JPH0139155Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention changes the insertion length of grain culms into the handling chamber by appropriately swinging and displacing a handling depth adjustment mechanism, such as a vertical conveyance chain, about a pivot axis. The present invention relates to an automatic control device for a combine harvester that adjusts its handling depth.

Conventionally, as shown in Japanese Utility Model Application Publication No. 53-162032, there has been a technique in which a scale is attached to a working depth setting device to display the working depth amount.

However, the above-mentioned conventional technology has functional problems such as being able to only confirm the initial setting depth using the setting device, but not being able to detect and display the depth of treatment of the depth adjusting mechanism. .

Furthermore, as shown in Japanese Utility Model Application Publication No. 54-154248, conventional displacement detection was performed by connecting a detection means to the center of rotation. There were structural problems, such as the need for a new model, lack of compatibility with multiple models, and the inability to easily assemble it by retrofitting.

However, the present invention includes a sensor arm that is kept in contact with the vicinity of the handling depth adjustment fulcrum of the handling depth adjustment mechanism, and the sensor arm is displaceable following the handling depth adjustment operation of the handling depth adjustment mechanism. The present invention is characterized in that it is attached to the machine side and configured to detect the amount of handling depth of the handling depth adjustment mechanism based on the amount of displacement of the sensor arm.

Therefore, since the handling depth amount of the handling depth adjustment mechanism can be detected by the displacement of the sensor arm that follows the handling depth adjustment operation, the actual handling depth amount can be detected and displayed accurately, and the sensor The arm can be easily attached by post-assembly, and the structure is compatible with many models, making it easy to install.

Embodiments of the present invention will be described in detail below based on the drawings.

Fig. 1 is a side view of the combine harvester, and Fig. 2 is a plan view of the same. In the figure, 1 is a truck frame to which a running drive transmission 2 is attached, and 3 is a drive sprocket installed on both sides of the truck frame 1 via a running drive sprocket 4. 5 is a machine base supported by the track frame 1; 6 is a threshing section with a feed chain 7 stretched on the left side and a handling cylinder 8 built therein; Machine stand 5
14 is a straw cutter that faces the end of the straw removal chain 15; 16 is a straw collection table; 17 is an engine that drives each part of the combine; 18 2 is a paddy tank that faces the grain lifting cylinder 19 and stores the grains taken out from the threshing section 6; 20 is a driver's cab equipped with a driver's seat 21 and a driving operation section 22; side clutch levers 23, 23 and a reaping and threshing clutch lever; 2
4 and 25 in front of the driver's seat 21, a travel gear shift lever 26 is installed inside the driver's cab 20 on the left side of the driver's seat 21, and a main clutch pedal 27 is installed in the driver's cab 20, so that the grain culm can be continuously It is configured to reap and thresh.

As shown in FIG. 3, the grain culm conveyance mechanism 13 includes a vertical conveyance chain 28 which is a handling depth adjustment mechanism,
The reaped grain culm whose culm has been cut by the cutting blade 12 is conveyed to the starting end of the feed chain 7 by the chain 28, and the handling depth adjustment fulcrum shaft 29, which is the rotation center position, is A vertical conveyance chain 28 is supported at the center so as to be able to swing freely, and the terminal end of the chain 28 is moved toward and away from the starting end of the feed chain 7 to adjust the handling depth. Piston rod 31 of hydraulic cylinder 30 that adjusts handling depth
is connected to the vertical conveyance chain 28 via the vertical conveyance drive case 32 and the connecting plate 33, etc., and when the piston rod 31 is extended, the inclined upper end side of the vertical conveyance chain 28 is protruded to the outside of the machine body through the swing link 34, thereby allowing shallow handling. At the same time, when the piston rod 31 is contracted, the vertical conveyance chain 28 is retracted into the inside of the machine body to bring it into a deep handling state.

As shown in FIG. 4, a sensor box 37 of a handling depth sensor 36 is attached and fixed to a fixed bracket 35 fixed to the machine body near the fulcrum shaft 29, and the box 37 has a built-in potentiometer. The proximal shaft case 38 of the conveyance transmission case 32
to the sensor arm 4 via the sensor spring 39.
0 in contact and held, the displacement amount of the vertical conveyance chain 28 is detected by the potentiometer of the sensor box 37, and the handling depth state is displayed on the liquid crystal display 41.
The screen is configured to be displayed on 42 liquid crystal panels.

In addition, 43, 44, 45 are the handling ports 46 of the threshing section 6.
These are sensors for shallow handling, neutral handling, and deep handling installed in the front.

As shown in FIG. 5, right and left steering sensors 4 for steering control are mounted on the left and right reaping frames 46 of the reaping section 9.
7, 48 are provided, and the distance from the uncut grain culm is detected by the sensors 47, 48, and when the distance between the sensors 47, 48 and the uncut grain culm changes as the aircraft moves to the right or left, this The sensor switches 49, 50 and 51, 52, 53 of the sensors 47, 48 are configured to be turned on and off as appropriate by means of their sensor switch operation pieces 54, 55, and the sensor 47 is configured to be turned on and off as appropriate by means of sensor switch operation pieces 54, 55. , 48, the sensors 47, 48 are displaced by the spring force of sensor springs 56, 57 incorporated in the sensors 47, 48, and the switches 50, 53 are turned on or off. It consists of

FIG. 6 shows an automatic control circuit diagram, which includes a battery 58, a key switch 59, and a threshing switch 60.
The reaping switch 61 is connected to the circuit through the circuit, and the switches 49, 50, 51, 52, 53 of the right and left sensors 47, 48 are connected in parallel to the automatic steering control device 63 having the automatic switch 62. The reaping switch 61 is connected.

In addition, the shallow handling sensor 43 and the neutral sensor 44
and each switch 43a, 44 of the sensor 45 to be treated
The mowing switch 61 is connected to an automatic mowing depth control device 66 having an automatic switch 65 via the mowing height sensor 67 and the manual mowing height switch 68 in parallel. The reaping switch 61 is connected to an automatic reaping height control device 70 having an automatic switch 69 through the reaping switches in parallel.

Furthermore, it has an off delay circuit 71 and a timer 72 in parallel with the shallow handling sensor switch 43a,
The off-near circuit 71 is connected to one input side of an OR circuit 74 via a level detector 73, and the switches 49 and 53 are connected to the other input side of the OR circuit 74 via an AND circuit 75. I'm letting you do it.

On the other hand, the manual priority switch 76, main clutch disengagement operation detection switch 77, and main shift neutral operation detection switch 78 are connected via AND circuits 79 and 80.
It is also provided with a flip-flop circuit 83 for inputting the timer 72 through a level detector 81 and a not circuit 82, respectively, and connects the flip-flop circuit 83 and the OR circuit 74 to an AND circuit 84.
Drive circuit 86 for row end warning buzzer 85 via
It is connected to. Further, a NOR circuit 8 has an input side connected to the manual cutting height switch 68 and the OR circuit 74 via an on-delay circuit 87.
8 is connected to the flip-flop circuit 83. When the vehicle is running and the switch 49 is on and the switch 53 is off, which is the so-called condition end state, or the shallow handling sensor switch 4 is turned on.
3a is off and the grain culm is in a non-threshing state, the buzzer 8
5 and the switches 77, 78
When any one of the above-mentioned buzzer 85 is turned on and the vehicle is stopped, the operation of the buzzer 85 is stopped.

The present embodiment is configured as described above, and when the vertical conveyance chain 28 is oscillatedly displaced to the shallow handling side or the deep handling side by the expansion/contraction operation of the hydraulic cylinder 30, the handling depth sensor 36 is Sensor arm 40
is also displaced following this, and the amount of displacement is displayed on the liquid crystal panel 42 of the display 41 via a potentiometer built in the sensor box 37,
By looking at this, the operator can easily sense the depth of grain handling during the operation.

Furthermore, when the work reaches the end point of the work strip, a row end warning buzzer 85 sounds to notify the worker.
Conventionally, when traveling is stopped by operating the traveling gear shift lever 26 to neutral or by disengaging the main clutch pedal 27 during the course, the right and left sensors 47, 48 are activated.
is in a free state and does not perform the row detection operation, and even in this case, the buzzer 85 sounds and a false alarm of the end of the row is issued to the operator. , 48 are in a free state and are not performing line detection, the buzzer 85 does not sound when the main clutch is disengaged or the main gear is in neutral, that is, when the vehicle is stopped, and the buzzer 85 is not activated. The buzzer 85 is made to sound only when the row non-detection signals from the sensors 47 and 48 are detected.As a result, false alarms of the end of the row are prevented when the vehicle is stopped, and the buzzer 85 is activated during work. Only the end of the row can be known by the ringing of 85.

As is clear from the above embodiments, the present invention includes a sensor arm 40 that is kept in contact with the vicinity of the handling depth adjustment fulcrum 29 of the handling depth adjustment mechanism 28, and the handling depth adjustment operation of the handling depth adjustment mechanism 28. The sensor arm 40, which is displaced in accordance with Sensor arm 40 that follows adjustment movements
Since the handling depth amount of the handling depth adjustment mechanism 28 can be detected based on the displacement of the handling depth adjustment mechanism 28, the actual handling depth amount can be accurately detected and displayed, and the sensor arm 40 can be easily installed by retrofitting. It has practical effects such as a structure that is compatible with many models and easy to install.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is an overall side view of the combine harvester, Fig. 2 is a plan view of the same, Fig. 3 is an enlarged explanatory view of the main parts, and Fig. 4 is an illustration of the main parts. FIG. 5 is a partially enlarged plan view, FIG. 5 is an explanatory plan view of the steering sensor section, and FIG. 6 is an automatic control circuit diagram of the main part. 28... handling depth adjustment mechanism, 29... rotation center position, 36... handling depth sensor.

Claims (1)

[Scope of utility model registration request] This machine is equipped with a sensor arm 40 that is kept in contact with the vicinity of the handling depth adjustment fulcrum 29 of the handling depth adjustment mechanism 28, and is displaced in accordance with the handling depth adjustment operation of the handling depth adjustment mechanism 28. An automatic control device for a combine harvester, characterized in that it is attached to the side 37 and is configured to detect the amount of handling depth of the handling depth adjustment mechanism 28 based on the amount of displacement of the sensor arm 40.