JPH0445713A - Threshing depth controlling apparatus of combine - Google Patents

Abstract

PURPOSE:To prevent insufficient threshing by using a controlling means for controlling a threshing-depth adjusting means and shifting the threshing-depth adjusting means to a deep-threshing side when a reaping part is operated to the lifting side. CONSTITUTION:A threshing-depth adjusting means C is controlled with a controlling means H to keep the threshing depth to a target level. When a reaping part is operated to the lifting side, the threshing-depth adjusting means C is shifted to a deep-threshing side by the controlling means H. Insufficient threshing does not take place even if the reaping operation is interrupted or finished while operating the reaping part to the lifting side.

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. In addition to being equipped with a threshing device, the above-mentioned conveyance device! A target handling depth is determined based on the information of the ear tip position detecting means for detecting the position of the ear tip of the grain culm being conveyed by the threshing device, the handling depth adjusting means for adjusting the handling depth in the threshing device, and the ear tip position detecting means. and control means for operating the working depth adjusting means to maintain the working depth of a combine harvester.

[Conventional technology]

In such a combine harvester handling depth control device, the control means includes:
The handling depth adjusting means is configured to be operated only by control based on information from the tip position detecting means.

[Problem to be solved by the invention]

When leaving the field after completing one step of the reaping process, raise the reaping unit slightly before the reaping process is completely interrupted or completed 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
The grain culm length (the length from the grain culm support point to the tip of the grain by the conveyance device) becomes shorter. Since the rate of rise of the reaping section is relatively fast, the amount of change in grain culm length per unit time is greater than the amount of change in grain culm length that can occur during normal reaping work.

Since the grain tip position is detected after the grain culm reaches the ear tip position detection means, it is not known that the grain culm length has become short until the time for transportation has elapsed after the reaping section has been raised. However, the handling depth adjusting means operates only after it is determined that the grain culm length of the grain culms being conveyed has become short, even though the grain culm length is rapidly decreasing. Therefore, there is a tendency to be unable to follow these changes and end up being treated shallowly. In addition, shallow handling leads to problems such as untreated items, and it is desirable to avoid such shallow handling as much as possible.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to ensure that the harvested grain culms are threshed at an appropriate handling depth even if the reaping operation is interrupted or completed without raising the reaping unit. The goal is to make it possible.

[Means to solve the problem]

In the combine harvester handling depth control device according to the present invention, the control means is configured to operate the handling depth adjustment means to the deep handling side when the reaping section is operated to the rising side. is the first characteristic configuration.

A second characteristic configuration is that the control means is configured to operate the handling depth adjusting means to the deep handling side when the reaping section is continuously operated to the upward side for a set time. There is.

A third characteristic configuration is that the control means is configured to operate the handling depth y4m means to the deep handling side when the reaping section is continuously operated to the upward side by a set amount. .

A fourth characteristic configuration is that the control means is configured to operate the handling depth adjusting means toward the deep handling side by a set amount to the deep handling side.

The control means is configured to determine the time for operating the handling depth adjusting means to the deep handling side depending on the time for which the reaping section is continuously operated to the upward side. It has 5 characteristic configurations.

The control means is configured to determine the amount by which the handling depth adjusting means is operated toward the deep handling side in accordance with the amount by which the reaping section is continuously operated toward the upward side. 6th
It has a characteristic configuration of

[For production]

In the first characteristic configuration, when the reaping section is operated to the upward side in order to interrupt or end the reaping operation, the position of the tip of the grain culm conveyed by the conveying device gradually decreases and becomes shallow handling.
The control means operates the handling depth adjusting means toward deep handling at an early stage to suppress the occurrence of shallow handling.

In the second characteristic configuration, in the first characteristic configuration, if the continuous operation time of the reaping section to the upward side is equal to or longer than the set time, the il1 means operates the handling depth adjustment means to the deep handling side. . In other words, if the operating time of the reaping section to the rising side is short, the handling depth adjusting means will not operate to the deep handling side. If the continuous operation amount to the side is greater than or equal to the set amount,
The control means operates the handling depth adjusting means to the deep handling side.

If the amount of operation to the upward side of the reaping section is small, the handling depth adjusting means will not operate to the deep handling side.

In the fourth characteristic configuration, in the first to third characteristic configurations,
The control means adjusts the operation of the handling depth adjusting means toward the deep handling side by a set amount.

In a fifth characteristic configuration, in the second characteristic configuration, the control means controls a time period for operating the handling depth adjusting means to the deep handling side in accordance with the time period during which the reaping section is continuously operated to the rising side. decide. In other words, the longer the operating time of the reaping part to the upward side, the shallower the handling becomes, so the handling depth is m! The operating time of the ff means to the deep handling side is increased to thresh the grain in a deeper handling state.

In a sixth characteristic configuration, in the third characteristic configuration, the control means controls the amount by which the handling depth adjusting means is operated toward the deep handling side in accordance with the amount by which the reaping section is continuously operated toward the upward side. decide. In other words, the larger the amount of operation of the reaping section in the upward direction, the shallower the handling condition, so the amount of operation of the handling depth adjusting means toward the deeper side is increased to perform threshing in an even deeper handling condition.

〔Effect of the invention〕

According to the first characteristic configuration, even if the reaping operation is interrupted or terminated without operating the reaping unit to the upward direction, the grain culm to be reaped last can be threshed without being treated shallowly.

According to the second characteristic configuration, even if the reaping section is operated to the upward side during the reaping operation, the handling depth adjusting means can be prevented from operating to the deep handling side if the operating time is less than the set time. Even if there are irregularities in the field, if the irregularities can be cleared by short-time operation of the reaping section, threshing can be maintained at an appropriate handling depth.

According to the third characteristic configuration, even if the reaping section is operated to the upward side during the reaping operation, the handling depth adjusting means can be prevented from operating to the deep handling side if the amount is less than the set amount. Even if there are irregularities in field II, if the irregularities can be passed by a small raising operation of the reaping section, threshing with an appropriate handling depth can be maintained.

According to the fourth characteristic configuration, since the amount of operation of the handling depth adjusting means toward the deep handling side is set in advance, the burden when the control means operates the handling depth adjusting means is reduced. The set amount is 1, and the setting may be changed to an appropriate amount depending on the situation.

According to the fifth characteristic configuration, it is possible to thresh with a more appropriate handling depth than in the case of the second characteristic configuration.

According to the sixth characteristic configuration, it is possible to thresh with a more appropriate handling depth than in the case of the third characteristic configuration.

(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 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. an auxiliary conveyance device (6) that conveys the harvested grain culms, a vertical conveyance device (8) that gradually overturns the conveyed harvested grain culms and transfers them to the threshing feed chain (7) of the threshing device (2), etc. We are prepared.

In normal reaping work, the reaping part (B) is controlled to move up and down so as to maintain a constant height relative to 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 (8^) that clamps and conveys the stock side of the harvested grain culm, and a tip section that holds and conveys the tip side of the harvested grain culm. Stop 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). When the grain is swung up and down, the supporting position of the harvested grain culm supplied from the auxiliary conveyance device (6) is changed toward 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 of the harvested grain culm supplied from the auxiliary conveyance device (6) is changed to the direction of the culm. 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 ring (15), and an electric motor (M) The vertical transport device W (8) is configured to swing up and down by operating the vertical transport device W (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, the inverted U-shaped member (13) is equipped with a pair of upper and lower ear tip sensors (Sl) for detecting the position of the ear tips, and a pair of upper and lower ear tip sensors (Sl) are attached to the inverted U-shaped member (13). It is installed so that it is in contact with the culm.Tip sensor (St)
, (sz) 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 (17) using a switch that detects the backward swing of the sensor lever (16). The position of the tip of the harvested grain culm is located between the upper tip sensor (Sl) and the lower tip sensor (S2), and the lower tip sensor (S8) detects the presence of the grain culm. We consider the situation in which it is within the appropriate treatment depth range.

Each tip sensor (Sl), (SZ) is connected to a control device (H), and this control device (H) calculates the set delay time based on the information of these tip sensors (Sυ, (S,). After the elapsed time, the drive circuit (16) of the electric motor (M)
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.

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 conveyance start end of the vertical conveyance device (8), (22) is a switch for starting the handling depth control, and (23) is a A rise detection switch (24) that detects the operation of the reaping lift lever (9) to the rise side is an alarm device that outputs an alarm when floating straw occurs.

Next, the control device (I
The control operation of () will be explained. However, this control operation is several meters long.
It will be repeated once every sec.

First, handling depth control is performed using the start command switch (22
) and the threshing switch (19), and if both are in the ON state, detect whether grain culms are present or not from the output of the stock sensor (21) (steps 1 to 3). If the original sensor (21) is in the ON state, it is determined that the reaping operation is in progress, and the raising operation switch (23) is checked to see if it is in the ON state, that is, the reaping part (B) is operated to the ascending side. If it continues for a set time, adjust the handling depth by the set amount toward the deeper handling side and then stop the handling depth adjustment (
Steps 4 to 7), specifically, a drive command is continuously output to the drive circuit (18) of the electric motor (M) for a predetermined period of time, and the vertical conveyance device (8) is swung upward by a certain angle. . However, if the reaping part (B) is not operated to the upward side in step 4, or if the set time is not continuous in step 5, the cutting depth control described later is executed (step 4.5.8).

If the stock sensor (21) is in the OFF state in step 3, it is checked whether the state is after the operation to the deep handling side in step 6, and if so, whether or not the set time has elapsed. is checked, and if it has elapsed, adjust the handling depth by the set amount to the shallow handling side, and then stop the handling depth adjustment (steps 9 to 11).
However, if the operation to the shallow handling side in step 6 has not been performed or if the set time has not elapsed in step 10, the process returns directly (step 9.
10).

Note that the set amount when adjusting to the deep handling side in step 6 is equal to the setting amount when adjusting to the shallow handling side in step 11.

The processing depth control of the control device (H) executed in step 8 will be explained based on the flowchart of FIG.

If the lower tip sensor (S2) is in the ON state and the upper tip sensor (S,) is in the ON state, the adjustment is made to the shallow handling side by the set amount after the delay time elapses (steps 80 to 82). ), if the upper tip sensor (Sυ) is in the OFF state, the handling depth adjustment is stopped after the delay time has elapsed (steps 81 and 83).

If the lower tip sensor (S2) is in the OFF state and the upper tip sensor (Sl) is in the OFF state, the adjustment is made to the deep handling side after the delay time has elapsed (step 80.
84.85), if the upper tip sensor (s+) 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 the alarm device (24) is activated. This alarm is activated to notify that floating straw is occurring (steps 84, 86, and 87).
This continues for a certain period of time after it is determined that there is a detection error.

[Another Embodiment] To carry out the present invention, the time during which the reaping section (B) is continuously operated in the upward direction is measured, and the vertical conveyance device (8) is swung downward in accordance with the measured time. - You may change the time to adjust to the deep handling side.

In addition, a potentiometer is installed at the pivot axis of the reaping section (B) to measure the angle at which the reaping section (B) is continuously operated to the upward side, that is, the amount of rise of the reaping section (B). Depending on the amount, the amount by which the vertical conveyance device (8) is swung downward, that is, the amount by which it is adjusted to the deep handling side, may be changed.

There are various means for adjusting the handling depth other than vertically swinging the vertical conveying device (8). For example, the direction in which the feed chain (7) is moved away from the threshing device (2) It may also be translated in parallel.

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 the drawing]

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 a control configuration, FIG. 2 is a front view of the handling depth detection means, and FIG. 3 4 shows the main flow of control, FIG. 4 shows a subroutine for controlling the handling depth, and FIG. 5 shows a side view of the front part of the combine harvester. (B)... Reaping section, (C)... Handling depth adjustment means, (H)... Control means, (S+), (
St)......Means for detecting summer tip of the ear, (2)...
... Threshing device, (8) ... Conveyance device.

Claims (1)

[Scope of Claims] 1. A reaping unit (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. ), as well as ear tip position detection means (S_1) and (S_2) for detecting the ear tip position of grain culms conveyed by the conveying device (8), and adjusting the handling depth in the threshing device (2). handling depth adjusting means (C), and the tip position detecting means (S_1), (S_2).
) A control means (H) for operating the working depth adjusting means (C) to maintain the working depth at a target working depth based on the information of (H) is when the reaping part (B) is operated to the upward side;
A handling depth control device for a combine harvester, which is configured to operate the handling depth adjusting means (C) toward a deeper handling side. 2. The control means (H) is configured to operate the handling depth adjusting means (C) to the deep handling side when the reaping part (B) is continuously operated to the upward side for a set time. A handling depth control device for a combine harvester according to claim 1. 3. The control means (H) controls the handling depth adjustment means (
The combined harvester handling depth control device according to claim 1, wherein the combine harvester handling depth control device is configured to operate C) to the deep handling side. 4. The control means (H) is the handling depth adjustment means (C).
4. The handling depth control device for a combine harvester according to claim 1, wherein the device is configured to adjust the operation toward the deep handling side by a set amount to the deep handling side. 5. The control means (H) controls the time for operating the handling depth adjusting means (C) to the deep handling side in accordance with the time for which the reaping part (B) is continuously operated to the upward side. 3. The combine handling depth control device according to claim 2, wherein the combine harvester handling depth control device is configured to determine. 6. The control means (H) controls the amount by which the handling depth adjustment means (C) is operated toward the deep handling side in accordance with the amount by which the reaping section (B) is continuously operated toward the upward side. 4. The combine handling depth control device according to claim 3, wherein the device is configured to determine the working depth of a combine harvester.