JPS6030613A - Float of riding type rice planter - 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 The present invention relates to a float for a walk-behind rice transplanter, and more particularly to an improvement in a float provided between a pair of left and right vertically movable driving wheels.

A conventionally well-known pair of left and right traveling drive wheels are pivotally supported on the rear end of a transmission case whose front end is attached to the rice transplanter body, and are provided so as to be movable up and down with respect to the rice transplanter body. In walk-behind rice transplanters that are equipped with floats between the wheels that move the driving wheels up and down by sensing ground pressure fluctuations, the slope of the transmission case is large in deep plowing areas at FIA fields. When the lower end touches the river surface and pushes mud, and the pushed mud flows toward the float, there is no place to escape between the float L1-1- and the wheels, and it interferes with the float, and the mud also spills onto the wheels. There were problems such as increased adhesion. For this reason,
By providing an upwardly curved curved part in the wheel-corresponding part of one float, or by dividing the float into a front part and a rear part and attaching each rear part and front part in the same way as a conventional float, There is a device that solves the above problem by creating a place for the mud to escape.

However, even in this case, if a single float is provided with a curved part, the rear part of the float will become clogged with mud, and if the float is divided into two parts, the length of the front part will be shortened. There was a problem that the vertical motion sensing operation became slow.

The present invention was developed in consideration of the above circumstances, and it improves the vertical movement sensing operation of the front 4 floats in the split flow where the float is divided into front and rear parts, and also improves the leveling of mud pushed out by the transmission case. It is an object of the present invention to provide a float for a walking rice transplanter that can perform rice transplanting well.

For this purpose, the present invention has a front float whose rear end is curved upward and whose rear end is pivoted to the rice transplanter main body, and whose front part is movable up and down and has a sensor for sensing ground pressure fluctuations. A mechanism is provided, and the rear float is configured such that its rear part is pivoted to the rice transplanter main body, and its front part is movable up and down so as to be substantially aligned with the pivot position of the rear end of the front float. It is.

The invention will now be described with reference to the illustrated embodiments.

In Figures 1 and 2, numeral 1 is the main body of the rice transplanter;
This main body 1 is equipped with an engine 2 at the front, a backward-slanting steering wheel rod 3 at the rear, and a pair of left and right running drive wheels 4 at an intermediate portion between the engine 2 and the steering wheel rod 3. . A gearbox 5 is located behind the engine 2.
Power is transmitted from the engine 2 to the gearbox 5 via a belt transmission system 6, and a hydraulic mechanism is integrally attached thereto. The proximal end of the transmission case 1 is pivotally mounted to a swollen portion provided at the lower part of the gear box 5 so as to be movable up and down, and the traveling drive wheel 4 is pivotally supported at the distal end of the transmission case 7. ing. A middle part of a balance rod 9 extending left and right is pivotally supported at the tip of the piston of a hydraulic cylinder 8 which is provided so as to protrude rearward from the upper part of the gear box 5. One end of the iron 10 is pivotally supported, and the other end is pivotally supported on the upper end of a rotating arm 11 fixed to the upper edge of the base end of the transmission case 1, and the transmission case is rotated by the expansion and contraction movement of the hydraulic cylinder 8. 7 rotates to move the running drive wheels 4 up and down.

On the front side of the control handle bar 3, a seedling stand 12 is inclined along the handle bar 3 and reciprocated at a predetermined distance in the left and right direction along guide rails 13 and 14 supported by the handle bar 3. It is set up like this. A seedling tray plate 15 is disposed at the lower end of the slope of the seedling U° table 12, and seedling outlet ports 16 are opened in the plate 15 at predetermined intervals. The planting body 17 moves vertically in a predetermined trajectory in opposition to the seedlings, and the seedlings are taken out one by one from the seedling take-out port 16 and planted on the rice field.

A front center float 18 and a rear center float 1- are located below the main body 1 between the left and right driving wheels 4, 4.
19 are arranged. Front center float 181:
', the rear part is curved upward, the left and right width gradually becomes narrower, and the whole is long, the rear end is pivoted to the main body 1 via a pivot 20, and the front part is vertically It is vertically movably connected to the main body 1 by a movable link 21, and a vertical motion sensing rod 22 is provided on the side of the vertical movable link 21, the tip of which is connected to a switching valve that switches the oil path of the hydraulic cylinder 8. The pulp switching arm 23 is pivotally connected to the end of the pulp switching arm 23. The rear part of the rear center flow 19 is pivoted to the lower part of the handlebar 3 via a bracket 24,
The tip is the rear end of the front center float 18, that is, the pivot 20
It is wrapped so as to protrude slightly forward, and its tip is connected to the main body 1 via a vertically movable link 25 so as to be vertically movable. A pair of left and right side floats 2G are disposed on the outside of the travel drive wheels 4.4.

In another embodiment of the invention shown in FIG.
The position of a is slightly shifted forward from the position of the pivot 20 in the above embodiment, and the distance p from the tip of the rear center float 19 is
This embodiment is the same as the embodiment described above, except that it is different from the embodiment described above in that it is provided in close proximity to each other.

In a walk-behind rice transplanter with such a configuration, in the field, the front and rear center floats 18 and 19 and side floats 26 are in contact with the rice field, and the traveling drive wheels 4 are in contact with the tiller. The machine is driven by a rotational drive, and seedlings are planted on the rice field leveled by the sliding of each float 18, 19, and 26 during a planting break 17. During this rice planting work, if the tiller is uneven or the rice field is uneven, the ground pressure of each float 1g, 19.26 will change and move up and down relative to the machine, causing the front pinter float 18
Then, the valve switching arm 2 is connected to the valve switching arm 2 via the vertical movement sensing rod 22.
3 rotates, the pulp is switched, and the hydraulic cylinder 8'' is expanded and contracted, and this expansion and contraction movement causes the running drive wheels 4 to move up and down.

The ground pressure of each float 18, 19, and 2θ is kept almost constant by moving the aircraft up and down.

When the depth of the tiller increases and the traveling drive wheels 4 descend significantly, the rotation of the transmission case 1 increases and its tip end enters the river surface, causing the mud pushed out by the tip to move left and right. The mud that separates and comes out on the side float 2G side is leveled out without clogging the side float 2G because there is a considerable distance between it and the side float 2G, as is clear from Figure 2.

However, the mud that came out on the center float 18.19 side will affect both floats 18.19 because the lXl1 corner of the center float 18.19 is one corner closer to the center float 18.19, but it is not shown in the tlS1 diagram. As shown in the figure, the mud that comes out is distributed between the curved part of the front center float 18 and the rear center float 19.
The flow mainly flows between the rear float 19 and the tip of the rear float 19.
is evened out by In addition, since the front float 18 is curved upward and formed long, the sensing operation of the vertical motion sensing rod 22, which is activated by vertically moving around the pivot shaft 20.20a, is stable, and accurate grounding can be achieved. The machine can be moved up and down using pressure fluctuations to perform stable 11-planting operations.

As explained above, according to the float of the walk-behind rice transplanter of the present invention, the center float provided between the transmission cases 1 and 7 of the driving wheels 4 and 4 is divided into the front float 18 and the rear float 19, and the front float The rear parts of the floats 1 to 18 are bent upward by one angle, and the rear ends are pivoted to the main body 1, and a vertical motion sensing mechanism (sensing iron 22) is provided at the front part, and the front part of the rear float 19 is Since it is arranged so that it can move up and down almost in line with the rear end pivot position fi (pivot 20.24a) of the front float, in fields where the plowing platform is deep, the traveling drive wheels go deep into the tilled soil, and the tip of the transmission case Even if the mud pushed out by the map mill float enters the center float side, it escapes between the curved part of the map mill float part and the front part of the rear float and is leveled by the rear float, and the front float forms the rear curved part. As a result, the entire float is made longer, and the front end side moves up and down stably around the rear pivot, which stabilizes the operation of the up-and-down motion sensing mechanism and keeps the ground pressure of the float almost constant, allowing stable rice planting work to be carried out. .

[Brief explanation of drawings]

FIG. 1 is a side view of the entire walk-behind rice transplanter showing an embodiment of the present invention, FIG. 2 is a plan view of the same, and FIG. 3 is a side view of the entire walk-behind rice transplanter showing another embodiment of the present invention. be. DESCRIPTION OF SYMBOLS 1...Rice transplanter main body, 2...Engine, 3...Control handle stick, 4...Traveling drive wheel, 5...Gear box, 6...Belt transmission system, 7...Transmission case, 8
... Hydraulic cylinder, 9... Balance rod, 10... Moving rod, 11... Rotating arm, 12... Seedling stand,
13.14... Guide rail, 15... Seedling support board,
16... Seedling take-out port, 11... Implant body, 18...
・Front center float, 19... Rear center float, 20.21... Pivot, 21.25... Vertical movement link, 22... Vertical movement sensing rondo, 23... Pulp switching arm, 24 ...Bracket, 2G...Side flow 1~. Patent attorney Susumu Hi

Claims (1)

[Claims] A pair of left and right traveling drive wheels are pivotally supported on the rear end of a transmission case whose 1y+ end is pivotally connected to the rice transplanter body, and are provided so as to be movable up and down with respect to the rice transplanter body, and between these left and right traveling drive wheels, In a walk-behind rice transplanter equipped with a float that senses ground pressure fluctuations and moves the driving wheels up and down, the float is divided into two parts, a front float and a rear float, and the front float has its rear part raised upward. The front part is curved and the rear end is pivoted to the rice transplanter body, and the front part can move up and down to feel ground pressure fluctuations.
A sensing mechanism is provided to detect the rear float, and the rear float
1. A float for a walk-behind rice transplanter, characterized in that the float is pivotably supported on the transplanter body and is movable up and down with the front part substantially aligned with the pivot position of the rear end of the front float.