JPH04148616A - Device for controlling threshing depth of combine - Google Patents

Abstract

PURPOSE:To reduce erroneous motion of reaping-up operation by operating a threshing depth control means to the deep threshing side when a reaping part is continuously operated to the raising side for a pre time of till a pre amount in reaping-up state. CONSTITUTION:When a selection means 25 for selecting reaping state and non-reaping state is set to reaping state and a reaping part is operated to raising side, the reaping part is continuously raised for a prescribed time or till a prescribed amount. In this time, a control device H operates a threshing depth control means C to deep threshing depth side to prevent the occurrence of shallow threshing.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a reaping section that can be freely operated up and down to harvest grain culms, a conveyance device that conveys the cut grain culms, and a threshing system for the conveyed grain culms. a threshing device, a tip position detection means for detecting the tip position of the grain culm transported by the conveying device, a handling depth adjusting means for adjusting the handling depth in the threshing device, and a tip position detection means. The present invention relates to a handling depth control device for a combine harvester, comprising a control means for operating the handling depth adjusting means to maintain the handling depth at a target handling depth based on information of the means.

[Conventional technology]

When exiting the field after completing one step of the reaping process, it is best to stop the reaping process completely or raise it slightly before the end, in order to prevent the front end of the reaping unit from colliding with the ridges. This is a common practice. In such a case, if the handling depth adjustment means is operated only based on the information from the ear tip position detection means, it will not be able to follow changes in grain culm length (the length from the grain culm support point by the conveyance device to the ear tip). They tend to be treated lightly.

Therefore, it has been considered to avoid the occurrence of shallow handling by, for example, operating the handling depth adjustment means toward the deep handling side when the reaping section is continuously operated upward for a set time or by a set amount. .

[Problem to be solved by the invention]

In the above-mentioned conventional technology, when there are irregularities in the field, there is a risk that the cutting operation will be performed when the reaping section is raised or lowered to adjust the height of the reaping section to correspond to the irregularities, and in this case, the threshing device may be operated too deeply. This may cause problems such as overloading.

SUMMARY OF THE INVENTION An object of the present invention is to overcome the above-mentioned conventional drawbacks and to provide a highly reliable combine harvester handling depth control device that is less likely to malfunction in cutting operations.

[Means to solve the problem]

In order to achieve this object, the characteristic configuration of the combine handling depth control device according to the present invention is that a selection means is provided for selecting a mowing state and a non-mowing state, and the control means is configured such that when the selection means is in the mowing state, Further, when the reaping section is continuously operated to the upward side for a set time or a set amount, the handling depth adjusting means is configured to be operated to the deep handling side.

[For production]

If the cutting operation is to be performed when one step of the cutting operation is completed, the selection means may be set to the cutting state, and then the cutting section may be operated to the upward side.

On the other hand, if there are irregularities in the field during the reaping operation, the irregularities can be dealt with by raising and lowering the reaping section. At this time, since the mowing operation is not performed, the handling depth adjustment means does not operate to the deep handling side.

〔Effect of the invention〕

Therefore, it is possible to reduce the possibility that the cutting operation will malfunction, thereby increasing the reliability of the combine harvester handling depth control device.

〔Example〕

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

As shown in Figure 5, a pair of left and right crawler steering devices (1
), a threshing device (2), and a control section (3).
A combine harvester is constructed by attaching a reaping part (B) to the front part of A) so as to be able to swing up and down.

The reaping section (B) includes a pulling device (4) for raising the planted grain culms, a cutting blade device (5) for cutting the stock base of the raised grain culms, and a rear part for gathering the harvested grain culms. It is equipped with an auxiliary conveyance device (6) for conveying the harvested grain culms to the threshing device (2), and a vertical conveyance device (8) for passing the conveyed harvested grain culms to the threshing feed chain (7) of the threshing device (2) while gradually rolling them sideways. There is.

In normal reaping work, the reaping part (B) is controlled to move up and down so as to maintain a constant height above the ground.
It is also possible to raise/lower preferentially by manually operating the reaping raising/lowering lever (9) provided in the control section (3).

As shown in FIG. 1, the vertical conveyance device (8) includes a clamping conveyance device (8A) that clamps and conveys the stock side of the harvested grain culm, and an ear locking device that locks and conveys the ear side of the harvested grain culm. Conveyance device (8B
) and an ear guide plate (8C), which conveys the harvested grain culm from the auxiliary conveyance device (6) in a vertical position toward the rear of the machine, and at the end of the conveyance, changes to a horizontal position to thresh. The receiver functions to pass the feed chain (7).

Further, the vertical conveyance device (8) is pivotally mounted at the terminal end so as to be vertically swingable around the horizontal axis (P). Then, when it is swung up and down, the support position of the harvested grain culm supplied from the auxiliary conveyance device (6) is changed to the direction of the culm, and furthermore, the support position of the harvested grain culm supplied from the auxiliary conveyance device (6) is changed to the direction of the culm, and furthermore, the support position from this vertical conveyance device (8) to the threshing feed chain (7) is changed. The position of the harvested grain culm to be passed is changed in the direction of the culm, and the handling depth in the threshing device (2) is changed and adjusted.

To explain the swinging operation structure of the vertical conveyance device (8), as shown in FIG. Adjustment lever (
10) with a rack (11) attached, and the rack (11)
A pinion (12) that engages with the motor is attached to the electric motor (M). In addition, an inverted U-shaped member (13) that also serves as the frame of the vertical conveyance device (8) and an arm (14) are interlocked and connected via a push-pull rod (15), and the electric motor (M) The vertical transport device (8) is configured to swing up and down by operating the vertical transport device (8) in the forward and reverse directions. Note that the handling depth adjusting means (C) is composed of the vertical conveyance device (8), the arm (14), the rack (11), the binion (11), the electric motor (M), and the like.

As shown in FIG. 2, a pair of upper and lower tip sensors (Sυ,
(It is installed so that the S-grip is in contact with the grain culm conveyed by the vertical conveyance device (8).The ear tip sensor (
Sl) and (Sl) each include a sensor lever (16) that swings backward toward the lower side of conveyance due to contact with the grain culm, and a detection section that uses a switch to detect the backward swing of the sensor lever (16). 17), which consists of a tip sensor (Sl) located at the top side of the harvested grain culm and a tip sensor (Sl) located at the bottom.
A state in which the lower tip sensor (Sl) detects the presence of grain culms is considered to be within the appropriate handling depth range.

Each tip sensor (Sυ, (S is a control device (H)
), and this control device (H) controls the drive circuit (16) of the electric motor (M) after the set delay time has elapsed based on the information from these tip sensors (Sl), (Sl).
A drive command is output to the vertical transport device (8) to vertically swing it. In this case, if the vertical conveyance device (8) swings downward, it will be adjusted to the deep handling side, and if it swings upward, it will be adjusted to the shallow handling side.

Further, as shown in FIG. 1, a push-button selection switch (25) as a selection means for selecting a mowing state and a non-mowing state is provided on the side of the mowing lift lever (9) provided in the control section (3). ) is provided. In other words, when the reaping section (B) is continuously operated in the upward direction for a set time within a predetermined time after this selection switch (25) is turned ON, it is determined that the mowing state is in progress, and the cutting depth adjustment means (C)
It activates the deep handling side.

In Fig. 1, (19) is a threshing switch that detects the on/off operation of the threshing clutch lever (20), and (21) is a threshing switch that detects whether or not grain culm is being supplied to the conveyance start end of the vertical conveyance device (8). (22) is a switch for starting command for handling depth control; (23) is a rise detection switch that detects operation of the reaping lift lever (9) to the rise side;
(24) is an alarm device that outputs an alarm when floating straw occurs.

Next, the control operation of the control device (H) will be explained based on the flowcharts of FIGS. 3 and 4.

However, this control operation is repeated once every several m5ec.

First, the handling depth adjustment is performed by pressing the start command switch (22).
) and the threshing switch (19), and if both are in the ON state, it is detected whether or not grain culms are present from the output of the stock sensor (21).

If the stock sensor (21) is in the ON state, it is determined that the cutting operation is in progress, and the cutting depth control described below is performed.

However, if the reaping part (B) is continuously operated to the upward direction for more than the set time within a predetermined time after the selection switch (25) is turned ON, the handling depth adjustment means (C) will be operated to the depth for the set time. side, then stop the handling depth adjustment.

On the other hand, if the stock sensor (21) is in the OFF state, check whether the state is after the operation to the faulty side has been performed, and if so, check whether the set time has elapsed or not. If so, adjust the handling depth to the shallow side for the set time and then stop adjusting the handling depth. However, if the operation to the shallow side is not performed or the set time has not elapsed, the process returns to 1.

Note that the set time for adjusting to the deep handling side is equal to the set time for adjusting to the shallow handling side.

The handling depth control will be explained based on the flowchart of FIG.

If the lower tip sensor (Sl) is in the ON state and the upper tip sensor (Sl) is in the ON state, the adjustment is made to the shallow handling side by the set amount after the delay time elapses, but the upper tip sensor ( If Sl) is in the OFF state, the handling depth adjustment is stopped after the delay time has elapsed.

If the lower tip sensor (S2) is in the OFF state and the upper tip sensor (Sυ) is in the OFF state, either adjust to the deep handling side after the delay time has elapsed, or If it is in the ON state, it is determined that there is a detection error due to floating straw, and the control operation is immediately stopped, and an alarm device (24) is activated to notify that floating straw has occurred.

That is, the control means (10
0) is configured.

[Another example]

In the above embodiment, when the reaping part (B) is continuously operated in the upward direction for a set period of time in the cutting state, the cutting depth adjustment means is operated to the deep cutting side, but the setting amount is not operated. It may be activated at times.

In the above embodiment, the handling depth is adjusted by vertically swinging the vertical conveying device (8), or the feed chain (7) may be moved parallel to the threshing device (2). can be changed in various ways.

It should be noted that the present invention is not limited to the structure of the attached drawings by adding numerals in the claims for convenient comparison with the drawings.

[Brief explanation of drawings]

The drawings show an embodiment of the handling depth control device for a combine harvester according to the present invention, FIG. 1 is a side view of the main part and the control configuration, FIG. 2 is a front view of the tip position detection means, FIG. FIG. 4 is a flowchart of the control operation, and FIG. 5 is a side view of the front part of the combine. (2)... Threshing device, (8)... Conveying device, (25)... Selection means, (100)...
... Control means, (B) ... Reaping section, (C)
...... handling depth adjustment means, (St), (S2).
.... Tip position detection means.

Claims (1)

[Scope of Claims] A reaping unit (B) that can be freely operated up and down to harvest grain culms, a conveyance device (8) that conveys the harvested grain culms, and a threshing device (2) that threshes the conveyed grain culms. In addition to providing
Spear tip position detection means (S_1), (S_2) for detecting the position of the grain tip of the grain culm transported by the conveying device (8), and handling depth adjusting means for adjusting the handling depth in the threshing device (2). (
C) and the tip position detection means (S_1), (S_2)
A combined handling depth control device for a combine, comprising: a control means (100) for operating the handling depth adjusting means (C) to maintain a target handling depth based on information on the target handling depth; A selection means for selecting the cutting state (
25) is provided, and the control means (100) controls the selection means (25) to be in the cutting state and the reaping section (B) to be continuously operated to the upward side for a set time or a set amount. A handling depth control device for a combine harvester, which is configured to sometimes operate the handling depth adjusting means (C) to the deep handling side.