JP3170351B2 - Rice transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a planting apparatus which is connected to a traveling machine body via a link mechanism so as to be driven up and down by an actuator for raising and lowering. The present invention relates to a rice transplanter having a leveling float, and an up / down operation switch for switching the seedling planting device between a ground contact lowering position and a ground ascending position to be driven up and down by manual operation.

[0002]

2. Description of the Related Art In the above rice transplanter, conventionally, when the raising / lowering operation switch is operated from a state where the seedling planting device is in contact with the ground, the seedling planting device rises to near the maximum ascending position, and is again moved up and down. When the is operated, the switch is performed so as to descend to the contact lowering state, and a drive control is performed such that the sequential switching operation is performed based on the switch operation.

[0003]

With the above structure, during turning work on a headland while working in a field, after the planting clutch is disengaged, the seedling planting device is raised and the piloting operation is performed. Steering operation of the steering wheel, and deceleration operation of the traveling speed, etc. must be performed in a short time, and the steering operation is troublesome, especially for unskilled people,
Since the operation is difficult, it is configured such that the raising operation of the seedling planting device is performed by a switch-type operation switch having a small operation stroke in order to reduce such an operation at the time of turning traveling as much as possible. However, in this type of rice transplanter, the descending speed of the seedling planting device is generally configured to be relatively low in consideration of safety. When the planting operation is restarted with the adjacent planting strips, the seedling planting device is raised before the swirl, and after the swirling operation, the seedling planting device is lowered and the planting operation is started. If the attachment device is raised to a position close to the maximum lifting position, it takes time to lower the device to the contact lowering position, and there is a problem that the working efficiency is reduced, and there is room for improvement. An object of the present invention is to eliminate the above disadvantages.

[0004]

Characteristic feature of the present invention, in order to solve the problems], in rice transplanters described at the beginning, when provided with a detecting means for detecting that said ground leveling float is ground emerged together
Then, the raising / lowering operation switch is moved up / down by swinging operation.
Close to the steering handle by freely swinging operation
In place on the lower side, when the seedling planting apparatus is increased operation based on the operation of the elevating operation switch from the state at ground lowered position, said detecting means reaches the seedling planting apparatus to be detected state The point is that a lifting stop means for stopping the lifting operation is provided.

[0005]

When the raising / lowering operation switch is operated to raise the seedling planting device before turning, the seedling planting device starts to rise, the leveling float floats up from the field scene, and the detecting means enters the detecting state. The raising operation of the seedling planting device is stopped. As a result, when turning around the edge of the field,
Attached to the lower end of the seedling plant to level the ground.
Turn with the terrain float floating.
You. Therefore, when turning around the ridge,
The mud surface is in contact with the mud surface,
It is possible to avoid a situation where the field scene is devastated .
Moreover, since the rising and stopping of the leveling float is detected by detecting the time when the leveling float floats to the ground, the amount of rise is small, and there is not much time delay when the descending operation is performed again by operating the elevation operation switch. In this state, it is possible to quickly set the touchdown state. The lifting operation switch is
It is located near the steering wheel and below it.
Steering wheel while watching the turning direction
Handle operation and a location near the steering wheel
That can conveniently operate the lifting and lowering switch
It is. In other words, handle operation while watching the turning direction
And then in a position away from the steering wheel
Search for the lifting operation switch of the device by groping and operate in the specified direction
Without the need for inconvenient operation
The switch of the raising / lowering operation switch in relation to the
Easy and quick switch operation.

[0006]

Of turning when a ridge in the planting work in the field, according to the present invention
At the time, the seedling planting equipment
By detecting the ascent to the ground, the seedling planting device rises to the ground.
The volume can be set to an appropriate volume that allows for rapid descent
The lift switch near the steering wheel.
Located at the bottom of the plant, raising the seedling planting device at the start of turning
Operation and lowering of the seedling planter at the end of turning
Do not stop the steering wheel operation while gazing at the opposite side.
Even if the work mode is such that the planting operation is immediately restarted with the adjacent planting strip after turning, the seedling planting device roughens the field scene when turning the aircraft, In the planting work after turning, the descending operation of the seedling planting device can be performed quickly, and the work efficiency can be improved while preventing the adverse effects of the above.

[0007]

Embodiments will be described below with reference to the drawings. FIG.
Shows a riding rice transplanter. The rice transplanter can be raised and lowered at the rear of the riding type traveling body via a parallel four-link mechanism 1 and can freely roll left and right around the longitudinal axis.
Are connected. The seedling planting apparatus 2 takes out the seedling rest 4 and the seedlings for planting one by one from a lower end portion of the seedling rest 4 in a planting transmission case 3 which also serves as a frame and reciprocates with a constant stroke, and plant the seedlings in a field. A plurality of planting mechanisms 5,
It is provided with three ground floats 6 and the like arranged in parallel on the left and right sides, and is configured to move up and down by expansion and contraction driving of a hydraulic cylinder 7 (an example of an actuator). As shown in FIG. The rolling operation is performed by a rolling operation mechanism 10 including an electric motor 8 and a screw feed mechanism 9 provided between the mounting table 4 and the back surface side. The hydraulic control valve V for the hydraulic cylinder 7 is of an electromagnetic type.
The drive is controlled by a control device 11 having a microcomputer. In other words, as shown in FIG. 1, the operation of the lifting lever 13 disposed on the side of the driver's seat 12 of the aircraft control section can be artificially performed to cause the raising operation, the lowering operation, and the neutral stop state to appear. . That is, the operation amount of the lifting lever 13 is set to the first potentiometer P
M1 and the control device 11 performs zone discrimination of the detected value of the first potentiometer PM1 for each predetermined level, and controls to switch to an operation state of an ascending position, a neutral position, a descending position, and a planting work position. When configured to operate in the raised position, the hydraulic cylinder 7 is driven to drive the seedling plant 2
Is raised to the maximum ascending position, and when it is operated to the neutral position, the seedling planting device 2 is held at that position. When the elevating lever 13 is in one of the operating positions of the descending position and the planting work position, it will be described later. A control program is configured to execute such an automatic elevating control operation. In the planting operation state, the control device 11 is provided with a lift control means A for maintaining the height of the seedling planting device 2 above the ground at a predetermined value in a control program form.
That is, the ground float 6 at the center on the left and right as a leveling float
Is supported so as to be able to swing up and down around a rear fulcrum, and the front portion is supported so as to be able to move up and down within a predetermined range via a refracting link 14, so that this ground float according to a change in the height of the seedling planting device 2 with respect to the ground is provided. 6 is detected by the second potentiometer PM2 on the front side of the hydraulic cylinder 7 based on the variation of the ground pressure, and the control device 11 controls the electromagnetic force of the hydraulic cylinder 7 so that the output value of the second potentiometer PM2 falls within a predetermined set area. By controlling the control valve V, the seedling planting apparatus 2 is maintained at a predetermined ground height. The swing operation type lifting / lowering operation switch SW1 disposed near the steering handle 15 is configured so that the raising operation and the lowering operation of the seedling planting device can alternately appear. The raising / lowering operation switch SW1 is urged backward in a predetermined direction, and when the swing operation is performed against the return urging force, the control device 11 controls to switch between the ascending operation mode and the ground contact descent mode based on the operation. It is composed. That is, when the raising and lowering operation switch SW1 is operated when the seedling planting apparatus 2 is at the ground contact lowering position, that is, when the raising and lowering lever 13 is operated to the lowering position or the planting operation position, the controller 11 sets the electromagnetic control valve to V is forcibly switched to the raising operation position, control is performed so as to raise the seedling planting apparatus 2, and then, when the raising and lowering operation switch SW1 is operated again, the control device 11 switches the electromagnetic control valve V to the lowering position and raises. That is, the seedling planting apparatus 2 is controlled to descend to the ground. Then, when the seedling planting apparatus 2 is ascended based on the operation of the raising / lowering operation switch SW1 from the state in which the seedling planting apparatus 2 is in the ground descending position, when it is detected that the ground float 6 is floating above the ground, the seedling planting apparatus 2 is raised. The control device 11 is provided with an ascent stop means B for stopping the operation in the form of a control program. That is, the control device 11
When the lifting operation of the lifting operation switch SW1 is performed, the electromagnetic control valve V is controlled to be switched to the rising side, and the ground float 6 is relatively lowered with the raising of the seedling planting device 2 to be in the hanging posture, The second potentiometer PM
2 When it is determined that the output of [an example of ground levitation detecting means] has detected the maximum value in the suspended posture, the electromagnetic control valve V is moved to the neutral position after a lapse of a predetermined time (for example, 0.5 seconds) from that time. The switching control is performed to stop the raising operation of the seedling planting apparatus 2. Thereafter, when the raising / lowering operation switch SW1 is operated again, the electromagnetic control valve V is controlled to switch to the lowering side, and the seedling planting apparatus 2 is controlled to descend to the ground.

[Other Embodiment] Instead of the means for detecting the output of the second potentiometer PM2 as the means for detecting the floating of the ground float 6 above the ground, the floating of the ground float 6 above the front side of the ground float 6, namely Alternatively, a dedicated limit switch for detecting a suspended state may be provided, and the rising operation may be stopped in accordance with the detection operation of the limit switch.

In the claims, reference numerals are provided to facilitate 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 a control block diagram

FIG. 2 is a front view of a rolling operation mechanism.

FIG. 3 is an overall side view of the rice transplanter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Link mechanism 2 Seedling plant 6 Land leveling float 7 Actuator B Elevation stop means SW1 Elevation operation switch PM2 Ground floating detection means

Claims (2)

(57) [Claims] 1. A seedling planting device (2) is connected to a traveling machine body via a link mechanism (1) so as to be driven up and down freely by a lifting actuator (7). A lifting / lowering operation switch (SW1) provided with a leveling float (6) that can be moved up and down in a range, and that switches the seedling planting device (2) between a ground-down position and a ground-up position in accordance with a manual operation; ) Comprising a detecting means (PM2) for detecting that the leveling float (6) is floating above the ground , and
Operation switch (SW1) can be moved up and down freely by swinging operation
Steering handle (15) with a simple swing operation
The detection means (PM2) detects when the seedling placement device (2) is placed near and below the lower side and the raising operation is performed based on the operation of the raising and lowering operation switch (SW1) from the state where the seedling planting device (2) is at the ground contact lowering position. A rice transplanter having ascending and stopping means (B) for stopping the ascending operation of the seedling planting device (2) when the state is reached. 2. The ascending stop means (B) stops the ascending operation of the seedling planting device (2) after a predetermined time has passed from the point in time when the detecting means (PM2) has reached the detecting state. The rice transplanter according to claim 1.