JPH0514742Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Technical field This invention relates to a combine harvester that is equipped with a traveling device and a threshing device, and that travels around a farm to reap grain, separate the grain from the grain culm, and harvest it. This invention relates to a combine harvester that automatically controls the clamping position of grain culms while conveying the harvested grain culms to a threshing device.

(b) Summary of the invention In summary, the handling depth control device for a combine harvester according to this invention is designed to prevent the handling depth from becoming abnormal when resuming travel during reaping work. When it is no longer detected, the control is continued to the deep handling side for a predetermined period of time to prevent the conveyance means from moving excessively to the deep handling side.

(c) Prior Art and its Disadvantages A combine harvester rotates a handling barrel with handling teeth in a handling chamber to separate grains from ears. Therefore,
In order to reduce the rotational resistance of the handling cylinder as much as possible, only the ears must be guided into the handling chamber, and in order to eliminate any unhandled ears, the entire ear must be guided into the handling chamber. However, even for the same crop in the same farmland, the length of the grain culm varies, and in order to efficiently and reliably separate grains from the ears of all crops, it is necessary to It is necessary to maintain a constant distance. Therefore, a tip detecting means for detecting the tip of the harvested grain culm and a device for changing the gripping position of the grain culm in the conveying means are provided, and the conveying means is adjusted according to the height of the grain culm detected by the ear tip detecting means. The clamping position is changed to keep the distance from the conveyance means to the ears constant. Generally, a plurality of these ear tip detection means are provided in the vertical direction, and the clamping position changing means is operated so that the tip of the grain culm is located between the uppermost and lowermost ear tip detection means. This is because the grain culm is not always conveyed in an upright state and the frequent operation of the clamping position changing means hinders the stabilization of the work, so a dead zone is created in the control of the clamping position. This is to provide a.

However, if the combine harvester stops running during threshing work using such a combine harvester, the ear tip that should be detected by the ear tip detection means is not harvested, and all the ear tip detection means stop detecting the ear tip. Therefore, the combine determines that the length of the grain culm of the crop being harvested is short and changes the gripping position of the conveying means to the deep handling side. However, since there is no tip to be detected, no matter how much the conveying means is moved to the deep handling side, the tip detecting means does not detect the tip, and the conveying means reaches the limit position where it can be moved to the deep handling side and does not operate. Stop. For this reason, when the combine harvester resumes running later, the harvested grain culms are transported in an abnormally deep state, which not only causes extremely large rotational resistance of the handling barrel in the handling chamber, but also causes the culms to become clogged in the transport means. This had the disadvantage of reducing the efficiency of threshing work.

(d) Purpose of the invention The purpose of this invention is to change the clamping position of the conveying means to the deep handling side by a predetermined amount when all the ear tip detection means no longer detect the ear tip, and to prevent the tip detection means from detecting the ear tip for a long time. The conveying means does not move excessively to the deep handling side even when the tip of the ear is not detected continuously, and the handling depth does not become abnormal even when restarting traveling after temporarily stopping during reaping work. Prevents the increase in rotational resistance of the handling cylinder in the handling room and the occurrence of culm clogging,
It is an object of the present invention to provide a handling depth control device for a combine harvester that can prevent a decrease in the efficiency of threshing work.

(e) Structure of the invention The handling depth control device for a combine harvester of this invention includes at least two ear tip detection means, upper and lower, for detecting the tip of grain culms held in the conveying means, and a conveying means that detects the tip of the grain culm in accordance with the detection result of the grain culm detection means. In a combination harvester processing depth control device, the combining depth control device is provided with a clamping position changing means for changing the clamping position of grain culms in a combine harvester; A timer that measures a predetermined time less than or equal to the time taken by the change means to move the distance between the upper and lower end tip detection means, and a timer that keeps time until the timer times up when all the tip detection means do not detect the tip. Handling depth control means is provided for activating the gripping position changing means and changing the gripping position of the conveying means to the deep handling side.

(f) Effect With the above configuration, when all the ear tip detection means stop detecting the ear tip, the handling depth control means changes the clamping position of the conveying means to the deep handling side.

The handling depth control means is continuously enabled for a predetermined period of time counted by a timer.

(g) Effect of the invention According to this invention, when all the ear tip detection means no longer detect the ear tip, the duration of the operation of changing the gripping position of the conveying means to the deep handling side is regulated by a timer. be able to. That is, even if all the tip detection means do not detect the tip for a long time, the movement of the conveying means to the deep handling side will not continue for more than the time counted by the timer. Therefore, even if the combine harvester stops traveling during reaping work, the clamping position of the conveyance means will not move excessively to the deep handling side, and the handling depth will not be in an abnormal state when the combine resumes traveling. . Therefore, an excessive load is not applied to the handling cylinder or the culm is clogged in the conveying means, and a decrease in the efficiency of the threshing operation can be prevented.

(h) Embodiment FIG. 2 is a schematic side view showing the configuration of a combine harvester equipped with a handling depth control device, which is an embodiment of this invention.

The combine 11 is equipped with a crawler 13 below. The crawler 13 is rotated by a drive device (not shown) and travels within the farmland. A reaping section 12 is provided at the front of the combine 11. This reaping section 12 is equipped with reaping teeth 25, and the combine harvester 1
A crop 40 located in front of 1 is harvested from the base of the plant. The reaping unit 12 is provided with a stock sensor 22 that detects the presence or absence of crops to be reaped. Furthermore, a lower tip sensor S ₁ and an upper tip sensor S ₂ are provided at the upper part of the reaping section 12 . The lower ear tip sensor S ₁ and the upper ear tip sensor S ₂ are ear tip detection means and detect the ear tip of the harvested grain culm.

A threshing device 10 is provided inside the combine 11. This threshing device 10 includes a handling chamber 1 rotatably equipped with a handling barrel 15 having a plurality of handling teeth 15a.
6, a stirrer 17, an oscillating sorting device 18, and a fine grain auger 19. Combine 11
The rear part is open and serves as a discharge section 21. Inside the combine 11, a conveyance chain 1 and a feed chain 14 are provided between the reaping section 12, the threshing device 10, and the discharge section 21. The conveyance chain 1 and the feed chain 14 are both conveyance means and hold the harvested grain culms.

FIG. 1 is a schematic diagram showing the main parts of the combine harvester, and shows an example of a clamping position changing means.

One end of a link 6 is attached to the conveyance chain 1. The other end of link 6 is actuator 5
is supported at one end. The other end of the actuator 5 is fixed to the rotating shaft 4. The rotation of the depth handling motor 2 is transmitted to this rotating shaft 4 via a gear box 3. Further, the rotation of the rotating shaft 4 is detected by a motor volume 7. The handling depth motor 2 can rotate in both forward and reverse directions, and when the handling depth motor 2 rotates in the direction of arrow C or D, the rotating shaft 4 also rotates in the direction of arrow C or D. This rotation of the rotating shaft 4 in the direction of arrow C or D is transmitted from the actuator 5 to the conveyance chain 1 via the link 6. As a result, the conveyance chain 1 moves in the direction of arrow A or B, and the clamping position of the crop 40 changes from P ₁ to P ₃ . Therefore, when the handling depth motor 2 is rotated in the direction of arrow C, the conveyance chain 1 moves in the direction of arrow A, and the distance between the tip of the crop 40 and the clamping position _P1 becomes shorter.
Conversely, when the handling depth motor 2 is rotated in the direction of arrow D, the conveyance chain 1 moves in the direction of arrow B, and the distance between the tip of the crop 40 and the clamping position _P1 becomes longer. From the above, during shallow handling control, move the depth handling motor 2 to arrow C.
During deep handling control, the depth handling motor 2 is rotated in the direction of arrow D. The motor volume 7 detects the rotation angle of the rotary shaft 4 and limits its rotation range to a movable range of the conveyance chain 1.

FIG. 3 is a block diagram of the control section of the combine harvester.

Detection data from the lower tip sensor S ₁ , the upper tip sensor S ₂ , the stock sensor 22 and the motor volume 7 are input to the CPU 31 via the I/O interface 34 . Further, ON data of the threshing switch 24 is input. connected to CPU31
The ROM 32 stores a program that calculates control data for the handling depth motor 2 based on input detection data. The CPU 31 calculates control data according to this program and outputs it to the motor driver 35 via the I/O interface 34. A part of the RAM 33 is allocated to a working area when calculating control data. The motor driver 35 drives the handling depth motor 2 based on the control data.

With the above configuration, the lever 23 can be used during threshing work.
The threshing operation is selected by the operation, and the threshing switch 24 is turned on. As the combine harvester 11 travels through the farmland, the crops 40 are guided into the combine harvester 11 from the reaping section 12, and the plant head sensor 22 is turned on.
The crop 40 guided into the combine harvester 11 has cutting teeth 25
and guided to the threshing device 10.

In the threshing device 10, grains are threshed from the ears in a handling chamber 16. The threshed grains fall downward, and are subjected to mechanical sorting and wind sorting by the oscillating sorting device 18 and the well 17, respectively. Through this sorting, the grains are separated into fine grains and culm waste, and the fine grains are stored in the hopper 20 by the fine grain auger 19, while the culm waste is discharged to the outside from the discharge section 21.

FIG. 4 is a flowchart showing the operation of the handling depth control device of the combine harvester.

After combine harvester 11 starts running, threshing switch 2
4 and the stock sensor 22 are turned on, it is assumed that the control conditions are satisfied and the depth control is started (n1→n2).
First, it is checked whether the lower tip sensor S ₁ is detecting the tip, and then the upper tip sensor S ₂ is checked.
Checks whether the tip is detected.
If only the lower tip sensor _S1 is on, it is determined that the tip position is within the appropriate range, the handling depth motor 2 is stopped, and the content of the flag F is set to "0" (n3→n4 →n5).

When both the lower tip sensor S ₁ and the upper tip sensor S ₂ detect the tip, it is determined that deep handling is in progress, and the depth handling motor 2 is driven to the shallow handling side, that is, in the direction of arrow C. , set the contents of flag F to “0” (n2
→n3→n6→n7).

If the lower tip sensor S ₁ does not detect the tip and the upper tip sensor S ₂ detects the tip, it is determined that the culm is clogged, and a buzzer or warning lamp notifies the operator to that effect, and a flag is set. Set the contents of F to “0” (n2→n8→n9→
n10).

If neither the lower tip sensor _S1 nor the upper tip sensor _S2 detects the tip, the contents of the flag F are checked in n11. If the content of flag F is not "1", the process advances to n12 and timer T is set. Next, at n13, the depth handling motor 2 is driven to the deep handling side, that is, in the direction of arrow D, and at n14, the content of the flag F is set to "1". On the other hand, if the content of the flag F is "1" at n11, the process advances to n15 and checks whether or not the timer T has timed up. When the timer T has not timed up, the handling depth motor 2 is driven to the deep handling side (n15→n12), and when the timer T has timed up, the handling depth motor 2 is stopped (n15→n16). In the above, n11 to n16 correspond to the deep-side control means of the present invention.

If the tip of the grain culm thus harvested is located between the lower tip sensor _S1 and the upper tip sensor _S2 , it is determined that the conveyance condition is appropriate, and n1→
Repeat the operation n2 → n3 → n4 → n5 → n1. As a result, the current clamping position of the conveying means is maintained.

If both the lower ear tip sensor S ₁ and the upper ear tip sensor S ₂ detect the ear tip, it is determined that the grain culm is in the gripping position, and the operation is n1 → n2 → n3 → n6 → n7 → n1. Repeat. As a result, the gripping position of the conveying means is changed to the shallow handling side. When the upper tip sensor _S2 no longer detects the tip due to this operation, n3
→n4 and the operation of the transport means stops.

When only the upper tip sensor _S2 is turned on when culm clogging occurs, the operation of n1→n2→n3→n9→n10→n1 is repeated and a warning continues to be issued until the culm clogging is resolved.

When both the lower tip sensor S ₁ and the upper tip sensor S ₂ no longer detect the tip, n1→n2→n8→
Through the operations n11 to n16→n1, the clamping position of the conveyance means is moved to the deep handling side. When proceeding to n11 for the first time, the content of flag F is “0”, so n11→
Proceed as n12 → n13 → n14 → n1. From this point on, flag F
Since the content of is "1", the handling depth motor 2 is driven to the deep handling side until the timer T times out, and the gripping position of the conveyance means continues to be changed to the deep handling side. However, when the predetermined time elapses and the timer T times out, the lower tip sensor _S1 and the upper tip sensor
Even if the condition in which both S ₂ do not detect the tip continues, the change to the deep handling side is not made, and the clamping position of the conveyance chain does not become excessively on the deep handling side.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of the main parts of a combine harvester having a processing depth control device according to an embodiment of this invention, and is a diagram showing an example of a clamping position changing means, and FIG. 2 is a schematic side view showing the structure of the combine harvester. FIG. 3 is a block diagram of the handling depth control device of the combine, and FIG. 4 is a flowchart showing the operation of the handling depth control device. 1... Conveyance chain, 2... Depth handling motor, S ₁ ...
…Lower tip sensor, S ₂ …Upper tip sensor.

Claims (1)

[Scope of Utility Model Registration Claim] At least two upper and lower ear tip detection means for detecting the tip of the grain culm held by the conveying means, and changing the gripping position of the grain culm on the conveying means according to the detection result of the ear tip detection means. In a combine harvester processing depth control device comprising a clamping position changing means, the clamping position changing means detects the tip of the tip at both upper and lower ends for a response time greater than or equal to the response time of the clamping position changing means to the detection signal of the tip detecting means, and within this response time. When all the tip detection means do not detect the tip, the clamping position changing means is enabled continuously until the timer times up, and the conveyance A handling depth control device for a combine harvester, comprising: handling depth control means for changing the clamping position of the means to the deep handling side;