JPS63283519A - Automatic plowing depth controller - Google Patents

Abstract

PURPOSE:To reduce load or efficiently thresh grains, by selectively inputting any of a shallow-operating mode or deep-operating mode and moving a grain stalk holding position to the shallow-operating or deep-operating side when ear tips are continuously positioned in an insensitive zone. CONSTITUTION:When time is up by a timer (T) in a state of ear tips positioned in an insensitive zone, a mode selected by a mode selection switch (SW1) is checked. When a shallow-operating mode is selected, shallow-operating output is fed only for a time (t1). A shallow-operating motor (M) is rotated only for the time (t1) in the direction of arrow (A) to reduce the length from the ear tips of the grain stalks led into a thresher 3. When a deep-operating mode is selected, deep-operating output is fed only for the time (t1). The deep- operating motor (M) is rotated only for the time (t1) in the direction of arrow (B) to increase the length from the ear tips of the grain stalks.

Description

Detailed Description of the Invention (a) Industrial Application Field The present invention relates to a combine harvester equipped with a threshing device and traveling in farmland, and in particular to an automatic processing depth control device for changing the conveyance state of grain culms to the threshing device. Regarding.

(b) Summary of the Invention In summary, the automatic handling depth control device according to the present invention includes a mode selection means for selectively inputting a shallow handling mode and a deep handling mode, and a tip sensor detects that the tip is in an appropriate position. By changing the grain culm clamping position in the conveying means when it is continuously detected for a certain period of time, to the shallow handling side in shallow handling mode and to the deep handling side in deep handling mode, no additional operations are required during reaping work. This allows reaping work to be performed by selectively giving priority to either reaping efficiency or reaping accuracy.

(C) Prior Art] In a harvester, the harvested grain culm is introduced into a threshing device and separated into grains and culm waste. The threshing device includes a rotatable handling cylinder therein, and a large number of handling teeth provided on the circumferential surface of the handling cylinder are brought into contact with the grain culm. The rotational power of the handling barrel is supplied from the drive device that supplies driving force to the traveling device of the combine, and if the load on either the threshing device or the traveling device increases, the rotational power or driving force supplied to the other will also decrease. . From this, the contact resistance of the handling teeth increases as the length from the tip of the grain culm guided into the threshing device increases,
The load acting on the handling cylinder becomes thicker.

This reduces the traveling speed of the combine harvester and reduces the efficiency of the harvesting operation.

Conversely, as the length of the grain culm guided into the threshing device from the tip becomes shorter, the force acting on the handling barrel becomes smaller and the traveling speed of the combine increases. However, if the length of the grain culm guided into the threshing device from the tip is short (this means that part of the ear containing grains is not guided into the threshing device (and some of the grains remain in the ear). Grain culms are released into the interior, reducing the accuracy of reaping work.

Therefore, in the past, a sensor was provided to detect the length from the conveying means that guides the grain culm to the threshing device to the position of the tip of the grain culm held between the conveying means, and the detection value of this tip sensor was made to be an appropriate value. The grain culm clamping position of the conveying means was changed. Generally, the ear tip sensor consists of a pair of upper and lower contact sensors, and when both sensors are turned on, it is determined that the length from the conveying means to the ear tip is too long, and the grain culm clamping position is moved to the shallow handling side, and both the ear tip sensors are turned on. If it is turned off, it is determined that the length from the conveying means to the tip of the grain is too short, and the grain culm clamping position is changed to the deep handling side.

(d) Problems to be Solved by the Invention However, in the above-mentioned conventional automatic handling depth control device, the grain culm of the conveying means is arranged so that the tip of the grain culm held between the conveying means is located in the dead zone between the upper and lower ear tip sensors. Since only the clamping position was changed, the mounting position of the ear tip sensor had to be changed up or down in order to adjust the condition of the grain culm guided to the threshing device after the reaping operation started. Necessary for removing during reaping work. If the grain culm clamping position is adjusted by moving the mounting position of the ear sensor, the operator should not reach out from the cockpit and move the ear sensor (instead of forcing the operator to perform dangerous work). In addition, during reaping work, many operations are required, such as steering the steering device and raising and lowering the reaping unit, and adding the work of changing the position of the tip sensor on top of this requires the reaping operation. There was a problem that made it even more complicated.

The purpose of this invention is to enable selection of a shallow handling mode in which the grain culm clamping position is slightly changed to the shallow handling side and a deep handling mode in which the grain culm clamping position is slightly changed to the deep handling side when the position of the grain tip is appropriate, It is an object of the present invention to provide an automatic handling depth control device which can adjust the position of holding grain culms during reaping work without vertical movement, and which simplifies the reaping work and improves its safety.

(e) Means for Solving the Problems The automatic treatment depth control device of the present invention is equipped with a pair of upper and lower ear sensors for detecting the position of the ear tip of grain culms held between conveying means. An automatic handling depth control device that changes the grain culm clamping position of a conveyance means to a shallow handling side or a deep handling side so that the grain tip is located in a dead zone, comprising: a mode selection means for selectively inputting a shallow handling mode and a deep handling mode; When a certain period of time has elapsed while the transport means is located in the dead zone, the transport means moves to the shallow handling side if the shallow handling mode is selected, or to the deep handling side if the deep handling mode is selected. The grain culm is characterized by being provided with a clamping position changing means for changing the grain culm clamping position.

(f) Function In the automatic handling depth control device of the present invention, when the shallow handling mode is selected by the operator, when a certain period of time has elapsed with the ear tip positioned between the upper and lower ear tip sensors, the grain culm of the conveying means is The clamping position is changed to the shallow handling side. Further, when the deep handling mode is selected and a certain period of time has elapsed with the grain tips positioned at the upper and lower ear tip sensors, the grain culm clamping position of the conveying means is changed to the deep handling side.

Therefore, when reaping crops with priority given to reaping efficiency, by selecting the shallow handling mode, the culm clamping position is changed to the shallow handling side, and the length from the tip of the grain culm guided into the threshing device is shortened. be destroyed. This reduces the load on the threshing device and improves reaping efficiency.

Furthermore, when reaping crops with priority given to reaping accuracy, selecting the deep handling mode changes the grain culm clamping position to the deep handling side. As a result, the length of the grain culm guided into the threshing device from the tip is lengthened, the ear of the crop is completely guided into the threshing device, and the grains are completely separated from the grain culm. By selecting the mode in advance, the change of the grain culm clamping position related to priority or reaping accuracy priority can be automatically performed without adding necessary tank work during reaping work.

(g) Embodiment FIG. 1 is a schematic side cross-sectional view showing the structure of a combine harvester equipped with an automatic handling depth control device according to an embodiment of the present invention.

The combine 1 travels within the farmland due to the rotation of the crawler 4. A reaping section 2 is attached to the front end of the combine 1. A cutting blade 5 is provided in the lower part of the inside of the cutting part 2, and the crop guided inside is cut from the base of the plant. A threshing device 3 is mounted in the center of the combine 1. The crops harvested in the reaping section 2 are held by a conveyance chain 7 and conveyed along a conveyance path 8 toward the threshing device 3 (.

The threshing device 3 includes a handling barrel 12 rotatably provided in a handling chamber 11. The handling cylinder 12 has a large number of handling teeth 13 on its circumferential surface, and a swing sorting device 14 is provided below the handling chamber 11, which is supplied with rotational force from a drive device (not shown). This rocking device 4 mechanically separates grains and culm waste separated from grain culms in the handling chamber.

Further below the swing sorting device 14, a trough 15 is provided. This well 15 blows air below the oscillating sorting device 14 to separate grains and culm waste by wind. As a result, only fine grains with high specific gravity are harvested into the hopper 6 by the fine grain auger 16. Furthermore, the grain culm from which the grains have been separated is discharged to the outside from the discharge section 9 together with the culm waste.

Further, a pair of upper and lower ear tip sensors S1 and S2 are attached to the reaping section 2. These ear sensors S1 and S2 come into contact with the ear tip of the grain culm held between the conveyor chain 7 and detect it. A plant base sensor S3 provided below the reaping section 2 contacts the plant base of the crop and detects the presence or absence of a crop to be harvested. Furthermore, a cockpit 1 located in front of the upper surface of the combine 1
0 has mode selection switch SWI and automatic switch S
W2 is provided. This mode selection switch SWI
is the mode selection means of this invention. Further, the automatic switch SW2 is operated when performing automatic extraction control.

FIG. 2 is a block diagram of the control section of the combine harvester.

On/off data of the mode selection switch SWI and automatic switch SW2 is inputted to the CPU 21 from the operation panel control unit 25 via the I10 interface 24.
Detection data from the tip sensors S1 and S2 and the stock sensor S3 are input. The CPU 21 outputs control data to the motor driver 26 in accordance with the program stored in the ROM 22 based on the input data. At this time, RAM2
A portion of 3 is allocated to the working area. Also, the memory area MAI of the RAM 23 is a timer T, which will be described later.
is assigned to.

FIG. 3 is a flowchart showing a part of the processing procedure of the control section of the combine harvester.

When the reaping work conditions such as turning on the threshing switch are established, it is checked whether the automatic switch SW2 is turned on (nl). When the automatic switch SW2 is turned on, automatic extraction control is executed. First, when the stock sensor S3 is turned on (n2), the on/off state of the upper ear tip sensor S1 and the lower ear tip sensor S2 is checked (n
3. n4). The upper tip sensor S1 turns off and the lower tip sensor S
2 is on, that is, the ears of the crop held by the conveyor chain 7 are in the upper and lower positions.

When it is located in the dead zone between S2, it is determined that the grain culm clamping position is appropriate and the timer T is turned on (n3 to n5);
This timer T measures the duration of the state in which the tip of the grain culm is located in the dead zone and the grain culm clamping position is appropriate. Steps n1 to n6 are repeated as long as the tip of the crop remains in the dead zone.

(n13, n14), and if both the upper tip sensor S1 and the lower tip sensor S2 are off, the timer T is reset and the extraction motor M is rotated to the deep handling side (nil, n12). ). n12. The deep handling output and shallow handling output at n14 rotate the extraction motor M by a predetermined amount. Therefore, as long as the upper tip sensor S1 continues to be on, n1 to n3→n13. Repeat n14→n1. Further, as long as the upper and lower tip sensors Sl and n2 continue to be off, n1 to n4→n11. n12→n1 is repeated. As described above, when the tip is located at a higher position than the upper tip sensor S1 as shown by the two-dot chain line in FIG. . On the other hand, if the tip is located below the lower tip sensor S2 as shown by the dashed line in the same figure, the extraction motor M is rotated in the direction of arrow B and the conveyance guide 1 is rotated.
Move 7 to the deep side.

When the timer T performs time amplification in a state where the tip is located in the dead zone, the mode selected by the mode selection switch SWI is checked (n6→n7, n9). If the shallow treatment mode is selected, shallow treatment output is performed for time t1 (n8), and if deep treatment mode is selected, deep treatment output is performed for time t1 (nlo). This time t1 is
This is the time required to slightly move the conveyance guide 17, and movement during this time t1 will not cause the tip located in the dead zone to move out of the dead zone. If neither the shallow treatment mode nor the deep treatment mode is selected, the process returns to nl. The above n7 to nlo correspond to the clamping position changing means of the present invention.

As described above, according to this embodiment, when the tip is located in the dead zone for a certain period of time, the mode selected by operating the mode selection switch SWI is checked.

At this time, if the shallow handling mode is selected, the removal motor M is rotated in the direction of arrow A for a time t1 to slightly shorten the length of the grain culm guided into the threshing device 3 from the tip. This reduces the load on the threshing device 3 and improves reaping efficiency. In addition, when the deep handling mode is selected, the removal motor M is rotated in the direction of arrow B for a time period t1 to slightly lengthen the length of the grain culm guided to the threshing device 3 from the tip. The ears of the grain culm are reliably guided into the threshing device 3, and the accuracy of reaping work is improved.

Therefore, if you want to give priority to either reaping work efficiency or reaping work accuracy, you can select shallow handling mode or deep handling mode using the mode selection switch SWI before starting reaping work. This eliminates the need for movement, for example movement of the tip sensors S1, S2.

Incidentally, the time t1 for rotating the extraction motor M may be made changeable by the clamping position changing means, so that the operator can set an appropriate time. Further, if a volume for detecting the amount of rotation of the drawing motor M is provided, the drawing motor M may be rotated by a predetermined rotation amount.

(h) Effects of the Invention According to this invention, by selectively inputting either the shallow handling mode or the deep handling mode using the mode selection means, when the grain tip is continuously located in the fuwawa zone, the grain culm of the conveying means is The clamping position can be shallow or deep. Therefore, when the operator desires to adjust the conveyance state of the grain culm in order to give priority to reaping efficiency or reaping accuracy during reaping work, there is no need to move the tip sensor as in the past, and the mode selection means allows for shallow handling. If either mode or deep handling mode is selected, the ear tip is automatically moved to the shallow handling side or the deep handling side when the ear tip is in an appropriate position, and load reduction or complete separation of grains is realized. This not only simplifies the reaping work but also improves the safety of the work.

[Brief explanation of the drawing]

Fig. 1 is a schematic side cross-sectional view showing the configuration of a combine harvester equipped with an automatic processing depth control device according to an embodiment of the present invention, Fig. 2 is a block diagram of the control section of the combine, and Fig. 3 is a control of the combine. A flowchart showing part of the processing procedure of the department,
FIG. 4 is a schematic diagram showing the operation of the main parts of the combine during automatic handling depth control. 1-combine harvester, SL-upper ear tip sensor, S2-lower ear tip sensor, 5WI-mode selection switch.

Claims (1)

[Claims] (1) Equipped with a pair of upper and lower ear sensors that detect the position of the grain tip of the grain culm held between the conveyance means, and the position of the grain culm clamping position of the conveyance means is controlled so that the ear tip is located in the dead zone between the upper and lower ear tip sensors. In an automatic handling depth control device that changes to the side or deep handling side, there is a mode selection means for selecting and inputting a shallow handling mode and a deep handling mode, and a mode selection means that selects and inputs a shallow handling mode and a deep handling mode, and a mode selection means that selects and inputs a shallow handling mode and a deep handling mode when a certain period of time has elapsed with the tip located in the dead zone. and a clamping position changing means for changing the grain culm clamping position of the conveying means on the shallow handling side when the mode is selected and on the deep handling side when the deep handling mode is selected. Depth control device.