JPH0337380Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention uses automatic lifting and lowering of the reaping section for bending travel (swinging motion of the harvester regardless of the size of the radius of curvature), steering operations such as correcting the running direction, etc. This relates to a reaping harvester that is designed to stop.

[Prior art]

FIG. 1 is a schematic perspective view of a conventional reaping/harvesting machine. The reaping/harvesting machine 1 is equipped with a reaping section 2 that can be raised and lowered at the front, and a grass dividing plate 3 protrudes in front of the reaping section 2. The raising case 4 extends diagonally rearward and upward from the grass dividing board 3.
This is an outer cover of the lifting tine 5 that moves along the case 4. A height sensor 6 is provided at the bottom of the reaping section 2 to detect the distance between the reaping section and the ground surface, and the entire reaping section is automatically raised and lowered based on a rise or fall signal from this height sensor. The distance between the cutting part and the ground surface is controlled to be within a certain range (automatic mode). However, when the reaping and harvesting machine is steered outside the field, or when the cutting height needs to be changed suddenly, the reaping section must be raised and lowered manually by operating the manual switch (manual mode).

The reaping/harvesting machine 1 as described above is designed to be automatic so that it can be steered along the meandering path of the planted culm, or can turn in order to return to the field after leaving the field. It also has a manual steering function. For automatic steering operation as described above, a steering sensor is provided at the bottom of the reaping section 2 to detect the culm rays and perform automatic steering. Inside is the right sensor 51r
However, there is a left sensor 51l inside the left weeding side 3.
(not shown in FIG. 1) are provided respectively. The right sensor 51r is mainly used for steering control during mid-splitting, and the left sensor 51l is mainly used for steering control during row mowing, but depending on the model, the right sensor 51r
may not be provided.

[The problem that the idea aims to solve]

The height sensor 6 described above has a detection lever 16 that protrudes downward and has a tip bent backwards, and when this detection lever 16 contacts the ground surface and rotates, a built-in detection section is activated. However, when the reaping/harvesting machine 1 performs a steering operation, it crosses the culm rays and detects irregularities on the ground surface, so it is difficult to accurately detect the distance to the ground surface. This results in problems such as unnecessary or inaccurate automatic lifting and lowering operations, resulting in uneven stubble heights and poor riding comfort.

This problem also occurs when detecting the distance between the planted shell culm and the aircraft and automatically steering the aircraft according to the detected value, and when manually specifying the aircraft's steering direction. A similar problem occurs when a steering operation is performed.

In order to solve this problem, we have developed a mechanism that stops the operation of the automatic cutting height adjustment means that automatically raises and lowers the cutting section according to the signal from the height sensor during steering operation. A reaper with an automatic cutting height adjustment device disclosed in Japanese Patent No. 58-4124 is known.

However, in this conventional technology, the cutting section is kept at a constant height during steering operation, so it is not possible to avoid the problem of the cutting height being abnormally low or high due to changes in the topography. .

[Means to solve the problem]

The present invention focuses on this point, and the reaping/harvesting machine automatically raises and lowers at least during the turning operation, regardless of whether it is steered by the above-mentioned automatic steering operation or manual steering operation. The purpose of the present invention is to provide a reaping/harvesting machine which eliminates the above-mentioned problems by stopping the operation and enabling manual cutting height control during this period.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. FIG. 2 shows an example of a control circuit that automatically raises and lowers the reaping section 2 and controls the steering of the reaping and harvesting machine 1.

In FIG. 2, 7 is a lift control unit, 8 is a solenoid valve driven by this lift control unit 7, 10 is a manual lift switch, 11 is an automatic switch, 12 is a shelling switch that is linked with a clutch for the sheller, 13 is a fuse, 14 is a key switch, and 15 is a battery.

The height sensor 6 includes two photo interrupters 17u and 17d that are activated by the movement of a detection lever 16 (shown in the first figure) that comes into contact with the ground surface, and detects when the detection lever 16 is in contact with the ground.
6 is detected, the phototransistor 18u of the photointerrupter 17u is activated, and the rising signal is sent to the terminal 21 of the logic judgment circuit 20 via the smoothing circuit 19u.
If the voltage is too high, the phototransistor 18d operates and sends a falling signal to the terminal 21d of the logic judgment circuit 20 via the smoothing circuit 19d.

The smoothing circuits 19u and 19d are constructed of on-delay circuits, etc., and are used to prevent malfunctions caused by stubbles, small irregularities on the ground surface, etc., and are connected to the logic judgment circuit 20.

Manual rise switch 10 of manual rise switch 10
u and the manual lowering switch 10d are normally open contacts and are connected to the inverter 23 via diodes 22u, 22d, and each switch 10u,
The on/off signal 10d is inverted and transmitted to the S terminal of a reset flip-flop circuit (hereinafter abbreviated as RS.F.F. circuit) connected to the secondary side of the inverter 23. The R terminal of the reset flip-flop circuit is grounded via the automatic reset button 24, which is a normally open contact.
A terminal of the circuit is connected to a terminal 25 of the logic judgment circuit 20. In this RS・F・F circuit, when the S terminal input becomes L level, the Q terminal output becomes H level (set), and even if the S terminal input becomes H level afterwards, the Q terminal output maintains H level. ,
It operates so that the output of the Q terminal becomes L level (reset) only when the input of the R terminal becomes L level.When the Q terminal is at H level or L level, the terminal becomes L level or H level. ,
This is a terminal that sends out an inverted output with respect to the Q terminal.

The automatic return switch 24 is connected in parallel with one switch 26a of a reaping interlock switch 26, which is a double set of normally open contacts that interlock with a reaping clutch provided in the power source that drives the reaping unit 2. The switch 26b is inserted between one input terminal 27 of the logic judgment circuit 20 and ground.

The logic judgment circuit 20 is activated when the terminal 28 connected to the automatic switch 11 is turned on, and becomes automatic mode when the terminal 25 is at H level and the terminal 27 is at L level. In response to the signal, a drive signal for driving the solenoid valve 8 and a signal for lighting the pilot lamp 30 indicating automatic mode are output from the terminals 29u, 29d and 31. At other times, the terminals 29u, 29d and 31
Stop output from. Terminal 29 that outputs the rising signal
u is a switch circuit 35 consisting of transistors 33, 34, etc. via a mono-multivibrator 32;
It is connected to a lifting solenoid 36u that operates the hydraulic circuit of the solenoid valve 8 in the upward direction. Further, the terminal 29d that outputs the falling signal is connected to the transistor 37,
It is connected to the lowering solenoid 36d of the electromagnetic valve 8 via a switch circuit 39 consisting of 38 and the like.

The anode terminals of the diodes 22u and 22d connected to the manual up and down switches 10u and 10d are connected to the input lines of the switch circuits 35 and 39 via diodes 40 and 41, respectively.

45 is a steering control section, 46 is this steering control section 45
47 is a manual priority switch. The right sensor 51r has a normally closed contact 53rL and a normally open contact 53rR operated by a sensor arm 52r in contact with the culm ray, and the contact 5
3rL is connected to the logic judgment circuit 5 via the smoothing circuit 54r.
The contact 53rR is connected to the terminal 56rL of the logic judgment circuit 55, and the contact 53rR is connected to the terminal 56rR of the logic judgment circuit 55.
The left sensor 51l has a normally open contact 53lL and a normally closed contact 5 operated by a sensor arm (not shown).
3lR1 and normally open contact 53lR2, contact 53
lL is connected to the terminal 56lL of the logic judgment circuit 55, and the contact 53
lR1 is connected to terminal 56lR1 via smoothing circuit 54l1,
The contacts 53lR2 are respectively connected to terminals 56lR2 via smoothing circuits 54l2.

The left-turn output terminal 57l of the logic judgment circuit 55 is connected to a switch circuit 6 consisting of transistors 58, 59, etc.
0 to the left-turn solenoid 46l of the electromagnetic valve 46, and the right-turn output terminal 57r is connected to the right-turn solenoid 46r of the electromagnetic valve 46 via a switch circuit 63 consisting of transistors 61, 62, etc.

Further, the logic judgment circuit 55 is connected to the battery 15 via a selection switch 65 for "row cutting" - "off" - "intersection", and further a pulse generation circuit for generating pulses for driving the solenoid valve 46. 67 is connected to the selection switch 65 and each sensor 51r,
51l makes a logical judgment on the combination of on/off states of each contact and outputs to the terminal 57l or 57r,
The solenoid 46l or 46r of the electromagnetic valve 46 is driven.

The operating conditions of the logic judgment circuit 55 are such that the selection switch 65 outputs an output based on the signals from both the left and right sensors 51l and 51r in the case of row cutting, and outputs only based on the signal from the right sensor 51r in the case of middle cutting. The smoothing circuits 54r, 54l1,
54l2 smoothes the signals of each sensor 51r and 51l to prevent malfunctions caused by floating seedlings, etc.
The manual priority switch 47 is turned on by operating a side clutch lever (not shown), operates to stop the pulse generation circuit 67 via the smoothing circuit 66, and gives priority to manual operation. Note that 68 is a changeover switch that changes the pulse width for driving the solenoid valve 46.

Reference numeral 71 denotes an automatic lifting/lowering stop circuit according to the present invention, which is composed of an inverter 72, an OR circuit 73, and an off-delay 74. On the input side of the OR circuit 73, the output terminals 57l, 57r of the logic judgment circuit 55 and the inverter 72 are connected. A manual priority switch 47 is connected thereto. The output side of the OR circuit 73 is connected to switch circuits 75u and 75 inserted between the output circuit of the height sensor 6 and the ground via an off-delay 74.
Transistors 76u and 76d forming part d
connected to the base circuit. However, the delay time of the off-delay 74 can be set to 0, or the off-delay 74 itself can be omitted, if necessary.

The circuit of this embodiment has the above-mentioned configuration, and the automatic switch 11 is turned on and the reaping interlocking switch 2 is turned on.
6 is turned on, terminal 27 is set to L level, and terminal 25 is set to H level, the automatic mode is activated, and an output is output from terminal 29u (or terminal 29d) according to the signal from height sensor 6, and the solenoid valve 8 is raised. The solenoid 36u (or lowering solenoid 36d) is driven to raise (or lower) the reaping section 2.

Also, when the manual up switch 10u (or manual down switch 10d) is turned on, the S terminal of the RS・F・F circuit becomes L level and becomes manual mode, stopping the output from terminals 29u and 29d.
The reaping section 2 is raised and lowered exclusively by a manual signal transmitted from the manual up switch 10u (or manual down switch 10d) to the switch circuit 35 (or 39) via the diode 40 (or 41).

On the other hand, when the logic judgment circuit 55 of the steering control unit 45 outputs an output to the terminal 57l (or terminal 57r) in response to the operation of the left and right sensors 51l, 51r, the left turning solenoid 46l (or the right The turning solenoid 46r) is activated, the reaping and harvesting machine 1 is automatically steered, and the direction of movement is corrected.

In addition, by operating the side clutch lever and performing manual steering, the direction of travel can be corrected or turns unrelated to the culm rays can be performed. When the output for this automatic steering is output to the terminals 57l and 57r, or when the manual priority switch 47 is turned on by operating the side clutch lever, it is input to the OR circuit 73 of the automatic lift stop circuit 71. enters,
The output passes through the off-delay 74 to the switch circuit 7
5u, 75d, switch circuits 75u,
75d is turned on.

Therefore, the output of the height sensor 6 is grounded and is no longer input to the logic judgment circuit 20, and the output from the height sensor 6 is grounded.
Since no output is output from u, 29d, the automatic elevating operation by the elevating control section 7 is stopped.
The output of the automatic lift stop circuit 71 continues for a certain period of time even after the input to the OR circuit 73 disappears due to the off-delay 74, so the reaping harvester 1 finishes automatic steering control or manual steering operation and returns to the field. The automatic lifting operation will be resumed again within a short period of time before returning, and unnecessary or inaccurate automatic lifting operations will not occur, resulting in inconveniences such as uneven stubble heights. Even while such automatic lifting/lowering operations are blocked, manual lifting/lowering operates preferentially, and as described above, for example, the manual lifting switch 10u or the manual lowering switch 1
By pressing 0d, the reaping section 2 can be forcibly raised or lowered.

As shown above, after the OR circuit 73, the off-delay 7
4, automatic elevation will be stopped for a set time after the steering operation is completed, but such a delay function is not essential, and the delay time may be set to 0 or the off-delay 74 may be omitted. The above-mentioned object of the present invention can also be achieved even if the automatic lifting operation is stopped only during the steering operation.

[Effect of idea]

As mentioned above, the present invention provides a means for stopping the automatic lifting and lowering operation during the steering operation of the reaping and harvesting machine, and also enables manual lifting and lowering control even during this time, so that the reaping section does not move during the steering operation. This prevents unexpected automatic lifting and lowering, and even during such steering operations, the mowing section can be manually raised and lowered in response to changes in the ground surface, which prevents the cutting height from becoming abnormally low. This eliminates the inconvenience of high prices.

[Brief explanation of the drawing]

Figure 1 is a schematic perspective view of a conventional reaping harvester;
The figure is a control circuit diagram of an embodiment of the present invention. Explanation of symbols, 1... Reaping harvester, 2... Reaping section, 6
... Height sensor, 7... Lifting control unit, 45... Steering control unit, 47... Manual priority switch, 51l... Left sensor, 51r... Right sensor, 71... Automatic lifting stop circuit.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. Automatic mowing height adjustment means that detects the distance between the reaping section and the ground surface and automatically raises and lowers the reaping section according to the detected value, and manually raises and lowers the reaping section. A specified cutting height manual adjustment means is provided, and a steering direction automatic adjustment means is provided for detecting the distance between the aircraft body and the planted culm and automatically steering the aircraft according to the detected value, and the aircraft body. In a reaping harvester equipped with a steering direction manual adjustment means for manually specifying a steering direction, at least one of the steering direction automatic adjustment means or the steering direction manual adjustment means is actuated to perform a steering operation. is provided with lifting operation stopping means for stopping the automatic lifting operation by the automatic cutting height adjustment means when the cutting height automatic adjustment means is performed, and while the automatic lifting operation is stopped by the lifting operation stopping means, the cutting height is manually adjusted. A reaping harvester characterized in that it is provided with a control means that enables manual lifting and lowering operations using an adjustment means. 2. The lifting operation stopping means includes a delaying means for stopping the automatic lifting operation by the automatic cutting height adjustment means for a certain period of time after the steering operation is completed, and the control means automatically stops the automatic lifting operation by the delaying means during the steering operation. The cutting and harvesting device according to claim 1, which is a means for enabling manual lifting and lowering by the manual cutting height adjusting means while the lifting and lowering is stopped.