JP3245323B2 - Arrangement structure of layer thickness detection sensor in threshing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for disposing a layer thickness detecting sensor in a threshing machine provided in a combine or the like.

[0002]

2. Description of the Related Art In general,
In this kind of threshing machine, a layer thickness detection sensor for detecting the layer thickness of the processed material is disposed above the oscillating flow plate for transferring the processed material toward the filtering and sorting unit, and the detection value of the sensor is provided. Some types of control are performed based on the above. However,
The layer thickness of the processing object is not always flat on the oscillating flow plate, and particularly when the amount of the processing object is small, the variation in the layer thickness becomes large, so that a stable detection value cannot be obtained. Was the actual situation.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide an arrangement structure of a layer thickness detection sensor in a threshing machine which can eliminate these problems. A threshing machine comprising a layer thickness detection sensor for detecting a layer thickness of a processed material, above a rocking flow plate for transferring the processed material toward a filtration and sorting unit, At a predetermined position of the oscillating flow plate, a shift plate for shifting the processed material in the transfer process to one side is provided .
Positioning the layer thickness detection sensor near one side where the processed object can be moved, and the layer thickness of the processed material collected by the moving plate
This is an arrangement structure of a layer thickness detection sensor in a threshing machine, characterized in that it is configured to detect the thickness. According to the present invention, with this configuration, in detecting the layer thickness of the processing object on the oscillating flow plate, it is possible to perform stable layer thickness detection regardless of the amount of the processing object. .

[0004]

Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a threshing machine provided in a combine, which is a threshing machine 1 for threshing grains from stems and stems in a down-hand manner, and leaks threshed grains (processed products). Receiving net 3, rocking sorter 4 for rocking and sorting the leaked processed material, Karamin fan 5 for wind-screening the processed material, dust discharging fan 6 for sucking and discharging branch stalks and cuttings mixed in the processed material, A first funnel 7 for collecting the selected grains, a second funnel 8 for collecting the branch and stalks and ear cuttings that have been leaked, and a second funnel 8 for transporting the second product to a second reduction port 9a to be described later. A sorting chamber that accommodates the swing sorting body 4 and the like is covered with at least left and right side plates 10, and a support frame 11 is installed between the left and right side plates 10. In addition, the threshing machine 1 of the present embodiment further reduces the processed material that has reached the end of the handling chamber without leaking from the receiving net 3 into a single grain by the processing cylinder 50. The width dimension of the swing sorting body 4 is set relatively large in order to allow the processed material to leak from the position onto the swing sorting body 4 at the right end of the swing sorting body 4.

The oscillating sorter 4 comprises a corrugated oscillating flow plate 12 for transferring the processed material leaked from the receiving net 3 backward.
(Grain pan), a first filtration / separation section 13 (chaff sieve) for roughly sorting the processed material that has reached the end of the oscillating flow plate 12, and a second filtration / separation for finely sorting the processed material leaked from the first filtration / separation section 13. The two-filtration sorting unit 14 (grain sieve), a straw rack 51 that sorts the processed material and the like reaching the end of the first filtration and sorting unit 13 into a second product and a discharge, and the straw rack 5
A second flow plate 15 (return pan) or the like that integrally guides the processed material leaked from the first funnel 8 into the second funnel 8 and swings back and forth based on the operation of a swing mechanism (not shown). However, the swing sorting body 4 of this embodiment can be put in and out of the rear of the machine based on a sliding operation in the front-rear direction in order to facilitate maintenance in the sorting room.

The first filtering and sorting section 13 is composed of a large number of fins 16 oriented in the left-right direction arranged side by side at predetermined intervals in the front-rear direction. Of the upper and lower pins 16a and 16b protruding, the upper pin 16a is pivotally supported by the fixed plate 17, while the lower pin 16a is pivotally supported by the movable plate 18 in a connected manner. The opening degree of the first filtration and sorting unit 13 can be adjusted based on the integrated forward and backward swing. Further, the upper and lower pins 16 of the predetermined fin 16
The first link 19 is connected to a and 16b, and the lower end of the first link 19 is pivotally connected to the upper end of the second link 20 whose intermediate portion is pivotally supported. And the second link 2
The two ends of the operation wire 21 are connected to the upper and lower positions of a pivot point via a bullet 22, and an intermediate portion of the operation wire 21 folded in a loop is connected to a motor 23 described later.
, The second link 20 swings based on the pulling force of the operation wire 21 irrespective of whether the motor 23 is driven forward or reverse, and interlocks with the link swing. Each fin 16 swings back and forth.

The motor 23 (built-in potentiometer) is assembled to a motor bracket 25 to form a motor assembly A. The motor assembly A is detachably attached to the support frame 11 by using bolts 26. Mounted on That is, the existing support frame 11
The motor 23 is arranged in the sorting room by using the motor, so there is no risk of damaging the motor 23 due to contact with obstacles, or the motor protection cover is not required to reduce the number of parts and simplify the structure. Also contributes to. Further, the support frame 11 of the present embodiment is located forward of the rear end of the swinging sorter 4.
The motor assembly A in the vertical position (motor bracket 2
5 is mounted along the vertical and horizontal directions), so that the motor 23 is prevented from protruding from the rear end of the swinging sorter 4, and as a result, the possibility that the motor 23 comes into contact with an obstacle is reduced. In addition to being able to be further lowered, a space for disposing the dust discharge fan 6 and the like can be secured behind the swinging sorter 4. The motor assembly A is attached and detached when the swing sorting body 4 is taken in and out, but the connection between the operation wire 21 and the motor 23 does not change, so that it is not necessary to perform readjustment.

Further, in the present embodiment, it is possible to adjust the mounting angle of the motor 23 based on the flexibility of the elongated hole 25a.
Angle adjustment (initial position adjustment) can be performed. That is, when the mounting angle of the motor 23 is changed in the forward and reverse directions, the pulley 24 integrally rotates forward and backward to push and pull the operation wire 21, so that the fins 16 can be adjusted without performing outer adjustment of the operation wire 21. Can be adjusted to a predetermined angle (initial angle).

The second filtering and sorting unit 14 is disposed below the first filtering and sorting unit 13 and above the first funnel 7. Of the second oscillating flow plate 27, a crimp net (not shown) provided at the end of the second oscillating flow plate 27, a closing plate (not shown) for adjusting the opening degree of the crimp net, and the like. The closing plate is connected to a chain 30 suspended by a pair of front and rear driven sprockets 28 and a single driving sprocket 29. That is, the chain 30 is operated back and forth with forward and reverse driving of a motor 31 (built-in potentiometer) connected to the driving sprocket 29, and the second filtration is performed based on the front and rear sliding of the blocking plate interlocked with the chain operation. The opening amount of the selection unit 14 is adjusted.

On the other hand, reference numeral 32 denotes a layer thickness detecting sensor for detecting the layer thickness of the processing object on the oscillating flow plate 12, and the layer thickness detecting sensor 32 It is configured by using a detection plate 33 which is pushed by an object and swings backward, and a potentiometer 34 which detects the swing angle of the detection plate 33. As described above, the swing sorter 4 is used.
When taking in and out, the swing sorter 4 is attached to the detection plate 3
3 in particular, and especially the detection plate 33
Is pressed, there is a possibility that the detection plate 33 may be deformed or damaged, so that the detection plate 33 is also allowed to retract and swing forward.

Reference numeral 35 denotes a detection plate 3 which has been retracted and swung forward.
3 is a torsion coil spring-shaped return spring which biases the return toward the initial position. The return spring 35 is mounted on a sensor bracket 37 via a bolt 36 penetrating the coil portion. While the portion is locked by the sensor bracket 37, the other end (bent portion) contacts the front edge of the detection plate 33 to urge the detection plate 33 rearward, but contacts the detection plate 33. Since the other end of the returning rebounding machine 35 is always in contact with the outer peripheral surface of the potentiometer 34 and is locked at the initial position, it also functions as the initial position stopper of the detection plate 33 that has swung backward. It has become.

The potentiometer 34 has an outer peripheral surface formed in an arc surface centered on the detection axis, and has an angle of attachment to the sensor bracket 37 of the oblong hole 3.
It can be adjusted around the detection axis based on the flexibility of 7a. That is, the potentiometer 34
When the sensor is mounted on the sensor bracket 37, it is necessary to set the detection plate 33 to the initial position and adjust the mounting angle so that the detection value at this time becomes a predetermined value (the sensor reference value held in the memory of the control unit). However, even if the mounting angle of the potentiometer 34 is changed, the position of the outer peripheral surface of the potentiometer 34 does not change, so that the other end side of the return spring 35 can be held at the initial position so that highly accurate adjustment can be performed. Has become.

By the way, a sensor assembly B constructed by assembling the layer thickness detecting sensor 32 on the sensor bracket 37 is mounted on the right side plate 10 of the sorting chamber so as to be adjustable in height. A second return port for returning the second product to the first filtration and sorting unit 13 behind the viewing window 38 (for visually confirming the amount of the processed material on the oscillating flow plate) provided on the side plate 10. 9a, the wiring 39 and the connector 40 connected to the potentiometer 34 are located on the viewing window 38 side. That is, it is possible to stably detect the layer thickness without being affected by the second reduction, and
9 and the connector 40 are prevented from being subjected to the scattered impact of the second reduction, and the connection state of the connector 40 and the operation state of the layer thickness detection sensor 32 can be confirmed from the viewing window 38. Has become.

The detection plate 33 of the layer thickness detection sensor 32 attached as described above does not directly receive the scattered impact of the processing object leaking from the receiving net 3 and also functions to transfer the oscillating flow plate 12. In order to detect the layer thickness of the processed material that has been leveled in response to this, it is located at the right rear end of the oscillating flow plate 12,
On the left side of the position, a so-called shift plate 41 is erected in the front-rear direction. From the left half of the oscillating flow plate 12 (below the lower handling position of the handling cylinder 2), the oscillating flow with a relatively small amount of the processed material is provided by the approach plate 41. to gather the treated product to the right end portion of the plate 12, but in an inclined position closer to the right side plate 10 as the rear side is intended to be erected on the swing flow plate 12, the rear end right side near the asked plate 41 Is provided with a detection plate 33. That is, since the layer thickness of the processed object subjected to the leveling action of the approaching plate 41 is detected, highly accurate detection is possible, and even when the amount of the processed object is small, a certain amount of layer thickness is obtained. Since the detection is performed in a state amplified to the thickness, variation in the detection value can be suppressed as much as possible.

Reference numeral 42 denotes a control unit constituted by using a so-called microcomputer (including a CPU, a RAM, a ROM, and the like). The control unit 42 detects the opening degree of the first filtration / selection unit 13. Potentiometer 23a, a potentiometer 31a for detecting the opening degree of the second filtration and sorting unit 14, a potentiometer 34 for constituting the layer thickness detection sensor 32, and an automatic switch 4 for ON / OFF automatic control.
3, a threshing clutch sensor 44 for detecting the on / off state of the threshing clutch, a preprocessing lift sensor 46 for detecting the elevation height of a preprocessing unit (reaching unit) 45, a preprocessing rotation sensor 47 for detecting rotation of preprocessing power, Signals are sent from a main sensor 48 (stem culm detection sensor for automatically controlling the handling depth) 48 for detecting whether or not stalks are being conveyed in the preprocessing unit 45, and a condition dial 49 for setting the type of threshing grain and the working speed. Is input, and a control command required for each of the motors 23, 31 and the like is output based on the determination based on these input signals. That is, as shown in FIG. 13, the control unit 42 includes the first filtration and sorting unit 13 and the second filtration and sorting unit 1.
Sorting normal control for automatically increasing or decreasing the opening degree of 4 based on the thickness of the processed material, automatic sorting for switching the control according to each work state (normal work state, machine circulating state, threshing stop state) Control routines such as control are provided in advance.
A control procedure of the automatic sorting control will be described based on a flowchart. Note that the control procedure of the normal sorting control uses a general control routine, and thus detailed description is omitted.

The automatic sorting control stops the opening degree control of the first and second filtering / selecting sections 13 and 14 when the threshing clutch is in the off state, while the threshing clutch is in the on state. And the main sensor 48 is ON
In the case of, the above-described sorting normal control as a subroutine is executed, and when the threshing clutch is engaged and the main sensor 48 is OFF, or the pre-processing rotation sensor 47 When the rotation stop (in this embodiment, the stop is automatically stopped when the pre-processing unit 45 rises to the predetermined height h), it is determined that the aircraft is in the rotation state, and the rotation flag is set. The one-filtration / selection unit 13 and the second-filtration / selection unit 14 are controlled to close to the circulation control position shown in FIG. 13. The difference between the pre-processing height H1 stored at the start of the lifting operation and the current pre-processing height is a predetermined height H
(The state determined to be the above). That is, since the raising operation of the pre-processing unit 45 is added as a condition for controlling the closing of the first filtration and sorting unit 13 and the second filtration and sorting unit 14, based on the abnormality (stop) of the pre-processing rotation sensor 47 during the mowing operation. The inconvenience of closing control of the first filtration and sorting unit 13 and the second filtration and sorting unit 14 can be avoided.

In the embodiment of the present invention constructed as described above, a layer for detecting the layer thickness of the processed material is provided above the oscillating flow plate 12 for transferring the processed material to the first filtration / separation unit 13. A thickness detection sensor 32 is provided, and the layer thickness detection sensor 32 is provided in the oscillating flow plate 1 in which a large amount of processed material leaks from the receiving net 3.
Oscillating flow plate 12 with a relatively small amount of processed material from the left half of 2
Is disposed near the inside of the rear end of the approaching plate 41 for bringing the processed object to the right end of the sheet. That is, since the layer thickness of the processed object subjected to the leveling action of the approaching plate 41 is detected, highly accurate detection is possible, and even when the amount of the processed object is small, a certain amount of layer thickness is obtained. Since the detection is performed in a state amplified to the thickness, variation in the detected value can be suppressed as much as possible, and as a result, the layer thickness can be detected stably regardless of the amount of the processed material.

In addition, since the position of the layer thickness detecting sensor 32 is set at the right rear end of the oscillating flow plate 12,
It is possible to detect the level of the processed material that has been leveled by the transfer action of the oscillating flow plate 12, without directly receiving the scattering impact of the processed material leaking from the receiving net 3. As a result, the stability and detection accuracy in the layer thickness detection can be further improved.

Further, in the present embodiment, the position of the layer thickness detecting sensor 32 is changed to the viewing window 3 provided on the side plate 10.
8 and in front of the second reduction port 9a for reducing the second product to the first filtration / separation unit 13, and the viewing window 38 through the wiring 39 and the connector 40 connected to the potentiometer 34. Since it is located on the side, the layer thickness can be stably detected without being affected by the second reduction, and the inconvenience that the wiring 39 and the connector 40 are scattered by the second reduction can be eliminated.

Further, in this embodiment, when the main sensor 48 is OFF, or when the pre-processing rotation sensor 4
7 detects that the rotation of the pre-processing unit 45 has stopped, determines that the machine is in the circulating state, and closes and controls the first filtration and sorting unit 13 and the second filtration and sorting unit 14 to the circulating control position. Since the pre-processing rotation stop determination is executed only when the pre-processing unit 45 is operated to be raised by the predetermined height H or more,
As a condition for controlling the closing of the first filtration and sorting unit 13 and the second filtration and sorting unit 14, a lifting operation of the pretreatment unit 45 will be added. To prevent the first filtration / sorting unit 13 and the second filtration / sorting unit 14 from being closed, thereby increasing the amount of unprocessed materials in the sorting unit or removing unprocessed materials based on incorrect closing control. The inconvenience of discharging to the outside can be eliminated.

[0021]

In summary, since the present invention is constructed as described above, a layer for detecting the layer thickness of the processing object is provided above the oscillating flow plate for transferring the processing object toward the filtering and sorting section. A thickness detection sensor is provided, but at a predetermined position of the oscillating flow plate, a shift plate for shifting the processed material in the transfer process to one side is provided, and near the one end side of the end of the shift plate. Since the layer thickness detection sensor is located at the position above, it is possible to detect the layer thickness of the processed material collected by the shift plate. That is, even when the amount of the processed material is small, the detection is performed in a state where the thickness is amplified to a certain layer thickness, so that it is possible to minimize the variation in the detected value. Irrespective of the amount, the layer thickness can be stably detected.

[Brief description of the drawings]

FIG. 1 is an overall side view of a threshing machine.

FIG. 2 is a rear view of the main part of the same.

FIG. 3 is a plan view of a main part of the above.

FIG. 4 is a side view of a first filtration and sorting unit.

FIG. 5 is a plan view of a main part of the above.

FIG. 6 is a rear view showing a motor mounted state.

FIG. 7 is a side view of the same.

FIG. 8 is a front view of a layer thickness detection sensor.

FIG. 9 is a side view of the same.

FIG. 10 is a rear view of the same.

FIG. 11 is a block diagram showing input and output of a control unit.

FIG. 12 is a flowchart showing automatic sorting control.

FIG. 13 (A) is a graph showing the relationship between the layer thickness of the processed material and the opening of the first filtration and sorting unit, and FIG. 13 (B) is the relationship between the layer thickness of the processed material and the opening of the second filtration and sorting unit. FIG.

FIG. 14 is a timing chart showing the operation of automatic sorting control.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Threshing machine 4 Oscillating sorter 10 Side plate 11 Support frame 12 Oscillating flow plate 13 First filtering and sorting unit 14 Second filtering and sorting unit 16 Fin 21 Operation wire 23 Motor 25 Motor bracket 32 Layer thickness detection sensor 33 Detection plate 34 Potentiometer 35 Return ammunition 37 Sensor bracket 41 Approach plate 42 Control unit

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A01F 12/00-12/60

Claims (1)

(57) [Claims] 1. A threshing machine in which a layer thickness detection sensor for detecting a layer thickness of a processed material is disposed above a rocking flow plate for transferring the processed material toward a filtering and sorting unit. At a predetermined position of the dynamic flow plate, a moving plate for moving the processed material in the transfer process to one side is provided, and the processed material at the end of the moving plate is moved.
Position the layer thickness detection sensor in the vicinity of one side ,
It is configured to detect the layer thickness of the processed material collected by the shingle plate.
An arrangement structure of a layer thickness detection sensor in a threshing machine, characterized in that it is formed .