JPS6227051Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic direction control device for a combine harvester using a single-sided sensor.

Conventionally, an automatic direction control device using a single-sided sensor sends a direction signal toward the uncut area when the sensor is not in contact with the grain culm. required a grain culm detection sensor to turn off the automatic control circuit. Further, the grain culm detection sensor is generally provided at the starting end of the grain culm conveying device, and therefore, the grain culm that comes into contact with the direction sensor reaches the grain culm detection sensor with a time delay after being harvested. The direction sensor does not operate at the start of mowing, and the automatic direction control does not operate after the start of mowing.
It was activated after a predetermined period of time. In addition, to prevent the direction control from immediately operating due to gaps between plants or missing plants,
A timer was interposed in the single-sided sensor automatic direction control device so as to operate only when a turning signal toward the unmown area continued to be transmitted for a predetermined period of time. For this reason, the response performance deteriorates due to the time delay at the start of reaping and the timer, and there are cases where it is not possible to follow the grain culm rows. In addition, as shown in Japanese Patent Application Laid-Open No. 53-103820, a second sensor is provided opposite to the direction sensor, and the uncut area side turning is performed based on the fact that the grain culm is not in contact with the sensor rod of the direction sensor. An automatic direction control device has been devised in which the aircraft is turned around only when a second sensor also issues a turn command in the same direction. By the way, in this device, if the rods of both sensors facing each other are installed in a wrapped manner, a portion that senses the grain culm will be created, which will hinder accurate direction control, so there is a limit to the length of both sensor rods. .
As a result, the sensing area of the second sensor becomes short, and in the case of a wide space between plants, the turning command to the uncut area side may be interrupted intermittently, and there is a risk that accurate and quick control may not be performed. It was hot.

Therefore, in the present invention, the sensor rod of the grain culm detection sensor is provided to face the sensor rod of the direction sensor, and the switch for directing the direction sensor to the uncut area side and the switch of the grain culm detection sensor are connected in series. In addition, the sensor rod of the grain culm detection sensor is provided with its root portion first facing forward, and further formed into a curved shape so as to face the direction sensor rod, and the tip portion is formed into a straight shape, and It is an object of the present invention to provide an automatic direction control device for a combine harvester that eliminates the above-mentioned drawbacks.

Hereinafter, the present invention will be specifically explained based on an embodiment shown in the drawings.

As shown in FIGS. 1 and 2, the reaping section 1 of the combine has a plurality of large and small dividers 3 supported by a divider frame 2. Further, a lifting device 5 is arranged above the divider 3, and a lifting device 5 is arranged above the divider frame 2.
A cutting blade 6 is disposed at the rear of the blade. Further, a direction sensor 7 is provided on the frame 2a on the already-cut area side, that is, behind the right-most large divider 3a, and the sensor 7 protrudes from the inside, that is, on the already-cut area side, toward the second small divider 3b. It has a linear sensor rod 7a. Also,
A grain culm guide 8 is provided on the frame 2b of the small divider 3b at an angle similar to the divider 3, and the grain culm guide 8 is provided with a grain culm detection sensor 10.
is provided. The grain culm detection sensor 10 has a sensor rod 10a that protrudes toward the direction sensor rod 7a, and the tip of the rod 10a is separated from the tip of the sensor rod 7a of the direction sensor by a small gap, or is separated by a slight gap. It's rapping. The sensor rod 10a
As shown in detail in FIG. 3, the base portion A is first provided facing forward, and the sensor rod 7a is
It is formed in a curved shape so as to face, and the tip portion B is formed in a straight line. On the other hand, the direction sensor 7 has a case 11, as shown in FIG. 4, and a shaft 12 is rotatably supported in the case 11. A sensor rod 7a is fixed to one end of the shaft 12 protruding outside the case 11, and two cams 13, 1 are fixed to the other end inside the case.
5 are provided with different phases. In addition, there are two limit switches 1 inside the case 11.
6 and 17 are installed, and switches 16 and 17 are installed.
are actuated by cams 13 and 15, respectively. Furthermore, a bracket 18 fixed to the middle part of the shaft 12 and an adjustment screw 20 screwed into the case 11 are provided.
A return spring 21 is installed between the
The sensor rod 7a is always biased to the position shown in FIG. Note that the limit switch 16 is set to be in the ON state when the sensor rod 7a is located in the range a, and the limit switch 17 is set to be in the ON state when the sensor rod 7a is located in the range c, so that the sensor rod 7a is in the ON state. When located in range b, both switches 16 and 17 are in the OFF state. Further, as shown in FIG. 5, the grain culm detection sensor 10 has a shaft 23 that is rotatably supported by a case 22, and a sensor rod 10a is attached to one end of the shaft 23 that protrudes outside the case. A cam 25 is fixed to the shaft 23 inside the case. Further, a torsion spring 26 is arranged so as to surround the shaft 23.
One end of the sensor rod 6 is fixed to the grain guide 8, which is a fixed member, and the other end is fixed to the cam 25, so that the spring 26 always biases the sensor rod 10a to the position shown in FIG. Also, case 2
2 has a limit switch 27 set,
The switch 27 is turned on by rotation of the cam 25. Further, as shown in FIG. 6, the direction sensor 7 switches 16 and 17 are wired in parallel, and the left turning command switch 16 disengages the clutch of the left crawler via the switch 27 of the grain culm detection sensor 10. Solenoid valve solenoid 2
8, and the right turn command switch 17 is connected to a solenoid 30 for disengaging the clutch of the right crawler. In addition, 31 in FIG. 6 is a battery, 32 is a switch for automatic operation, and 33 in FIGS. 3 and 7 is a grain culm.

Since this embodiment has the above-described configuration, when the grain culm 33 and the combine harvester are in a normal relationship as shown in FIG. The limit switches 16 and 17 are rotated to range b in the figure, and both limit switches 16 and 17 are rotated.
is in the OFF state. As a result, both solenoids 28 and 30 for direction control do not operate, and the combine moves straight. Next, when the stock is missing as shown in FIG. Grain culm detection sensor sensor rod 1
0a also does not come into contact with the grain culm, but is returned by the spring 26, and the switch 27 is turned OFF. Therefore, the solenoid 28 is not energized and the combine moves straight. In addition, even when the combine harvester advances to the headland at the edge of the field, the combine harvester will continue to advance straight as in the case of missing plants, and even if the direction sensor rod 7a rotates to range a between grain culms, , similarly the combine goes straight. Next, as shown in Fig. 7 (c), if the combine harvester is too close to the uncut side with respect to the grain culm row, the sensor rod 7a of the direction sensor rotates to the range c in Fig. 4, and turns clockwise. Turn on the command switch 17. This results in
The solenoid 30 is energized and the solenoid valve is operated to change the direction of the combine to the right, that is, to the side of the already cut area. In addition, as shown in FIG. 7D, if the combine harvester is too close to the already cut area with respect to the grain culm row, the grain culm 33 does not come into contact with the sensor rod 7a of the direction sensor, and the rod 7a range a
Turn the switch 16 to the ON state. At the same time, the sensor rod 10a of the grain culm detection sensor is rotating in contact with the grain culm 37, so the switch 27 is in the ON state. Therefore, the solenoid 28 is energized and the solenoid valve is operated to change the direction of the combine to the left, that is, to the unmown area. At this time, the sensor rod 10a of the grain culm detection sensor 10, as shown in detail in FIG.
Since the base part A has a curved part, the conventional sensor rod 10 has a straight shape as shown by the chain line.
As the radius of rotation R becomes larger compared to a′,
The starting position of the grain culm in contact with the sensor rod 10a becomes earlier, and therefore the working distance L, that is, the detection time becomes longer. As a result, when the switch 16 of the direction sensor 7 commands a left turn, the switch 27 is activated.
This turns off and prevents the combine from moving straight. In addition, as shown in Fig. 7E, when horizontal mowing or scattering, the dividers 3a and 3b are
There are two or more grain culms 37 between them, but as mentioned above, if the grain culms at the end of the already-cut section are normal to the combine, they will go straight, and if they are off to the already-cut section, they will go straight to the combine. If it deviates to the side of the uncut area, the direction is changed to the side of the uncut area.

In addition, in order to increase the working distance of the sensor rod 10a of the grain culm detection sensor 10, it is possible to form it in a straight line and install it diagonally so that the tip is located in front of the rotation fulcrum. In this case, the grain culm receives a force directed toward the rotational fulcrum from the oblique sensor rod along its inclined surface, and the smoothness of the sensor rod impedes rotation.

As explained above, according to the present invention, since the sensor rod 10a of the grain culm detection sensor 10 is provided so as to face the sensor rod 7a of the direction sensor 7, there is a delay in the transportation of the grain culm to the grain culm detection sensor, and there is no problem of missing plants. There is no need for a timer that takes into account
Therefore, there is no response delay and accurate direction control can be performed. In addition, there is no need to change the sensor or circuit under all planting and reaping conditions, so there is no need to change the switch depending on the planting and reaping conditions, and the operator can simply turn the switch 32 for automatic operation. All you have to do is operate it for the first time, and you are freed from the hassle of operation. Further, since the switch 27 of the grain culm detection sensor 10 is connected only to the switch 16, which is turned on based on the fact that the grain culm does not come into contact with the sensor rod 7a of the direction sensor 7 (uncut area turning command), the direction sensor rod 7a The grain culm detection sensor 10 detects turning in the direction (already cut area side) based on the fact that the grain culm comes into deep contact with the grain culm.
Regardless of the situation, it can always operate with good response. In addition, sensor rod 1 of the grain culm detection sensor
0a with its root part A facing forward first,
Furthermore, since it is formed in a curved shape to face the direction sensor rod 7a, and is formed in a straight line at the tip B, the working distance L, that is, the detection time can be lengthened, and even when the distance between plants is wide, it is possible to It is possible to prevent the switch 27 of the culm detection sensor 10 from being turned off.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the reaping section of the combine harvester to which the present invention is applied, Fig. 2 is a side view thereof, Fig. 3 is a plan view showing the grain culm detection sensor rod, and Fig. 4 is a plan view showing the direction sensor. 5 shows a grain culm detection sensor, a is a partially sectional plan view, b is a side sectional view, a is a plan sectional view, b is a side sectional view, and FIG. The circuit diagram and FIG. 7 are plan views for explaining the operation of the present invention. 1... Combine harvester (reaping section), 2a... Already cut section side end divider frame, 2b... Adjacent divider frame, 3a... Divider, 3
b... Adjacent divider, 7... Direction sensor,
7a...sensor rod, 10...grain culm detection sensor, 10a...sensor rod, 16...one (uncut area side turning command) switch, 17...other (already cut area side turning command) switch, 28,3
0... Solenoid for left and right side clutches, 27...
...Grain culm detection sensor switch, A...root part,
B...Tip part.

Claims (1)

[Scope of utility model registration request] A direction sensor having a sensor rod protruding inward is provided on the divider part at one side end of the machine, and when the sensor rod is in a neutral position where it contacts the grain culm at a predetermined position, when one side is in an upright state from the neutral position, In a combine harvester, one switch is turned on, and the other switch is turned on when the grain culm is in deep contact and has rotated significantly from the neutral position, and automatic direction control is performed by operating the left and right side clutches based on these switches. A culm detection sensor is provided in a divider portion adjacent to the divider in which the direction sensor is installed, and a sensor rod that turns on the switch based on contact with the grain culm is provided opposite to the direction sensor rod. furthermore, a switch for the grain culm detection sensor is interposed in series with one of the switches, and a sensor rod for the grain culm detection sensor is provided with its root portion first facing forward, and is further curved so as to face the direction sensor rod. An automatic direction control device for a combine harvester, which is formed into a shape with a linear shape at the tip.