JPH0819315A - Rice transplanter - Google Patents

Abstract

PURPOSE:To provide a rice transplanter, designed to lift a seedling planter interlocking with a backing operation of a mobile machine body and capable of separating a land grading float of the seedling planter from the field surface at the time of starting the backing of the mobile machine body without damaging the already planted seedlings. CONSTITUTION:This rice transplanter is obtained by installing a controlling means for performing the disconnecting operation of a planting clutch C when a main speed change lever 12 is set at a backing position and lifting a seedling planter A after the passage of the sufficient set time. The set time is set so as to enable the free artificial change with a setter or in inverse proportion to the weight of the seedling planter. Thereby, the time from the backing operation of the mobile machine body to the start of the lifting of the seedling planter is shortened and the land grading float 19 of the seedling planter is kept in a state separated from the field surface when the mobile machine body starts the backing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice transplanter, and more particularly to a control technique for automatically raising a seedling planting device when a traveling machine body is moved backward.

[0002]

2. Description of the Related Art In a conventional rice transplanter, when a shift operation for moving a traveling body backward is performed, this operation is detected, and a clutch mechanism interposed in a transmission system for driving a seedling planting device is disengaged, After completion of this cutting operation, the sequence of control operations is set so that the actuator such as a hydraulic cylinder is activated to automatically raise the seedling planting device.

Further, in many conventional rice transplanters, the clutch mechanism is disengaged by the driving force of an electric motor or the like.
A mechanical linkage is formed that allows the clutch mechanism to be disengaged at a predetermined rotation phase so as to avoid the posture in which the tip of the planting arm comes into contact with the field during the disengagement operation.

[0004]

However, the control sequence is determined so that the clutch mechanism is disengaged during the speed change operation for moving the traveling machine body backward, and after the disengagement operation is completed, the raising of the seedling planting device is started. However, even when the traveling aircraft starts to move backward, the leveling float remains in contact with the field scene and the existing seedlings are damaged. This adverse effect is caused not only by a time delay when the clutch mechanism is disengaged by an electric motor or the like, but also by a time delay caused by the clutch mechanism reaching a disengaged state after reaching a predetermined rotation phase. In some cases, a commercially available rice transplanter may require a time of 0.6 seconds or more after the gear shift operation for moving the traveling vehicle body backward is performed until the planting clutch reaches the disengaged state.

The phenomenon that the start of the raising operation of the seedling planting device is delayed is not only due to the order of the control described above, but when the seedling planting device is heavy and the weight of the seedling planting device is large, or when the soil in the field is mud. This is also considered to be caused by the fact that the ground level float of the seedling planting device, which is highly viscous, is strongly adsorbed in the field, and the ground level float will not be generated even when the traveling aircraft starts to move backward even if it is caused by such an external cause. It sometimes fell into contact with the field.

It is an object of the present invention to perform an operation for moving a traveling machine body backward, and when the traveling machine body actually starts moving backward, the ground leveling float of the seedling planting device separates from the field scene and damages the existing seedlings. The point is to reasonably configure a rice transplanter.

[0007]

A feature of the present invention is that a clutch mechanism that transmits power from the traveling machine body to the seedling planting device is operated in conjunction with the operation of moving the traveling machine body backward, and the traveling machine body is moved backward. The control unit for automatically raising the seedling planting device connected to the traveling machine up and down after a lapse of a set time from the operation for providing the seedling planting device is equipped with a detecting device for determining the weight of the seedling planting device. The larger the weight of the planting device, the smaller the setting time is set, or the setting time is artificially changed from the operation of moving the traveling machine backward to the start of automatic raising of the seedling planting device. There is a point that the set time can be changed freely,
Its action and effect are as follows.

[0008]

According to the above characteristics, the clutch mechanism for the seedling planting device is disengaged when the traveling body is moved backward, and the seedling is set after the set time has elapsed from the start of the operation for moving the traveling body backward. Start the control to raise the planting device and configure this setting time to be freely changeable. In addition, if the weight of the seedling planting device is large, this setting time should be made small or artificially adjusted. Thus, the raising operation of the seedling planting device can be started after a predetermined time has elapsed from the operation of moving the traveling body backward.

That is, since the clutch mechanism will definitely reach the disengaged state after the lapse of a predetermined time when the disengagement operation is started, after the disengagement operation is started, regardless of the state of the clutch mechanism, the disengaged state is maintained for the predetermined time. By starting the raising operation of the seedling planting device after the passage of time, even if the rising start of the seedling planting device is delayed due to an external cause, or conversely, the rising start of the seedling planting device is accelerated, the traveling machine body It is possible to shorten the time from the start of the operation for moving backward to the actual start of the raising of the seedling planting device, and at the same time, it is also possible to disengage the clutch mechanism at the start of this raising.

[0010]

As a result, when the operation of moving the traveling machine body backward is performed, and when the traveling machine body actually starts to move backward, the planting float of the seedling planting device is separated from the field scene and rice planting that does not damage already planted seedlings. The machine was reasonably constructed.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, an engine 4 is provided at the front of a traveling machine body 3 having a drive-type front wheel 1 and a drive-type rear wheel 2 that are operated by a steering operation, and power from the engine 4 is continuously variable. A belt tension type continuously variable transmission 5 for shifting gears is mounted, a driver's seat 6 is arranged at the center of the traveling machine body 3, and a hydraulic cylinder 7 is used to move up and down with respect to the rear end portion of the traveling machine body 3. The seedling planting device A is detachably connected via the mechanism 8 to form a riding type rice transplanter.

An elevating lever 9 is provided on the right side of the driver's seat 6 to control the raising and lowering of the seedling planting device A and to open and close the planting clutch C as a clutch mechanism. Shift gear shift lever 1 for operating the gear shift device 5
0, and the traveling speed is on the left side of the steering wheel post of the steering wheel 11 as shown in "F1, F2" in FIG.
The main gear shift lever 12 is provided which can be switched between the position and the reverse position indicated by "R". Further, at a position near the steering handle 11, the operation causes the seedling planting device A to be forcibly raised to a predetermined level, and again. The switching lever 13 for lowering the seedling planting device A to the working level is provided. The planting clutch C is formed with a mechanical restraint system (not described in detail) so that the cutting operation is allowed only in a rotation phase in which a posture in which a planting arm (described later) comes into contact with the field is avoided.

The elevating lever 9 is constructed so as to be operated along the path shown in FIG. 4. When the elevating lever 9 is set to the front side of the "lowering" position in the path, the seedling planting apparatus A is lowered and the "raising" is performed. When set to the rear of the position, the seedling planting device A
Is raised and set to the "neutral" position to keep the seedling planting device A at that level. Further, when the elevating lever 9 is set to the “ON” position, the planting clutch C is operated to be engaged, and when the elevating lever 9 is set to the “OFF” position, the planting clutch C is operated to be disengaged. When the setting is set to 1, the raising / lowering of the seedling planting device A is permitted in accordance with the operation of the switching lever 12, and at the same time, the planting clutch C is automatically disengaged when the seedling planting device A is raised, and the seedling planting device A is lowered. The clutch C is automatically turned on and operated.

The seedling planting device A is rotated by the seedling mount 14 on which the mat-shaped seedling W is placed, the transmission case 15 to which power is transmitted from the traveling machine body 3, and the power transmitted from this transmission case 15 via the chain case 16. Rotary case 17,
From the lower end of the mat-like seedling W placed on the seedling placing table 14 at the time of work, the rotary case 17 is provided with a pair of planting arms 18 provided one by one and a plurality of ground leveling floats 19 and configured for multiple row planting. The planting arms 18 cut out the seedlings one by one and plant the seedlings in a field scene.

In this rice transplanter, the traveling body 3
When the main shift lever 12 is set to the reverse position "R" when the vehicle is moved backward, a control system is configured to disengage the planting clutch C and forcibly raise the seedling planting apparatus A to a predetermined level. By providing the control system for performing the raising operation of the seedling planting apparatus A more quickly, the planting clutch C reaches the disengaged state when the traveling machine body 3 moves backward, and the seedling planting apparatus A is separated from the field scene. Is configured to.

An outline of the control system can be shown as shown in FIG. 2. In this control system, the back switch 20 for detecting that the main transmission lever 12 is set to the reverse position "R", and the back switch 20 are provided. A first switch 21 for operating the planting clutch, which is operated when the switching lever 13 is operated, a second switch 22 for moving the seedling planting device A up and down, and a pressure sensor 2 as a detection means for measuring the internal pressure of the hydraulic cylinder 7.
3. Manual setting device 2 that artificially sets the timer value
4 is provided with an input system for inputting signals from each of them to the control device 25 as control means, and operates the solenoid valve 26 for controlling the hydraulic cylinder 7 with the signal from this control device 25 and the planting clutch C. An output system for each relay 28 that controls the electric motor 27 is provided.

As shown in FIG. 5, the hydraulic cylinder 7 is constructed so that pressure oil from a hydraulic pump 29 driven by the engine 4 is supplied through the electromagnetic valve 26, and the weight of the seedling planting apparatus A is increased. The pressure sensor 23 is provided for the oil passage 30 communicating with the hydraulic cylinder 7 so as to measure the pressure based on the pressure acting on the hydraulic cylinder 7.

The control operation for raising the seedling planting apparatus A when the main transmission lever 12 is set to the reverse position "R" is shown in FIG.
In this control, when it is detected by the back switch 20 that the main transmission lever 12 is set to the reverse position "R", the electric motor 27 is driven via the relay 28 to drive the planting clutch C. If the timer value is set by the manual setting device 24 after starting the cutting operation, this value is set to the timer value and the manual setting device 2
If the timer value is not set in step 4, the timer value is set based on the signal from the pressure sensor 23 (#
101-105 steps).

Next, after the timer (which is composed of software) is started and the set time has elapsed, the solenoid valve 26 is operated to start the raising control of the seedling planting apparatus A, and the seedling planting apparatus is started. When A reaches the upper limit, the solenoid valve 26 is returned to the neutral position and the ascending operation is stopped (# 106-1).
10 steps).

In this way, when the operation of moving the traveling machine body 3 backward is performed, the disengagement operation of the planting clutch C is started, and the seedling is set after the elapse of the set time set sufficiently to complete the disengagement operation of the planting clutch C. Since the planting device A is raised, the clutch mechanism C surely reaches the disengaged state after a predetermined time has elapsed, and the seedling planting device A is caused by external factors such as the remaining amount of the mat-shaped seedling W and the viscosity of the mud in the field. If the start of the raising operation is delayed, the start timing of the raising operation is accelerated. Conversely, if the viscosity of the mud in the field is extremely low, the rising operation of the seedling planting device A is accelerated. By delaying the timing, it is possible to shorten the time from the start of the speed change operation for moving the traveling machine body 3 backward to the actual start of the raising of the seedling planting apparatus A from the field, and at the same time,
When the traveling body 3 actually starts to move backward, the seedling planting device A
It was possible to construct a rice transplanter capable of separating the leveling float 19 from the field scene.

Further, in this rice transplanter, the operation position of the elevating lever 9 is detected by a potentiometer (not shown), and when the elevating lever 9 is disengaged from the "automatic" position to the "ascending" position, the operation is stopped. Even if there is, the control for disengaging the planting clutch C and the control for raising the seedling planting device A are started, so even if the elevating lever 9 is disengaged from the automatic position for a short time due to vibration or the like during work. Even if it is detected that the signal of the potentiometer is taken in at an extremely short interval so that the control of No. is not started and that the lifting lever 9 is out of the "automatic" position by the signal obtained by this sensing, The control is switched only when the result is continuously measured a predetermined number of times (predetermined time), and the lifting lever 9 is held in the "automatic" position in other cases. Control operation is set so continues to perform the same control.

[Other Embodiments] In addition to the above embodiments, the present invention is
For example, equipped with sensors that detect when the planting clutch has reached the disengaged state, first disengage the planting clutch as described above, and then control the raising of the seedling planting device after the time set by the timer has elapsed. At the timing when the raising of the seedling planting device is actually started (at the timing when the ground level float of the seedling planting device slightly rises from the field scene).
If the planting clutch is still in the engaged state, it is also possible to set the control action to stop the raising action until reaching the disengaged position.

Further, according to the present invention, the link mechanism may be provided with a sensor for determining the weight of the seedling planting device.
Set the control operation so that the start timing of raising the seedling planting device is determined only by the weight of the seedling planting device, or determine the start timing of raising the seedling planting device only by artificially entering a value. It is also possible to set the control operation so that

It should be noted that reference numerals are added to the claims for convenience of 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]

[Figure 1] Overall side view of rice transplanter

FIG. 2 is a block circuit diagram of a control system.

FIG. 3 is a flowchart showing a control operation.

FIG. 4 is a plan view showing an operation path of a lifting lever.

FIG. 5 is a hydraulic circuit diagram showing the arrangement of pressure sensors.

[Explanation of symbols]

 3 Traveling body 23 Detection means 25 Control means A Seedling planting device C Clutch mechanism

Claims (1)

[Claims] 1. A clutch mechanism (C) for transmitting power from the traveling machine body (3) to the seedling planting device (A) in conjunction with an operation of moving the traveling machine body (3) backward, and also the traveling machine body. A control means (25) for automatically raising the seedling planting device (A) that is vertically connected to the traveling machine body (3) after a lapse of a set time from the operation of moving the (3) backward is provided with the seedling planting device (A). ) Is provided, and the set time is set to a smaller value as the weight of the seedling planting device (A) obtained by the detected means is larger, or the set time is artificially set. The rice transplanter is configured so that the set time from the operation of moving the traveling body (3) backward to the start of the automatic raising of the seedling planting device (A) can be freely changed.