JP2000270668A - Combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the lowering of threshing and screening accuracy caused by the difference of reaping style. SOLUTION: Threshed grains spilled down from a threshing chamber A of a threshing part 2 are classified by the swinging motion of a swinging selection plate 19. The thickness of the grain layer is detected with a thickness detection means S3 in the middle of the swinging transfer direction on the selection plate. The mesh opening of the swinging selection plate 19 is controlled with a threshing and selection controlling means 100 to keep the detected thickness of the grain layer to a preset target thickness. When the reaping style is judged to the other style, the target thickness is decreased from the above preset thickness.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sorting apparatus provided with an oscillating sorting plate for sifting and sorting a processed material leaking from a handling chamber in a threshing unit, and an oscillating sorter on the oscillating sorting plate. A layer thickness detecting means for detecting a layer thickness of the processing object at an intermediate point in the dynamic transfer direction; and the swinging means such that the layer thickness of the processing object detected by the layer thickness detecting means becomes a set target layer thickness. The present invention relates to a combine provided with threshing selection control means for executing threshing control for changing and adjusting a leak opening degree of a dynamic selection plate.

[0002]

2. Description of the Related Art Conventionally, in a combine having the above-mentioned structure, the threshing / sorting control means has conventionally been operated so that the layer thickness of the processed material detected by the layer thickness detecting means always becomes the set target layer thickness. It was configured to change and adjust the leakage opening of the dynamic sorting plate.

[0003]

In this type of combine, when the planted grain culm is cut, for example, as a cutting form, a plurality of stem culms in a cutting section are formed so as to form a row in the traveling direction of the body. A line-cutting type in which stems are introduced one by one into the introduction route, and other types of cutting, for example, two stems in one stem-culm introduction route in order to divide the cutting work range. There is a middle split type or the like that cuts and runs in the middle of the planted grain culm group while introducing the culm row, but compared to the cut grain culm amount in the row cutting form, the cut grain culm amount in the other cutting form, that is, In addition, the amount of grain culm supplied to the threshing unit increases.

[0004] In the above-mentioned conventional configuration, even with such a difference in the mode of cutting, the cutting grain culm is supplied to the threshing section,
The amount (layer thickness) of the processed material that has been handled in the handling room and leaked downward is detected by the layer thickness detection means, and the leak is opened so that the detected value becomes the set target layer thickness. It was adapted by adjusting the degree. That is, in the above-mentioned conventional configuration, the layer thickness detecting means is configured to detect the layer thickness of the processed material at an intermediate point in the rocking transfer direction on the rocking sorting plate. In the reaping operation, the reaping is often performed in this form). When the reaping operation is performed, the layer thickness detection is performed so that the leaking is properly performed and the proper leaking is performed. A target layer thickness at a location where the means is provided is set, and the leakage opening of the swinging selection plate is adjusted so that the detection value of the layer thickness detecting means becomes the target layer thickness.

However, in other types of cutting other than the above-mentioned type of cutting, the amount of grain culm supplied to the threshing unit is larger than that in the case of the type of cutting, and the intermediate point in the swinging transfer direction is increased. Even if the degree of opening is adjusted so that the layer thickness of the processed material at the target layer thickness becomes the target layer thickness, the amount of waste generated is large, and the processed material is rocked to the end of the rocking sorting plate in the rocking transfer direction. Even if it is transported, the material is not sufficiently screened and the threshing material is clogged, or it is discharged to the outside of the device without being processed, so-called the third loss increases. However, there is a high possibility that the threshing / sorting accuracy is reduced.

The present invention has been made in view of such a point, and an object of the present invention is to eliminate the disadvantages described above and to prevent a decrease in threshing and sorting accuracy.

[0007]

According to the first aspect of the present invention, the cutting method for the stem and culm introduced into the plurality of stem and culm introduction paths of the cutting unit is such that a row is formed in the traveling direction of the body. A cutting type discriminating means for discriminating whether the cutting type is a cutting type in which stems are introduced one by one into each of the stem and culm introduction paths so as to be formed, or a cutting type other than the cutting type. Provided, the threshing sorting control means, based on the information of the cutting type determination means, when the cutting type is determined to be the other cutting type, the set amount than the set target layer thickness The threshing control is executed by setting a small value as the target layer thickness.

Therefore, the cutting type discriminating means judges whether the cutting type is the line cutting type or another cutting type, and judges that the cutting type is another cutting type based on the information. Then, a value smaller than the set target layer thickness by a set amount is set as the target layer thickness, and the threshing control is executed. As a result, even if the amount of the cut grain culm supplied to the threshing unit due to the difference in the cut type is larger than that in the case of the row cut type, the layer thickness of the processed material at the location where the layer thickness detecting means is provided is reduced. The leakage opening is changed and adjusted so as to reduce the set amount, so the amount of processed material that is transferred without leaking to the end of the swing sorting plate in the transfer direction is reduced, and appropriate leak sorting is performed. By doing so, it is possible to avoid disadvantages such as clogging of the threshing product and an increase in the amount of third loss.

According to a second aspect of the present invention, in the first aspect, the threshing / sorting control means sets an adjustment range of a leakage opening of the swing sorting plate larger than a set lower limit. It is configured to change and adjust within a range, and is configured to change and set the lower limit value of the adjustable range to a large side when the cutting mode is determined to be the other cutting mode.

When the cutting mode is determined to be another cutting mode, the lower limit value of the adjustable range of the leakage opening of the swing sorting plate is increased as compared with the case where the cutting mode is determined. Let the side change it. In the other types of cutting, the amount of generated waste such as straw is larger than that in the type of cutting.For example, the amount of the material to be leaked is temporarily reduced, and the opening of the rocking separation plate is adjusted to the small side. In this case, the amount becomes larger than the set lower limit, so that the amount of the processed material transferred without leaking to the end of the swing sorting plate in the transfer direction is reduced.

According to a third aspect of the present invention, in the first or second aspect, among the plurality of stem-and-culm introduction paths, when the cutting mode is the other cutting mode, the line cutting mode is used. A stalk culm presence sensor for detecting the presence or absence of a stalk culm of the increased stalk culm line in the stalk culm introduction path in which the number of stalk culm lines to be introduced is increased by one line, Is configured to determine the type of cutting based on the detection information of the stem stalk presence / absence sensor.

[0012] When the cutting mode is the other cutting mode, in one of the plurality of stem and stem introduction paths,
The number of stalk culm rows to be introduced is increased by one row compared to the case of the row cutting type. Thus, when only one stalk culm row is introduced to the stalk culm introduction route, and when the number of stalk culm rows is one row. In many cases, the stem passage position along the body width direction in the stem introduction route is different, so by detecting the presence or absence of the stem at the stem passage position when the number of rows increases, harvesting with a simple configuration The format can be determined. Moreover, in this way, before the harvested culm is conveyed to the threshing unit and processed, the cutting type can be determined and the target layer thickness can be changed and set. An appropriate control state can be set before the leakage.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the combine includes a pair of left and right crawler traveling devices 1, a threshing device (threshing unit) 2, and a reaping device (reaching unit) 4 that moves up and down on the front side of an airframe V including a control unit 3 and the like. It is provided freely. The mowing device 4 is configured to be able to move up and down and swingably around the horizontal axis X with respect to the machine body V. The mowing device 4 separates and cuts a root portion of a planted grain culm which is an example of a stem culm to be mowed. Weeding tools 5, a triggering device 6 for causing a lodged planted grain culm, a cutting blade 7 for cutting the root of the caused planted grain culm,
The apparatus is provided with a transport device 9 and the like for transporting the cut culm to a threshing feed chain 16 on the rear side of the machine body while changing the cut culm to a sideways posture. The transfer device 9
A stock sensor S0 is provided at the starting point of the conveyance to be in contact with the stem of the harvested grain culm, and the harvested grain culm contacts the stock sensor S0 and is turned on during the mowing operation. When the harvesting operation is completed, the supply of the harvested grain culm is interrupted, so that the grain culm does not contact the stock sensor S0 and is turned off.
This stock sensor S0 detects whether or not the harvesting operation is in progress.

FIG. 2 shows a transmission configuration of the combine. The power of the engine E is supplied to the threshing device 2 via a belt-tensioning threshing clutch 10, while the power of the engine E is supplied to the left and right crawlers via a main clutch 11, a hydraulic stepless transmission 12, and a transmission case 13. The transmission system is configured such that the power output from the transmission 12 after being supplied to the traveling devices 1 and 1 is supplied to the reaper 4 via the reaping clutch 14. Further, a threshing switch SW1 for detecting the on / off state of the threshing clutch 10 is provided.

As shown in FIG.
Four introduction paths L1 to L4 for the planted grain culm as a path for stem culm introduction are formed between the plurality of weeding tools 5, and in a normal cutting operation, each of the paths L1 to L4 is respectively provided. It has a four-row cutting configuration in which cutting is performed in a state where one row of planted grain culm is introduced. The width of the introduction path L4 located on the most cutting side is formed larger than the width of the other introduction paths. It is configured such that two rows of planted grain culms can be introduced into the path located on the cutting side.

The harvesting method using the combine will be described. Generally, the planted grain culm is planted so as to form a row in the planting direction. A row cutting mode (see FIG. 10 (a)) that runs in a direction parallel to the planting direction of the planted grain culm so that one row of planted grain culm is introduced. A side-cutting type that runs in a direction substantially perpendicular to the direction in which the rows are formed (see FIG. 10 (b)). For example, when starting work in a certain field, planted grains are used to preliminarily divide the cutting work range. There are three types of cutting types, a middle split type (see FIG. 10 (c)), in which the stalk group cuts and runs so that the center portion is split. Then, the lateral cutting type and the middle splitting type are defined as other cutting types other than the above-mentioned line cutting type. In the above-mentioned cutting mode, one planting grain culm row of each row is introduced into each introduction path, whereas in the side cutting mode and the middle split mode,
As shown in FIG. 11 (b), cutting and running is performed while introducing two rows of planted grain culms into the route located on the most cut side.

In the introduction path L4 located on the most cutting side, two rows of planted grain culms are introduced along with the cutting operation of the machine, or only one row of planted grain culm is planted. A grain stalk detection sensor S1 is provided as a stem stalk presence / absence sensor that detects whether a grain stalk is introduced. As shown in FIG. 11, the grain stalk detection sensor S1 is provided with a switch-type sensor main body 30 in a state of being supported by a cutting frame 5f for supporting the weeding tool 5 positioned on the most cutting side, A sensor bar 31 that can swing back and forth around a vertical axis Y is pivotally supported on the sensor main body 30. The sensor bar 31 is held in a state of being oriented in the lateral width direction of the fuselage, and is swingably displaced rearward against a swing urging force of a spring (not shown). When done
It is configured to abut against the planted grain stem and swing backward against the swinging urging force, and when swinging backward more than a set amount, the output of the switch-type sensor body 30 is turned off. The state is switched to the ON state.

[0018] As shown in Fig. 11 (a), in the cutting mode, planted grain culms are introduced into each of the introduction paths, one by one.
The sensor bar 31 is configured not to come into contact with the planted grain culm to be introduced.
As shown in FIG. 11 (b), two stems and culms are introduced into the introduction path L4 located on the most mown side, and the sensor bar 31 is increased if there is one more stem culm. Swings rearward, the output of the sensor body 30 switches from the off state to the on state, and its presence is detected.

As shown in FIG. 3, the threshing apparatus 2 includes a handling chamber A for handling and processing the tip side of the harvested grain culm by a rotating rotating handling cylinder 15, and a handling chamber A for handling the grain culm supplied from the cutting apparatus 4. A feed chain 16 for feeding and transporting the wastewater, a cross flow fan 17 for discharging dust, and a sorting device B for sorting and processing the processed material after threshing. The sorting device B is a rocking sorting plate 19 that performs sorting while transporting the leaked material from the handling room A toward the rear of the machine, a toumi 18 that supplies a sorting wind to the rocking sorting plate 19, A first-item collecting section 20 and a second-item collecting section 21 for collecting sorted products are provided.

The grain culm supplied and transported to the handling room A by the feed chain 16 is threshed by the rotation of the handling drum 15. A receiving net 22 is provided in the lower part of the handling room A, and a single grain of the processed material after threshing leaks from the receiving net 22 to the swing sorting plate 19. Processed materials that could not be leaked from the receiving network 22
From the rear end part of the swing sorting plate 19. Swing sorting plate 1
Reference numeral 9 includes a Glen pan 23 located above the toy 18, a chaff sheave 24 located behind it, a Glen sheave 25 located below it, and the like. Each of the first material recovery unit 20 and the second material recovery unit 21 includes a screw conveyor, and kernels leaking from the grain sieve 25 are recovered by the first material recovery unit 20 and stored in a tank or the like. The mixture of the grains and the straw chips dropped from the rear end of the chaff sheave 24 or the rear end of the Glen sheave 25 is collected by the second collection part 21 and returned to the swing sorting plate 19.

A swing link 34 is provided on the rear side of the swing sorting plate 19.
The other end 34b is pivotally attached to the fixed frame side, and the intermediate portion 34c is pivotally attached to one end of the movable link 35a of the eccentric cam mechanism 35. On the other hand, bearings 36 are fixed to the left and right side plates on the front side of the swing sorting plate 19, and a pair of left and right U-shaped guides 37 slidably supporting the pair of left and right bearings 36 are provided on the fixed frame side. Have been. In such a structure, when the eccentric cam mechanism 35 is driven and rotated by a swing motor (not shown), the swing link 34 swings around the other end 34b as a fulcrum, and as a result, the swing sorting plate 19 swings. As a result, the processed material leaked from the handling room A is transferred toward the rear of the aircraft.

The chaff sheave 24 is, as shown in FIG.
It is composed of strip-shaped members a and a 'juxtaposed in the processing object transfer direction, and the interval t formed between adjacent strip-shaped members a and a' can be changed and adjusted freely. . This interval t corresponds to the leakage opening (chaff opening) of the processed material on the swing sorting plate 19. In addition, the upper end portion of one of the plurality of strip-shaped members a 'is externally fitted to the fulcrum shaft 38 passing through the left and right side plates 45,
Further, connecting pins 39 which pass through the elongated holes b formed in the side plate 45 are fixed to both ends on the lower end side of the strip-shaped member a '. The fulcrum shaft 38 and the connecting pin 3
9 is provided with a pair of left and right links 40 which are externally fitted to each other.
Is attached. Except for the one strip-shaped member a ', the other end portions on the lower end side of the other strip-shaped members a are linked plates 43 respectively.
, And the respective band-shaped members a and a 'are swung together with their upper ends serving as fulcrums, so that the distance t
Is configured to adjust.

A sheave motor M1 is provided as opening degree changing means for changing the leakage opening degree.
If you rotate while changing the rotation direction of 1 in the forward and reverse directions,
The operation arm 41 urged toward the closing side where the interval t is small by the spring 44 is oscillated by the gear type linkage mechanism 26, the oscillating arm 27, and the wire 28, thereby causing the leakage. The lower opening is changed to the large side or the small side. It should be noted that a potentiometer-type chaff opening sensor S2 for detecting the leakage opening from the rotation angle of the swing arm 27 is provided.

As shown in FIG. 3 and FIG.
9, a layer thickness sensor S3 as a processing object amount detecting means for detecting the amount of the processing object at a position on the upper side in the transfer direction of the processing object includes a rod 2 mounted on the upper side of the left and right side plates of the swing sorting plate 19.
9 and is disposed below the receiving net 22. The layer thickness sensor S3 converts the plate-shaped members T1 and T2 suspended swingably about the axis of the horizontal axis and the rotation angle of the plate-shaped members T1 and T2 to the rear (in the processing object transfer direction) into a resistance value. When the layer thickness of the processed object is small, the plate member T1 comes into contact with the processed object and rotates backward, and when the layer thickness becomes large, the plate member T2 comes into contact with the processed object. To rotate backwards. With this configuration, the rotation angle of the plate-like members T1 and T2 increases as the amount of the processing object increases and the layer thickness increases, so that the resistance value of the potentiometer PM (the voltage value corresponding to this) indicates the layer thickness of the processing object. That is, the amount of the processed material can be detected.

As shown in FIG. 6, a control device H composed of a microcomputer or the like is provided.
The detection information of each of the above-described threshing switch SW1, stock sensor S0, grain culm detection sensor S1, chaff opening degree sensor S2, and layer thickness sensor S3 is input. On the other hand, the control device H outputs a drive signal for the aforementioned sheave motor M1.

Threshing using the control device H to control the operation of the sheave motor M1 based on the detection information of the layer thickness sensor S3 so that the amount of material to be processed on the swing sorting plate 19 is in an appropriate state. The selection control means 100 is configured. Specifically, a target layer thickness of the processed material amount on the swing sorting plate 19 is set, and the sheave motor M1 is operated and feedback controlled so that the detection value of the layer thickness sensor S5 matches the target layer thickness. Explaining how to set this target layer thickness, a potentiometer type setting device 5
0 is set, and the operator sets the setting device 50 in consideration of crop conditions (grained state, wetness, etc.) in the row cutting mode.
Is changed to set the target layer thickness. The change characteristic of the set value of the target layer thickness with respect to the operation position of the setter 50 is configured to be changed based on the result of the determination of the cutting type as described later. Further, the actual operation amount of the sheave motor M1 is detected by the chief opening sensor S2, and the lower limit value (minimum opening) of the adjustment range when the opening of the chief sheave 24 is changed and adjusted by feedback control.
Is set.

Using the control device H, based on the detection information of the cereal culm detection sensor S1, the type of reaping of the planted cereal culm introduced into the introduction path of the reaper is changed in the traveling direction of the body. A reaping type determining means 101 is provided for determining whether the reaping type is arranged so as to form a row or a reaping type other than the reaping type. Specifically, the control device H determines that the aircraft is a unit distance (for example, about 1 unit).
7 cm) If the frequency at which the grain culm detection sensor is turned on while traveling is equal to or greater than the set value while traveling the set distance (3 m), it is determined that the other cutting mode is used, and if it is less than the set value. For example, it is configured to determine that it is in the form of a line cutting.

When it is determined that the cutting mode is the other cutting mode, the control device H sets the lower limit value of the adjustable range of the leakage opening degree of the swing sorting plate (chaff sheave) to a set value. The target layer thickness is changed and set to a value smaller than the target layer thickness set by the setter 50 while the target layer thickness is changed to a larger value.

Next, a specific control operation by the control device H will be described based on a flowchart. First, the reaping type determination processing will be described. As shown in FIG.
Every time the aircraft travels a unit distance (for example, about 17 cm), the ON counter is incremented if the time during which the cereal culm detection sensor S3 is on while traveling the unit distance is equal to or longer than a set time (40 msec). +1) is executed (steps 1, 2, 3). Each time the aircraft travels the set distance (3 m) for determination, if the count value of the ON counter exceeds “12”, that is, the frequency at which the grain stalk detection sensor S3 is turned on is equal to or greater than the set value. If the count value does not exceed "12", it is determined that the cutting format is the "other cutting format" (horizontal cutting format or middle split format) (steps 4, 5, and 6). Is determined to be a "row cutting style" (step 7), and
The count value of the counter is cleared to "0" (step 8). Note that the travel distance of the aircraft can be obtained by calculation based on the detection value of the vehicle speed sensor at that time and the time measured by the timer.

Next, the threshing sorting control will be described. FIG.
As shown in FIG.
Is turned on to satisfy the start condition (step 9), and if the cutting type is the line cutting type, a target value for the line cutting is set according to the determination result of the cutting type,
The lower limit of the adjustable range of the leakage opening of the chaff sheave is set to a standard value (steps 10, 11, and 12). That is,
The change characteristic of the set value of the target layer thickness with respect to the operation position of the setting device 50 is set to the characteristic as shown by the line L1 in FIG.
The target value of the layer thickness corresponding to the operation position of the operation device 50 at that time is set.

If the cutting mode is the other cutting mode, a target value for the other cutting mode is set, and the lower limit value of the adjustable range of the leak opening of the chaff sheave 24 is set to a value larger than the standard value. (Steps 13 and 1)
4). That is, the change characteristic of the set value of the target layer thickness with respect to the operation position of the setting device 50 is compared with the characteristic shown by the line L2 in FIG. 9, that is, the value set based on the characteristic for cutting. Even when the operation position of the setting device 50 is the same, a change characteristic is set such that the layer thickness becomes a value smaller than the set amount, and the target value of the layer thickness corresponding to the operation position of the operation device 50 at that time is determined from the change characteristic. Is set. In addition, the lower limit of the adjustable range when adjusting the leak opening of the chaff sheave 24 is regulated to a value larger than the standard value.

Then, the sheave motor M1 is controlled by feedback control so that the detection layer thickness detected by the layer thickness sensor S3 becomes the target layer thickness set as described above.
Is controlled (step 15). Specifically, if the detection layer thickness is larger than the target layer thickness, the sheave motor M is adjusted to change and adjust the leakage opening to the larger side by the set unit amount.
If the detection layer thickness is larger than the target layer thickness even after the lapse of a predetermined time, the operation of changing the leakage opening to the larger side by the set unit amount is repeated. Conversely, if the detection layer thickness is smaller than the target layer thickness, the operation of changing and adjusting the leakage opening degree to the smaller side by the set unit amount is repeated every predetermined time.
At this time, the actual operation amount of the sheave motor M1 is detected by the chaff opening sensor S2, and based on this detection information,
The leakage opening of the chaff sheave 24 is regulated so as not to fall below the lower limit. As a result, in the case of the other cutting type, as soon as the cutting operation is started, the leakage opening degree of the chaff sheave 24 tends to be open as compared with the case of the row cutting type, and the sorting capacity is increased. The setting will be changed.

[Other Embodiments] (1) In the above-described embodiment, the cereal stalk detection sensor S provided in the introduction path L4 on the most recently cut side is used as the cutting type discriminating means.
Although the configuration is such that the cutting type is determined based on the detection information of No. 3, the present invention is not limited to such a configuration. For example, a configuration in which the determination is performed based on information manually set by the operator prior to work traveling, or the like. , May be implemented in various forms.

(2) In the above embodiment, the layer thickness detecting means is constituted by an oscillating contact type sensor. However, the present invention is not limited to such a constitution. For example, a constitution in which the layer thickness is detected by an optical sensor or the like. Alternatively, the present invention may be implemented in various forms, such as a configuration in which the amount of the processed material is detected based on the weight.

[Brief description of the drawings]

FIG. 1 is a side view of a combine.

FIG. 2 Transmission system diagram

FIG. 3 is a schematic configuration diagram of a threshing apparatus.

FIG. 4 is a side view of a layer thickness sensor.

FIG. 5 is a diagram showing a configuration for adjusting the opening of a chaff sheave.

FIG. 6 is a control block diagram.

FIG. 7 is a flowchart of a control operation;

FIG. 8 is a flowchart of a control operation.

FIG. 9 is a graph showing a change characteristic of a target layer thickness.

FIG. 10 is a diagram showing a cutting format.

FIG. 11 is a diagram showing a cereal stalk introduction state;

[Explanation of symbols]

 2 Threshing unit 4 Cutting unit 19 Swing sorting plate 100 Threshing sorting control means 101 Cutting type discriminating means A Handling room B Sorting device S1 Stem stalk presence / absence sensor S3 Layer thickness detecting means

 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 2B095 AA01 AA02 AA07 AA12 BA03 BA11 BA21 BA25 BA30 BA35 BB29 CA02 EA02 GA02 GA03 GA09 GA17 GA18 GB03 GB10

Claims (3)

[Claims] 1. A sorting apparatus comprising a swing sorting plate for sorting and separating a processed material leaking from a handling chamber in a threshing unit by swinging motion, and an intermediate point in the swinging transfer direction on the swing sorting plate. A layer thickness detecting means for detecting the layer thickness of the processed material in
Threshing / sorting control means for performing threshing control for changing and adjusting the leak opening of the oscillating sorting plate so that the layer thickness of the processing object detected by the layer thickness detecting means becomes the set target layer thickness. Is provided, wherein the stalk culm to be introduced into the plurality of stalk culm introduction paths of the cutting unit forms a row in the traveling direction of the airframe, and the respective stalk culm introduction paths. A cutting type discriminating means is provided for discriminating whether the stem culm is introduced one by one in each row or a cutting mode other than the cutting mode, and the threshing / sorting control means includes: Based on the information of the cutting type determination means, when the cutting type is determined to be the other cutting type, a value smaller than the set target layer thickness by a set amount is set as the target layer thickness and the threshing is performed. Combine configured to perform control 2. The threshing / sorting control means is configured to change and adjust an adjustment range of a leak opening degree of the swinging / sorting plate in a range larger than a set lower limit value. 2. The combine according to claim 1, wherein, when it is determined that the cutting mode is the other cutting mode, the lower limit value of the adjustable range is changed to a larger value. 3. A stalk in which the number of stalk / culm rows to be introduced is increased by one line when the cutting mode is the other cutting mode, as compared with the case of the row cutting mode. In the culm introduction route, a stalk culm presence / absence sensor for detecting the presence / absence of stalk culm of the stalk culm row is provided, and the cutting type determination means is configured to determine the reaping type based on the detection information of the stalk culm presence sensor. The combine according to claim 1 or 2, wherein the combine is determined.