JPH1175513A - Thresher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a thresher having improved screening accuracy without causing the blocking of screening air flow with a sensor by providing a pressure- inlet port with a pressure sensor extending into a screening air channel and judging the treating state of the treating object based on the detection result of the pressure sensor. SOLUTION: A screening part 9 for the screening of a treating object by a screening wind is provided with a processing capacity controlling mechanism for controlling the processing capacity of the thresher. The thresher having the above structure is provided with an automatic controlling means to automatically control the processing capacity controlling mechanism according to the treating state of the treating object by placing pressure sensors 21, 28 extending into the screening air flow channel at the pressure-inlet port and the treating state of the treating object is judged by the detection results of the pressure sensors 27, 28. Preferably, a pressure sensor 27 for detecting the air pressure in the screening air flow channel and a pressure sensor 28 for detecting the air pressure at a part other than the flow channel are provided and the treating state of the treating object is judged based on the detection results of both pressure sensors 21, 28.

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. In addition, a pressure sensor having a pressure introduction port extending into the sorting air path is provided, and the processing state of the processing target is determined based on a detection value of the pressure sensor. In other words, the pressure of the sorting air passage, which changes according to the processing status of the processing object, is detected, and the processing capacity of the sorting unit is automatically controlled based on the detected value. The sorting accuracy can be improved by adapting to the situation. In addition, the main body of the pressure sensor that detects the pressure
Because it can be placed in a place other than the sorting wind path, as in the case where a pressure sensor is provided in the sorting wind path, there is no inconvenience that the pressure sensor hinders the flow of the sorting wind, There is an advantage that the pressure sensor can be protected from pressure. Also,
As the pressure sensor, a non-contact type pressure sensor having no mechanically operating portion can be used, so that the durability can be improved as compared with the float sensor. Also, a threshing machine provided with a processing capacity adjusting mechanism for adjusting a processing capacity in a sorting unit that sorts a processing object with a sorting wind, wherein the threshing machine has a processing capacity adjustment function according to the processing status of the processing object. In providing the processing capacity automatic control means for automatically controlling the mechanism, a pressure sensor for detecting the air pressure of the sorting air path and a pressure sensor for detecting the air pressure other than the sorting air path are provided. The processing status of the object to be processed is determined based on this. That is, the pressure of the sorting air path that changes according to the processing state of the processing object and the external air pressure that affects the pressure of the sorting air path are detected, and the processing state of the sorting unit is determined based on both the detected values. Therefore, it is possible to determine the processing state with high accuracy without being affected by the outside air pressure, and as a result, it is possible to further improve the accuracy of the automatic control of the processing capacity.

[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 blows through the sorting unit 9 and reaches the air path partitioning top plate 26, the amount of the screening wind and the air pressure of the sorting air path in the air path partitioning top plate 26 depend on the amount of the material to be processed (processing state) in the filtering and sorting unit 9. It changes according to.

Reference numeral 27 denotes a first pressure sensor provided on the air path partitioning top plate 26. The first pressure sensor 27 has a cylindrical pressure inlet 27b projecting from a sensor main body 27a. For detecting the gas pressure introduced from the inlet 27b, the sensor main body 27a is arranged above the air path partitioning top plate 26, while the pressure inlet 27b is
The air passes through the air path partition top plate 26 and extends to the sorting air path. That is, when judging the amount of the object to be processed (processing status) in the filtering and sorting unit 9 based on the amount of the sorting wind, the sensor main body 27a determines the pressure of the sorting air passage that changes according to the amount of the sorting wind. First pressure sensor 2 arranged outside the road
7 so that the sensor body 2
As in the case where 7a is arranged, the inconvenience of the sensor main body 27a obstructing the flow of the sorting wind can be avoided, and the sensor main body 27a can be protected from dust contained in the sorting wind.

Reference numeral 28 denotes a second pressure sensor disposed at a position different from the first pressure sensor 27. The second pressure sensor 28 has a pressure inlet 28b for detecting atmospheric pressure. It is arranged at a position communicating with the. Then, in the selection control unit 24 which inputs the detection signals of the two pressure sensors 27 and 28, the first pressure sensor 2 which is affected by the atmospheric pressure change is provided.
7 can be corrected based on the pressure detected by the second pressure sensor 28, so that the processing status of the sorting target can be properly determined regardless of the atmospheric pressure change. I have.

By the way, various pressure sensors can be used as the pressure sensors 27 and 28. In this embodiment, the reference pressure chambers 27c and 28c in which a non-corrosive gas is hermetically sealed are used. And the pressure inlet 27b, 2
Introducing pressure chambers 27d, 28d communicating with the outside via 8b
And an elastically deformable partition wall 2 functioning as a strain gauge.
A structure without a mechanically operating portion partitioned by 7e and 28e is employed.

The selection control section 24 is constituted by using a microcomputer, and has an input side thereof provided with the opening detection sensor 23 and the first and second pressure sensors 2 described above.
7, 28, an automatic selection switch 29 for turning on and off the automatic selection control, an opening setting volume 30 for manually setting the opening of the chaff sheave 20, and an on / off state of a work machine clutch (not shown). The working machine clutch switch 31 and the like to be detected are connected via a predetermined input interface circuit, while the output
Are connected via a predetermined output interface circuit. That is, the selection control unit 24 controls the pressure sensors 27, 2
And a control routine such as "automatic selection control" for automatically controlling the opening of the chaff sheave 20 based on the detected value of the control unit 8. The control procedure of "automatic selection control" will be described below with reference to a flowchart. .

In the above-mentioned "selection automatic control", the ON judgment of the selection automatic switch 29 and the ON / OFF of the work machine clutch switch 31 are performed.
N determination and failure determination of each sensor are performed. When the selection automatic switch 29 is OFF, after setting the opening value of the chaff sheave 20 based on the set value of the opening setting volume 30, "chaff sheave opening value output" is executed. When the switch 29 is ON and the work machine clutch switch 31 is OFF, the ON determination of the work machine clutch switch 31 is repeated, and the sorting automatic switch 29 and the work machine clutch switch 31 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 29 and the work machine clutch switch 31 are turned on and the sensor Is normal, the first pressure sensor 27 and the second pressure sensor 28
"Opening determination" that determines the opening of the chaff sheave 20 based on the detected value of the opening (in this embodiment, the opening is determined so that the detected pressure difference between the first pressure sensor value and the second pressure sensor value is constant) ) And “chaff sheave opening value output” that feedback-controls the opening of the chaff sheave 20 based on the determined opening.
Are sequentially executed.

In the apparatus configured as described above, when automatically controlling the opening of the chaff sheave 20 in accordance with the processing status of the processing target, the amount of the screening wind that changes in accordance with the processing status of the processing target is determined by the selection wind. To detect the pressure change of the road, and to determine the processing status of the processing target based on the detected value,
The sorting accuracy can be improved by adjusting the opening of the chaff sheave 20 to the actual processing situation.

Further, since the sensor main body 27a of the first pressure sensor 27 for detecting the pressure of the sorting air passage is disposed outside the sorting air passage, the sensor body 27a is provided in the sorting air passage as in the case where the sensor main body 27a is provided. There is an advantage that the sensor main body 27a can prevent the inconvenience of obstructing the flow of the sorting wind, or the sensor main body 27a can be protected from dust contained in the sorting wind.

Further, since the first pressure sensor 27 is a non-contact type sensor having no mechanically operating portion, it is not possible to improve the durability as compared with the float sensor.
The inconvenience of the workpiece being damaged by contact with the first pressure sensor 27 can also be avoided.

Also, a first pressure sensor 27 for detecting the pressure of the sorting air passage and a second pressure sensor 28 for detecting the atmospheric pressure are provided, and the opening of the chief sheave 20 is determined based on the two pressure sensor values. In addition, the control error based on the change in the outside air pressure can be eliminated, and the accuracy of the automatic selection control can be further improved.

[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. 3 is an enlarged side view of a main part of the above.

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

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

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 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 first pressure sensor 28 second pressure sensor

Claims (2)

[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 pressure sensor having a pressure inlet extending to the sorting air path is provided, and the processing status of the processing target based on the detection value of the pressure sensor is provided. To determine the threshing machine. 2. A threshing machine provided with a processing capacity adjusting mechanism for adjusting a processing capacity in a sorting section for sorting an object to be treated 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 pressure sensor for detecting the air pressure of the sorting air path and a pressure sensor for detecting the air pressure other than the sorting air path are provided. A threshing machine that determines the processing status of an object to be processed based on the detected value.