JPH04222515A - Grading-control unit of thresher - Google Patents

Abstract

PURPOSE:To rapidly dissolve a state of clogging by attaching a control unit capable of adjusting the capacity of a separator to a specified state according to the thickness of a layer of materials to be treated on a shaking sifter. CONSTITUTION:The thickness of a layer of materials to be treated on a shaking sifter 17 is monitored by a sieve sensor (S4). In case the thickness of the layer of materials to be treated is larger than the first set value and lower than the second set value (state immediately before clogging), the capacity of a separator (B) is controlled not towards the reduction side but only towards the increase side. When the thickness of the layer of materials to be treated has a value larger than the second set value (state of clogging), the capacity of the separator (B) is kept to a value of the maximum capacity or a value in the vicinity thereof.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention increases the throughput of a sorting device as the amount of grain culm supplied increases, based on the detection information of a grain culm supply amount detection means that detects the amount of grain culm supplied to a handling room. The present invention relates to a threshing sorting control device provided with control means for adjustment.

0002

2. Description of the Related Art As a conventional example of such a threshing sorting control device, there is a threshing sorting control device for a combine harvester disclosed in Japanese Patent Laid-Open No. 2-54296. In this conventional example, means for detecting the traveling speed of the combine harvester is provided, and this detected information is regarded as the detected amount of grain culm supply. in general,
This is because within the same field, the amount of grain culm supplied to the handling room, that is, the amount of grain culm reaped, is proportional to the traveling speed. The faster the traveling speed, that is, the larger the amount of grain culm supplied, the larger the opening of the chaff sieve provided in the sorting device of the threshing section, and the greater the throughput of the sorting device by increasing the flow rate of the winnowing air. There is.

0003

[Problems to be Solved by the Invention] In the conventional threshing sorting control device described above, when the amount of grain culm supplied suddenly increases due to some reason, even if the opening degree of the chaff sieve is increased, it cannot catch up and the amount of grain on the chaff sieve increases. The amount of material to be processed may increase and clogging may occur. In such a case, the operator reduces the traveling speed based on the clogging alarm and reduces the grain culm supply amount, and at the same time switches the processing capacity control of the sorting device from automatic control to manual control and fixes it at a larger capacity. When the clogging state is no longer detected and the alarm stops, the processing capacity control of the sorting device is switched to automatic control again. The present applicant recently filed an application regarding a threshing and sorting control device that can clear the above-mentioned clogging condition without switching the throughput control of the sorting device to manual control. This is because when the processing capacity of the sorting device is automatically controlled based on the grain culm supply amount, if a sensor that detects the thickness of the layer of processed material on the swinging sorting plate detects a state on the verge of clogging, The adjustment to decrease the throughput of the sorting device is stopped and only adjustment to increase is performed. As a result, even if the running speed is lowered and the grain culm supply amount is reduced due to normal operation, the processing capacity before shifting to the above state is maintained, so the amount of processed material is gradually reduced and the clogging state is released. The reason why it is possible to adjust the processing capacity to increase without fixing it is to take into consideration the possibility that the amount of grain supplied increases due to an operational error or the like. However, if the amount of grain culm supplied continues to increase due to an operational error or the like, the amount of processed material on the oscillating sorting plate may continue to increase. If this condition is left unaddressed, a clogging condition of the material to be processed will eventually occur, and there is a risk that the condition will worsen to the extent that it cannot be easily cleared. The present invention has been made in view of the above circumstances, and its purpose is to provide a threshing sorting control device that can detect the above-mentioned clogging condition and quickly release the condition. be.

0004

[Means for Solving the Problems] The threshing sorting control device according to the present invention detects the amount of grain culm supplied to the handling room based on the detection information of the grain culm supply amount detection means that detects the amount of grain culm supplied to the handling room. A control means is provided for adjusting the processing capacity of the sorting device, and the first characteristic configuration is to adjust the thickness of the layer of the processed material on the swinging sorting plate provided in the sorting device. A processing material amount detecting means is provided, and the control means stops adjusting the processing capacity toward a decreasing side when the thickness of the layer of the processing material is equal to or greater than a first set value and less than a second set value. The present invention is configured such that the processing capacity is adjusted only to the increasing side, and when the processing capacity is equal to or higher than the second set value, the processing capacity is maintained at the set processing capacity. A second characteristic configuration is that the sorting device is provided with processing material amount detection means for detecting the thickness of the layer of the processing material on the swinging sorting plate, and the control means is configured to detect the thickness of the layer of the processing material When the processing capacity is equal to or higher than the first set value, the adjustment to the decreasing side of the processing capacity is stopped and only the adjustment to the increasing side is performed, and furthermore, when the processing capacity is equal to or higher than the second set value, the adjustment to the increasing side is performed. A threshing sorting control device configured to adjust the throughput of the sorting device to a throughput obtained by adding a set value to a target throughput obtained by only the threshing and sorting device.

[0005]

[Operation] According to the first characteristic configuration, when the processing material amount detection means detects that the thickness of the layer of the processing material on the oscillating sorting plate has reached the first set value or more (a state on the verge of clogging), The control means stops adjusting the processing capacity of the sorting device to the side of decreasing and only adjusts it to the side of increasing. In other words, even if the grain culm supply amount is reduced by an appropriate operation such as lowering the traveling speed, the processing capacity of the sorting device will not decrease and will maintain the state before the grain culm supply amount was reduced; If the amount of grain culm supplied increases due to reasons such as this, the processing capacity of the sorting device will also increase accordingly. Therefore, if the grain culm supply amount is reduced by appropriate operation, the amount of processed material on the swinging sorting plate will gradually decrease. When the thickness of the layer of the material to be treated becomes less than the first set value, normal control is resumed in which the processing capacity of the sorting device is increased as the amount of grain culm supplied increases. On the other hand, if the amount of grain supplied continues to increase due to an operational error, etc., and the increasing trend continues for a while without decreasing the amount of processed material, the thickness of the layer of processed material will eventually exceed the second set value (clogging state). As the processing material amount detection means detects this, the control means changes and maintains the processing capacity of the sorting device to, for example, the maximum processing capacity or a set processing capacity close to the maximum processing capacity. As a result, the amount of processed material on the swinging sorting plate rapidly decreases, and when the layer thickness eventually becomes less than the first set value, the normal control is resumed. According to the second characteristic configuration, the control method when the thickness of the layer of the object to be treated exceeds the second set value is different from that in the first characteristic configuration. In other words, the processing capacity of the sorting device is adjusted to the processing capacity obtained by adding the set value to the target processing capacity obtained as a result, while continuing to adjust only to the increasing side when it exceeds the first set value. . In other words, while maintaining the maximum processing capacity after it exceeds the first set value, the processing capacity of the sorting device is adjusted to the processing capacity plus the set value, thereby quickly reducing the amount of material to be processed on the oscillating sorting plate. decrease to Other effects are the same as those of the first characteristic configuration.

[0006]

According to the first or second characteristic configuration, the processing material amount detection means for detecting the thickness of the processing material layer on the oscillating sorting plate can be used not only when the processing material is about to become clogged, but also when the processing material is about to become clogged. Since the clogging state is also detected and the control means accordingly controls the sorting device to an appropriate processing capacity, the clogging state can be quickly cleared, resulting in a highly safe threshing and sorting control device. Further, according to the second characteristic configuration, the above-mentioned clogging state (
The processing capacity of the sorting device after the second setting value or higher) is detected is adjusted to the processing capacity of the setting value added to the maximum processing capacity before the transition to that state, so unnecessary processing It is now possible to appropriately release the clogged state while increasing the capacity and avoiding a decrease in sorting accuracy.

[0007]

Embodiments Hereinafter, embodiments in which the present invention is applied to a so-called self-extracting type combine harvester will be described with reference to the drawings.

As shown in FIG. 4, the self-ejecting type combine harvester includes a machine body V equipped with a pair of left and right crawler running devices 1, a boarding control section 2, and a threshing section 3, and a drive unit at the front of the machine body V. It consists of a reaping pre-processing section 4 which is attached so as to be movable up and down. The reaping pre-processing section 4 includes a weeding tool 5 attached to the tip.
, a triggering device 6 for raising grain culms in the field, a cutting blade 7 for cutting the base of the raised grain culms, and a conveying device 9 for reaping and conveying the grain culms to the feed chain 8 of the threshing section 3.

To explain the power transmission system, as shown in FIG.
It is also transmitted to the transmission section 13 of the crawler traveling device 1 via the belt tension type traveling clutch 11 and the hydraulic continuously variable transmission device 12 for traveling. A part of the output transmitted to the transmission section 13 is transmitted to the reaping pre-processing section 4 via a belt tension type reaping clutch 14.
is transmitted to. In the figure, S1 is a speed sensor that detects the traveling speed of the aircraft V based on the output rotation speed of the transmission 12, and as described later, the amount of grain culm supplied to the handling room A is detected. It acts as a detection means.

As shown in FIG. 5, the threshing section 3 includes a handling cylinder 1 that handles and processes grain culms that are held and conveyed by a feed chain 8.
5, and a sorting device B that sorts out the leaked waste from the handling room A. The sorting device B includes a winch 16 that sends wind for sorting and a swinging sorting plate 17. At the lower part of the handling chamber A, a receiving net 18 for leaking the threshed material is provided along the lower outer periphery of the handling barrel 15, and it collects single grains and fine straw from the threshed material. The waste leaks from the receiving net 18 to the sorting device B, and the grains and straw waste that cannot leak fall into the sorting device B from the rear end of the receiving net 18.

The swing sorting plate 17 includes a grain pan 19 and a chaff sieve 20 arranged sequentially from the front to the rear, and a grain sieve 21 located below the chaff sieve 20, each of which has a left and right pair. It is fixed between the side plates 22 of and is formed into a plate shape as a whole. At the bottom of the swinging sorting plate 17, there is a top collection part 23 that collects grains leaking from the grain sieve 21, and a part that collects straw waste and other grains that fall from the rear end of the chaff sieve 20 and the rear end of the grain sieve 21. A second product collection section 24 that collects the mixture of
and is provided. Note that the processed materials collected in the second material collection section 24 are returned to the sorting device B and are subjected to the sorting process again.

As shown in FIG. 6, the chaff sieve 8 has a plurality of strip-like members 20a arranged in parallel in the direction of transport of the processed material, each of which is rotatable relative to the left and right side plates 22 with its upper end serving as a fulcrum. It was attached to. The angle of each band plate member 20a is simultaneously changed by pushing and pulling the operating rod 25 pivotally attached to the lower end of each band plate member 20a in the front-rear direction. As a result, the spacing t between adjacent strip plate members 20a (hereinafter referred to as chaff sheave opening degree) can be changed and adjusted.

A DC motor M1 is provided to electrically change and adjust the opening degree of the chaff sheave, and a gear type linkage mechanism 2
6. A swing arm 27 is connected to the operating rod 16 via a release wire 28. In the figure, 29 is a spring that urges the chaff sheave to return to the closing side, and S2 is a potentiometer-type chaff sheave opening sensor for detecting the rotation angle of the swing arm 27 as the chaff sheave opening. The DC motor M1 can be switched between forward and reverse rotation by changing the polarity of the applied voltage.

The winnowing machine 16 uses a so-called split pulley type continuously variable transmission device, so that the amount of air blown can be changed and adjusted by changing its rotation speed. As shown in FIG. 7, the input pulley 30 that rotationally drives the winch 16 is composed of a split pulley, and its effective diameter is changed by driving the DC motor M2 in forward and reverse directions. That is, DC motor M2
The forward and reverse rotation is transmitted to the operating arm 31 via the linkage mechanism 32, the swing arm 33, and the release wire 34, and changes the effective diameter of the input pulley 30. Therefore, by changing and adjusting the rotational speed of the front winnowing machine 16, the amount of air blown therefrom (hereinafter referred to as the winnowing air volume) can be changed and adjusted. Note that 35 is a drive belt for the input pulley 30, and S3 is a potentiometer-type winnow air flow sensor that detects the rotation angle of the swing arm 33 as the winnow air flow rate.

As described above, the sorting device B is configured so that its throughput can be adjusted by changing and adjusting the chaff sieve opening degree and the winnowing air volume. These changes and adjustments are controlled by a control means 36 equipped with a microcomputer, as shown in FIG. Basically, as shown in FIGS. 8 and 9, control is performed so that both the chaff sheave opening degree and the winnowing air volume are increased as the traveling speed increases, based on the information detected by the speed sensor S1 described above. In general, within the same field, the amount of grain culm supplied to handling room A, that is, the amount of grain culm reaped, is proportional to the traveling speed, and the more processed material there is, the larger the chaff sieve opening and the amount of air in the winnowing machine are used for sorting. This is because it is necessary to increase the processing capacity of device B.

Furthermore, as shown in FIG. 1, a chaff sheave opening setting device VR1 and a winnowing air volume setting device VR2 are provided, and by manually setting these, the chaff sheave opening degree and the winnowing air volume can be adjusted within the range shown by broken lines in FIGS. 8 and 9. can be changed and adjusted. These setting devices are used by the operator to change and set the offset of the chaff sieve opening and the air flow rate of the chiffon as necessary, and are used while referring to the monitor display of the amount of processed material by the sieve sensor S4, which will be described below. .

The sheave sensor S4 is processing material amount detection means for detecting the thickness of the material layer on the swinging sorting plate 17, and is attached to the lower surface of the receiving screen 18 as shown in FIG. As shown in FIG. 10, there is a plate-shaped contact T whose upper part is pivoted and whose lower part is rotatable in the direction of transferring the material to be processed (rearward), and the resistance value changes depending on the rotation angle of the contact T. A variable potentiometer PM is provided. The backward rotation angle of the contactor T changes depending on the thickness of the layer of the material to be treated on the chaff sieve 20. In other words, the thicker the layer of the material to be treated, the larger the backward rotation angle of the contact T. Therefore, the control means 36 controls D corresponding to the resistance value of the potentiometer PM.
The thickness of the layer of the object to be treated can be determined from the C voltage input.

[0018] As the swinging sorting plate 17 swings, the rotation angle of the contactor 21 of the sheave sensor S4 changes, and accordingly, the resistance value of the potentiometer PM also changes periodically. The control means 36 controls the D
The C voltage input is sampled, and the average value of the four sampled data is taken as the detection value of the sheave sensor S4. In the following description, "detected value of sheave sensor S4" means this average value.

Sheave sensor S obtained as described above
The detected value Y of 4 (digital value of 1 to 255) is divided into five stages of 1 to 5. 1 means the state where the thickness of the layer of the processed material is the thinnest, 5 means the state where the thickness of the layer of the processed material is the thickest,
That is, it means a clogged state. The values of these five stages are shown in Figure 1.
It is displayed on the sheave monitor 37 as shown in FIG. In other words,
The bar graph display 37 displays the level, and the 7 segment display 37b displays the numerical value. The sheave monitor 37 is provided in the boarding control section 2, and the operator changes and sets the offset of the automatic control amount of the chaff sheave opening degree and the winnowing air volume as described above while referring to this monitor. That is, if the displayed value of the sheave monitor 37 continues to deviate from 2 to 3, the chaff sheave opening setting device VR1 and the winnowing air volume setting device VR2 are operated to adjust the displayed value back to 2 to 3.

The sheave monitor 37 is also equipped with a message display 37c and a buzzer 37d for warning of clogging.
These are activated when the displayed value is 4 or 5. That is, when the detected value Y (display value) of the sheave sensor S4 is 4, it means that the condition is on the verge of clogging (hereinafter referred to as a caution area), so the message display 37c displays "SHIEBU CHUI" and the buzzer 37d is turned off for 2 seconds. It rings for 0.1 seconds each time. Also, when the detected value Y (display value) of the sheave sensor S4 is 5, it is a clogging condition (hereinafter referred to as an alarm area), so the message display 37c displays "sieve keihou".
is displayed, and the buzzer 37d sounds for 0.1 seconds every second.

However, as shown in the flowchart of FIG. 2, the monitor display and alarm based on the detected value of the sheave sensor S4 are not performed when the threshing switch SW1 is off or for 10 seconds after it is turned on. When the threshing switch SW1 is off, the swinging of the swinging sorting plate 17 is stopped and the sheave sensor S4
This is because the thickness of the layer of the processed material cannot be detected correctly. Further, even if the speed change per unit time obtained from the detection information of the speed sensor S1 exceeds a predetermined value, the monitor display and warning are not performed for 3 seconds thereafter. This is because the sheave sensor S4 makes false detections due to its inertia due to rapid speed changes. The threshing switch SW1 is a switch that monitors the state of the threshing clutch 10 described above, and is turned on when the threshing clutch 10 is engaged. The above times (10 seconds and 3 seconds) can be changed arbitrarily by changing the values in the data table stored in the control means 36. It may also be changed using a dip switch or the like.

The detected value Y of the sheave sensor S4 is used not only for monitor display and alarm as described above, but also for control to release or avoid clogging conditions as described below. As shown in the flowchart of FIG. 2, in a state where the detection value Y of the sieve sensor S4 is smaller than Y1, that is, in a normal state where the thickness of the layer of the processed material on the chaff sieve 20 is smaller than the first set value, the control means 36 operates as described above. The chaff sheave opening degree T and the winnowing air volume determined based on the detection information X of the speed sensor S1 are used as the final chaff sheave opening/closing control amount R.
and Karakin air flow control amount. Here, Y1 can be arbitrarily set as an 8-bit digital value before being divided into the five stages described above, but in this embodiment, Y1 is set to 99H ( 153) in decimal. Although FIG. 2 shows only the control of the chaff sheave opening degree to avoid complexity, the flow rate of the chiffon airflow is also controlled in the same manner.

When the detected value Y of the sheave sensor S4 exceeds the first set value Y1, the control means 36 compares T and R, and replaces R with T only when T is larger than R. That is, the opening/closing control amount R is updated only when the newly determined chaff sheave opening degree T based on the detection information Keep R. In other words, the adjustment of the chaff sheave toward the closing side is stopped, and only the adjustment toward the opening side is performed. The air volume of the winnowing machine is also controlled in the same way, and in combination, the adjustment of the processing capacity of the sorting device B to the decreasing side is stopped and only the adjustment to the increasing side is executed.

As a result, when the traveling speed is lowered based on the monitor display and warning, the chaff sieve opening degree and the winnowing air volume are prevented from decreasing accordingly, and as the grain culm supply amount decreases, the chaff sieve 20 upper The amount of processed material will gradually decrease. The reason why the processing capacity of the sorting device B is not fixed and only adjusted to the increasing side is in case the running speed is increased due to an operational error and the amount of grain culm supplied increases.

[0025] If the grain culm supply amount continues to increase and the amount of processed material on the chaff sieve 20 further increases, and the detection value Y of the sieve sensor S4 becomes equal to or higher than the second set value Y2, the control means 36
As shown in process (a), the opening/closing control amount R of the chaff sheave is replaced with the maximum opening degree or a predetermined opening degree R1 close to it. Similarly, the air flow rate of the drawer is replaced with the maximum air flow rate or a predetermined air flow rate close to it, and together the processing capacity of the sorting device B is fixed at the maximum capacity or a predetermined capacity close to it. This control is performed in order to promptly eliminate the clogging state of the processing material. Here, the second set value Y2 can be arbitrarily set as an 8-bit digital value before being divided into the five stages described above, but in this embodiment, the lower limit of display value 5 (alarm area) after being divided into five stages is used. The total number is CCH (204 in decimal).

When the amount of processed material on the chaff sieve 20 decreases and the detection value Y of the sieve sensor S4 becomes less than the second set value Y2, the above-mentioned adjustment of the processing capacity of the sorting device B to the decreasing side is stopped and the processing capacity is increased. Perform side adjustments only. In the end, the predetermined performance is maintained until the detected value Y of the sheave sensor S4 becomes less than the first set value Y1.

The process (a) in FIG. 2 of the above embodiment can also be performed as follows. That is, the chaff sheave opening/closing control amount R obtained as described above is increased by two steps (but only once). The air flow rate of the Karaoke is increased by one step, and the processing capacity of the sorting device B is increased by the set value. In this case as well, the maximum processing capacity is maintained until the detected value Y of the sheave sensor S4 becomes less than the first set value Y1. In the above embodiment, the speed sensor S1 was used as the grain culm supply amount detection means for detecting the grain culm supply amount to the handling room A, but as other sensors,
For example, it is also possible to use one that detects the thickness of the grain culm layer conveyed by the feed chain 8 of the threshing section 3.

The sorting device B of the present embodiment adjusts its processing capacity by adjusting the chaff sieve opening and the winnowing air volume, but various specific configurations can be used to adjust the chaff sieve opening and the winnowing air volume. Can be changed. Further, the present invention can also be applied to a sorting device that performs processing capacity adjustment in various ways as described below. ■ A method that changes the oscillation period (oscillation speed) of the oscillation sorting plate. ■ A method that changes the inclination angle of the oscillating sorting plate. ■ A method in which a shielding plate is moved in and out to adjust the filtration area of chaff sieves, grain sieves, etc. ■A method that changes the spacing between adjacent rack plates in the sorting rack.

[0029] In the above embodiment, the present invention was applied to a so-called self-removal type combine harvester, but it can also be applied to a full-rod loading type combine harvester. The specific configuration of each part can be changed in various ways.

Although reference numerals are written in the claims for convenience of comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a threshing sorting control device for a combine harvester according to an embodiment of the present invention.

[Figure 2] Flowchart of the threshing sorting control device

[Fig. 3] An explanatory diagram of a power transmission system of a combine harvester according to an embodiment of the present invention.

[Figure 4] Side external view of the combine harvester

[Figure 5] A cutaway side view showing the threshing section of the combine harvester.

[Figure 6
]Explanatory diagram showing the opening adjustment mechanism of the chaff sheave

[Figure 7] Explanatory diagram showing the Karakin air volume adjustment mechanism

[Fig. 8] Explanatory diagram showing the relationship between chaff sheave opening and traveling speed

[Fig. 9] Explanatory diagram showing the relationship between the air volume and traveling speed

[Figure 10] Schematic configuration diagram of sheave sensor

[Explanation of symbols]

17. Oscillating sorting plate 36 Control means A. Handling room B Sorting device S1 Grain culm supply amount detection means S4 Processed material amount detection means

Claims (2)

[Claims] Claim 1: Based on the detection information of the grain culm supply amount detection means (S1) that detects the grain culm supply amount to the handling room (A), the processing capacity of the sorting device (B) increases as the grain culm supply amount increases. A threshing sorting control device is provided with a control means (36) that adjusts to increase the thickness of the layer of the processed material on the swinging sorting plate (17) provided in the sorting device (B). A processing material amount detection means (S4) is provided for detecting the amount of processed material (S4), and the control means (S4)
36), when the thickness of the layer of the processed material is equal to or greater than the first set value and less than the second set value, the adjustment to the decreasing side of the processing capacity is stopped and only the adjustment to the increasing side is performed. , a threshing sorting control device configured to maintain the processing capacity at the set processing capacity when the processing capacity is equal to or higher than a second set value. 2. Based on the detection information of the grain culm supply amount detection means (S1) that detects the grain culm supply amount to the handling room (A), the processing capacity of the sorting device (B) increases as the grain culm supply amount increases. A threshing sorting control device is provided with a control means (36) that adjusts to increase the thickness of the layer of the processed material on the swinging sorting plate (17) provided in the sorting device (B). A processing material amount detection means (S4) is provided for detecting the amount of processed material (S4), and the control means (S4)
36), when the thickness of the layer of the object to be processed is equal to or greater than the first setting value, the adjustment to the decreasing side of the processing capacity is stopped and only the adjustment to the increasing side is executed; In a state where the value is higher than the target processing capacity, the selection device (B)
a threshing sorting control device configured to adjust the throughput of the threshing sorter;