according to the kind and the treating amount of the grains. The upper and the lower limits of the adjustable range of the fin angle are also set by the controller to prevent the tilting of the fin to an abnormal angle.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art A threshing device is a device for threshing a cut culm by a handling barrel, selecting it by an oscillating sorting device, and taking out fine grains. The oscillating sorter is composed of an oscillating sorter, a chaff sheave, a straw rack, and the like, and the grains whose specific gravity has been sorted by the oscillating sorter are further sorted by passing through the gaps between the fins of the chaff sheave.

Recently, the tilting angle of the fins of the chaff sheave is changeable, and the tilting angle of the fins of the chaff sheave, that is, the gap between the fins is changed according to the grain flow rate, and the threshing device is improved in the sorting accuracy. Is being developed. Further, in the case where the processing cylinder is provided side by side, the amount of the second reduction product reduced to the processing cylinder determines whether the threshing process is good or bad. Therefore, in a thresher equipped with a processing cylinder, it is desirable to change the fin sensitivity according to the second reduction amount.

However, when the fin angle is automatically adjusted according to the amount of the second reduced product, the shape, size, etc. may vary depending on the conditions of threshing, that is, the type of grain, the type of grain, and the like. Since the water content differs depending on the growth condition, field conditions, etc., uniform automatic adjustment is not appropriate.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is possible to automatically adjust the fin angle based on the threshing processing amount. An object of the present invention is to provide a threshing device that can improve and at the same time control the fin angle according to the type of grain and set a lower limit value to avoid an abnormal state.

[0006]

DISCLOSURE OF THE INVENTION The present invention is a threshing device for selecting grains threshed by a handling cylinder with a chaff sieve whose fin angle can be changed. There is no automatic adjustment. At the start of automatic adjustment, the fin angle is set according to the type of grain.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings showing its embodiments. FIG. 1 is an external perspective view of a harvester equipped with a threshing device according to the present invention. In the figure, 3 is a threshing device mounted on the upper part of the machine above the steering crawler 1, and is a reaper that is located at the front of the machine and is composed of a weeding rod 4, a cutting blade 2, a raising device 7, and the like. The grain culms harvested by K are supplied to the threshing device 3 through an upper and lower transporting device (not shown) and the like for threshing treatment, and the grain after threshing is fed to the paddy tank 5.

Further, in the figure, 9 is an operation column provided in front of the driver's seat 8, 10 is a vertical conveying device, and its end is made to face the starting end portion of the feed chain 12 of the grain-cutting and shifting device. A grain culm sensor 6 for detecting the feeding of the grain culm to the threshing device is provided in the vicinity of this. Note that the grain culm sensor 6 is not limited to this position, and may be on the side of the starting end of the grain culm sacking transfer device 11 or in a transport path such as the vertical transport device 10, and a harvester equipped with a handling depth automatic adjusting device. The machine may be configured to be shared with a sensor provided for detecting the culm length. The grain culm removal transfer device 11 is composed of a feed chain 12 and a separation rod 13, and the thresher 3
It is provided along the mouth of the.

FIG. 2 is a partially cutaway vertical sectional view of the threshing device 3. The threshing device 3 is a handling room 1 formed in the upper part of the machine casing 14.
5, a handling cylinder 17 having a large number of handling teeth 16, 16 ... Is mounted on the shaft 5, and a handling port is provided in parallel with the axial direction of the handling cylinder 17, and at the lower part of the handling chamber 15. A receiving net 18 is stretched, and a swing selecting device 19 substantially parallel to the axial direction of the handling cylinder 17 is provided below the handling chamber 15. Further handle 1
A processing chamber 50 for reprocessing the second reduced product is provided at a position on the upper right side (closer to the center of the machine body) of 7, and the axial direction of the processing chamber 50 is set in the processing chamber 50. A processing cylinder 51 having a large number of handle teeth 52, 52, ... Is axially mounted in the same direction as the long direction.

The rocking / sorting device 19 includes a rocking / sorting disc 20 extending in an inclined shape, a variable angle type chaff sheave 21 provided below the rear part of the swing / sorting disc 20 and a rear side of the chaff sheave 21. The stroller 22 is provided so as to swing in the axial direction of the handling cylinder 17 by a swinging arm 23.24 swinging in conjunction with a drive source.

Below the rocking / sorting device 19, the first grain extraction section (first port) 27 consisting of the first grain 25 and the screw 26, the second grain 28 and the second screw.
A sorting air passage 31 having a second grain extracting portion (second opening) 30 composed of 29 is formed.

The grain dropped to the first grain extraction section 27 is fed from the first screw 26 to the paddy tank 5, and the grain dropped to the second grain extraction section 30 is fed from the second screw 29 to the blower 47. It is blown up into the inside of the number-thrower cylinder 48, and is dropped from the processing drum cover 53 projecting above the processing chamber 50 of the roof plate of the threshing device 3 onto the processing drum 51 for re-sorting. . The second screw 29 is provided with a second rotation sensor 69 for detecting the number of revolutions of the screw 29, and the processing cylinder cover 53 is a second sensor for detecting the amount of the second reduction product reduced to the processing cylinder. 60
Is provided.

A grain sheave 32 is provided in the air passage 31 below the chaff sheave 21, and a Karako device 33 is provided on the blast side of the air passage 31. Then, after the airflow from the Karato device 33 is rectified by the rectification plates 34 and 35, it passes through the air passage 31 and the dust outlet (the third port) at the rear of the machine body.
It is configured so that the air is exhausted from 36 to the outside of the machine.

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

Above the upper suction cover 38, a downflow gutter, that is, a fourth gutter 43 is extended obliquely upward from both ends to form a fourth opening 44, and a thresher after threshing, that is, a stab taken out from straw. It is configured to reduce the grains above the straw bags 22.

FIG. 3 is a side sectional view around the fin angle changing operation lever shown together with a part of the chaff sheave. In the chaff sheave 21, a large number of fins 21b extending in the left-right direction of the body are juxtaposed in the front-rear direction between left and right frame members (not shown) extending in the front-rear direction of the body, out of the frame material framed in a rectangular shape, and each upper part is framed. It is pivotally supported by the material. The lower part of each fin 21b is pivotally supported by one adjusting connecting rod 21c extending in the front-rear direction,
The middle part of the rotary shaft 21d is fixed to the front portion of the adjusting connecting rod 21c. The rotating shaft 21d is pivotally supported at a position above the adjusting connecting rod 21c, and the tension spring 21 is provided above the rotating shaft 21d.
The front end of e is locked. The other end of the tension spring 21e is locked at an appropriate position in the threshing chamber. 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 the base end of an operating lever 71 provided on the front surface of the threshing device 3 on the side of the driver's seat 8.

Therefore, when the push-pull wire 21f is pulled, the lower portion of the rotary rod 21d is pivoted rearward, the adjusting rod 21c is moved rearward, and the fin 21b is erected and the fin angle (final connecting with the fin 21b). Angle formed with the 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 adjustment connecting rod 21c moves forward, the fin 21b tilts, and the fin angle γ becomes small,
The gap between the fins 21b becomes smaller.

The operating lever 71 is provided on the right side of the front surface 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 threshing device 3 on the side of the operation lever 71, and on the rear surface of the operation panel 70, a frame 77 having a U-shape in a plan view whose front part is open is attached. An operation lever 71 is pivotally supported on the side surface of the frame 77. A front portion of the operation lever 71 penetrates through a long hole formed in the operation panel 70 and projects forward, and a lower portion of a rectangular rotating piece 72 is fixed to a base end portion of the operation lever 71. Push-pull wire 21f
One end of is locked.

A rotary shaft 75 is vertically mounted on the 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 an appropriate intermediate portion. The lower end of the rotary shaft 75 projects downward from the frame 77, and this projecting portion 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 rotary shaft 75 by the worm gear so that the feed member 76 rotates.

The above-mentioned operation lever 71 is pressed and urged against the rotary shaft 75 by an appropriate method (not shown), and the feed member 7
It is adapted to be engaged between six spirals.

Therefore, the motor 73 is driven and the feed member 7 is driven.
When 6 rotates, the operation lever 71 is sent to the spiral of the feed member 76 and moves in the vertical direction, and the operation lever 71 can be manually operated by disengaging 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 manually or by the reverse rotation (or forward rotation) of the motor 73, the push-pull wire 21f is pulled (or pressed) and the fin 21b.
Rises (or tilts), and the gap between the fins becomes large (or small). A lever position detection sensor 78 using a potentiometer is provided at the proximal end pivot portion of the operation lever 71, and a voltage corresponding to the rotational position of the operation lever 71,
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, which includes a CPU 81 and a RAM 8
2, ROM 83, input interface 84, output interface 85.

At the input port a ₀ of the input interface 34, the output of a vehicle speed sensor 58, which is provided at the base end of a vehicle speed lever for changing the machine speed and uses a potentiometer that outputs a potential according to the amount of rotation, is A / D converter 5
It is digitally converted and input at 9, and the vehicle speed is discriminated from the output of the A / D converter 59 into three stages of high speed, medium speed and low speed.

The detection signal of the second sensor 60 is input to the input port a ₁ of the input interface 84 by the A / D converter 6
At 1, the signal is converted into a digital signal and input. The input port a ₂ is provided at the proximal end of the fin lever 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.

A threshing switch 63 which is turned on when the threshing clutch is engaged is connected to the input port a ₂ , and when the threshing switch 63 is turned on, the input port a ₃ becomes high level.

A reaping switch 64 which is turned on when the reaping clutch is in the engaged state is connected to the input port a ₄ , and when the reaping switch 64 is turned on, the input port a ₄ becomes high level.

The input port a ₅ has an automatic switch 6 which is turned on when the chaff sheave fin angle should be automatically adjusted.
5 is connected, and when the automatic switch 65 is turned on, the input port a ₅ becomes high level.

The input port a ₆ is connected to a grain selection switch 66 which is switched depending on whether the grain to be threshed is rice or wheat. In the case of wheat, the input port a ₆ is connected. ₆
The switch 66 is turned on so as to bring the signal to a high level.

The input / output port a ₇ is connected to a dry / wet changeover switch 67 which is switched depending on whether the grain to be threshed is a dry material or a wet material. The switch 67 is turned on so that a _{7 is set} to the 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 applied 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 to turn the second rotation sensor 69.
When the low rotation of the second screw 29 is detected and the output of the sensor 69 becomes high level, the switch circuit 68 is turned on and the input port a ₉ becomes high level. In addition, the switch circuit 68
Output is given to a light emitting diode (LED) 99 whose one end is body-grounded.

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

A switch circuit 87 is connected to the output port b ₂ , and when the switch circuit 87 is turned on, the light emitting diode 92 is turned on. The output port b ₂ outputs a high level signal when each sensor _or switch is not operating normally, and the light emitting diode 92 is turned on by the high level signal.

A switch circuit 88 is connected to the output port b ₃ , and when the switch circuit 88 is turned on, the automatic lamp 93 is turned on. The main port b ₃ is a chaff sheave 21
When the automatic switch 65 for automatic fin angle adjustment is turned on, a high level signal is output, and the high level signal turns on the automatic lamp 93.

A switch circuit 89 is connected to the output port b ₄ , and when the switch circuit 89 is turned on, the exciting coil 94C of the electromagnetic relay 94 is excited. This electromagnetic relay 9
4 has a normally-open contact 94a and a normally-closed contact 94b which are interlocked with each other.
The fin 21b of the motor is tilted and erected, and is interposed between one end of the operation lever 71 driving motor 73 (a terminal that becomes a high voltage when the motor 73 is rotated in the reverse direction), and the normally closed contact 94b is connected to the motor 73. It is interposed between the same terminal and the body ground. The output port b ₄ outputs a high level signal when the fin 21b of the chaff sheave 21 is tilted (when the fin angle is reduced).

A switch circuit 90 is connected to the output port b ₅ , and when the switch circuit 90 is turned on, the exciting coil 95c of the electromagnetic relay 95 is excited. This electromagnetic relay 9
Reference numeral 5 has a normally-open contact 95a and a normally-closed contact 95b which are interlocked with each other. The normally-open contact 95a is the other end of the power supply line and the motor 73 (a terminal which becomes a high voltage when the motor 73 is normally rotated).
, And the normally closed contact 94b is interposed between the same terminal of the motor 73 and the body ground.
The output port b ₅ outputs a high level signal when the fin 21b of the chaff sheave 21 is raised (when the fin angle is increased).

Therefore, when the output port b ₄ becomes high level, the exciting coil 94c of the electromagnetic relay 94 is excited, the normally open contact 94a of the electromagnetic coil 94 is closed, and the motor 73 is rotated in the reverse direction.
When b ₅ becomes high level, the exciting coil 95 of the electromagnetic relay 95
c is excited, its normally open contact 95a is closed, and the motor 7
3 is driven in the normal direction.

A switch circuit 96 is connected to the output port b ₆ , and the alarm buzzer 97 and the light emitting diode 98 are turned on when 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 disengage the feed member 76, and the lever 71 is rotated.
The push-pull wire 21f is pulled or pressed, the fin 21b is erected or tilted, and the fin angle is increased or decreased.

When the machine is run in such a state and the harvesting and threshing operations are performed, the grain culms cut by the reaping section K are sent to the grain culm cutting transfer device 11 of the threshing device 3. The grain culm, which has been inherited by the grain culm removal transfer device 11, has its ears inserted into the handling chamber 15 from the handling opening of the threshing device 3, and the handling teeth 16, 16, ... The threshing process is performed by the threshing process, and the grated products such as the threshed grains are the nets 18
Through which the specific gravity is sorted by swinging the device 19 and passing through the gap between the fins 21b, 21b ... Fell to the first take-out section 27, and the second reduced product and the third reduced product were struck by the karako device 33 with the wind blown by the straw rack 22.
It is blown up, hits the prevention cloth 42, falls on the straw rack 22, and is re-sorted while being loosened by the rocking action of the straw rack 22.
The second reduced product such as bud shoot particles fall to the second extraction section 30,
The No. 2 screw 29 blows up by the blower 47 into the No. 2 thrower cylinder 48 and is re-sorted by the processing cylinder 51. Larger straw debris and the like are transferred rearward while being interfered by the prevention sheet 42 by the wind sent from the Karato device 22 and discharged to the outside through the dust outlet 36, while relatively lightweight impurities are absorbed and discharged. It is sucked from the suction port 40 of the dust device 37 and discharged to the outside of the machine from the air exhaust port 41.

Next, the automatic adjustment of the fin angle of 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 mowing flag K indicating that the mowing operation is in progress, and the mowing start flag D indicating that the mowing is starting are all reset (D = 0), and each condition is set corresponding to the grain to be threshed.

FIG. 6 is a flow chart of the condition setting control. In the condition setting control, first, it is determined by the state of the grain selection switch 66 whether the grain to be threshed is rice or wheat. 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 value α of the appropriate range of the second reduction product amount, and the value βi in rice is set as the lower limit value β. To do. Then, the value Li in 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 fins 21b of the chaff sheave 21.

Next, the rice to be threshed is the dry / wet changeover switch 6.
It is determined whether it is a dry material or a wet material depending on the state of No. 7, and when the dry / wet changeover switch 67 is turned on, the lower limit value (minimum value) S of the control range at the time of automatically adjusting the angle of the fins 21b is determined. As a value, the wet material value Sis for rice is set, and when the dry / wet changeover switch 67 is turned off, the dry material value Sik for 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 set value M of the fin angle, Mih is set for medium speed, and Mit is set for low speed.

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

Next, the lower limit value S of the fin angle control range during automatic adjustment is set depending on whether the wheat to be threshed is a dry material or a wet material. That is, dry / wet changeover switch 6
When the dry material is turned off, the value Smk of the dry material in wheat is set as the lower limit value S, and when the dry / wet changeover switch 67 is turned on, the value Sms of the wet material in wheat is set. .

The reason for setting the upper and lower limits of the fin angle in this way is as follows. That is, the basis of the fin angle control is to set the amount of the second reduced product to be not lower than the lower limit values α and β determined by the grain, but depending on the situation or the malfunction of the control system, The control based on the detection result of the number of reduced products may result in an excessively small or excessively small fin angle that can only be considered abnormal. By avoiding such a situation, it is possible to prevent defective selection or clogging.

Further, the set value of the fin angle M set at the start of automatic adjustment is changed according to the set vehicle speed. That is, when the speed is high, the low-speed value Mit for rice is set, when the speed is medium, the wheat value Mmh is set, and when the speed is low, the low-speed value Mmt for wheat is set. To do.

As described above, the respective set values are different depending on the rice and wheat, and the dry material and the wet material, and the relationship between the upper and lower limit set values αm and βm of the proper range of the amount of the second reduced product in the rice is α and α, respectively.
i <αm and βi <βm.

In the case of wheat, culm breakage is more likely to occur than in the case of rice, and the upper and lower limits of the proper range of the amount of second reduced product are made larger than those of rice to increase the amount of second reduced product. This is because it is necessary, and by setting like this,
The amount of reduction products to the chaff sheave 21 is increased to reduce the mixing of culm into the first product to improve the sorting accuracy.

Further, the upper and lower limit set values for the control range of the fin angle during automatic adjustment are made different in the case of rice and the case of wheat, and the set lower limit is also made different depending on rice, wheat and its dryness. However, the upper limit setting value is Li
> Lm and the lower limit set value is Sis>Sik>Sms> Smk. This is because the chaff sheaves of rice are less leaky than wheat, and the wet materials are less leaky than dry materials.Therefore, if the fin angle becomes smaller, dust may accumulate on the chaff sheaves 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 beginning of cutting is different between rice and wheat, and this set value is different depending on the vehicle speed. The values are larger than those in the case of wheat and the values of low speed, respectively, and Mik>Mih>Mit>Mmh> Mmt. In the case of wheat, it is necessary to increase the amount of the second reduction product because there are many culms, and in the case of rice, the leakability is poor, so the set fin angle at the start of automatic adjustment in rice is set. It is necessary to improve the leakability by making the value larger than that of wheat to reduce the sorting accuracy.In addition, when the vehicle speed is high, the grain flow rate increases and the amount of secondary reducing products also increases. On the contrary, when the speed is low, the grain flow rate decreases and the amount of the second reduction product also decreases.Therefore, the set fin angle at the start of automatic adjustment at high speed is set to low at the start of automatic adjustment at low speed. This is because it is necessary to make it larger than that at the time and reduce the sorting accuracy so that the amount of the second reduced product does not become too large.

After setting the conditions as described above, the control device 80 determines whether or not the cutting operation is started by the cutting start flag D, and if the cutting start flag D is in the reset state (D = 0). Assuming that the reaping work has not started yet,
The stored value P of the fin angle is stored as the fin setting angle M at the start of cutting.

When the automatic switch 65 is turned on to automatically adjust the fin angle in this state, and the threshing switch 63 is turned on with the threshing clutch engaged to drive the threshing device 3, the controller 80 first detects the fins. The motor 73 is continuously driven forward so that the angle becomes the lower limit value S, the fin angle is judged from the detection result p of the lever position detection sensor 78, and when the lower limit value S is reached, the drive of the motor 73 is stopped. To do.

When the machine is run in such a state and the mowing work and the threshing work are started, the cut 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. When the reaping clutch is engaged, that is, when the reaping switch 64 is turned 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 the reverse direction so that the set angle M is set at the start of cutting. And the lever position detection sensor 7
When it is detected by the detection value p of 8 that the fin angle has reached the set angle M, the drive of the motor 73 is stopped, and the cutting flag K indicating that the cutting operation is started is set (K = 1). .

This is because, at the start of the normal threshing operation, the threshing amount is not constant and the amount of the second reduced product is unstable, and the detection result of the second sensor 60 is extremely unstable. If the fin angle is automatically adjusted based on the above, the sorting accuracy is significantly reduced. Therefore, after the grain culms are conveyed, the predetermined time T ₁ is the lowest state S of the control range in the automatic adjustment of the fin angle, that is, the most. Selection is performed in a state where the selection accuracy is high, and the fin angle is immediately set to the set angle M after a predetermined time T ₁ when the threshing amount is stable, and after this state, the fin angle is centered around the state of the fin angle M. The above control is performed by intermittently driving the fin 21b corresponding to the amount of the second reduced product based on the detection result of the second sensor 60.

On the other hand, the automatic switch 65 and the threshing switch 6
In a non-working state in which any of the 3 is turned off or in a fin angle manual adjustment state, the automatic lamp 93 is in a non-lighting state, and in a working state in which both switches 65 and 63 are turned on, when the grain culm sensor 6 does not detect the conveyed grain culm. Automatically blinks the automatic lamp 93 and continuously drives the motor 73 to set the fin angle to the lower limit S for automatic adjustment.
b is set to the most inclined state of high sorting accuracy so that the grain culms may be transported.

Next, control of the fin angle based on the amount of the second reduced product captured by the second sensor 60 will be described with reference to the flowchart of FIG. First, the alarm counter BZ is used to check whether or not the buzzer 97 has already sounded.
Is in the reset state (BZ = 0) and the buzzer 97 has not been 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 reduction product captured by the second sensor 60 is equal to or higher than the upper limit value α (or lower limit value β) at which the chaff sheave 21 can perform proper selection, the fin angle falls within the control range during automatic adjustment. Whether the upper limit value L or more (or the lower limit value S or less) is determined from the detection value p of the lever position detection sensor 78, and the upper limit value L (or the lower limit value S) is not obtained (1) (hereinafter 7 and 8 are given the same reference numerals), the motor 73 is reversely rotated (or forwardly rotated) 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 that pass through the gap, and decrease (or increase) the amount of grain to the second extracting unit 30 (2). . When such control is performed, the mowing start flag D is in the set state (D = 1),
The alarm counter BZ is reset (BZ = 0). If the amount of second reduction product does not fall within the predetermined range (α to β) due to the change Δp of the fin angle due to the short-time driving of the motor 73, the motor 73 is driven again for a short time and the fin angle is again changed to Δp. However, the motor 73 is intermittently driven until the second reduced product falls within the predetermined range.

In this case, when the motor 73 is driven for a predetermined time, the fin angle changes by Δp. If the second reduction amount is within the 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 drive of the motor 73, the fin angle does not match the expected fin angle (P + Δp or P-Δp) from the motor drive, or the fin angle is not changed even though the fin angle is not changed. If it is changing (3), the predetermined manual holding control shown in FIG. 8 is performed assuming that the fin angle is changed by manually operating the operation lever 71.

FIG. 8 is a flowchart of the manual holding control. When it is determined that the operation lever 71 has been manually operated, the operation amount is first determined by the lever position detection sensor 7.
Judging from the detection value p of 8, it is checked whether or not the fin angle exceeds the fin angle control range (S to L) during automatic adjustment (4,5). Then, when 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 maintained for a predetermined time T ₄ in order to prioritize the manually operated state (6). After that, the cutting start flag D is set (D = 1) and the alarm counter BZ is reset (BZ = 0) (see FIG. 7) to restart the automatic adjustment based on the amount of the second reduced product.

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 the operation of the operation lever 71, the predetermined manual operation state is given priority. At the time T _5, the state of the manually operated fin angle is maintained (7), and thereafter, the motor 73 is reversely rotated (or forwardly rotated) for a short predetermined time to increase (or decrease) the fin angle. If the fin angle is not within the predetermined range even after the motor 73 is driven, 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 (S to L) in the automatic adjustment, in such a state, the cutting start flag D is set (D = 1) and the alarm counter BZ is reset (BZ = 0) (8), second reduction In quantity Resume the automatic adjustment that brute.

In the predetermined time T _{5 in} this case, the change of the fin angle by the above-mentioned manual operation is within the control range of the automatic adjustment (S ~
It is set to be longer than the predetermined time T ₄ when it is L). Depending on the case, T ₄ = T ₅ or T ₄ > T
_May be ₅ .

With such a configuration, when the amount of cut culms and the amount of the second reduction product are temporarily changed, the manual operation is prioritized and the state is maintained for a predetermined time. It is intended to improve workability by coping with the temporary change and then returning to the automatic adjustment based on the amount of the second reduced product.

When the fin angle is out of the control range of the automatic adjustment by the manual operation, the fin angle is set within the control range of the automatic adjustment after a predetermined time elapses, and then the fin angle is automatically returned to the automatic adjustment. Prevents runaway when resuming adjustment.

On the other hand, the amount of the second reduced product is within the proper range (α ~
If the second reduction amount does not fall within the proper range (α to β) due to intermittent driving of the motor 73 by automatic adjustment instead of β), the motor 73 has a fin angle that is the upper or lower value L (or the lower limit value S) of the control range. ) Is intermittently driven (see FIG. 7, FIG. 7). When the fin angle becomes the upper limit value L (or the lower limit value S) of the control range and the sorting accuracy becomes the lowest (or the highest) in the automatic adjustment, the alarm counter BZ indicates the upper limit (or the lower limit) of the fin angle. Measures the duration of, and advances the count content by "1" at regular intervals (10). The chaff sheave 21 performs the selection in such a state, but within the predetermined time until the count content of the alarm counter BZ reaches T ₂ , the amount of the second reduced product does not fall within the proper range, and the fin angle has an upper limit (or a lower limit). If the state continues for this predetermined time, the buzzer 97 is sounded and the light emitting diode 98 is turned on (11).

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

As described above, when the buzzer 97 sounds and the light emitting diode 98 lights up, the dry / wet changeover switch 67 is used.
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 grain changeover switch 66 is changed from the off state to the on state, that is, the rice. When the setting is changed to the wheat setting, or when the on-state is changed to the off-state, that is, the wheat setting is changed to the rice setting, the set value in the condition setting control described above is changed, and the upper and lower limit values of the appropriate range of the second reduction amount are changed. Since the upper and lower set values of the fin angle are changed, the ringing 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 reach the proper state even after the fin angle is changed, the buzzer 97 is sounded again and the light emitting diode 98 is turned on.

This is because if the dry / wet changeover switch 67 or the grain changeover switch 66 is not operated correctly, an appropriate alarm will be issued without proper sorting. In such a case, the alarm is once stopped, each setting condition is changed, and the alarm is reissued when the second reduction amount is not in the proper state even after that.

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 when the operating lever 71 is automatically adjusted in order to eliminate this abnormality immediately. The fin angle is set to a further low (or high) sorting accuracy by rotating the control range above the upper limit value L or above (or below the lower limit value S).

By this operation, the ringing of the buzzer 97 is stopped and the light emitting diode 98 is turned off (12),
Furthermore, the state of the fin angle that was manually operated is maintained, and the second reduction amount is promptly brought to an appropriate range. When the second reduction amount is within the proper range (α to β), the fin angle state manually operated is maintained for a predetermined time T ₆ (13), and then the motor 73 is turned on for a short predetermined time. When the fin angle is not within the control range (L to S) of automatic adjustment by rotating (or reversing) driving, decreasing (or increasing) the fin angle by a predetermined amount (14), and driving the motor 73 for such a short time. Then, the motor 73 is driven again for a short time, and eventually the motor 73 is intermittently driven until the fin angle falls within the control range (LS) of the automatic adjustment. And the fin angle is within the control range (L ~
When it becomes within S), the automatic adjustment control is restarted, and thereafter, the fin angle is intermittently driven corresponding to the amount of the second reduced product as described above.

During such an operation, the amount of the second material dropped into the second grain extracting portion 30 becomes large, and the second screw 2
When the second rotation sensor 69 detects that the number of revolutions of the chaff sheave 21 has dropped to a predetermined value or less due to overload, 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 reverse-rotated so that the fin angle becomes the upper limit value L of the control range in the automatic adjustment, and the amount of the grains passing between the fins 21b is increased, and the amount of the grains falling to the first grain extracting portion 27 is increased. Is increased to decrease the amount of the second material falling in the second grain extracting portion 30. In this case, the fin angle p at the time when the No. 2 screw 29 is overloaded is stored as the memory value P, and when the overload is eliminated, the fin angle is immediately set to the value P, and in such a state. Automatically adjust the fin angle.

At the end of the one-step cutting operation, the grain culm is not present, and the grain culm sensor 6 is turned off. However, at the end of the cutting operation, the amount of threshing is not constant, as at the start of the operation, Since the amount of the second reduced product is also unstable, if the fin angle is controlled based on the amount of the second reduced substance, the sorting accuracy is significantly reduced, and therefore automatic adjustment based on the amount of the second reduced substance is prohibited and the automatic lamp 93 is turned on. Then, the fin angle p at the time when the grain culm sensor 6 is turned off is stored as the stored value P, and the motor 73 is set so that the fin angle of the chaff sheave 21 becomes the lower limit value S of the control range of the automatic adjustment after a predetermined time T _3. By continuously driving, the fins are selected in the most tilted state, that is, the most accurate state. At this time, the reaping flag K is reset (K = 0). Then, when the mowing work of one stroke is completed, the turning to the next stroke is performed, and the mowing work is started again, the grain culm is detected by the sensor 6, and the chaff sheave 2 at the predetermined time T ₁ when the grain flow rate is small.
The grain selection by 1 is performed in a high selection accuracy state in which the fin angle is the lower limit value S, but after a predetermined time T _{1 has} elapsed,
The fin angle is used as the stored value at the end of the mowing, and in that state, the automatic start of the fin angle based on the amount of the second reduced product is restarted.

Therefore, even at the beginning of cutting in one stroke, the sorting is performed in the high sorting accuracy state at first, and after the elapse of a predetermined time, the final fin angle is obtained when the fin angle is automatically adjusted in the preceding stroke. The fin angle is continuously driven, and automatic adjustment is restarted in this state.

On the other hand, in the harvester having such a configuration, the fin angle automatic adjustment when the threshing work is performed by hand without performing the mowing work will be described.

When the automatic switch 65 is turned on to automatically adjust the fin angle and the threshing clutch is engaged and the threshing switch 63 is turned on, the fin angle of the chaff sheave 21 is small as in the harvesting operation described above. Therefore, the sorting accuracy is the highest. When the grain culm to be threshed is inserted into the handling chamber 15 in this state, the grain culm sensor 6 is turned on. In this case, since the manual threshing is performed, the mowing clutch is in the disengaged state, and the mowing switch 64 is in the off state. Therefore, the fin angle is automatically adjusted immediately without setting the fin angle to the standard state. Then, the automatic adjustment is started in the state of the fin angle with high sorting accuracy, 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 during the harvesting work described above, and the fins 21b are intermittently driven so that the amount of the second reduced product becomes a predetermined value.

In the above embodiment, the fin angle is automatically adjusted based on the amount of the second reduced product.
Instead of this, it may be configured to automatically adjust based on the first flow rate, the third flow rate, the grain culm supply amount, and the like.

[0077]

EFFECTS OF THE INVENTION According to the present invention, highly accurate sorting can be performed which can correspond to the types of grains such as rice and wheat, and can finely respond to the threshing amount. Further, while controlling according to the threshing processing amount, it is possible to reliably prevent an abnormal fin angle that cannot be considered for each type by setting the upper and lower limit values. Even if some kind of abnormality such as a defect occurs, excellent effects such as poor selection and clogging can be achieved.

[Brief description of drawings]

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

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

FIG. 3 is a side view of the main part of the chaff sheave and around the operation lever.

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

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]

 3 Threshing device 6 Grain culvert sensor 11 Grain culm-carrying transfer device 17 Handling barrel 21 Chaf sheave 21b Fin 27 First grain taking-out part 29 Second screw 30 Second grain taking-out part 50 Processing chamber 58 Processing body 58 Vehicle speed sensor 60 Second sensor 63 Threshing switch 64 Mowing switch 65 Automatic switch 66 Grain change switch 67 Dry / wet change 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 fin angle changing unit in a chaff sheave, a unit for detecting a threshing amount, a unit for specifying a type of grain to be threshed, and a fin based on the detected threshing amount and a designated type of grain. And a means for setting the upper and lower limits of the automatic adjustment range of the angle of the fins according to the designated type.