JPS6345134Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a combine harvester equipped with a steering control device, specifically, a steering sensor that detects the position of the machine relative to the grain culm at the front of the machine, and a grain culm lifting claw with a grain culm lifting claw. a device configured to output a detection signal from the steering sensor to a steering device to correct the direction of the aircraft, and a grain culm lifting device having grain culm scraping claws in front of the grain culm pulling device. This invention relates to a combine harvester in which a culm scraping device is removably attached.

Generally, with this type of combine harvester, if the grain culms planted in the field are intertwined with each other between rows, a scraping device is installed in front of the hoisting device to separate the intertwined grain culms from both sides. However, in this case, the distance from the steering sensor to the tip of the raking device becomes longer, and the time it takes for the grain culm that has been raked by the raking device to reach the steering sensor becomes longer. There is a time delay in the detection of the grain culm by the steering sensor, and when the steering device is operated based on the output signal from this sensor to correct the direction of the aircraft, the tip of the scraping device must be able to detect the grain culm to be harvested. If the grain culm is left on the already cut side, or
There was a problem in which the grain culm rows on the uncut side were penetrated and more grain culm rows than the set number of reaping rows were harvested.

The present invention was devised to solve such problems, and includes an adjustment means for adjusting the output from the steering sensor to the steering device, and a detection switch for detecting the attachment of the grain culm scraping device. When the culm scraping device is installed, the adjustment means is operated by the detection switch to adjust the direction correction force of the machine body to prevent uncut grain culms and reaping of uncut rows of grain culms. It is.

The combine harvester of the present invention will be explained below with reference to the drawings.

1 and 2 partially omit the combine harvester to show the reaping device at the front of the machine, and this reaping device 1 has four first to fourth support rods 2a, 2b, 2c and 2d are provided protrudingly at equal intervals, and a grass division plate 3 is provided at the front end of each of the support rods 2a to 2d, and between each of the grass division plates 3 is a grain culm with a grain culm pulling claw 4. A lifting device 5 is provided in the vertical direction, and a cutting blade 6 is horizontally suspended at a lower position on the inside of the lifting device 5, so that the grass dividing plate 3 is moved as the aircraft advances.
The grain culms separated by the grass are raised by the pulling device 5 and are to be harvested by the cutting blade 6,
The grain culm harvested by this reaping device 1 is supplied to a threshing device mounted on the rear side of the machine body for threshing processing.

Further, among the support rods 2a to 2d of the reaping device 1, the first support rod 2a located at the outermost side has a grain culm detection piece 7a extending inward in the machine body in the lateral direction of the machine body movement.
Attach the steering sensor 7 with the detection piece 7a.
By contacting the grain culm with the grain culm, the aircraft's position relative to the grain culm is detected and the aircraft's steering is automatically controlled.
This point will be explained in detail later.

Reference numerals 8 and 8 designate a grain culm scraping device in which a number of scraping claws 8b, 8b are rotatably supported by scraping cases 8a, 8a, and each scraping device 8, 8 is located in front of the lifting device 5. It is removably attached at a position facing the first and third support rods 2a, 2c, and when this attachment is done, a portion of the scraping claws 8b, 8b is moved forward from the front end surface of the cases 8a, 8a. As the scraping claws 8, 8b rotate, they scrape apart the entangled grain culms and feed them between the support rods 2a to 2d.

Incidentally, when the raking devices 8, 8 are attached to the reaping device 1, the grass dividing plate 3 provided on the first and third support rods 2a, 2c is to be attached in front of each raking device 8.

On the other hand, the system is configured to output a detection signal from the steering sensor 7 to the steering device 10 via a steering control circuit as shown in FIG. 3, thereby controlling the steering of the aircraft.

That is, the steering device 10 is composed of electromagnetic brakes that brake the left and right crawlers at the bottom of the fuselage, for example, and the solenoids SOL-L and SOL-R in both electromagnetic brakes are connected to a power source E via a key switch SW. On the other hand, a potentiometer 11 equipped with a movable rod 11a that operates in conjunction with the detection piece 7a of the steering sensor 7 is provided, and the meter 11 is connected to a power source E via a constant voltage device 12 and a key switch SW. And a branch line 13 is connected between the potentiometer 11 and the voltage regulator 12.
A variable resistor VR ₁ and two fixed resistors VR ₂ and VR ₃ are interposed on the line 13.

In addition, two first and second comparators 14, 1
5 is provided to connect the high voltage side terminal of the first comparator 14 and the low voltage side terminal of the second comparator 15 to the output section of the potentiometer 11, and to branch the low voltage side terminal of the first comparator 14. The high voltage side terminal of the second comparator 15 is connected between the resistors VR ₁ and VR ₂ of the line 13 and between the resistors VR ₂ and VR ₃ of the branch line 13, and each output section of the comparators 14 and 15 is and gate 16,1
7 and the input terminal of a pulse generator 18, and the output section of this pulse generator 18 is connected to each other input terminal of AND gates 16 and 17. The output terminal is connected to each switching circuit 19, 20 of the solenoids SOL-L and SOL-R.

Note that 21 in the figure is an on-delay for smoothing the output from the first comparator 14.

In addition, SW is a grain culm conveyance detection switch,
It is turned off when the grain culm is being transported, and is turned on when the grain culm is no longer being transported, switching the switching circuit 22 to the energized state, and thereby each solenoid SOL-L,
This demagnetizes the SOL-R and causes the aircraft to fly straight.

However, the present invention provides a combine harvester equipped with the above-mentioned steering control device, in which the steering sensor 17
Potentiometer 1 based on detection of grain culm by
1 to the steering device 10, and a detection switch to detect the attachment of the grain culm scraping devices 8, 8. 2 resistors
VR ₄ and VR ₅ are used, and the resistors VR ₄ and VR ₅ are incorporated into the pulse generator 18, and the detection switch 23 is connected to the grain culm triggering device to which the grain culm scraping device 8 is attached as shown in FIG. It is provided in the device 5 and is configured to be pushed when the scraping device 8 is installed.
The switching contact SW ₂ of this detection switch 23 is incorporated into the pulse generator 18 together with the resistors VR ₄ and VR ₅ , and the configuration is such that this contact SW ₂ is used to select the resistors VR ₄ and VR ₅ . .

The resistors VR ₄ and VR ₅ change the on-width of the pulse signal output from the pulse generator 18, and when the resistor VR ₄ with a small resistance value is selected, the on-width of the pulse signal is small. ,solenoid
When the excitation time of SOL-L and SOL-R is shortened and the resistor VR ₅ with a large resistance value is selected, the ON width of the pulse signal is large and the solenoid SOL-L,
As the excitation time of SOL-R becomes longer, the output to the solenoid is adjusted.

In the figure, R ₁ , R ₂ , and R ₃ are resistors built into the pulse generator 18 in order to change the on-width of the pulse signal as described above, and each of these resistors R ₁ is controlled by the manual switch SW ₃ . _{. ​}

The combine harvester of the present invention is constructed as described above, and the direction of the machine is corrected based on the detection signal from the steering sensor when reaping the grain culm, that is, the machine is positioned at the appropriate position relative to the grain culm a, as shown in Figure 2. , the detection piece 7 of the steering sensor 7 is detected by the grain culm a.
a is swung a predetermined amount toward the rear of the machine, and in conjunction with this, the movable piece 11a of the potentiometer 11 moves downward in FIG. At this time, the detection piece 7a of the steering sensor 7 is located in the neutral dead zone, the movable rod 11a of the potentiometer 11 is also located in the neutral position, and both comparators 14 and 15 do not output.

On the other hand, as shown in the imaginary line in Figure 2, when the aircraft leans to the right (already cut side) with respect to the grain culm a and the grain culm a approaches the first support rod 2a, the grain culm a allows steering. The detection piece 7a of the sensor 7a swings toward the rear of the machine, and in conjunction with this, the movable rod 11a of the potentiometer 11 moves downward from the neutral position in FIG.
The output (voltage) from this meter 11 increases, and when the machine body shifts to the left (uncut side) with respect to the grain culm a and the grain culm a separates from the first support rod 2a, the grain culm a The contact of the grain culm a with the detection piece 7a disappears, or the contact of the grain culm a with the detection piece 7a becomes shallow, and this detection piece 7a swings forward of the machine, and accordingly, the potentiometer 11 changes. Movable rod 1
1a moves upward from the neutral position in FIG. 3, and the output (voltage) from this meter 11 becomes low.

Thus, depending on the voltage output from the potentiometer 11, the comparator 14 or 15
An output is made from potentiometer 1.
If the output from the comparator 1 is higher than the set voltage by the comparator 14, an output is made from this comparator 14, and if it is lower than the set voltage by the comparator 15, an output is made from this comparator 15, and the output from each comparator 14 or 15 is The output is inputted to each one input terminal of the AND gate 16 or 17 and the pulse generator 18, and is inputted from the pulse generator 18 to each other input terminal of the AND gate 16 or 17 as a pulse signal, This allows AND gate 16
or 17 to switching circuit 19 or 20
This output is a pulse signal that turns each switching circuit on and off, and the solenoid SOL-L or SOL- of the steering device 10.
R is intermittently excited to correct the direction of the aircraft to the right or left.

If the grain culms to be harvested are planted relatively neatly between the rows, the grain culm ripping device 8 is not attached to the grain culm and the grain is harvested, and in this case the detection switch 23 is not pressed; 23 switching contacts
SW ₂ selects resistor VR ₄ and said pulse generator 1
Since the ON width of the pulse signal output from 8 is reduced, the solenoid SOL-L or SOL-
The intermittent excitation time of R becomes shorter, the output signal of the so-called solenoid becomes smaller, and the direction of the aircraft is corrected relatively slowly.

On the other hand, when the grain culms to be harvested are intertwined with each other between rows, a grain culm scraping device 8 is attached in front of the grain culm lifting device 5 to harvest the grain culms. The detection switch 23 is pushed,
The switching contact SW ₂ of the switch 23 selects the resistor VR ₅ and increases the ON width of the pulse signal output from the pulse generator 18, so that the intermittent excitation time of the solenoid SOL-L or SOL-R is reduced. As the length increases, the output signal to the so-called solenoid becomes larger, and the aircraft's direction is quickly corrected.

As explained above, in a combine harvester equipped with a steering control device according to the present invention, when a grain culm raking device is installed in front of a grain culm pulling device in order to scrape and reap grain culms that are intertwined with each other between rows, The detection switch that detects the attachment of the grain culm scraping device operates the adjustment means that adjusts the output to the steering device to increase the direction correction force of the aircraft. As the distance from the steering sensor to the tip of the raking device becomes longer, it takes longer for the grain culm that has been raked by the raking device to reach the steering sensor, making it difficult for the so-called steering sensor to detect the grain culm. Even if a time delay occurs, it can be compensated for by increasing the direction correction force of the machine, so that grain culms that should be harvested are left uncut on the harvested side, and the raking device is placed in rows of grain culms on the uncut side. This has made it possible to prevent the cutting of grain culm rows in excess of the set number of reaping rows.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a perspective view with some parts omitted, Fig. 2 is a schematic plan view of the main parts, Fig. 3 is a steering control circuit diagram, and Fig. 4 shows the main parts. FIG. 5...Grain culm lifting device, 7...Steering sensor, 8
...Grain culm scraping device, 10...Steering device, 22...
Detection switch, VR ₄ , VR ₅ ...Resistor (amplification means).

Claims (1)

[Scope of utility model registration request] The front part of the aircraft is equipped with a steering sensor that detects the aircraft position relative to the grain culm, and a grain culm lifting device with a grain culm lifting claw, and a detection signal from the steering sensor is output to the steering device, and the aircraft is In the combine harvester, a grain culm scraping device having grain culm scraping claws is removably attached to the front of the grain culm pulling device. A detection switch for detecting attachment of the grain culm scraping device is provided, and the adjustment means is operated by this switch to adjust the direction correction force of the machine body. A combine harvester equipped with a steering control device characterized by: