JPH051229Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is a cutting height control device for a reaping and threshing machine, specifically, it is equipped with an input device for setting the cutting height, a cutting height position sensor, and a cutting switch. The present invention relates to a cutting height control device for a reaping and threshing machine, which includes an automatic control mechanism that automatically controls the height of a reaping section in the reaping and threshing machine when turned on, and a display device that displays the automatic control.

(Prior art) Conventionally, the cutting height control device of this seed reaping and threshing machine has an automatic control mechanism equipped with a cutting height setting input device and a cutting height position sensor, and is linked to an automatic operation switch and a threshing clutch. A threshing switch that operates the threshing machine is connected to a reaping switch that is linked to the reaping clutch, and the automatic control mechanism is activated by the ON operation of each of these switches, and the reaping section of the reaping threshing machine is automatically moved to the setting position set by the input device. The reaping and threshing machine performs the reaping and threshing work by moving the reaping and threshing machine to a certain position.

Further, an indicator lamp is connected to the automatic control mechanism, and when automatic control is performed by the automatic control mechanism, that is, when automatic control is performed by turning on each of the automatic operation switch, threshing switch, and reaping switch, the display lamp is displayed. A lamp is lit to notify the operator that automatic control is in progress.

(Problems to be Solved by the Invention) When the reaping and threshing machine performs reaping and threshing work, the automatic operation switch and the threshing switch are turned on, the reaping switch is turned off, and the automatic control mechanism is placed on automatic standby. However, in this case, the indicator lamp is not turned on due to the off operation of the reaping switch, but is kept in the non-lit state, so that the operator can be notified that the automatic standby state is in effect. There have been cases where the user forgets to turn on the reaping switch, activates the automatic control mechanism, and unexpectedly lowers the reaping section.

(Means for Solving the Problems) The present invention has been made to solve the above-mentioned problems, and when the reaping switch turns off, the threshing switch and the automatic operation switch When the display device is operated to display a display and the reaping switch is turned on, an automatic control mechanism is operated based on the input signal output from the cutting height setting input device and the detection signal output from the cutting height position sensor. An output control circuit was provided to control the output power.

(Function) When the automatic operation switch and the threshing switch are turned on, the reaping switch is turned off, and the automatic control mechanism is maintained in the automatic standby state, the display device, for example, the display lamp, is turned on, Informing the operator of the automatic standby state and erroneously turning on the reaping switch;
Eliminates the situation where the reaping part is lowered unexpectedly,
Further, when the automatic control mechanism is operated from the automatic standby state to perform reaping and threshing work, an output signal is output from the output control circuit by turning on the reaping switch to operate the automatic control mechanism. be.

(Example) The cutting height control device for a reaping and threshing machine according to the present invention will be described below with reference to the embodiments shown in the drawings.

The reaping and threshing machine shown in the drawings is provided with a traveling device 2 at the lower part of the machine body 1 and a threshing machine 3 at the upper part, and a reaping section equipped with a grain culm pulling device 4, a cutting blade 5, etc. at the front part of the machine body 1. 6 is a lifting device (not shown)
A pilot seat 7 and an operation column 8 are provided at the front of the machine body 1 at a side of the reaping section 6.

As the machine body 1 moves forward, the grain culm is raised by the grain culm pulling device 4 of the reaping section 6 and harvested by the cutting blade 5, and the harvested grain culm is transferred to the threshing section 3.
The grains are conveyed and supplied to the threshing section 3 where they are threshed.

Further, the reaping and threshing machine is provided with a reaping height control device, and the reaping height control device controls the lifting device to vertically adjust the reaping section 6.

The mowing height control device includes a setting input device 13 for setting the mowing height by the reaping section 6 and a mowing height position sensor 12, and includes a threshing switch SW-1 interlocked with a threshing clutch and an automatic operation switch.
Displays an automatic control mechanism S that automatically controls the cutting height of the reaping section 6 by turning on the reaping switch SW-2 and the reaping switch SW-3 linked to the reaping clutch, and the automatic control by the automatic control mechanism S. A display device consisting of an indicator lamp (hereinafter referred to as an indicator lamp)
It is equipped with L.

Furthermore, the threshing clutch and the reaping clutch are
It can be operated by one clutch lever 20 provided on the operating column 8, and the reaping clutch is not engaged until after the threshing clutch has been engaged.

In the cutting height control device as described above, when the reaping switch SW-3 is turned off, the threshing switch SW-1 and the automatic operation switch SW-2 are switched off.
The indicator lamp L lights up when the reaping switch SW-3 is turned on, and when the reaping switch SW-3 is turned on, the input signal output from the input device 13 and the detection output from the cutting height position sensor 12 are detected. An output control circuit is provided to operate the automatic control mechanism S based on a signal.

The output control circuit is formed as shown in FIG.
A setting input device 13 for setting the cutting height of the reaping section 6 is connected to the connection circuit connected via the threshing switch SW-1, and a cutting height position input device 13 is connected in parallel to the input device 13. The sensor 12 is connected to the output sides of the cutting height position sensor 12 and the setting input device 13, and the input signal from the input device 13 and the detection signal from the cutting height position sensor 12 are compared. A comparator 14 that outputs an output signal for operating the lifting device is connected to the mowing height position sensor 12 and the setting input device 1.
3 and the comparator 14 form an automatic control mechanism S for the reaping section 6.

Then, the automatic operation switch SW-2 is connected to the output side of the threshing switch SW-1, and
The indicator lamp L is connected to the output side of the automatic operation switch SW-2 and the output side of a NAND circuit 22, which will be described later, and the lamp is turned on by turning on the threshing switch SW-1 and the automatic operation switch SW-2. Turn on the threshing switch by turning on L.
When SW-1 and the automatic operation switch SW-2 are turned on to maintain the automatic control mechanism S in the automatic standby state, by lighting the lamp L, the automatic control mechanism S is placed in the automatic standby state. This was to inform the operator of the situation.

Setting input device 13 configuring the automatic control mechanism S
has three switching terminals at high, middle, and low positions, and by switching these switching terminals, the reaping section 6 can be set at a predetermined cutting height position.

The setting input device 13 has its switching piece always in contact with one of the switching terminals, and when the threshing switch SW-1 is turned on, the setting input device 13 outputs an output signal, and the The reaping section 6 is automatically controlled by the automatic control mechanism S at the same time as the automatic operation switch SW-2 and the reaping switch SW-3 are turned on.

The mowing height position sensor 12 constituting the automatic control mechanism S includes a detection section 10 having a sensor arm 9, and a drive section 11 that comes into contact with the sensor arm 9 to operate the sensor arm 9.
The detecting section 10 and the driving section 11 are interposed between the reaping section 6 and the machine body 1.

Specifically, as shown in detail in FIG. 3, the detecting section 10 is attached via a bracket 8b to the end surface of the step 8a provided on the operating column 8 on the machine body 1 side on the reaping section 6 side, and the detecting section 10 is The sensor arm 9 is supported in a freely swinging manner so that the sensor arm 9 extends toward the grain culm pulling device 4 side of the reaping section 6, and the lifting frame of the grain culm pulling device 4 facing the step 8a. 4a, the driving section 11 having an opening 11a for receiving the sensor arm 9 is attached.

In this way, when the reaping section 6 is raised and lowered, the sensor arm 9 is
By vertically swinging, the position of the reaping section 6 relative to the machine body 1, that is, the height of the reaping section 6 above the ground, is detected, and this detection signal is output from the detecting section 10 to a comparator 14, which will be described in detail later. Do as you please.

Further, the cutting height position sensor 12 has three first to third switches SW-4, SW-5, SW-6 as shown in FIG.
and each of these switches SW-4, SW-5,
SW-6 are connected in parallel, and the reaping section 6
When the switch reaches a predetermined high, middle, or low position, each switch SW-
4, SW-5 and SW-6 are operated respectively, and each of the switches SW-4 and SW
A smoothing circuit 15 is connected to the output side of the switches SW-5 and SW-6, and the output signals from the switches SW-4, SW-5 and SW-6 are sent to the comparator via the smoothing circuit 15. 14.

The comparator 14 includes three first to third AND circuits 16, 17, and 18, and each of the AND circuits 1
6, 17, and 18, one input terminal is connected to the high, middle, and low terminals of the setting input device 13, and the other input terminal is connected to the output side of each of the smoothing circuits 15. When signals are input from both the setting input device 13 and the cutting height position sensor 12 to the respective input terminals of the AND circuits 16, 17, 18, the AND circuits 16, 17 , 18, and the output sides of the AND circuits 16, 17, 18 are connected to an OR circuit 19 having three input terminals.

Further, a fourth AND circuit 20 having three input terminals is connected to the output side of the OR circuit 19, and the output side of the AND circuit 20 switches the lifting device to the lowering side to lower the reaping section 6. The AND circuits 16 and 1 of the setting input device 13 and the comparator 14 are connected to the first solenoid SoL-1.
OR circuit 2 is connected to each connection circuit connecting 7 and 18.
1 is connected, and a NAND circuit 22 having three input terminals is connected to the output side of this OR circuit 21, while
The output side of the NAND circuit 22 is connected to the indicator lamp L, and when the output is output from the NAND circuit 22, that is, when the reaping switch SW-3 is turned off,
The threshing switch SW-1 and automatic operation switch
When SW-2 is turned on, the indicator lamp L is turned on.

The cutting height control device includes the automatic control mechanism S.
A manual priority mechanism 23 and a manual priority holding mechanism 24 are provided, and a second solenoid SoL is provided on the output side thereof to switch the lifting device to the raising side and raise the reaping section 6. -2 is connected.

The manual priority mechanism 23 includes a manual switch SW-7 having two switching terminals, each of which is connected to each of the solenoids SoL-1 and SoL-2, and the manual switch SW-7 is connected to each of the solenoids SoL-1 and SoL-2. By switching any of the switching terminals, the automatic control by the automatic control mechanism S is interrupted, and each of the solenoids SoL-1 and SoL-2 is energized by manual operation in priority to the automatic control mechanism S, This is done as if the elevating device were activated.

Further, the holding mechanism 24 is configured to reset, set,
Flip-flop (RSFF) circuit 25 and this
It consists of first and second inverters 26 and 27 connected to the set position and reset position of the RSFF circuit 25, and the first inverter 26 is connected to the manual switch.
In addition to connecting to SW-7, the RSFF circuit 25
The output side of the NAND circuit 22 is connected to one input terminal of the NAND circuit 22, while the output side of the NAND circuit 22 and the
The middle of the RSFF circuit 25 is connected to the fourth AND circuit 20.
Connect to one input terminal of the

Further, the cutting height control device includes the cutting section 6.
There is provided a reaping clutch operation priority mechanism 28 that operates the lifting device in conjunction with the reaping clutch operation that turns on and off the power, and has priority over the automatic control mechanism S and the holding mechanism 24.

The priority mechanism 28 includes a first differentiation circuit 29 in the reaping switch SW-3 which is interlocked with the reaping clutch.
and connect the inverter 3 in parallel with the differentiating circuit 29.
0 and the second differentiating circuit 31, and also connecting the intermediate between the reaping switch SW-3 and the first differentiating circuit 29 to one input terminal of the fourth AND circuit 20, and one input terminal of the NAND circuit 22. A mono multi-circuit 32 is connected between the inverter 30 and the second differentiating circuit 31, respectively.
The output side of the RSFF circuit 25 is connected to one input terminal of the fifth AND circuit 33 via the AND circuit 33, and the output side of the RSFF circuit 25 is connected to the other input terminal of the AND circuit 33, and the output side of the AND circuit 33 is connected to the second solenoid. SoL−
It is configured by connecting to 2.

The NAND circuit 2 outputs to the indicator lamp L
As mentioned above, the three input terminals of No. 2 are connected to the OR circuit 21, the reaping switch SW-3, and the reaping switch SW-3.
When the RSFF circuits 25 are connected and input to all of the input terminals, the NAND circuit 2
2 to the indicator lamp L side to turn off the indicator lamp L, and when there is no input to any of the input terminals, the output is output from the NAND circuit 22 to the indicator lamp L side, and the indicator lamp L is turned off. The display lamp L is turned on by turning on the threshing switch SW-1 and the automatic operation switch SW-2.

Thus, when the automatic control device S is maintained in the automatic standby state, that is, when the threshing switch SW
-1 and automatic operation switch SW-2 are turned on and the reaping switch SW-3 is turned off, an output is output from the NAND circuit 22 to the display lamp L side, and the threshing switch SW-1
and the output from automatic operation switch SW-2,
It is as if the indicator lamp L is turned on.

In the output control circuit shown in FIG. 2, the automatic operation switch SW-2 is connected to the input/output device 13.
The threshing switch is connected to the side connected to the power supply E.
Although it is connected in series with SW-1, the indicator lamp L
It may be interposed in the connection line to the power source E of the lamp, and in short, it is sufficient that the lamp can be turned on when both the threshing switch SW-1 and the automatic operation switch SW-2 are turned on.

Next, the operating state of the cutting height control device will be explained.

First, during reaping and threshing work, when the automatic control mechanism S automatically adjusts the cutting height of the reaping section 6, the key switch SW-K, threshing switch SW-1, and automatic operation switch SW-2 are turned on. When each switch is turned on, an output is output to the indicator lamp L side, and in the setting input device 13, since the switching piece is always in contact with any one of the high, medium, and low switching terminals, the NAND signal is output from the OR circuit 21. Since the signal is output to one input terminal of the circuit 22 and no signal is output to the other input terminal due to the off operation of the reaping switch SW-3, the signal is output from the NAND circuit 22 to the indicator lamp L side, and therefore The display lamp L is turned on by the output signals from each of the switches and the output signal from the NAND circuit 22.

Then, the reaping switch SW-3 is turned on, and the setting input device 13 is selected from high, middle, and low positions, for example, the middle position and is switched to that position. Setting input device 1
A signal is output to one input terminal of the second AND circuit 17 corresponding to the middle position of 3, and the mowing height position sensor 12 indicates that the reaping section 6 is located at the middle position set by the setting input device 13. Until this happens, the second switch SW-5 of the cutting height position sensor 12 is kept in the on state, and a signal is output to the other input terminal of the second AND circuit 17. An output signal is output from the AND circuit 17, and the output signal is sent to the OR circuit 1.
9 and is input to one input terminal of the fourth AND circuit 20.

Further, due to the ON operation of the reaping switch SW-3, the reaping switch SW-3 is connected to the AND circuit 20.
It is input to the input terminal corresponding to the switch SW-3 of the holding mechanism 24.
The RSFF circuit 25 outputs a signal from the output side when the manual switch SW-7 is in an inactive state, that is, in a neutral state, and this signal is applied to the RSFF circuit of the AND circuit 20.
The signal is input to the input terminal corresponding to the circuit 25, that is, the signal is input to all the input terminals of the AND circuit 20. Therefore, the signal is output from the output side of the AND circuit 20, and the signal is input to the input terminal corresponding to the AND circuit 25. As a result, the first solenoid SoL-1 is energized, and the reaping section 6 is lowered from the upper retracted position via the lifting device.

When the reaping section 6 is lowered to the middle position set by the setting input device 13, the second switch SW-5 of the cutting height position sensor 12 is turned off, and accordingly, the second switch SW-5 of the cutting height position sensor 12 is turned off. circuit 1
7 is stopped, the operation of the lifting device by the first solenoid SoL-1 is stopped, and the reaping section 6 is set to the setting input terminal 13. Moved and held in position.

In addition, when the reaping and threshing machine turns to the edge of the field during the reaping and threshing work as described above,
The reaping clutch is disengaged to stop the reaping section 6. Then, the reaping switch SW-3 is turned off in conjunction with the reaping clutch, and accordingly, the fifth
A signal is output to one input terminal of the AND circuit 33, and a manual switch of the manual priority mechanism 23 is output.
SW-7 is in the inactive state, that is, in the neutral position,
A signal is output from the RSFF circuit 25 of the holding mechanism 24 to the other input terminal of the fifth AND circuit 33, and is therefore output from the AND circuit 33 to the second solenoid SoL-2.
2, the elevating device is switched to the upward side, and the reaping section 6 is elevated to the upper retracted position.

Furthermore, when an emergency situation occurs during the reaping and threshing work as described above, the manual priority mechanism 23
The manual switch SW-7 is operated to raise or lower, and then the switch SW-7
The output of signals from the RSFF circuit 25 to the RSFF circuit 25 is stopped, and the output of signals from the RSFF circuit 25 to the fourth and fifth AND circuits 20 and 33 is also stopped,
The operation of the lifting device by the automatic control mechanism S and the reaping clutch operation priority mechanism 28 is disabled,
In addition to this, the manual switch SW-
7, the first and second solenoid SoL-1,
SoL-2 is excited and the reaping section 6 is moved up and down.

(Effect of the invention) As explained above, in the cutting height control device for the reaping and threshing mechanism according to the invention, when the reaping switch is turned off, the display device is activated to display when the threshing switch and the automatic operation switch are turned on, and When the reaping switch is turned on, an output control circuit is provided that operates the automatic control mechanism based on the input signal output from the cutting height input device and the detection signal output from the cutting height position sensor. When the operating switch and the threshing switch are turned on and the reaping switch is turned off to maintain the automatic control mechanism in the automatic standby state, the display device is activated to indicate to the operator that the automatic standby state is present. Therefore, when the automatic control mechanism is in the automatic standby state as in the past, the situation where the reaping switch is turned on by mistake and the reaping unit is unexpectedly lowered can be eliminated, and safe reaping and threshing operations can be achieved. We were able to do this.

[Brief explanation of the drawing]

Fig. 1 is a front view of a reaping and threshing machine to which the cutting height control device of the present invention is applied, Fig. 2 is a control circuit diagram of the cutting height control device, and Fig. 3 is a drawing showing the cutting height position sensor. It is. 6... Reaping unit, 12... Cutting height position sensor, 13... Input device, S... Automatic control mechanism, L
...Indication lamp, SW-1...Threshing switch,
SW-2...Automatic operation switch, SW-3...Reaping switch.

Claims (1)

[Scope of utility model registration request] The cutting switch SW-3 includes an input device 13 for setting the cutting height and a cutting height position sensor 12.
The reaping height control device includes an automatic control mechanism S that automatically controls the height of the reaping section in the reaping and thresher by turning on the reaping switch SW-3, and a display device L that displays the automatic control. When the threshing switch SW-1 and the automatic operation switch SW-2 are turned on, the display device L is operated to display the information, and when the reaping switch SW-3 is turned on, the input device 13 outputs an output signal. A mowing height control device for a reaping and threshing machine, characterized in that an output control circuit is provided for operating the automatic control mechanism S based on an input signal to be input to the mowing height and a detection signal output from the mowing height position sensor 12. .