JPH1175516A - Thresher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a thresher having improved screening accuracy and controlling accuracy without causing the blocking of the flow of screening wind with a sensor by judging the treating state of a treating object based on the detection result of a flow rate sensor placed in a joint air channel. SOLUTION: This thresher is provided with a capacity controlling mechanism for controlling the processing capacity and placed on a screening part for screening a treating object with screening air flow and further with a means for automatically controlling the processing capacity controlling mechanism according to the treating state of a treating object. A joint air flow channel 27 having a suction port 27a connected to a part other than the screening air channel and an exhaustion port 27b connected to the screening air channel is formed and the treating state of the treating object is judged based on the detection result of a flow rate sensor 30 placed in the joint air flow channel 27. Preferably, the exhaustion port 27b of the joint flow channel 27 is extended into the screening air channel, an exhaustion guide 29 for inhibiting the intrusion of the screening air flow is placed near the exhaustion port 27b and the exhaustion port 27b is extended in the downstream direction of the screening air channel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a threshing machine mounted on a combine, a harvester or the like.

[0002]

2. Description of the Related Art In general, in this kind of threshing machine, an object to be processed which has leaked from a receiving net of a handling room is filtered by a filtering / separating section (a chaff sieve, a grain sieve, etc.) provided at the end of an oscillating flow plate. At the same time as sorting, the material to be leaked from the filtration and sorting unit is further selected by a Karin fan sorting wind, and the selected kernels are stored in the kernel tank via the first spiral and the deeper spiral. If the processing capacity of the filtration and sorting unit is constant, there is no possibility that the accuracy of the sorting will vary with the increase or decrease in the number of objects to be processed, and so-called overflows may occur and the scattered particles may increase. Was.

[0003]

Accordingly, a layer thickness of an object to be processed laminated on an oscillating flow plate is detected by a layer thickness detecting sensor (float sensor), and a sorting processing capability (filtering) is performed based on the detected value. An apparatus that automatically controls the degree of opening of the sorting unit) has been proposed. However, the layer thickness detection sensor is located at a position (the center of the oscillating flow plate) where the workpiece falling from the handling chamber directly hits.
Therefore, it is difficult to accurately detect the amount of the object to be processed, and as a result, the processing capacity may not be suitable for the actual processing situation.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to solve these problems in view of the above-mentioned circumstances, and is directed to a sorting section for sorting an object to be processed in a sorting manner. A threshing machine provided with a processing capacity adjusting mechanism for adjusting the processing capacity, wherein the threshing machine is provided with processing capacity automatic control means for automatically controlling the processing capacity adjusting mechanism in accordance with the processing status of the processing target. Forming a merging air passage in which the suction port communicates with a part other than the sorting air path and the discharging port communicates with the screening air path, and processing of the object to be processed based on a detection value of a flow sensor provided in the merging air path. This is to judge the situation.
That is, the amount of the sorting wind that changes according to the processing status of the processing target is detected, and the sorting capability of the selection unit is automatically controlled based on the detected value. To improve the sorting accuracy.
In addition, since the flow sensor for detecting the flow rate of the screening wind is provided in the merging air passage that joins the screening air passage, the flow sensor detects the flow of the screening wind as in the case where the flow sensor is provided in the screening air passage. There is an advantage that the flow rate sensor can be protected from dust contained in the sorting wind. Furthermore, since the inlet of the merging air passage communicates with the outside of the sorting air passage, dust contained in the sorting wind is merged with the merging air passage (flow sensor).
The inconvenience of getting into can be avoided. In addition, since a non-contact type flow sensor having no mechanically operating portion can be used as the flow sensor, the durability can be improved as compared with the float sensor. In addition, the outlet of the merged air duct is extended inward of the sorting air duct. In other words, while a flow sensor is provided in the merging air path,
It is possible to detect the center-side airflow of the sorted wind. In addition, a discharge guide is provided in the vicinity of the discharge port of the merging air passage to prevent the inflow of the sorted wind. That is, it is not allowed to prevent the inflow from the discharge port to make the flow in the merged air path smooth, and it is also possible to eliminate the inconvenience that the dust contained in the sorted wind flows from the discharge port. Further, the outlet of the merging air passage extends in the leeward direction of the sorting air passage. That is, it is not allowed to prevent the inflow from the discharge port to make the flow in the merged air path smooth, and it is also possible to eliminate the inconvenience that the dust contained in the sorted wind flows from the discharge port.

[0005]

Next, one embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a threshing unit mounted on a combine. The threshing unit 1 is a threshing feed chain 3 for pinching and transporting the cut stems along a handling room 2, and an object to be treated (dust removal) from the transported stems. Cylinder 4 for threshing a grain containing a mixture of materials and the like, receiving net 5 for leaking the threshed material to be processed, and the processed material reaching the end of the handling chamber without leaking from the receiving net 5 A processing cylinder 6 for monogranulation processing, a second receiving net 7 for leaking the single-granulated workpiece, and a swing for sequentially swinging and conveying the workpiece leaked from the receiving net 5 A flow plate 8, a filtering and sorting unit 9 for filtering and sorting an object to be processed at an end portion of the oscillating flow plate 8, a Karamin fan 10 for carefully selecting an object to be processed which has leaked from the filtration and sorting unit 9 by a first sorting wind, The first spiral 11 that horizontally transports the selected grain, and the kernel that has been transported to the end of the first spiral 11 is lifted and transported to a kernel tank (not shown). Straw rack 14 for filtering and filtering the unprocessed material that has not leaked from the filtering and sorting unit 9 and the processed material that has leaked from the second receiving net 7, and the processed material that has leaked from the straw rack 14 A second sorting fan 15 that sorts the objects by the second sorting wind, a second spiral 16 that horizontally transports the second sorted wind, and the above-described sorting path that passes the workpiece that has been transported to the end of the second spiral 16. A second return cylinder 17 for returning the inside, a suction fan 18 for discharging straw waste and the like outside the machine at the end position of the straw rack 14, a straw chain 19 for pinching and conveying thresh-treated straw to the rear of the machine, It is composed of a rotor (not shown) for dropping sleds from the transport stem of the straw chain 19, and the like, but any of these basic configurations are conventional. The oscillating flow plate 8, the filtering / separating section 9 and the stralac 14 constitute an integral oscillating assembly (oscillating and separating body) A, and are driven by a crank mechanism or a cam mechanism. .

[0006] The filtering and sorting unit 9 is configured by providing a chaff sheave 20 as a first filtering and sorting body and a grain sieve 21 as a second filtering and sorting body in two upper and lower stages. While the lower grain sheave 21 is composed of a wire mesh member having a predetermined mesh, the lower grain sheave 21 is composed of a plurality of fins 20a arranged side by side at predetermined intervals in the front-rear direction. The upper support pin 20b is pivotally supported by a 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 a motor 22 connected to the movable plate 20d via a wire (not shown).
It is possible to adjust the opening degree (processing capacity) of the chaff sheave 20 by integrally rotating the O.sub.a 0a. However, the opening degree of the chaff sheave 20 is detected by the opening degree detection sensor 23, and the sorting control unit 24 described later is used. Is entered.

[0007] A return pan 25 is provided above the end of the chaff sheave 20.
5 regulates the object to be processed, such as shavings, knocked down by the rotor from dropping directly onto the chaff sheave 20, and swings the object received on the upper surface integrally with the swinging assembly A. Is transported to the straw rack 14 side in accordance with the above, but in order not to obstruct the transport path from the chaff sheave 20 to the straw rack 14 and the sorting air path of the Karamin fan 10, it is opened in the front-rear direction (front view). Is formed.

Reference numeral 26 denotes an air path partitioning top provided above the straw rack 14, and the air path partitioning top 26 is
A sorting air path is formed to guide the sorting wind generated by the Karamin fan 10, the second sorting fan 15 and the suction fan 18 to the suction fan 18 at a position more leeward than the filtering and sorting unit 9, but the sorting wind is filtered. Since the air passes through the sorting unit 9 and reaches the air-path partitioning top 26, the amount of the sorting wind in the air-path separating top 26 changes according to the amount of the processing target (processing state) in the filtering and sorting unit 9. Has become.

Reference numeral 27 denotes a merging air passage (single bypass air passage) formed above the air passage partitioning top plate 26. An inlet 27a of the merging air passage 27 communicates with the outside of the apparatus, while a discharge outlet 27a. 2
7b is in communication with the sorting air passage, and
, An air flow is generated in accordance with the pressure difference between the outside air pressure (atmospheric pressure) and the air pressure in the sorting air path (negative pressure generated according to the amount of sorting wind).

The merging air passage 27 is formed by using a flexible vinyl pipe.
7b extends in the leeward direction of the sorting wind along the air path partitioning top plate 26. That is, the flow of the sorting wind is prevented from flowing in from the discharge port 27b to smooth the flow of the combined air passage 27, and the dust contained in the sorted wind is prevented from flowing into the combined air passage 27. .

Reference numeral 29 denotes a discharge guide projecting from the lower surface of the air path partitioning top plate 26. The discharge guide 29 is located on the windward side of the discharge port 27b and functions as a wind shield for the discharge port 27b. However, since the discharge guide 29 of the present embodiment is formed to be wider and taller toward the leeward side, the discharge port 27b can be shielded from the wind without disturbing the flow of the sorting wind. The merged air discharged from the outlet 27b can be smoothly merged with little interference with the sorting wind.

Reference numeral 30 denotes a flow sensor provided in the merged air passage 27. The flow sensor 30 detects the amount of air in the merged air passage 27 and inputs the detected air flow to the sorting control unit 24. In other words, when judging the amount (processing state) of the object to be processed in the filtration and sorting unit 9 based on the detection of the airflow of the screening air, the flow sensor 30 for detecting the airflow is provided in the merging airflow path 27 that joins the screening airflow path. As a result, unlike the case where the flow sensor 30 is provided in the separation wind path, the inconvenience of the flow sensor 30 obstructing the flow of the separation wind can be avoided, and the flow sensor 30 is protected from the dust contained in the separation wind. In addition, the detection error due to the dust can be reduced as much as possible.

The flow rate sensor 30 has an ambient temperature sensor for detecting an ambient temperature in a detection air passage extending from the inlet port 30a to the outlet port 30b, and has a heating temperature controlled so as to be higher than the ambient temperature by a predetermined temperature. And a detection chip 30c in which a leeward temperature sensor disposed on the leeward side of the heater and a leeward temperature sensor disposed on the leeward side of the heater are arranged without a mechanically operating portion. ,
The flow rate is detected based on the temperature difference between the detected temperature on the leeward side and the detected temperature on the leeward side. That is, when there is no flow in the merging air passage 27, the temperature distribution around the heater becomes uniform, and thus the temperature difference becomes “0”. Is biased to the leeward side according to the flow rate, so that the flow rate can be detected based on the temperature difference.

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

In the above-mentioned "selection automatic control", it is determined whether the automatic selection switch 31 is ON or not, and the ON state of the work machine clutch switch 33 is determined.
N determination and failure determination of each sensor are performed. Then, when the selection automatic switch 31 is OFF, after setting the opening value of the chaff sheave 20 based on the set value of the opening setting volume 32, "chaff sheave opening value output" is executed, and When the switch 31 is ON and the work machine clutch switch 33 is OFF, the ON determination of the work machine clutch switch 33 is repeated, and the sorting automatic switch 31 and the work machine clutch switch 33 are turned OFF.
If N and the sensor is faulty, after outputting a sensor error alarm, the same processing as when the sorting automatic switch is turned off is executed, but the sorting automatic switch 31 and the work machine clutch switch 33 are turned on and the sensor Is normal, the "opening determination" for determining the opening of the chaff sheave 20 based on the detection value of the flow detection sensor 30 (for example, the opening is determined so that the flow detection value is constant) is determined. “Chaff sheave opening value output” for performing feedback control of the opening of the chaff sheave 20 based on the opening is sequentially executed.

In the apparatus configured as described above, in automatically controlling the opening of the chaff sheave 20 in accordance with the processing status of the processing target, the airflow of the screening wind (selecting wind) that changes according to the processing status of the processing target. (The air pressure of the road) is detected by the flow rate sensor 30, and the processing state of the object to be processed is determined based on the detected value, so that the opening degree of the chaff sheave 20 is adapted to the actual processing state to improve the sorting accuracy. Can be.

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

Further, in the merging air passage 27, since the suction port 27a communicates with the outside of the machine, it is possible to reduce the inflow of the dust as compared with the case where the suction port 27a communicates with the sorting air path. As a result, it is possible to improve the detection accuracy by minimizing the detection error due to the dust.

Further, since the flow sensor 30 is a non-contact type sensor having no mechanically operating portion, the durability cannot be improved as compared with the float sensor. The inconvenience of being damaged by contact with 30 can also be avoided.

Further, since the discharge guide 29 is provided at the leeward position of the discharge port 27b, and the discharge port 27b extends in the leeward direction, the sorting wind is prevented from flowing through the discharge port 27b, and Not only is it not possible to make the flow smooth, but also the inconvenience that dust contained in the sorting wind flows in from the outlet 27b can be solved.

The present invention is, of course, not limited to the above-described embodiment.
And the position of the outlet 27b can be arbitrarily changed. For example, as in the second embodiment shown in FIGS. 6 and 7,
A discharge port 27 is provided on the side wall 34 of the air path partitioning the side of the sorting air path.
b, or a discharge port 27b may be provided on the lower surface of the return pan 25 as in the third embodiment shown in FIG. In addition, the number of the merging air passages 27 and the number of the flow sensors 30 can be arbitrarily set. For example, as in the fourth embodiment shown in FIG. 9, separately from the merging air passages 27 shown in the first embodiment. Alternatively, the second merging air passage 35 having the outlet 27b in the return pan 25 may be formed, and the flow rates of the merging air passages 27 and 35 may be respectively detected. Can be improved, and the accuracy of the automatic sorting control can be improved. In the first embodiment, the outlet 27b of the merged air passage 27 extends in the leeward direction. However, as in the fifth embodiment shown in FIG. 10, the outlet 27b is directed inward of the sorting air passage. If it is extended,
Since a flow corresponding to the central airflow of the selected wind can be generated in the merging air path 27, the detection accuracy of the airflow of the selected wind can be improved. Further, as in the sixth embodiment shown in FIGS. 11A and 11B, the discharge port 27b may not be extended, and in this case, the discharge guide 29 is provided at the windward position. It is desirable to prevent the inflow of the sorting wind and the exhausted dust.

[Brief description of the drawings]

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

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

FIG. 3A is an enlarged side view of a main part of the same, and FIG. 3B is a bottom view of a discharge port.

FIG. 4 is a block diagram showing inputs and outputs of a selection control unit.

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

FIG. 6 is a schematic side view of a main part of a threshing unit 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 an outlet 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]

 REFERENCE SIGNS LIST 1 threshing unit 8 oscillating flow plate 9 filtration and sorting unit 10 Karamin fan 20 chaff sheave 22 motor 24 sorting control unit 27 merged air passage 30 flow sensor

Claims (4)

[Claims] 1. A threshing machine provided with a processing capacity adjusting mechanism for adjusting a processing capacity in a sorting unit for sorting an object to be processed by a sorting wind, wherein the threshing machine is provided with a processing capability according to a processing state of the object to be processed. In providing the processing capacity automatic control means for automatically controlling the processing capacity adjustment mechanism, a merging air path is formed in which the suction port communicates with a part other than the selection air path and the discharge port communicates with the selection air path. A threshing machine that determines the processing status of a processing target based on a detection value of a flow rate sensor provided in an air passage. 2. The threshing machine according to claim 1, wherein the outlet of the merging air passage extends to the inside of the sorting air passage. 3. The threshing machine according to claim 1, further comprising a discharge guide near the discharge port of the merging air passage, the discharge guide blocking the inflow of the sorting wind. 4. The threshing machine according to claim 1, wherein the outlet of the merging air passage extends in the leeward direction of the sorting air passage.