JP6482907B2 - Threshing device - Google Patents

Description

  The present invention relates to a threshing apparatus such as a combine equipped with automatic fin control means for automatically controlling the fin opening of a chaff sheave.

  There is known a threshing apparatus provided with an automatic fin control means for automatically controlling the fin opening of the chaff sheave. This type of threshing device is provided with processing status detection means for detecting the processing status of the swinging sorter, and improves the sorting accuracy by automatically controlling the fin opening of the chaff sheave based on the detection result of the processing status detection means. ing.

  Layer thickness sensors are widely used as processing status detection means. The layer thickness sensor is usually configured to include a contact-type detection body that rotates according to the layer thickness of the workpiece, and a potentiometer that detects the rotation position of the detection body connected via a rotation shaft. It is arranged above the rocking sorter and detects the layer thickness of the processed material.

  For example, the threshing apparatus shown in Patent Documents 1 and 2 includes two layer thickness sensors on the upper end portion of the oscillating flow plate and the upper end side of the chaff sheave, and the threshing apparatus shown in Patent Document 3 is a chaff sheave. Two layer thickness sensors are provided above the start end and above the end.

Japanese Patent No. 2694087 Japanese Patent No. 2721079 Japanese Patent No. 2721078

  In the threshing devices disclosed in Patent Documents 1 and 2, the change rate of the layer thickness or the second reduction rate is calculated based on the detection values of the two layer thickness sensors, and the fin opening of the chaff sheave is automatically calculated based on the calculated value. Although it is controlled, the layer thickness of the processed material at the end portion of the chaff sheave is not detected, so that there is a possibility that the processed material overflows from the end portion of the chaff sheave according to a rapid change in the amount of processed material.

  On the other hand, the threshing device shown in Patent Document 3 includes layer thickness sensors above the start end and above the end of the chaff sheave, but the rear layer thickness sensor is provided for alarm output, and the fin of the chaff sheave Since there is no effect on the opening, there is room for improvement regarding the accuracy of fin automatic control. In particular, in general-purpose combiners where the cut stalks are thrown into the threshing section, the percentage of swarf in the processed material is high, so high-precision fin automatic control is required to suppress the swarf falling from the chaff sheave. It has been.

The present invention was created with the object of solving these problems in view of the above-mentioned circumstances, and the invention of claim 1 shakes the processed material leaked from the handling chamber through the receiving network. An oscillating sorter that performs dynamic sorting, an oscillating flow plate that is provided on the starting end side of the oscillating sorter, a chaff sheave that is provided on the oscillating sorter and that sifts the processed material downstream of the oscillating flow plate, An automatic fin control means for automatically controlling the fin opening of the chaff sheave and a processing status detection means for detecting the processing status of the swing sorter, the processing status detection means being located above the end of the swing flow plate or the chaff sheave A front side layer thickness sensor that is disposed above the start end of the workpiece and detects the layer thickness of the processed product, and a rear side layer thickness sensor that is disposed above the end portion of the chaff sheave and detects the layer thickness of the processed product. Automatic control means are used for the front layer thickness sensor and the rear layer thickness sensor. Based on detection value, the opening operation of opening the fins opening and closing operation to close the fin opening, and status quo operation for maintaining the current state of the fin opening, a chaff sieve fin opening selectively running In addition to automatic control, the fin opening automatic control by the fin automatic control means is such that the detection value of the rear layer thickness sensor is smaller than the predetermined range so that the detection value of the rear layer thickness sensor falls within the predetermined range. In this case, a closing operation is selected and executed.In the case of a predetermined range, a current state maintaining operation is selected and executed, and when it is larger than the predetermined range, an opening operation is selected and executed. Even if the detection value of the side layer thickness sensor is smaller than the predetermined range, the opening operation or the current state maintaining operation is selected and executed according to the detection value of the front layer thickness sensor, and the detection value of the rear layer thickness sensor is within the predetermined range. Even according to the detection value of the front layer thickness sensor Exception control that selects and executes the opening or closing operation and selects the current maintenance operation according to the detection value of the front layer thickness sensor even if the detection value of the rear layer thickness sensor is larger than the predetermined range And .
According to a second aspect of the invention, the threshing apparatus according to claim 1, wherein the fin automatic control means, the operating speed when closing fin opening, that faster than the operation speed when opening the fins opening It shall be the feature.

According to the first aspect of the present invention, the front layer thickness sensor that is disposed above the end portion of the oscillating flow plate or the start end portion of the chaff sheave and detects the layer thickness of the processed material, and disposed above the end portion of the chaff sheave. Since the fin opening of the chaff sheave is automatically controlled based on the detection value with the rear layer thickness sensor that detects the layer thickness of the processed material, it is possible to realize highly accurate fin automatic control while preventing the overflow of the processed material it can.
According to the second aspect of the present invention, since the fin opening of the chaff sheave is automatically controlled based on the detection value of the rear layer thickness sensor, efficient sorting using the entire surface of the chaff sheave becomes possible. In addition, since an exceptional situation is judged based on the detection values of the front layer thickness sensor and the rear layer thickness sensor and an operation suitable for the situation is selected, it is possible to prevent a reduction in sorting accuracy due to the exceptional situation. Can do.
According to the invention of claim 3, since the operating speed when closing the fin opening is made faster than the operating speed when opening the fin opening, a delay in the closing operation of the fin opening is prevented, and Mixing can be suppressed.

It is a left view of a combine. It is a left view of the threshing part which shows the 2nd reduction | restoration path | route. It is a left view of the threshing part which shows arrangement | positioning of a layer thickness sensor. It is a principal part top view of the threshing part which shows arrangement | positioning of a layer thickness sensor. It is a principal part front view of the threshing part which shows arrangement | positioning of a layer thickness sensor. It is a principal part front view of the threshing part which shows a treatment room return state. It is a principal part front view of the threshing part which shows a sorting room reduction | restoration state. It is a right rear perspective view which shows the attachment state of a layer thickness sensor. It is a right view which shows the attachment state of a layer thickness sensor. (A) is a right front perspective view of a layer thickness sensor showing a cover body mounting state, and (B) is a right front perspective view of a layer thickness sensor showing a cover body removal state. It is a block diagram which shows the input / output of a control part. It is a flowchart of selection control. It is a flowchart of fin automatic control. It is a fin operation | movement table | surface which shows the fin operation | movement by fin automatic control. It is a flowchart of fin manual control.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, 1 is a general-purpose combiner, and the general-purpose combine 1 includes a harvesting unit 2 that harvests stem stalks, and a threshing unit (threshing device) 3 that threshs and sorts grains from stems and straws that are put into whole straws. A grain tank 4 for storing the selected grains, a discharge auger 5 for discharging the grains in the grain tank 4 to the outside of the machine, a discharge unit 6 for discharging threshed waste, etc. A driving unit 7 on which a person gets on and a crawler type traveling unit 8 are provided.

  The cutting unit 2 includes a header 9 that is connected to the front end of the machine body so as to be able to move up and down, a divider 10 that weeds uncut stems at the front end of the header 9, and a cutting blade (not shown) that cuts off the uncut stems. ), A reel 11 for picking up uncut stems and cut stems, an auger 12 for collecting the scraped stems at predetermined positions in the width direction, and a threshing unit 3 for collecting stems collected by the auger 12 And a feeder 13 that feeds the whole grain into the threshing unit 3.

  As shown in FIGS. 2 and 7, the threshing unit 3 sorts out the treatment chamber 14 into which the whole cutting stalks are put and the treatment material that is disposed below the treatment chamber 14 and has leaked from the treatment chamber 14. The sorting room 15 is provided, and the grain sorted in the sorting room 15 is transferred to the grain tank 4 through the first cerealing device 16.

  The handling chamber 14 rotates around a rotating shaft 17a along the front-rear direction, and is disposed along a lower outer circumference of the handling cylinder 17 that hooks and rotates a stem with a handling tooth 17b that protrudes from the outer circumference. The receiving net 18 having a circular arc when viewed from the front and leaking the processed product that has been shed by rubbing with the stem and the waste that has reached the end of the handling chamber 14 without leaking from the receiving net 18 is discharged. It is provided with a dust mouth 19.

  The sorting chamber 15 collects the first thing, the swinging sorter 20 that sorts the processed material leaked from the receiving net 18 while transporting it, the red pepper 21 that generates the sorting wind in front of the swinging sorter 20, and the like. The first horizontal spiral 22 and the second horizontal spiral 23 for recovering the second thing. The first thing recovered by the first horizontal spiral 22 is the grain through the first cerealing device 16. The second product transferred to the tank 4 and collected by the second horizontal spiral 23 is returned to the handling chamber 14 or the sorting chamber 15 (on the swinging sorter 20) via the second reducing device 24.

  The second reduction device 24 of the present embodiment includes a second vertical transport unit 25 including a slat conveyor that transports the second product collected by the second horizontal spiral 23 upward from the right end of the second horizontal spiral 23, and a handling chamber. 14 is arranged along the right side of 14 and is configured to include a second lateral transport unit 26 made of a spiral transporter that transports forward the second transported to the upper end of the second vertical transport unit 25. The second object conveyed to the front end portion of the second horizontal conveyance unit 26 is returned to the start end side of the treatment chamber 14 from the treatment chamber second return port 27 provided at the front end portion of the second horizontal conveyance unit 26. .

  In addition, a detachable cage 28 is provided near the rear of the second chamber 27 in the second lateral transfer section 26. When this cage 28 is removed, the portion opened by the removal is selected as the second sorting port. It becomes the reducing port 29. That is, in a state where the basket 28 is removed, the second item conveyed to the front end side of the second lateral conveying unit 26 falls from the sorting second reduction port 29 and is formed below the sorting second reduction port 29. It is reduced onto the rocking sorter 20 through the second drop passage 30. The sorting second reduction port 29 is arranged on the right side of the front end side of the swinging sorter 20 (one side on the start end side) in plan view. Therefore, the second product is reduced and biased to the right side on the front end side of the swinging sorter 20.

  As shown in FIGS. 2 and 3, the oscillating sorter 20 includes an oscillating flow plate 31 that sequentially transfers the processed material leaked from the receiving net 18 to the rear, and a grain behind the oscillating flow plate 31. Chaff sieve 32 for sieving, grain sieve 33 for further sieving the grains that have leaked from the chaff sheave 32, an extended chaff sheave 34 that is selectively mounted behind the chaff sheave 32 or the glen sieve 33, and the rear of the chaff sheave 32 or the glen sieve 33 And a stroking assembly 35 that is selectively mounted on the back and forth, and is reciprocally swung continuously at a predetermined cycle by a swinging mechanism (not shown).

  The chaff sheave 32 includes a plurality of fins 32a arranged in parallel at a predetermined interval in the front-rear direction. Each fin 32a is inclined in a front-rear and rear-high state, and the processed material is leaked from the gaps between the fins 32a while the processed material is transferred rearward as the swinging sorter 20 swings. The treated product leaked here is collected as the first product through the Glen sieve 33, and the treated product that has not leaked is collected as the second product.

  Each fin 32a is configured to be able to rotate back and forth with the upper end side as a fulcrum, and is connected to a fin drive motor 36 (see FIG. 11) via a cam mechanism (not shown). The gap (fin opening) between the fins 32a in the chaff sheave 32 can be changed based on the change in the angle of each fin 32a according to the driving. And it becomes possible to perform a highly accurate sorting process by executing fin automatic control that automatically increases or decreases the fin opening according to the amount (layer thickness) of the processed material.

  The swing sorter 20 is provided with a plurality of gathering plates 37 to 40 for bringing a processed product to the center in the left-right width direction. In the present embodiment, four approach plates 37R to 40R extending obliquely rearward (obliquely downstream side) from the right side portion of the rocking sorter 20 toward the central portion, and the left side portion of the rocking sorter 20 to the central portion. And four approach plates 37L to 40L that extend obliquely rearward (obliquely downstream).

  The left and right first alignment plates 37R and 37L arranged on the foremost side are formed wider than the other alignment plates 38R to 40R and 38L to 40L, and their base ends are intermediate in the front-rear direction of the oscillating flow plate 31. The tip that is positioned in the section and extends obliquely rearward from here reaches the rear end of the oscillating flow plate 31.

  The right first alignment plate 37R located on the side of the sorting second reduction port 29 in plan view has a base end located in the center in the front-rear direction of the sorting second reduction port 29 in plan view. The second reduced product reduced from the first is guided to the left and right center side of the swinging sorter 20 and merged with the receiving net leakage that leaks from above.

  Further, the right first alignment plate 37R of the present embodiment is provided with an adjustment plate 41 that allows the height to be adjusted. The adjustment plate 41 has a pair of left and right elongated holes 41a that are long in the vertical direction, and is attached to the right first alignment plate 37R via a bolt 41b that passes through the elongated hole 41a. That is, by adjusting the height of the right first alignment plate 37R by loosening the bolt 41b and sliding the adjustment plate 41 up and down. When reducing the second product onto the rocking sorter 20, the second reduced product gets over the right first alignment plate 37R by increasing the height of the right first alignment plate 37R. It is possible to reliably guide the second reduced product to the left and right center side of the rocking sorter 20.

  The left and right second alignment plates 38R and 38L arranged at predetermined intervals behind the first alignment plates 37R and 37L are located at the rear ends of the oscillating flow plates 31 and from here The tip that extends obliquely rearward reaches the front end of the chaff sheave 32. The right side second alignment plate 38R located on the side of the sorting second reduction port 29 in plan view has a base end located at the rear end in the front-rear direction of the selection number two reduction port 29 in plan view, so Similar to the plate 37R, the second reduced product reduced from the second selection reducing port 29 is guided to the left and right center side of the swinging sorter 20.

  The left and right third alignment plates 39R, 39L disposed at a predetermined interval behind the second alignment plates 38R, 38L, and the left and right fourth alignment plates disposed at a predetermined interval behind them. 40R and 40L have their base ends and distal ends positioned on the chaff sheave 32, and guide a processed product biased to the left and right ends of the chaff sheave 32 toward the center.

  As shown in FIG. 7, an opening 42a for maintenance that can be opened and closed by a cover body 42 is formed on the outer surface of the handling chamber 14, and when the cover body 42 is opened, the opening 42a is interposed. Thus, it is possible to perform maintenance work such as attachment / detachment of the receiving net 18 and the eaves 28 and adjustment of the height of the first right side plate 37R. Further, as shown in FIG. 8, the handling chamber 14 is provided with a receiving net support frame 43 for detachably supporting the receiving net 18. The receiving net support frame 43 according to the present embodiment is integrated with a square pipe-shaped receiving net support frame 46 laid between the front side plate 44 and the rear side plate 45 of the handling chamber 14 and an intermediate portion of the receiving net support frame 46. And a net-supporting support member 47 having a circular arc when viewed from the front.

  Next, the layer thickness sensor 48 for detecting the layer thickness of the processed material on the rocking sorter 20 and the arrangement thereof will be described with reference to FIGS.

  As shown in FIGS. 2 to 10, a layer thickness sensor 48 for detecting the layer thickness of the processed material on the rocking sorter 20 is provided above the rocking sorter 20. The layer thickness sensor 48 includes a detection body 49 that freely rotates in accordance with the layer thickness of the processing object, a potentiometer 51 that detects a rotation position of the detection body 49 connected via the rotation shaft 50, and a detection body 49. Is detected by the potentiometer 51 when the detection body 49 contacts the workpiece and rotates according to the layer thickness. Based on this, it becomes possible to specify the layer thickness of the processed product. Incidentally, the detection body 49 of the present embodiment is arranged such that a drooping posture slightly receding from the vertical is an initial posture, and the receding angle increases as the layer thickness of the processed material increases. It should be noted that the detection body 49 of the present embodiment can be held in the storage position that is flipped upward in a harvesting operation that does not require automatic fin control.

  In the present embodiment, the layer thickness sensor 48 is attached using the receiving net support frame 46 located above the rocking sorter 20 and at the center in the left-right width direction of the rocking sorter 20 in plan view. . As the layer thickness sensor 48, a front layer thickness sensor 48F and a rear layer thickness sensor 48R are provided, and the arrangement thereof will be described later.

  The material of the detection body 49 of the layer thickness sensor 48 can be arbitrarily selected as long as it is in contact with the object to be processed and rotates according to the layer thickness. For example, the detection body 49 of the present embodiment is formed of a relatively hard material, but the detection body 49 can also be formed of an elastically deformable spring material or a soft resin material. Further, it is possible to prevent the detection body 49 from being plastically deformed or damaged due to catching of branches or the like included in the processed material.

  As the potentiometer 51, there are a spring built-in type with a built-in spring for urging the rotating shaft 50 in a predetermined direction, a springless type without a built-in spring, and the like. Any type can be selected. And the potentiometer 51 is electrically connected to the control part 52 mentioned later via the sensor wiring 51a.

  The potentiometer 51 is attached to the receiving network support frame 46 via an attachment bracket 53 and is covered with a protective cover 54 that is detachably provided on the attachment bracket 53. According to such a protective cover 54, it is possible to reliably reduce the occurrence of troubles such as sawdust being caught on the potentiometer 41. Further, by removing the protective cover 54, the attachment position of the potentiometer 51 can be easily adjusted.

  The front-side layer thickness sensor 48F is located on the right side adjacent to the sorting second reducing port 29 in plan view among the plurality of approach plates 37R to 40R and 37L to 40L above the central portion in the left-right width direction of the swing sorting body 20. It arrange | positions on the extended line of the 1st gathering board 37R. According to such an arrangement, the layer thickness of the treated product can be detected at the junction of the receiving net leakage and the second reduced product, and therefore on the rocking sorter 20 regardless of the presence or amount of the second reduced product. It is possible to stably detect the amount of processed material.

  In addition, since the right side second plate 38R is also adjacent to the selection second reducing port 29 in a plan view, the front layer thickness sensor 48F can be disposed on the extension line of the right side second plate 38R. It is desirable to be on the extension line of the right first plate 37R. The reason is that the right first plate 37R is located on the most upstream side among the plurality of plate 37R, 38R adjacent to the sorting second reduction port 29 in plan view, and the amount of processed material sent to the chaff sheave 32 Is detected at an early stage, and can be reflected in the automatic fin fin control of the chaff sheave 32. Further, the right-side first alignment plate 37R of the present embodiment is wider than the right-side second alignment plate 38R, In addition, the height can be adjusted, and the second reduced product can be more reliably guided to the center side of the rocking sorter 20. The front layer thickness sensor 48F of the present embodiment is located above the front end portion (above the start end portion) of the chaff sheave 32, but may be located above the oscillating flow plate 31.

  On the other hand, the rear layer thickness sensor 48R is disposed above the center part in the left-right width direction of the swinging sorter 20 and above the rear end part (above the terminal part) of the chaff sheave 32. This position can directly detect an overflow in the chaff sheave 32, and by performing automatic fin fin control of the chaff sheave 32 based on the layer thickness at this position, it is efficient to use the entire surface of the chaff sheave 32. Sorting can be performed.

  Furthermore, the front side layer thickness sensor 48F and the rear side layer thickness sensor 48R of the present embodiment are offset above the center of the swinging sorter 20 in the left-right width direction and to the sorting second reduction port 29 side in plan view. Be placed. In this way, it is possible to accurately detect the layer thickness of the processed material on the second reducing port 29 side where the amount of processed material is large.

  Next, sorting control by the control unit 52 will be described with reference to FIGS.

  The control unit 52 is configured by using a microcomputer or the like, and on its input side, in addition to the front layer thickness sensor 48F and the rear layer thickness sensor 48R described above, threshing for determining whether the threshing clutch is turned on or off. Switch operation switch 60, handling cylinder rotation detection sensor 61 for detecting the rotation speed of the handling cylinder 17, grounding sensor potentiometer 62 for detecting the height of the cutting unit 2 to the ground, sensitivity setting tool for automatic sorting control (fin automatic control), top The lower limit setting tool, the selection dial 63 that is also used as an ON / OFF operation tool, the fin opening potentiometer 64 that detects the fin opening of the chaff sheave 32, and the like are connected to the output side of the control unit 52. In addition to the fin drive motor 36, a horn and a monitor as the notification means 65 are provided.

  The control unit 52 executes the sorting control shown in FIG. 12, the automatic fin control shown in FIG. 13 and the manual fin control shown in FIG. .

  In the selection control, first, it is determined whether the threshing clutch is on / off (S11). If the determination result is off, the process returns to the upper routine as it is, whereas if the determination result is on, the layer thickness sensors 48F, 48R. Based on the detected value, it is determined whether the detection body 49 of the layer thickness sensors 48F, 48R is the detection position or the storage position (S12). If the determination result is the storage position, the fin manual control as a subroutine is executed (S13). If the determination result is the detection position, is the crop (rice / wheat) requiring fin automatic control? It is determined whether or not (S14). This crop discrimination is performed by detecting the adjustment state of the crop-specific adjustment element in the general combine 1. For example, it is determined whether the barrel rotation speed is high (rice / wheat) or low (other), or automatic cutting height control based on the detection value of the ground sensor potentiometer 62 is not executed (rice / wheat) or executed. It is determined by (Other). If it is determined that the crop is other than rice / wheat, the fin manual control is executed (S13). If it is determined that the crop is rice / wheat, ON / OFF of the automatic sorting control is further performed. Determination is made (S15), and fin automatic control is executed when this determination result is ON (S16), and fin manual control is executed when it is OFF (S13).

  In the fin automatic control, first, after inputting the dial value of the selection dial 63 (S21), based on the dial value, the minimum opening and the maximum opening of the fin opening, the judgment values of the layer thickness sensors 48F and 48R ( The detection value range) is determined (S22). Next, the detection values of the front layer thickness sensor 48F and the rear layer thickness sensor 48R are input (S23), and the fin operation is determined based on the detection values and the fin operation table shown in FIG. 14 (S24). Thereafter, the current fin opening K1 is detected (S25), the target fin opening K2 is determined (S26), and the fin opening K1 and the fin opening K2 are compared (S27). If the comparison result is “K1 = K2”, the fin drive motor 36 is stopped (S28). If the comparison result is “K1> K2,” the fin drive motor 36 is moved to the closing side ( S29), the interval timer T1 is counted (S30). If the comparison result is “K1 <K2,” the fin drive motor 36 is moved to the open side (S31), and then the interval timer T2 is counted (S32). . The interval timers T1 and T2 are delay timers for defining the opening / closing operation speed of the fin 32a. By setting T1 <T2, the operation speed when closing the fin opening is changed to the operation when opening the fin opening. It is faster than the speed. Next, the detection values of the layer thickness sensors 48F and 48R are compared with the alarm determination value (S33). If this determination result is less than the alarm determination value, the process returns to the upper routine as it is, but the determination result is the alarm determination value. When it is above, the present fin opening degree is judged (S34). If it is determined that the fin opening is equal to or greater than the maximum opening, it is determined that some abnormality has occurred, and the notification means 65 is activated (S35).

  As shown in FIG. 14, in the fin automatic control, based on the detection values of the front layer thickness sensor 48F and the rear layer thickness sensor 48R, the opening operation for opening the fin opening of the chaff sheave 32 and the fin opening of the chaff sheave 32 are set. In selectively performing the closing and closing operation and the current maintaining operation for maintaining the current fin opening of the chaff sheave 32, the opening operation is performed so that the detection value of the rear layer thickness sensor 48R falls within a predetermined range. Basic control for selectively executing either the closing operation or the current state maintaining operation and the detection value range of the front layer thickness sensor 48F and the detection value range of the rear layer thickness sensor 48R are a predetermined combination. And exception control for selectively executing different operations. In other words, since the fin opening of the chaff sheave 32 is automatically controlled based on the detection value of the rear layer thickness sensor 48R, efficient sorting using the entire surface of the chaff sheave is possible. In addition, an exceptional situation is judged based on the detection values of the front layer thickness sensor 48F and the rear layer thickness sensor 48R, and an operation suitable for the situation is selected, thereby preventing a reduction in sorting accuracy due to the exceptional situation. It becomes possible to do.

  More specifically, the detection value of the front layer thickness sensor 48F is divided into five detection value ranges (maximum, large, medium, small, and none), and the detection value of the rear layer thickness sensor 48R is divided into four detection values. It is divided into ranges (large, medium, small, and none), and an opening operation, a closing operation, and a status quo are set for each combination. Then, in order to efficiently select the entire surface of the chaff sheave, the opening / closing control of the fins 32a is performed so that the detection value of the rear layer thickness sensor 48R falls within a predetermined range (ideally, a “small” range).

  For example, when the detection value of the rear layer thickness sensor 48R is in the range of “None”, the fin 32a is closed (basic control). However, when there is a maximum supply on the front side of the chaff sheave 32, the fin 32a is opened to prevent grain loss due to overflow (exception control).

  Further, when the detection value of the rear layer thickness sensor 48R is in the “small” range, the fin opening degree is maintained as it is (basic control). However, if the layer thickness on the front side of the chaff sheave 32 is too large or too small, the fin opening is opened and closed according to the layer thickness (exception control).

  Further, when the detection value of the rear layer thickness sensor 48R is in the “medium” range, there is a possibility of grain loss due to overflow, so the fin 32a is opened (basic control). However, when there is no layer thickness on the front side of the chaff sheave 32, the fin opening is maintained because there is no supply of the processed material (exception control).

  Further, when the detection value of the rear layer thickness sensor 48R is in the “large” range, the possibility of grain loss due to overflow increases, so the fins 32a are always opened (basic control).

  In the fin manual control, first, after inputting the dial value of the selection dial 63 (S41), the target fin opening K3 is determined based on the dial value (S42). Next, the current fin opening K1 is detected (S43), and the fin opening K1 and the fin opening K3 are compared (S44). If the comparison result is “K1 = K3”, the fin drive motor 36 is stopped (S45), and if the comparison result is “K1> K3”, the fin drive motor 36 is moved to the closing side (S46). ) If the comparison result is “K1 <K3”, the fin drive motor 36 is moved to the open side (S47). Thereafter, the detection values of the layer thickness sensors 48F and 48R are compared with the alarm determination value (S48). If this determination result is less than the alarm determination value, the process returns to the upper routine as it is, but the determination result is equal to or greater than the alarm determination value. If it is, it is determined that some abnormality has occurred, and the notification means 65 is activated (S49).

  According to the present embodiment configured as described, the front layer thickness sensor 48F that is disposed above the end portion of the oscillating flow plate 31 or the top end portion of the chaff sheave 32 and detects the layer thickness of the processed material, and the chaff sheave 32 Since the fin opening of the chaff sheave 32 is automatically controlled based on the detection value of the rear layer thickness sensor 48R that is disposed above the terminal portion of the workpiece and detects the layer thickness of the workpiece, it is possible to prevent the overflow of the workpiece. Accurate fin automatic control can be realized.

  Further, since the fin opening degree of the chaff sheave 32 is automatically controlled based on the detection value of the rear layer thickness sensor 48R, efficient sorting using the entire surface of the chaff sheave becomes possible. In addition, an exceptional situation is judged based on the detection values of the front layer thickness sensor 48F and the rear layer thickness sensor 48R, and an operation suitable for the situation is selected, thereby preventing a reduction in sorting accuracy due to the exceptional situation. can do.

  In addition, since the operating speed when closing the fin opening is higher than the operating speed when opening the fin opening, it is possible to prevent the closing operation of the fin opening from being delayed and to suppress the mixing of sawdust. .

  Needless to say, the present invention is not limited to the embodiment. For example, although the said embodiment is a general purpose combine, it can also be implemented also with a self-removal combine.

DESCRIPTION OF SYMBOLS 1 Combine 3 Threshing part 14 Handling chamber 17 Handling cylinder 18 Receiving net | network 20 Oscillating sorting body 29 Sorting 2nd reduction | restoration port 31 Oscillating flow board 32 Chaff sheave 32a Fin 37-40 Approaching plate 37R Right side 1st approaching plate 48F Front side layer thickness sensor 52 Control unit

Claims (2)

An oscillating sorter for oscillating and sorting the processed material leaked from the handling chamber via the receiving net;
An oscillating flow plate provided on the start side of the oscillating sorter;
A chaff sheave that is provided on the swing sorter and sieves the processed material downstream of the swing flow plate;
Fin automatic control means for automatically controlling the opening of the chaff sheave,
Processing status detection means for detecting the processing status of the swing sorter, and
The processing status detection means
A front layer thickness sensor that is disposed above the end portion of the oscillating flow plate or above the start end portion of the chaff sheave and detects the layer thickness of the processed material;
A rear layer thickness sensor disposed above the end of the chaff sheave to detect the layer thickness of the workpiece,
The fin automatic control means
Based on the detection values of the front layer thickness sensor and rear layer thickness sensor, the opening operation to open the fin opening, the closing operation to close the fin opening, and the current maintenance operation to maintain the current fin opening are selected. And automatically control the fin opening of the chaff sheave ,
Automatic fin opening control by the fin automatic control means,
When the detection value of the rear layer thickness sensor is smaller than the predetermined range, the closing operation is selected and executed so that the detection value of the rear layer thickness sensor falls within the predetermined range. Basic control for selecting and executing the current state maintaining operation, and selecting and executing the opening operation when larger than a predetermined range;
Even if the detection value of the rear layer thickness sensor is smaller than the predetermined range, the opening operation or the current maintenance operation is selected and executed according to the detection value of the front layer thickness sensor, and the detection value of the rear layer thickness sensor is predetermined. Even if it is within the range, the opening operation or the closing operation is selected and executed according to the detection value of the front layer thickness sensor, and even if the detection value of the rear layer thickness sensor is larger than the predetermined range, the detection value of the front layer thickness sensor A threshing apparatus comprising: an exception control that selects and executes a current state maintaining operation according to the current state . The fin automatic control means, threshing apparatus according to the operating speed when closing fin opening, to claim 1 you characterized by faster than the operation speed when opening the fins opening.