JPS6216606B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a device for detecting the culm length of a grain culm pulled up by a pulling device that is driven at a constant speed regardless of fluctuations in the traveling speed of the aircraft, and based on the result of this culm length detection. The present invention relates to a combine harvester equipped with an automatic handling depth control mechanism that automatically operates a handling depth adjustment device to an appropriate handling depth adjustment value set by the operator.

If the handling depth adjustment device is automatically operated to the appropriate state set based on the culm length detection result, it is convenient because the handling depth can be stabilized without requiring any special operation, and If the hoisting device is driven at a constant speed, there will be problems such as straining and damaging the grain culm if the hoisting device is driven too fast, or mistakes in hoisting if the hoisting device is driven too slowly. However, there is a problem in that driving the lifting device at a constant speed has a negative effect on automatic handling depth control.

In other words, if the machine running speed is changed for a hoisting device that is driven at a constant speed, the posture of the grain culm that is hoisted by the hoisting device and harvested will change to a forward or backward posture. Therefore, even for grain culms with the same culm length, the detected value of the culm length detection device tends to change. (This tendency varies depending on the model, but
Normally, the lower the traveling speed, the more likely the culm will be detected as a short culm. ) At the start of reaping work, the travel speed is set to be sufficiently slower than the travel speed during normal reaping work, for example, for row alignment, etc. The traveling speed at the time of starting reaping may differ, and the value detected by the culm length detection device will vary greatly between the time of normal reaping work and the time of starting reaping work, even for grain culms with the same culm length.
As a result, if you start reaping work with the handling depth adjustment device maintained at the automatically controlled handling depth adjustment value during the previous reaping operation, the handling depth adjustment device will suddenly make a large adjustment at the same time as the reaping operation starts. It may be activated over a wide range, and the posture of the grain culm that is raised and harvested tends to be unstable at the start of reaping compared to during normal reaping work, resulting in errors in grain culm inheritance. There is a risk that transportation troubles such as There was also the risk that a situation would arise.

The present invention aims to solve the above-mentioned problems and to enable good control of the handling depth even from the start of reaping.

Embodiments of the present invention will be described in detail below with reference to illustrative drawings.

FIG. 1 shows a side view of the front part of the combine harvester, and the front part of the combine machine is composed of a crawler traveling device 1, a threshing device 2, and a device 3 for raising the planted grain culm into an upright position.
An auxiliary conveyance device 4 that scrapes the base of the grain culm rearward, a reaping device 5 that cuts the base of the grain culm, a harvested grain culm that is held between the base of the grain culm and the ear tip latched, is conveyed rearward, and is laterally removed at the end of the conveyance. A reaping pre-processing section is equipped, which includes a rear conveyance device 7, etc., which changes the state of the grain to a reclined position and delivers it to the feed chain 6 of the threshing device 2.

The rear conveyance device 7 is configured to be vertically oscillated by the forward and reverse operation of an electric motor 8, which will be described later, with its rear end as a fulcrum P, and the vertical oscillation changes the support position for the harvested grain culm in the culm length direction. It is configured as a so-called handling depth adjustment device that changes the handling depth state in the threshing device 2 by changing the threshing depth.

The various devices 3 of the reaping pre-processing section are configured to be driven at a constant speed at all times, and the speed of the crawler traveling device 1 is changed by swinging the traveling speed change lever 9 back and forth (see FIG. 3). It is structured as follows. That is, the shift lever 9 is configured such that the more it is operated forward from the neutral position N, the faster the vehicle will move forward, and the more the shift lever 9 is operated backwards from the neutral position N, the faster the vehicle will move backwards.

Next, the automatic handling depth control mechanism will be explained.

That is, three electric culm length sensors 10a, 10b, and 10c are installed on the back of the pulling device 3, which are operated by pressing against the grain culm tips along the vertical direction, so that the grain culm tips are closer to the upper sensor 10a. is also above, between the upper sensor 10a and the middle sensor 10b, and the middle sensor 10b
The culm length detection device 10 is configured to detect culm length in four stages: a state between the lower sensor 10c and a state below the lower sensor 10c.

A potentiometer 11 is attached to the fulcrum P of the rear conveyance device 7.
It is configured to detect the actual rocking position, that is, the actual handling depth state.

As shown in the block diagram of FIG. 2, a circuit 12 is provided for determining the culm length based on the detection results of the culm length detection sensors 10a, 10b, and 10c, and the culm length determination result from the determination circuit 12 and the potentiometer The motor 8 is configured to be operated in the forward and reverse directions so that the detection value of the potentiometer 11 is compared and determined in the control circuit 13, and the culm length determination result and the detection value of the potentiometer 11 maintain a preset balanced relationship. There is. Therefore, when the culm length of the raised grain culm changes, the motor 8 is activated based on this, and the rear conveyance device 7 is automatically swung up and down, so that the handling depth is maintained at an appropriate level. It's summery.

The machine is also equipped with an automatic handling depth correction device that automatically adjusts the handling depth when the machine is in a non-reaping state.

That is, as shown in FIG. 3, four electric switches 13a, 13b, 13
c and 13d are arranged in parallel, and each switch 13a
The forward speed change state is configured to be detected in four stages depending on which switch among the switches is pressed.

An electric culm presence/absence detection sensor 14 that is operated by pressing on the base of the grain culm is equipped below the back of the lifting device 3 as a device for detecting whether the machine is in a reaping work state or a non-reaping work state. has been done.

As shown in FIG. 2, based on the detection results of the switches 13a and the culm absence detection results of the culm presence/absence detection sensor 14, the deviation between the machine running speed during the previous reaping operation and the current running speed is determined. The deviation value from this discrimination circuit 15 and the detection result of the culm detection sensor 14 are input to the control circuit 13. The automatic handling depth control mechanism is configured to operate only in a reaping work state in which the culm detection sensor 14 detects the presence of a grain culm, and in a non-reaping work state in which the culm detection sensor 14 detects the absence of a grain culm. A handling depth adjustment value that is calculated and set based on a handling depth adjustment value that is automatically set based on the operating status of the automatic handling depth control mechanism in the previous reaping work state and a traveling speed deviation value from the discrimination circuit 15. The rear conveyance device 7 is configured to automatically swing up and down so that That is, the final swing position of the rear conveyance device 7 is set as the automatic setting value, and the motor 8 is operated based on the fluctuation of the traveling speed deviation value to move the rear transport device 7 to the final swing position. It is configured to automatically operate in a state in which it is swung downward from the moving position as the traveling speed becomes lower. Note that the amount of swing of the rear transport device 7 with respect to the unit deviation amount of the traveling speed is set in advance according to changes in specifications for each model.

Therefore, when one stroke of reaping work is completed, the rear conveyance device 7 is automatically swung from the final swiveling position in the previous reaping state based on the fluctuation of the actual traveling speed. Even if the traveling speed at the time of entering the next stroke and starting the reaping work is different from the traveling speed at the time of the previous reaping work, it is assumed that the rear conveyance device 7 has not been shaken significantly. It's summery.

Reference numeral 16 in the figure is a setting device that changes and sets the set swing position of the rear conveyance device 7 corresponding to the detection result of the culm length detection device 10, and by changing and adjusting this setting device 16, It is possible to correct for fluctuations in the culm length detection results for grain culms of the same culm length due to fluctuations in traveling speed during the reaping operation, and also for fluctuations in the amount of this fluctuation due to fluctuations in culm length. In the embodiment of the present invention, in order to facilitate the operation of the setting device 16, a setting device operating lever 16a is provided on the side of the shift lever 9, and,
On a receiving plate 17 connected to this lever 16a, lamps 18a, 18b, 18c, and 18d that display the detection result of the culm length detection device 10 in four stages are arranged side by side, and a lamp 18a that lights up according to the culm length detection result.
By swinging the lever 16a so that the lever 16a is positioned on the side of the speed change lever 9, a predetermined setting adjustment operation can be performed.

In addition, in the example, taking into consideration that the final grain culm length during the previous reaping operation and the initial grain culm length in the next process are approximately the same, the automatic handling depth during the previous reaping operation was adjusted. As the value that is automatically set based on the operating status of the cutting control mechanism, the final handling depth adjustment value from the previous cutting operation is used as is. The average value of the deepest handling adjustment value and the shallowest handling adjustment value of the depth adjusting device 7 and the adjustment value of the handling depth adjusting device 7 during the previous reaping operation are detected and stored for each unit time or unit traveling distance, An average value obtained by dividing the total sum of detected values by the number of times of memorization may be used.

Further, the present invention provides a culm length detection device 1 as in the embodiment.
0 is particularly necessary for those placed on the upper side of the conveyance system from the raising device 3 to the threshing device 2, but it may be applied to those placed on the lower side of the conveyance system.

In summary, the present invention provides a combine harvester with an automatic handling depth control mechanism having the structure described above, which includes a device for detecting whether the machine body is in a reaping work state or a non-reaping work state, and only in the reaping work state. The automatic handling depth control mechanism is configured to switch to an operating state, and in the non-reaping operation state, the automatic handling depth control mechanism is automatically set based on the operating status of the automatic handling depth control mechanism during the previous reaping operation. and an automatic handling depth that automatically operates the handling depth adjustment device based on the handling depth adjustment value calculated and set based on the deviation value between the travel speed during the previous reaping operation and the actual machine travel speed at that time. It is characterized by being equipped with a correction device.

Therefore, due to the action of the automatic handling depth adjustment device, the handling depth adjustment device is automatically corrected during non-reaping work while the machine direction is changed at the headland after one stroke of reaping work is completed. Even if the traveling speed at the start of the next reaping process after changing direction is significantly different from the traveling speed during the previous reaping operation, the handling depth adjustment device will suddenly operate over a large range as the reaping operation begins. This makes it possible to prevent the above-mentioned problem from being activated and to perform good handling depth control.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the combine harvester with an automatic handling depth control mechanism according to the present invention, in which FIG. 1 is a side view of the front part of the combine, FIG. 2 is a block diagram, and FIG. 3 is a perspective view of the lever mounting part. It is. 3... Lifting device, 7... Handling depth adjustment value, 10
... Culm length detection device, 14 ... Reaping work state detection device.

Claims (1)

[Claims] 1. A device 10 is provided for detecting the culm length of the grain culm raised by the pulling device 3 which is driven at a constant speed regardless of fluctuations in the machine running speed, and the setting is made based on the result of this culm length detection. The combine harvester is equipped with an automatic handling depth control mechanism that automatically operates the handling depth adjustment device 7 to the appropriate handling depth adjustment value, and the machine is in a reaping operation state. A device 14 for detecting whether the reaping operation is in progress is provided, and the handling depth control mechanism is switched to the operating state only in the reaping operation. The handling depth is calculated and set based on the handling depth adjustment value that is automatically set based on the operating status of the automatic handling depth control mechanism, and the deviation value between the traveling speed during the previous reaping operation and the actual machine traveling speed at that time. A combine harvester with an automatic handling depth control mechanism, characterized in that the combine harvester is equipped with an automatic handling depth correction device that automatically operates the handling depth adjustment device 7 to adjust the depth. 2. The combine harvester with an automatic handling depth control mechanism according to claim 1, wherein the automatically set handling depth adjustment value is the final adjustment value of the handling depth adjustment device 7 during the previous reaping operation. . 3. The automatically set handling depth adjustment value is an average value of the deepest handling adjustment value and the shallowest handling adjustment value of the handling depth adjustment device 7 during the previous reaping operation. A combine harvester with an automatic handling depth control mechanism as described in . 4. The automatically set handling depth adjustment value is determined by detecting and storing the adjustment value of the handling depth adjustment device 7 during the previous mowing operation for each unit time or unit traveling distance, and calculating the sum of the stored detected values. A combine harvester with an automatic handling depth control mechanism according to claim 1, which is an average value divided by the number of times of storage. 5. Claims 1 to 4, wherein the appropriate handling depth adjustment value set by the handling depth adjusting device 7 based on the culm length detection result in the automatic handling depth control mechanism is configured to be changeable and adjustable. A combine harvester with an automatic handling depth control mechanism according to any of the above.