JPH0837839A - Rice transplanter - Google Patents

Abstract

PURPOSE:To rapidly carry out a disconnecting operation of a clutch and a climbing operation of a seedling planting device during lifting the seedling planting device. CONSTITUTION:A lifting control system of a seedling planting device A is constructed with a clutch operation means D, a timer means F and a predetermined time change means E. The clutch operation means D lifts the seedling planting device and at the same time begins a disconnecting operation of a clutch mechanism C. The timer means F determines a time from the lifting operation to the beginning of the lifting of the seedling planting device. The predetermined time change means E allows a lifting movement of the seedling planting device before finishing a disconnecting operation of the clutch mechanism C by shortening the predetermined time given to the timer means F depending on the weight measured by a sensor S which measures the weight of the seedling planting device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention disengages a clutch mechanism for transmitting power from a traveling machine body to a seedling planting apparatus in association with an operation of raising a seedling planting apparatus which is connected to a traveling machine body so as to be vertically movable. The present invention relates to an improvement of a rice transplanter that has an interlocking operation mechanism.

[0002]

2. Description of the Related Art As a technique for disengaging and operating a clutch mechanism in conjunction with the rise of a seedling planting apparatus as described above, JP-A-6-6
There is one disclosed in Japanese Patent No. 2623, and in this conventional example, when the switch for raising the seedling planting device is operated, the control system is configured to start the raising of the seedling planting device after the clutch mechanism is disengaged. It is configured.

Also, in this conventional example, the clutch mechanism is disengaged by the driving force of the electric motor.
A mechanical linkage that allows the clutch mechanism to be disengaged at a predetermined rotation phase is formed so as to avoid the posture in which the tip of the planting arm comes into contact with the field when the clutch mechanism of the rice transplanter is disengaged.

In the case where the raising of the seedling planting device is started before the clutch mechanism reaches the disengaged state, the seedling planting operation is continued even if the seedling planting device is raised during the work, and the seedling planting operation is continued. Is wastefully consumed, and the order of control is determined as described above in order to avoid this inconvenience.

[0005]

However, the order of control is determined so that the clutch mechanism is disengaged by the operation of raising the seedling planting device, and after the disengagement operation is completed, the raising of the seedling planting device is started. In that, it is easy to cause a delay in the timing of starting the raising of the seedling planting device, for example, when raising the seedling planting device to turn the aircraft, after performing control to raise the seedling planting device, Even when the turning was started, the leveling float remained in contact with the field scene, and the harmful effect of damaging the planted seedlings also occurred. This adverse effect occurs not only when the clutch mechanism is disengaged by an actuator such as an electric motor, but also when the clutch mechanism reaches a disengaged state after reaching a predetermined rotation phase. It is a thing.

The phenomenon that the start of the raising operation of the seedling planting device is delayed is not due to only the above-mentioned control sequence or the operation mode of the clutch mechanism, and the mud in the field is highly viscous. It is also considered that the ground level float is strongly adsorbed to the field scene. Especially, when the seedling planting device is equipped with a fertilizer application, when the seedling planting amount is large and the weight of the seedling planting device is large, the raising operation is not performed. The start delay was noticeable.

An object of the present invention is to rationalize a rice transplanter that quickly starts the raising operation of the seedling planting device regardless of the weight of the seedling planting device when the operation of raising the seedling planting device is performed. The point is to configure.

[0008]

The features of the present invention are, as described at the beginning, in a rice transplanter forming an interlocking operation mechanism for disengaging the clutch mechanism in conjunction with the operation of raising the seedling planting device. A clutch operation means for starting the disengagement operation of the clutch mechanism at the same time as the operation of raising the seedling planting device is provided with a sensor for measuring the weight of the seedling planting device, and the seedling planting device. The timer means for setting the time from the raising operation to the start of raising the seedling planting device, and the larger the weight of the seedling planting device measured by the sensor, the shorter the time set in the timer means and the clutch mechanism. And the set time changing means for allowing the raising operation of the seedling planting device before the completion of the cutting operation. The action and effect are as follows.

[0009]

According to the above feature, when the operation of raising the seedling planting device is performed, the clutch operating means starts the disengagement operation of the clutch mechanism, and the weight of the seedling planting device measured by the sensor is changed. Based on this, the larger the weight, the shorter the time is set in the timer means by the set time changing means, and the raising of the seedling planting device is started after the time set in the timer means has elapsed from the operation of raising the seedling planting device. It will be done.

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, even if the clutch mechanism does not reach the disengaged state after the disengagement operation is started. By starting the raising operation of the seedling planting device after the elapse of the time set in the timer means, the seedling planting device is raised even if the start of raising the seedling planting device is delayed due to the weight. This makes it possible to shorten the time from the start of the operation until the seedling planting device actually starts to rise, and at the same time, it becomes possible to disengage the clutch mechanism at the start of this raising.

[0011]

Therefore, when the operation of raising the seedling planting device is performed, the rice transplanter which starts the raising operation of the seedling planting device promptly regardless of the weight of the seedling planting device is reasonably constructed. It was done.

[0012]

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 connected through 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. A gear shift lever 10 for operating the continuously variable transmission 5 is provided, and further, in the vicinity of the steering handle 11, the seedling planting device A is forcibly raised to a predetermined level by its operation, and the seedling planting device A is operated again by the operation. A switching lever 12 for lowering A to the working level is provided.
The planting clutch C is configured to be able to cut off the power transmitted from the traveling machine body 3 to the seedling planting device A, and the cutting operation is allowed only in a rotation phase that avoids a posture in which a planting arm (described later) contacts the field. As described above, it is linked to a mechanical restraint system (not detailed).

The elevating lever 9 is constructed so as to be operated along the path shown in FIG. 5. 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 switching lever 12 is operated to the "elevation" position shown in FIG. 6 in the state set to 1, the seedling planting device A at the working level is raised to the upper limit and the planting clutch C is automatically disengaged. Is operated again to the "elevation" position, the raised seedling planting apparatus A is lowered to the working level, and then the switching lever 1
By operating 2 to the "clutch engaged" position shown in FIG. 6, the planted clutch C is engaged and operated, and the switching lever 12 is restored to the "neutral" position in the non-operated state.

The seedling planting device A is rotated by a seedling mount 13 on which a mat-like seedling W is placed, a transmission case 14 to which power is transmitted from the traveling machine body 3, and a power transmitted from this transmission case 14 via a chain case 15. Rotary case 16,
From the lower end of the mat-like seedling W placed on the seedling placing table 13 at the time of work, the rotary case 16 is provided with a pair of planting arms 17 provided one by one and a plurality of ground leveling floats 18 and configured for multiple row planting. The planting arms 17 cut out the seedlings one by one and plant the seedlings in a field scene.

In this rice transplanter, when the raising / lowering lever 9 is operated from the clutch "on" position to the "raising" position or when the switching lever 12 is operated to raise the seedling planting apparatus A, the planting clutch C is used. While performing the cutting operation of
By providing the interlocking operation mechanism for starting the raising operation of the seedling planting apparatus A before the completion of the cutting operation, the seedling planting apparatus A can be quickly raised.

As shown in FIG. 4, a pressure sensor S is provided for an oil passage 21 for supplying hydraulic oil from a hydraulic pump 19 driven by the engine 4 to the hydraulic cylinder 7 via a solenoid valve 20. A system for measuring the weight of the seedling planting apparatus A based on the pressure acting on the oil passage 21 is formed.

As shown in FIG. 2, in this control system, the potentiometer 22 for detecting the operating position of the elevating lever 9 is used.
From the first switch 23 for raising and lowering control operated by the changeover lever 12, the second switch 24 for controlling the planted clutch, and the signal from the pressure sensor S to the control device 25. And an output system for transmitting a signal to each of the solenoid valve 20 that controls the hydraulic cylinder 7 and the relay 27 that controls the electric motor 26 that operates the planting clutch C. The operation is performed according to the flowchart shown in FIG.

This flowchart shows the operation of the interlocking operation mechanism, and the operation is set in the form of a subroutine during the main operation. That is, in this control, when the elevating lever 9 is operated from the “ON” position to the “up” position,
Alternatively, the control for raising the seedling planting device A as in the case where the switching lever 12 is operated to the “elevating” position with the raising / lowering lever 9 set to the “automatic” position and the seedling planting device A lowered. When started, first, the electric motor 26 is driven to start the disengagement operation of the planting clutch C (# 101, #
102 steps). The clutch operating means D is constituted by this step # 102, and after the disengagement operation of the planting clutch C is started, the control operation is set so that the drive of the electric motor 26 is automatically stopped when the disengaged state is reached. There is.

Next, the signal from the pressure sensor S is input,
Based on this sensor value, a shorter timer time is set as the weight of the seedling planting apparatus A is larger, and then the timer is activated to wait for the set time to elapse (# 103).
~ Step # 106).

In this control, the set time changing means E is configured in step # 104 so that the shorter the time is set in the timer, the larger the weight of the seedling planting apparatus A is.
The timer means F is configured by steps # 105 and # 106 so as to set the time from the operation of raising the seedlings to the actual raising of the seedling planting apparatus A, and this timer is made of software.

Next, after the time set by the timer has elapsed, a control operation for operating the solenoid valve 20 to raise the seedling planting apparatus A is started, and when the raising target is reached, the solenoid valve 20 is returned to the neutral position. The control for stopping the ascending operation is performed (steps # 107 to # 109).

As described above, when the operation of raising the seedling planting device A is performed, first, the disengagement operation of the planting clutch C is started, and the counting operation is completed before the disengagement operation of the planting clutch C is completed. Setting time change means E
By setting the time in the timer, the control for raising the seedling planting device A is started after the elapse of this time even if the planting clutch C has not reached the disengaged state. Immediately before starting the ascent or immediately after starting the ascending, the clutch mechanism C surely reaches the disengaged state. Therefore, even if the raising operation of the seedling planting apparatus A is delayed due to external factors such as the remaining amount of the mat-like seedling W and the viscosity of the mud in the field, the start timing of the raising control of the seedling planting apparatus can be accelerated, It is possible to shorten the time from the start of the operation of raising the planting device A until the seedling planting device A actually starts to rise from the field, and it is possible to improve the work efficiency when the machine body 3 is turned at the ridge. The rice transplanter could be constructed.

[Other Embodiments] In addition to the above embodiments, the present invention is
For example, it is possible to configure a control system with a hard circuit that combines a logic gate, a comparator, etc.
As a sensor for measuring the weight of the seedling planting device, it is possible to use a strain gauge or the like for measuring the weight from the bending amount in the link mechanism.

It should be noted that reference numerals are given in 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 of control operation

FIG. 4 is a hydraulic circuit diagram showing the arrangement of sensors.

FIG. 5 is a plan view of an operation path of a lifting lever.

FIG. 6 is a side view showing an operation position of a switching lever.

[Explanation of symbols]

 3 Traveling machine A A seedling planting device C Clutch mechanism D Clutch operating means E Setting time changing means F Timer means S Sensor

Claims (1)

[Claims] 1. Power is supplied from the traveling machine body (3) to the seedling planting apparatus (A) in association with the operation of raising the seedling planting apparatus (A) which is connected to the traveling machine body (3) so as to be driven up and down. A rice transplanter having an interlocking operation mechanism for disengaging a transmission clutch mechanism (C), comprising a sensor (S) for measuring the weight of the seedling planting device (A), and the interlocking operation mechanism. , Seedling planting equipment (A)
The time from the operation of raising the clutch operation means (D) for starting the disengagement operation of the clutch mechanism (C) and the operation of raising the seedling planting device (A) at the same time as the operation of raising the seedling planting device (A) to the start of raising the seedling planting device (A). The larger the weight of the timer means (F) for setting and the weight of the seedling planting device (A) measured by the sensor (S), the shorter the time set in the timer means (F) and the clutch mechanism (C). ) And a set time changing means (E) that allows the raising operation of the seedling planting device (A) before the completion of the cutting operation of (1).