JPS6314611A - Ground levelling apparatus of agricultural working maichine for rice field - 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 (Field of Industrial Application) The present invention relates to agricultural machines for paddy fields, such as rice transplanters and flooded seeders, and more specifically to a soil leveling device thereof.

(Prior art) Conventionally, a rice transplanter, which is an agricultural machine for paddy fields, is equipped with a wave barrier on the side of the soil leveling float to prevent the waves of muddy water that washes in from the soil leveling float from crushing adjacent seedlings that have already been planted. was there.

(Problems to be Solved by the Invention) The wave breakers provided in conventional rice transplanters were provided integrally with the soil leveling float or the body of the rice transplanter, so when the water depth of the rice field was shallow, Regardless of the depth, the lower end of the breakwater was at a constant height from the topsoil surface of the paddy field, or the height varied depending on the depth of the plowing platform, causing it to stick into the plowing platform.

This invention aims to solve these problems.

Means for Solving the Problems In a paddy field agricultural machine having a soil leveling float 7.8 for leveling the surface of a rice field, a method is adopted in which a paddy field agricultural machine is provided with a soil leveling float 7.8 for leveling the surface of a rice field, and the muddy water wave generated by the propulsion of the soil leveling float 8 is directed outward from the soil leveling float 8. A wave barrier 10 that prevents the spread of water is attached via a vertical movement mechanism, and the vertical movement mechanism is activated by a signal from a detector 14 that detects the water depth of the rice field. This soil leveling device for a rice paddy agricultural machine is constructed so that the lower end of the wave barrier 1o is deeply submerged, and conversely, the lower end of the wave barrier 1o becomes shallow when the water depth is shallow.

Embodiment A rice transplanter which is an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a drawing of a riding-type rice transplanter with the towing vehicle body section removed, and the rice transplanter 2 is attached to a towing vehicle body such as a tractor (not shown) by an elevating link 1.

Reference numeral 3 denotes a planting case, and a rotary case 5 is provided at the rear end of which a seedling planting tool 4.4 is attached.

Reference numeral 6 denotes a seedling supply table, which is supported on the upper front side of the planting case 3 so that it can be moved back and forth from side to side, and is provided to feed the placed seedlings to the seedling planting tool 4 one by one. .

Reference numeral 7.8 denotes a soil leveling float, and the rear part of the center leveling float 7 is pivoted to the lower part of the planting case 3 so that the front part can move up and down freely. is equipped with a switching valve 9 of a hydraulic system that makes the lifting link 1 movable, and the valve 9 is switched according to fluctuations in the ground pressure of the float to make the rice transplanter 2 move up and down, so that the ground pressure of the float 7 is always maintained. It is provided so that it is maintained within a certain range that is appropriate for planting work.

The leveling floats 8 are provided on the right and left sides of the center float 7 at a constant interval, and like the float 7, the front portions are provided to be freely movable up and down.

Reference numeral 10 denotes a wave barrier body, in which a plate body 10a is provided at a constant interval on the outside of the soil leveling float 8 on the side, and a shaft 11 extending in the horizontal direction is provided in the front and rear of the planting case 3 that constitutes the body. , is attached to this front and rear shaft 11.11 via a link 12.12 so as to be freely movable up and down.

Reference numeral 13 denotes a hydraulic cylinder device, which is provided between the planting case 3 and the link 12 and moves the wave barrier 10 up and down.

14 is a detector for detecting water depth, and a rotatable arm 16 is provided on a support frame 15 that is integrally attached to the front part of the planting case 3, and a float 17 is attached to the lower end of this arm 16. When the arm 16 is vertically rotated by the float 17, the amount of rotation is taken out as electric capacity.

Incidentally, the change in the electric capacity is generally performed by a pickup device incorporating a conventional potentiometer that changes the electric resistance and voltage by rotating the arm 16.

The signal value from the detector 14 is then transmitted to a reference signal generator 18.
The comparator 19 compares and extracts the signal value from the hydraulic cylinder device 13, and uses this signal to switch the hydraulic switching valve 20 that controls the operation of the hydraulic cylinder device 13, and changes the switching time depending on the magnitude of the signal. Wave barrier 10
It is configured to control the vertical height of the

During the rice planting work, the soil leveling floats 7 and 8 are propelled into contact with the surface of the topsoil of the paddy field, leveling the land, and the seedling planting tool 4 is placed on this leveling section.
takes out seedlings one by one from the seedling supply stand 6 and plants them.

During this rice planting work, the soil leveling floats 7.8 push the waves of muddy water on the surface of the topsoil outward, but this pushed muddy water wave is dammed by the wave barrier 10, and the adjacent seedlings that have already been planted are Prevent being pushed down. When the water level of the rice field is high, this wave barrier 10 is used as a float 17.
is located above, the arm 16 is swung up, the signal value from the detector 14 becomes larger than the signal value from the reference signal generator 18, and the hydraulic switching valve 20 is moved in the direction in which the piston of the hydraulic cylinder device 13 protrudes. At the same time as switching, the amount of protrusion is determined by the magnitude of the signal, and the wave barrier 10 is moved downward from the water surface in proportion to the magnitude of the signal.

Conversely, when the water level in the paddy field is low, the float 17 is positioned downward, so the arm 16 rotates downward, and the signal value from the detector 14 becomes smaller than the signal value from the reference signal generator 18, causing the hydraulic pressure to increase. The switching valve 20 is switched in the direction in which the piston of the hydraulic cylinder device 13 is retracted, and the amount of retraction is determined by the magnitude of the signal, and the wave barrier 10 is moved upward in proportion to the magnitude of the signal.

In this way, the wave barrier 10 is automatically controlled up and down according to the water depth of the rice field, and the leveling float 7.8
The waves of muddy water that rush outwards are reliably blocked and can prevent adjacent seedlings that have already been planted from being pushed down.

[Brief explanation of drawings]

The figures show one embodiment of the invention, with the first figure being a side view and the second figure being a side view.
The figure is a plan view of the main parts, and FIG. 3 is an electrical block circuit diagram. Symbols in the figure: 7.8 is a leveling float, 10 is a wave barrier, 14
indicates the detector.

Claims (1)

[Claims] In an agricultural machine for paddy fields having soil leveling floats 7 and 8 for leveling the surface of a rice field, a wave-blocking body prevents muddy water waves generated by the propulsion of the soil leveling floats 8 from spreading outward to the outside of the soil leveling floats 8. 10 is attached via a vertical movement mechanism, and the vertical movement mechanism is activated by a signal from a detector 14 that detects the water depth of the rice field, so that when the water depth is deep, the lower end of the wave barrier 10 sinks deeply, and vice versa. This soil leveling device for a rice paddy agricultural machine is configured so that the lower end of a wave barrier 10 becomes shallow when the water depth is shallow.