JPS60118112A - Harvester - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a harvester equipped with an automatic cutting height adjustment device.

In harvesting machines, the reaping section usually has a pair h! + An automatic cutting height adjustment device is installed that raises and lowers the cutting section based on the detection result of a cutting height sensor that detects the height, and adjusts the cutting height to a predetermined cutting height. In such a harvesting machine, the reaping section is close to the field surface during work, so when the machine is moved backwards, there is a risk that the reaping section will come into contact with the screen and be damaged.

For this reason, when operating the machine to move backwards during work, it is conceivable to raise the reaping section by a predetermined amount.
If the screen is tilted or there is a convex part on the screen, when the machine is moved backwards, the reaping section will be close to the field surface even though the reaping section has risen by a predetermined amount.
The risk of damage to the cutting section cannot be avoided.

The present invention has been made in view of such circumstances, and when the aircraft is operated to move backward, the reaping section is raised for a predetermined period of time, and after that, if the height of the reaping section from the ground is below the predetermined amount, or It is an object of the present invention to provide a harvester that improves safety by further raising the reaping section for a predetermined period of time when the following conditions occur.

The present invention will be described below based on drawings showing embodiments thereof. FIG. 1 is a left side view of a harvester according to the present invention. In the figure, 1 is a running vehicle, and a threshing device 3 and the like are installed above rollers 2 that run on the lower side. On the front side of the outside traveling vehicle 1, a reaping section 8 consisting of a grass dividing plate 5 degree pulling device 6, a cutting blade 7, etc. is pivoted so as to be able to rise and fall freely by a hydraulic cylinder 4 provided at the bottom of the traveling vehicle 1. supported.

A mowing height sensor 9 is provided on the support rod 5a of the grass dividing board 5 in the mowing section K to detect the height of the mowing section above the ground.

The cutting height sensor 9 has a sensor arm 9a and a sensor box 9b, and when the sensor arm 9n slides on the screen and rotates up and down, the lowering command switch 91. A 1-ft rise switch 92 (see FIG. 2) is selectively operated to control the hydraulic cylinder 4 to raise and lower the cutting section to a predetermined cutting height.

FIG. 2 is a diagram showing the amount of control electronics 1// in the machine of the present invention. In the figure, 21 is a pantry whose negative electrode is connected to body ground, and whose positive electrode is connected via a key switch 22 to each switch and a control section 4o, which will be described later.

The control unit 40 selectively energizes or demagnetizes the solenoids Sd and Su in accordance with the status of each switch, which will be described later. It controls the elevation of the reaping section 8.

Each input terminal of the control unit 40 includes a threshing switch 23 that is turned on when the threshing clutch is in the power transmission state, a reaping switch 24 that is turned on when the reaping latch is in the power transmission state, and a lifting control for the reaping part. An automatic cutting height switch 25 that is turned on when automatic cutting is performed based on the detection result of the cutting height sensor 9, a reverse switch 26 that is turned on when the traveling device is set to reverse gear, and a cutting height sensor 9. A lower command switch 91 and a higher command switch 92 are turned on in response to the vertical rotation of the sensor arm 9a, and a manual lower switch 31 is turned on when lowering the reaping section when manually adjusting the cutting height. , also manual lift switch 32
are connected to each other, and these switches are collectively connected to the key switch 22.

The aforementioned solenoid Sd for lowering the reaping section, solenoid Su for raising the reaping section, and the automatic lamp 29 are connected to each output terminal of the control section 40, respectively.

The operation of the apparatus of the present invention constructed as described in Section 2 will be explained based on the flowchart shown in FIG. Kino, Inochi 22
When turned on, the control section 40 enters the control 1jJ (I'6 state, and turns on the rI!lJ switch 25 to automatically adjust the cutting height. When the automatic switch 25 is turned off, the manual switch is turned on. It is possible to manually adjust the mowing height using 31 and 32.Furthermore, when the reaping latch and the threshing clutch are put into the power transmission state, the reaping switch 25 and the threshing switch 23 are turned on, and the reaping section 8 and threshing section 3 are driven. Reaping and threshing becomes possible.Then, when the machine moves forward to perform reaping and threshing work, the reaping section 8
The mowing height is raised and lowered in accordance with the situation of the descending command switch 91 and the -W I')r switch 92, the automatic lamp 29 is turned on, and the reaping part 8 is When the height above the ground becomes less than (or more than) a predetermined value, the command switch 91 (also &; t 92 ) turns on, and the solenoid Sc
(or Su) is magnetized to Ijil+, and the hydraulic cylinder 4
Piston Roso "LSI m entered (or advanced),
The reaping section 8 descends (or ascends). Even in this automatic mode, priority is given to raising and lowering using the manual switches 31 and 32, and the automatic lamp 29 is clear during this manual adjustment.

During such reaping work, when the traveling device is set to the reverse gear to move the machine backward, the reverse switch 26 is turned on. In this case, the threshing clutch is in the engaged state, so the threshing switch 23 is in the on state, and the flag F3. F2
and Fl are not in the set state, so the solenoid Su is energized for a predetermined time T2, the reaping section 8 is placed in the upper retracted position, and the flag F1 indicating that the reaping section has been raised by turning on the reverse switch 26 is set. state. Therefore, when the threshing clutch is in the engaged state and the traveling device is in the reverse gear, the reaping section is in the upper retracted position, and there is no risk that the reaping section 8 will come into contact with the screen and be damaged due to the backward movement of the machine. Flag F1 is reset when the reverse switch is turned off.

In addition, when the manual lowering switch 31 or the manual raising switch 32 is turned on when the reaping part 8 is raised, priority is given to raising and lowering the reaping part 8 by this manual switch 31.32, and the manual switch 31.32 At the time either of them is turned on, the excitation of the solenoid Su is stopped, and thereafter the solenoid So or Sd is excited based on the manual switch 31, 32. If manual lifting is performed, the flag F1 is not set.

In addition, if the cutting height sensor 9 detects that the cutting part 8 is not yet in the upper retracted position after the cutting part 8 has been raised by turning on the threshing switch 23 and the reverse switch 26, When the lowering command switch 91 in the height sensor 9 is in the OFF state, the solenoid So is further excited for a predetermined time T2, and the reaping part 8
is set as the upper retraction position. When such a state is reached, a flag F2 indicating that the reaping section has been raised is set by turning off the lower command switch 91 on the cutting height sensor 9, and a flag F3, which will be described later, is set.
is in the reset state.

Even in this case, priority is given to lifting and lowering using the manual switches 31 and 32.
32, the flag F2 is not set. The flag F2 is reset when the reverse switch 26 is turned off. Further, even after the raising of the reaping section 8 due to the lowering command switch 91 of the sensor 9 being turned off is executed once, if the lowering command switch 91 is turned off, it is executed each time. Further, regardless of whether the threshing switch 23 is on or off, the process is executed with the reverse switch 26 on.

When the raising of the scraping part is executed by turning off the lowering command switch 91 and the flag F2 is in the cent state, the cutting part 8 cannot be raised even if the threshing switch 23 and the reverse switch 26 are turned on. do not have. Therefore, the reaping section 8
When the reaping section 8 is in the upper position, there is no risk that the reaping section 8 will be raised further, and the operator can work safely without feeling confused.

Even in this case, if the cutting section is not in the upper retracted position, the lowering command switch 9 of the cutting height sensor 9
1 is turned off, the reaping section 8 is raised.

When the reverse switch 26 is once turned off, the flag F
2, so if the reverse switch 26 and the threshing switch 23 are turned on afterwards, the reaping section 8 will be raised.

When the reaping latch that transmits or cuts off power to the reaping section 8 is placed in the power cutoff state, the reaping switch 24 is turned off, the solenoid Su is energized for a predetermined period of time T, and the reaping section is set at a sufficiently high level. It is assumed to be in the evacuation position. This predetermined time TI is longer than the rising time 12 when the reverse switch 26 is turned on. This is because when the reverse switch 26 is turned on, the culm is usually harvested in the same line, so there is no need to ensure that the reaping section is in the upper retracted position, whereas when the reaping switch 24 is turned off, This is because the reaping section 8 needs to be reliably placed in the - direction retracted position during normal turning. And in this case,
By turning off the reaping switch 24, the flag F3 indicating that the reaping section 8 has been raised is set to the 1-state. Therefore, for example, when finishing the reaping operation in the -stroke and turning to the next stroke, the reaping launch is put into the power cut-off state and the reaping section 8 is placed in the upper retracted position, which greatly simplifies the operation. be done. Furthermore, since the reaping section rise time is sufficiently long, the reaping section is reliably in the upper retracted position, and there is no risk of damaging the reaping section when turning.

When the reaping section 8 is raised by turning off the reaping switch 24 and the flag F3 is set, the threshing switch 2
There is no risk that the reaping section 8 will be raised even if the 3 and reverse switch 26 are turned on, but if the lowering command switch 91 of the cutting height sensor 9 is in the OFF state, the solenoid Su is energized for the predetermined time T2. , the reaping section 8 is raised. The flag F3 is reset when the reaping switch 24 is turned on when the reaping latch is in the power transmission state, or when the cutting section is raised by turning off the lowering command switch 91 of the cutting height sensor 9.

As detailed above, the present invention raises the reaping section for a predetermined period of time when the aircraft is operated to move backward;
After that, if the height of the reaping section from the ground is below a predetermined value, or if it becomes below a predetermined value, the reaping section is further raised for a predetermined period of time. Even if the amount is increased by a predetermined amount,
There is no risk that the height of the reaping section from the ground will fall below a predetermined value due to backward movement of the machine, thereby damaging the reaping section, the reaping height sensor, etc., and safety is significantly improved.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a left side view of the present invention, FIG. 2 is a diagram of the main electronic circuit, and FIG. 3 is a flowchart for explaining the present invention in detail. . 1... Traveling vehicle 3... Threshing section 8... Reaping section
9... Mowing height sensor 23... Threshing switch 24
... Reaping switch 25 ... Automatic switch 26.
...Reverse switch 29...Auto lamp 31...
Manual down switch 32...Manual up switch Sd
, Su...Solenoid patent Applicant: Yanmar Agricultural Machinery Co., Ltd. Agent Patent attorney: Noboru Kono

Claims (1)

[Claims] 1. In a harvester that was designed to raise and lower the reaping section to a predetermined cutting height based on the detection results of a cutting height sensor that detects the height of the reaping section above the ground, the operator operated the machine to move it backwards. If the height above the ground detected by the cutting height cents is below a predetermined amount, or if it becomes below a predetermined amount, the reaping portion is raised for a predetermined time. A harvesting machine characterized by: