JPH1028457A - Threshing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve screening accuracy by controlling the level of the gate- opening in accordance with the actual throughput at the screening classification zone in a threshing machine whose gate opening is automatically controlled in the screening classification zone. SOLUTION: When the gate-opening of the chaff sieve 20 is automatically controlled, wind sensors 26F and 26R for detecting the velocity of the screening wind blowing up from the chaff sieve 20 are set to the top edge of the chaff sieve to automatically control the gate-opening of the chaff sieve based on the detection signals of the wind velocity sensors 26F and 26R.

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 sorted which has leaked from a receiving net of a handling room is filtered by a filtering and sorting unit (chaff sheave, grain sheave, etc.) provided at the end of an oscillating flow plate. At the same time as sorting, the selected material that has leaked from the filtration and sorting unit is further selected by the Karin Fan's sorting wind, and the selected kernels are stored in the kernel tank via the first spiral and the deeper spiral. In the case where the opening degree of the filtering and sorting unit is constant, there is no possibility that the accuracy of the sorting will vary with the increase or decrease of the sorting object, and a so-called overflow may occur and the scattering particles may increase. .

[0003]

Therefore, the amount (height) of the object to be sorted laminated on the oscillating flow plate is detected by a float sensor, and the opening degree of the filtration and sorting unit is automatically determined based on the detection result. Although control is proposed, the actual amount of processing in the filtration and sorting unit varies greatly depending on the type of grain, grain size such as grain size, and therefore, an opening amount suitable for the actual processing situation is selected. However, since the float sensor is a contact-type sensor, there is a possibility that the object to be sorted may be damaged, or the durability is inferior.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to provide a threshing machine which can solve these problems in view of the above-mentioned circumstances, and is provided for threshing and sorting. At the end of the oscillating flow plate that transports the material, a filtering and sorting unit provided with an opening degree adjustment mechanism is provided, and in a threshing machine that carefully sorts the sorted material leaked from the filtering and sorting unit with a sorting wind of a Karamino fan, At a position above the filtering and sorting unit,
While providing a wind speed sensor for detecting the wind speed of the sorting wind blowing from the filtering and sorting unit, the sorting control unit for controlling the opening degree adjusting mechanism has an opening for automatically controlling the opening of the filtering and sorting unit based on the detection signal of the wind speed sensor. It is provided with automatic degree control means. In other words, since the wind speed of the sorting wind that blows up from the filtering and sorting unit changes according to the actual processing amount in the filtering and sorting unit, it is possible to automatically control the opening degree of the filtering and sorting unit according to the actual processing amount. Become. Therefore, the sorting accuracy can be improved as compared with the conventional one that detects the amount of the object to be processed by the float sensor on the oscillating flow plate, and the wind speed sensor is a non-contact type sensor, There is almost no possibility of damaging the sorting object, and the durability of the sensor can be improved.

Further, a plurality of wind speed sensors having different mounting positions in the front-rear direction are provided above the filtering and sorting unit. In other words, it is possible to increase the reliability of the wind speed sensor value, and furthermore, it is possible to compare the plurality of wind speed sensor values to determine in detail the processing status of the filtering and sorting unit. Becomes possible.

[0006] A return pan is disposed above the end of the filtration and sorting section, and a wind speed sensor is attached below the return pan. In other words, it is not possible to mount the wind speed sensor using the return pan, but it is possible to protect the wind speed sensor from falling objects and prevent the occurrence of detection errors as much as possible.

[0007]

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, and the threshing unit 1 is a threshing feed chain 3 for pinching and transporting the harvested stems along a handling room 2; And a receiving net 5 for leaking the threshed to-be-sorted material, and a single-graining treatment for the to-be-sorted material that does not leak from the receiving net 5 and reaches the end of the handling room. A processing cylinder 6, a second receiving net 7 for leaking a single-piece material to be sorted by the processing cylinder 6, an oscillating flow plate 8 for sequentially swinging and conveying the sorted material leaked from the receiving net 5, At the end of the oscillating flow plate 8, a filtering and sorting unit 9 for filtering and sorting the material to be treated, a Karamin fan 10 for sorting the material to be leaked from the filtering and sorting unit 9 with the most selective wind, and a grain that has been carefully selected. Helix 11 which horizontally transports the kernels, and a frying cylinder 1 which lifts and transports the grains transported to the end of the first spiral 11 to a grain tank (not shown) , Be sorted product did not Moshita from the filtered selection unit 9 and the second 受網 7
1 that filters and sorts the material that has leaked from the container
4. A second sorting fan 15 for sorting the articles leaked from the straw rack 14 by a second sorting wind, a second spiral 16 for horizontally transporting the second sorted wind, and a second spiral 16 A second reduction cylinder 17 for reducing the sorted material conveyed to the end to the sorting path, a suction fan 18 for discharging straw waste and the like outside the machine at the end position of the straw rack 14, and a threshing-treated waste It is composed of a discharge chain 19 for pinching and transporting to the rear part of the machine body, a rotor (not shown) for dropping sleds from the transport stem of the discharge chain 19, and the like. is there. The oscillating flow plate 8, the filtering and sorting unit 9 and the strora rack 14 constitute an integral oscillating assembly A, and are driven by a crank mechanism or a cam mechanism.

[0008] The filtering and sorting section 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, the motor 22 (opening amount adjusting mechanism) connected to the movable plate 20d via a wire (not shown)
It is possible to rotate the fins 20a integrally by driving the fins 20a to adjust the opening amount (fin interval) of the chaff sheave 20, but the opening amount of the chaff sheave 20 is detected by the opening amount detection sensor 23, and will be described later. To be input to the sorting control unit 24.

A return pan 25 is provided above the end of the chaff sheave 20.
5 regulates the sorting object, such as shavings, knocked down by the rotor directly onto the chaff sheave 20 and swings the sorting object received on the upper surface integrally with the swing assembly A. Is transported to the straw rack 14 side based on the above, but in order to not block the transport route 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 numerals 26F and 26R denote a pair of wind speed sensors (for example, rotation sensors having a propeller mounted on a sensor shaft) disposed above the end of the chief sheave 20. The pair of wind speed sensors 26F and 26R The return pan 25 is mounted using the lower surface of the return pan 25 so that the directional mounting position and the left-right mounting position are different from each other, and detects the wind speed of a sorting wind (Karaminokaze) blowing from the chaff sheave 20. . That is, chaff sheave 2
Since the wind speed of the sorting wind that blows from 0 changes according to the actual processing amount in the chaff sheave 20 (the amount of the sorting target material in the chaff sheave 20), the wind speed sensors 26F, 2F
The processing status of the chaff sheave 20 can be determined based on the 6R detection value.

The sorting control unit 24 is a control unit formed by using a microcomputer. The input ports of the sorting control unit 24 are provided with the opening degree detection sensor 23 and the wind speed sensors 26F and 26R, and the automatic sorting (opening). Sorting automatic switch 2 for turning ON / OFF
7. While the work machine clutch switch 28 for detecting the on / off state of the work machine clutch (not shown) is connected,
The above-described motor 22 and the like are connected to the output side port. That is, the selection control unit 24 controls the wind speed sensor 26F,
A control routine of automatic sorting control for automatically controlling the opening amount of the chaff sheave 20 based on the detection signal of 26R is provided. Hereinafter, a control procedure of automatic sorting control will be described with reference to a flowchart. However, in the following description,
SF is a detection value of the front wind speed sensor 26F, SR is a detection value of the rear wind speed sensor 26R, LF1 to LF3 are reference set values (small, medium, and large) of the front wind speed sensor 26F, and LR1 to LR3.
Is a reference set value (small, medium, large) of the rear wind speed sensor 26R. In the present embodiment, seven stages of opening amounts are set in advance, and the chaff sheave 20 is controlled stepwise.

In the main routine of the automatic sorting control, first, predetermined initial settings according to the model are performed.
After reading the preset sensitivity values (sensor sensitivity value and control sensitivity value), the ON / OFF state of the selection automatic switch 27 and the work machine clutch switch 28 is determined,
If both determinations are ON, initial settings necessary for starting the work (such as setting the opening amount at the start of the work) are performed, and the sensitivity value is output (set) to start automatic control. Then, in the automatic control state, the previous sensor values of the wind speed sensors 26F and 26R are compared with the current sensor value, and if the current sensor value is larger, the closing subroutine is executed, If the sensor value is smaller, the opening subroutine is executed to determine the opening amount. After the opening amount is determined, a drive command is output to the motor 22, and the opening information (current opening amount) and the sensor value information (current sensor value) are stored and up to the initial setting step. After returning to the loop, the output of the drive command to the motor 22 is delayed by a predetermined time in a timer routine for sensitivity adjustment. The timer routine for adjusting the sensitivity is a general delay routine for delaying the output of the drive command by a time corresponding to the sensitivity value, and thus the detailed description is omitted.

In the closing subroutine, the front wind speed sensor value SF and the rear wind speed sensor value SR are set to a reference set value L.
F1 to LF3 and LR1 to LR3 are compared, and based on the comparison result, the number of steps of closing the chaff sheave 20 (the closing amount based on the current opening amount) is determined. That is, when the rear sensor value SR is larger than the reference set value LR3 and the front sensor value SF is larger than the reference set value LF2, the closing amount is set in three stages, and when the rear sensor value SR is set to the reference set value LR3. And when the front sensor value SF is larger than the reference set value LF1 and the rear sensor value SR is larger than the reference set value LR3 and when the front sensor value SF is larger than 0. 1
When the rear sensor value SR is larger than the reference set value LR2 and the front sensor value SF is larger than the reference set value LF3, the rear sensor value SR is set to three stages.
R2 and the front sensor value SF is larger than the reference set value LF2, the two-step rear sensor value SR
Is larger than the reference set value LR2 and the front sensor value S
One step when F is larger than the reference set value LF1, two steps when the rear sensor value SR is larger than the reference set value LR1 and the front sensor value SF is larger than the reference set value LF3, the rear side. When the sensor value SR is larger than the reference set value LR1 and the front sensor value SF is larger than the reference set value LF2, one step is determined, but the rear sensor value SR is larger than the reference set value LR3, When the front sensor value SF is larger than the reference set value LF3, the chief sheave 20 is urgently closed (fully closed). When the front sensor value SF is larger than the rear sensor value SR, some abnormality occurs. Automatic control is urgently stopped when it is determined that the alarm has occurred.

On the other hand, in the opening subroutine, the front wind speed sensor value SF and the rear wind speed sensor value SR are compared with reference set values LF1 to LF3, LR1 to LR3, and based on the comparison result, the chaff sheave 20 is opened in several steps ( (The opening amount based on the current opening amount) is determined. That is, the opening amount is such that the rear sensor value SR is smaller than the reference set value LR1 and the front sensor value SF is 0
If the rear sensor value SR is smaller than the reference set value LF1, and if the rear sensor value SF is smaller than the reference set value LF1, the rear sensor value SR is set to three stages. 1 if the value is smaller than the value LR1 and the front sensor value SF is smaller than the reference set value LF2.
Step, if the rear sensor value SR is smaller than the reference set value LR2 and the front sensor value SF is smaller than 0, 2
When the rear sensor value SR is smaller than the reference set value LR2 and the front sensor value SF is smaller than the reference set value LF1, the rear sensor value SR is set to one stage.
If the front sensor value SF is smaller than R3 and the front sensor value SF is smaller than 0, one stage is determined, but the rear sensor value SR
Is smaller than 0, the chief sheave 20 is urgently opened (fully opened). If the front sensor value SF is larger than the rear sensor value SR, it is determined that some abnormality has occurred and automatic control is performed. Emergency stop.

In the configuration as described above, when automatically controlling the opening amount of the chaff sheave 20, wind speed sensors 26F and 26 are provided above the end of the chaff sheave 20 to detect the wind speed of the sorting wind blown from the chaff sheave 20.
R for automatically controlling the opening amount of the chaff sheave 20 based on the detection signals of the wind speed sensors 26F and 26R.
The opening amount control according to the actual processing amount of the chaff sheave 20 becomes possible. That is, since the wind speed of the sorted wind that blows from the chaff sheave 20 changes according to the actual processing amount in the chaff sheave 20, the processing status of the chaff sheave 20 is accurately determined based on the detection values of the wind speed sensors 26F and 26R. The opening amount control with high accuracy can be performed based on the judgment, and as a result, compared with the conventional one in which the opening amount control is performed based on the amount of the object to be processed detected on the oscillating flow plate 8. Sorting accuracy can be improved.

Moreover, the wind speed sensors 26F, 26R
Is a non-contact type sensor, so that there is almost no possibility of damaging the object to be sorted, and the durability of the sensor can be improved.

The wind speed sensors 26F and 26R are
Since a plurality of mounting positions are provided so that the front-rear mounting position and the left-right mounting position are different from each other, the reliability of the wind speed sensor value can be increased, and the processing status of the chief sheave 20 can be determined by comparing the plurality of wind speed sensor values. Since the determination can be made in detail, there is an advantage that it is not permissible to perform highly accurate opening amount control, and it is possible to determine an abnormality such as a sensor failure.

The wind speed sensors 26F and 26R are
Since it is attached using the lower surface of the return pan 25 disposed above the end of the chaff sheave 20, there is no need to separately provide a sensor bracket, or protect the wind speed sensors 26F and 26R from falling objects. Generation of a detection error can be prevented as much as possible.

It should be noted that the present invention is not limited to the above-described embodiment. For example, in the case where the filtering and sorting section is configured in multiple stages as in the present embodiment, the filtering and sorting body at each stage can be used. It is possible to adjust the opening amount freely, and it is possible to automatically control these opening amounts based on the wind speed sensor values, and in this case, the opening amount of each filtering and sorting body is appropriately controlled, so that the sorting accuracy is improved. Can be further improved. Also, the amount of opening of the filtration and sorting unit can be controlled in combination with another type of sensor (such as a float sensor) without controlling based on only the wind speed sensor value. , It is possible to further improve the accuracy of the opening degree control.

[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 a threshing unit showing a mounting state of a wind speed sensor.

FIG. 3 is a plan view of the same.

FIGS. 4A and 4B are schematic side views of a main part comparing a conventional example and the present invention.

FIG. 5 is a block diagram showing input and output of a control unit.

FIG. 6 is a flowchart showing a main routine.

FIG. 7 is a flowchart showing a closing subroutine.

FIG. 8 is a flowchart showing an opening subroutine.

[Description of Signs] 1 Threshing unit 8 Oscillating flow plate 9 Filtration and sorting unit 10 Karamino fan 20 Chaff sieve 21 Grain sieve 22 Motor 24 Control unit 25 Return pan 26 Wind speed sensor

Continuing from the front page (72) Inventor Misao Kitasaka 667, Iyacho, Oji, Higashi-Izumo-cho, Yatsuka-gun, Shimane Inside Mitsubishi Agricultural Machinery Co., Ltd. (72) Inventor Makoto Iwakura 667, Iya-cho, Higashi-Izumo-cho, Yatsuka-gun, Shimane 1 Mitsubishi Agricultural Machinery Co., Ltd.

Claims (3)

[Claims] 1. A filtering / separating unit having an opening degree control mechanism is provided at the end of a rocking flow plate for transporting threshed to-be-sorted materials, and the to-be-sorted materials leaking from the filtering and sorting unit are filtered by a Karamine fan. In the threshing machine that is carefully selected by the sorting wind, a wind speed sensor that detects a wind speed of the sorting wind that is blown up from the filtering sorting unit is provided at a position above the filtering sorting unit, while a sorting control unit that controls an opening degree adjustment mechanism is provided. A threshing machine provided with automatic opening degree control means for automatically controlling the opening degree of a filtering and sorting unit based on a detection signal of a wind speed sensor. 2. The threshing machine according to claim 1, wherein a plurality of wind speed sensors having different mounting positions in the front-rear direction are provided at a position above the filtering and sorting unit. 3. The threshing machine according to claim 1, wherein a return pan is disposed above an end of the filtration and sorting section, and a wind speed sensor is mounted below the return pan.