JPH04148617A - Device for controlling threshing depth of combine - Google Patents

Abstract

PURPOSE:To prevent occurrence of shallow threshing when reaping operation is stopped while raising a reaping part by operating a threshing depth control means to deep threshing side according to reaping-up operation directed by a direction means, and then stopping subsequent operation. CONSTITUTION:A direction switch 23 is turned on according to raise of reaping part and reaping-up operation is started and the operation of a threshing depth control means C to deep threshing side is carried out for a prescribed time or till a prescribed amount. After reaping-up operation, the operation of a control means 100 is stopped and length of grain culm after reaping-up operation is maintained to a definite length.

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]

Conventionally, in the handling depth control device of a combine harvester like the one mentioned above,
The control means operates the handling depth adjustment means based only on the information from the tip position detection means.

[Problem to be solved by the invention]

When leaving the field after completing one step of the reaping process, it is best to raise the reaping unit slightly before the reaping process is completely interrupted or finished, in order to prevent the front end of the reaping unit from colliding with the ridge. This is a common practice. As the reaping section continues to rise, the reaping position moves toward the tip of the grain culm, so
Grain culm length (the length from the point where the grain culm is supported by the conveyance device to the tip of the grain) gradually becomes shorter.

The tip position of the grain culm is detected after it reaches the tip position detection means, so it is not possible to tell that the grain culm has become short until the time for transportation has elapsed after the reaping section has been raised. Although the grain culm length of the grain culms being conveyed is rapidly decreasing, the grain culm length adjustment means operates only after it is determined that the grain culm length has shortened. There is a tendency to be treated too poorly.And, since treating things poorly can lead to problems such as untreated items, it is desirable to avoid this situation as much as possible.

The present invention has been made in view of this situation, and its purpose is to allow the harvested grain culms to be threshed at an appropriate handling depth even if the reaping operation is interrupted or terminated while the reaping section is raised. The purpose is to do so.

[Means to solve the problem]

In order to achieve this object, the characteristic configuration of the combine harvester handling depth control device according to the present invention is that an instruction means for instructing the cutting operation is provided, and the control means is configured to control the cutting depth when the instruction means instructs the cutting operation. The handling depth adjusting means is configured to operate toward the deep handling side and stop the subsequent operation.

[For production]

When the instruction means is turned on as the reaping section rises, the reaping operation is started.

That is, the handling depth adjusting means is operated toward the deep handling side for a predetermined time or a predetermined claw. Therefore, when the reaping position moves toward the tip of the grain culm, it can be operated toward the deep handling side. This makes it possible to maintain a constant grain culm length during the cutting operation. Further, since the operation of the control means is stopped after the cutting operation, the grain culm length after the cutting operation can be maintained constant.

〔Effect of the invention〕

Since the grain culm length can be maintained constant during and after the cutting operation, it has been possible to obtain a handling depth control device for a combine harvester that can avoid the occurrence of shallow handling during the cutting operation and can perform appropriate threshing.

〔Example〕

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

As shown in Figure 4, 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)
The pinion (12) that engages with the motor is attached to the electric motor (M). In addition, the inverted U-shaped member (13), which also serves as the frame of the vertical conveyance device (8), is interlocked with the arm (14) and push/pull rod (15), and the electric motor (M) The vertical conveyance device (8) is configured to swing up and down by operating in 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 pinion (11), the electric motor (M), etc.

As shown in FIG. 2, the inverted U-shaped member (13) is provided with a pair of upper and lower tip sensors (S,) as tip position detection means.
, (S2) is attached so as to be in contact with the grain culm transported by the vertical transport device (8). Each of the ear sensors (Sl, C8I') has a sensor lever (16
) and a detection unit (17) using a switch to detect the backward swing of the sensor lever (16), and the position on the ear side of the harvested grain culm is the upper ear tip sensor (S,) and the lower ear tip sensor (S,). The lower tip sensor (S,) is located between the lower tip sensor (S,).
, ) detecting the presence of grain culms is considered to be within the appropriate treatment depth range.

Each of the tip sensors (Sl) and (S2) is connected to a control device ()l), and this control device (H) determines the set delay time based on the information of these tip sensors (Sl) and (S2). After the elapse of , the drive circuit of the electric motor (M) (
A drive command is output to 16) to vertically swing the vertical conveyance device (8). 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, the control device (H) is connected to an instruction switch (23) as an instruction means for instructing mowing operation, and a reverse switch (25) which is turned ON when the combine is traveling backward. In other words, turn on the instruction switch (23)
In accordance with the operation, the handling depth control means (C) is operated to the deep handling side for a set time, and then the operation is stopped. Then, when the reverse switch (25) is turned on, the handling depth control means (C) is operated to the deep handling side for a set time.

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

In Fig. 1, (19) is the threshing clutch lever (
a threshing switch that detects the on/off operation of (20);
) is a stock sensor for detecting whether or not grain culm is being supplied to the transport start end of the vertical transport device (8), and (22) is a switch for commanding start of handling depth control.

Next, the control device (H
) control operation will be explained.

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 from the output of the stock sensor (21) whether or not grain culms are present. Stock sensor (21) is ON
If so, it is determined that the reaping operation is in progress, and it is detected whether the instruction switch (23) has been turned on.

If the instruction switch (23) is OFF, the handling depth is controlled so that the tip of the harvested grain culm is located between the upper tip sensor (Sl) and the lower tip sensor (S2).

On the other hand, if the instruction switch (23) is ON, the reaping section (B) is raised for a set period of time, and the handling depth adjusting means (C) is operated to the deep handling side as described above. Thereafter, the handling depth adjustment is stopped until the reverse switch (25) is turned on.

When the reverse switch (25) is turned on, the reaping section (B) is lowered for a set period of time and the handling depth adjusting means (C) is operated to the deep handling side. Then, the handling depth adjustment is resumed.

[Another example]

In the above embodiment, when the instruction switch (23) instructs the mowing operation, the cutting depth adjusting means (C) is operated to the deep cutting side for a set time, but it is also possible to operate it by a set amount. good.

Further, in the above embodiment, a case has been described in which the reaping section is also automatically raised and lowered, but the reaping section may be raised and lowered manually.

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 part and the control configuration, FIG. 2 is a front view of the tip position detection means, and FIG. A flowchart of the control operation, FIG. 4 is a side view of the front part of the combine. (2)... Threshing device, (8)... Conveying device, (23)... Instruction means, (100)...
... Control means, (B) ... Reaping section, (C)
...... handling depth adjustment means, (S+), (S2).
.... Tip position detection means.

Claims (1)

[Claims] It is equipped with a reaping section (B) that can be freely operated up and down to reap grain culms, a conveyance device (8) that conveys the harvested grain culms, and a threshing device (2) that threshes the conveyed grain culms,
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 control device (100) for operating the cutting depth adjustment means (C) to maintain the cutting depth at a target cutting depth based on the information of the combine harvester, the control device instructing a cutting operation. The control means (100) operates the cutting depth adjusting means (C) to the deep cutting side as the indicating means (23) instructs the cutting operation. and a combine depth control device configured to stop further operation.