JP3392327B2 - Threshing machine - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention belongs to the technical field of a thresher mounted on a combine, a harvester and the like.

[0002]

2. Description of the Related Art Generally, in this type of thresher, an object to be treated which has leaked from a net in a handling room is filtered by a filtering / sorting section (chaff sheave, grain sieve, etc.) provided at the end of a rocking flow plate. At the same time as sorting, the processed material leaking from the filtering and sorting section is further selected by the sorting wind of the Karano fan, and the selected grains are stored in the grain tank via the first helix and the fried helix. When the processing capacity of the filtration / sorting unit is constant, variation in the sorting accuracy is not allowed due to the increase / decrease of the object to be treated, and so-called overflow may occur to increase the number of scattered particles. It was

[0003]

Therefore, the layer thickness detection sensor (float sensor) detects the layer thickness of the object to be processed laminated on the oscillating flow plate, and the sorting processing capability (filtration It has been proposed to automatically control the degree of opening of the sorting section). However, the layer thickness detection sensor has a position (the central part of the oscillating flow plate) which is directly contacted with an object to be processed falling from the handling chamber.
Therefore, it is difficult to accurately detect the amount of the object to be processed, and as a result, the processing capacity may not match the actual processing situation.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances in order to solve these problems, and provides a selecting unit for selecting an object to be processed with a selecting wind. A threshing machine having a processing capacity adjusting mechanism for adjusting the processing capacity, wherein the threshing machine is provided with a processing capacity automatic control means for automatically controlling the processing capacity adjusting mechanism according to the processing situation of the object to be processed. Forming a confluent air passage in which the suction port communicates with a portion other than the selection air passage and the discharge port communicates with the selection air passage, and treats the object to be processed based on the detection value of the flow rate sensor provided in the confluence air passage. It judges the situation.
That is, since the air volume of the sorting wind that changes according to the processing status of the processing object is detected and the sorting capacity of the sorting section is automatically controlled based on the detected value, the processing capacity of the sorting section is changed to the processing status of the processing object. It is possible to improve the sorting accuracy by adapting to.
Moreover, since the flow rate sensor that detects the flow rate of the sorting wind is provided in the merging air passage that merges with the sorting wind passage, the flow rate sensor detects the flow of the sorting wind as in the case where the flow rate sensor is provided in the sorting wind passage. Although there is no inconvenience that obstructs the above, there is an advantage that the flow rate sensor can be protected from the dust contained in the sorting wind. Furthermore, since the inlet of the confluence air passage communicates with the outside of the sorting air passage, the dust contained in the sorting wind is combined with the confluence air passage (flow sensor).
It is possible to avoid the inconvenience of entering. Further, since a non-contact type flow sensor having no mechanically operating portion can be used as the flow sensor, it is possible to improve durability as compared with the float sensor. Further, the outlet of the confluence air passage is extended inward of the selection air passage. In other words, even though a flow sensor is provided in the confluence air passage,
It is possible to detect the central air volume of the sorted air. Further, an exhaust guide is provided near the exhaust port of the confluent air passage to prevent the inflow of the sorting wind. That is, it is not possible to prevent the inflow from the exhaust port to smooth the flow in the combined air passage, and it is possible to eliminate the inconvenience that the dust contained in the sorted air flows from the exhaust port. In addition, the outlet of the confluence air passage is extended in the leeward direction of the selection air passage. That is, it is not possible to prevent the inflow from the exhaust port to smooth the flow in the combined air passage, and it is possible to eliminate the inconvenience that the dust contained in the sorted air flows from the exhaust port.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Next, one of the embodiments of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a threshing section mounted on a combine, and the threshing section 1 includes a threshing feed chain 3 for nipping and transporting cut stalks along a handling chamber 2 and an object to be treated (dust-extracted) from the transport stalks. A handling cylinder 4 for threshing (grains containing a mixture of things, etc.), a receiving net 5 for leaking the threshed object to be treated, an object to be treated that has reached the end of the handling chamber without leaking from the receiving net 5. A processing cylinder 6 for pulverizing, a second receiving net 7 through which the processing cylinder 6 leaks the single-grained processing object, and a swing for sequentially swinging and transporting the processing object leaked from the receiving network 5. A flow plate 8, a filtering and sorting unit 9 that filters and sorts an object to be processed at the end of the oscillating flow plate 8, and a Kara-mino fan 10 that selects the object leaked from the filtering and sorting unit 9 with the most selective air. The first spiral 11 that laterally conveys the selected grains, and the grains that have been conveyed to the end of the first spiral 11 are lifted and conveyed to a grain tank (not shown). The fried grain cylinder 13, the strorac 14 for filtering and sorting the material not leaked from the filtration / sorting section 9 and the material to be treated leaked from the second receiving net 7, and the material to be treated leaked from the strorac 14 A second sorting fan 15 for wind sorting the objects with a second sorting wind, a second spiral 16 for laterally transporting the wind sorted second materials, and an object to be processed transported to the end of the second spiral 16 for the sorting path. A second reducing cylinder 17 for returning the inside, a suction fan 18 for discharging straw waste or the like at the end position of the strorac 14, a straw chain 19 for sandwiching and transporting the threshing-treated straw to the rear of the machine, It is composed of a rotor (not shown) or the like for dropping the shavings from the conveying stem culm of the straw chain 19, but these basic structures are all conventional. The oscillating flow plate 8, the filtering / sorting unit 9 and the strorack 14 constitute an integral oscillating assembly (oscillating sorting body) A, which is driven by a crank mechanism or a cam mechanism. .

The filtration / sorting section 9 comprises a chaff sheave 20 which is a first filtration / sorting body and a grain sieve 21 which is a second filtration / sorting body provided in two upper and lower stages, and the chaff sheave 20 in the upper stage is While the plurality of fins 20a are arranged side by side at a predetermined interval in the front-rear direction, the lower grain sheave 21 is made of a wire mesh member having a predetermined mesh. The upper support pin 20b is pivotally supported by the fixed member, while the lower support pin 20c is pivotally supported by the movable plate 20d in a series. Therefore, each fin 2 is driven by driving the motor 22 connected to the movable plate 20d via a wire (not shown).
It is possible to integrally rotate 0a to adjust the opening degree (processing capacity) of the chaff sheave 20. However, the opening degree detection sensor 23 detects the opening degree of the chaff sheave 20, and the sorting control unit 24 to be described later. It is designed to be input into.

Reference numeral 25 denotes a return pan disposed above the end portion of the chaff sheave 20.
The reference numeral 5 regulates that the object to be processed such as dust particles hit by the rotor directly falls on the chaff sheave 20, and the object to be processed received by the upper surface is rocked integrally with the rocking assembly A. Based on the above, it is transferred to the side of the straw rack 14, but the transfer path from the chaff sheave 20 to the straw rack 14 and the sorting air passage of the Karawan fan 10 are not blocked, and the shape is open in the front-rear direction (front view). Is formed in.

Reference numeral 26 denotes an air passage partition top plate disposed above the strorac 14, and the air passage partition top plate 26 is
A sorting air duct that guides the sorting air blown by the Kara-mino fan 10, the second sorting fan 15, and the suction fan 18 to the suction fan 18 at the leeward position of the filtration sorting unit 9 is formed. Since it blows through the sorting unit 9 and reaches the airway partition top plate 26, the air volume of the sorting wind on the airway partition top plate 26 changes depending on the amount (processing condition) of the object to be processed in the filtration sorting unit 9. Has become.

Reference numeral 27 denotes a merged air passage (one-sided bypass air passage) formed above the air passage partition top plate 26. An inlet port 27a of the merged air passage 27 communicates with the outside of the machine, while an exhaust port. Two
7b is in communication with the sorting air passage, and therefore the confluence air passage 27
The air flow is generated according to the pressure difference between the atmospheric pressure outside the machine (atmospheric pressure) and the atmospheric pressure in the sorting air passage (negative pressure generated according to the air volume of the sorting wind).

The merging air passage 27 is formed by using a flexible vinyl pipe, and the outlet 2 of the merging air passage is formed.
7b is extended in the leeward direction of the selection wind along the wind path partition top plate 26. That is, it is possible to prevent the sorted air from flowing in from the discharge port 27b to smooth the flow in the combined air passage 27, and to prevent the dust contained in the sorted air from flowing into the combined air passage 27. .

Reference numeral 29 is a discharge guide projecting from the lower surface of the air passage partition top plate 26. The discharge guide 29 is located on the windward side of the discharge port 27b and functions as a windbreak for the discharge port 27b. However, since the discharge guide 29 of the present embodiment is formed in a shape that is wider and taller on the leeward side, it is possible to protect the discharge port 27b from wind without disturbing the flow of the sorting wind, and as a result, the discharge guide 29 is discharged. The combined air discharged from the outlet 27b can be smoothly combined with little interference with the selection air.

Reference numeral 30 is a flow rate sensor provided in the merged air passage 27, and the flow rate sensor 30 detects the air volume in the merged air passage 27 and inputs it to the selection control section 24. That is, in determining the amount (processing status) of the object to be processed in the filtering and sorting unit 9 based on the detection of the air volume of the sorting air, the flow rate sensor 30 that detects the air volume is provided in the merging air passage 27 that joins the sorting air passage. Therefore, it is possible to avoid the inconvenience that the flow rate sensor 30 impedes the flow of the sorting air as in the case where the flow rate sensor 30 is provided in the sorting air passage, and protect the flow rate sensor 30 from the dust contained in the sorting air. Moreover, the detection error due to the dust can be minimized.

The flow rate sensor 30 has an ambient temperature sensor for detecting the ambient temperature and a heating temperature controlled to be higher than the ambient temperature by a predetermined temperature in a detection air passage extending from the intake port 30a to the exhaust port 30b. A heater, a windward side temperature sensor arranged on the windward side of the heater, and a detection chip 30c incorporating a leeward side temperature sensor arranged on the leeward side of the heater. ,
The flow rate is detected based on the temperature difference between the windward side detected temperature and the leeward side detected temperature. That is, when there is no flow in the merged air passage 27, the temperature distribution around the heater becomes uniform, so the temperature difference becomes “0”, while when there is a flow in the merged air passage 27, the temperature around the heater is reduced. Since the temperature distribution of (1) is biased to the leeward side according to the flow rate, the flow rate can be detected based on the temperature difference.

The sorting control section 24 is constructed by using a microcomputer, and has an input side for turning on and off the opening detection sensor 23, the flow rate sensor 30, and the "sorting automatic control". Sorting automatic switch 3
1. An opening setting volume 32 for manually setting the opening of the chaff sheave 20, a working machine clutch switch 33 for detecting the on / off state of a working machine clutch (not shown), etc. are connected via a predetermined input interface circuit. On the other hand, the output side is connected to the above-mentioned motor 22 and the like via a predetermined output interface circuit. That is, the sorting control unit 24 includes a control routine such as “sorting automatic control” that automatically controls the opening degree of the chaff sheave 20 based on the detection value of the flow rate sensor 30, and hereinafter, “sorting automatic control”. The control procedure will be described based on a flowchart.

In the "selection automatic control", it is determined whether the selection automatic switch 31 is ON or the work implement clutch switch 33 is O.
N determination and failure determination of each sensor are performed. When the automatic sorting switch 31 is OFF, the opening value of the chaff sheave 20 is set based on the setting value of the opening setting volume 32, and then the "chuff sheave opening value output" is executed. When the switch 31 is ON and the work implement clutch switch 33 is OFF, the ON judgment of the work implement clutch switch 33 is repeated, and the automatic sorting switch 31 and the work implement clutch switch 33 are O.
If N and the sensor is out of order, the same process as when the automatic sorting switch is turned off is executed after the sensor error warning is output, but the automatic sorting switch 31 and the work implement clutch switch 33 are on, and the sensor Is normal, the opening degree of the chaff sheave 20 is determined based on the detection value of the flow rate detection sensor 30 (for example, the opening degree is determined so that the flow rate detection value is constant). The "chuff sheave opening value output" for feedback-controlling the opening of the chaf sheave 20 based on the opening is sequentially executed.

In the structure configured as described above, when automatically controlling the opening degree of the chaff sheave 20 according to the processing condition of the object to be processed, the air volume of the selecting air (the selecting air flow) which changes according to the processing condition of the object to be processed. (Pressure of the road) is detected by the flow rate sensor 30 and the processing status of the object to be processed is determined based on the detected value. Therefore, the opening degree of the chaff sheave 20 is adapted to the actual processing status to improve the sorting accuracy. You can

Moreover, since the flow rate sensor 30 for detecting the flow rate of the sorting wind is provided in the merging air passage 27 that joins the sorting wind passage, the flow rate is the same as when the flow rate sensor 30 is provided in the sorting wind passage. There is an advantage that the sensor 30 does not hinder the flow of the sorting air, or there is an advantage that the flow sensor 30 can be protected from the dust contained in the sorting air.

Further, since the inlet 27a of the merging air passage 27 communicates with the outside of the machine, it is possible to reduce the inflow of dust as compared with the case where the inlet 27a communicates with the sorting air passage. As a result, the detection error due to the dust can be minimized and the detection accuracy can be improved.

Further, since the flow rate sensor 30 is a non-contact type sensor having no mechanical operation portion, it is not possible to improve the durability as compared with the float sensor, and the object to be processed is the flow rate sensor. The inconvenience of being damaged by contact with 30 can be avoided.

Further, since the discharge guide 29 is provided at the windward position of the discharge port 27b and the discharge port 27b is extended in the leeward direction, the selection wind is prevented from flowing from the discharge port 27b, and the merged air passage 27 is formed. Not only is it not possible to make the flow smooth, but it is also possible to eliminate the inconvenience that the dust contained in the sorting air flows from the outlet 27b.

The present invention is not limited to the above-mentioned embodiment, and for example, the suction port 27a is used.
The position of the discharge port 27b and the discharge port 27b can be arbitrarily changed. For example, as in the second embodiment shown in FIGS. 6 and 7,
The outlet 27 is provided in the air passage partition side plate 34 that partitions the side of the sorting air passage.
b may be provided, or the discharge port 27b may be provided on the lower surface of the return pan 25 as in the third embodiment shown in FIG. Further, the number of the merged air passages 27 and the number of the flow rate sensors 30 can be arbitrarily set. For example, as in the fourth embodiment shown in FIG. 9, separately from the merged air passages 27 shown in the first embodiment. The return pan 25 may be formed with the second combined air passage 35 having the outlet 27b, and the flow rates of the combined air passages 27 and 35 may be detected. In this case, the reliability of the detected value Is not allowed to improve, and it can contribute to improvement in accuracy of automatic sorting control. Further, in the first embodiment, the discharge port 27b of the confluent air passage 27 extends in the leeward direction, but as in the fifth embodiment shown in FIG. 10, the discharge port 27b is directed toward the inside of the selection air passage. In case of extension,
Since it is possible to generate a flow in the combined air passage 27 in accordance with the central part air volume of the sorting air, it is possible to improve the air volume detection accuracy of the sorting air. Further, unlike the sixth embodiment shown in FIGS. 11A and 11B, the discharge port 27b may not be extended. In this case, the discharge guide 29 is provided at the windward position. It is desirable to prevent the inflow of sorting air and dust.

[Brief description of drawings]

FIG. 1 is an internal side view of a threshing unit.

FIG. 2 is a schematic side view of the main part of the same.

FIG. 3 (A) is an enlarged side view of relevant parts of the same, and FIG. 3 (B) is a bottom view of a discharge port.

FIG. 4 is a block diagram showing input / output of a selection control unit.

FIG. 5 is a flowchart of “selection automatic control”.

FIG. 6 is a schematic side view of a main part of a threshing section showing a second embodiment.

FIG. 7 is a plan view of the same.

FIG. 8 is a schematic side view of a main part of a threshing unit showing a third embodiment.

FIG. 9 is a schematic side view of a main part of a threshing unit showing a fourth embodiment.

FIG. 10 is a side view of a discharge port showing a fifth embodiment.

FIG. 11A is a side view of a discharge port showing a sixth embodiment, and FIG. 11B is a bottom view.

[Explanation of symbols]

1 Threshing department 8 rocking flow plate 9 Filtration and sorting section 10 Karano fan 20 chaff sheaves 22 motor 24 Sorting control unit 27 confluence 30 Flow sensor

Continuation of the front page (56) Reference JP-A-6-22638 (JP, A) JP-A-56-140817 (JP, A) Actual opening 3-10732 (JP, U) Actual opening Sho-58-83249 (JP , U) Actual Development Sho 58-91259 (JP, U) Actual Public Sho 52-23497 (JP, Y1) (58) Fields investigated (Int.Cl. ⁷ , DB name) A01F 12/00-12/60 G01F 1/00 G01F 1/68

Claims (4)

(57) [Claims] 1. A thresher having a processing capacity adjusting mechanism for adjusting the processing capacity in a sorting unit for sorting the objects to be processed with a sorting wind, the threshing machine being provided with a thresher according to the processing status of the objects to be treated. In providing a processing capacity automatic control means for automatically controlling the processing capacity adjusting mechanism, a suction air passage communicates with a portion other than the sorting air passage, and a discharge outlet forms a merging air passage communicating with the sorting air passage, and the merging A thresher that determines the processing status of an object to be processed based on the detection value of a flow rate sensor provided in the air passage. 2. The thresher according to claim 1, wherein the outlet of the confluence air passage extends inward of the selection air passage. 3. The thresher according to claim 1, wherein an exhaust guide is provided near the exhaust port of the confluent air passage to prevent the inflow of the sorting air. 4. The thresher according to claim 1, wherein the outlet of the confluence air passage extends in the leeward direction of the sorting air passage.