JPH0244679Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a threshing device for a harvester, a self-propelled threshing machine, etc.

[Prior art]

The threshing device threshes the harvested grain culm with a handling cylinder.
Fine grains are extracted by sorting with a swinging sorter. The oscillating sorting equipment includes a oscillating sorting board, a chaff sieve,
It consists of a stroke rack, etc., and the grains that have been sorted by specific gravity on a swinging sorter are further sorted by passing through the gaps between the fins of a chaff sheave.

Recently, a threshing device has been developed in which the inclination angle of the fins of the chaff sheave is changeable and the angle of the fins is changed automatically or manually in accordance with the grain flow rate and the like.

However, the condition of the chaff sheave in the threshing equipment cannot be seen by the operator, and especially when the fin angle is changed, the operator cannot check the condition of the fin angle during work. The operator was not sure whether the automatic adjustment was being made properly and was in a state of anxiety.

〔the purpose〕

The present invention was developed in view of the above circumstances, and its purpose is to easily check the state of the fin angle of the chaff sheave and to facilitate manual and automatic adjustment of the fin angle. The aim is to provide threshing equipment that can be used.

〔composition〕

The present invention allows the fin angle of the chaff sheave to be changed by the rotation of an operating lever, and has a spiral shape attached to one side of the operating lever that is detachable from the operating lever and extends in the rotating direction. A feeding member is provided, and by engaging the operating lever with the feeding member and rotating the feeding member, the operating lever rotates and the fin angle is changed.

〔Example〕

The present invention will be described below based on drawings showing embodiments thereof.

FIG. 1 is an external perspective view of a harvester equipped with a threshing device according to the present invention (hereinafter referred to as the present device).
In the figure, 3 is a threshing device mounted on the upper part of the machine body above the traveling crawler 1, and the reaping section K is located at the front part of the machine body and is composed of a dividing rod 4, a cutting blade 2, a pulling device 7, etc. The grain culms harvested by the threshing device 3 are sent to the threshing device 3 via upper and lower conveying devices (not shown), where they are threshed, and the threshed grains are sent to the paddy tank 5.

In the figure, 9 is an operation column installed in front of the driver's seat 8, and 10 is a vertical conveyance device, the end of which faces the starting end of the feed chain 12 of the grain culm transfer device 11. A conveyance sensor 6 is provided nearby to detect the feeding of grain culms to the threshing device. The grain culm conveying device 11 is composed of a feed chain 12 and a peg 13, and is provided along the handling opening of the threshing device 3.

FIG. 2 is a partially cutaway vertical sectional view of the threshing device 3. The threshing device 3 has a handling barrel 17 having a large number of handling teeth 16, 16... mounted on a shaft in a handling chamber 15 formed in the upper part of the machine casing 14, and a handling opening parallel to the axial direction of the handling barrel 17. At the same time, a receiving net 18 is stretched in the lower part of the handling chamber 15, and furthermore, a swinging sorting device 1 is installed in the lower part of the handling chamber 15, which is substantially parallel to the axial length direction of the handling cylinder 17.
9. Furthermore, a processing chamber 50, which is a re-threshing device for re-threshing the second reduced material, is provided at the upper right side of the handling barrel 17 (near the center of the machine). A processing cylinder 51 having a large number of handling teeth 52, 52, .

The oscillating sorting device 19 includes an oscillating sorting board 20 extending in an inclined manner, an angle-variable chaff sheave 21 (to be described later) provided at the lower rear of the oscillating sorting board 20, and a stroke rack connected to the rear of the chaf sheave 21. 2
The handling cylinder 1 is constructed by swing arms 23 and 24 that swing in conjunction with a drive source.
7 in the axial direction.

Further, below the swinging sorting device 19, there is a first grain board 2.
5 and the first grain take-out part (first mouth) 27 consisting of the first screw 26, and the second grain take-out part (second mouth) consisting of the second grain plate 28 and the second screw 29.
30 is formed.

The grains that have fallen into the first grain take-out section 27 are fed from the first screw 26 to the paddy tank 5, and the grains that have fallen into the second grain take-out section 30 are sent from the second screw 29 to the second throat tube by the blower 47. 48 and is blown up into the roof plate of the threshing device 3 and dropped onto the processing cylinder 51 from a processing cylinder cover 53 protruding above the processing chamber 50 for re-threshing. Note that a second sensor 60, which will be described later, is provided inside the processing cylinder cover 53.

A grain sheave 32 is provided below the chaff sheave 21 in the air passage 31.
A winnowing device 33 is provided on the wind raising side. Then, the airflow from this Karakino device 33 flows through the rectifier plates 34, 35
After the air is rectified by the airflow path 31, the air is discharged to the outside of the machine from a dust exhaust port (third port) 36 at the rear of the machine.

A dust suction/exhaust device 37 using an axial fan is provided at the rear and upper part of the stroke rack 22;
An upper suction cover 38 is placed above the dust suction/exhaust device 37.
In addition, a lower suction cover 39 is provided below, and the suction port 40 of the dust suction/exhaust device 37 is connected to the air path 3.
It is opened on the first side, and its air exhaust port 41 is opened toward the dust exhaust port 36.

Above the upper suction cover 38, a fourth gutter 43 is provided which extends diagonally upward from both ends to form a fourth gutter 44, which collects the prickly grains taken out from the culm after threshing, that is, from the waste straw. The stroke rack 22 is configured to be returned upward.

FIG. 3 is a plan view of the fin angle changing operation panel of the present device, and FIG. 4 is a partially cutaway perspective view from the front left side of the angle-variable chaf sheave 21 shown together with a side sectional view taken along the - line. . Of the rectangular frame members, the chaff sheave 21 is located between the left and right long frame members 21 and 21r extending in the longitudinal direction of the aircraft.
A large number of fins 21b, 21b... extending in the left-right direction of the fuselage body are bent forward with the lower side at a substantially right angle, and a rotation shaft 2 is fixed to both ends of each bent part.
1c, 21c... are rotatably supported by long frame members 21, 21r on both sides. The left end portion of the shaft portion 21c of each fin 21b projects through the left long frame member 21 to the left side. A connecting arm 21d is provided on the left side of the left long frame member 21 in parallel with the long frame member 21, and the lower side of the connecting arm 21d protrudes to the left of the position where the connecting arm 21d is installed. The upper ends of the connecting pieces 21h, 21h, etc., which are fixed to the left end portions of the rotation shafts 21c, 21c, are rotatably attached.

The rear end of the connecting arm 21d is connected to the left long frame member 2.
The front end of the tension spring 21g is connected to the rear end of the tension spring 21g. The front end of the connecting arm 21d is inserted from the opening side of the connecting member 21f, which is U-shaped in plan view, and is pivotally supported.
One end of an inner wire 72a of the push-pull wire 72 is fixed to the other curved portion.

At a position slightly forward of the tip of the connecting arm 21d of the left long frame member 21, there is an L-shaped push-pull wire support member 21i in plan view, with one piece thereof protruding in a direction perpendicular to the left long frame member 21. The outer wire 72b of the push-pull wire 72 is fixed to the projecting piece of the support member 21i.
One end is fixed.

At a position slightly closer to the front than the tip of the connecting arm 21d of the left long frame member 21, there is an L-shaped push-pull wire support member 21i in plan view, with one piece thereof protruding in a direction perpendicular to the long frame member 21. One end of the outer wire 72b of the push-pull wire 72 is fixed to the projecting piece of the support member 21i.

The fin angle operation panel 70 is provided on the side of the driver's seat 8 (see Fig. 1; when the automatic changeover switch 80 is set to the manual side, the fin angle can be changed and adjusted by the operation lever 71. When the automatic changeover switch 80 is set to the automatic side, automatic adjustment can be performed by a control circuit (see FIG. 7), which will be described later.

A U-shaped frame 77 is fixed to the inside of the outer panel of the fuselage on the left side of the driver's seat, with its opening direction facing upward and its longitudinal direction facing forward and backward of the fuselage. A panel 79 is attached to the outer part of the body outer panel to which the frame 77 is attached, and a long hole is formed along the longitudinal direction of the opening of the frame 77.

The surface of the panel 79 has a long hole in between, and the threshing speed when harvesting wheat is displayed on the left side of the machine, and the threshing speed when harvesting rice is set on the right side, from the front of the machine: "low speed", "standard", and "high speed". The "standard" position of wheat corresponds to the "low speed" position of rice, and the "high speed" position of wheat corresponds to the "standard" position of rice. When adjusting the angle, it is possible to adjust the threshing speed depending on the cutting speed, field conditions, crop growth conditions, etc.

A rotating shaft 75 is mounted on a portion near the upper end of the frame 77 along its longitudinal direction, and a spiral feeding member 76 is integrally attached to the rotating shaft 75 at both ends and at appropriate intermediate portions. is fixed to. The rear end of the rotating shaft 75 projects outward from the frame 77, and a gearbox 74 is provided on this projecting part. The output shaft of a motor 73 is connected to the gearbox 74, which is fixed to the outside of the rear end of the frame 77 with the output shaft facing upward, and the driving force of the motor 73 is transmitted to the rotating shaft 75 by a worm gear. , thereby causing the feeding member 76 to rotate.

At the bottom of the frame 77, the base end of an approximately "he"-shaped operating lever 71 is pivoted so as to be rotatable in the front and back directions while allowing some movement in the left and right directions, and the tip end thereof protrudes from the elongated hole in panel 79. Further, the operating lever 71 is pressed toward the rotating shaft 75 by an appropriate method (not shown), and is engaged and locked between the spirals of the feeding member 76. Furthermore, the inner wire 72 of the push-pull wire 72 is located near the base end of the operating lever 71.
The other end of the outer wire 72b is attached to the front end of the frame 77.

In addition, 84 in the figure is a warning light for detecting and displaying a clogging by a second sensor 60, which will be described later, when the flow path of the second reduced product is clogged. 86 again
When the fin angle is automatically adjusted by the automatic changeover switch 80, the output of the second sensor 60 can be switched to high or low speed depending on the cutting speed, field conditions, crop growth conditions, etc., as in the manual case, to make it more appropriate. This is a selection switch for performing proper threshing work.

Therefore, when the motor 73 is driven and the feeding member 76 rotates, the operating lever 71 is sent into the spiral of the feeding member 76 and rotates in the longitudinal direction of the machine, and the operating lever 71 is pushed to the left by the operator's hand. It is also possible to remove the engagement with the feed member 76 and manually rotate it. In this way, when the operating lever 71 is rotated manually or by forward (or reverse) rotation of the motor 73 in the direction shown by the solid line (or broken line) in FIG. 4, the inner wire 72a is pressed (or pulled). The connecting member 21f is the tension spring 2
The connecting arm 21d moves backward (or forward) with the help of (or against) a tensile force of 1 g, and connects the upper side of each connecting piece 21h, 21h... moves rearward (or forward), and each rotation shaft 21c, 21c... fixed to the lower side of each connection piece 21h, 21h... moves clockwise (or The fins 21b, 21b, . . . similarly rotate clockwise (or counterclockwise) and tilt (or stand up). The motor 73 is driven in forward and reverse directions based on the detection result of the second sensor 60, as will be described later.

FIG. 5 is a side view of the second sensor 60 provided in the processing cylinder cover 53, and FIG. 6 is an elevational view thereof.

The processing trunk cover 53 is formed in the shape of a substantially rectangular parallelepiped box whose longitudinal direction is the longitudinal direction of the machine body, and is attached to the roof plate of the threshing section 3 at a position above the processing chamber 50 with bolts and nuts.

A rotary potentiometer 61 is installed on the inside of the right side plate of the processing cylinder cover 53, with its detection axis oriented in the left-right direction of the machine, that is, perpendicular to the feeding direction of the second reductant. A rotating shaft 64 of a detection plate 62 is connected to the detection shaft via a joint 63, and the detection plate 62 is attached in a hanging state. The detection plate 62 is formed into a substantially trapezoidal shape in which the width direction dimension of the distal end portion is smaller than the width direction dimension of the proximal end portion, so that even if waste straw etc. gets wrapped around or entangled, other two It is in a form that can be easily removed by the frictional force of the reduced product.

In addition, on the top surface of the processing cylinder cover 53 that is slightly toward the rear of the machine (upstream in the flow direction of the second reductant) from the mounting position of the potentiometer 61, the width direction dimension is approximately equal to the inner width of the processing cylinder cover 53. Protective plate 67
The proximal end of is fixed. The intermediate portion of the protective plate 67 extends in the shape of a slope toward the detection plate 62, and the tip portion thereof is substantially parallel to the top surface of the processing cylinder cover 53. A tension spring 66 is stretched between approximately the center of the intermediate portion of the protection plate 67 and a position near the upper end rotation shaft 64 of the detection plate 62. Further, on the top surface of the tip of the protection plate 67, there is a position where the operating rod is pressed by the detection plate 62 and operates when the detection plate 62 is pulled slightly toward the rear of the aircraft body by the tension spring 66 compared to when the detection plate 62 hangs vertically. A limit switch 65 is provided at (the protection plate 67 is for protecting the tension spring 66, limit switch 65, etc. from the collision pressure of the second reduction product, etc.).

Therefore, when the second reduced product is blown up into the processing cylinder cover 53 by the blower 47, the detection plate 62 is rotated toward the front of the machine (in the direction of the solid line arrow in FIG. 5) due to the collision pressure of the second reduced product. The amount of movement, that is, the amount of second reduction is detected by the potentiometer 61. In addition, if the flow path of the second reduced product is clogged, the second reduced product will not be fed and the wind pressure will decrease. ), and the limit switch 65 is activated to detect this. ).

FIG. 7 is a circuit diagram of the control system of the present device. In the figure, 90 is a control device using a microcomputer, including an input/output interface 92, a CPU
Consists of 91, RAM93, ROM94, etc.
The input/output interface 92 has input ports _a1 to
a ₅ and output ports b ₁ to _{b 3} .

The output signal Vs of the potentiometer 61 of the second sensor 60 is given to the input port _a1 via the A/D converter 68.
In this embodiment, the input potential can be switched in three stages by the selection switch 83.
That is, a constant voltage is applied to the changeover switch 83, and this input voltage is applied to the potentiometer via one of the resistors R ₁ , R ₂ , and R ₃ each having a different resistance value by the selection switch 86 using a rotary switch. The resistance value of each resistor satisfies R ₁ <R ₂ <R ₃ . Therefore, the resistance R ₁
When power is supplied to potentiometer 61 through R2, compared to when power is supplied through resistor _R2 ,
The input potential to the potentiometer 61 becomes higher,
If the amount of secondary reduction is the same, its output potential will also be higher and will be applied to input port _a1 , making it possible to select three levels of output signal values for the same amount of secondary reduction. There is. The control device 90 outputs a high-level signal from the output port b ₁ or b ₂ so that the input value of the input port a ₁ is between a predetermined upper limit value Vh and lower limit value V, which will be described later. This is to adjust the fin angle.

A predetermined voltage Vcc (high level) is applied to each of the input ports a ₂ , a ₃ , a ₄ , and a ₅ , and when the limit switch 65 of the second sensor 60 is activated and its normally open contact 65a is closed, the input ports are closed. a ₂ becomes low level, and the conveyance sensor 6 detects the grain culm threshing device 3.
When the normally open contact 6a closes upon detecting the supply to the input port A3, the input port _A3 becomes low level, and when the automatic changeover switch 80 provided on the Finn angle operation panel 70 is turned on to the automatic side, the input port A3 becomes low level. ₄ becomes a low level, and when the threshing clutch is engaged, the threshing switch 85 is closed and the input port _a5 becomes a low level.

The positive electrode of the battery 81 is connected to one end of the key switch 82, and the negative electrode is grounded to the body. The other end of the key switch 82 is connected to the collector terminal of a switch transistor 83 via a warning light 84, the emitter terminal of the switch transistor 83 is grounded to the body, and its base terminal is connected to the output port _b3 .

The other end of the key switch 82 is connected to one end of a normally closed contact 97b of an electromagnetic relay 97 and one end of a coil 97c. The other end of the normally closed contact 97b is the normally open contact 9
It is connected to one end of the normally open contact 97a and one terminal of the motor 73, and the other end of the normally open contact 97a is grounded to the body. The other end of the coil 97c is connected to the collector terminal of a switch transistor 95 whose base terminal is connected to the output port _b1 and whose emitter terminal is body grounded.

The other end of the key switch 82 is also connected to one end of a normally closed contact 98b of an electromagnetic relay 98 and one end of a coil 98c. The other end of the normally closed contact 98b is connected to one end of the normally open contact 98a and the other terminal of the motor 73, and the other end of the normally open contact 98a is grounded to the body. The other end of the coil 98c is connected to the collector terminal of a switch transistor 96 whose base terminal is connected to the output port _b2 and whose emitter terminal is body grounded.

Both electromagnetic relays 97 and 98 have their coils 97
When c or 98c is energized, its normally open contact 97a
Or close 98a and at the same time close its normally closed contact 97b.
Or 98b is opened, and coil 97c is opened.
Or normally closed contact 98b or 97b which is closed when 98c is excited and its normally open contact 97a or 98a is closed and normally closed contact 97b or 98b is opened.
Normally open contact 97a (or 98a) closed from the side
A current flows through the motor 73 to drive the motor 73 forward (or reverse).

Therefore, when the output port b ₁ (or b ₂ ) becomes high level, the switch transistor 95 or 96 becomes conductive, the coil 97c or 98c is excited, and the motor 73 is driven in forward (or reverse) rotation.
Further, when the output port _b3 becomes high level, the switch transistor 83 becomes conductive, and the warning light 84 lights up.

Note that the power supply terminal _a0 of the control device 90 is connected to the other end of the key switch 82;
Power is supplied to the control device 90 by the closed circuit.

The operation of the present device configured as above will be explained below.

When adjusting the fin angle manually, set the automatic changeover switch 80 to the manual side, and manually push the operating lever 71 toward the left side of the machine to disengage it from the feed member 67. ) In the case of reaping, or when the grain growth condition is not very good (or good), etc., the direction indicated by "low speed" (or "high speed") on panel 79, that is, the solid line (or When the rotation operation is performed in the direction indicated by the arrow mark (broken line), the inner wire 72a is pushed (or pulled), the connecting arm 21d moves to the rear (or front) of the fuselage, and the rotation axis 21c of each fin 21b moves toward the fuselage. The fins 21b rotate clockwise (or counterclockwise) when viewed from the left side, and each fin 21b tilts (or stands up). As a result, the gap between each fin 21b becomes small (or large), the second reduction amount increases (or decreases), and the threshing process is performed at a lower speed (or higher speed).

When the automatic switch 80 is turned to the automatic side, the fin angle is automatically adjusted, and the processing contents of the control device 90 in this case will be explained below with reference to the flowchart of FIG. 8.

When a predetermined period of time has elapsed after the threshing switch 85 is turned on, it is determined whether the limit switch 65 is turned on or off, that is, whether or not the second grain removal section 30, the second thrower cylinder 48, etc. are clogged. If a blockage occurs, the limit switch 65 is activated and its normally open contact 65a is closed, so the input port _A4 becomes low level, and the control circuit 90 issues a high level signal from the output port _B3 to issue an alarm. The light 84 is turned on. In this case, threshing switch 85
When the warning light 84 is turned off, the warning light 84 is turned off.

Next, the state of the automatic changeover switch 80 is checked, and at this stage it is checked whether the automatic changeover switch 80 is turned to the automatic side.
Even in the case of manual control, it is possible to warn of clogging in the second order. When the automatic changeover switch 80 is turned to the automatic side, the input port _a4 becomes low level, so the control device 90 detects this and then resets the dead zone flag. When the harvesting operation is started, the reaping section K separates the grain culms using the dividing rods 4, raises them with the pulling device 7, and reaps them with the cutting blade 2. The grain is fed to the grain culm transfer device 11 of the threshing device 3 via the lower conveyance device and further the vertical conveyance device 10, and when this is detected by the conveyance sensor 6, its normally open contact 6
a is closed and input port _a3 becomes low level,
The control device 90 detects that the feeding of grain culms to the threshing device 3 has started.

When the feeding of the grain culm to the threshing section is started in this way, the control device 90 emits a high level signal from the output port b ₁ to close the coil 97c of the electromagnetic relay 97.
is energized to close the normally open contact 97a, and the normally closed contact 97
Open circuit b. As a result, the electromagnetic relay 97 is connected from the normally closed contact 98b of the electromagnetic relay 98 via the motor 73.
Since current flows through the normally open contact 97a of the motor 7
3 rotates in the normal direction, moves the operating lever 71 to the front limit of the fuselage (in the direction indicated by the solid line arrow in Fig. 4), tilts each fin 21b, 21b... to the maximum, and minimizes the gap between the fins. The state continues for a predetermined period of time.

After maintaining the gap between the fins to the minimum for this predetermined period of time, the conveyance sensor 6 is turned on and off again, that is, whether or not the grain culm is being fed to the threshing device 3 is checked, and the grain culm is fed. If not, that is, if the harvesting work is temporarily interrupted or finished, the fin gap is minimized again for a predetermined period of time, and then the process returns to the initial stage of automatic adjustment, that is, the stage of checking whether the threshing switch is on or off. . On the other hand, if the grain culm is still being fed to the threshing section, that is, if the harvesting work is continuing, the set state of the dead zone flag is checked, and if it is in the reset state, that is, the automatic adjustment is performed. Immediately after the start, the fin angle is adjusted by continuous driving of the motor 73, and when the dead zone flag is in the set state, that is, once the second reduction amount is adjusted to the appropriate amount, the fin angle is adjusted by the pulsed intermittent driving of the motor 73. The fin angle is adjusted.

That is, if the dead zone flag immediately after the start of automatic adjustment is in the reset state and the output Vs of the second sensor 60 is larger than the set upper limit value Vh (or smaller than the lower limit value V), the control device 90 ₂ (or b ₁ ) to continuously output a high level signal to the coil 98c or 97c of the electromagnetic relay 98 or 97.
is continuously excited. Therefore, the normally open contact 98a or 97a is continuously closed, so the electromagnetic relay 9
Current flows continuously from the closed normally closed contact 97b or 98b of the electromagnetic relay 98 or 98 through the motor 73, and the motor 73 continuously rotates in reverse or forward direction. Each fin 21b, 21b is driven to relatively quickly rotate the operating lever 71 toward the rear or front of the fuselage.
...is raised (or tilted) relatively quickly to increase (or decrease) the gap between the fins. As a result, the second reduction amount becomes small (or large) relatively quickly, and eventually when the value of the output signal Vs of the second sensor 60 falls between the set upper limit value Vh and the lower limit value V, the output port b ₂
The high level signal output from (or b ₁ ) is stopped.

In this way, the first adjustment of the fin angle after the start of automatic adjustment is performed, and after reaching the appropriate second reduction amount,
The dead zone flag is set, and then the states of the limit switch 65, automatic switch 80, threshing switch 85, conveyance sensor 6, etc. are checked, and if there is no change in each, normal adjustments are made thereafter.

That is, since the dead zone flag is in the set state, if the output of the second sensor 60 is larger than the set upper limit value Vh (or smaller than the lower limit value V),
After a delay of a predetermined time, the control device 90 outputs the output port b ₂
(or b ₁ ) intermittently outputs a high-level signal in the form of a pulse, and the coil 9 of the electromagnetic relay 98 or 97
8c or 97c is intermittently excited. Therefore, since the normally open contact 98a or 97a is intermittently closed, the normally open contact 97b or 98b of the electromagnetic relay 97 or 98 is connected to the normally open contact 98a or 98b of the electromagnetic relay 98 or 97 via the motor 73. 97a
Current flows intermittently to the motor 73.
is intermittently driven in reverse (or forward) to operate the operating lever 7.
1 is rotated relatively slowly toward the rear (or front) of the fuselage body, and each fin 21b, 21b, . . . is raised (or tilted) relatively slowly to increase (or decrease) the gap between the fins. As a result, the second reduction amount becomes small (or large) relatively slowly, and eventually when the value of the output signal Vs of the second sensor 60 falls between the set upper limit value Vh and the lower limit value V, the output port b ₂ (or b High level signal output from ₁ ) is stopped.

Thereafter, while the grain culm continues to be fed to the threshing device 3, that is, while the normally open contact 6a of the conveyance sensor 6 continues to be closed and the input port _a3 is at a low level, the pulse of the motor 73 is By intermittent driving of the fin angle, the fin angle is adjusted relatively slowly.

When the above-mentioned threshing operation is performed, the selection switch 86 is normally set to the standard position and power is supplied to the potentiometer 61 via the resistor R2, but the selection switch 86 may be set to the standard position and power is supplied to the potentiometer ₆₁ via the resistor R2. The amount of secondary reduction is less (or more) than the normal standard.
That is, if it is desired to perform the threshing process at high speed (or low speed), the selection switch 86 may be set to the high speed (or low speed) position. In this way, when the selection switch 86 is set to the high speed (or low speed) position, a higher potential (or lower potential) is applied to the potentiometer 61 than when it is at the standard position, and for the same amount of secondary reduction, Vs is It becomes a higher potential (or lower potential) and is applied to input port _a1 . However, since Vh and V are set constant, the gap between the fins is controlled to be large (or small), and the secondary reduction amount is smaller (or larger) than the standard, and the speed is increased (or lower). Then, threshing process will be carried out.
The threshing speed corresponds to high (or low) reaping or good (or not so good) growth conditions of the crop.

In the above embodiment, in order to maintain the secondary reduction amount at an appropriate level, the fin angle of the chaff sheave was changed according to the secondary reduction amount detected by the sensor. It is also possible to have a configuration in which the amount of secondary reduction is maintained at an appropriate amount by changing the traveling speed of Detect the amount with the second sensor,
Although the fin angle is adjusted according to this detection result, the present invention can also be applied to a structure in which the second reduced material is returned to a handling cylinder or a sorting device, and the present invention is similar to the above embodiment. Of course, similar effects can be achieved.

In addition, if a selection switch is provided near the driver's seat to change the output value of the sensor that detects the secondary reduction amount as in the above embodiment, it is possible to By selectively setting the fin angle of the chaff sheave, it becomes possible to easily maintain an appropriate secondary reduction amount according to the cutting speed, etc.

In addition, as in the above-mentioned embodiment, when automatic adjustment is started to maintain the second reduction amount at an appropriate amount after the return of the second reduction material to the re-threshing device is detected, the threshing process It becomes possible to prevent malfunction of automatic adjustment until the reduction of the second reduced product is started immediately after the start.

Further, as in the above embodiment, a sensor for detecting the second reduction amount is placed at a position downstream from the end of the second thrower cylinder in the flow path of the second reduction product, that is, in the processing cylinder which is a re-threshing device in the above embodiment. If the sensor is installed inside the processing cylinder cover that protrudes from the top, there is no risk of the sensor itself interfering with the flow of the second reduction product, and since the processing cylinder cover is removable, the sensor Maintenance and inspection are also easy.

Furthermore, as in the above-mentioned embodiment, the detection plate of the sensor for detecting the amount of secondary reduction, which rotates due to the collision pressure of the secondary reduction substance, has a widthwise dimension on the distal end side that is smaller than a widthwise dimension on the proximal end side. That is, in the case of a tapered shape, even if straw waste or the like gets wrapped around or entangled, it can be easily removed by the frictional force of other secondary reduction products, thereby making it possible to prevent malfunction of the sensor.

〔effect〕

According to the present invention, even when automatically adjusting the fin angle of the chaff sheave, the operating lever 71 is rotated to change the fin angle, so the fin angle can be confirmed by the rotating position of the operating lever 71, and the operator can You can know the control status and work with peace of mind. In addition, since the operation lever 71 can be easily disengaged from the feed member 76 and operated manually, emergency situations such as a blockage in the No. 2 screw etc. can be dealt with immediately. Even when automatic adjustment is not possible, it can be adjusted manually.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention.
The figure is an external perspective view of a harvester equipped with the proposed device, Figure 2 is a partially cutaway vertical sectional view of the proposed device, Figure 3 is a plan view of the Huynh angle operation panel, and Figure 4 is a side view of the Huynh angle operation panel. Perspective view of the chaff sheave shown with the figure, No. 5
The figure is a side view of the second sensor, and Figure 6 is its elevation view.
FIG. 7 is a circuit diagram of the control system of the present device, and FIG. 8 is a flowchart showing the control processing contents of the control device. 3... Threshing device, 17... Handling cylinder, 21... Chaff sheave, 21b, 21b... Finn, 30...
No. 2 reduced material removal part, 48... No. 2 thrower cylinder, 50
...processing chamber, 51...processing cylinder, 53...processing cylinder cover, 60...second sensor, 61...potentiometer, 62...detection plate, 65...limit switch, 70...fin angle operation plate , 71...operation lever, 73...motor, 76...feeding member, 90...
…Control device.

Claims (1)

[Scope of utility model registration request] A threshing device in which the fin angle of the chaff sheave can be changed includes an operating lever whose rotation changes the fin angle, and an operating lever that is provided on one side of the operating lever and is detachable from the operating lever so that the fin angle can be changed. A threshing device comprising: a spiral feeding member extending in the direction of movement; means for biasing an operating lever to engage the feeding member; and rotational driving means for the feeding member.