JP2622204B2 - Rice transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a construction in which a seedling planting device is connected to a traveling body so as to be able to move up and down freely, and power is supplied intermittently to a planting mechanism in the seedling planting device. The present invention relates to a rice transplanter in which a seedling placement device is provided with a ground-following type ground height detection sensor.

[0002]

2. Description of the Related Art Conventionally, in the above rice transplanter, it has been general to transmit power from a traveling machine body to a seedling planting device via a planting clutch which can be turned on and off by manual operation.

[0003]

However, according to the above-mentioned conventional structure, when the headland turns in the planting operation in the field, the operation of disengaging the planting clutch is performed together with the speed control of the traveling machine, the steering operation for turning, and the like. It has to be performed almost at the same time, and the operation is troublesome for an unskilled person. Therefore,
As a method for solving such a disadvantage, the planting clutch is configured to be electrically controlled, and the planting clutch is operated only when the planting operation state, that is, when the seedling planting device is in contact with the mud surface. It was conceived to control it. That is, since this type of rice transplanter is provided with a ground-following-type ground sensor for stabilizing the ground posture of the seedling-planting apparatus, the output of the ground sensor is used to control the planting clutch. Is what you do. However, in the above-described improved structure, the planting clutch operates only when the seedling planting device is always in contact with the rice field surface. It is not possible to cope with the case where it is desired to start the drive before this or to measure the amount of fertilizer while the seedling planting device is being lifted up and the fertilizer application is performed in a system equipped with a fertilizer device, and there is still room for improvement. there were. An object of the present invention is to eliminate the above-mentioned disadvantages.

[0004]

According to a feature of the present invention, in the rice transplanter described at the beginning, when the sensor for detecting the height above the ground detects that it is separated from the ground, power transmission to the planting mechanism is performed. And a pseudo signal generation means for generating a pseudo signal equivalent to the signal level of the ground height detection sensor in the grounded state, and a signal from the pseudo signal generation means is provided. The present invention is characterized in that a check release means for releasing the check operation by the drive check means when provided is provided.

[0005]

When the sensor for detecting the height of the ground is away from the ground, that is, when the seedling planting device is being driven upward, the driving of the planting mechanism is suppressed and the plant is not operated. In this state, there is no inconvenience that the planting mechanism is erroneously driven and the seedlings of each plant are thrown into the air, and the plant is always set to the driven state only at a position where planting on the field is possible. Then, when it is necessary to operate the planting mechanism with the seedling planting device raised, the signal from the pseudo signal generating means is provided so that the ground height detection sensor is separated from the ground. However, since the same signal as in the case of grounding is given, the above-described restraint is released, and the planting mechanism can be set to the driving state.

[0006]

Therefore, in planting work in the field, the planting mechanism operates only when the seedling planting device is in contact with the rice field, and when the seedling planting device rises, the planting mechanism operates. Since the operation is stopped, it is possible to eliminate the need for an artificial power-off operation without adverse effects such as loss of seedlings, thereby improving operability. Moreover, by switching the output signal,
It is now possible to easily perform ancillary work such as adjusting the condition at the start of planting and adjusting the amount of fertilizer.

[0007]

Embodiments will be described below with reference to the drawings. FIG.
Shows a riding rice transplanter. This rice transplanter is configured by connecting a seedling planting device 3 via a parallel quadruple link mechanism 2 to a rear part of a riding type traveling machine body 1 so as to be able to move up and down and roll freely around a longitudinal axis. An engine 4 is mounted on the front of the traveling body 1 and the power of the engine 4 is
The transmission system is configured to transmit to the front and rear wheels 6 and 7 via the planting clutch CL and to the seedling planting device 3 via the planting clutch CL.

[0008] The seedling planting apparatus 3 comprises a seedling stand 9 which reciprocates and moves laterally with a constant stroke with respect to a planting transmission case 8 which also serves as a frame. Rotating case-type planting mechanism 1 to take out and plant in field
0, swing arm type ground sensors 11R and 11L which are disposed on the left and right sides of the lower front position of the planting transmission case 8 and detect a ground height by swinging displacement while following a pair of grounds.
The seedling planting apparatus 3 is driven up and down by driving a lift cylinder 12, and the rear link 2 a of the quadruple link mechanism 2 and the seedling stand 9 are provided. The right and left rolling drive is performed by a rolling cylinder 13 horizontally connected between the left and right sides of the vehicle.

As shown in FIG. 1, the seedling planting device 3 comprises:
By setting the operation switch SW1 provided on the aircraft control unit 14 to the ascending position, the forcibly ascending to the maximum ascending position,
When set to the neutral position, the state is maintained, and when set to the descending position, it descends to the contact position, and when it is set to the planting position, the contact position is lowered and the planting clutch (not shown) is engaged to operate the planting drive. It is configured to be in a state. or,
The grounding sensors 11R and 11L are configured to detect the vertical swing amount of the swinging arms 15R and 15L that swing while following the ground by potentiometers PM1 and PM2, respectively, to detect the ground height, and the operation switch SW1 When the grounding sensors 11R, 1
Lifting and lowering control means A for driving the lift cylinder 12 to maintain the seedling planting device 3 at a predetermined height so that the average value of the output of 1L matches a predetermined set value, and both sensors 11R and 11L.
Of the rolling cylinder 13 so that the outputs of
And a rolling control means B for maintaining the left and right inclination posture of the seedling planting device 3 at a predetermined posture. That is,
The hydraulic control valves V1 and V2 of the cylinders 12 and 13 are each configured to be electromagnetically driven, and the operation switches SW
1. A control device 16 for receiving the outputs of the ground sensors 11R and 11L and drivingly controlling the hydraulic control valves V1 and V2 is provided. Be provided.

When it is detected that the ground sensors 11R and 11L are separated from the ground, the planting mechanism 1
0 is provided with a driving restraint means C for restraining the power transmission to 0 to the off state, and the grounding sensor 11 in the grounding state is provided.
A pseudo signal generating circuit 17 (an example of a pseudo signal generating means) for generating a pseudo signal equivalent to the signal levels of R and 11L is provided. When a signal from the pseudo signal generating circuit 17 is given, the driving restraint means C A check release means D for releasing the check operation is provided. Specifically, the grounding sensor 11
R, 11L Potentiometers PM1, PM2
When the output voltage level of the signal becomes a value corresponding to the ground state, the voltage level is determined to determine the state of being separated from the ground,
Is configured to generate a signal having a voltage level equivalent to the voltage level corresponding to the grounding state, the planting clutch CL is configured to be electromagnetically driven, and the planting clutch CL is driven by the control device 16. It is composed. Further, an operation changeover switch SW2 is provided in the aircraft operation unit 14, and a state in which output signals from the potentiometers PM1 and PM2 are input and a state in which a signal from the pseudo signal generation circuit 17 is input by turning on and off the operation changeover switch SW2. It is configured to switch between. The drive restraint means C and the restraint release means D are provided in the control device 16 in the form of a control program, and the control device 16 executes control as follows.

As shown in FIG. 2, the operation switch SW1 is operated to the raised position, and the operation changeover switch SW
2 has been turned off (steps S1, S1
2) The lift cylinder 12 is driven to move the seedling planting device 3 up to the maximum position (step S3). When the operation switch SW1 is operated to the neutral position and the operation changeover switch SW2 is turned off (steps S4 and S5), the driving of the rolling cylinder 13 and the lift cylinder 12 is stopped and the state is maintained. (Step S6). If the operation switch SW1 is operated to the lowered position, it is determined whether or not the output signals of the potentiometers PM1 and PM2 are at the ground level (step S7,
S8) If it is not at the ground contact level, the lift cylinder 12 is driven to descend and control until the seedling planting device 3 is in the ground contact state (step S9). Then, the operation switch SW1 is operated to the planting position, and each of the potentiometers PM1, PM2
Is at the ground level (steps S10 and S10).
11) Engage and operate the planting clutch CL to set the planting operation state, and execute the above-described rolling control and elevating control (steps S12 and S13).
In steps S2 and S5, when the operation changeover switch SW2 is turned on and operated, each of the potentiometers PM1. The signal from the pseudo signal generating circuit 17 is input instead of the output signal from PM2, and the seedling planting apparatus 3 is considered to be in the ground state by this signal (steps S14 and S15), and planting is performed. The clutch CL is engaged and operated (step S16). In such control, the main clutch of the traveling machine body is set to the engaged state. The step S11 constitutes the driving restraint means C, and the steps S2, S5, S14 to S16
This constitutes the restraint release means D. In this manner, in the planting operation in the field, the planting mechanism 10 is set to the operating state even when the seedling planting apparatus 3 is floating from the rice field in order to adjust the tip position of the planting streak. It is possible to do. Also, the planting mechanism can be set to the operating state when adjusting the fertilizer application amount.

[Another embodiment] The operation changeover switch S
W2 is provided with a switch for detecting that the shift operation lever of the transmission 5 of the traveling body 1 has been operated to the neutral position, in place of the one provided with the dedicated artificial operation switch. The operation switching as described above may be performed.

[0013] In the claims, reference numerals are provided to facilitate comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings.

[Brief description of the drawings]

FIG. 1 is a control block diagram.

FIG. 2 is a control flowchart.

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

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 traveling body 3 seedling planting device 10 planting mechanism 11R, 11L ground height detection sensor 17 pseudo signal generating means C driving restraining means D restraining releasing means

Claims (1)

(57) [Claims] 1. A seedling planting device (3) is connected to a traveling machine body (1) so as to be able to move up and down freely, and power is intermittently supplied to a planting mechanism (10) of the seedling planting device (3). A rice transplanter having the above configuration, wherein the seedling planting device (3) is provided with a ground-following ground height detection sensor (11R), (11L), wherein the ground height detection sensor (11R),
When detecting that (11L) is separated from the ground, a drive restraining means (C) for restraining power transmission to the planting mechanism (10) to a cut-off state is provided, and the ground height in a ground contact state is provided. Detection sensor (11R), (1
1L), and a pseudo signal generating means (17) for generating a pseudo signal equivalent to the signal level of 1L).
7) A rice transplanter provided with a check release means (D) for releasing a check operation by the drive check means (C) when a signal from 7) is given.