JPH084412B2 - Paddy farm work machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a paddy field agricultural working machine such as a rice transplanter or a submerged seeder for seeding a paddy field.

[Prior art]

Conventionally, like the rice transplanter disclosed in Japanese Utility Model Publication No. 51-49301, wheels that are independently moved up and down by separate hydraulic cylinder devices are provided on the left and right sides of the machine body, and between the left and right wheels there are left and right wheels. A pair of grounded floats arranged side by side is mounted on the aircraft so that it can move up and down, and the hydraulic switch valves of the left and right hydraulic cylinder devices are switched by this separate grounded float, and the pair of left and right wheels is adjusted according to the depth fluctuation of the paddy field. When the machine is tilted to the left or right, the wheels are moved up and down independently so that the left and right ground floats switch the hydraulic switching valves on the left and right hydraulic cylinder devices to correct tilt. is there.

In addition, as disclosed in Japanese Utility Model Laid-Open No. 54-27022, a single rolling float that is free to roll is provided between the left and right wheels, and this ground float is linked to the switching valves of the pair of left and right hydraulic devices. Then, there is one that controls the left and right wheels up and down so as to correct the tilting of the body to the left and right with this single ground contact float.

[Problems to be Solved by the Invention]

The prior art Japanese Utility Model Publication No. 51-49301 has a structure in which two grounding floats are lined up between the left and right wheels and are independently moved up and down. Therefore, the distance between the left and right grounding floats is inevitable. It became narrower and it was difficult for mud soil to pass through, and the vertical movement of the grounding float did not operate properly. Especially, it was difficult to move up by the surface soil surface pressure because the grounding area of each grounding float could not be widened. In addition, the width of the grounding float is disclosed in Japanese Utility Model Laid-Open No. 54-27022 in which one grounding float is provided between the left and right wheels in a rollable manner, and the rolling is used to switch the hydraulic switching valve to correct tilting of the machine body. However, there was a problem that the wheel of the paddy field was limited, and the tilt of the airframe could not be accurately detected by this grounding float, and the wheel could not be controlled vertically correctly.

[Means for solving the problem]

In order to solve the conventional problems, the present invention is provided with left and right wheels 10a and 10b vertically movable on both left and right sides of the machine body, and one central grounding float 18 is provided between the left and right wheels 10a and 10b in a front view of the machine body. The left and right side ground contact floats 28a and 28b are disposed on the left and right outer sides of the left and right wheels 10a and 10b when viewed from the front of the machine body, and the left and right wheels 10a and 1b are moved up and down by the central ground contact float 18.
The vertical height of 0b is also changed to correct the height of the aircraft with respect to the field, and the left and right wheels are tilted by tilting the central grounding float 18 left and right.
Change the left and right relative heights of 10a and 10b to correct the left and right inclination of the aircraft and also change the left and right relative heights of the left and right wheels 10a and 10b even when the left and right side ground floats 28a and 28b are moved in the vertical direction. The agricultural working machine for paddy fields is provided with a control mechanism for correcting the lateral inclination of the machine body.

[Action effect]

This invention can move up and down on the left and right sides of the airframe.
10a, 10b are provided, and one central grounding float 18 is arranged between the left and right wheels 10a, 10b in a front view of the airframe, and the left and right side grounding floats 28 are located outside the left and right wheels 10a, 10b in a front view of the airframe.
With the a and 28b arranged, the vertical height of the left and right wheels 10a and 10b is changed by the vertical movement of the central grounding float 18 to correct the height of the aircraft with respect to the field, and the horizontal tilting of the central grounding float 18 is performed. The right and left relative heights of the left and right wheels 10a and 10b are corrected by changing the left and right relative heights of the left and right wheels 10a and 10b, and the left and right side ground contact floats 28a and 28b are moved in the vertical direction. Since a control mechanism that corrects the tilt of the aircraft by changing the left and right is provided, it is possible to widen each grounding float 18, 28a, 28b, the passage of muddy water is good, and mud clogging between floats is unlikely to occur. The left and right wheels can be accurately matched by the cooperation of the center ground float 18 and the left and right side ground floats 28a and 28b.
Up and down control of 10a and 10b can be performed, and there is an effect that the machine body can be appropriately maintained in a predetermined posture.

〔Example〕

A walk-behind rice transplanter according to an embodiment of the present invention will be described in detail with reference to the drawings.

Reference numeral 1 denotes an airframe, which has a traveling gearbox 2 at the front end and a planted gearbox 3 at the rear end. An engine base 4 is mounted on the front side of the traveling gear box 2 and has an engine 5 mounted thereon. 6 is a hydraulic pump 7a
7b, hydraulic valves 8a and 8b, and an oil tank 9 are integrally formed and are mounted on the engine base 4.

The left and right wheels 10a and 10b are used for the traveling gear box 2
Chain case 11a rotatably installed on both left and right sides of
・ It is installed on the tip side of 11b so that it can move up and down while being transmitted and rotated.

12a and 12b are hydraulic cylinder devices, which are attached to the tip side of a horizontal frame 13 in which the base of each cylinder is attached to the tip side of the engine base 4 so as to extend laterally, and the tip of each piston is attached to the left and right chain cases 11a.・ Arm 14a integrated with 11b
・ Connected to 14b.

Reference numeral 15 is a steering handle, the base of which is attached to the lower rear side of the planted gear box 3 and is extended rearward and upward in a state where the front end is divided into right and left.

Reference numeral 16 is a seedling planting tool, which is attached to a lateral portion of the planting gear box 3 by a crank and a swing arm.

Reference numeral 17 denotes a seedling tank, which is supported on the upper side of the operation handle 15 so as to be movable left and right, and is horizontally reciprocally moved by a reciprocating lateral movement mechanism in the planted gear box 3.

Reference numeral 18 denotes a central grounding float, which is disposed on the front side portion between the left and right wheels 10a and 10b, and the left and right central portion is a metal fitting 20 which can be freely rotated by a lateral pin 19 on the machine body 1 and a longitudinal direction of the metal fitting 20. Pin
It is provided with a metal fitting 22 which can be freely rotated at 21 and can be freely rolled and pitched.

Reference numerals 23a and 23b denote rotating arms, the front portion of which is pivotally supported by lateral shafts and the rear portion of which is vertically movable on both left and right sides of the engine base 4.

Reference numerals 24a and 24b are switching arms attached to the valve shafts of the hydraulic pressure switching valves 8a and 8b, and the left and right arms 24a and 24b are interlocked with the rotating arms 23a and 23b via rods 25a and 25b.

26a and 26b are push-pull type interlocking wires, the outer shaft of which is stopped at a position of a predetermined length on the engine base 4 side, and one end of the inner side is a bracket fixed to the front left and right sides of the central grounding float 18. The wires on the left side are connected to the rotating arm 23a on the left side and the wires on the right side are connected to the rotating arm 23b on the right side with a certain amount of play.

28a and 28b are a pair of left and right side ground contact floats,
It is arranged so as to extend rearward from the outer part of 10a, 10b, the rear part is attached to the steering handle 15 by a lateral shaft 29 and a metal fitting 30, and the front part is provided so that it can freely move up and down. .

Reference numerals 31a and 31b are push-pull type interlocking wires, the outer side of which is set to a predetermined length in the body 1, and the left side wire connects the left side ground float 28a and the left side rotating arm 23a to the right side wire. 31b connects the grounding float 28b on the right side and the rotating arm 23b on the right side.

In the hydraulic circuit diagram of FIG. 4, 32a and 32b are relief valves.

As described above, the central grounding float 18, the side grounding floats 28a and 28b, the interlocking wires 26a and 26b, the interlocking wires 31a and 3a.
1b, rotating arms 23a and 23b, rods 25a and 25b, switching arm 2
4a / 24b, hydraulic device case 6, and hydraulic cylinder device 12a
・ In 12b, etc., the vertical height of the left and right wheels 10a and 10b are both changed to correct the height of the aircraft with respect to the field.
It constitutes a control mechanism that corrects the lateral inclination of the aircraft by changing the left and right relative heights of 10a and 10b.

In the figure, reference numeral 33 is a bonnet, 34 is a preliminary seedling stand attached to the bonnet, and 35 is a switching valve return spring.

In the configuration of the above example, when the seedlings are stored in the seedling tank 17 and each rotating portion is transmitted by the engine 5, a pair of left and right wheels 10a.
0b rotates and propels Aircraft 1 in the paddy field.

At this time, the central grounding float 18 and the left and right side grounding floats 28a and 28b both come into contact with the surface soil surface of the paddy field and slide. Also, the seedling planting equipment 16, 16 ... moves up and down and reciprocates laterally from side to side, and divides the seedlings into individual seedlings from each seedling tank 17, and plant them one after another on the soil surface of the paddy fields.

During such seedling planting work, when the paddy field of the paddy field becomes deep, the left and right wheels 10a and 10b sink deeply, so that the ground contact floats 18, 28a and 28b are pushed up by the surface soil surface of the paddy field. Then, the inners of the interlocking wires 26a, 26b, 31a, 31b relax, and the left and right hydraulic switching valves are pulled by the tension of the switching valve return spring 35 or the pushing force of the wires.
8a and 8b will switch the piston of the hydraulic cylinder device 12a and 12b to the projecting side. Therefore, as the chain cases 11a and 11b are both rotated downward, the wheels 10a and 10b move downward to move the machine body 1 upward, and the wires are pulled until the hydraulic pressure switching valves 8a and 8b are returned to neutral. 1 moves up.

When the cultivator becomes shallower, conversely to the above, each wire 26a ・ 2
The inner part of 6b / 31a / 31b is pulled, so spring 35
The switching arms 24a and 24b are rotated against the pressure, and the hydraulic switching valves 8a and 8b are switched in the opposite direction.
The pistons 12a and 12b are retracted and the wheels 10a and 10b are moved upward.

Also, when one of the tillers becomes shallow or deep and the body 1 tilts, the central grounding float 18 rolls around the pin 21 and the interlocking wire on the side pushed up loosens, while the other The wire will be pulled. In addition, the left and right side ground contact floats 28a and 28b are slackened by the wire connected to the float that is also pushed up.
The other wire is pulled. For this reason, the hydraulic pressure switching valves 8a and 8b are individually switched in the opposite direction, the wheels on the side where the platter becomes shallower move upward, and the wheels on the side where the platter becomes deeper move downward to restore the machine body 1 to the horizontal state. It will be. At this time, the central grounding float 18 is a rolling type and is composed of one float.
8a and 8b are switched, the side ground float 28a and 28b are wheels 10a
・ Because the hydraulic switching valves 8a and 8b are switched on the outside of 10b by separate vertical movements, the hydraulic switching valve 8a can be precisely operated with the cooperation of three grounding floats of different configurations to minimize mud pushing. Since 8b will be switched, the aircraft 1 will not run while leaning left and right. Further, even when the steering handle 15 is lifted during turning, the turning can be performed while being automatically controlled accurately by the rolling action of the front ground contact float 18.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a side view of a walk-behind rice transplanter which is an example of the present invention, FIG. 2 is a plan view with a part thereof omitted, and FIG. FIG. 4 is a hydraulic circuit diagram showing an operation mechanism of essential parts, and FIG. Reference numeral 1 in the figure, 1 is a machine, 8a and 8b are hydraulic switching valves, and 10a and 1
Reference numeral 0b is a wheel, 12a and 12b are hydraulic cylinder devices, 18 is a central grounding float, and 28a and 28b are side grounding floats.

Claims (1)

[Claims] 1. Left and right wheels 10 which are vertically movable on both left and right sides of the body.
a.10b is provided, and one central grounding float 18 is arranged between the left and right wheels 10a and 10b in a front view of the airframe, and the left and right side grounding floats 28a are located outside the left and right wheels 10a and 10b in a front view of the airframe.
・ With 28b arranged, the vertical height of the left and right wheels 10a and 10b are both changed by vertical movement of the central grounding float 18 to correct the height of the aircraft with respect to the field, and the central grounding float 18 is tilted to the left and right. The left / right relative height of the left / right wheels 10a ・ 10b is corrected by correcting the left / right relative height of the left / right wheels 10a ・ 10b, and the left / right relative height of the left / right wheels 10a ・ 10b is adjusted even when the left / right side ground contact floats 28a ・ 28b are moved in the vertical direction. An agricultural working machine for paddy fields, which is provided with a control mechanism that is changed to correct the lateral inclination of the machine body.