JPH0126652B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a group of sensors capable of detecting the culm length of a planted stem culm that has been forcibly pulled up into an upright position by a lifting device over a certain range in the vertical direction. The present invention relates to a combine harvester that is equipped with a control device that can automatically adjust the processing depth in a threshing section based on group detection results so that the processing depth is maintained within a set range.

In such combine harvesters, the culm length of the planted stem culms varies greatly depending on the variety of the stem culm, growth conditions such as sunlight and fertilization, as well as region and field conditions. Regardless, in order to accurately perform the desired automatic handling depth control, it is necessary to have good culm length detection accuracy over a wide range from ultra-short culms to ultra-long culms.

However, for example, if the sensor group is simply arranged over a wide range in the vertical direction to correspond to expected ultra-short culms to ultra-long culms, a very large number of sensors are used. These need to be distributed in the vertical direction, which not only increases the number of sensors, but also complicates the linkage mechanism between them and the control device, resulting in severe economic disadvantages.Furthermore, the culm length between fields Even though there are large differences in culm length due to the factors mentioned above, the difference in culm length between fields is generally very small, and therefore, when looking at each field, the number of sensors that are actually activated for detection is extremely small. It is very disadvantageous to arrange so many sensors one above the other, even though few and most of the sensors are inactive and virtually unnecessary.

In view of this, an object of the present invention is to make it possible to reliably and accurately detect a wide range of culm lengths, from ultra-short culms to ultra-long culms, by using only a small number of sensor groups. has.

The combine harvester according to the present invention is characterized in that the culm length detection range by the sensor group can be vertically adjusted and fixed, and is provided with a mechanism that can adjust the operating reference value of the control device. do.

In other words, by configuring the culm length detection range by the sensor group so that its position can be adjusted and fixed up and down, the number of sensor groups used can be reduced as much as possible within the range that can accommodate small culm length differences in each field, and the actual culm length detection range by these can be reduced. By narrowing the culm, the overall configuration is advantageous from the manufacturing and economical viewpoints, and culm length detection can be performed reliably and accurately over a wide range from ultra-short culms to ultra-long culms. Moreover, by providing a mechanism for adjusting the operating reference value of the control device, it is possible to correct the operating reference value to match the amount of change in the vertical position of the sensor group, so regardless of the change in the position of the sensor group, the detection results We were able to accurately perform the desired automatic handling depth control based on the following.

In particular, when the sensor group is equipped with a device that measures the amount of vertical position adjustment of the sensor group and a device that displays the required adjustment operation reference value of the control device corresponding to the measuring device, The operation reference value required for adjusting the vertical position of the culm length detection range can be easily and accurately adjusted.

Below, an embodiment of the present invention will be described based on the drawings. The front part of the machine is equipped with a crawler traveling device 1, a threshing section 2, a weeding tool 3, a pulling device 4, a clipper-type reaping device 5, and a reaping device 5. The stalk culm can be conveyed while being clamped to the threshing section 2, and the handling depth in the threshing section 2 can be changed by changing the stalk culm clamping position in the grain length direction by vertically swinging around the rear fulcrum R. A device 8 for detecting the culm length of a planted stem culm forcibly raised to an upright position by the lifting device 4 in a combine harvester equipped with a clamping and conveying device 6 and connected with a reaping section 7, and the detection result thereof. A control device 9 is provided which can automatically adjust the treatment depth so that it is maintained within a set range.

The detection device 8 includes three sensors S ₁ , S ₂ , S ₃ capable of detecting a planted stem culm by contacting it with a stay 10 installed at an appropriate height on the back side of the lifting device 4.
are attached at appropriate regular intervals in the vertical direction,
Based on the height of the sensor groups S ₁ , S ₂ , S ₃ from the ground,
By detecting non-contact of all sensors S ₁ , S ₂ , S ₃ , it is detected that the culm length is less than the ground height of lower sensor S ₁ , and by detecting contact by only lower sensor S ₁ , It is detected that the culm length is a first reference culm length that is greater than or equal to the height above the ground of the lower sensor _S1 and less than the height above the ground of the intermediate sensor _S2 , and the lower sensor _S1 and the intermediate sensor _S2
, the second sensor whose culm length is greater than the ground height of the middle sensor S ₂ and less than the ground height of the upper sensor S ₃ is detected.
Detects that the standard culm length is reached, and all sensors S ₁ ,
By detecting contact between S ₂ and S ₃ , the culm length is determined by the upper sensor S ₃
The structure is configured to detect that the culm length is greater than or equal to the height above the ground.

When the culm length of the planted stem culm is the first reference culm length, the control device 9 controls the reaping unit swinging posture to clamp the stem culm so that the handling depth for the planted stem culm is within a set range. a posture detector 1 for detecting the swinging posture of the clamping and conveying device 6 relative to the reaping section, using the reference posture as a reference posture;
1 and the sensor groups S ₁ , S ₂ , S ₃
When the detection results of the sensor groups S ₁ , S 2 , and S ₃ are the first standard culm length based on the detection results of the sensor group S 1 , S ₂ , and S 3 , the holding and conveying device 6 is swung to the standard posture. and sensor groups S ₁ , S ₂ , S ₃
When the detection result is the second standard culm length, the clamping and conveying device 6 is clamped at the stem culm of the second standard culm length at an upper position that is appropriately spaced from the clamping position in the standard posture. The stem culm is swung to a second standard posture that keeps the handling depth within the set range, and when the detection results of the sensor groups S ₁ , S ₂ , and S ₃ are less than the first standard culm length, the stem culm is held in the standard posture. The stem culm is swung to a position where the stem culm is held at a lower position appropriately spaced from the position, and when the detection result of the sensor group S ₁ , S ₂ , S ₃ is equal to or greater than the second reference culm length, the second The drive arm 12 is provided with a drive arm 12 that swings the stem culm to a position above the gripping position at an appropriate distance from the standard position. The attitude detector 11 detects the attitude of the clamping and conveying device 6 relative to the reaping section based on the attitude of the drive arm 12 relative to the reaping section.

Therefore, the stay 1 of the sensor group S ₁ , S ₂ , S ₃
The culm length detection range by the sensor group S ₁ , S ₂ , S ₃ is configured to be vertically adjustable and fixed, and the control device 9 is operated. The reference value, i.e.
Mechanism 13 capable of adjusting the reference posture of the clamping and conveying device 6
and a device 14 for measuring the amount of vertical position adjustment of the sensor groups S ₁ , S ₂ , S ₃ , and a device 15 for displaying the required adjustment operation reference value of the control device 9 corresponding to the measuring device 14 . It is provided.

The operation reference value adjustment mechanism 13 is constructed by attaching the attitude detector 11 to the reaping section 7 through a long hole 16 and a set bolt 17 so that the attitude can be changed and fixed.

The measuring device 14 is configured such that the lifting device 4 is provided with a scale 18 for measuring the amount of movement with a scale indicating the height above the ground, and a mark 19 is provided on the stay 10.

The display device 15 has a scale attached to a portion of the reaping section 7 around the attitude detector 11 to measure the amount of operation with a scale corresponding to the scale attached to the pulling device 4, and a scale for measuring the operating amount. It is configured with a mark of 11. In addition, the scale and mark are those used when threshing rice, 20, 20',
It is divided into two parts 21 and 21' for use in threshing wheat.

In the above configuration, the lower sensor S ₁ and the middle sensor S ₂ are connected based on the average culm length in the field.
While adjusting the sliding movement of the sensor groups S ₁ , S ₂ , and S ₃ so that the upper side of the planted stem culm passes between the
Based on the first reference culm length detection by the sensor groups S ₁ , S ₂ , and S ₃ , the control device 9 adjusts and operates the mechanism 13 to maintain the working depth within the set range.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of drawings]

The drawings show an embodiment of a combine harvester according to the present invention, with FIG. 1 being a side view of the main parts, and FIG. 2 being an enlarged side view of the main parts. 4...Triggering device, _S1 ... _S2 , _S3 sensor, 2
... threshing section, 9 ... control device, 13 ... operation reference value adjustment mechanism, 14 ... measuring device, 15 ... display device.

Claims (1)

[Claims] 1. Sensor group S ₁ , S ₂ , S ₃ capable of detecting the culm length of a planted stem culm forcibly raised into an upright position by the lifting device 4 over a certain range in the vertical direction A control range 9 is provided that can automatically adjust the handling depth in the threshing section 2 based on the detection results from the sensor groups S ₁ , S ₂ , and S ₃ so that the depth is maintained within a set range. In a certain combine harvester, the sensor group S ₁ ,
A combine harvester characterized in that the culm length detection range by S ₂ and S ₃ is configured to be vertically adjustable and fixed, and is provided with a mechanism 13 that can adjust the operating reference value of the control device 9. 2. A device 14 for measuring the amount of vertical position adjustment of the sensor groups S ₁ , S ₂ , S ₃ , and a device 15 for displaying the required adjustment operation reference value of the control device 9 corresponding to the measuring device 14 . A combine harvester according to claim 1.