JPH02299508A - Controller for threshing depth of combine - Google Patents

Abstract

PURPOSE:To enable reduction of residual threshing or ear overflow in a thresher to less than that in conventional combines by enabling rapid practice of regulation of threshing depth even if a reaping and treating part is rapidly lifted or lowered. CONSTITUTION:A reaping and treating part for reaping planted grain culms and conveying the reaped grain culms to a thresher is liftably and loweringly provided relatively to a main machine provided with the thresher. A threshing depth regulating means (C) is operated with a controlling means (H) so as to keep the threshing depth at the set threshing depth based on information from threshing depth sensing means (S1) and (S2) when the sensing means (S1) and (S2) sense that the threshing depth is not continuously kept at the set depth for the set time or more for delaying controlling operation. A lifting or lowering state sensing means (PM) for sensing a rapid lifting or lowering state in which the extent of lifting or lowering within the set time in the reaping and treating part is above the set value is provided. Furthermore, the controller (H) reduces the set time for delaying the controlling operation following the sensing of the above-mentioned rapid lifting or lowering state based on the sensed information from the means (PM). As a result, proper response can be made even to quick lifting or lowering of the reaping and treating part to reduce residual threshing.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a method in which a reaping processing section that reaps planted grain culms and conveys the harvested grain to a threshing device is provided so as to be movable up and down with respect to this machine equipped with the threshing device. and a handling depth detection means for detecting a handling depth, a handling depth adjusting means, and a handling depth detecting means detecting that the handling depth is not continuously at the set handling depth for a set time for delaying control operation. The present invention relates to a handling depth control device for a combine harvester, which is provided with a control means for operating the handling depth adjusting means based on information from the handling depth detection means so as to adjust the handling depth to a set handling depth according to the processing depth.

[Conventional technology]

The harvested grain culms that are transported do not always have the same culm length, and grains that are longer or shorter than the standard are suddenly mixed in. Therefore, if the handling depth adjustment means is operated based on such sudden detection information of the harvested grain culm as valid information, the control system will become unstable.

Therefore, in the conventional combine harvester handling depth control device,
Even if the handling depth detection means detects that the handling depth is not at the set handling depth,
The handling depth adjustment means is not activated unless it is detected continuously for more than a set time for the control activation delay;
It stabilizes the control system.

Incidentally, since it takes a certain amount of time for the cut grain culms to be transported from the detection position of the handling depth detection means to the handling depth adjustment position of the handling depth adjustment means, the set time for the control activation delay is Even if this is set, it will not be a problem in normal reaping work.

[Problem to be solved by the invention]

By the way, for example, at the edge of a ridge just before the end of one stroke of the reaping operation, in order to avoid the tip of the reaping section colliding with the ridge, the reaping operation is not performed even though the grain culm remains in front. It may be necessary to mow while quickly raising the area manually.

In this case, the culm length of the harvested grain culm being transported becomes rapidly shortened. Therefore, many of the grain culms that are cut while the reaping section is manually raised are not able to adjust to the appropriate handling depth, and the culm length that was set before the reaping section started to rise, or even slightly below the culm length. When the grains were too long, they were conveyed to the threshing equipment at an inappropriately adjusted handling depth, causing unhandled grains and overflowing of ears in the threshing equipment.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a handling depth control device for a combine harvester, which can appropriately cope with rapid lifting and lowering of a reaping processing section, and can reduce unhandled ears and overflowing of ears.

[Means to solve the problem]

In order to achieve the above object, the handling depth control device for a combine harvester according to the present invention is provided with a lifting/lowering state detection means for detecting a rapid lifting/lowering state in which the lifting amount of the reaping processing section within a set time is equal to or greater than a set value. and the control device is configured to reduce the set time for the control activation delay as the rapid lifting/lowering state is detected based on the detection information of the lifting/lowering speed detection means. It has a characteristic structure.

[For production]

When the raising/lowering state detection means detects a rapid raising/lowering state in which the amount of raising/lowering of the reaping processing section within a set time is equal to or greater than a set value, the control device reduces the set time for delaying the control operation. Therefore, even if the handling depth of grain culms conveyed to the threshing device changes rapidly as the reaping processing unit moves up and down, the handling depth will be quickly adjusted to the set handling depth within a short set time.

〔Effect of the invention〕

Even when the reaping processing unit moves up and down rapidly, the handling depth can be adjusted quickly, making it possible to reduce the occurrence of unhandled grains and overflowing ears in the threshing equipment compared to before. .

〔Example〕

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

As shown in Fig. 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 the reaping processing section (B) to the front part of the harvester A) so as to be able to swing up and down.

The reaping processing unit (B) includes a raising device (4) that causes a planted grain culm, a cutting blade device (5) that cuts the base of the raised grain culm, and a gathering device that collects the harvested grain culm. It is equipped with an auxiliary conveyance device (6) for conveying the harvested grain to the rear, a vertical conveyance device (8) for passing the conveyed harvested grain culm to the threshing feed chain (7) of the threshing device (2) while gradually turning it sideways. ing.

During normal reaping work, the reaping processing unit (B) is controlled to move up and down so as to maintain a constant height above the ground. You can also preferentially go up and down by operating it.

The swinging fulcrum part of this reaping processing part (B) with respect to the machine body is
A potentiometer (PM) (an example of lifting/lowering state detection means) is attached to detect the swing angle of the reaping processing section (B), and this potentiometer (PM) is controlled by a microcomputer-based control device ( H). The control device (H) calculates the amount of elevation (elevating and descending speed in this embodiment) of the reaping processing unit (B) within a set time, and determines whether the amount of elevation is greater than the set value or not. It is designed to be detected. Incidentally, this rapid raising/lowering state generally refers to the operation of the reaping processing section ('A) by operating the raising/lowering lever (22).
) is likely to appear when the vehicle is raised or lowered preferentially.

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, by vertically swinging, the support position of the harvested grain culm supplied from the auxiliary conveyance device (6) is changed toward the culm body, 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 of the harvested grain culm supplied from the auxiliary conveyance device (6) is changed to The position of the harvested grain culm being 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. A rack (lO) is attached to the height adjustment lever (23), and the rack (lO) is
The pinion (11) that engages with the electric motor (
M) is attached.

Further, an inverted U-shaped member (12) that also serves as the frame of the vertical conveyance device (8) and the arm (9) are interlocked and connected via a push-pull rod (13), and the electric motor (M) is configured so that the vertical conveyance device (8) is vertically swung by operating it in forward and reverse directions. still,
The handling depth adjusting means (C) is composed of the vertical conveyance device (8), the arm (9), the rack (10), the pinion (11), the electric motor (M), and the like.

As shown in FIGS. 1 and 4, the inverted U-shaped member (1
2), a pair of upper and lower grain culm presence/absence sensors (S
t), (S2) are attached so as to be in contact with the grain culm being transported by the vertical transport device (8). Each of the grain culm presence/absence sensors (S1) and (S2) detects a sensor lever (14) that swings backward toward the lower side of conveyance due to contact with the grain culm, and detects the backward swing of the sensor lever (14). It consists of a detection unit (15) using a switch, and the position of the tip side of the harvested grain culm is located between the tip side sensor (Sl) and the stock side sensor (S2), and the stock side sensor (S2)
The state in which the presence of grain culms is detected is considered to be within the appropriate handling depth range.

The grain culm presence/absence sensor (St), (S2) is connected to the control device (H). The control device (H) outputs a drive command to the drive circuit (16) of the electric motor (M) after a set delay time (T) has elapsed based on the information from these grain culm presence/absence sensors (S1) and (S2), The handling depth is changed and adjusted by vertically swinging the vertical conveyance device (8).

In Fig. 1, (17) is the threshing clutch lever (
a threshing switch that detects the on/off operation of (18);
) is a stock sensor for detecting whether or not grain culm is supplied to the transport start end of the vertical transport device (8), (20) is a switch for starting command for controlling handling depth, and (21 ) is an alarm device that outputs an alarm when floating straw occurs. The handling depth control is performed by turning on the start command switch (20), turning on the threshing clutch lever (18), and operating the threshing clutch lever (18).
Further, the control operation is performed on the condition that the stock sensor (19) is in a state of detecting the presence of grain culms.

Next, the control operation of the control device (H) will be explained based on the flowchart shown in FIG. However, this control operation is several meters long.
It will be repeated once every sec.

First, it is determined from the change in the output value of the potentiometer (PM) whether or not it is a rapid rise/fall state, and if it is determined that it is a rapid rise/fall state, a set delay time (T) corresponding to the rise/fall speed is determined.
Change the settings so that When changing this setting,
The relationship shown in the graph in Figure 3 is used, and as the amount of elevation (ΔL) per set time exceeds the set value (LO), the set delay time (T) is decreased from the initial value (TO) to improve the response. Hopefully it will be soon.

Then, both presence/absence sensors (St) and (S2) are checked. If both presence/absence sensors (S1) and (S2) are in the ON state and this continues until the set delay time (T) has elapsed, it is determined that the harvested grain culm is on the deeper handling side than the appropriate depth range. Based on this judgment, the electric motor (M) is driven to swing the transport start end of the vertical transport device (8) toward the shallow handling side, that is, upward.

When the presence/absence sensor (S2) on the stock side is in the ON state and the presence/absence sensor (Sl) on the tip side is in the OFF state, it is determined that the handling depth is within the appropriate range, and the handling depth is controlled. control operation is stopped to maintain the current handling depth. At this time, if the set delay time (T) is not at the initial value (To), it is reset to the initial value (To).

If both presence/absence sensors (S1) and (S2) are in the OFF state and this continues until the set delay time (T) has elapsed, it is determined that the grain culm is on the shallower handling side than the appropriate handling depth range. Based on this judgment, the electric motor is driven to swing the vertical conveyance device (8) toward the deep handling side, that is, toward the downward side.

If the presence/absence sensor (S2) on the stock side is in the OFF state and the presence/absence sensor (Sl) on the tip side is in the ON state, it is determined that there is a detection error due to floating straw, and the control operation is stopped. , an alarm is output to notify that floating straw is occurring. This warning continues for a certain period of time after it is determined that there is a detection error.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying 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 parts and the control configuration, FIG. 2 is a flowchart of work control, and FIG. 3 is a setting time. Graph showing the relationship between the lifting amount per hit and the set delay time, 4th
The figure is a front view of the handling depth detection means (S1) and (S2), and the fifth
The figure is a side view of the front part of the combine. (2)...Threshing device, (A)...This machine, (B)...Reaping processing section, (C)...
Handling depth adjustment means, (H)... Control device, (PM
)... Lifting state detection means, (S1), (S2)
・・・・・・Method for detecting handling depth.

Claims (1)

[Claims] The reaping processing unit (B) that reaps the planted grain culm and conveys it to the threshing device (2) is the main machine (A) equipped with the threshing device (2).
The handling depth detection means (S_1) and (S_2) which are provided to be able to rise and fall freely against the handling depth and detect the handling depth, and the handling depth adjustment means (
C), and when the handling depth detecting means (S_1) and (S_2) detect that the handling depth is not at the set handling depth continuously for a set time for delaying control operation, the set handling depth is set. , a control means for operating the handling depth adjusting means (C) based on the information of the handling depth detection means (S_1) and (S_2);
H) A handling depth control device for a combine harvester, wherein the lifting state detection means (
PM), and the control device (H) is configured to set the control operation delay setting time (T_0 ). A combine handling depth control device configured to reduce: