JPH05316830A - Rice transplanter - Google Patents

Abstract

PURPOSE:To provide a rice-transplanting machine which can optimize the start timing of the transplant as the operability is improved in the turn near the levees by utilizing existing devices without complication in its structure. CONSTITUTION:A planting unit is connected through the hydraulic cylinder 13 to the running body so that it can freely rise and fall, the driving force is supplied from the engine 3 through the clutch 9 whose clutching and unclutching are switched by the electric motor 20, to the planting unit, and SW3 for clutching operation is set to switch manually the electric motor 20. When the unit is lifted from the ground, the lowermost position, the clutch is automatically unengaged before the rising operation, and, when it goes down from the uppermost position to the ground, the engage of the clutch is inhibited until the potentiometer PM1 detects the planting unit coming down to the ground, regardless of the operations of the clutch operation switch SW3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention connects a seedling planting device to a traveling machine body via a link mechanism so as to be driven up and down by an actuator for lifting and lowering, and allows the engine mounted on the traveling machine body to be turned on and off by an actuator. A rice transplanter which is configured to supply power to the seedling planting device through intermittent planting clutches so that the planting plant can be moved up and down within a predetermined range.

[0002]

2. Description of the Related Art Conventionally, in the above rice planting machine, an actuator for driving a planting clutch is disengaged in conjunction with a raising operation of a seedling planting device, and a lowering operation of the seedling planting device is performed. It has been considered that after a predetermined time has elapsed from the time of the lowering operation, the actuator is automatically operated in conjunction with the clutch engagement side.

[0003]

The structure as described above is intended to improve the maneuverability in the turning operation on the edge of the ridge during work in the field. In other words, when turning around the ridge, the aircraft operator switches the traveling speed of the aircraft to a low speed state, disengages the planting clutch, and raises the seedling planting device while steering. It is necessary to operate them, and these operations must be performed in a short time, which makes the operation cumbersome. Therefore, the operation load can be reduced by operating the planting clutch with an actuator, and the seedling planting device can be used. By automatically engaging and disengaging the clutch in conjunction with the raising and lowering operation of, the operation is less troublesome. However, as described above, when the seedling planting device is lowered after the turning and the next planting work is started, if the planting clutch is automatically operated after a predetermined time has passed from the lowering operation, Although it is possible to eliminate the inconvenience of the operation, because the dedicated engagement operation of the planting clutch is unnecessary, the alignment work to match the aircraft with the predetermined planting strip is different depending on the skill of the operator. If the time is set too long, the work efficiency will decrease for highly skilled pilots, and if the elapsed time is set too short, it will be difficult for unskilled pilots to operate, and However, there is a problem that the planting clutch may be operated and thrown the seedlings into the air with the seedling planting device raised to the ground after the time has passed, and there are still points to be improved. Was Tsu. The present invention aims to eliminate the above-mentioned problems.

[0004]

According to a characteristic configuration of the present invention, in the rice transplanter described at the beginning, a clutch operating tool for manually operating an actuator for driving the planting clutch is provided, and the seedling planting device is grounded. When raised from the state in the lowered position to the ground, the planting clutch is automatically disengaged prior to the raising operation, and when the ground is lowered from the raised position, it is detected that the grounding float has grounded. Until the detection means enters the detection state, the clutch control means is provided to control the drive actuator so as to restrain the clutch engagement operation of the planting clutch regardless of the operation of the clutch operation tool.

[0005]

[Operation] When turning a ridge in a field where the maneuvering operation is troublesome, the clutch is automatically disengaged with the raising operation of the seedling planting device, so the troublesome operation can be eliminated. When the planting work is completed and the next planting work is started, the clutch can be artificially set to the clutch engaged state when the traveling machine body is aligned with the planting strip, and the planting work is started in a state in line with the operator's intention. You can do it. Moreover, even if the clutch operation tool is turned on and operated while the seedling planting device is rising above ground due to an incorrect operation,
At that time, since the operation of the drive actuator is restrained, the ground contact state is detected by the relative vertical movement change of the ground leveling float, and the planting clutch is operated only when the seedling planting operation is possible.

[0006]

As described above, although the operation in the ridge-turning traveling can be simplified as much as possible and the operability can be improved, at the start of the planting work, a bad operation such as throwing seedlings into the air due to an erroneous operation occurs. And you can start planting work at the right time.
We have been able to provide rice transplanters that can continue good planting work. Moreover, by effectively utilizing the relative vertical movement structure of the leveling float that is generally provided in this type of rice transplanter, the grounding condition of the seedling planting device can be detected, so there is no significant complication of the structure. ..

[0007]

Embodiments will be described below with reference to the drawings. Figure 2
Shows a riding type rice transplanter. This rice transplanter is constructed by connecting a seedling planting device 2 to a rear portion of a riding type traveling body via a parallel four-link mechanism 1 so as to be able to move up and down. The traveling aircraft is
The engine 3 is mounted on the front of the machine body, and the power of the engine 3 is input to the mission case 5 via the belt continuously variable transmission auxiliary transmission 4 and is transmitted to the front and rear via the gear type main transmission in the transmission case 5. A transmission system is configured to be transmitted to the wheels 6 and 7 to drive and drive the vehicle body, and the power after shifting of the transmission case 5 is transmitted to the transmission shaft 8 and the planted clutch 9.
It is configured to be supplied to the seedling planting device 2 through intermittent operation via the so that the seedling planting work can be performed while the machine body is running. The seedling planting device 2 is a seedling stand 10 that moves laterally back and forth with a constant left-right stroke, and a planting mechanism 1 that takes out one seedling from the lower end of the seedling stand 10 and plant it in a field.
1. The hydraulic cylinder 1 is provided with a plurality of ground leveling floats 12 and the like that are swingably supported around a rear fulcrum.
It is configured such that it can be driven up and down by 3. Further, when performing the planting work in a state where the seedling planting device 2 is grounded down, an automatic lifting control means for maintaining the mud surface height of the seedling planting device 2 at a predetermined level is provided. That is, as shown in FIG. 1, the hydraulic control valve V for the hydraulic cylinder 13 is electromagnetically driven, and the electromagnetic control valve V is electrically driven and controlled by the control device 14 including a microcomputer. A vertical potentiometer PM1 detects the amount of vertical swing due to fluctuations in the ground pressure of the center ground float 12, and the detected value is the sensitivity adjuster 1 provided in the aircraft control section.
The control device 14 is configured to automatically control the electromagnetic control valve V so as to match the set value according to 5. Further, the seedling planting device 2 is configured to be capable of being manually moved up and down between the maximum rising position and the ground contact lowering position when traveling on a road or turning a headland in a field. That is, the raising / lowering operation lever 17 is provided on the side of the driver's seat 16 of the aircraft control section, and the raising / lowering swing lever 17 is provided.
The operation amount of is detected by the second potentiometer PM2,
The control unit 14 is configured to discriminate the detected value of the second potentiometer PM2 for each predetermined level, and control the switching to each of the operating positions of the ascending position, the neutral position, the descending position, and the planting work position. When it is operated to, the hydraulic cylinder 13 is driven to raise the seedling planting device 2 to the maximum rising position, and when operated to the neutral position, the seedling planting device 2 is held at that position, and the lifting operation lever 17 is operated. The control program is configured to execute the above-described automatic elevating control operation when the operating position is either the descending position or the planting work position. Further, a swing operation type lifting operation for forcibly moving the seedling planting device 2 up and down between the maximum rising position and the ground contact lowering position while the swing operation lever 17 is set to the planting work position. The switch SW1 is provided so that a lifting operation can be performed with less inconvenience such as a large swinging operation of the lever when the headland is turned. The raising / lowering operation switch SW1 is arranged near the steering handle 18 and is biased to return in a predetermined direction. When the swing operation is performed against the return biasing force, the control device 14 raises based on the operation. It is configured to control switching between the mode and the ground descending mode. That is, when the seedling planting device 2 is in the grounding position for planting work, the lifting operation switch SW1
When the control device 14 is operated, the control device 14 forcibly switches the electromagnetic control valve V to the raising operation position and controls to raise the seedling planting device 2. Then, when the raising / lowering operation switch SW1 is operated again, the control device 14 The electromagnetic control valve V is switched to the lowered position, and the rising seedling planting device 2 is controlled so as to descend to the ground. When the seedling planting device 2 is raised to the maximum raised position in accordance with the operation of the elevating switch SW1, the limit switch SW2 for detecting that the seedling planting device 2 has been raised to the maximum raised position is provided on the rear side of the traveling body. The link mechanism 1 is attached to the wheel fender portion 19 and is associated with the ascending operation.
The control device 14 switches the electromagnetic control valve V to the neutral position to drive the hydraulic cylinder 13 on the rising side based on the detection operation of the limit switch SW2. It is configured to automatically stop. The planted clutch 9 is configured so as to be interlocked with each other through a linkage mechanism 21 so that it can be turned on and off by an electric motor 20 (an example of an actuator), and the electric motor 20 is also driven and controlled by a control device 14. The planted clutch 9 is of an occlusal type and is biased toward the clutch entering side by an internal spring (not shown). The electric motor 20 is driven to pull the operating tool 9a to operate the clutch disengaging side. is there. Further, a clutch operation switch SW3 (an example of a clutch operation tool) is provided in the control section so that the planted clutch 9 can be manually turned on and off. The control device 14 controls the lifting operation lever 1
When 7 is operated to the planting work position, the planting clutch 9 is controlled to be automatically engaged and operated, and when the seedling planting device 2 is moved up and down by the elevating operation switch SW1, the planting operation is performed prior to the elevating operation. The clutch of the planted clutch 9 is controlled regardless of the operation of the clutch operation switch SW3 until the grounding float 12 is detected to touch the ground when the grounded float 12 is grounded and lowered from the raised position. A clutch control means A for controlling the drive electric motor 20 so as to restrain the entering operation is provided in a control program format. That is, the control device 14 controls the descending operation of the seedling planting device 2 by the elevating operation switch SW1.
The seedling planting device 2 descends and the leveling float 12 starts to come into contact with the ground, and the relative vertical posture changes from the self-weight hanging state and the first potentiometer PM as the grounding state detecting means.
Until the change in the detected value of 1 is detected, even if the clutch operation switch SW3 is operated, the operation of the electric motor 20 is restrained and the planted clutch 9 is maintained in the disengaged state. Then, when the grounded state is detected from the detection value of the first potentiometer PM1, when the clutch operation switch SW3 is subsequently operated, the electric motor 20 is driven and the planted clutch 9 is controlled to be operated. Then, the mode changeover switch SW4 capable of releasing the clutch engagement / restriction operation of the control device 14 as described above.
Is equipped with. That is, this mode changeover switch SW4
Is switched to the release side, the electric motor 20 is driven by operating the clutch operation switch SW3 to engage the planting clutch 9 even when the seedling planting device 2 is being raised. It is configured so that it can be set to the state. Therefore, when the mode changeover switch SW4 is switched to the restraint release side when not in operation, maintenance work such as adjusting the amount of seedlings to be taken by the planting mechanism 11 is performed in a posture in which the seedling planting device 2 is greatly raised. You can do it with.

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 Control block diagram

[Figure 2] Overall side view of rice transplanter

[Explanation of symbols]

 1 Link Mechanism 2 Seedling Planting Device 3 Engine 9 Planting Clutch 12 Leveling Float 13 Lifting Actuator 20 Driving Actuator A Clutch Control Means PM1 Grounding State Detection Means SW3 Clutch Operation Tool

Claims (1)

[Claims] 1. An actuator (13) for raising and lowering a seedling planting device (2) to a traveling machine body via a link mechanism (1).
The seedling planting device (2) is connected so as to be capable of being driven up and down by means of a planting clutch (9) which is operated by an actuator (20) which is turned on and off by an engine (3) mounted on the traveling machine body. A rice transplanter, which is configured to supply power to a plant, and is equipped with a planting device (2) having a leveling float (12) that can be moved up and down within a predetermined range,
An actuator (2) for driving the planted clutch (9)
0) is equipped with a clutch operating tool (SW3) for manually operating the planting clutch (9) prior to the raising operation when the seedling planting device (2) is raised to the ground from the ground lowering position. The clutch operating tool (SW3) until the grounding state detecting means (PM1) that detects that the ground leveling float (12) is grounded when the grounding float (12) is grounded when the grounding lowering is performed from the ascending position. ), The drive actuator (20) for restraining the clutching operation of the planted clutch (9).
Rice transplanter equipped with a clutch control means (A) for controlling the