JP2813708B2 - Ground height detection structure of reaper and harvester - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a harvester for harvesting crops such as rice, barley, and soybeans.

[0002]

2. Description of the Related Art In general, in a harvester such as a combine harvester, a lifting control device for raising and lowering a cutting pretreatment device to a fixed height above the ground so that the cutting height does not become uneven due to unevenness of the ground, or And a rolling control device for controlling the pre-cutting device in a horizontal position regardless of the lateral inclination of the machine.

Conventionally, a grounding sensor for raising and lowering control and a grounding sensor for rolling control of a pre-cutting device have been disclosed in Japanese Unexamined Utility Model Publication No.
As disclosed in Japanese Patent No. 0314 or JP-A-63-207311, the rear end of the grounding sensor is folded upward so that the sensor does not scoop up the soil when the body is backed up. There is a song.

[0004]

If the rear end of the ground sensor is bent upward as a means for preventing the mud from being scooped by the sensor, there is a disadvantage that the swing amount of the ground sensor is reduced. Is urged downward so as to follow the ground, so a gap is inevitably created between the rear edge of the sensor and the lower surface of the pre-cutting device, and the intrusion of mud cannot be completely prevented. It has become.

An object of the present invention is to solve the above-mentioned disadvantages.

[0006]

In order to achieve the above object, the present invention is characterized in that a rear closing plate rotatable around a horizontal axis is mounted on a rear end of a grounding sensor. The plate is urged upward so that the trailing edge contacts the lower surface of the pre-cutting device.

[0007]

As shown in FIG. 1, the rear closing plate 12 has its rear edge 12a
Since it moves in the front-rear direction while being in contact with the lower surface of the pre-cutting device 4, the sensor S does not scoop the soil when the aircraft is backed. Further, the sensor S is not hindered from swinging upward by the rear blocking plate 12, and the sensing operation range of the sensor S is widened.

When the rear closing plate 12 slidingly contacting the lower surface of the pre-cutting device 4 comes into contact with, for example, an embankment at the time of backing of the machine body, the rear edge 12a of the rear closing plate 12 is moved.
Escapes upward while sliding on the lower surface of the sensor S.
There is no intrusion of soil into the area.

[0009]

As a result of the above configuration, it is possible to suppress malfunction of the sensor due to scooping of soil with the sensor,
In addition, the automatic cutting height performance can be enhanced by the operation of the wide sensing range.

[0010]

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

FIG. 3 shows a combine with all culms as a reaper harvester for harvesting crops such as soybeans and buckwheat. In this combine, a threshing device 3 is mounted on a machine frame 2 having a pair of right and left crawler traveling devices 1. A cutting pre-processing device 4 which is mounted and driven up and down around a horizontal axis P by a hydraulic cylinder C is connected to a front portion of the body.

The pre-cutting treatment device 4 includes a rotary reel 5 for scraping the tip side of the planted grain culm to the machine body side, a clipper-type reaper 6 for cutting the stock side of the grain culm scraped to the machine body side, An auger 7 for gathering the harvested grain culm to one side of the machine body, and a feed conveyor 8 for conveying the gathered grain culm toward the rear threshing device 3.

The pair of left and right crawler traveling devices 1 are independently controlled by a control device (not shown) based on the detection results of a pair of left and right ground sensors S provided below the pre-cutting device 4. The cutting pre-processing device 4 is controlled to a horizontal attitude to the ground even if the heights of the left and right ridges are different.

In the pair of left and right crawler traveling devices 1, a track frame 1A supporting the rolling wheels 1a is supported by a pair of front and rear bell cranks 9a, 9b so as to be vertically movable, and the two bell cranks 9a, 9b are connected to each other. Linked by a link 9c, the two bell cranks 9a, 9b are connected to the hydraulic cylinder 1
The crawler ground contact portion is configured to be moved up and down relative to the machine body frame 2 by performing a swing operation through the “0”.

As shown in FIG. 1, the ground sensor S
The front end side is pivotally connected to the lower surface of the mowing pre-processing device 4, and the rear end side is connected to a potentiometer M via a link mechanism R, so that the vertical swing amount of the sensor is detected as the link swing amount. It has become.

The link mechanism R is urged downward through a spring 11 so that the ground sensor S follows the ground, and a horizontal axis X is attached to the rear end of the ground sensor S.
A rear blocking plate 12 that is rotatable around is mounted.

The rear closing plate 12 is urged upward by a spring 13 so that a rear edge 12a thereof comes into contact with the lower surface of the pre-cutting device 4. The rear end of the plate 12 is moved in accordance with the vertical movement of the sensor S. The edge 12a moves in the front-rear direction while being in contact with the lower surface of the pre-cutting device 4.

The rear closing plate 12 has a rear end formed in a protruding shape which is sandwiched between a central portion provided on the lower surface of the pre-cutting device 4 and reinforcing frames 4a, 4b on both sides. The displacement of the sensor S in the left-right direction is controlled by the rear closing plate 12 and the reinforcing frame 4a.
4b.

[Alternative Embodiment] In the above-described embodiment, the grounding sensor for rolling control for controlling the mowing pre-processing device in a horizontal posture regardless of the lateral inclination of the machine has been exemplified, but the mowing height is kept constant. It may be a ground sensor for controlling the elevation of the pre-cutting device.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is a side view showing an operation state of a sensor.

FIG. 2 is a longitudinal sectional view showing a mounting structure of a sensor.

FIG. 3 is a schematic side view of the entire combine.

[Explanation of symbols]

 4 Cutting Pretreatment Device 12 Rear Blocking Plate 12a Rear Edge S Ground Sensor X Horizontal Axis

Continuation of the front page (56) References JP-A-61-74512 (JP, A) JP-A-63-207311 (JP, A) JP-A-2-96810 (JP, U) JP-A-4-80314 (JP) , U) (58) Field surveyed (Int. Cl. ⁶ , DB name) A01D 34/02-34/40

Claims (1)

(57) [Claims] 1. A ground height detecting structure for a harvesting and harvesting machine, wherein a ground sensor (S) which can swing vertically is provided at a lower portion of a pre-cutting device (4). At the end, a rear blocking plate (12) rotatable around the horizontal axis (X) is mounted, and the plate (12) is mounted.
Of the reaper and harvester, wherein the rear end edge (12a) of the reaper and harvester is biased upward such that the rear edge (12a) comes into contact with the lower surface of the pre-cutting device (4).