JPS5820083Y2 - Float in walking rice transplanter - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a float disposed at the lower part of the rice transplanter main body.

Conventionally, this type of float is located at the bottom of the rice transplanter body, and from the perspective of maintaining stability of the machine body, it is configured so that almost the entire front and back sides of the float are in contact with the ground on a circular surface. Although the area is wider and the aircraft is more stable, the mud at the front part is pushed out and the sliding resistance increases, making the wheels more likely to slip, making it difficult to maintain sufficient aircraft stability. When moving up and down, the ground contact area is large, so the ground pressure that acts on it is also dispersed, making the up and down movement more pure.
The wheels move up and down depending on the depth of the tiller, and it is not possible to move up and down quickly and reliably to adapt to the irregularities and ups and downs of the plowed field surface. Another drawback was that it was difficult to control.

The present invention was developed in view of the above circumstances, and its purpose is to focus on the fact that the drive reaction force of the wheels strongly acts on the rear of the rice transplanter, and to do so within a range that does not impair the ground leveling function and machine stability function. By reducing the ground contact area at the front of the float, the extrusion of circular mud is reduced, making it possible to keep the aircraft more stable, and the overall reaction force against the ground pressure acting on the float is stronger and acts near the wheels. In this way, the float moves up and down according to the depth of the tiller,
The machine quickly and reliably adapts to the irregularities and ups and downs of the plowed rice field, moving up and down sensitively, and the wheels reliably move up and down to maintain the machine in a stable state, enabling highly accurate rice planting work. The present invention provides a float for automatic control in a walking rice transplanter.

In order to achieve this purpose, the float of the present invention is designed so that the first half of the float, which is located in front of the area around the axle of the wheel, is separated from the rice field, so that only the second half of the float is in contact with the rice field, and the first half of the float is placed in contact with the rice field. The vehicle is characterized by a sensing mechanism that moves the wheels up and down.

Embodiments of the present invention will be described below with reference to the drawings.

In the figure, numeral 1 is the main body of the rice transplanter, and there are wheels 2 on both the left and right sides.
However, a float 3 is arranged at the bottom, an engine 1 is mounted at the front part, and a planting device 5 is installed at the rear part.

The wheel 2 is pivotally supported on the free end side of a swing arm 6 which also serves as a chain case, and the base end side of the arm 6 is connected to the rice transplanter main body 1.
is rotatably supported via a shaft 7.

One end of a connecting arm 8 is fixed to the swinging arm 6, and the other end of this arm 8 is connected to a hydraulic device 10 via a connecting rod 9.
is connected to the piston rod 10a of the piston rod 1.
The swing arm 6 is rotated by the expansion and contraction of 0a, and the vertical movement of the wheel 2 is adjusted.

The float 3 is provided in the front-rear direction at the bottom of the rice transplanter main body 1, and is bent at an intermediate portion substantially corresponding to the axle 11 of the wheel 2 so that its front half 3a faces diagonally upward. The first half portion 3a does not come into contact with the circular surface, and only the second half portion 3b comes into contact with the circular surface, and the width of the rear end portion is narrow.

The rear part of the float 3 is rotatably supported on the rice transplanter main body 1 by a shaft 13 via a bracket 12 erected thereon, and the front part of the float 3 expands and contracts up and down and also serves as a vertical motion sensing mechanism. It is connected via a link 14 to a tension rod 16 that is in contact with a belt transmission system 15 that drives the pump of the hydraulic device 10, and operates the hydraulic device 10 in accordance with the vertical movement of the float 3 to adjust the wheel 2 up and down. It is supposed to be done.

The planting device 5 includes a seedling platform 19 provided at an angle along the handle 18, a seedling receiving plate 20 provided with a seedling outlet (not shown) at the lower end of the slope of the seedling platform 19, and the seedling outlet. The planter is provided with a planting body 21 which moves up and down in front of the tree, cuts out seedlings into single plants from a seedling take-out port, and plants the seedlings in a circular shape.

The seedling platform 19 is supported on a guide rail 22 provided on the handle 18, receives power from a moving rod 23, moves reciprocatingly in the left and right direction of the rice transplanter body 1 at a predetermined stroke, and sequentially loads the stored seedlings. It is designed to be placed facing the seedling outlet.

In such a configuration, the wheels 2 are driven as a tiller, the float 3 is in contact with a circular surface, and the planting device 5 is driven.
The planting work is carried out by

At this time, the first half 3a of the float 3 is inclined upward, and only the second half 3b of the float 3, which buttons away from the circular surface, contacts the circular surface.

As a result, the ground contact area of the float 3 is almost halved, and the extrusion of mud from the rice field, especially when the machine turns, is reduced, resulting in less sliding resistance, and the reaction that occurs on the rice transplanter body 1 due to the drive of the wheels 2. The force, that is, the force toward the rear side of the rice transplanter main body 1 is properly received and stopped by the rear half portion 3b of the float 3, so that the stability of the rice transplanter is not impaired.

Of course, if the aircraft is tilted forward, use the front half 3a.
also supports it by touching the ground on a circular surface.

In addition, if the wheels 2 separate from the tiller depending on the depth of the tiller, or if the machine is lifted high from the circular surface, or if there are irregularities on the circular surface,
If there are ups and downs, the float 3 will move along the shaft 13 accordingly.
The front end 3a swings up and down about the piston rod 10a, and the pump of the hydraulic system 10 is driven or stopped via the link 14 and the tension rod 16.
is expanded and contracted, and the wheel 2 is adjusted downward to follow the plowing platform. However, in the present invention, since the ground contact area of the float 3 is halved as described above, its ground pressure is lower than the plowing plate. When the wheels move up and down depending on the depth of the field, they respond sensitively to irregularities in the field surface.Moreover, the rear end of the rear half of the float is narrow in the left and right direction and has a small area, making it difficult to contact the ground. Because the reaction force on the float due to the pressure acts strongly on the whole around the wheels, the float moves up and down quickly and reliably adapting to the up-and-down movement of the wheels, as well as unevenness and undulations of the field surface. , the wheels are reliably moved to a predetermined height, and the machine body is maintained in a stable state for stable planting.

As described above, in the present invention, the first half of the float separates from the circular surface from the position corresponding to the wheel, and only the second half touches the rice field, so the ground contact area of the float is small, and less mud is pushed out. In addition, the sliding resistance is extremely low, preventing wheel slippage, keeping the aircraft stable, and the float's overall reaction force against the ground pressure centered around the wheels is strong. , it moves up and down quickly and reliably, adapting to the vertical movement of the wheels, unevenness of the circular surface, ups and downs, etc., and automatically controls the wheels to a predetermined height via the sensing mechanism, performing highly accurate rice transplanting work. can do.

[Brief explanation of drawings]

FIG. 1 is a side view of a rice transplanter showing an embodiment of the present invention, and FIG. 2 is a bottom view of FIG. 1. 1... Rice transplanter body, 2... Wheels, 3... Float, 3a... First half part, 3b... Second half part, 4...
Engine, 5... Planting device, 6... Rocking, 7.
...Axis, 8...Connecting arm, 9...Connecting rod, 10...
・Hydraulic system, 10a... Piston rond, 11...
Axle, 12...Bracket, 13...Axle, 14...
- Link, 15... Belt transmission system, 16... Dension rod, 18... Knoll handle, 19... Seedling mounting stand, 20... Seedling receiving plate, 21... Planting body, 22 ...
Guide rail, 23... moving rod.

Claims (1)

[Scope of utility model registration request] A single float extending in the front and back direction of the rice transplanter body is disposed at the bottom of the rice transplanter body so that it can move up and down, and wheels that can move up and down in relation to the up and down movement of the float are provided on the rice transplanter body. In a walk-behind rice transplanter that drives wheels and slides on a circular surface with the float, the float separates the front half of the wheel located in front of the periphery of the wheel position from the circular surface, and separates the rear half of the float from the circular surface. The float is formed so that it is grounded on the rice field, and the first half of this float is
A float for automatic control in a walking rice transplanter, characterized by being equipped with a sensing mechanism that moves the wheels up and down.