JPH01144906A - Control device for threshing depth in combined harvester - Google Patents

Abstract

PURPOSE:To provide the title device capable of directly operating a nipping position changing means in setting a conveyance state of grain culms to a deep or shallow threshing tendency by a conveyance state setting means and informing that the conveyance state of grain culms is correctly set to the deep or shallow threshing tendency. CONSTITUTION:A conveyance state of grain culms for a thresher is set to a deep or shallow threshing tendency by a setting switch(SW1). A lever 5 is turned in the direction of arrow (C) or (D) by a motor(M1), a conveying chain 1 is rocked in the direction of arrow (A) or (B) through a link 6 and nipping position of grain culms 40 is respectively changed to the deep or shallow threshing tendency. When the setting switch(SW1) is operated to the deep or shallow threshing tendency during reaping work, a motor(M1) is directly driven to the deep or shallow threshing side for a relatively long period.

Description

DETAILED DESCRIPTION OF THE INVENTION (Al Industrial Field of Application) The present invention relates to a combine harvester equipped with a threshing device that travels through farmland to separate and harvest grain from the husks of harvested crops, and in particular to The present invention relates to a handling depth control device for a combine harvester that changes the conveyance state of shell culms relative to the device.

(b) Conventional technology The handling teeth 54 of the handling barrel 52 are brought into contact with the ear of the culm conveyed into the culm 53, and the grains are separated from the ear. The grains separated from the culm fall downward from the receiving net 51''. Handling chamber 5
3, there are swing sorting devices 55, 56 and tows 57.
is provided. The oscillating sorting devices 55 and 56 mechanically sort the grains that have fallen together with the culm waste.
These are sorted out by wind blowing from 7a. Through the above-described mechanical sorting and wind sorting, only the fine grains with high specific gravity are harvested by the auger 58, and the culm waste is discharged to the outside by the dust exhaust fan 59.

In such a threshing device, in order to completely remove all grains from the ear of the culm and efficiently harvest only fine grains, only the ear of the husk must be guided into the handling chamber 53. Must be. However, even for the same crop in the same farmland, the length of the shell culm may differ slightly, and when the harvested shell culm is held at the same position by the conveying means and guided into the threshing device, the length of the shell culm of the crop is slightly different. Depending on the length of the culm, parts other than the sugar part may be guided into the handling chamber 53, or a part of the panicle may not be guided into the handling chamber 53. If the grains are guided into the handling chamber 53 to areas other than the sugar part, the load torque acting on the handling cylinder 52 will increase, and as the rotation speed decreases, the ability to separate grains will decrease, resulting in a decrease in threshing efficiency. invite Further, if a part of the ear is not guided into the handling chamber 53, the grain in that part is not separated from the husk, and the accuracy of the threshing operation is reduced.

For this reason, conventional combine harvesters are equipped with a culm detection means for detecting the length of the cut culm, and the gripping position of the culm conveying means is changed up or down depending on the length of the culm of the crop. There is also a system that allows the operator to set a sexual characteristic tendency or a deep treatment tendency depending on whether the operator places importance on work efficiency or work accuracy. Even when the length of the shell culm is determined to be appropriate by the conveyance state setting means, the holding position in the conveyance means is changed upward or downward by a predetermined amount. As a result, the husks of the crop are conveyed to the threshing device in a manner that allows the grain to reach the root or the depth of the grain, thereby respecting either the efficiency of the threshing operation or the accuracy of the threshing operation.

(Problems that the C1 invention attempts to solveHowever,
In the above-mentioned conventional combine harvester handling depth control device, when the conveying state setting means sets the deep handling tendency or the sexual characteristic tendency, the culm detection means always detects the appropriate length of the culm. The clamping position of the shell culm was moved to the deep handling side or shallow handling side by the same amount at the same time interval. The amount of movement of this clamping position must be within a range that does not cause the length of the culm to become incorrect in the culm detection means, and the amount of movement of the clamping position in the direction set by the conveyance state setting means must not be too large. I can't. For this reason, the clamping position does not change much even immediately after the conveyance state setting means sets the deep handling tendency or the sexual characteristic tendency, and the operator cannot confirm the change in the clamping position.

An object of the present invention is to change the conveyance state of the shell culm by changing the clamping position of the shell culm to the deep handling side or the shallow handling side immediately after the deep handling tendency or sexual characteristic tendency is set by the conveyance state setting means. To provide a deep handling control device for a combine harvester that allows an operator to recognize that the deep handling tendency or sexual characteristic tendency is correctly set.

(Means for Solving Problem d1) The handling depth control device for a combine harvester of the present invention includes a culm detection means for detecting the length of the culm of a crop, and a clamping position of the culm according to the detection result of the culm detection means. A clamping position changing means for changing the holding position, and a conveyance state setting means for setting the conveyance state of the shell culm relative to the threshing device to a deep treatment tendency or a sexual characteristic tendency, In a combine handling depth control device that operates a clamping position changing means at predetermined time intervals in a direction set by a state setting means, when the transport state of the culm is set to a deep handling tendency or a sexual characteristic tendency by the transport state setting means. The present invention is characterized in that an immediate changing means is provided for immediately operating the holding position changing means.

(e) Effect In the present invention, when the conveyance state setting means sets the conveyance state to the deep treatment tendency or the sexual characteristic tendency, the immediate change means immediately operates the clamping position change means. Therefore, when the operator makes a setting using the conveyance state setting means, the clamping position of the culm changes in the direction of the setting.

(f) Embodiment FIG. 2 is an external perspective view of a combine harvester equipped with a handling depth control device according to an embodiment of the present invention.

The combine harvester 11 travels within the farmland by the rotation of the crawler 15, and uses the reaping section 12 to reap the crops from the base of the stock.

The culms of the crop harvested in the reaping section 12 are guided to a threshing device 14 by conveyor chains 1 and 8. This threshing device 14 has the same structure as the threshing device shown in FIG. 7 described in the prior art. Further, a control section 13 is provided in front of the upper surface of the combine 11. This control unit 13 includes a steering lever 16 and a setting switch SW I to be described later.
7! l<equipped.

FIG. 1 is a block diagram showing the configuration of a handling depth control device for the combine harvester.

The CPU 31 receives on/off data of the tip sensors SE1 and SE2 provided inside the reaping section 12 via the I10 interface 34.

These tip sensors SEI and SE2 correspond to the culm detection means of the present invention. Further, the status of the setting switch SWI provided in the control section 13 is input to the CPU 31.

The setting switch SWI is a conveyance state setting means of the present invention, and by operating it from the neutral position in the direction of arrow E or F, the conveyance state of the husk to the threshing device 14 can be set to a deep handling tendency or a root tendency.

The installation position of the tip sensors SEI and SE2 is conveyor chain 1.
It corresponds to the upper part near the rear end of. The conveyor chain 1 is swingable in the direction of arrow A or B with its front end as a fulcrum. The operation of the lever 5 is transmitted to the conveyor chain 1 via the link 6.

Rotation of a motor M1 is transmitted to this lever 5 via a transmission 3 and a shaft 4. Therefore, when the motor M1 rotates in the direction of arrow C or D, the lever 5 also rotates in the direction of arrow C or D. Rotation of lever 5 in the direction of arrow C or D is transmitted to conveyance chain 1 via link 6, and conveyance chain 1 swings in the direction of arrow A or B. When the conveyor chain l swings in the direction of the arrow A, the gripping position of the culm 40 in the conveyor chain 1 moves upward, and the threshing device 14
The state of transportation to is the tendency to be sexual. On the other hand, when the motor 1 rotates in the direction of the arrow and the conveyor chain 1 swings in the direction of the arrow B, the position where the husk culm 40 is held in the conveyor chain 1 moves downward, and the conveyance state of the husk with respect to the threshing device 14 changes. The CPU 31, which has a tendency to be used more seriously, executes processing according to a program written in advance in the ROM 32, and outputs control data to the motor driver 35 based on data from the tip sensors SEI and SE2 and the setting switch SWI. Motor driver 35 drives motor M1 according to this control data. Also, as shown in Figure 3, C
Memory area MAL of RAM33 connected to PU31
-MA3 are assigned to timer TI, timer T2 and counter C, respectively.

FIGS. 4 and 5 are flowcharts showing the processing procedure of the processing depth control device of the combine harvester. When the reaping work is started, the CPU 31 checks the on/off state of the tip sensors SEI and SE'2 (nl , n2). If the lower tip sensor SEI is not on, it is determined that the length of the culm being transported is too short, and the motor M1 is rotated in the direction of the arrow (n3). As a result, the conveying chain 1 swings in the direction of arrow B, and the conveying state to the threshing device 14 changes to the deep handling side.

In addition, if both the tip sensors SEI and SE2 are turned on, it is determined that the length of the culm is too long, and the mower Ml is rotated in the direction of arrow C (n4), and the conveying chain 1 is moved in the direction of arrow A. do. As a result, the gripping position of the shell culm moves upward, and the conveyance state relative to the threshing device 14 changes to the shallow handling side. When the tip of the culm is located between the lower tip sensor SEI and the upper tip sensor SE2, it is determined that the length of the culm is appropriate, and it is determined whether the switch SWl is turned on or not. Perform a check (n5). Setting switch SW1
is turned off and the operator instructs transport of the culm in a neutral state, the timer TI assigned to the memory area MAI is turned off and the process returns to nl (A9). In the state where the setting switch SW1 is not turned on as described above, nl--n 2-e n 5- n 9-"
Repeat the process of n 1 and set the tip sensors SEI, SE
Motor M1 is driven based only on the on/off state of No.2.

If the setting switch SWI is on with the tip located between the tip sensors SEI and SE2, a check is made to see if timer T1 has timed up (n
6) If the timer T1 is up, the motor M1 is driven to the deep handling side or the shallow handling side depending on the operating state of the setting switch SWI.
Clear (n8). If the timer T1 has not timed up at n6, the process returns to nl. therefore,
When setting switch SWI is operated to deep handling side or shallow handling side, yl 1-e n2-+ n5-1 n6
→By the process of n1, the timer T1 is waited for to time up, and each time the timer T1 times up, the deep handling side or shallow handling side is output to the motor M1. The time measured by the timer T1 is the time S4 shown in FIG. 6, which is usually about 2 to 3 seconds.

If the switch SWI is operated while executing the process nl-+n2-+n5→n9→n1, the interrupt process shown in FIG. 5 is executed. That is, when the switch SWI is operated to the deep handling side, the motor M1 is driven in the direction of the arrow for the time SEI shown in FIG. 6 (n 11 → n 12) e
This time SEI is approximately twice the driving time S3 in nl, and the amount of movement of the conveyor chain 1 in the direction of arrow B is approximately twice as long.

Furthermore, when the setting switch SWI is operated to the shallow handling side, the motor Ml is moved in the direction of arrow C (n11-n13
). The drive time to the shallow handling side is also the time SEI shown in Figure 6.
It is. After motor Ml is driven at n12 or n13, timer T2 is turned on (n14). This timer T2 measures a time SE2 shown in FIG. Wait for timer T2 to time up and return to the main routine (n
15).

In the above processing, nil to n13 correspond to the instant change means of the present invention. As described above, when the setting switch SWI is operated from the neutral state (off state) to the deep handling tendency or the root tendency during reaping work, the motor M1 is immediately switched to the deep handling side or to the deep handling direction for a relatively long period of time (time 5EI). Driven to the shallow handling side. This allows the operator to confirm the operation of the motor Ml, which is the clamping position changing means. After a time SE2 has elapsed, the motor 1 is driven at a duty ratio of time S3/time s4. The drive time S3 at this time is
This is the time during which the tip in the neutral state does not exceed SE2 of the upper sensor or fall below lower sensor sE1 even if output is performed multiple times at intervals of (33+34) times. Therefore, according to this embodiment, when the state of transporting the crop to the threshing device 14 is set from the neutral state to either the deep handling tendency or the root tendency, the shell culm clamping position is immediately changed by a relatively large amount, and thereafter, The shell culm clamping position can be changed to the deep handling side or the shallow handling side in small amounts at regular time intervals.

(g) Effects of the Invention According to this invention, when the conveyance condition of the culm is set to the deep treatment tendency or the root tendency by the conveyance condition setting means,
The immediate changing means immediately changes the clamping position of the culm. Therefore, the operator can easily confirm that the conveyance state setting means and the clamping position changing means have operated effectively.

[Brief explanation of the drawing]

Figure 1 is a block diagram showing the configuration of a combine harvester handling depth control device that is an embodiment of the present invention, Figure 2 is an external view of a combine harvester equipped with the same handling depth control device, and Figure 3 is the same handling depth control device. Memory map of the main part of RAM that constitutes a part of the device, 4th
5 and 5 are flowcharts showing the processing procedure of the handling depth control device, and FIG. 6 is a timing chart showing the operating states of the conveying state setting means and the clamping position changing means in the handling depth control device. . Moreover, FIG. 7 is a schematic side cross-sectional view showing the configuration of a threshing device mounted on a general combine harvester including an embodiment of the present invention. 1-8 feed chain, 14-threshing device, ML-motor, SEI, 5E2-tip sensor, 5WI-setting switch.

Claims (1)

[Claims] (1) A culm detection means for detecting the length of the culm of a crop; a clamping position changing means for changing the clamping position of the culm according to the detection result of the culm detection means; a conveyance state setting means for setting a handling tendency or a shallow handling tendency, and when the culm detection means detects an appropriate value, the clamping position changing means is moved in the direction set by the conveyance state setting means at predetermined time intervals. What is claimed is: 1. A handling depth control device for a combine harvester which is operated by a combine harvester, comprising: an immediate change means for immediately operating a clamping position change means when a conveyance state setting means is enabled.