JP3379117B2 - Grain harvester in combine 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 combine grain reaping device having two sets of upper and lower cutters for performing ear cutting and stock cutting at the same time, and automatically storing a lower cutter for stock cutting. .

[0002]

2. Description of the Related Art In a combine having an upper cutter and a lower cutter, after raising the upper cutter,
When the height reaches a certain height, the lower cutter is generally lifted automatically.

[0003]

In the technology having a cutter having such a configuration, the culm height greatly varies depending on the culm length, the degree of lodging, etc. of the grain to be harvested, so that it is necessary to set the cutting height of the upper cutter in a wide range. was there. Therefore, the operation of the automatic storage device for the lower cutter is generally set so that the upper cutter can be moved up to a non-cutting position at a sufficiently high position.

Therefore, when harvesting a crop with a low culm height, even if the operator raises the mowing device sufficiently to the culm height in an attempt to turn, the height at which the lower cutter is automatically stored must be reached. In many cases, the lower cutter was not stored, and when turning, the lower cutter contacted the ground and could be damaged.

[0005]

In the invention according to claim 1, an upper cutter 1 for cutting the ear side of the grain culm and a planter side of the grain culvert located behind the upper cutter 1 are set at a constant height above the ground. A lower cutter 2 for mowing, and the upper cutter 1 is
Based on the tip sensor 27 that recognizes the ear side, the ear side of the grain culm
To change the steering direction of the combine
The delay relay 23 is operated by the steering operation of the steering lever 3.
The lower cutter based on the operation delay time set in
2 is raised to the non-reaping position, the steering lever
As the displacement amount of 3 increases, the delay relay 23
The operation delay time is shortened, and the displacement amount of the steering lever 3 is less than a predetermined value.
If it gets larger, it can be stored directly without going through the delay relay 23.
The tip sensor 27 is configured to operate the ray 24.
Detects a low value and lowers the upper cutter 1 close to the ground.
Then, the cutting height control of this upper cutter 1 is the height from the ground.
Control based on the cutting height sensor 28 for detecting
The upper cutter 1 cuts the culm at a predetermined height above the ground
And the lower cutter 2 is in a non-cutting position.
It is characterized in that it is configured to be raised and stored
It is a grain cutting device for combine harvesters. In the invention of claim 2, wherein the Zan稈sensor 31 in front of the lower cutter 2 is provided, the said residue culm sensor 31 does not detect the Zan稈, cutter housing to increase the lower cutter 2 to the non-cutting position A device is provided .
The grain culm harvesting device in the combine according to 1 .

[0006]

According to the first aspect of the invention, the upper and lower two-stage covers are provided.
A combine harvester with
Raise the lower cutter 2 for mowing to the non-mowing position.
The cutter storage device that operates with the steering lever 3
The cutter is automatically stored in connection with the steering operation of the lever 3.
The device is activated and the lower cutter 2 is raised and stored. Specifically
Is the lower cutter as the displacement of the steering lever 3 increases.
-2 Shorten the operation delay time of rising and store it early,
As soon as the displacement amount of the steering lever 3 becomes larger than a predetermined value,
Then, lower cutter 2 is raised and stored. The grain culm is in a lodging state
The tip sensor 27 detects a low value,
The upper cutter 1 descends near the ground and cuts the grain side of the culm.
Work, but upper cutter 1 descends near the ground
And the cutting height control of the upper cutter 1 detects the height from the ground.
The control is performed based on the cutting height sensor 28. This and
Then raise the lower cutter 2 to the non-mowing position and store it.
It In the invention of claim 2, the residue sensor 31
When the left culm is no longer detected, the lower cutter 2 is raised and stored in the non-mowing position.

[0007]

According to the first aspect of the present invention, when the combiner reaches the end of the line and turns as described above, when the upper cutter is not raised to the non-mowing position, that is, the pulling height of the mowing section is lower. Regardless of how the cutter 2 is stored,
When the steering device is operated for turning, the lower cutter 2 is stored after a certain period of time elapses, so that damage due to contact of the lower cutter 2 with the ground is reduced.

[0008] In addition, regarding the small steering operation for aligning the position direction of the combine with the cutting line during the cutting work,
The operation time is short, and the operation ends during the set storage start delay time, and the lower cutter 2 is not housed and the mowing operation can be continued. In addition, the upper bracket
The control of the target 1 is switched to the detection of the cutting height sensor 28.
And the cutting position by the upper cutter 1 reached near the stock
Therefore, the lower cutter 2 is unnecessary. So, above
Turning by lowering the lower cutter 2 like
Sometimes it touches the unevenness of the ground and is damaged, or the upper cutter 1
Extend the life of the cutting blade without cutting the cut stock twice
can do. According to the second aspect of the present invention, when the residual culm sensor 31 no longer detects residual culm, the lower cutter 2 is raised and stored in the non-crop position. It is raised and stored. As a result, since unnecessary power is not used, horsepower loss can be prevented. Further, it is possible to prevent contact with stones or the like existing in the field scene. Of course, since there is no culm when turning, the lower cutter 2 is raised and stored in the non-mowing position. As a result, even if the detection means for detecting the turning operation fails, the lower cutter 2 is raised and stored in the non-mowing position, so that the above-described effects can be obtained.

[0009]

1 to 5, a traveling unit provided with a traveling crawler 15 is driven by a prime mover mounted on a chassis to drive a combine. One side of the traveling crawler 15 is provided with a threshing / sorting device 17 on the chassis, and a harvesting device 12 and a transport device 13 are suspended in front of the threshing / sorting device 17, and the lift cylinder 14 is expanded and contracted so that the lift cylinder 33 can be lifted and lowered. It is provided.

The mowing device 12 is provided with a reciprocating upper cutter 1 for cutting the ear side of the grain culvert in front of the mowing frame 34, and a lower cutter 2 of reciprocating form 9 for cutting the root side in the rear. In front of the upper cutter 1 and on both sides of the mowing frame 34, there is provided a weed culm 29 for causing lodging of grain stalks and separating and arranging grain stalks that are intertwined with each other by adjoining strips. A reel 16 is provided which pulls the upper cutter 1 while holding it.

With respect to the structure of the lower cutter 2, the lower cutter 2 is attached to the inverted U-shaped cutter frame 11, and is vertically moved with respect to the cutter frame guides 20, 21, 22 attached to several places on the right and left sides of the mowing frame 34. It is slidably supported and is moved up and down by the expansion and contraction of the hydraulic cylinder 7. The lower cutter 2 is connected from one side of the mowing frame 34, is provided with universal joints at both ends thereof, and is driven by an extendable and contractible cutter drive shaft 9, so that the lower cutter 2 can cope with a position change due to elevation.

A cutting height sensor 5 is rotatably supported on one rear side of the lower cutter 2, and the lower portion thereof is grounded, and the angle swung during traveling is read by a cutting height detection unit and converted into an electric signal.
In order to keep the lower cutter 2 at a certain height above the ground, the cutting height adjusting circuit 6 of the lower cutter 2 is detached and connected to the solenoid 35
Alternatively, the lower solenoid 36 is used to operate the hydraulic switching lever for expanding and contracting the hydraulic cylinder 7 to move the cutting frame 34.
Can be raised and lowered with respect to.

The lower cutter 2 is moved up and down by a lower cutter lever 30 operated by an operator, and its movement is detected by an elevating sensor 8. When a limit is reached, a limit switch 39 operates to regulate the range of vertical movement. There is. In the circuit on the solenoid 35 that shortens the hydraulic cylinder 7,
A storage relay 23 is provided. This storage relay 23
When the reaping device 12 is lifted upward during turning, it is actuated by the storage switch 25 when reaching a specified height, or when the traveling lever is set to the reverse position during traveling, the back switch 38 is turned on and the back relay 40 is activated. When the steering lever 3 is operated or the steering lever 3 is operated to the right or left, the steering lever switch 26 is turned on, and the delay relay 23
The lower cutter 2 is pulled up to the upper limit of the limit switch 39 and put into a stored state by operating a hydraulic switching valve that shortens the hydraulic cylinder 7 in either case.

The threshing sorting device 17 threshes and sorts the ears fed by the conveying device 13, sends the grains to the grain tank, and discharges the straw waste and the like from the rear side to the outside of the machine. A cabin 18 is provided in front of the other side of the undercarriage transportation device 13, and a steering lever 3 and a lower cutter lever 30 necessary for traveling and harvesting work by an operator are provided. When harvesting cereals, the height of the upper cutter 1 is adjusted so as to cut the position slightly below the ear of the grain, the lower cutter 2 is lowered close to the ground, and the cutting height sensor 5 is used to cut the ground. Adjusted to a more constant height.

As the combine advances, the upper cutter 1
Then, the ears of the grain are trimmed and sent to the threshing / sorting device 17 by using the carrying device 13. The lower cutter 2 cuts a long grain culm left on the ground at a constant height above the ground. When the harvesting work reaches the end of the field and the grain is planted, the operator operates the lever for rotating the cutting device 12 upward, and the cutting device 1
After pulling up 2, the steering lever 3 is operated to rotate and move to the next cutting strip. If the mowing device 12 is pulled up above a preset height before this turning, the storage switch 25 of the operation circuit of the lower cutter 2 is turned on, the storage relay 24 is operated, and the solenoid upper 35 is operated to switch the hydraulic pressure. The valve is moved, the hydraulic cylinder 7 is shortened, and the lower cutter 2 is pulled up. The lift sensor 8 is the lower cutter 2.
The limit switch 39 is turned off and the storage is completed.

As described above, the lower cutter is housed in a raised manner, so that it does not come into contact with the ground upon turning and is not damaged. When the cutting device 12 is pulled up for turning, the lower cutter 2 is not housed if the storage switch 25 does not reach the height, but the steering lever switch is operated when the steering lever 3 is operated for turning. 26 enters, the delay relay 23 is activated, and when the steering operation is continued, the delay relay 23 energizes the storage relay 24 after a certain set time has elapsed, operates the solenoid upper 35, and raises and stores the lower cutter 2. Reach

When the steering lever 3 is operated in small increments such as when correcting the position and direction of the combine with respect to the reaping strip, the operation ends within the operation delay time set in the delay relay 23, and the storage relay The lower cutter 2 can maintain the mowing state and continue the harvesting operation without activating 24. Further, during a sharp turn accompanied by a large movement of the steering lever 3, a large displacement amount or an operating force of the steering lever 3 is sensed, and the storage relay 24 is directly operated without operating the delay relay 23, or the steering relay 24 is operated. Depending on the amount of displacement of the direction lever 3, the operation delay time of the delay relay 23 may be shortened to reduce the risk of ground damage when the lower cutter 2 turns.

6 to 7 are different from the above example in that
The cutting height of the upper cutter 1 is detected by the tip sensor 27,
In combine to adjust the upper cutter 1 for the lodging of cereals is lowered near the ground, cutting height sensor 2 cutting height control of the upper cutter 1 when the mowing height sensor 28 is grounded to operate
The lower cutter 2 is automatically stored at the same time when it is moved to 8.

Tip sensors 27 for detecting the upper end of grain by optical or ultrasonic waves are provided on the left and right in front of the combine, such as the upper part of the left and right weeding rods 29, and this information is input to the controller 19 to set the upper end of the grain. The controller 19 outputs an instruction to the cutting height adjusting mechanism of the upper cutter 1 in order to cut the spikes in accordance with the height of the lift cylinder 1.
Adjust the height of the upper cutter 1 by expanding and contracting 4. Further, the lower part of the mowing device 12 is brought into contact with the ground, its rotation angle is detected, and the information is given to the controller 19 to operate the mowing height adjusting mechanism to make the mowing height of the upper cutter 1 constant with respect to the ground. It has a function to keep.

At the rear of the reaping device 12, a lower cutter 2
Is provided, and the cutting height sensor 5 is provided below, and according to the information, the hydraulic cylinder 7 connected to the cutting frame 34 is expanded and contracted to move the lower cutter 2 from the ground regardless of the vertical movement of the cutting device 12. It is configured to maintain a certain height. Due to the fall of the grain, the detection height of the tip sensor 27 becomes low and the cutting height sensor 28 comes into contact with the ground, and when the information is sent to the controller 19, the controller 19 adjusts the cutting height of the upper cutter 1 to the tip. Sensor 2
The cutting height sensor 28 is automatically switched from 7 and the lower cutter 2 is housed at the same time by detecting the grounding of the cutting height sensor 28.

In this way, when switching to the detection of the cutting height sensor 28, since the cutting position by the upper cutter 1 has reached near the stock plant, the lower cutter 2 is unnecessary, and By raising the lower cutter 2 in this manner, it is possible to extend the life of the cutting blade without coming into contact with the unevenness of the ground during the turning and damaging it, or cutting the stock material cut by the upper cutter 1 twice.

8 to 13 is different from the above example in that
A residual culm sensor 31 is provided between the upper cutter 1 and the lower cutter 2, and the upper cutter 1 detects the culm left on the ground by cutting the spikes with the residual culm sensor 31. When the culm is no longer detected after the cutting edge, this culm sensor 3
1 operates the storage relay 24, and the lower cutter 2
The lower cutter 2 can be prevented from being grounded and damaged during turning.

When the turning is finished and the residual culm is detected again, the lower cutter 2 descends to perform mowing. In FIGS. 8 to 10, in order to move up and down with the cutter behind the upper cutter 1,
Plate-shaped wide contact-type culm sensor 31 that covers almost the entire cutting width
An example in which a lower cutter 2 is provided is shown in FIGS.
Culm sensor 3 that moves up and down with the cutter just before and above
FIG. 12 shows a lever contact type, and FIG. 13 shows a photoelectric type.

[Brief description of drawings]

FIG. 1 is a side view of a combine.

FIG. 2 is a rear view of the lower cutter.

FIG. 3 is a wiring diagram of the lifting control mechanism.

FIG. 4 is a flowchart thereof.

FIG. 5 is an output diagram thereof.

FIG. 6 is a partial side view of a combine according to another embodiment.

FIG. 7 is a wiring diagram of the cutting height control device.

FIG. 8 is a partial side view of a combine according to another embodiment.

FIG. 9 is a partial side view showing the operation.

FIG. 10 is a wiring diagram of the lifting control mechanism.

FIG. 11 is a partial side view of a combine according to another embodiment.

FIG. 12 is a partial plan view thereof.

FIG. 13 is a partial plan view thereof.

[Explanation of symbols]

1 Upper Cutter 2 Lower Cutter 3 Steering Lever 23 Delay Relay 24 Storage Relay 26 Steering Lever Switch 27 Head Sensor 28 Cutting Height Sensor 31 Remaining Dip Sensor

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-3-15306 (JP, A) JP-A-60-196109 (JP, A) Actual development Sho-59-50227 (JP, U) (58) Investigation Field (Int.Cl. ⁷ , DB name) A01D 34/02-34/408

Claims (2)

(57) [Claims] 1. An upper cutter 1 for cutting the ear side of a grain culm.
And a lower cutter 2 located behind it for cutting the root side of the grain culm at a certain height above the ground, and the upper cutter 1
Is based on the tip sensor 27 that recognizes the ear side of the grain culm.
The ear side of the culm is cut to change the steering direction of the combine.
By changing the steering operation of the steering lever 3, the delay
The lower part based on the operation delay time set in the ray 23
When raising the cutter 2 to the non-crop position,
As the displacement amount of the direction lever 3 increases, the delay relay
The operation delay time of -23 is shortened and the amount of displacement of the steering lever 3 is reduced.
Becomes larger than a predetermined value, the delay relay 23 is not used.
The contact tip relay 24 is operated to operate the tip end sensor.
The sir 27 detects a low value and the upper cutter 1 is near the ground.
If the cutting height control of the upper cutter 1 is
Control based on the cutting height sensor 28 that detects the height of
The upper cutter 1 at the specified height above the ground.
In addition to the configuration for cutting the culm, the lower cutter 2
That it was configured to be raised and stored in the non-crop position
Grain稈刈winding device in combine characterized. Wherein provided Zan稈sensor 31 in front of the lower cutter 2, the said residue culm sensor 31 does not detect the Zan稈, provided a cutter housing unit for increasing the lower cutter 2 to the non-cutting position According to claim 1, characterized in that
Grain cutting device for the combine harvester.