JPH05219805A - Controller for lifting and lowering of rice transplanter - Google Patents

Abstract

PURPOSE:To improve the operability by installing a means for forcedly lifting a seedling planter at an advanced or a retreated position of a speed change lever for travel and a lowering operation means for lowering the seedling plant er according to switch operation. CONSTITUTION:The objective controller 19 is equipped with a lifting controlling means (A) for forcedly lifting a seedling planter when a speed change lever 23 for travel is operated to a speed change position (R) for backing. Furthermore, a lowering operation means (B) for lowering the seedling planter by the operation of a lifting and lowering operation switch (SW1) for the seedling planter after the forced lifting operation of the seedling planter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a raising / lowering operation in which a drive mechanism is connected to a seedling planting device by a drive mechanism so that the planting plant can be raised and lowered and the seedling planting device can be forcibly raised and grounded. The present invention relates to an elevation control device for a rice transplanter equipped with a switch.

[0002]

2. Description of the Related Art Conventionally, in the above-mentioned raising / lowering control device for a rice transplanter, as disclosed in Japanese Patent Laid-Open No. 3-83502, when a backward traveling state of a traveling machine body is detected, the seedling planting device is raised accordingly. In some cases, when the seedling planting device is activated and the seedling planting device is raised to the maximum raised position, the raising operation control is released, and thereafter, the seedling planting device can be artificially lowered by the artificial lifting lever. In addition to such a lifting operation system, a control system using a lifting operation switch is provided.
When the raising / lowering operation switch is switched during planting work, the seedling planting device is configured to be raised to the maximum raised position, and when the raising / lowering operation switch is operated again, the seedling planting device is switched to the grounding lowered position. There was

[0003]

In the conventional structure described above, when the traveling machine body is moved backward in the field, the seedling planting device mounted on the rear portion of the machine body may come into contact with ridges or the like and may be damaged. As soon as it is set, the seedling planting device is raised and the seedling planting device is touched down as close as possible to the ground so that it can be grounded. In addition to the above, the elevating and lowering operation switch allows the operator to operate the seedling planting device after disengaging the work clutch of the seedling planting device when the operator turns the headland during planting work in the field, for example. It is difficult for an unskilled person to operate the steering wheel because it is necessary to raise it from the grounding work state and perform the turning operation of the steering wheel, and these operations must be performed quickly within a short time. Because it's an operation to perform rising operation of the seedling planting apparatus, rather than swinging operation of the operation lever, but with improved operability constitutes a simple changeover switch operations. However, there is a drawback in that manually operating the swing operation type lever after the above-described ascending operation during reverse travel is complicated, and in this case, it is conceivable to provide a dedicated changeover switch for descending operation. However, this has the drawback that the number of operating tools increases and the operation becomes complicated, and the structure becomes complicated. An object of the present invention is to eliminate the above-mentioned inconveniences with a rational configuration.

[0004]

A feature of the present invention is that in the elevator control device for a rice transplanter described at the beginning, a shift for detecting that the traveling shift lever of the traveling machine body has been operated to the reverse shift position. A position detecting means and a raising control means for forcibly raising the seedling planting device when the shift position detecting means is in a detection state, and of the elevating operation switch after the seedling planting device is forcibly raised. It is provided with a descending operation means for descending the seedling planting device in accordance with the operation.

[0005]

[Operation] When turning on the ridge while working in the field, operate the raising / lowering operation switch to raise the seedling planting device, and make a turn to align with the next planting strip and lower the seedling planting device. When it is to be operated, it can be lowered by operating the elevating operation switch again. Then, after the above-mentioned alignment, if you want to move the planting start position slightly backward, if you move the aircraft backward for alignment, the seedling planting device will automatically move up, so it may collide with ridges and be damaged. When the seedling planting device is grounded and lowered to start the next planting work, it is sufficient to operate the elevating operation switch once, and the elevating operation switch can be operated by one-touch operation. Easy to operate.

[0006]

As a result, while avoiding the risk of collision of the seedling planting device with the ridges or the like when the aircraft is moving backward, the subsequent descending operation can be performed at an arbitrary position and with a simple operation. Therefore, it is possible to prevent complication of the structure such as providing an operation tool dedicated to the descending operation.

[0007]

Embodiments will be described below with reference to the drawings. Figure 5
Shows a riding type rice transplanter. In this rice transplanter, a seedling planting device 2 can be driven up and down by a lift cylinder 3 [an example of a drive mechanism] via a parallel four-link mechanism 1 in the rear part of a riding type traveling machine body, and a rolling cylinder 4 can be used for the front and rear axis of the machine body. It is configured so that it can be driven and rolled around. The traveling machine body has an engine 6 mounted in a driving part bonnet 5 at the front of the machine body, and the power of the engine 6 is supplied to a belt type continuously variable transmission 7 and a first forward speed F for road traveling.
1, a forward second speed F2 for planting work, and a rearward state R are supplied to front and rear wheels 9 and 10 via a gear-type main transmission 8 which is freely switchable to form an airframe traveling drive system and a main transmission. 8 to transmission shaft 11 and planted clutch 12
The transmission system is configured to be supplied to the seedling planting device 2 via the. The planted clutch 12 is configured to be engaged and disengaged by an electric motor M with a speed reduction mechanism that is capable of normal and reverse rotation. The belt type continuously variable transmission 7 is configured such that the front and rear pulleys 24 are split pulleys and the pulley spacing is changed by an electric cylinder 26 via a cam mechanism 25 so that the speed can be changed steplessly. The seedling planting device 2
Is equipped with a seedling stand 13 on which planting seedlings are placed and reciprocates left and right, a planting mechanism 14 for taking out one seedling from the lower end of the seedling stand 13 and planting it in a field, a leveling float 15, and the like. During the planting operation run in the field, the planting depth of the seedlings is controlled to be constant while maintaining the height of the seedling planting device 2 against the mud surface in a predetermined posture, and due to the unevenness of the tiller. Then, automatic control means for maintaining the seedling planting device 2 in a posture parallel to the mud surface with respect to the traveling vehicle body that is inclined is provided. That is, as shown in FIG. 1, rocking arms 16R and 16R that rock up and down while following the ground contact with the left and right sides of the seedling planting device 2.
A ground type ground height detecting sensor 18R, 18L composed of L and potentiometers 17R, 17L for detecting the relative angle of the swinging arms 16R, 16L, and a microcomputer to which the outputs of the detecting sensors 18R, 18L are input. The control device 19 provided includes the detection sensors 18R, 1
A control program for driving and controlling the electromagnetic hydraulic control valve V1 of the rolling cylinder 4 is provided so that the detection value of 8L matches, and the average value of the detection values of the detection sensors 18R and 18L matches a predetermined value set in advance. Thus, a control program for driving and controlling the electromagnetic hydraulic control valve V2 of the lift cylinder 3 is provided. The automatic control means is provided in the control device 19 in the form of a control program as described above. In addition, on both the left and right sides of the seedling planting device 2, a line drawing marker 27, which draws a line as a running index for the next planting strip on the mud surface,
27 is provided in such a manner that it can swing back and forth and is biased to project, and as shown in FIG. 3, the relative angle of the guide roller 28 in the link mechanism 1 changes with the raising of the seedling planting device 2 so that the operation wire 29 is interposed. It is configured to be interlocked and stored, and is provided with lock mechanisms 30 and 30 that lock and hold in this storage posture. As shown in FIG. 4, the left and right lock mechanisms 30, 30 are cam members 31, 32 that rotate around the same axis Y.
The cam members 31 and 32 are configured so that the cam members 31 and 32 are alternately locked by the one-way rotation mechanism 34 driven by the electromagnetic solenoid 33.

On the control panel 20 of the vehicle,
The raising / lowering lever 21 for artificially raising / lowering the seedling planting device 2 is provided, and this raising / lowering lever 21 is a raising position for forcibly raising the seedling planting device 2, and a neutral position for stopping the raising / lowering and holding that position. , A descending position where the seedling planting device 2 is lowered to the ground to set the automatic control mode, and a planting position where the seedling planting device 2 is lowered to set the planting clutch 12 to the engaged state and set to the automatic control mode, respectively. It is configured so that it can be freely switched. That is, the output of the potentiometer 22 for detecting the swing operation amount of the elevating lever 21 is input to the control device 19,
The zone is discriminated based on the detection level of the potentiometer 22, and the control corresponding to each of the operation positions is performed. Further, on the control panel 20, a raising / lowering operation switch SW1 that can be freely switched between a state in which the seedling planting device 2 is forcibly raised and a state in which it is grounded and lowered regardless of the operation of the raising / lowering lever 21, and the planting Each clutch operating switch SW2 of the clutch driving electric motor M is provided. In the vicinity of the speed change lever 23 of the main transmission 8, a planting work state detection switch SW3 for detecting that the speed change lever 23 has been operated to the second forward speed position F2 and a reverse position R.
Reverse state detection switch SW that detects that the switch has been operated
4 [an example of shift position detecting means], and a link switch SW5 for detecting that the seedling planting device 2 is at the maximum raised position is provided in the vicinity of the link mechanism 1, and each of these switch groups is provided. It is connected to the control device 19. Then, when the reverse drive state detection switch SW4 is in the detection state, the forcible raising means A for forcibly raising the seedling planting device and the elevating operation switch SW1 after the seedling planting device is forcibly raised as described above. It is provided with descending operation means B for descending the seedling planting device 2 in accordance with the operation. The forcible raising means A and the lowering operation means B are provided in the control device 19 in the form of a control program, and will be described in detail below together with the control operation of the control device 19.

FIG. 2 shows a control flowchart of the control device 19 during traveling of the planting work. During control,
The elevating lever 21 is set to the planting position. When the main shift lever 23 is operated to the second forward speed F2 and the planting work state detection switch SW3 is in the detection state, for example, when the elevating operation switch SW1 is operated near the ridge, the electric cylinder 26 is controlled and driven. Then, the deceleration control is automatically performed to near the minimum speed, the marker switching solenoid 33 is driven to select the line drawing markers 27, 27 from left to right, and the electric motor M is driven to disengage the planted clutch 12. While operating [Steps 1-5],
The seedling planting device 2 is driven up to the upper limit position while judging from the detection state of the link switch SW5 [step 6-
8]. Then, when the raising / lowering operation switch SW1 is operated again, the seedling planting device 2 is lowered, and when the clutch operation switch SW2 is operated, the electric motor M is driven to activate the planting clutch 12 to plant it. The work is restarted [steps 9 to 12]. When the main speed change lever 23 is operated to the reverse position R while the seedling planting device 2 is in the ground-down state, the seedling planting device 2 is forcibly lifted and then maintained in the raised position until the elevating operation switch SW1 is operated. Then, when the raising / lowering operation switch SW1 is operated, the seedling planting device 2 is lowered [steps 13 to 16]. As described above, when the shift lever 23 is operated to the reverse position R, the seedling planting device 2 is forcibly lifted, but at this time, it is raised and then lowered again by operating the lifting operation switch SW1. become. The step 14 constitutes the forced raising means A, and the steps 15 and 16 constitute the descending operation means B.

It should be noted that reference numerals are added to the claims for facilitating the comparison with the drawings, but 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] Control flowchart

FIG. 3 is a front view showing an operating state of a drawing marker.

FIG. 4 is a front view showing an unlock structure.

[Figure 5] Overall side view of rice transplanter

[Explanation of symbols]

 2 Seedling planting device 3 Drive mechanism 23 Gear shift lever A Forced raising means B Lowering operation means SW1 Lifting operation switch SW4 Gear shifting position detecting means

Claims (1)

[Claims] 1. A seedling planting device (2) connected to a traveling machine body by a drive mechanism (3) so as to be able to move up and down, and the seedling planting device (2).
A raising / lowering control device for a rice transplanter equipped with a raising / lowering operation switch (SW1) that can be switched between a state in which the vehicle is forcibly raised and a state in which the vehicle is lowered to the ground. A shift position detecting means (SW4) for detecting that the shift position is operated, and a raising control means (A) for forcibly raising the seedling planting device (2) when the shift position detecting means (SW4) is in a detection state. And a descending operation means (B) for lowering the seedling planting device (2) according to the operation of the elevating operation switch (SW1) after the seedling planting device (2) is forcibly raised. Lifting control device for rice transplanter.