JPH055847Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention connects a reaping pretreatment section to the front part of a traveling machine so that it can be driven up and down, and an ultrasonic reference surface is attached to the reaping pretreatment section. The present invention relates to a reaping harvester equipped with a control device that is provided with a vertical height detection sensor and controls the elevation of the pre-reaping processing section based on the detection result of the sensor so as to maintain the vertical height relative to a reference plane set by a setting device.

[Conventional technology]

Conventionally, in normal cutting height control in a reaping and harvesting machine with the above configuration, the reaping device measures the above-ground part of the grain culm at a set height while detecting the vertical height from the soil surface using the soil surface of the field as a reference plane. It was set to disconnect. Therefore, the lower limit of the set height of the reaping device from the ground is the position where it almost touches the ground;
As a result, the following problems arose.

[The problem that the idea aims to solve]

When harvesting in fields that are constantly flooded with water, such as rain-fed fields, the grain culm is cut under the water to maintain the optimum grain length for threshing, and when harvesting crops such as reeds, water hyacinth, aquatic plants, etc. When reaping, if it is absolutely necessary to cut below the water surface, the surface that reflects the ultrasonic waves as a reference for the height detection sensor will be the water surface, and the water surface will be higher than the level of the reaping device. There was a problem in which harvesting operations could not be performed while maintaining a constant distance between the reaping device and the water surface with the water surface as a reference.

The present invention was developed with this point in mind, and unlike the so-called normal cutting height control, the setting reference plane can be set not only on the lower side of the reaping device but also on the upper side, and this standard The purpose is to enable vertical adjustment control of the reaping position for the surface.

[Means to solve the problem]

A characteristic configuration of the present invention is that in the reaping harvester described at the beginning, the ultrasonic type vertical height detection sensor relative to the reference surface is disposed at a higher position than the reaping device in the reaping pre-processing section, and the above-mentioned setting The setting distance of the detection sensor to the detection reflection surface, which can be set and changed by a device, can be freely set to be smaller than the vertical distance between the detection sensor and the reaping height position of the reaping device. There is, and its actions and effects are as follows.

[Effect]

Even when reaping work is performed with the reaping device located underwater, the detection sensor installed higher than the reaping device can be positioned higher than the water surface, allowing the setting device to reach the detection reflection surface. By setting the set distance to be smaller than the vertical interval between the detection sensor and the reaping height position of the reaping device, and controlling the distance between the detection sensor and the water surface to be maintained constant, the reaping device and The detection sensor moves up and down integrally with the reaping pre-processing section, so even if the traveling machine running on the bottom moves up and down due to the unevenness of the bottom, it will not be possible to harvest against the water surface regardless of the vertical movement of the traveling machine. By controlling the relative heights of the sections, the distance from the cutting height position of the cutting device to the water surface can be controlled to be maintained substantially constant.

[Effect of idea]

By using an ultrasonic sensor for detecting vertical height relative to a reference surface, height detection can be performed effectively even when the detection reflective surface is on the water surface, and the reaping height position of the reaping device can be adjusted from the water surface with the water surface as a reference. It is now possible to perform reaping work while automatically moving up and down underwater so that the distance between the two is almost constant.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

As shown in FIG. 1, a reaping pretreatment section A is attached to the front part of a crawler traveling vehicle body 2 mounted on a threshing device 1 so as to be movable up and down by a hydraulic cylinder 3, thereby configuring a combine harvester.

The reaping pre-processing section A includes a weeding tool 4 that separates and guides grain culms to the left and right, a pulling device 5 behind this, a clipper type reaping device 6 that cuts off the base of the grain culms, and a threshing device 1 for removing the harvested grain culms. Detection results of an ultrasonic vertical height detection sensor 9 relative to a reference surface, which is constituted by a conveying device 8 that supplies the feed chain 7 of Based on this, the pre-reaping processing section A is maintained at the vertical height relative to the reference plane set by the setting device 11.

As shown in FIGS. 1 and 2, the sensor 9
consists of a transmitter 9a that emits ultrasonic waves intermittently and a receiver 9b that receives reflected waves from a reference surface such as the ground surface or water surface, and the sensor 9 detects the time from transmission to reception. The signal is input to the control calculation device 10 as a detection signal of the distance to the reflecting surface. Further, the control calculation device 10 drives the hydraulic cylinder 3 by switching and controlling the electromagnetically operated control valve 12 so that the value set by the setting device 11 and the input signal almost match, and controls the reaping pre-processing section. A is maintained at the set height.

The detection sensor 9 is disposed at a higher position than the reaping device 6 in the reaping pre-processing section A, and
The setting distance of the detection sensor 9 to the detection reflection surface, which can be set by the setting device 11, can be freely set to be smaller than the vertical distance between the detection sensor 9 and the reaping height position of the reaping device 6. . In other words, when harvesting is carried out in a field that is constantly flooded with water, such as a rain-fed field, or in a field where the ground is submerged due to heavy rain just before harvest, the distance from the detection sensor 9 to the water surface is determined based on the water surface. By controlling to maintain the set value, as a result, the reaping device 6 is removed from the water surface.
The structure is such that the grain culm can be harvested underwater while maintaining a constant distance to the reaping height position.

The reason why the detection sensor 9 is provided on the right side of the machine is that when the detection sensor 9 functions with the water surface as a reference, the water surface on the harvested side has less floating dust and straw debris than the water surface on the uncut side, and the ultrasonic wave This is because the attenuation of is small.

In this embodiment, the reaping pretreatment section of the combine harvester is configured to be automatically raised and lowered, but the present invention may be applied to a reaping harvester for harvesting reeds, water hyacinth, etc. instead.

[Brief explanation of the drawing]

The drawings show an embodiment of the reaping harvester according to the present invention, with FIG. 1 being a side view of the front part of the combine, and FIG. 2 being a schematic diagram showing the drive control circuit of the pre-reaping processing section. 2... Traveling vehicle body, 6... Reaping device, 9... Detection sensor, 11... Setting device, A... Reaping pre-processing section.

Claims (1)

[Scope of utility model registration request] A reaping pre-processing section A is connected to the front part of the traveling machine body 2 so as to be movable up and down, and an ultrasonic type vertical height detection sensor 9 relative to a reference surface is provided in the reaping pre-processing section A, and the detection results of this sensor 9 are The reaping/harvesting machine is equipped with a control device that controls the elevation of the reaping pre-processing section A to maintain the vertical height relative to the reference surface set by the setting device 11 based on the above-mentioned ultrasonic type vertical height relative to the reference surface. The height detection sensor 9 is connected to the reaping pre-processing section A.
The setting distance to the detection reflective surface of the detection sensor 9, which is disposed at a higher position than the reaping device 6 and whose setting can be changed by the setting device 11, is determined by the reaping height of the detection sensor 9 and the reaping device 6. A reaping harvester that can be freely configured to be smaller than the vertical distance between the positions.