JPH0327166B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention provides a method for threshing in a threshing machine mounted on a combine harvester or in a threshing machine used independently, so as to properly maintain the degree of selection of grains to be threshed. The present invention relates to an operation control device for controlling the operation of a machine.

Conventional technology For example, Publication of Utility Model Publication No. 4116 of 1973, Publication of Japanese Patent Publication No. 1973-
As disclosed in Japanese Utility Model Publication No. 33494 and Japanese Utility Model Application Publication No. 52-146561, a movable sheave plate whose angle can be adjusted is provided on the chaff sheave in a swing sorting mechanism,
The angle of the movable sieve plate is manually or automatically changed and adjusted by estimating or visually checking the degree of threshing sorting, or by detecting the amount of grain culm supplied to the threshing machine using a sensor. Techniques are already well known that allow the amount of grain that escapes to be adjusted to obtain grains of a suitable degree of sorting.

Similarly, in order to enable control to maintain an appropriate degree of sorting, it is possible to install a dust valve with an adjustable angle to control the degree of dust removal from the handling room, or to control the number of rotations or adjust the air volume of the chimney. For example, a rotatable switching plate may be installed at the grain flow branching point for the first and second ports so that the grains falling at the same position can be adjusted between the first and second ports. It is also already known to be able to switch between the opening and the mouth and to change the swinging speed or frequency of the swinging sorting mechanism.

Problems to be Solved by the Invention However, since the above-mentioned adjustments were made individually in the conventional apparatus, there was a problem in that the sorting accuracy could not be sufficiently improved.

In other words, for example, the angle adjustment of the movable sieve plate of the chaff sheave should be done according to the variety of grain culm, dryness and humidity, grain flow rate, etc., and the air volume adjustment of the chiffon should be done according to the magnitude of the leakage flow rate of the chaff sheave. However, the two types of adjustments described above are closely related to each other in that the chaff sheave leakage flow rate changes instantly by adjusting the angle of the movable sheave plate. In addition, by adjusting the degree of dust removal from the handling chamber by adjusting the angle of the dust feed, the amount of threshed grain supplied to the chaff sieve changes instantly, and grains are switched between the first and second ports. The attitude adjustment of the switching plate guided by the valve should be made according to the ratio of the amount of leakage from the chaf sheave to the amount transferred to the rear of the chap sheave, whereas this flow rate ratio can be adjusted by adjusting the angle of the movable sheave of the chap sheave. Multiple adjustments, such as instantaneous fluctuations, are closely interconnected.

Despite this, in the past, each adjustment was individually performed manually or automatically, which caused problems in improving sorting accuracy. Even if they tried to do so, there would be no change in the fact that it would result in a delayed response due to the relationship with the above-mentioned immediate impact.
Another problem is that if the operator individually performs two or more types of adjustment operations, the operations become complicated and can easily lead to erroneous operations.

Therefore, the present invention aims to provide a new operation control device for a threshing machine that solves these problems and dramatically improves sorting accuracy.

Technical Means Taken to Solve the Problems In order to solve the problems of the present invention, the present invention provides a threshing machine with angle adjustment and rocking of the dust feed valve 15 that controls the degree of dust removal from the handling chamber 12. The angle adjustment of the movable sieve plate 81A of the chaff sieve 18 in the sorting mechanism, the air volume adjustment of the winnower 21, and the rotatable switching plate 90 provided at the branching point position of the shell grain flow with respect to the first opening 23 and the second opening 24. A single sensor 29, 29A that detects an index value related to the degree of sorting of grain threshing;
Technical measures have been taken, such as the provision of adjustment activation means 45 which can be activated automatically and simultaneously in response to output signals from the .

Operation According to the present invention, the adjustment actuating means 45 allows a plurality of mutually closely related adjustments to be performed simultaneously and automatically without any time delay between them. Furthermore, simultaneous and automatic regulation of multiple species is uniformly based on a single control criterion, such as an output signal from a single sensor 29, 29A that detects an index value related to the degree of threshing. This will be done to maintain an appropriate degree of selection.

The combination of adjustments to be made at the same time can be changed depending on the structure of the threshing machine itself and the crops to be threshed by the threshing machine, and as the number of types of adjustments increases, higher sorting accuracy can be ensured.

Embodiment FIG. 2 shows a combine equipped with a first embodiment of the invention.

The combine harvester moves the machine in the field by driving the left and right crawlers 1, and divides the grain stems to be planted in the field by using the weeding plate 2 at the forefront, and from the position of the weeding plate 2. The grain culm is raised by the grain culm lifting device 3 which is laid slightly backward and raised.
In addition, the planted grain culm is harvested at the base of the plant by the cutting blade 4 located behind the weeding board 2, and the harvested grain culm is harvested by the horizontal conveyance belt 5 and the vertical conveyance belts 6, 7 on the base side and the ear side. ,
The harvested grain culm is transported in the direction of the threshing section 8 on the machine body, and while the harvested grain culm is transported backward by the feed chain 9 along one side of the threshing section 8, the tip side of the harvested grain culm is transported into the threshing section 8. The structure is such that the grains are fed, threshed, and the threshed grains are received by the topsucker 10 on the other side of the machine after being sorted. The feed chain 9 is provided with an extension 9a extending rearward and upward, and the waste straw leaving the threshing section 8 is conveyed by the extension 9a.
The engine 11 constituting the driving source is mounted on one side of the aircraft at the rear.

FIG. 3 shows the structure of the threshing section 8.

As shown in the figure, inside the threshing section 8 and the handling room 12,
A handling barrel 13 is rotatably provided with its axis extending in the longitudinal direction of the aircraft, and the handling barrel 1 is driven to rotate by being transmitted from the engine 11 via an appropriate transmission mechanism.
3 separates the grain from the tip of the harvested grain culm and threshes it by means of a large number of handling teeth 14 installed thereon. Inside the handling chamber 12, there are also a plurality of dust feeding valves 15 which are supported so as to be adjustable near and far with respect to the handling barrel 13 by rotational displacement, and are dust feeding valves 15 which change and regulate the degree of dust removal from inside the handling chamber 12. A valve 15 is provided.

The threshing section 8 is also equipped with a crimp net 16 located below the above-mentioned handling drum 13, and this crimp net 16 collects grains and fine straw waste etc. from the threshed grains that are dropped onto the crimp net 16. Let it leak,
Unleaked material is discharged from the dust outlet at the rear end of the crimp net 16. From the bottom to the rear of the crimp net 16, there is a feed pan 17 from the front to the rear;
A swing sorting mechanism is provided which includes a chaff sheave 18, a grain sheave 19, and a stroke rack 20 arranged vertically in parallel, and a winnow 21 and a dust removal mechanism are installed at the front and rearmost positions in the lower part of the threshing section 8, respectively. A fan 22 is provided. The above-mentioned swing sorting mechanism 17-20 is made to swing back and forth and up and down, and the feed pan 1 at the forefront of the mechanism
As the crimp net 7 oscillates, it carries backward the leakage from the crimp net 16, and sorts out heavy grains downward and light straw waste etc. to the upper layer. Straw waste is further removed from the grains falling from the feed pan 17 to the chaff sieve 18 by the sorting air sent from the winnowing machine 21, and the above-mentioned grains are sorted again by passing through the chaff sieve 18. A finer grain sieve 19 leaks from the grain sieve 18, and is fed to the first mouth 23 in a carefully selected state by receiving the sorting wind from the winnower 21 during that time. Also, from feed pan 17 to karaki 21
From the straw that is moved onto the straw rack 20 with the help of the wind, as the straw rack 20 swings, mixed grains are separated in the front and direction and transferred onto the chaff sheave 18. At the same time, the ear pieces and some of the grains are separated to the lower layer and supplied to the lower second port 24 through the through holes of the straw rack 20. In the swinging sorting mechanism shown in FIG. 3, above the stroke rack 20 described above,
An upper stroke rack 25 is provided, and the upper stroke rack 25 is swung to assist the above-mentioned sorting action of the stroke rack 20 and to facilitate the discharge of straw waste. Due to the action of the straw rack 20 itself, the suction wind of the dust exhaust fan 22, and furthermore the sorting wind from the winnower 21, the straw waste leaving the stroke rack 20 is discharged toward the rear of the machine from the No. 3 dust exhaust port 26. Ru. The grains supplied to the first port 23 as described above are conveyed toward the other side of the machine by the first conveyor 27 in the first port 23, and are transferred to the top feeder 10 by a grain frying conveyor (not shown). It will be done. Further, the ear pieces and the like supplied to the second slot 24 as described above are returned to the handling chamber 12 by the second thrower 28 and are reprocessed within the handling chamber 12.

In order to detect the degree of threshing sorting in the threshing section 8, the following sorting degree detector is provided.

That is, in the illustrated case, this detector is configured as a grain loss detector 29 that detects the proportion of grains contained in the dust discharged from the third dust exhaust port 26, in other words, the amount of grain loss. As shown in FIG. 3, it is installed to hang down from the upper edge of the dust exhaust end of the third dust exhaust port 26 so as to be inclined rearward and downward. The grain loss detector 29 is equipped with a piezoelectric element such as a piezoelectric ceramic disk, and is configured to output a voltage spike or voltage pulse in response to pressure when it receives pressure. Therefore, when the dust discharged from the third dust exhaust port 26 hits the surface of the detector 29 and receives pressure, the grain loss detector 29
A voltage pulse with a frequency and amplitude corresponding to the pressure is output. Naturally, such voltage pulses will vary depending on whether grains hit the surface of the piezoelectric element or light straw waste, etc. as shown in _FIG .
Change the frequency like P ₂ .

In order to check the sorting state from the amount of lost grains discharged as waste, one part of the detector 29 is connected to the main body of the grain loss detector 29 as shown in FIGS. 4 and 5. A bandpass filter 30 constituting a section is provided. As shown in FIG. 4, this bandpass filter 30 filters only the voltage pulse P ₁ of a frequency corresponding to the grain,
The voltage pulse _P2 corresponding to straw waste etc. is cut off and not transmitted to the secondary side. As shown in FIG. 5, in contact with the bandpass filter 30, an amplifier 31 for amplifying the voltage pulse P ₁ corresponding to the grain is provided, and connected to this amplifier 31, furthermore, A monomulti 32 is provided which, when inputted with a voltage pulse from the amplifier 31, is turned on for a certain period of time and outputs a rectangular voltage pulse of a certain frequency and amplitude. An integrator 33 is connected to the monomulti 32 to integrate the output pulse of the monomulti 32, and an amplifier 3 is connected to the integrator 33.
4 and more members 29-34
A Glenn loss detection circuit C is formed by the above. As described above, the degree of threshing sorting in the threshing section 8 can be determined from the amount of grains in the third waste, and the grain loss detection circuit C outputs a voltage signal Vloss proportional to the amount of lost grains to its output terminal. .

FIG. 6 shows the specific structure of the dust feeding valve 15.

A plurality of dust sending valves 15 are provided on the top wall 12a of the handling chamber 12, each rotatably supported around a vertical pin 35, and each of these dust sending valves 15 has its base end connected to the top wall It is pivotally connected by a vertical pin 37 to an interlocking plate 36 provided on the upper surface side of 12a. Therefore, when the interlocking plate 36 is moved forward and backward in the direction of the arrow shown in the figure, the dust feeding valve 15 is rotated around the vertical pin 35, and this rotational displacement causes the dust feeding valve 15 to move toward the handling barrel 1.
The handling teeth 1 are implanted in a spiral manner on 3.
Change the relative angle to the arrangement direction of 4, and
The rate of dust removal from inside the handling chamber 12 is appropriately regulated by appropriately constricting, fully closing, or fully opening the dust exhaust passage between the four spaces.

The opening degree of the dust feeding valve 15, the specific structure of which has been explained above, is adjusted by displacing the interlocking plate 36 using a dust feeding valve adjustment lever 40 shown in FIG.

As shown in Fig. 1, a single-acting lever-operating hydraulic cylinder 41 whose end of the cylinder body is pivoted to the fuselage.
The piston rod 41a of the hydraulic cylinder 41 is connected to the dust feeding valve adjustment lever 40 as shown in the figure, and the cylinder 41 is compressed by supplying hydraulic oil to the oil chamber 41b of the hydraulic cylinder 41. The lever 40 can be rotated in the direction of arrow A in FIG. 1 to close the dust feeding valve 15. The re-opening after the dust feeding valve 15 is closed is the oil chamber 41.
When the hydraulic oil is discharged from b, the lever operating hydraulic cylinder 41 is extended by the return spring 41c.

FIG. 1 also shows the air volume adjustment mechanism of the winch 21.

In FIG. 1, 60 indicates a winnow shaft of the winnow 21, and this winnow shaft 60 is connected from the drive shaft 61 on the engine 11 side, which is parallel to the winnow shaft 60, to the both shafts 6.
V wound around pulleys 62 and 63 on 1 and 60
It is rotated by receiving power through a belt 64. The pulley 63 on the chisel shaft 60 is particularly
0, and a movable pulley half 63b provided on the shaft 60 with a slide key 65 so as to be slidable but not relatively rotatable. The movable pulley half 63b is connected to the fixed side by receiving both ends of the disk body 66 loosely fitted on the winnowing shaft 60 between the two pulley halves 63a and 63b and the movable pulley half 63b. a pair of compression springs 67 that slide and bias in a direction away from the pulley half 63a;
68 is provided. Further, on the base end side of the movable pulley half 63b, a cylinder 69 is provided on the winnowing shaft 60, which is fixed to the machine frame and rotatably supports the winnowing shaft 60. The cylinder 69 is used as a cylinder body by fitting the base end portions of the pulley half 63 in an oil-tight manner.
A hydraulic cylinder 70 with b as a piston,
A single-acting hydraulic cylinder 70 is constructed, which is compressed by the compression springs 67 and 68 and extended by hydraulic action on an oil chamber 70a within the cylinder 69. And karaminojiku 60
An oil distribution chamber 72 is formed at the tip of the shaft 60 by a seal housing 71 that rotatably supports the shaft 60. This oil distribution chamber 72 is connected to a hydraulic cylinder through an oil passage 73 bored in the shaft 60. 70 said oil chamber 70
It is connected to a. Further, the pulley 62 on the drive shaft 61 is also prevented from relative rotation by a fixed pulley half 62a fixedly provided on the drive shaft 61 and a slide key 74 on the boss of the fixed pulley half 62a. However, the movable pulley half 62b is slidably mounted on the movable pulley half 62b, and the movable pulley half 62b includes a spring receiving disk 75 on the drive shaft 61 and the pulley half 62b.
By means of a compression spring 76 which is received at both ends,
It is biased to slide in the direction of the stationary pulley half 62a.

As described above, the Karaoke shaft 60 applies hydraulic pressure to the oil chamber 70a of the hydraulic cylinder 70 from the state shown by the solid line in FIG.
3b is brought close to the stationary pulley half 63a as shown by the chain line to increase the effective diameter of the pulley 63,
Accordingly, when the movable pulley half 62b of the pulley 62 on the drive shaft 61 is separated from the stationary pulley half 62a as shown by the chain line via the V-belt 64, and the effective diameter of the pulley 62 is reduced, It will be rotated at low speed.

Similarly, as shown in FIG.
Oil chamber 4 of the aforementioned lever operating hydraulic cylinder 41
A hydraulic pump 44 is provided for supplying oil to the oil chamber 70a of the hydraulic cylinder 70 and the oil chamber 70a of the hydraulic cylinder 70. Hydraulic oil is supplied by this hydraulic pump 44 to an electromagnetic switching valve 4 between the pump 44 and the hydraulic cylinders 41 and 70.
This is selectively performed by 5. That is, the electromagnetic switching valve 45 is normally in the neutral position N shown in the figure under spring bias, that is, the oil chambers 41b, 70a and the hydraulic pump 44 are both connected to the hydraulic tank 42, the hydraulic cylinder 41 is in the extended state, and the hydraulic cylinder 41 is in the extended state. 70 in a contracted state, and a working position I in which it is displaced by the excitation of the solenoid 46, in which the hydraulic pump 44 is connected to the oil chambers 41b and 70a and the hydraulic cylinder 41 is operated in a contracted state. It also has an operating position I for extending the hydraulic cylinder 70.

The solenoid 46 of the electromagnetic switching valve 45 described above is
Output signal voltage of the aforementioned Glen loss detection circuit
When Vloss exceeds a certain value, it is made to be energized.

In other words, as shown in FIG.
At the negative input terminal of 7, by further appropriately adjusting the power supply voltage Vcc dropped by a resistor 48 with a variable resistor 49, a reference voltage Vo corresponding to the upper limit permissible value of grain loss amount is introduced. It has been done. Therefore, the comparator 47 outputs the excessive grain loss signal voltage Vh when the output signal voltage Vloss of the grain loss detection circuit is higher than the reference voltage Vo (Vloss>Vo). As shown in FIG. 5, the solenoid 46 is connected in parallel with a surge absorbing diode 51, and is inserted into the control circuit with one end connected to a power supply terminal and the other end grounded. A switching circuit including an NPN transistor 52 whose emitter is grounded is provided on the ground side of the solenoid 46. A comparator 47 is connected to the base of the transistor 52 via a resistor 53, and the base of the transistor 52 is connected to the base of the transistor 52. is grounded through the pull-down resistor 54 to complete the above switching circuit.

Therefore, when the comparator 47 outputs the Glen loss signal voltage Vh, the transistor 52 is switched from the off state to the on state, and the solenoid 4
6 is energized and the solenoid 46 is energized, thereby moving the electromagnetic switching valve 45 shown in FIG. 1 to the operating position I. In addition, as shown in Figure 5, Sonoraido 4
An alarm lamp 55 is provided in parallel connection with 6, and this alarm lamp 55 is turned on when the excessive grain loss signal voltage Vh is present due to the above-mentioned circuit configuration.

The embodiment shown in FIG. 1 is configured as described above, so that when the grain loss amount detected by the grain loss detector 29 or grain loss detection circuit C exceeds the set value, the first Solenoid switching valve 4 in the diagram
5 is moved to the operating position I, and as a result, the lever operating hydraulic cylinder 41 is retracted, and the dust feed valve adjusting lever 40 is rotated in the direction of arrow A in FIG. While being closed, the pulleys 63 and 62 are activated by the hydraulic cylinder 70.
By changing the effective diameter, the number of rotations of the winnow shaft 60 and therefore of the winnow 21 is reduced. Therefore, the amount of dust discharged from inside the handling chamber 12 is reduced to the maximum, and the air volume of the winch 21 is reduced, so that the operation of the threshing section 8 is controlled to reduce grain loss.

When the grain loss amount is reduced to an appropriate range, the grain loss excessive signal voltage Vh from the comparator 47 disappears, the relay 52 is deactivated, the solenoid 46 is demagnetized, and the electromagnetic switching valve 45 is neutralized. Since the lever operating hydraulic cylinder 41 is returned to the position N, the lever operating hydraulic cylinder 41 is extended and the dust feeding valve adjustment lever 40 is returned to the standard opening position of the dust feeding valve 15, and the hydraulic cylinder 70 is contracted and the pulley 63 is moved back to the position N. , 62 effective diameter is changed in the speed increasing direction, and the air volume of the winch 21 is increased. Note that excessive grain loss is indicated by lighting of the warning lamp 55.
Based on this display, the operator of the combine harvester can reduce the vehicle speed to lighten the load on the threshing section 8 and reduce the amount of grain loss.

Figures 7-11 show a second embodiment.

In this second embodiment, as shown in FIGS. 8 and 9, the chaff sheave 18 in the swing sorting mechanism 17-20 is divided into a plurality of movable sheave plates 81A located on the front side and a plurality of movable sheave plates 81A located on the rear side. A fixed sheave plate 81B is provided.

That is, the fixed sheave plate 81B is the swing sorting mechanism 1.
In contrast, each movable sheave plate 81A has horizontal support shafts 83 protruding from both sides thereof, which are rotatably supported by the side plates 82 of the movable sheave plate 81A. It is supported rotatably around a horizontal support shaft 83 between both side plates 82. Then, the rotating arms 84 attached to the horizontal support shafts 83 at one side end are connected to the side plate 82 at one side.
By connecting a pin 86 to an interlocking plate 85 provided along the outer surface of the movable sheave plate 81A, a plurality of movable sheave plates 81A can be rotated at any time by moving the interlocking plate 85 back and forth. In order to move the interlocking plate 85 forward and backward, a hydraulic cylinder 87 is provided to the interlocking plate 85, the end of which is connected to a piston rod 87a by a pin. In the illustrated case, the hydraulic cylinder 87 is configured as a single-acting type with a built-in spring 87b, and is extended by the supply of hydraulic pressure to move the movable sheave plate 81A into the small size shown in FIG. 9a. It is rotated from the inclination angle α ₁ to the large inclination angle α ₂ shown in FIG. 9b.

Furthermore, in the second embodiment, as shown in FIG.
A rotatable switching plate 90 is provided at the grain flow branching point position to the first port 23 and the second port 24 described above,
The attitude of the switching plate 90 is changed to the first position 23 according to the degree of sorting.
It is possible to change between the attitude of guiding the grains to the second port 24 and the attitude of guiding the grains to the second opening 24 by a single-acting hydraulic cylinder 91 shown in FIG. The hydraulic cylinder 91 is supplied with hydraulic pressure when the sorting degree is poor and switches to the switching plate 90.
It is said that the grains are brought into a posture of guiding the grains to the second port 24.

Similarly, as shown in FIG. 10, in the second embodiment, a sorting degree detector 29A that detects the sorting degree from the straw waste ratio in sorted grains is tilted toward the first opening 23 at the lower side of the grain sieve 19. On the flow grain board 79 which is provided so as to guide the grains leaking through the grain sieve 19 toward the first mouth 23,
It is provided.

Unlike the band-pass filter 30 described above, the band-pass filter 30A attached to the selectivity detector 29A, as shown in _{FIG .} The structure is such that only the voltage pulse P ₂ corresponding to the grain is filtered, and the voltage pulse P ₁ corresponding to the grain is cut and not transmitted to the secondary side. Thereby, the sorting degree detector 29A directly detects the sorting degree by detecting the straw waste ratio in the grains after sorting.

As shown in FIG. 7, the same electromagnetic switching valve 45 as shown in FIG. It is supposed to be controlled by. Solenoid switching valve 45
The solenoid 46 is energized in response to the output signal of the selectivity detector 29A when the selectivity falls below a predetermined lower limit value by a control circuit similar to the control circuit shown in FIG.

Therefore, when a poor sorting degree is detected, the electromagnetic switching valve 45 shown in FIG.
As shown in FIG. b, the inclination angle of the movable sheave plate 81A is made small to reduce the rate of threshing leakage from the chaff sheave 18, and the hydraulic cylinder 91 is extended so that the switching plate 90 shown in FIG. The posture is changed to a posture that guides the grains toward the opening 24. When the degree of sorting recovers to the appropriate range, the solenoid switching valve 45
is returned to the neutral position N, and the movable sheave plate 81A
is increased as shown in FIG. 9a, and the switching plate 90 shown in FIG.
3, it is returned to the posture of guiding the grain.

Effects of the invention Angle adjustment of the dust feeding valve 15, angle adjustment of the movable sieve plate 81A, air volume adjustment of the winch 21, and first opening 23
At least two of the four types of adjustments that are closely related to each other and affect the sorting accuracy, such as adjusting the attitude of the switching plate 90 at the grain falling junction position with respect to the second port 24 and the second port 24. A single sensor 2
According to the invention, two or more closely related adjustments are made automatically and simultaneously in response to output signals from sensors 29, 29A.
29A and without any time delay between the adjustments. Moreover, rather than making each adjustment based on separate control criteria, such as output signals from multiple sensors, a single sensor 29,
Since control is performed based on a single control standard detected by 29A, uniformity of control is maintained and targeted control is performed with high precision. Therefore, according to the present invention, the sorting accuracy is significantly improved compared to the conventional case.

In addition, as mentioned above, if each adjustment is based on a separate control criterion, the adjustment operation will be performed indiscriminately and damage to related moving parts will be promoted, whereas a single control criterion related to the degree of sorting According to the present invention, in which a plurality of simultaneous adjustments are made based on the above, frequent adjustment operations are avoided and the life of the movable member is maintained for a long time.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view and hydraulic circuit diagram showing the main parts of the first embodiment, Fig. 2 is a schematic side view of a combine equipped with the first embodiment, and Fig. 3 is a threshing harvester of the combine. FIG. 4 is a schematic diagram for explaining the action of the two members in the first embodiment, FIG. 5 is a circuit diagram of the electric circuit in the first embodiment, and FIG. FIG. 3 is a perspective view showing only the main parts of the threshing section shown in the drawings, FIG. 7 is a circuit diagram showing a hydraulic circuit provided in the second embodiment, and FIG. 8 is a diagram related to the second embodiment. A perspective view showing the main parts of the combine threshing section, FIGS. 9a and 9b are longitudinal sectional side views for explaining the action of the main parts shown in FIG. 8, and FIG. FIG. 11 is a schematic longitudinal sectional side view showing a part of the combine threshing section, and is a schematic diagram for explaining the action of the two members in the second embodiment. 8...Thresking section, 12...Handling room, 15...Dust valve, 18...Chaff sieve, 21...Kingen, 23
...First exit, 24...Second exit, 36...Interlocking board,
40... Dust sending valve adjustment lever, 41... Hydraulic cylinder for lever operation, 45... Solenoid switching valve, 60...
Karaoke shaft, 62, 63...Pulley, 64...V belt, 62b, 63b...Movable side pulley half,
69...Cylinder, 70...Hydraulic cylinder, 81
A...Movable sheave plate, 82...Side plate, 83...Horizontal support shaft, 84...Rotating arm, 85...Interlocking plate,
87...Hydraulic cylinder, 90...Switching plate, 91...
...Hydraulic cylinder.

Claims (1)

[Claims] 1 Dust feeding valve 1 that controls the degree of dust removal from inside the handling room 12
5, the angle adjustment of the movable sheave plate 81A of the chaff sheave 18 in the swing sorting mechanism, the air volume adjustment of the winnower 21, and the grain flow branching point position for the first opening 23 and the second opening 24. At least two of the attitude adjustments of the rotatable switching plate 90 are automatically and An operating control device for a threshing machine, which is provided with simultaneous adjustment actuation means 45.