JPH025372B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention provides an operating section that moves the seedling planting device up and down with a drive relative to the vehicle body, which is biased toward the ground side by a spring so as to maintain the seedling planting device at an appropriate working height above the ground. The present invention relates to a riding rice transplanter in which a swinging grounding float provided in the seedling planting device is interlocked so that its posture relative to the ground is maintained substantially constant.

In the above-mentioned riding rice transplanter, in order to turn the vehicle body while leveling the mud surface with the soil leveling float (so-called floating turn), conventionally, the seedling planting device was automatically controlled to raise and lower in order to reduce the mud resistance of the soil leveling float. Two operations were performed: a spring bias release operation to maintain the height slightly higher than the normal working height, and an operation to stop the seedling planting operation.

However, it is cumbersome to perform the above two operations when performing a steering operation or a gear change operation, and there is room for improvement in terms of operation.

SUMMARY OF THE INVENTION An object of the present invention, in view of the above-mentioned conventional situation, is to make it possible to easily perform mud-leveling turns through reasonable improvements.

The characteristic configuration of the present invention is that, in the riding rice transplanter described above, a planting clutch for intermittent transmission of power to the seedling planting device and an adjustment section for adjusting the biasing force of the spring are set in the cut state of the planting clutch. so that the biasing force of the spring can be changed to the minimum,
It is linked to one operating tool provided on the vehicle body, and with one operation on the operating tool, the seedling planting device can be put into a state for leveling the mud surface and turning, improving operability. This has made it possible to greatly improve the efficiency of planting work that involves leveling and turning the mud surface.

Next, embodiments of the present invention will be described in detail based on illustrative drawings.

As shown in FIG. 1, a vehicle body frame 3 includes a pair of left and right rear propulsion wheels 1 and a pair of left and right front propulsion wheels 2 for steering operation, which can be freely operated with a deflock. 5, and a sloped seedling stand 6 that moves back and forth horizontally with a constant stroke, and seedlings one by one are placed one by one along the lower end row of a plurality of pine-shaped W placed side by side on the seedling stand 6. A seedling planting device 10 equipped with various devices such as a plurality of seedling planting claws 7 for planting on a mud surface and a plurality of soil leveling floats 8 and 9 arranged side by side in the left and right direction of the vehicle body is mounted at the rear of the vehicle body frame 3. , are connected via a link mechanism 11 to a hydraulic cylinder 12 so as to be able to move up and down the vehicle body, thereby forming a riding rice transplanter that sequentially plants a plurality of seedlings as the vehicle travels.

In order to drive the seedling platform 6 and the seedling planting claw 7,
Planting transmission case 13 that interlocks and connects them
and the main drive unit 4 are interlocked and connected at the left and right center of the vehicle body via a PTO shaft 15 that can be operated on and off to transmit power using a planting clutch 14, and two universal joints 16 are interposed on the PTO shaft 15. by
The structure is such that the PTO shaft 15 can be freely bent and moved to allow the seedling planting device 10 to move up and down.

In configuring the lifting and lowering operation structure of the seedling planting device,
As shown in FIG. 2, a sensor float 9 placed at the left and right center of the vehicle body is attached to a seedling planting device 10 so as to be swingable around the rear end side horizontal axis X, and the tip of the sensor float 9 is attached to the seedling planting device 10. It is connected to the seedling planting device 10 via a link mechanism 17 that allows vertical movement and is biased toward the ground by a spring 18. A link mechanism 17 that swings together with the tip of the sensor float 9
one link 17a and the lifting cylinder 1
2 is interlocked with the operating part 19a of the control valve 19 for the control valve 19 via the wire 20, so that changes in the height of the seedling planting device 10 above the ground due to changes in the depth of the plowing bed can be detected by the swinging of the sensor float 9. It is configured to detect this and automatically operate the control valve 19 to maintain the seedling planting device 10 at an appropriate working height above the ground.

Further, by connecting an operating lever 21 to the operating portion 19a of the control valve 19 and holding the operating lever 21 at the automatic control position A, the automatic elevation control state described above is brought out, and the operation lever 21 is moved to the elevated position U. By operating the planting device 10, the planting device 10 is forcibly raised when driving on the road, etc., and by operating it to the fixed position N, the planting device 10 in the raised state is prevented from descending, and further, the planting device 10 is moved to the lowered position D. It is configured to allow the planting device 10 to fall under its own weight by operating the planting device 10 in the following manner.

Furthermore, the spring 18 for setting the grounding load of the sensor float 9 is interlocked and connected to an adjustment lever 23 via a wire 22, and the biasing force of the spring 18 is adjusted depending on the softness or hardness of the mud surface, thereby detecting the sensor float 9. It is configured so that the sensitivity can be changed.

The ground load adjustment structure of the sensor float 9 will be described in more detail below.

When the adjustment lever 23 is interlocked with the spring 18, the adjustment lever 23 is held at a pivot position T provided at the end of the guide hole 24, so that the biasing force of the spring 18 is maintained at approximately zero. At the same time, as the planting clutch 14 is operated to the turning position T, the planting clutch 14 is automatically disconnected, and
The adjustment lever 23, the planting clutch 14, and the differential lock device 25 are connected to the wire 2, respectively, so that the front wheel differential lock device 25 is automatically locked.
They are interlocked and connected via 6 and 27.

In other words, the sensor float 9 is equipped with a sensor float 9 for maintaining the seedling planting device 10 at a slightly higher position than the normal working height in an automatically raised and lowered state in order to reduce the mud resistance of the soil leveling float 8 when turning the mud surface by the leveling float 8. The above three operations can be performed with a single operation on the adjustment lever 23, including a power release operation, a seedling planting operation stop operation, and a deflock operation to prevent the front wheel 2 on the inside of the turn from slipping.
It is designed to improve turning maneuverability.

Incidentally, the planting clutch 14 and the deflock device 25 are connected to the planting clutch lever 2 provided in the driving section 5.
Alternatively, the differential lever 29 can be operated individually in priority to the interlocking operation with the adjustment lever 23.

To configure the sensor float 9, as shown in FIGS. 3 and 4, the sensor float 9
is formed into a substantially "T" shape in plan view in order to form notches 9b for passing the seedling planting claws 7 on both the left and right sides of the rear half thereof, and the left and right overhanging portions 9 of the front half thereof.
a is configured to be able to separate and swing freely down and down against the biasing force of the restoring spring 30 around the longitudinal axis Q with respect to the sensor float 9 main body, and the seedling planting device 10 cannot be raised manually by the operating lever 21. A stopper 31 is attached to the link mechanism 11 so that the link mechanism 11 and the sensor float 9 come into relative proximity to each other so that the stopper 31 comes into pressure contact with the overhang 9a and swings the overhang 9a downward.

In other words, by manually lifting the seedling planting device 10, the mud that has climbed onto the top surface of the sensor float 9 during the planting work can be automatically removed, thereby improving the detection accuracy of the sensor float 9 caused by the mud that has climbed on top of the sensor float 9. The structure is designed to prevent a decrease in .

The structure for adjusting the biasing force of the ground contact load setting spring 18 can be modified in various ways, and these adjustment structures are collectively referred to as the adjustment section 22.

In addition, in order to interlock and connect the adjustment section 22 and the planting clutch 14, they are connected to the planting clutch lever 2.
8, and the members that operate the adjustment part 22 and the planting clutch 14 in conjunction with each other may be collectively referred to as the operating tool 2.
It is called 3.

Furthermore, the specific interlocking structure between the adjustment part 23, the planting clutch 14, and the operating tool 23 can be changed in various ways, such as using an electric or hydraulic interlocking structure instead of various mechanical interlocking structures such as wires and rods. is possible.

The present invention is directed to various types of riding rice transplanters that are equipped with an automatic raising/lowering control mechanism for a seedling planting device based on detection of rocking of a sensor float.

[Brief explanation of drawings]

The drawings illustrate an embodiment of the riding rice transplanter according to the present invention, in which Fig. 1 is an overall side view, Fig. 2 is a schematic side view showing the lifting and lowering operation structure of the seedling planting device, and Fig. 3 is a schematic showing the soil leveling float. The plan view and FIG. 4 are sectional views taken along the - line in FIG. 3. 9...Grounding float, 10...Seedling planting device, 1
4...Planting clutch, 18...Spring, 19
...Operation unit, 22...Adjustment unit, 23...Operation tool.

Claims (1)

[Claims] 1. The operating unit 19 for raising and lowering the seedling planting device 10 with respect to the vehicle body drives the swinging grounding float 9 provided in the seedling planting device 10, which is biased toward the ground side by the spring 18, so that its posture relative to the ground is It is a riding rice transplanter that is interlocked so as to be maintained at a substantially constant level, and includes a planting clutch 14 that disconnects and connects power to the seedling planting device 10, and an adjustment section 22 that adjusts the biasing force of the spring 18. A riding rice transplanter characterized in that the rice transplanter is linked to one operating tool 23 provided on the vehicle body so that the biasing force of the spring 18 can be changed to a minimum when the planting clutch 14 is in the disengaged state.