JPS6325935Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic direction control device for controlling the direction of a combine harvester so that it travels along grain culm rows.

In general, there are two types of mowing work: row mowing, in which the work is carried out along the rows, and so-called horizontal mowing, in which the work is carried out in a direction perpendicular to the rows. The installed left side sensor follows the rows on the left side of the cutting width, and during horizontal mowing, the right side sensor installed on the cut side divider section tracks the rows between the cut area and uncut area. It follows along. For this reason, direction sensors are installed on both the left and right sides, and the left and right direction sensors are switched manually depending on the cutting conditions or automatically depending on the operating status of the left and right sensors.

By the way, these left and right direction sensors are installed at a higher position than the left direction sensor because there is a risk that the right direction sensor may come into contact with waste straw, stubble, etc. and issue a false signal. There is. However, due to positional errors, if a large amount of paddy accumulates in the hopper, tank, or paddy bag in a wet field, the machine tilts to the right and the right direction sensor hits a stubble, etc., causing an error signal. There were times when I uttered.

Therefore, in the present invention, a tilt angle sensor is installed on the machine body, and when the machine body tilts beyond a set tilt angle, the automatic direction control by the direction sensor on the right side, that is, on the already cut side is cut off, thereby solving the above-mentioned drawbacks. The object of the present invention is to provide an automatic direction control device for a combine harvester.

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the combine harvester 1 has a body 3 supported by crawlers 2.
The machine body 3 has an automatic thresher 5 installed on its left side, i.e., on the uncut side, and a driver's seat 6 installed on its right side, i.e., on the cut side.
Further behind this are arranged the rice tank 7, the hopper 9 and the rice processing table 10. In addition, a pre-processing section 12 having a number of dividers 11 is supported in front of the machine body 5 so as to be able to rise and fall freely, and the left and right dividers 11a, 11b are provided with left and right direction sensors 13, 15 having inwardly protruding arms 13a, 15a, respectively.
As shown in FIG. 2a, the right or pre-cut side direction sensor 15 is connected to the left or un-cut side direction sensor 13.
The _left sensor 13 detects the base of the stalk to reduce the influence of fallen materials, etc., while the right sensor 15 is not influenced by stubble, etc. On the other hand, a tilt angle sensor 16 is installed at a prescribed position on the machine body 3 as shown in Fig. 3, which can detect the tilt angle of the machine body in the left-right direction.

As shown in FIG. 4, the right turn command switches 13r and 15r of the left and right direction sensors 13 and 15 are connected to the right solenoid 17r of the direction control solenoid valve, and the left turn command switches 13l and 15l are connected to the left direction control solenoid valve. It is connected to solenoid 17L. Further, the tilt angle sensor 16 and the reference setter 19 are connected in parallel, and a voltage comparator 20 is connected so as to compare the signals from both these sensors and the setter, and the comparator 20 constitutes a switch circuit. Output to transistor 21. Further, a relay 22 is connected to the transistor 21, and when the relay 22 is energized, the b contact 22b
get off. In addition, in the figure, 23 is a changeover switch for the left and right direction sensors 13 and 15;
26 is a main switch, 26 is a contact protection diode, and 27 is a battery.

Since the present embodiment has the above-described configuration, when the paddy tank 7 and hopper 9 are not filled with paddy and the machine body 3 is in a substantially horizontal state, the combine harvester 1 is moved to the left or right direction depending on the reaping conditions. sensor 1
The direction is controlled based on 3 and 15. That is, during row mowing work, the changeover switch 23 is manually or automatically switched to the contact point A, and the left direction sensor 13 is activated, depending on the state of contact of the arm 13a with the grain culm in the sensor 13. Then, the switches 13l and 13r are turned on and off, and the left and right solenoids 17l and 17r are energized, respectively, to control the direction of the combine harvester 1. Also, during horizontal mowing work, the changeover switch 23 is switched to contact B, the right direction sensor 15 is activated, and the sensor 1
Turn on and off switches 15l and 15r in step 5.
The direction of the combine harvester 1 is controlled by exciting the left and right solenoids 17l and 17r, respectively.

As the reaping work progresses, the paddy tank 7
If a large amount of paddy accumulates in the hopper 9 or a large amount of paddy bags full of paddy is placed on the paddy processing table 10, the center of gravity of the machine 3 shifts to the right, especially in wet fields. 3 tilts to the right, but the inclination angle of the aircraft body is greater than the inclination angle predetermined by the reference setting device 19, that is, as shown in FIG. 2b, the height of the right direction sensor 15 and the left direction sensor 13 When the difference between the two becomes almost zero and becomes a slight difference _l2 , and there is a possibility that the right direction sensor 15 will come into contact with a stubble or the like and generate a disturbance signal, the signals from the setting device 19 and the inclination angle sensor 16 will change. The voltage is compared by the voltage comparator 20, and the relay 22 is switched to the energized state via the transistor 21. Then, the B contact 22b is switched to the OFF state, and even if the changeover switch 23 is switched to the contact B and the right direction sensor 15 is in the operating state, the automatic direction control based on the direction sensor 15 is cut off.

In the above-mentioned embodiment, when the aircraft body 3 tilts at the set inclination angle, all automatic direction control based on the right direction sensor 15 is shut off, but as shown in FIG. The b contact 22b may be arranged to block only the clockwise rotation command of the sensor 15.

As explained above, according to the present invention, the aircraft 3
An inclination angle sensor 16 is installed at
Since the automatic direction control by 5 is cut off, a large amount of paddy accumulates in the paddy storage devices such as the paddy tank 7, the hopper 9, and the paddy processing table 10, causing the machine 3 to tilt and be at a high position under normal conditions. Even if the already-cut side direction sensor 15, which is set so as not to come into contact with stubble or the like, comes into contact with waste straw or stubble and issues an erroneous signal, the direction will not be controlled based on the erroneous signal. , it is possible to prevent the combine harvester 1 from being largely deviated from the row.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a combine harvester to which the present invention is applied, and Fig. 2 is a front view showing the positions of the left and right direction sensors. A diagram showing a case,
Figure 3 is a schematic front view showing the tilt angle sensor;
The figure is a circuit diagram according to an embodiment of the present invention, and FIG. 5 is a circuit diagram according to another embodiment. 1... Combine harvester, 3... Aircraft, 7, 9, 10
...Paddy storage device, 11...Divider, 13...
...Unmown (left) lateral direction sensor, 15... Already cut (right) lateral direction sensor, 16... Inclination angle sensor.

Claims (1)

[Scope of utility model registration request] In a combine that is equipped with a direction sensor at least on the divider section on the cut side and a paddy storage device on the machine body, a tilt angle sensor is installed on the machine body, and when the machine body tilts more than the set tilt angle, the direction sensor on the cut side will be detected. automatic direction control device in a combine configured to interrupt automatic direction control by