JPH08172867A - Threshing depth control device of combine harvester - Google Patents

Abstract

PURPOSE: To obtain a threshing depth-control device of a combine harvester, capable of reducing threshing-missed grain straws and non-threshed grain straws, when the grain straws on the side of a balk are threshed. CONSTITUTION: An extremely short straw-detecting sensor S3 for detecting shorter straws than a predetermined length is disposed at a passage part on the latest reaped side and on the upstream side of the grain straw-carrying direction from a position for controlling the threshing depth. When the extremely short straw-detecting sensor S3 detects an extremely short straw, a threshing depth-controlling means is operated to a preliminarily set threshing depth position with a threshing depth control means 100 in spite of the detection result of a threshing depth-detecting sensor disposed at a passage part on the downstream side of the grain straw-carrying direction from the threshing depth- control position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handling depth adjusting means for adjusting the handling depth in the threshing device and a handling depth adjusting means for controlling the handling depth in the threshing device in a grain culm conveying path to the threshing device. A handling depth detection sensor for detecting the tip position of the transported grain culm is provided in the route portion on the lower side of the grain culm transport direction than the location, and based on the detection information of the handling depth detection sensor, the target handling depth is set. The present invention relates to a combine handling depth control device provided with control means for actuating the handling depth adjusting means to maintain.

[0002]

2. Description of the Related Art Conventionally, in automatically adjusting the handling depth of a combine, as shown in Japanese Patent Laid-Open No. 299508/1990, the conveyance of a vertical conveyance device whose front end can be vertically swung with a rear part as a fulcrum. Two culm length sensors, a short culm detection sensor and a long culm detection sensor, are provided on the path. When both sensors are turned on, the vertical conveyor is raised around the horizontal axis and controlled to the shallow handling side. In other words, if the position for inheritance from the auxiliary transport device is changed to the upper position to control to the shallow handling side, and the short culm detection sensor is ON and the long culm detection sensor is OFF, the handling depth is Is judged to be in the proper range and is not controlled, and when both sensors are turned off, the vertical conveyance device is lowered around the horizontal axis and controlled to the deep handling side.

[0003]

As described above, according to the conventional handling depth control, whether the tip of the grain culvert is located between the two sensors based on the longest grain culm as a reference, or The handling depth is controlled by detecting whether it is protruding from both sensors or retracting from both sensors.

On the other hand, the rice culms in the paddy fields are poorer in the growth of the rice culms on the edge of the ridge than the central culm due to the condition of drainage or the hardness of the mud. And it may be short culm.

Therefore, in a combine for performing multiple cutting, when cutting grain culms on the edge of the ridge, the depth of handling is controlled with reference to the longest grain culvert on the inner side of the fuselage. The grain culm closest to the ridge has the inconvenience that it is discharged to the outside of the machine with the unhandled state left.

[0006] It is an object of the present invention to provide a combine control depth control device capable of reducing the amount of untreated residual culm left untreated.

[0007]

The present invention according to claim 1 is, in the grain culm conveying direction upper side than the handling depth adjusting portion,
In addition, the path portion on the most mown side is provided with a sensor for detecting an extremely short culm which detects a short culm below a setting, and the control means, when the sensor for detecting an extremely short culm detects an extremely short culm, the handling depth is set. The depth adjusting means is configured to operate at a preset deep handling position regardless of the detection result of the depth detecting sensor.

According to the present invention of claim 1, when the ultrashort culm detecting sensor detects an ultrashort culm, the handling depth is set to a preset deepest handling position regardless of the detection result of the handling depth detecting sensor. It is arranged to activate the adjusting means.

[0009]

[Operation] While cutting the edge culms by cutting around,
When the extremely short culm detection sensor on the most trimmed side detects an extremely short culm below the setting, it is controlled to the preset deep handling position or deepest position regardless of the detection result of the original handling depth detection sensor. To do.

[0010]

As a result of the above-mentioned constitution, it is possible to prevent or reduce the non-threshing left untreated on the edge culms.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, this combine has a pair of left and right crawler traveling devices 1, 1, a threshing device 2, a driver's seat 3
The reaper 4 is provided at the front of the machine equipped with. The reaping unit 4 includes a pair of left and right raising devices 5, a reaping device 6 for cutting the roots of the raised culms, a vertical conveying device 8 for conveying the reaped grains to the threshing feed chain 7, and a raising device 5. An auxiliary transfer device 9 for transferring the cut culm to the vertical transfer device 8 is provided between the vertical transfer device 8 and the vertical transfer device 8.

As shown in FIG. 2, the vertical transfer device 8 has
Stock holding device 8a for holding and carrying the stock side of the cut grain culm
And the tip locking and conveying device 8b that locks and conveys the tip end side of the cut grain culm, inherits the cut grain culm from the auxiliary transporting device 9 and conveys the cut grain culm to the rear of the machine in an upright position, and laterally at the conveyance end portion. It is configured to supply the threshing feed chain 7 after changing to a tilted posture.

Further, the end portion of the vertical transfer device 8 is pivotally supported by the machine body so as to be swingable about the horizontal axis P, and the handling depth is adjusted by vertical swing. That is,
The support position of the harvested grain culm supplied from the auxiliary transport device 9 is changed to the culm direction in accordance with the vertical swing, and as a result, the harvested grain culm delivered from the vertical transport device 8 to the threshing feed chain 7 is changed. The position is changed to the culm direction, and the handling depth in the threshing device 2 is changed and adjusted.

The rocking operation structure of the vertical transfer device 8 will be described. An electric motor 10 is provided, and a rack 11a is attached to a handle depth adjusting lever 11 which is rockable around a horizontal axis Q, and the rack 11a is provided. A pinion 10a that engages with is attached to the electric motor 10. The inverted U-shaped member 8A that also serves as the frame of the vertical transfer device 8 and the arm 12 are interlockingly connected via the push-pull rod 13.
By vertically rotating the electric motor 10, the vertical transfer device 8 is vertically swung. In this way, the vertical conveyance device 8, the electric motor 10, the pinion 10
a, rack 11a, and arm 12 for handling depth adjusting means A
Is configured.

As shown in FIG. 3, the inverted U-shaped member 8A
In addition, a pair of upper and lower handling depth detection sensors S are arranged side by side in the culm direction of the transported grain culm, and the tip side is the long culm detection sensor S ₁ and the stocker side is the short culm. It is configured in the detection sensor S ₂ . The sensor S is composed of a sensor bar 14 which is swingable downward on the upper end side in the grain culm transport direction, and a switch portion 15 which detects the swing of the sensor bar 14. Then, as shown in FIG. 5, the raising device 5 on the right side
In addition, the ultra short culm detection sensor S ₃ that detects short culms below the setting
2, and at the beginning of the vertical conveyor 8, there is a grain succulent presence / absence detection stock source switch S ₄ for automatically driving the vertical conveyor 8 when a grain culm is detected. The sensors S ₃ and S ₄ are provided, and the sensor bar 16 is swung backward to the lower side in the grain transfer direction and is biased to return to the upper side of the transfer, and a switch unit 17 for detecting the backward swing of the sensor bar 16. Consists of. Then, as shown in FIG. 6, the detection signals from the sensors S ₁ to S ₄ is inputted to the control unit H comprising a microcomputer, the sensors S ₁
The handling depth adjusting motor 10 is driven via a drive circuit based on the detection from S ₄ to S ₄ .

Next, the operation of the control device H will be described based on the flow chart shown in FIG. In principle, the motor 10 is operated to maintain the target handling depth based on the detection information of the handling depth detecting sensor S. However, when the extremely short culm detecting sensor S ₃ detects the extremely short culm, the motor 10 is operated to a preset deepest handling position. First, the stock source switch S ₄ is checked to determine whether or not the mowing operation is in progress. If the cutting operation is being performed, it is checked whether or not the detection information of the extremely short culm detecting sensor S ₃ has changed. When it changes from ON to OFF, the motor 10 is actuated to the preset deepest handling side, assuming that it is an extremely short culm. When there is no change in the detection information of the extremely short culm detection sensor S ₃ , the long culm detection sensor S of the handling depth detection sensor S
Check the detection information of ₁ and the short culm detecting sensor S ₂ .
When both the long culm sensor S ₁ and the short culm sensor S ₂ are ON, the vertical conveying device 8 is arranged so that the tip portion of the conveyed grain culm may pass between the long culm sensor S ₁ and the short culm sensor S _2. Is controlled to the shallow side. When both the long culm sensor S ₁ and the short culm sensor S ₂ are OFF, the tip of the conveying grain culm is vertically conveyed so as to pass between the long culm sensor S ₁ and the short culm sensor S _2. The device 8 is controlled to the deep side. Also, the long culm sensor S ₁ is O
If N and the short culm sensor S ₂ are OFF, it is determined that floating straws are generated, the control operation is stopped, and the alarm device B is operated. In this way, the control device 100 is configured using the control device H.

Further, the crawler traveling device 1 of this combine is constructed so as to be capable of rolling control. The rolling control structure will be described. As shown in FIG. 4, the drive sprocket 1a is provided at the front end and the tension wheel 1b is provided at the rear end.
A movable frame 19 in which a plurality of idle wheels 1c are mounted to a track frame 18 in which is mounted is equipped with a pair of parallel cranks 20 equipped with a pair of bell cranks swinging around a horizontal axis Y, and a parallel four links thereof. It is configured to be able to drive up and down via a hydraulic cylinder 21 that operates the link mechanism 20,
The movable frame 19 is driven by the driving force of the hydraulic cylinder 21.
Is moved up and down in a horizontal posture to move up and down the ground contact portion of the crawler belt 1A, in other words, the track frame 18 or the machine body is lifted with reference to the crawler belt ground contact portion. In the left and right crawler traveling devices 1, the movable frame 1
By changing the amount of elevation of 9 differently, the machine body can be rolled. Then, the body is provided with a gravity type inclination angle detection device 22 for detecting a left and right inclination angle with respect to the horizontal reference plane, and based on information from the inclination angle detection device 22, the body is brought into a horizontal posture via the control device H. So that the control valves 23,
Control 23.

The crawler traveling device 1 can be selectively switched between a manual mode and an automatic mode by a manual / automatic changeover switch 24 provided on a control panel, and can be manually operated by a Monroe manual lever 25 provided on the control panel. Further, the pair of left and right Monroe foot pedals 26, 26 provided in the steering step can be manually operated. The pair of left and right foot pedals 26, 26
When the steering lever 27 and the speed change lever 28 are operated to change the speed and steer to arbitrarily adjust the inclination angle of the machine body, the foot pedals 26, 26 can be easily operated.

Further, when the overturning moment of the machine body becomes large beyond the rolling control range and the machine body is nearing the fall, the alarm device B is operated to issue an alarm. The alarm device B differs from an alarm sound indicating a fall of the machine body and an alarm sound indicating that a floating streak is generated during the handling depth control. The period of the intermittent sound is shortened so that the closer to, the more the tension is notified.

The vertical conveying device 8 can be selectively switched between an automatic mode and a manual mode by a manual / automatic changeover switch 29, and can be manually operated by an elevating lever 11 when switched to the manual mode.

[Embodiment] In the above-mentioned embodiment, the sensor S ₃ for detecting extremely short culm is configured to control to the deepest handling position when detecting the extremely short culm, but the sensor for detecting extremely short culm S ₃
It may be configured such that the vertical position can be changed and the handle depth can be adjusted to an arbitrary value.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a side view of the front part of the combine.

FIG. 2 is a schematic side view of a vertical conveyance device.

FIG. 3 is a front view of a vertical conveyance device.

FIG. 4 is a schematic side view of the traveling device.

FIG. 5 is a plan view of the whole combine.

FIG. 6 is a block diagram.

FIG. 7: Flow chart

[Explanation of symbols]

2 Threshing device A Handling depth adjusting means 100 Control means S Handling depth detection sensor S ₃ Ultra short culm detection sensor

Claims (2)

[Claims] 1. A handling depth adjusting means (A) for adjusting a handling depth in the threshing device (2) and a handling depth adjusting means (A) in a grain culm conveying path to the threshing device (2). ), A handling depth detection sensor (S) for detecting the tip position of the transported grain culm is provided in the path portion on the lower side in the grain culm transport direction than the location for adjusting the handling depth, and the handling depth detection sensor (S) is provided. The handling depth adjusting means (A) for maintaining the target handling depth based on the detection information of
Is a combine depth control device provided with a control means (100) for activating, and is on the side closer to the grain culm transport direction than the depth adjustment position, and on the path part on the most cut side, Ultra short culm detection sensor (S
₃ ) is provided, and the control means (100) is preset regardless of the detection result of the handling depth detection sensor (S) when the extremely short culm detection sensor (S ₃ ) detects an extremely short culm. A combine handling depth control device configured to operate the handling depth adjusting means (A) to a deep handling position. 2. The combine handling depth control device according to claim 1, wherein when the extremely short culm detecting sensor (S ₃ ) detects an extremely short culm, a detection result of the handling depth detecting sensor (S). Regardless of this, a combine handling depth control device configured to operate the handling depth adjusting means (A) to a preset deepest handling position.