JPH07322739A - Elevating device for reaping working machine - Google Patents

Abstract

PURPOSE:To provide an elevating device for a reaping working machine capable of preventing an undesirable condition of a reaping operation part rising and falling against a will of an operator caused by operation mistake in spite of possession of merit by simple elevating operation of a reaping working part. CONSTITUTION:In an elevating device for a reaping working machine equipped with a hydraulic cylinder 9 for raising and dropping a reaping working part and a control device 18 for regulating the hydraulic cylinder 9, the elevating device is provided with a plant foot S0 for detecting whether the reaping working part is in a reaping working state or in a nonworking state and an automatic rise and fall switch SW for giving a rise and fall order to the control device 18 based on manual handling. The control device 18 is constituted in such a way that the hydraulic cylinder 9 is regulated so as to raise the reaping working part 5 to a target rise position within the lapse of a set time from detection of change from a reaping working state to a nonworking state by the plant foot sensor S0 when an order is given to the automatic rise and fall switch SW.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevating device for a mowing work machine provided with elevating operation means for driving and elevating a mowing work section, and control means for controlling the elevating operation means.

[0002]

2. Description of the Related Art In the lifting device for a reaping work machine described above, conventionally, the control means raises the reaping work unit to a target raising position each time a command from a raising / lowering command means is given based on a human operation. There is a configuration in which the elevating operation means is controlled so that the state of descending to the descending target position appears alternately. Moreover, such a control is configured to be executed regardless of the work status of the reaping work machine.

The above-mentioned structure is provided by the command of the lifting / lowering command means.
The reaper working unit can be automatically moved up and down to the target position. For example, compared to a configuration in which the elevating position is artificially adjusted based on the operation of the manual elevating adjustment means, the operation is less troublesome. This has been eliminated so that the raising and lowering operation of the mowing work unit can be easily performed.

[0004]

However, in the above-mentioned conventional configuration, for example, when the operator's body touches and the up / down instruction means is mistakenly operated while the cutting operation is being performed. Even then, the mowing work unit automatically moves up to the ascending target position, which may damage the crop to be mowed. Further, in the case of adopting a configuration in which the elevating and lowering command means and a manual type elevating and lowering means for artificially adjusting the elevating position are adopted, for example,
In the non-working state, after lowering the mowing work part to the target lowering position based on the operation of the elevating and lowering command means, and then raising the mowing work part to the desired position by the manual lifting adjustment means, Although there is a desire to lower the mowing work unit, there is a disadvantage that the mowing work unit rises to the target rising position against the intention of the operator, and there is room for improvement. The present invention has been made by paying attention to such a point, and the purpose thereof is that it has an advantage that the operation for raising and lowering the mowing work unit can be simply performed, but is caused by an operation error. An object of the present invention is to provide a lifting device for a reaping work machine that can prevent a problem that the reaping work unit goes up and down against the operator's intention.

[0005]

The features of the first invention are as follows:
In an elevating device for a mowing work machine, which is provided with an elevating operation means for driving the mowing work section to move up and down, and a control means for controlling the elevating operation section, the mowing work section is in a mowing work state or a non-working state. Mowing work state detecting means for detecting whether or not, and an elevating and lowering command means for giving an instruction for elevating and lowering to the control means based on human operation, the control means, the mowing work state detecting means, When the command is given by the elevating / lowering command means during the period from when it is detected that the reaping work state is switched to the non-working state until the set time elapses, the reaping work unit is raised to the ascending target position. In order to do so, it is configured to control the lifting operation means.

A characteristic configuration of the second invention is to specify a configuration suitable for carrying out the first invention, wherein the control means is
After the raising control of the mowing work unit is executed based on the instruction of the ascending / descending command unit, when a command is given by the ascending / descending command unit, the ascending / descending operation unit so as to descend the mowing work unit to the descending target position. Is configured to control.

A characteristic configuration of the third invention is to specify a configuration suitable for carrying out the first or second invention, wherein the reaping work state detecting means determines whether or not a reaping work crop exists in the reaping work section. It is configured to detect whether the cutting operation state or the non-working state is performed based on the determination.

[0008]

According to the characteristic construction of the first aspect of the invention, the mowing work state detecting means carries out mowing in a certain working stroke from the time when the mowing work state is switched to the non-working state until the set time elapses. By the time the set time has elapsed after the work is completed, the control is executed so as to raise the mowing work unit to the raising target position only when the raising / lowering instruction unit gives the instruction.

That is, since the raising operation is executed based on the command of the elevating / lowering command means only within a preset time after the end of the reaping work, during the reaping work or after a long non-working state, etc. In the above, the ascending operation based on the command of the ascending / descending command means is not performed, and it is possible to prevent an unexpected ascending operation due to an operation error.

According to the characterizing structure of the second invention, the following function is obtained in addition to the function of the characterizing structure of the first invention. Only after the raising operation based on the instruction of the lifting / lowering command means is executed, that is, after the cutting operation state is switched to the non-working state, and the cutting / working section is raised, the lifting / lowering command means commands. Since the descent control to the descent target position is executed based on the above, it is possible to prevent an unexpected descent operation due to an operation error.

According to the characteristic constitution of the third invention, in addition to the operation of the characteristic constitution of the first or second invention, there is the following operation.
The change from the reaping work state to the non-working state will be performed based on the judgment of the presence or absence of the reaping target crop in the reaping work unit, and it is sure that the elevating and lowering command means does not exist when the reaping work crop does not exist. Based on this, the ascending operation and the descending operation of the mowing work unit are performed.

[0012]

According to the characteristic construction of the first aspect of the invention, the reaping work section can be automatically raised to the raising target position on the basis of the operation of the raising / lowering command means, as compared with the case where the position is adjusted manually. Although it is possible to handle the raising operation of the mowing work unit with a simple operation, due to an operation error,
An elevating device for a mowing machine that can avoid the inconvenience of raising the mowing work part during the mowing work to tear and damage the crops to be mowed, or raising the mowing work part against the operator's will. We have been able to provide it.

According to the characterizing structure of the second invention, in addition to the effect of the characterizing structure of the first invention, there are the following effects. Due to an operation error, it is possible to avoid the inconvenience of lowering the mowing work unit against the operator's will so that the mowing work unit contacts the ridge and is damaged, or the crop to be mown is damaged. became.

According to the characterizing feature of the third invention, the following effect is obtained in addition to the effect of the characterizing feature of the first or second invention.
Since the raising / lowering operation of the mowing work unit is executed in the state where there is no crop to be cut, damage to the crop to be cut can be reliably prevented.

[0015]

Embodiments will be described below with reference to the drawings. Figure 6
A combine, which is an example of a reaper, is shown in FIG.
This combine has left and right crawler traveling devices 1R, 1L.
The traveling machine body 2 provided with is equipped with the threshing device 3, the operating unit 4, and the like, and the front part of the traveling machine body 2 is provided with the reaping work unit 5 which can be swung up and down around the horizontal axis X.

The reaping work section 5 includes a raising device 6 for raising the planted culms as crops to be trimmed in a standing posture, a clipper-type reaping device 7 for cutting the root of the culled stem, and a raised posture. And a vertical transport device 8 for transporting the stem culm to the starting end of the threshing feed chain 3a in the rear threshing device 3 while gradually changing its posture to a sideways posture, and a lifting hydraulic cylinder as a lifting operation means. 9 is configured to be freely driven up and down.

A stock origin sensor S0 (an example of a cutting operation state detecting means) for detecting whether or not there is a cutting culm to be conveyed is provided at the starting end portion of the vertical conveying device 8.

As shown in FIG. 1, in the traveling transmission system of the airframe, the power of the engine 10 is transmitted to the transmission case 12 via the transmission 11, and the left and right steering clutches 13R provided in the transmission case 12 are provided. , 13L, and power is supplied to the left and right crawler traveling devices 1R, 1L, respectively. Then, the transmission 11 is shifted based on the operation of a shift lever (not shown) to set the machine traveling speed, and the left and right steering clutches 13R, 13
It is configured to perform the steering operation of the airframe by the intermittent operation of L.

The operation structure of each of the steering clutches 13R and 13L will be described. Each steering clutch 13R, 13L
Are configured to be intermittently operated by the hydraulic cylinders 14R and 14L, respectively, and the hydraulic control of the hydraulic cylinders 14R and 14L is executed by switching the electromagnetic control valve 15, respectively. The operating lever 16 is provided in the operation unit 4 so as to be capable of swinging in the cross direction in the longitudinal direction and the lateral direction of the machine body.
The electromagnetic control valve 15 is configured to be switched based on the operation in the left-right direction. That is, FIG.
As shown in, the operating lever 1 is biased back to the neutral position.
When the steering switches 17R and 17L are turned on by swinging 6 in either the left or right direction, the control device 18 as a control means equipped with a microcomputer controls the electromagnetic control valve 15 to apply the control. Steering clutch 13R, 13L
Is configured to be turned to perform the turning traveling.

Next, the control configuration of the raising / lowering operation of the mowing work unit 5 will be described. The electromagnetic control valve 19 for the lifting hydraulic cylinder 9 is configured to be switched and controlled by the control device 18, and the lifting operation is performed based on the operation of the operation lever 16 in the front-rear direction. ing. That is, when the operation lever 16 is rocked in the longitudinal direction of the machine from the neutral position, the lowering switch 2
0 or the up switch 21 is turned on, and the control device 18
Is the electromagnetic control valve 1 while the lowering switch 20 is ON.
9 to output the control signal for lowering, and the rising switch 2
While 1 is ON, it is configured to output a rising control signal to the electromagnetic control valve 19. Therefore, the operating lever 16 corresponds to a manual raising / lowering command means, and by swinging the operating lever 16 back and forth, the raising / lowering position of the mowing work unit 5 can be manually adjusted to an arbitrary position.

On the upper surface of the grip portion 16a of the operating lever 16, an automatic raising / lowering switch S as a raising / lowering command means.
W is provided, and this automatic elevating switch SW is composed of a push button switch that can be operated by a finger with a thumb. Then, the control device 18 is in a state in which the stock source switch S0 is ON, that is, from when it is detected that the cutting operation state is turned to the OFF state (non-working state) until the set time elapses. In addition, when the automatic raising / lowering switch SW is operated, the mowing work unit 5 is automatically raised to the target raising position, and when the automatic raising / lowering switch SW is subsequently operated, it is automatically lowered to the lowering target position. Is configured to exercise control. The elevation swing fulcrum of the mowing work unit 5 is provided with a potentiometer-type elevation position sensor 22 for detecting a relative swing angle with respect to the traveling body, that is, a relative elevation position of the mowing work unit 5 relative to the machine body. .

The control flowcharts of FIGS. 3 and 4 and FIG.
The control operation will be described based on the control timing chart of FIG. When the stock source switch S0 is turned on and the mowing operation is being performed, the automatic raising / lowering control is stopped, and even if the automatic raising / lowering switch SW is operated, the automatic raising / lowering is not performed (steps 1 and 2). The detection value (elevation position) by 22 is read, and the average value (average cutting work height) for each set time is calculated and stored (step 3,
4). During the mowing operation, the operation lever 16
The height of the mowing work unit 5 is adjusted and maintained at an appropriate mowing work height by the ON operation of the lowering switch 20 or the raising switch 21 based on the forward and backward operations of.

Then, when the harvesting work in the work process is completed and the stock source switch S0 is switched from ON to OFF, a set time t (5 seconds) elapses from the switching time to automatic operation. When the elevating switch SW is operated, if the mowing work unit 5 is at or near the mowing work height, a raising control signal is output to the electromagnetic control valve 19 (steps 5 to 7). When the mowing work unit 5 is not at or near the mowing work height, the raising operation is not performed and the process returns to step 1. In this case, the raising / lowering operation of the mowing work unit 5 is performed by turning ON the raising switch 21 or the lowering switch 20.

Whether or not the mowing work unit 5 is at or near the mowing work height as the descending target position depends on the detected value of the ascending / descending position sensor 22 at that time and the average value (average cutting work height). If the deviation from) is within the set amount, it is determined that the height is at or near the cutting work height.

If the down switch 20 or the up switch 21 is not turned on and there is no command for manual lifting,
Based on the detection information of the up-and-down position sensor 22, if the mowing work unit 5 moves up to the upper limit position as the lift target position,
The output of the raising control signal is stopped to stop the raising operation (steps 8 to 10). After that, when the lowering switch 20 or the raising switch 21 is not turned on and the starting end of the next mowing work stroke is reached and the automatic raising / lowering switch SW is operated again, at that time, the mowing work unit 5 is at or near the upper limit position. If it is, the lowering control signal is output, and when it descends to the previous cutting work position stored as described above, the output of the lowering control signal is stopped and the lowering operation is stopped (steps 11 to 17). ). In step 12, if the mowing work unit 5 is not at or near the upper limit position, the descending operation is not performed and the process returns to step 1.

Whether or not the mowing work unit 5 is at or near the upper limit position is determined by the deviation between the detected value of the ascending / descending position sensor 22 at that time and the detected value of the ascending / descending position sensor 22 corresponding to the upper limit position. If it is below, it is determined that the position is at or near the upper limit position.

As described above, based on the operation of the automatic elevating switch SW by a simple operation of pushing with a finger,
The ascending operation of automatically rising from the mowing work position to the upper limit position and the descending operation of automatically descending from the upper limit position to the mowing work position are alternately performed. If it is not in the vicinity thereof, the automatic raising operation based on the operation of the automatic raising / lowering switch SW is not performed, and if the mowing work unit 5 is not at or near the upper limit position, the automatic lowering operation based on the operation of the automatic raising / lowering switch SW is not performed. By doing so, it is configured so as to prevent the mowing work unit 5 from automatically moving up and down in a direction contrary to the operator's intention when the cutting work unit 5 is at the intermediate position in the lifting range.

Further, if there is an ON operation of the lowering switch 20 or the raising switch 21 based on the back-and-forth swinging operation of the operating lever 16, that is, if there is a raising instruction for raising operation or a lowering instruction for lowering operation (in FIG. 5, Down switch 20
At the time point, the automatic lifting control is stopped, and a manual lifting operation based on the ON operation of the lowering switch 20 or the raising switch 21 is executed (steps 8, 11, 15, 18, 19).

As described above, after the automatic raising / lowering control is stopped by the manual raising / lowering operation based on the ON operation of the lowering switch 20 or the raising switch 21, the automatic raising / lowering switch S
Even if W is operated, the raising / lowering operation is not performed (see point Q in FIG. 5), the process returns to step 1, and the set time t elapses from the time when it is determined that the stock yuan switch S0 is switched from ON to OFF. When the automatic raising / lowering switch SW is operated before the operation, the automatic raising operation by the automatic raising / lowering control is executed. Therefore, the period from the ON operation of the lowering switch 20 or the raising switch 21 to the time when it is determined that the stock source switch S0 has been switched from ON to OFF is the automatic lifting prohibition period, and during this period, the automatic lifting is prohibited. The automatic lifting control based on the lifting command is stopped.

When the non-working state continues for a long time such as when traveling on the road, if the automatic raising / lowering switch SW is mistakenly operated, the mowing work unit 5 is automatically raised / lowered against the intention of the operator. In such a case, the control device 18 does not execute the automatic raising / lowering control based on the automatic raising / lowering switch SW by turning off the automatic on / off switch 23.

[Other Embodiments] (1) In the above embodiments, the automatic elevating switch SW as the elevating command means is provided in the grip portion 16a of the operation lever 16 so that the finger can be operated, but the invention is not limited to this. Alternatively, the operation lever 1 may be configured by a swing operation type switch.
It may be configured to be provided at a position different from that of 6. (2) In the above-described embodiment, the detection of the fact that the mowing work unit 5 has reached the target rising position or the target lowering position is detected by the ascending / descending position sensor 22 provided at the ascending / descending swing fulcrum of the mowing work unit. Although it is configured to be detected as height detection data, the target descent position is set as ground height data, the ground height of the mowing work unit is detected, and detection of reaching the target descent position is made to ground. The height detection value may be used for the determination. (3) In the above embodiment, since the stock origin sensor detects that the cutting work state has been switched to the non-working state,
Even if a command is given by the automatic elevating switch before the set time elapses, the automatic raising control is not executed unless the mowing work unit 5 is at or near the mowing work height. If a command is given by the automatic lifting switch before the time elapses, the automatic lifting control may be executed regardless of the height of the mowing work unit. (4) In the above embodiment, the automatic lowering operation based on the operation of the automatic raising / lowering switch is performed after the automatic raising operation is performed. However, the mowing work unit 5 is in the non-working state, and When it is detected that the elevator position sensor 22 is located at or near the upper limit position, the automatic lowering operation based on the command of the automatic raising / lowering switch SW is executed regardless of whether the automatic raising operation is executed. It may be configured to be performed. (5) In the above embodiment, the automatic raising control and the automatic lowering control are alternately executed based on the command of the automatic raising / lowering switch SW, but instead of this, based on the instruction of the automatic raising / lowering switch SW. Alternatively, only the automatic raising control may be executed, and the lowering operation may be performed based on the operation of the lowering switch 20. (6) As the working state detecting means of the reaping working unit 5,
Instead of the stock origin sensor S0, which determines whether stems exist, it is detected whether a transport stem exists in the threshing device, and it is in a working state or a non-working state based on the detection result. It may be configured to determine whether or not the mowing work unit is at a lower position than the set position, and a means for determining whether the mowing device is in a driving state. The working state detecting means may be configured so that if both of them are affirmative, it is possible to determine that the cutting operation state. (7) In the above embodiment, the hydraulic cylinder is used as the raising / lowering operation means of the mowing work unit 5, but an electric motor with a screw feed mechanism or the like may be used instead of the hydraulic cylinder. (8) In the above embodiment, the combine harvester was illustrated as an example, but the present invention is not limited to the combine harvester, but can be applied to other harvester working machines such as a straw harvester.

It should be noted that although reference numerals are given in the claims for facilitating the comparison with the drawings, the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a control block diagram.

FIG. 2 is a plan view showing an operation direction of an operation lever.

FIG. 3 is a control flowchart.

FIG. 4 is a control flowchart.

FIG. 5 is a control timing chart.

FIG. 6 is a side view of the front part of the combine.

[Explanation of symbols]

 5 Mowing work section 9 Elevating operation means 18 Control means S0 Mowing work state detecting means SW Elevating command means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tokusune Ozaki 64 Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Sakai Factory Co., Ltd. (72) Koji Yamagata 64, Ishizukita-machi, Sakai City, Osaka Prefecture In-house (72) Inventor Futoshi Ikeda 64 Ishizukita-cho, Sakai City, Osaka Prefecture Kubota Sakai Factory

Claims (3)

[Claims] 1. A raising and lowering device for a mowing work machine, comprising: an elevating and lowering operation means (9) for driving and elevating the mowing work section (5); and a control means (18) for controlling the elevating and lowering operation means (9). A reaping work state detecting means (S0) for detecting whether the reaping work unit (5) is in a reaping work state or a non-working state.
And an elevating / lowering command means (SW) for giving an elevating / lowering command to the control means (18) based on a human operation, and the control means (18) comprises the reaping work state detecting means (S0). ) Detects that it has switched from the reaping work state to the non-working state,
The elevating / lowering command means (S
(W) is an elevating device for a mowing work machine configured to control the elevating operation means (9) so as to elevate the mowing work part (5) to a target raising position when the command is given by W). 2. The control means (18) carries out a command by the lift command means (SW) after executing the lifting control of the reaping work section (5) based on the command of the lift command means (9). The raising / lowering device for a reaping work machine according to claim 1, wherein the raising / lowering operation means (8) is controlled so as to lower the reaping work section (5) to a lowering target position. 3. The reaping work state detecting means (S0) comprises:
The reaping work machine according to claim 1 or 2, wherein the reaping work unit (5) is configured to detect whether a reaping work state or a non-working state is present based on a judgment as to whether or not a crop subject crop is present. Lifting device.