JPH0453404A - rice transplanter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention connects a seedling planting device to a traveling machine body using a hydraulic drive mechanism so that it can be driven up and down, and the relative up and down movement of a ground float due to ground pressure fluctuations is achieved. The present invention relates to a rice transplanter equipped with a lift control means for maintaining the seedling planting device at a predetermined height relative to the mud surface based on the above.

[Conventional technology]

In the rice transplanter, conventionally, when the seedling planting device is descending onto the mud surface in a non-driving state, the elevation control means is configured to operate even when the machine is stopped. It had been.

[Invention or problem to be solved]

However, in the conventional structure described above, when replenishing the mat seedlings on the seedling tray, for example, when the mat seedlings are transferred onto the seedling tray, the seedling planting device lowers slightly due to the weight of the seedlings. However, as the float descends, the ground pressure of the ground float fluctuates and lift control is executed, which may cause hunting. This makes it difficult to supply mat seedlings, and there is room for improvement.

The present invention aims to solve the above-mentioned problems.

[Means to solve the problem]

The characteristic structure of the first invention is that, in the rice transplanter described at the beginning, a grounding state detection means detects that the grounding float is grounded on a mud surface, and a grounding state detection means detects that the main clutch of the traveling machine body is in a disengaged state. The second invention is characterized in that it is provided with a clutch detection means for detecting the clutch, and a hydraulic control means for setting and maintaining the hydraulic oil flow to the hydraulic drive mechanism in a stopped state when both the detection means are in the detection state. is characterized by a lock state detection means for detecting that the main clutch of the traveling aircraft is locked in a disengaged state, and a lock state detection means that sets the flow of hydraulic oil to the hydraulic drive mechanism to a stopped state in accordance with the detection operation of the detection means. There is also a hydraulic control means for maintaining the pressure.

[For production]

■ According to the configuration of the first invention, even when the ground float is in contact with the mud surface, that is, when the seedling planting device is lowered and the elevation control is executed, when the main clutch is disengaged. Since the hydraulic oil does not flow, the seedling planting device is fixed vertically to the aircraft body.

■ According to the configuration of the second invention, when the main clutch is locked in the disengaged position, that is, when the aircraft stops traveling and the driver leaves the control section for work such as replenishing seedlings, , the flow of hydraulic oil is stopped, and the seedling planting device is fixed in vertical movement relative to the aircraft body.

〔Effect of the invention〕

Due to the above action ■ or ■, when the seedling planting device is lowered onto the mud surface and set at a low position to replenish mat seedlings, the seedling planting device is fixed in vertical movement, so positioning during replenishment work is adjusted. The transfer operation has become easier.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

FIG. 4 shows a riding type rice transplanter according to the present invention. This rice transplanter is constructed by connecting a seedling planting device (1) to the rear of a riding-type traveling body via a link mechanism (2) so that it can be raised and lowered and rolled left and right. The seedling planting device (1) includes a seedling platform (3) tilted backwards and a planting claw (4) that cuts out seedlings one by one from the lower end of the seedling platform (3) and plants them in the field.
), a ground float (5) that slides on the mud surface, etc.
The lift cylinder (6) (an example of a hydraulic drive mechanism) is driven to perform an elevation drive, and the rolling cylinder (7) is driven to perform a rolling drive.

In addition, as shown in Fig. 2, the tip of a support arm (10) is supported in a horizontally oriented pipe frame (9) provided in a planting transmission case (8) that also serves as a frame, so that it can be adjusted in vertical swing and fixed. The rear part of the grounding float (5) is pivotally supported around a horizontal fulcrum so that it can freely swing up and down, and the front part of the float is attached to the planting transmission case (
8), so that the front part of the float can move up and down within a certain range. The apparatus further includes an elevation control means for maintaining the seedling planting device (1) at a predetermined height relative to the mud surface based on the vertical movement of the grounding float (5) relative to the seedling planting device (1) due to ground pressure fluctuations. be. In other words, as shown in Fig. 1, the first potentiometer for detecting the vertical movement of the grounding float (5) is fixed in position on the planting transmission case (8) above the front part of the grounding flow (5). the output of the first potentiometer (PM) is given to a control device (12) equipped with a microcomputer;
Automatic elevation control is executed by controlling the electromagnetic control valve (V) for driving the lift cylinder (6) so that this output is always maintained within a predetermined setting range. In addition, the operation switch (SW
) The automatic control described above is executed at the "lower" position and the "planting" position, and when the "neutral" position is set, the position is held, and when the "raise" position is set, the forced upward movement is performed.

On the side of the grounding float (5), a grounding sensor (13) that swings up and down while following the grounding on the mud surface is pivoted to the planting transmission case (8), and the grounding sensor (13) is attached to the planting transmission case (8). Sensor (1
3) The second potentiometer (P
M2) is installed.

In addition, in the traveling body, there is a main clutch in a manually energized state (
17) can be set to the clutch disengaged state by depressing the main clutch pedal (18), and a main clutch switch (19) is provided near the main clutch pedal (18) to detect when the pedal is operated to the disengaged position. ) An example of C clutch detection means] is provided.

When the ground sensor (13) detects the float ground state and the detection switch is in the detection state,
Hydraulic control means is provided for setting and maintaining the flow of hydraulic oil to the lift cylinder (6) in a stopped state. This hydraulic control means is stored as a program in the control device (12),
The elevation control operation will be explained below.

As shown in FIG. 3, first, the signals of the first and second potentiometers (PMI) and (PM2) are read (step S,), and from the detected value of the second potentiometer (PM2), the grounding It is determined whether the float (5) is in contact with the mud surface (step S2).

In other words, if the grounding surface of the grounding sensor (13) is approximately at the same level as the bottom of the float or higher, it is determined that the ground is in contact, and if it is in contact with the ground, then the main clutch switch (19) is in the OFF state. That is, it is determined whether the main clutch (17) is in the engaged state (step S3), and if it is in the engaged state, it is determined whether the detected value of the first potentiometer (PMI) is within a predetermined setting range. The electromagnetic control valve (V) is controlled and driven until it falls within the set range (steps 84 to S7). Then, in step S3, when it is determined that the main clutch (17) is in the disengaged state, the electromagnetic control valve (V) is forcibly set in the neutral state, and the main clutch (17) is operated in the engaged state. This state is maintained until (step S).

The above steps S2, S3, and S8 constitute the hydraulic control means (A), and steps 84 to S7 constitute the elevation control means. Further, the ground sensor (13) and the second potentiometer (PM2) constitute float ground state detection means.

[Another example]

Instead of detecting the grounding state of the grounding float (5), the hydraulic control means may be operated by detecting the locking of the main clutch pedal (18) in the disengaged state.

In other words, as shown in Figure 5, the main clutch pedal (18
), the locking tool (2o) is pivotally supported so that it can be freely operated by stepping on it.
This locking device (20) is attached to the stopper (21) when the clutch is released by depressing the main clutch pedal (18).
) to hold the main clutch pedal (18) in the disengaged position. Further, the stopper (21) is configured to swing in accordance with the locking operation to detect and operate the detection switch (22), and the detection switch (22)
(An example of lock state detection means) The signal from the control device (12
), and when the control device (12) enters the sensing state,
The electromagnetic control valve (V) is configured to be forcibly controlled and driven to a neutral state.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of the drawing]

The drawings show an embodiment of the rice transplanter according to the present invention, in which Fig. 1 is a control block diagram, Fig. 2 is a rear side view, Fig. 3 is a control flow chart, Fig. 4 is an overall side view, and Fig. 5 is a control block diagram. FIG. 7 is a side view of main parts of another embodiment. (1)...Seedling planting device, (5)...Grounding float, (6)...Drive mechanism, (17)...
...Main clutch, (19)...Clutch detection means.

Claims (1)

[Claims] 1. A seedling planting device (1) is connected to the traveling machine so that it can be driven up and down by a hydraulic drive mechanism (6), and a ground float (5
), the rice transplanter is equipped with a lifting control means for maintaining the seedling planting device (1) at a predetermined height relative to the mud surface based on the relative vertical movement accompanying ground pressure fluctuations of the rice transplanter, wherein the ground float (5) is A grounding state detection means for detecting that the aircraft is grounded on a mud surface, a clutch detection means (19) for detecting that the main clutch (17) of the traveling body is in a disengaged state, and both of the above-mentioned detection means are in a detection state. The rice transplanter is provided with hydraulic control means for setting and maintaining the flow of hydraulic oil to the hydraulic drive mechanism (6) in a stopped state when the rice transplanter is in a stopped state. 2. A seedling planting device (1) is connected to the traveling machine so that it can be driven up and down by a hydraulic drive mechanism (6), and a ground float (5
) is a rice transplanter equipped with a lifting control means for maintaining the seedling planting device (1) at a predetermined height relative to the mud based on the relative vertical movement accompanying ground pressure fluctuations of the main clutch (17) of the traveling body. )
a lock state detection means (22) for detecting that the hydraulic drive mechanism (6) is locked in an OFF state; and a lock state detection means (22) for detecting that the detection means (22) is activated to set and maintain the flow of hydraulic oil to the hydraulic drive mechanism (6) in a stopped state. A rice transplanter equipped with hydraulic control means for