JPH0123090B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to an adjustment device for a lodging grain culm lifting device of a combine harvester.

(B) Prior Art A technique for adjusting the end position of the tines in conjunction with the adjustment of the working depth has been known. For example, as in Japanese Utility Model Application Publication No. 54-48832.

(c) Problems to be Solved by the Invention However, in the above-mentioned conventional technology, the operator was configured to adjust the end position of the lifting tine using a manual adjustment lever. In cases where there are alternating short and long culms, it is necessary to constantly adjust the action end position of the tines by using a manual lever, and there are many other adjustment points, so it is not possible to make sufficient adjustments.

If the adjustment of the end position of the hoisting tine does not match the grain culm length, the hoisting tine will apply a hoisting action beyond the drooping tip of the ear, causing it to hang from the neck to the tip of the ear. There were problems with the straining caused by the raising tines, which caused the tips of the ears to be torn off and the grains to shed.

In order to solve these conventional problems, the present invention is designed so that the action of the lifting tine is always terminated immediately before the ear neck of the grain culm and the tine is retreated.

(d) Means for Solving the Problems The objects of the present invention are as described above, and the configuration for achieving the objects will now be explained.

A sensor 15 that detects the position of the tip of the grain culm is fixed to an adjustable tine guide 14a that can be adjusted up and down with respect to the fixed tine guide 14, and the adjustable tine guide 14a is a reversible rotary motor that rotates by a signal from the sensor 15. The sensor 15 is placed in a position where it comes into contact with the upper surface of the hanging tip in front of the upper part of the path of the lifting tine 6, and when the tip does not come into contact with the sensor 15, , setting the reversible rotation motor 16 to always move the adjustment tine guide 14a downward;
The action end position of the tines is set below the sensor 15 by the thickness of the tip.

(E) Embodiment The object and structure of the present invention are as described above. Next, the structure of the embodiment shown in the attached drawings will be explained.

FIG. 1 is an overall front view of the combine harvester of the present invention.

Large weeding bodies 1, 1', 1'' are provided protruding from the leading edge of the combine, and small weeding bodies 2, 2' are pulled up to the front of the grain culm passage between cases 7a, 7b, 7c, 7d. It is provided.

The grain culm is separated by these cutting bodies, guided to the grain culm passage, engaged with the raising tines 6, and raised so as to be raised.

The stock part is scratched by star wheel 5,
They are cut almost simultaneously by the cutting blade 4.

Then, the tip portion is transferred from the lifting device to the upper transfer device and placed on the entrance iron plate of the threshing device 10, and the stock head portion is transferred to the vertical transfer device 8 via the lower transfer device, and is placed on the iron plate at the entrance of the threshing device 10. The length of the culm is adjusted when the grain is transferred from the grain to the feed chain 9 of the threshing device 10.

3 is a crawler-type traveling device, 11 is a steering device, 12 is a seat, and 13 is a grain tine.

FIG. 2 is a drawing showing the inside of the lifting case 7, and FIG. 3 is a cross-sectional perspective view of the lifting case 7.

The lifting tines 6 are erected with their abutting portions 6a against the tine guides 14, but in the present invention, the tine guides are divided into two parts, and the upper short adjustable tine guides 14a are connected to the lower fixed tine guides. It is configured to abut against the tine guide 14 and to be able to slide up and down. 20 is a chain that pivots on the tines, 19,2
1 is the upper and lower sprocket.

FIG. 4 is a diagram showing a method of adjusting the tines,
FIG. 5 is a drawing showing the operating state, and FIG. 6 is a block diagram of automatic control.

A sensor 15 equipped with a switch element such as a micro switch is fixed to the adjustment tine guide 14a, and the adjustment tine guide 14a is automatically moved up and down by the rotation of a female screw body 18 and a screw rod 17 fixed to the back surface. The screw rod 17 is directly connected to the motor shaft of the reversible motor 16, and rotates in forward and reverse directions according to a signal from the sensor 15.

The sensor 15 is arranged at a position where it can easily come into contact with the upper surface of the hanging tip of the grain culm caused by the raising tines 6.

That is, the tip is positioned in front of and above the passing locus of the lifting tine 6, and is always in contact with the front upper surface of the tip caused by the lifting tine 6, so that the thickness of the tip is maintained between the upper surface of the lifting tine 6 and the upper surface of the tip. The reversible rotary motor 16 is rotated to move the adjustable tine guide 14a up and down so that it is located at the front of the upper part with an interval of 10 minutes apart.

When the drooping tip of the grain culm pushes the sensor 15 upward, the reversible rotary motor 16 rotates and moves the adjustment tine guide 14a upward. The reversible rotary motor 16 is set to rotate so as to move it downward.

As a result, the end position of the tine is always set at a position below the sensor by the thickness of the tip. Tip A indicates a long culm, and tip B indicates a short culm.

(F) Effects of the Invention Since the present invention is configured as described above, it has the following effects.

First, unlike the conventional technique described in Japanese Utility Model Application Publication No. 54-48832, the operator does not use a manual lever to raise the tine to determine and adjust the end position of the tine. The upper surface position of the tip of the ear is detected and the action of the tines 6 is terminated at the position of the tip of the ear.
There is no need to operate a manual lever in response to changes in the long culm.

Second, since the detection of the grain culm length is carried out by the sensor 15 placed above the locus of movement of the tines 6, the sensor 15 comes into contact with the upper surface of the position where the tip of the grain hangs, and also the position of the head of the grain where it comes into contact. Tine 6
Since the tip of the grain that has drooped and bent is not pulled up and forcibly stretched straight by the tines 6, it is pulled up just before that and the tines 6 are moved back, making it difficult to pull out the tip of the grain or to pull out the entire grain culm. In addition, the lifting tines 6 can prevent grains from being shed by pulling up the tip of the ear.

[Brief explanation of drawings]

Fig. 1 is an overall front view of the combine harvester of the present invention, Fig. 2 is a drawing showing the inside of the hoisting case, Fig. 3 is a cross-sectional perspective view of the hoisting case, and Fig. 4 is a drawing showing a method of adjusting the tines. FIG. 5 is a drawing showing the operating state, and FIG. 6 is a block diagram of automatic control. 6... Lifting tine, 7... Lifting case, 1
4...Tine guide, 15...Sensor, 16...
...Reversible rotary motor, 17...Screw rod, 18...
Female screw body.

Claims (1)

[Claims] 1 A sensor 15 that detects the position of the tip of the grain culm,
It is fixed to an adjustable tine guide 14a that can be adjusted up and down with respect to the fixed tine guide 14, and the adjustable tine guide 14a can be automatically moved up and down by a reversible rotary motor 16 that rotates in response to a signal from a sensor 15. The adjustment tine guide 14a is arranged in a position where it comes into contact with the upper surface of the hanging tip in front of the upper part of the path of the pulling tine 6, and is reversible so as to always move the adjusting tine guide 14a downward when the tip does not come into contact with the sensor 15. A grain culm pulling device for a combine harvester, characterized in that a rotary motor 16 is set so that the action end position of the tines is located below the sensor 15 by the thickness of the ear tip.