JPS6140104Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention has a terminal end located at the rear of the machine body relative to the reaping device, and this terminal part is curved to one side in the width direction of the machine body when viewed from the front. The grain culm pulling device has a lifting path in the shape of an almost inverted dogleg. The present invention relates to a combine harvester equipped with a grain culm holding and conveying device that overlaps the terminal end of a pulling path and adjusts the handling depth of the threshing device by vertically swinging the conveyance starting end.

[Conventional technology]

The above combine harvester is, for example, Utility Model 53-28171
It is already known in the publication No. Its characteristics are:
The second half of the raising device also serves as the tip conveying device of the conveying device that supplies the tip of the harvested grain culm to the threshing device.

In general, for good automation of the processing depth adjustment in threshing equipment, it is necessary to correctly detect the length of the grain culm. Conventionally, as shown in Japanese Patent Application Laid-Open No. 51-118624, for example, a culm length detection sensor was provided at a position where the grain culm before harvesting was combed and elongated by a pulling device, and an accurate sensor was installed to detect the grain length. The culm length is detected, and this idea was inherited by the combine harvester with the previous configuration.

[Problem that the invention attempts to solve]

In order to improve the accuracy of automatic control, feedback control may be performed by feeding back to the control system the handling depth adjustment amount of the grain culm holding and conveying device that supplies the harvested grain culm to the threshing device. In this case, in the conventional technology, the position of the culm length detection sensor is made movable and its position is adjusted in conjunction with the adjustment of the handling depth, or a sensor for detecting the handling depth is provided separately, and both Since the detection results of the sensors were compared, special configurations such as interlocking means and comparison means were required.

The present invention aims to simplify the configuration for the feedback control by utilizing the characteristics of the combine harvester described above.

[Means for solving problems]

The characteristic configuration of the present invention is that, in the above-described combine harvester, the culm length of the grain culm that has been conveyed to or near the conveyance end of the grain culm holding and conveying device is attached to the grain culm pulling device portion at the end of the lifting path. A handling depth control device that includes a sensor for detecting the grain and controls vertical swinging of the grain culm holding and conveying device based on the detection result of the culm length detection sensor in order to keep the handling depth in the threshing device substantially constant. The point is that we have established this.

[Effect]

With the above configuration, the stalk part is held by the grain culm holding and conveying device, and the grain tip part is combed and elongated by the terminal part of the pulling device, and the length of the grain culm after reaping is detected. Additionally, when the handling depth is adjusted by vertically swinging the starting end of the grain culm holding and conveying device, the relative position of the terminal end of the pulling device and the grain culm tip moves up and down accordingly. As a result, the amount of movement of the grain culm holding and conveying device is fed back to the culm length detection sensor as a change in the ear tip position.

[Effect of idea]

Therefore, according to the configuration of the present invention, not only can the length of the grain culm be detected correctly, but also the feedback control method can be adopted without the conventional special interlocking means or special comparison means, and the accuracy can be improved. This has the effect of easily implementing high handling depth control.

〔Example〕

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

It engages with the base of the two-row upright grain culm to pull it backward and upward, and the terminal end is located at the rear of the machine body rather than the clipper-type reaping device 3, and the terminal end is located in the width direction of the machine body when viewed from the front. A grain culm lifting device 1 having an almost inverted dogleg-shaped lifting path A curved on one side.
will be established. The middle part of the stalk of the grain culm cut by the reaping device 3 is sandwiched between this pulling device 1 and a threshing device 2 mounted at the rear of the machine, and this is held in cooperation with the pulling device 1. While gradually changing its posture to a sideways posture by working, the grain was transported and fed to the transport end of the threshing feed chain 2A, and its transport route overlapped with the end of the lifting route A in the grain culm transport direction. A grain culm holding and conveying device 4 is installed so as to be vertically swingable around a horizontal axis a near the end of its conveyance.
A pair of left and right lifting frames 1A, 1 of the lifting device 1
In B, on the front surface of the upper end of the pulling frame 1A located on the side opposite to the side where the threshing feed chain 2A is present, there is a groove extending to or near the conveyance end of the grain culm holding conveyance device 4. Two culm length detection sensors 5, 5' for detecting the culm length of the transported grain culms are provided in a state of protruding toward the lifting path A side.
Between the grain culm holding and conveying device 4 and the reaping frame 6, the grain culm holding and conveying device 4 is vertically swung around the horizontal axis a based on the culm length detection results of the sensors 5 and 5'. Therefore, a hydraulic cylinder 7 of a handling depth control device is interposed to automatically adjust the handling depth in the threshing device 2 to keep it substantially constant.

In addition, 8 in the figure is a position protruding from the lower end of the pulling frame 1B located on the lateral side of the side where the threshing feed chain 2A is present among both the lifting frames 1A and 1B to the pulling path A side. This is the activation switch for the handling depth control device.

When only the sensor 5 located at the lower front among the culm length detection sensors 5 and 5' operates, the handling depth at that time is maintained.
When both of the sensors 5, 5' are detected, the grain culm conveying device 4 is swung upward around the horizontal axis a to control the grain in the shallow handling direction. When neither of the sensors 5, 5' detects the grain, the grain culm conveying device 4 is swung downward about the horizontal axis a to control the grain in the deep handling direction.

In the above embodiment, the culm length detection sensor 5,
Although the sensor 5' is provided on the front side of the lifting frame 1A, the sensors 5, 5' may be installed inside the lifting frame 1A or on the back side thereof.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Figure 1 is an overall side view of the combine harvester, Figure 2 is a plan view of the main parts, and Figure 3 is a side view of the entire combine harvester.
The figure is an enlarged partially cutaway view of the main part. 1... Grain culm pulling device, 2... Threshing section, 3...
Reaping device, 4... Grain culm holding and conveying device, 5, 5'...
...Culm length detection sensor.

Claims (1)

[Scope of utility model registration request] A grain culm puller whose terminal end is located at the rear of the machine body relative to the reaping device 3, and which has a substantially inverted dogleg-shaped pulling route A in which the terminal end is curved to one side in the width direction of the machine body when viewed from the front. The grain culm after being raised and harvested is conveyed between the threshing device 1 and the threshing device 2, and its conveyance path overlaps the terminal end of the said hoisting path A in the grain culm conveyance direction, and the conveyance start end In a combine harvester equipped with a grain culm holding and conveying device 4 that adjusts the handling depth in the threshing device 2 by vertical swinging, a part of the grain culm pulling device 1 at the end of the lifting path A includes:
Sensors 5 and 5' are provided to detect the culm length of the grain culm transported to or near the end of transport of the grain culm holding and transporting device 4, and in order to make the handling depth in the threshing device 2 almost constant, Culm length detection sensor 5,
5'. A combine harvester characterized in that a handling depth control device is provided for controlling the vertical swing of the grain culm holding and conveying device 4 based on the detection result of the grain culm holding and conveying device 4.