JPS6368019A - Handling depth control apparatus of combine - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (a) Industrial Application Field The present invention relates to a combine harvester that is equipped with a traveling device and a threshing device, and that travels through a farm to harvest grain, separate the grain from the grain culm, and harvest the grain. In particular, the present invention relates to a combine harvester in which the clamping position of the harvested grain stalks is automatically controlled while the harvested grain stalks are being conveyed to a threshing device.

To) Summary of the Invention To summarize, the combine harvester handling depth control device according to the present invention includes a method for controlling the clamping position control means in order to ensure that the clamping position of the conveying means is controlled within a preset range. The output measuring means is provided with an output measuring means for measuring the number of outputs or the output time, and the output measuring means is not reset when the output of the output means stops, but is reset when the output direction of the output means is reversed, The output of the output means is stopped when the output measuring means measures the output a certain number of times or for a certain period of time.

tc+Prior Art] The Nbain rotates a handling barrel having handling teeth in a handling chamber to separate grains from sugar parts. Therefore, in order to reduce the rotational resistance of the handling cylinder as much as possible, only the sugar portion must be guided into the handling chamber, and in order to eliminate any unhandled portion, the entire ear portion 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 sugar part of all crops, it is necessary to It is necessary to maintain a constant distance. Therefore, a tip detection means for detecting the tip of the harvested grain culm and a clamping position control means for changing the clamping position of the grain culm in the conveying means are provided, and the clamping position of the conveying means is adjusted according to the length of the tip detected by the spear tip detecting means. The position is controlled to keep the distance from the transport means to the sugar part constant.

The movement range of the clamping position of the conveying means by this clamping position control means is limited to a predetermined range due to physical reasons such as space, and limit switches are provided near the limit points in the deep handling direction and shallow handling direction. There is. When this limit switch is activated, the output of the control signal to the clamping position control means is stopped. Further, in consideration of the case where the limit switch does not operate normally due to clogging of the culm, etc., a stopper is provided that comes into contact with the movable part to mechanically limit the control range of the clamping position by the clamping position control means.

(d1 Problems to be Solved by the Invention In the conventional combine harvester deepest control device described above, when the limit switch does not operate normally due to culm clogging, etc., the movable part of the clamping position control means comes into contact with the stopper and moves. However, during this time, the control signal to the clamping position control means continues to be output, causing overcurrent to occur in electrical components such as motors and relays, which may result in failure.

An object of the present invention is to reliably stop the output of a control signal when the clamping position moves by a predetermined amount even if the limit switch does not operate normally, thereby avoiding contact between the movable part of the clamping position control means and the stopper. An object of the present invention is to provide a deep control device for a combine harvester that can prevent the occurrence of failure of electrical parts.

(Means for Solving Problem 1) The deepest control device for a combine harvester of the present invention can be summarized as follows: a tip detection means for detecting the length of a harvested grain culm; and a conveying means for holding the grain culm and guiding it to a threshing device. and a clamping position control means for changing the clamping position of the grain culm in the conveying means to a deep handling direction or a shallow handling direction, and an output means for outputting a control signal to the clamping position control means according to the detection result of the ear tip detection means. In the deepest control device for a combine harvester, the output measuring means measures the number of outputs or the output time of the output means, and the output measuring means measures the output of the output means when the output measuring means measures the output a certain number of times or for a certain period of time in one direction. The present invention is characterized in that it includes an output stopping means that stops the output, and a measurement updating means that does not reset when the output of the output means stops, but resets when the output direction of the output means is reversed.

(f) Effects According to the present invention, (1) The output of the control signal to the clamping position control means is measured by the output measurement means.

(2) When the output measuring means continuously measures a predetermined amount of output in one direction, the output stopping means stops outputting the control signal from the output means.

(2) When the output direction of the control signal of the output means is reversed, the content of the output measurement means is updated by the measurement update means.

(gl Embodiment FIG. 2 is a schematic side cross-sectional view showing the configuration of a combine harvester equipped with a deepest control device according to an embodiment of the present invention.

The combine 1) is equipped with crawlers 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 1). A cutting blade 25 is provided in the reaping part 12 of the harvester, and the crop 40 located in front of the combine harvester 1) is reaped 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. Moreover, in the upper part of the reaping part 12, there is a one side ear tip sensor s1 and an upper side ear tip sensor S2.
is provided. The lower ear tip sensor S1 and the upper ear tip sensor s2 are ear tip detection means of the present invention for detecting the ear tip of the harvested grain culm.

A threshing device 10 is provided inside the combine 1). This threshing device IO has a handling cylinder 1 having a plurality of handling teeth 15a.
It is comprised of a handling chamber 16 rotatably equipped with 5, a sludge 17, a swing sorting device 18, and a fine grain auger 19.

The rear part of the combine harvester 1) is open and serves as an unloading section 21. Inside the combine 1), there is a conveyor chain l between the reaping section 12, the threshing device 10, and the discharge section 21.
and a feed chain 14 are provided.

The conveying chain 1 and the feed chain 14 constitute the conveying means of the present invention, and both hold the harvested grain culms.

FIG. 1 is a schematic diagram showing a handling depth control device included in the combine harvester.

One end of a link 6 is attached to the conveyance chain 1. The other end of the link 6 is supported by one end of the actuator 5. The other end of the actuator 5 is fixed to the rotating shaft 4. The rotation of the extraction motor 2 is transmitted to the rotating shaft 4 via the gear box 3. Further, the extraction motor 2, gear box 3, rotating shaft 4, actuator 5, and link 6 constitute the clamping position control means of the present invention. The extraction motor 2 can rotate in both forward and reverse directions, and when the extraction 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 conveying chain 1 via the link 6. As a result, the conveyor chain 1 moves in the direction of arrow A or B, and the crop 4
The clamping position of 0 moves to P, -P.

Therefore, when the extraction motor 2 is rotated in the direction of the arrow C, the conveyance chain 1 moves in the direction of the arrow C, and the distance between the tip of the crop 40 and the clamping position P1 becomes shorter. Conversely, when the extraction motor 2 is rotated in the direction indicated by the arrow, the conveyance chain 1 moves in the direction indicated by the arrow, and the distance between the tip of the crop 40 and the clamping position P becomes longer. From the above, the removal motor 2 is rotated in the direction of arrow C during shallow handling control, and the removal motor 2 is rotated in the direction of arrow C during deep handling control.

Near the conveyance chain 1, mint switches SWI and SW2 are provided to detect this. Each of limit switches SWI and SW2 detects conveyance chain 1 moving in the direction of arrow B or arrow A. When the limit switches SWI and SW2 are activated, the drive of the motor 2 is stopped. Furthermore, stoppers 7a and 7b are provided near the conveyance chain 1. This stopper? a and 7b come into contact with the conveyance chain 1 that has moved in the direction of arrow B or A, and physically restrict the movement of the conveyance chain 1. In this way, the conveyor chain 1 is connected to the limit switch S.
The movement range is regulated by WI, SW2 and stoppers 7a and 7b, and the control range of the clamping position is limited to P1 to P.

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

Detection data from the lower tip sensor S8, the upper tip sensor S2, the limit switches SWI, SW2, and the stock sensor 22 are input to the CPU 31 via the I10 interface 34. A ROM 32 connected to the CPU 31 stores a program for calculating control data for the extraction motor 2 based on input detection data. CPU
31 calculates control data according to this program, and
10 motor driver 35 via interface 34
Output to. A part of the RAM 33 is allocated to a working area when calculating control data. Also R.A.
Memory areas M1 and M2 of M33 are allocated to counters Cs and Cd, respectively, which will be described later. The motor driver 35 controls the extraction motor 2 based on the control data.
to drive.

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

When the photosensitive drum work is started, it is checked whether automatic control has been selected (nlL) If automatic control has been selected, it is checked whether the control conditions are satisfied (n2). The control conditions checked here are whether the threshing switch that selects the threshing operation is turned on;
For example, whether or not a stock sensor that detects the presence or absence of a grain culm to be harvested is turned on. When such control conditions are satisfied, the clamping position of the conveyor chain 1 is controlled in accordance with the on/off state of the tip sensors s, , S2. First, it is checked whether the lower tip sensor S1 is on (n3), and if the lower tip sensor S is on, the state of the upper tip sensor S2 is checked (n4).
). If only the lower tip sensor S1 is on, the output to the extraction motor 2 is stopped (n3→n4→n6).

When both the ear sensors s, 32 are on, it is determined that the length of the transported grain culm is long, and an operation is performed to control the nipping position to the shallow handling side. That is, first, the contents of the counter Cs allocated to the memory area M1 are incremented, and the contents of the counter Cd allocated to the memory area M2 are cleared (n7). After this, counter Cs
Check whether the content of is below the standard value A (
n8). This reference value A is determined by the limit switches SWI, SW2 or the stopper when the conveyor chain 1 moves continuously in one direction from the intermediate clamping position P2. a, 7b
This is the number of outputs required to reach the appropriate position. When the value of counter C3 is less than this reference value A, output is given to motor 2 in the shallow handling direction (n9), and when the content of counter C3 exceeds reference value A, output is given to the extraction motor 2. (n6).

Even if the lower tip sensor S1 is not on, it is checked whether the upper tip sensor S2 is on (n
lO). When both tip sensors S1 and S2 are off, control is performed in the deep handling direction. That is, the contents of the counter Cs are cleared and the contents of the counter Cd are incremented (n1)), and it is checked whether the contents of the counter Cd are less than or equal to the reference value A (n12). When the contents of the counter Cd are below the reference value A, a deep handling side output is sent to the extraction motor 2 (n13), and when the content of the counter Cd exceeds the reference value A, the output is sent to the extraction motor 2. Stop the output (n15). If only the upper tip sensor S2 is on, it is determined that culm clogging has occurred and a warning is issued (n14). In the above, n7. nll corresponds to the output measuring means of the present invention, and n5. n? , nil also correspond to the measurement update means, and n8→n6. Similarly, n12→n15 corresponds to the output stopping means.

As described above, according to this embodiment, the memory area M
The number of outputs to the extraction motor 2 in the shallow handling direction or the deep handling direction is counted by the counters Cs and Cd assigned to 1 and M2, respectively. Both counters Cs and Cd are reset when the other counter is counting the number of outputs, and are not reset when the output to the extraction motor 2 is stopped.

In this embodiment, a counter that coefficients the number of outputs is used as the output measuring means, but the same effect can be obtained by using a timer that displays the output time.

(H1 Effects of the Invention According to the present invention, the output measuring means measures the number of outputs or the output time of the control signal to the clamping position control means, and the output measuring means measures the output time in either the shallow handling direction or the deep handling direction. When the output of the control signal is continuously measured for a certain number of times or for a certain period of time, the output of the output means can be stopped.

Therefore, even if the limit switch is not operating properly due to a clogged culm, etc., if the clamping position moves continuously in one direction by a predetermined amount, the output of the control signal will stop, causing a failure of electrical components such as motors and relays. Moreover, the measurement result of the output measuring means is not reset when the output of the output means stops, but is reset only when the output direction of the output means is reversed. Therefore, even if the output means intermittently outputs in the same direction while the conveyance means is near the limit position of the control range, when the total number of outputs or the total output time reaches the predetermined amount, The output of the output means is stopped, and failure of electrical components and devices due to overcurrent can be reliably prevented.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram showing the main parts of a combine harvester equipped with a processing depth control device according to an embodiment of the present invention, Fig. 2 is a schematic side cross-sectional diagram showing the configuration of the combine harvester, and Fig. 3 is a control of the combine harvester. FIG. 4 is a flowchart showing the operation of the processing depth control device included in the combine. 1-fi! Feed chain, 2-extraction motor, 7a, 7b-
Stopper, )SWI, 5W2-limit switch, SL-lower tip sensor, S2-upper tip sensor.

Claims (1)

[Claims] (1) An ear detection means for detecting the length of the harvested grain culm, a conveyance means that clamps the grain culm and guides it to the threshing device, and changes the gripping position of the grain culm in the conveyance means to a deep handling direction or a shallow handling direction. In a combine harvester handling depth control device comprising a clamping position control means and an output means for outputting a control signal to the clamping position control means according to a detection result of the tip detection means, the number of outputs or the output time of the output means is controlled. An output measuring means for measuring, an output stopping means for stopping the output of the output means when the output measuring means has measured the output for a certain number of times or a certain period of time in one direction, and an output stopping means for stopping the output of the output means when the output of the output means has stopped. A handling depth control device for a combine harvester, comprising: measurement updating means for resetting when the output direction of the output means is reversed.