JPH0425762B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention includes a sensor float at the center of the aircraft body in the left-right direction to detect vertical movement, side floats on both sides thereof, and a sensor float to detect mud hardness. The present invention relates to a seedling planting device for a rice transplanter that is provided with a detection unit.

[Conventional technology]

In a rice transplanter, the raising and lowering of the seedling planting device is controlled in order to keep the seedling planting depth constant. This is to control the raising and lowering of the seedling planting device based on the vertical displacement of the sensor float so that the ground pressure of the sensor float, which is attached to the seedling planting device so that it can move up and down, reaches the set value. The control sensitivity can be changed by adjusting the ground pressure, and the sensitivity is generally adjusted artificially depending on the hardness of the mud in the field.

In recent years, attempts have been made to improve the control function by detecting the hardness of mud and automatically adjusting the sensitivity. An example of such a structure is disclosed in Japanese Utility Model Application No. 58-189719, in which a mud hardness detection section is arranged in front of the sensor float arranged on the center line of the fuselage.

[Problem that the invention seeks to solve]

The above-mentioned position is a good position that is not affected by the rolling movement of the seedling planting device, but since the mud hardness detection part and the sensor float are not in the same position in the longitudinal direction of the aircraft, that is, in the direction of movement, the sensor The mud condition at the position where the float is in contact with the ground does not necessarily match the mud condition at the position of the mud hardness detection unit, and this mud hardness detection value was useful for improving the functionality of elevation control. There may be no.

Here, an object of the present invention is to arrange the mud hardness detection section so as to be effective in improving the function of elevation control.

[Means for solving problems]

A feature of the present invention is that in the seedling planting device of the rice transplanter described above, a mud hardness detection section is provided on one side of the sensor float, and the mud hardness detection section is not provided closer to the sensor float than the center line of the machine body. The functions and effects are as follows.

[Effect]

When the mud hardness detector is placed in the above position, the sensor float and the mud hardness detector are at the same position in the direction of travel, and the mud condition at the position of the sensor float and mud hardness detector is approximately the same. Match.
The mud hardness detection part will be located at a position slightly offset from the center line of the aircraft, but since the sensor float is deviated to the side where the mud hardness detection part is not installed, the mud hardness detection part is placed sufficiently close to the longitudinal centerline of the aircraft and further away from the side floats, so the rolling action of the seedling planting device,
It becomes less susceptible to the effects of waves etc. from side floats.

〔Effect of the invention〕

As described above, seedlings can be planted by arranging the mud hardness detector so as to detect the mud hardness near the center line of the aircraft, which is less susceptible to various influences, and near where the sensor float is in contact with the ground. We were able to reliably improve the performance of the lift control in the attached equipment.

〔Example〕

Hereinafter, a rice transplanter which is an embodiment of the present invention will be described based on the drawings.

As shown in FIG. 4, a seedling planting device 3 is connected to the rear of the wheeled traveling machine via a link mechanism 2 that is positively operated by a hydraulic cylinder 1 so as to be able to rise and fall freely, and the power from the traveling machine is connected to the seedling planting device 3. A riding type rice transplanter is constructed so that the information is transmitted to the seedling planting device 3 via the PTO shaft 4.

The seedling planting device 3 is provided with a planting arm 7, which is swing-driven up and down via a link mechanism 6 and has a planting claw 9 at the tip, at the rear of a planting case 5 serving as a planting device body. At the same time, a seedling platform 8 that is reciprocated in the width direction of the machine in conjunction with the swinging movement of the planting arm 7 and supplies pine-shaped seedlings to the planting claws 9, and a ground float 10 are installed at the bottom of the planting case 5. The entire structure is made up of:

The power from the engine 20 is transmitted by belt transmission to a transmission (not shown) in the transmission case 21, and the gears are changed and transmitted to the front wheels 22 and rear wheels 23, and the seedlings are planted from the PTO shaft 4. Device 3
is transmitted to. A main clutch 25 is installed inside the input shaft 24 of the transmission case 21, and as shown in FIG.
The friction plate 27 is pressed against the friction plate 27 by the biasing force 6 and biased toward the clutch engagement side. and,
To disengage the main clutch 25, a cylindrical clutch operating member 28 equipped with an inclined cam portion 28a is rotated by a clutch pedal (not shown) and moved in the axial direction to separate the friction plate 27 from the pressed state. Then, the clutch is disengaged.

Next, the grounding float 10 and the mud hardness detection section 11
More specifically, as shown in FIGS. 1 and 2, the grounding float 10 is composed of a sensor float 12 at the center of the fuselage and side floats 13 on both sides thereof. The sensor float 12
is rotatably supported around the horizontal axis _P1 of the planting case 5.

More specifically, a swinging arm 15 is pivotally supported on a bracket 14 in front of the sensor float 12.
A sensor spring 17 is installed between one end of the swinging arm 15 and the support section 16 extending from the planting case 5, and the other end of the swinging arm 15 and the lifting/lowering operation section (not shown) of the machine body are released. They are interlocked and connected via a wire 18. The sensor spring 17 urges the sensor float 12 toward the downward swinging side,
The vertical movement of the sensor float 12 is transmitted to the lifting operation section by the release wire 18, and based on this, the raising and lowering of the seedling planting device 3 is controlled by the hydraulic cylinder 1 and the link mechanism 2.

As shown in the figure, the swing shaft 19 of the swing arm 15 extends laterally, and the mud hardness detection section 11 is attached to the end of the swing shaft 19. Further, the sensor float 12 is set a distance l from the body center line A to the side where the mud hardness detection section 11 is not provided.
The mud hardness detection section 1 is offset by
1 is brought closer to the centerline A of the aircraft.

The mud hardness detection unit 11 is urged by a sensor spring 17 to swing downward, that is, to enter the mud. The connection point with the seedling planting device 3 is moved downward, and the biasing force of the sensor spring 17 is weakened, so that the sensor float 12 sensitively detects the vertical movement of the seedling planting device 3. Conversely, when the mud is hard, the mud hardness detection section 11 swings upward,
As a result, the connection point between the swing arm 15 and the sensor spring 17 is moved upward, and the sensor spring 17
The biasing force of the sensor spring 17 is strengthened, and the upward swinging of the sensor float 12 becomes insensitive, and even if mud or the like is partially present, the biasing force of the sensor spring 17 actively crushes it.

[Brief explanation of drawings]

The drawings show an embodiment of the seedling planting device for a rice transplanter according to the present invention, in which Fig. 1 is a schematic plan view of the sensor float and side float, Fig. 2 is a side view of the vicinity of the sensor float, and Fig. 3 is a main clutch. FIG. 4 is an overall side view of the riding rice transplanter. 11...mud hardness detection section, 12...sensor float, 13...side float, A...body center line.

Claims (1)

[Claims] 1 Sensor float 12 that detects vertical movement at the center of the aircraft in the left and right direction, and side floats 1 at both ends.
3 and a mud hardness detection section 11 for detecting mud hardness. In addition, there is a seedling planting device for a rice transplanter in which the sensor float 12 is deviated from the body center line A to the side where the mud hardness detection section 11 is not provided.