JPS60118113A - 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.

Harvesting machines usually detect the height of the cutting section above the ground,
The machine is equipped with an automatic cutting height adjustment device that raises and lowers the cutting section based on the detection results to achieve a predetermined cutting height. In such a harvester, the reaping section is close to the screen during work, so when the machine is moved backwards, there is a risk that the reaping section will come into contact with the field surface and be damaged.

For this reason, when the machine is operated to move backward during work, it is conceivable to raise the reaping part by a predetermined amount. Additionally, when the reaping latch is placed in a power cutoff state, the reaping section may be raised a predetermined amount to improve operability and safety; however, when the reaping latch has both functions, the power cutoff is If the reaping section is raised by a predetermined amount and then operated to move backward, the reaping section will be raised further, which may lead to a dangerous situation.

The present invention has been made in view of the above circumstances, and after the threshing clutch is in the power-off state and the reaping section is raised, the reaping section is not raised even when the machine is operated in reverse, thereby improving safety. The purpose is to provide an improved harvesting machine.

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 plate 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 9a slides on the screen and rotates up and down, a lowering command switch 91 in the sensor box 9b is activated. A lift command switch 92 (see FIG. 2) is selectively operated to control the hydraulic cylinder 4 to raise and lower the reaping section to a predetermined cutting height.

FIG. 2 is a diagram of the control electronic circuit 173 in the machine of the present invention.

In the figure, 21 is the bar 7 whose negative pole is connected to body ground.
The positive terminal thereof is connected to each switch and a control section 40, which will be described later, via a key switch 22.

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 section 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 mowing height control switch that controls the elevation of the reaping section. The automatic cutting height switch 25 is turned on when automatic cutting is performed based on the detection result of the cutting height sensor 9, the reverse switch 26 is turned on when the traveling device is set to reverse gear, and the cutting height sensor 9 is turned on. A lowering 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 lowering switch 31 is turned on when lowering the reaping section when manually adjusting the cutting height. Similarly, manual lift switches 32 are connected to each other, and these switches are collectively connected to the key switch 22.

Each output terminal of the control section 40 includes the above-mentioned solenoid Sd for lowering the reaping section and solenoid S for raising the reaping section.

and an automatic lamp 29 are connected, respectively.

The operation of the apparatus of the present invention constructed as described above will be explained based on the flowchart of FIG. When the key switch 22 is turned on, the control section 40 enters a controllable state, and the automatic switch 25 is turned on to automatically adjust the cutting height. When the automatic switch 25 is turned off, the cutting height can be manually adjusted using the manual switches 31 and 32. Further, when the reaping latch and the threshing clutch are brought into a power transmitting state, the reaping switch 25 and the threshing switch 23 are turned on, and the reaping section 8 and the threshing section 3 are driven to become ready for reaping and threshing. When the machine is moved forward to perform reaping and threshing operations, the reaping section 8 enters a so-called automatic mode in which it is raised and lowered in accordance with the status of the lower command switch 91 and the higher command switch 92 in the cutting height sensor 9. When the automatic lamp 29 is turned on and the height of the reaping section 8 above the ground is below (or above) a predetermined value, the descending (or ascending) command switch 91 (or 92) is turned on, and the solenoid Sd (or Su) is energized. Then, the piston rod in the hydraulic cylinder 4 retreats (or advances), and the reaping section 8 descends (or ascends). Even in this automatic mode, priority is given to lifting and lowering using the manual switches 31 and 32, and the automatic lamp 29 is clear during this manual operation.

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. 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 Su or Sd is energized based on the manual switch 31, 32. The flag F1 is not set when manual lifting is performed.

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 Su is further excited for a predetermined time 'r2, and the reaping part 8 is brought to the upper retracted position. When such a state occurs, the cutting height sensor 9 lowers
When the command switch 91 is turned off, the flag F2 indicating that the reaping section has been raised is set to the cent state, and the flag F2, which will be described later, is set to the cent state.
3 is set to the reset state.

Even in this case, priority is given to lifting and lowering using the manual switches 31 and 32.
If the W drop is performed by No. 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 reaping section is raised by the O-Z of the lowering command switch 91 and the flag F2 is set, the reaping section 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
Since 2 is reset, the reverse switch 26 is set to 1 &
When the threshing switch 23 is turned on, the reaping section 8 is raised.

When the reaping latch that transmits or disconnects 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 iff T 1, and the reaping section is fully powered. The retracted position is on the high side. This predetermined time T is longer than the rise time 1'' caused by turning on the reverse switch 26 described above. This is because when the reverse switch 2 [; is turned on, the culms are normally harvested in the same line, so there is no need to ensure that the reaping section is retracted upwards, whereas the reaping switch 24 is turned off, it is usually during turning, and this is because it is necessary to ensure that the reaping section 8 is in the child's retracted position. In this case, when the reaping switch 24 is turned off, the flag F3 indicating that the reaping section 8 has been raised is set to the seventh 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.

In the cent state of the flag F3 in which the reaping section 8 is raised due to the reaping switch 24 being turned off, 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 reaping section is raised by turning off the lowering command switch 91 of the reaping height sensor 9.

As detailed above, the present invention raises the reaping section for a predetermined period of time when the reaping latch is placed in the power cutoff state, or when the threshing clutch is placed in the power transmitting state and operated to move the machine backwards. This prevents the reaping section from rising even when the threshing crank is in the power transmission state and the machine is in the reverse operation state after the reaping section has been raised by the former, so that the reaping section does not end up in an unexpected upward position. The present invention has excellent effects such as there is no risk of the operator feeling confused and there is no risk of damage to the reaping section even if the machine moves backward.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention; FIG. 1 is a left side view of the machine of the present invention, FIG. 2 is a diagram of its main electronic circuit, and FIG. 3 is a flowchart for explaining the present invention in detail. be. 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: Tonmar Agricultural Machinery Co., Ltd. Representative Patent attorney: Noboru Kono

Claims (1)

[Claims] 1. In a harvester that detects the height of the reaping section above the ground and raises and lowers the reaping section to a predetermined height above the ground, when the reaping latch is set to the power cutoff state, or when the threshing clutch is set to the power transmission state, When the aircraft is operated to move backward, the reaping section is raised by 1 for a predetermined period of time, and when the latter case occurs later, the reaping section is raised by 1 for a predetermined period of time. A harvesting machine characterized by prohibiting the upper part from rising.