JPH0432918Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to an automatic handling depth control device for a combine harvester that reaps and threshes grain culms.

(b) Prior art Conventionally, a grain head-side detection device for detecting the presence or absence of a grain culm and an ear tip detection device for detecting the ear tip position behind it were installed in the grain culm passage, and the initial detection signals from these detection devices were delayed. The automatic handling depth adjustment device for combine harvesters that emitted light via a circuit was developed in 1973.
This is already known from the publication No.-40995.

(c) Problems to be solved by the invention In the known invention, when the reaping and threshing operation is first started, only the detection device on the stock head side enters the detection state and the handling depth adjustment device operates to adjust the depth of grain handling. can be prevented.

However, when reaping is interrupted to rotate the machine during reaping and threshing work, grain culms tend to be transported with the ears leading the way, and in this case too, the deep handling is adjusted, and the grain culms that have been harvested in multiple rows are moved from one side to the other. In a combine harvester that transports the grains together along the transport route, the grain culms on the other side are delayed in reaching the detection position, as shown in Figure 2, so the layer of grain culms becomes thinner at the end of mowing, and the sensor responsiveness decreases. The sensor enters a non-detection state and is subjected to deep handling adjustment, and such a phenomenon cannot be resolved by the above-mentioned known method.

Further, by setting the plant head side detection device sufficiently ahead of the tip detection device and providing the above-mentioned delay circuit, the depth of handling at the end of mowing can be made appropriate.

However, with this method, at the start of mowing, the time required for grain culms to pass between the stock side detection device and the ear detection device differs depending on the size of the reaping travel speed, and if the timer value is set short, the travel speed increases. If this is the case, the deep handling is adjusted, and conversely, if it is set to a long length, problems such as grain culm whose culm length is not detected are supplied to the threshing device when the traveling speed is low will occur. This requires a complicated control device that changes the timer value in conjunction with the vehicle speed.

Furthermore, the problems of the above-mentioned known devices can be solved by providing the plant-side detection device and the ear tip detection device in a straight line so that both detection devices detect the same grain culm substantially at the same time. However, a problem arises in that at the end of cutting, if the tip side is ahead of the grain or if the grain culm layer becomes thin, the depth of the grain must be adjusted.

(d) Means for solving the problems The present invention provides a combine harvester that is equipped with a stock side detection device for detecting the presence or absence of grain culms and a head sensor, and the handling depth is automatically controlled based on the detection results of the head sensor. As shown in FIG.
By disabling the detection signal of the second tip detection device and forcibly adjusting the shallow handling, the deep handling at the end of the previous cutting process can be corrected within a short time at the start of the next cutting process to achieve an appropriate handling depth. The above-mentioned problems can be solved by adjusting the height.

However, since the operator arbitrarily adjusts the handling depth adjustment device when starting work, if the above-mentioned forced shallow handling adjustment is performed, the initial handling depth will be inappropriate.

In addition, if a problem such as clogging occurs in the threshing equipment or other equipment and the grain culm conveyance equipment stops with the grain culm caught, stop the engine, resolve the problem, and then restart work. When the automatic handling depth switch is turned on, the grain culm is held between the grain culm conveying devices, and when the forcible shallow handling adjustment is performed in this state, the grain culms held between the grain culm conveying devices become stock. This causes the grain to be pulled out to the original side, which places an overload on the drive section of the handling depth adjustment device and damages the grain culm.

This problem was solved by disabling the forced shallow handling adjustment when the plant side detection device detects the grain culm when the power is turned on.

(e) Operation The plant head side detection device detects the presence or absence of grain culms that are harvested by the reaping device and transported to the threshing device, and the ear tip detection device detects the ear tip position.

When one stroke of reaping is completed and the next stage begins, the tip of the ear is transported first at the end of the harvest, and in the case of multi-row mowing, only one row is transported, so both detection devices are placed in a straight line. Even if it is provided, the handling depth adjustment device will operate at a deep handling depth.

After completing the rotation of the machine and entering the next reaping process, the initial detection signal is invalidated, and for a short period of time, the shallow handling is adjusted, and then normal culm length detection is performed based on the detection result of the tip detection device. The handling depth is adjusted by the detection signal.

At the start of work, the operator first sets the handling depth to an arbitrary level and reaps, but at that time, the forcible shallow handling adjustment that is performed at the beginning of reaping is not performed, and during work, the operator does not use the threshing device or When a problem occurs in the grain culm conveying device, etc., and the engine is stopped to resolve the problem, and the automatic handling depth switch is turned on after the trouble is resolved, the stock side detection device and the ear tip detection device detect the grain culm. Although grain culms caught in the conveyance device are detected, this detection signal is invalidated and the forcible shallow handling adjustment is not performed.

(F) Example An example of the present invention will be explained with reference to the drawings.
Reference numeral 1 denotes a threshing device mounted on one side of a machine base having a traveling device, and on the other side, an operation panel 2, a lever panel 3, a driver's seat 4, a grain tank 5, an engine, etc. are arranged in order from the front. The front part of the threshing device 1 includes a reaping device 6, and a grain culm conveying device composed of a stock head conveyor 7 and a ear side conveyor that tilt in the direction of the culm of the grain culm to be conveyed. A pretreatment device is provided.

In addition, an automatic handling depth switch 8 provided on the operation panel 2 is provided opposite to the travel pedal 9, and is turned on when depressed.
The reaping clutch switch 1 is installed opposite to the reaping clutch lever 11 of the lever panel 3 and turns on when the pretreatment clutch is engaged.
2. A handling depth main sensor MS that is attached near the starting end of the stock source conveyor 7 and constitutes a stock side detection device; Detection signals from the handling depth sensors HS, LS of the tip detection device that detect the appropriate position range, the shallow handling side limit switch 13, and the deep handling side limit switch 14 are input to the microcomputer 15, and the output of the handling depth sensor HS, LS is input to the microcomputer 15, and the output of the handling depth sensor HS, LS of the tip detection device is inputted to the microcomputer 15, and the output of the handling depth sensor HS, LS, the shallow handling side limit switch 13, and the deep handling side limit switch 14 is inputted to the microcomputer 15. The tilting motor 16 stops.

Next, the operation will be explained with reference to FIGS. 4 and 5. At the start of work, the operator turns on the automatic handling depth switch 8 at position A in the field, sets the handling depth arbitrarily, and starts reaping.

Then, the harvested grain culm is handled by the main sensor MS.
Even if only the main handling depth sensor MS and the handling depth sensors MS and LS are turned ON, both the main handling depth sensor MS and the handling depth sensors MS and LS are turned ON.
These detection signals are ignored even when
The motor 16 is not forced to rotate to the side where shallow handling is adjusted.

Then, in order to move on to the next reaping process after finishing one reaping process, the reaping process is interrupted, the machine is rotated at position B in Fig. 4, and the automatic handling depth switch 8 is turned on.
When the machine is turned on, the travel clutch, and the reaping clutch are engaged to start reaping, the control circuit is reset.
The harvested grain culm is transferred to a grain culm conveying device and transported.

Then, the stock base of the grain culm being transported is detected by the handling depth main sensor MS, and at this time, if the ear side has not reached the handling depth sensor HS or LS, a deep handling signal is emitted. However, the detection signal at t is invalid for a very short period of time until the grain culm reaches the ear tip detection device from the handling depth main sensor MS, and at that time, the shallow handling side limit switch 13 is activated.
If it is OFF, the motor 16 operates to move the stock carrier 7 toward the shallow handling side as shown in Fig. 3 by the inching output from the microcomputer 15 (the number of inching is 1 to 3, 2 in this example), and at the end of the previous stroke, Correct the situation that has been treated too seriously. From now on, the handling depth sensor
Shallow treatment or deep treatment is adjusted according to the detection signals of HS and LS.

When trouble such as clogging occurs in the threshing device 1 or the grain culm conveying device during work, the machine is stopped and the engine is also stopped to eliminate the trouble.

After that, when the automatic handling depth switch 8 is turned on to restart the reaping and threshing work, since the grain culm is held in the grain culm conveying device, the handling depth main sensor
Although the MS and at least the handling depth sensor LS enter the detection state, this detection signal is ignored as shown in FIG. 5, and the forcible shallow handling adjustment is not performed. The culm is never pulled out.

(g) Effects of the invention As mentioned above, the present invention is equipped with a plant side detection device and a tip detection device for detecting the presence or absence of grain culms, and automatically controls the handling depth based on the detection results of the tip detection device. In a combine harvester, the detection signal of the tip detection device is disabled for t seconds immediately after the grain culm transferred at the start of mowing is detected by the stock detection device, and the grain handling is forcibly adjusted. When the power is turned on, the stock detection device is activated. When grain culms are detected, the forced shallow handling adjustment is disabled, so when the machine rotates during work, deep handling is adjusted at the beginning and end of mowing, but the forced shallow handling adjustment at the beginning of mowing is disabled. It is possible to adjust the handling depth to bring it close to the appropriate handling depth, and if a problem such as clogging occurs in the threshing device or grain culm conveying device during work, the engine can be stopped to eliminate the problem. Then, when the automatic handling depth switch 8 is turned on to resume work, the forcible shallow handling adjustment is not performed, so the grain culms held between the grain culm conveying devices are not pulled out, and the transmission device is not pulled out. Breakage and damage to grain culms can be prevented.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention,
Fig. 1 is a plan view showing the relationship between various sensors and a microcomputer, Fig. 2 is a plan view showing the state of the multi-row combine harvester during and at the end of cutting, Fig. 3 is a time chart, and Fig. 4 is a plan view showing the relationship between various sensors and a microcomputer. FIG. 5 is a plan view showing the work order, FIG. 5 is a flowchart, and FIG. 6 is a flowchart of the forced shallow handling method. 7...stock source conveyor, 8...automatic handling depth switch,
MS... Main sensor for handling depth, HS, LS... Depth sensor, 16... Motor.

Claims (1)

[Scope of utility model registration request] In a combine harvester that is equipped with a stock side detection device and a tip detection device to detect the presence or absence of grain culms, and the handling depth is automatically controlled based on the detection result of the tip detection device, the grain culms transferred at the beginning of mowing are The detection signal of the ear tip detection device is disabled for t seconds immediately after detection by the base side detection device, and the forced shallow handling is adjusted. An automatic handling depth control device characterized by overriding adjustment.