JP2001286208A - Paddy implement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely raise and lower an implement unit while preventing malfunction without impairing an excellent aspect enabling the raising and lowering of the implement unit through simple operations and to improve operability in the on-operation of a clutch mechanism for transmitting power to the implemental unit in a paddy implement. SOLUTION: A control instrument 21 capable of being artificially operated in such a way as to take both of an upward-operated posture U and a downward-operated posture D is set up below a steering handle 20. The instrument 21 is arranged in such a way that ascent control for raising the implemental unit through an actuator up to a predetermined height is performed by directing the instrument 21 toward the upward-operated posture U and descent control for lowering the implemental unit through an actuator down to a working height is performed by directing the instrument 21 toward the downward- operated posture D, and the on-operation of the clutch mechanism for transmitting power to the implement unit is also performed by directing the instrument 21 toward the downward-operated posture D.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ascending control in which a working device is connected to a traveling machine body by an actuator so as to be movable up and down, and the working device is raised to a predetermined height by an actuator.
Further, the present invention relates to a paddy field working machine configured to perform a descent control for lowering a working device to a working height by an actuator.

[0002]

2. Description of the Related Art A paddy working machine having the above-mentioned construction is disclosed in Japanese Patent Application Laid-Open No. Hei 6-237612. In the structure disclosed in the above publication, a state in which a seedling planting device as a working device is forcibly raised to a maximum rising position by operating a rocking lever type raising / lowering operation switch arranged in a position near a steering handle; Is configured to be freely switchable to a state of descending the ground.

[0003]

The structure described in the prior art is constructed so that the raising and lowering of the seedling planting device can be performed by operating the lifting lever at the side position of the driver's seat. A dedicated lifting operation switch for forcibly raising and lowering the ground is provided. Thus, at the start of turning on the headland, the steering operation can be performed while the forcible raising of the seedling planting device is started by operating the elevating operation switch, and at the end of turning on the headland, the operation of the elevating operation switch is performed. The steering operation can be performed while starting the descent of the planting device. Therefore, when performing the raising and lowering of the seedling planting apparatus, it is not necessary to perform the operation of the fixed stroke like the raising and lowering lever, and it has a good surface that the operation is simple and the working efficiency can be improved. I have.

[0004] However, as in the structure described in the prior art, when the raising and lowering of the seedling planting apparatus is forcibly raised and lowered by repeatedly operating the raising and lowering operation switch, the operation of the raising and lowering operation switch of the seedling planting apparatus is performed. Is there a forced ascent,
It may be difficult to determine whether the seedling planting apparatus is going down. In particular, when the seedling planting device is connected to the rear portion of the traveling machine body, it may be difficult for an operator in a working posture to recognize whether the seedling planting device is in the ascending position or the descending position. For example, at the end of a turn on the headland, despite the fact that the seedling planting device has descended and touched the ground, the worker forgets that the seedling planting device descended and operates the raising / lowering operation switch again, and There is room for improvement because the planting device may be forced up. SUMMARY OF THE INVENTION It is an object of the present invention to provide a paddy working machine that can reliably move up and down a working device while suppressing erroneous operation without impairing a favorable aspect that the working device can be raised and lowered by a simple operation.

[0005]

Means for Solving the Problems [1] A feature of the present invention is that a paddy working machine is configured as follows. A working device is connected to the traveling body by an actuator so as to be able to move up and down by an actuator, and a clutch mechanism that transmits power to the working device is provided. In addition to the above, when the operation tool is moved to the upper operation position, the working device is raised to a predetermined height by the actuator, and the operation device is moved to the lower operation position, and the operation device is lowered to the working height by the actuator. The lowering control is performed such that the clutch mechanism is engaged by an operation of the operating tool to the lower operation posture.

[2] In the configuration of [1], the clutch mechanism is configured to be disengaged in accordance with the ascent control.

[3] In the configuration of the above item [1] or [2], a neutral posture is provided between the upper and lower operation postures, and the operating tool is biased to the neutral posture.

[0008]

According to the first aspect of the present invention, when the operating tool is operated in the upward operation posture, the ascending control for raising the working device to a predetermined height is performed, and the operating tool is moved to the downward operating posture. When operated, a lowering control for lowering the working device to the working height is performed.

As described above, according to the first aspect of the present invention, the operating direction of the operating tool coincides with the vertical direction of the working device.
Erroneous operation hardly occurs. For example, after the operating tool is operated to the lower operation posture and the lowering control of the working device is performed, even if the operating device is erroneously operated to the lower operating posture, the working device moves in the operating direction of the operating device ( Since the downward direction is the same as the downward operation posture), the working device does not rise.

[0010]

According to the first aspect of the present invention, there is provided a paddy field working machine capable of reliably moving up and down the working device while suppressing erroneous operation without impairing a favorable surface that the working device can be raised and lowered by a simple operation. Reasonably configured.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a traveling body 3 having a driven front wheel 1 and a driven rear wheel 2 that are operated by steering.
The engine 4 is mounted at the front of the vehicle body 3, and a hydrostatic continuously variable transmission 5 and a transmission case 6 to which the power of the engine 4 is transmitted are arranged at the rear part of the vehicle body 3, and the vehicle is driven at the center of the vehicle body 3 The seat 7 is arranged. At the rear end of the traveling body 3,
A seedling planting device An as an example of the working device A is connected via a link mechanism 9 driven up and down by a lifting cylinder 8 as an example of an actuator to constitute a rice transplanter as an example of a paddy working machine. I have.

As shown in FIG. 1, on the right side of the driver's seat 7, there is provided an elevating lever 10 for controlling the elevating and lowering of the seedling planting device An and for engaging and disengaging the planting clutch C as a clutch mechanism. Gearshift lever 1 on the left side of driver's seat 7
1 is provided. Planting clutch C is mission case 6
Only when the transmission shaft 12 for transmitting power from the transmission case 6 to the seedling planting device An is in a fixed rotation phase, the disengaging operation of the planting clutch C is permitted, and the planting arm 17 is provided. The power is shut off in a posture avoiding contact with the field scene.

As shown in FIG. 1, the seedling planting device An places a mat-shaped seedling W thereon, and the seedling mounting table 13 in which the upper end is inclined forward of the traveling body 3, and the power of the transmission shaft 12. , A rotary case 16 rotated by power transmitted from the transmission case 14 via the chain case 15, a pair of planting arms 17 provided on the rotary case 16, and a plurality of leveling floats 18. It is configured for a plurality of rows, and has line markers 25 at right and left side positions.

As shown in FIG. 1, a switching lever 21 as an operating tool is provided on the right side of the post portion of the steering handle 20 at a position in front of the driver's seat 7. As shown in FIG. 2, the switching lever 21 is urged by a spring (not shown) so as to return to a substantially horizontal neutral posture N, and the end of the switching lever 21 is referred to the neutral posture N as a reference. Operating posture U in which the portion is displaced upward, lower operating posture D in which the end of the switching lever 21 is displaced downward, switching lever 21
Left marker operating posture L with its end displaced backward, and right marker operating posture R with its end of switching lever 21 displaced forward
The switching lever 21 is configured to be swingable in the cross direction about the base end of the switching lever 21 so as to be freely operable.

As shown in FIG. 3, the elevating lever 10 is configured to be operated along a path formed in the guide 22, and when the elevating lever 10 is operated forward from the lowered position, the seedling plant An Is lowered and the raising / lowering lever 10 is operated backward from the raised position, so that the seedling plant An is raised. When the raising / lowering lever 10 is operated to the neutral position, the control system is linked so as to maintain the seedling planting device An at that level, and when the raising / lowering lever 10 is operated to the ON position, the planting clutch C is engaged and the seedling is planted. Automatic raising and lowering control for maintaining a predetermined field height in a state where the leveling float 18 provided in the attaching device An is in contact with the ground is performed, and when the lifting lever 10 is operated to the off position, the planting clutch C is disengaged. Lift lever 10
Is moved to the automatic position, the operation of the switching lever 21 allows the raising control and the lowering control of the seedling planting device An, and at the same time, the planting clutch C during the raising control of the seedling planting device An.
Is automatically turned off.

As shown in FIG. 4, the right and left line markers 25 are supported by a frame portion 26 of the seedling plant An so as to be swingable around a support shaft 27 in a front-rear posture, and the right and left line markers are provided. A spring 28 for holding the marker 25 in the acting posture in the falling state, and a right and left line marker 25 for holding the right and left line markers 25 in the stowed storage posture against the urging force of the spring 28. The swing type lock member 30 that engages with the pin 29 is provided. A wire 31 for operating the right and left line markers 25 to the stored posture by using the change in the relative posture between the member at the rear end position of the link mechanism 9 and the seedling planting device An when the seedling planting device An is raised. , Locking member 30
Is provided with a pair of left and right electromagnetic solenoids 32 for operating the lock in the unlocked posture.

As shown in FIG. 1, a control device 33 having a microprocessor is disposed below the driver's seat 7. As shown in FIG. 5, the control device 33 includes a lever sensor 34 for detecting the operation position of the elevating lever 10, an automatic switch 35 for detecting that the elevating lever 10 has been operated to the automatic position, and an upward operation posture U of the switching lever 21. Switch 36 for detecting the operation of the switching lever 21 to the lower operation posture D, the left marker switch 38 for detecting the operation of the switching lever 21 to the left marker operation posture L, the switching lever 21 right marker operation posture R
1 is a right marker switch 39 for detecting the operation of the link mechanism 9, and a potentiometer type link sensor 40 provided at the base end of the link mechanism 9 for measuring the height of the seedling plant An with respect to the body (FIG. 1).
), A potentiometer-type control sensitivity setting unit 41 for setting the automatic raising / lowering control sensitivity of the seedling planting device An, and a potentiometer for measuring the inclination posture of the front part of the leveling float 18 at the center on the right and left among the leveling floats 18 in the vertical direction. The signal of the type float sensor 42 is input.

As shown in FIG. 5, among the leveling floats 18, the right and left centering leveling floats 18 are supported by a seedling planting device An such that the rear portion is swingable around an axis 43 in a horizontal posture, and the front portion is a bent type. Are supported by the seedling-planting device An through the link pieces 44. Thereby, the vertical swing amount of the front part of the leveling float 18 at the left and right center of the leveling float 18 is measured by the float sensor 42.

As shown in FIG. 5, the control device 33 comprises a solenoid valve 45 for controlling the lifting cylinder 8 and a relay 4 for controlling an electric motor 46 for engaging and disengaging the planting clutch C.
7. An output system for the electromagnetic solenoid 32 for the right and left line markers 25 is provided. In the state where the lifting lever 10 is operated to the on position, the signal of the float sensor 42 is fed back so that the swing posture around the axis 43 of the leveling float 18 set by the control sensitivity setting device 41 is maintained. By performing the raising and lowering control of the seedling planting apparatus An, the automatic raising and lowering control for maintaining a predetermined field height is performed.
The control device 33 is configured to perform raising and lowering control of the seedling planting device An, operation of the right and left line markers 25, and engagement operation of the planting clutch C by operating the switching lever 21. The operation will be described based on the flowchart shown in FIG.

As shown in FIG. 6, when it is determined based on a signal from the automatic switch 35 that the elevating lever 10 has been operated to the automatic position, the ascending switch 36 and the descending switch 3 are turned on.
7. The posture of the switching lever 21 is determined based on signals from the left marker switch 38 and the right marker switch 39. When the switching lever 21 is operated to the upper operation posture U, the raising control for raising the seedling planting device An based on the signal of the float sensor 42 only when the seedling planting device An is at the working height is performed. And the flag is set to “0” (#
101 to # 105 steps). In the raising control of the seedling planting apparatus An, the operation of the solenoid valve 45 supplies pressure oil to the lifting cylinder 8 to raise the seedling planting apparatus An, and the link sensor 40
When it is determined based on this signal that the height of the body of the seedling planting apparatus An has reached the upper limit height as a preset limit, the raising control of the seedling planting apparatus An ends.

When the switching lever 21 is operated in the downward operation posture D, the timer is operated and the flag is set to "0".
Only when is at the upper limit height, the descending control for lowering the seedling planting apparatus An is performed, and the flag is set to "1" (steps # 106 to # 111). In the descending control of the seedling planting apparatus An, when it is determined from the count result of the timer that the switching lever 21 has been continuously operated in the downward operation posture D for 3 seconds or more, it is determined that the leveling float 18 has touched the ground. At the timing detected by the signal of the sensor 42, the planting clutch C is engaged and operated (# 112, # 1).
13 steps).

In the descending control of the seedling planting device An, the solenoid valve 4
When the seedling planting device An descends by draining the oil from the lifting cylinder 8 by the operation of 5, the leveling float 18 descends to the working height where the leveling float 18 contacts the field scene based on the signal of the float sensor 42. Then, the lowering control of the seedling plant An is ended. # 104 for raising the seedling plant An
Step # 11 for controlling the lowering of the seedling planting apparatus An
The control means E is constituted by 0 steps.

When the switching lever 21 is again operated to the lower operation position D after the switch lever 21 is operated to the lower operation position D and the lowering control of the seedling planting apparatus An is started, the value of the flag is changed. The operation is discriminated, and at the timing of the operation of the switching lever 21 to the lower operation posture D, the planting clutch C is engaged and operated (step # 114). The # 114 step constitutes the clutch operating means F.

When the switching lever 21 is operated to the left marker operating posture L or the right marker operating posture R, the electromagnetic solenoid 32 on the side corresponding to the operation is operated, and the line marker 25 on the side corresponding to the operation is actuated. Control for operating the posture is performed (# 115, # 116 steps). Lift lever 1
When 0 is operated to a position other than the automatic position, control is performed to set the flag to the initial value "0" (step # 117). By the step # 116, a marker operating means G for operating the right and left line markers 25 to the action posture is configured.

When the seedling planting device An is raised, the right or left line marker 25 in the operating posture is operated to stand up by the tension of the wire 31, and is held in the retracted posture by the lock member 30. If the seedling placement apparatus An is lowered when the lock member 30 is operated to the unlocked position, the line marker 25 on the side where the lock member 30 is operated to the unlocked position is operated to the operating position. On the other hand, when the seedling plant An is not completely lowered, the line marker 25 is operated to an appropriate action posture when the seedling plant An is completely lowered.

[Another embodiment] The present invention can be applied to a paddy field working machine in which, besides the seedling planting apparatus An, a grooving device for forming a groove in a field scene is connected to the rear end of the traveling machine 3 so as to be able to move up and down. It is possible. In the case where the work is performed in such a manner as to contact the field scene, the height at which the work contacts the field scene is the work height.
It is also possible to configure so that the height when the working device is raised and controlled by the operating tool can be arbitrarily changed.

The present invention is not limited to the above-described embodiment.
As shown in (1), instead of the seedling planting device An at the rear end of the traveling machine body 3, it is also possible to apply a control device Ab as an example of the working device A that is connected so as to be able to move up and down. Pest control machine A
b is provided with a tank 56 for storing a liquid drug at the top,
An arm-shaped nozzle 57 extending laterally is provided at the rear, and the medicine in the tank 56 is
Is provided with a unit 58 for sending to the user. Pest control machine A
When the control device b is connected to the traveling body 3, a position control for raising and lowering the control device Ab to the body height corresponding to the operation position of the lifting lever 10 is configured to be performed.
The raising and lowering control of the pest control machine Ab is performed by the operation in the up and down direction of 1, and the control operation at the time of raising and lowering is performed according to the flowchart shown in FIG.

First, a flag is set to an initial value "0",
After the state of the flag is determined, the operation amount of the elevating lever 10 is measured based on the signal of the lever sensor 34, and the control device Ab is moved to the anti-machine height corresponding to the signal of the lever sensor 34.
Position control is performed while feeding back the signal of the link sensor 40 so as to move up and down (# 2).
01 to # 203 steps). In the position control state,
When the switching lever 21 is operated to the upward operation posture U, the signal of the link sensor 40 is stored in a memory or the like, and the ascending control for raising the control device Ab to the upper limit height is performed. (# 204 to # 20)
7 steps). In this case, the height of the body of the control device Ab set by the elevating lever 10 is the working height, and the upper limit height is a predetermined height that is set in advance.

When the switching lever 21 is operated to the lower operation posture D with the control device Ab raised to the upper limit height, the control device Ab is lowered to the working height stored in the memory. The control is performed, the flag is returned to the initial value “0”, and the operation for enabling the position control is repeatedly performed until the operation is reset. Although the operation of the clutch mechanism C is not described in the flowchart shown in FIG. 8, the switching operation of the clutch mechanism C is performed by lowering the switching lever 21 after the lowering control of the control device Ab is performed as in the above-described embodiment. The disengagement operation of the clutch mechanism C is performed by operating to the operation posture D, and is performed simultaneously with the raising control of the control device Ab when the switching lever 21 is operated to the upper operation posture U.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is an overall side view of a rice transplanter.

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

FIG. 3 is a plan view showing a path of a lifting lever.

FIG. 4 is a rear view showing an operation system of right and left line markers.

FIG. 5 is a block diagram showing a control system.

FIG. 6 shows a flowchart of a control operation.

FIG. 7 is a side view of a rear portion of a traveling body connected with a control device in another embodiment.

FIG. 8 is a diagram showing a flowchart of a control operation in another embodiment.

[Explanation of symbols]

 3 Traveling body 8 Actuator 20 Steering handle 21 Operating tool A Working device C Clutch mechanism N Neutral posture U Upper operation posture D Lower operation posture

Claims (3)

[Claims] An operating device (A) is connected to a traveling body (3) by an actuator (8) so as to be able to move up and down, and a clutch mechanism (C) for transmitting power to the operating device (A) is provided. An operation tool (21) that is artificially operated in a posture (U) and a lower operation posture (D) is provided below the steering handle (20), and the operation tool (21) is moved to an upper operation posture (U). The operation (A) causes the actuator (8) to raise the working device (A) to a predetermined height, and the operating device (A) is moved to the lower operating posture (D) to perform the lifting operation. ) Is lowered by an actuator (8) to a working height, and the clutch mechanism (C) is turned on by operating the operating tool (21) in a downward operating posture (D). operation Paddy field working machine configured to perform 2. The paddy working machine according to claim 1, wherein the clutch mechanism (C) is configured to be disengaged in accordance with the raising control. 3. The upper and lower operating postures (U),
(D), a neutral posture (N) is provided, and the operation tool (2
The paddy field working machine according to claim 1 or 2, wherein 1) is biased to the neutral posture (N).