JPH0683612B2 - Combine depth control device - Google Patents

Description

Description: (a) Field of industrial use The present invention relates to a combine that is equipped with a threshing device, travels in farmland, and separates and harvests grains from the grain culms of crops that have been mowed. The present invention relates to a combine handling depth control device that changes the transport state of grain culms to the device.

(B) Conventional Technology As shown in FIG. 7, a threshing device mounted on a combine has a handling barrel 52 axially supported in a handling chamber 53, and is handled at the spikes of grain culms transported into the handling chamber 53. The handle teeth 54 of the body 52 are brought into contact with each other to separate the grain from the ear. The grain separated from the grain culvert falls downward from the net 51. Below the handling room 53 is a swing sorting device 55,5.
6 and Toumi 57 are equipped. Swing sorter 55,56
Mechanically sorts the grains that have fallen together with the shavings, and the toumi 57 wind-sorts them by blowing air from the fan 57a.
By the above mechanical sorting and wind sorting, only the fine grains having a large specific gravity are harvested by the auger 58, and the dust is discharged to the outside by the dust exhaust fan 59.

In such a threshing device, only the spikes of the culms must be introduced into the handling room 53 in order to completely separate all the grains from the spikes of the culms and to efficiently harvest only the fine grains. I have to. However, even if the crops are the same crop in the same farmland, the length of the grain culm may be slightly different, and if the same position of the grain culm cut by the transport means is sandwiched and guided into the threshing device, the grain culm of the crop is Depending on the length of the ears, there was a case where parts other than the ears were introduced into the handling room 53, or a part of the ears was not introduced into the handling room 53. When the parts other than the spikes are introduced into the handling chamber 53, the load torque acting on the handling barrel 52 increases, and the ability to remove the grains decreases with a decrease in the rotation speed, which reduces the threshing work efficiency. Invite. Further, when a part of the spike is not guided into the handling room 53, the grain of the part is not separated from the culm, and the precision of threshing work is reduced.

For this reason, in the conventional combine harvester, a grain culm detecting means for detecting the length of the harvested grain culm is provided, and the holding position of the grain culm conveying means is changed up and down according to the length of the grain culm of the crop. In addition, there has been a system in which the operator can set a shallow handling tendency or a deep handling tendency depending on whether the work efficiency or the work accuracy is important. Even when the length of the grain culm is more appropriate than the conveying state setting means, the holding position in the conveying means is changed to the upper side or the lower side by a predetermined amount. As a result, the grain culms of the crop are conveyed to the threshing device in a shallow or deep handling, and either the threshing work efficiency or the threshing work accuracy is respected.

(C) Problems to be Solved by the Invention However, in the above-mentioned conventional combine handling depth control device, when the handling state setting means sets the deep handling tendency or the shallow handling tendency, the grain culm detecting means is suitable. When detecting the length of different grain culms, the pinching position of grain culms was always moved to the deep or shallow handling side by the same amount at the same time interval. The amount of movement of the sandwiching position must be within a range in which the length of the grain culm is not inadequate in the grain culm detecting means, and the amount of movement of the sandwiching position in the direction set by the transport state setting means should be too large. I can't. Therefore, even immediately after the conveyance state setting means sets the deep handling tendency or the shallow handling tendency, the holding position does not change so much, and the operator cannot recognize the change in the holding position.

An object of the present invention is to change the pinching position of the grain culvert to the deep handling side or the shallow handling side immediately after the deep handling tendency or the shallow handling tendency is set by the transport state setting means, so that the transport state of the grain culm becomes deep. An object is to provide a combine deep handling control device that allows an operator to recognize that the handling tendency or the shallow handling tendency is correctly set.

(D) Means for Solving the Problems The combine depth control device of the present invention is a grain culm detecting means for detecting the grain culm length of a crop, and a sandwiching position of the grain culm according to the detection result of the grain culm detecting means. When the grain culm detecting means detects an appropriate value, the holding position changing means for changing the culm position and the conveying state setting means for setting the conveying state of the culm to the threshing position to the deep handling tendency or the shallow handling tendency are provided. In the combine depth control device of the combine, wherein the clamping position changing means is operated in the direction set by the conveying state setting means at predetermined time intervals by the first set time, the clamping position changing means is enabled when the conveying state setting means is enabled. It is characterized in that an immediate change means is provided for operating immediately for a second set time which is longer than the first set time.

(E) Action In the present invention, when the carrying state setting means sets the carrying state to the deep handling tendency or the shallow handling tendency, the clamping position changing means immediately operates by the immediate changing means. The operation time of the holding position changing means at this time is set to a second set time longer than the first set time set as the operation time in the normal depth control. Therefore, at the same time when the operator performs the setting operation of the carrying state by the carrying state setting means, the sandwiching position of the grain culms is relatively changed in the setting direction.

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

The combine 11 travels in the farmland by the rotation of the crawler 15, and the harvesting section 12 harvests the crop from the plant base. Reaper
Crops of crops harvested in 12 are transported chains 1,8
Is guided to the threshing device 14. This threshing device 14 has the same structure as the threshing device shown in FIG. 7 described in the prior art. Further, a control unit 13 is provided in front of the upper surface of the combine 11. The control unit 13 is provided with a steering lever 16 and a setting switch SW1 described later.

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

On / off data of the tip sensors SE1 and SE2 provided inside the cutting unit 12 is input to the CPU 31 via the I / O interface 34. The tip sensors SE1 and SE2 correspond to the grain culm detecting means of the present invention. Further, the status of the setting switch SW1 provided in the control unit 13 is input to the CPU 31. The setting switch SW1 is the carrying state setting means of the present invention,
By operating in the arrow E or F direction from the neutral position, it is possible to set the transportation state of the grain culms to the threshing device 14 to the deep handling tendency or the shallow handling tendency.

The mounting positions of the tip sensors SE1 and SE2 coincide with the upper part near the rear end of the transport chain 1. The transport 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 transport chain 1 via the link 6. The rotation of the motor M1 which is the clamping position changing means of the present invention is transmitted to the lever 5 through the changing device 3 and the shaft 4. Therefore, when the motor M1 rotates in the arrow C or D direction, the lever 5 also rotates in the arrow C or D direction. The rotation of the lever 5 in the arrow C or D direction is transmitted to the transport chain 1 via the link 6, and the transport chain 1 swings in the arrow A or B direction. When the carrier chain 1 swings in the direction of arrow A, the grain culms 40 in the carrier chain 1
The gripping position of moves to the upper side, and the state of conveyance to the threshing device 14 tends to be handled shallowly. On the contrary, when the motor 1 rotates in the direction of arrow D and the transport chain 1 swings in the direction of arrow B, the nipping position of the grain culm 40 in the transport chain 1 moves downward, and the grain culm is conveyed to the threshing device 14 in the following state. Change to deep treatment tendency.

The CPU 31 executes processing according to a program written in advance in the ROM 32, and outputs control data to the motor driver 35 based on the data from the tip sensors SE1 and SE2 and the setting switch SW1. The motor driver 35 drives the motor M1 according to this control data. Further, as shown in FIG. 3, the memory areas MA1 to M of the RAM 33 connected to the CPU 31 are connected.
Each of A3 is assigned to timer T1, timer T2 and counter C.

FIG. 4 and FIG. 5 are flowcharts showing the processing procedure of the combine handling depth control device.

When the cutting operation is started, the CPU 31 checks the on / off state of the tip sensors SE1 and SE2 (n1, n2). If the lower tip sensor SE1 is not turned on, it is determined that the length of the grain culm being conveyed is too short, and the motor M1 is rotated in the direction of arrow D (n3). As a result, the transport chain 1 swings in the direction of arrow B, and the transport state to the threshing device 14 changes to the deep handling side.

When both the tip sensors SE1 and SE2 are turned on, it is determined that the grain culm is too long, the motor M1 is rotated in the direction of arrow C (n4), and the transport chain 1 is moved in the direction of arrow A. . As a result, the pinching position of the grain culm moves to the upper side, and the transport state for the threshing device 14 changes to the shallow handling side. More than n
At 3, n4, the motor M1 is continuously driven for a driving time S1 described later. This drive time S1 is the first set time of the present invention. When the tip of the grain culm is located between the lower tip sensor SE1 and the upper tip sensor SE2, it is determined that the length of the grain culm is appropriate and whether the switch SW1 is turned on or not. Check (n5). Setting switch SW
When 1 is turned off and the operator has instructed to convey the grain stalk in the neutral state, the timer T1 assigned to the memory area MA1 is turned off and the process returns to n1 (n9). If the setting switch SW1 is not turned on as described above, n
The process of 1 → n2 → n5 → n9 → n1 is repeated and the tip sensor S
The motor M1 is driven only based on the on / off state of E1 and SE2.

When the setting switch SW1 is turned on with the tip located in the middle of the tip sensors SE1 and SE2, it is checked whether the timer T1 has timed out (n6) and this timer T1 has timed up. Setting switch SW
The motor M1 is driven to the deep handling side or the shallow handling side according to the operation state of 1 (n7), and the timer T1 is cleared (n8). n6
If the timer T1 has not timed out at
Return to. Therefore, when the setting switch SW1 is operated to the deep side or the shallow side, the process of n1 → n2 → n5 → n6 → n1 waits for the timer T1 to time up, and the timer T1
Output to the motor M1 on the deep or shallow side every time the time is up. The time counted by the timer T1 is the time S4 shown in FIG. 6, which is usually about 2 to 3 seconds.

If the switch SW1 is operated during the processing of n1 → n2 → n5 → n9 → n1, the interrupt processing shown in FIG. 5 is executed. That is, when the switch SW1 is operated to the deep side, the motor M1 is driven in the direction of arrow D for the time S1 shown in FIG. 6 (n11 → n12). This time S1 is the second set time of the present invention, which is approximately twice the driving time S3 at n7,
The movement amount of the transport chain 1 in the arrow B direction is approximately doubled.
When the setting switch SW1 is operated to the shallow handling side, the motor M1 is moved in the direction of arrow C (n11 → n13). The driving time to the shallow handling side is also the time S1 shown in FIG. After the motor M1 is driven at n12 or n13, the timer T2 is turned on (n14). This timer T2 is the time S2 shown in FIG.
Time. Wait for the timer T2 to time out, and then return to the main routine (n15).

In the above processing, n11 to n13 together with the timer T1 assigned to the memory area MA1 correspond to the immediate changing means of the present invention. As described above, when the setting switch SW1 is operated from the neutral state (OFF) to the deep handling tendency or the shallow handling tendency during the reaping work, the motor M1 is immediately moved to the deep handling side for a relatively long time (time S1). Or it is driven to the shallow side. As a result, the operator can operate the motor that is the clamping position changing means.
You can check the execution of M1. After this, after the passage of time S2, time
The motor 1 is driven at a duty ratio of S3 / time S4. The driving time S3 at this time is a time in which the tip in the neutral state does not exceed SE2 of the upper sensor or lower than the lower sensor SE1 even if it is output a plurality of times every time (S3 + S4). Therefore, according to this embodiment, the threshing device 14
Immediately when the state of conveyance of crops to the state from the neutral state to the deep handling tendency or the shallow handling tendency is changed, the grain culm clamping position is changed to a relatively large amount, and thereafter the grain culm is clamped in small time intervals at regular time intervals. The position can be changed to the deep side or the shallow side.

(G) Effect of the Invention According to the present invention, when the transportation state of the grain culm is set to the deep handling tendency or the shallow handling tendency by the transportation state setting means,
The holding position of the grain culm is immediately changed by the immediate changing means. Therefore, the operator can easily confirm that the transport state setting means and the clamping position changing means have operated effectively.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of a combine handling depth control device according to an embodiment of the present invention, FIG. 2 is an external view of a combine having the handling depth control device, and FIG. A memory map of a main part of a RAM forming a part of the apparatus, FIGS. 4 and 5 are flowcharts showing a processing procedure of the handling depth control apparatus, and FIG. 6 is a conveyance state setting means in the handling depth control apparatus. 7 is a timing chart showing an operating state with the holding position changing means. FIG. 7 is a schematic side cross-sectional view showing the configuration of a threshing device mounted on a general combine including the embodiment of the present invention. 1 ... Transport chain, 14 ... Threshing device, M1 ... Motor, SE1, SE2 ... Tip sensor, SW1 ... Setting switch.

Claims (1)

[Claims] 1. A grain culm detecting means for detecting a grain culm length of a crop, a clamping position changing means for changing a clamping position of the grain culm according to a detection result of the grain culm detecting means, and a conveying state of the grain culm to a threshing device. Is set to a deep handling tendency or a shallow handling tendency, and a pinching position changing means is set in a direction set by the carrying state setting means when the grain culm detecting means detects an appropriate value. In a combine handling depth control device that operates at first intervals for a first set time, the holding position changing means is immediately operated for a second setting time longer than the first setting time when the transport state setting means is enabled. A combine handling depth control device provided with an immediate changing means.