JPH05968B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a walking rice transplanter equipped with a body tilt correction control device.

[Conventional technology and its issues]

As this type of conventional technology, Utility Model Publication No. 51-49301
As shown in the publication, there are two types: one that detects the inclination of the aircraft using the left and right ground sensors installed in the center of the aircraft and controls the vertical movement of the wheels to correct the horizontal inclination of the aircraft; There is one that corrects the left and right inclination of the aircraft by controlling the vertical movement by changing the ground pressure of the left and right side ground leveling floats. However,
In the former method, the left and right tilt of the aircraft is detected relatively at the center of the aircraft, so there are many cases where the tilt of the aircraft cannot be detected accurately and the aircraft tilt correction control cannot be performed properly. It was not of practical use. In addition, in the latter case, the left and right side leveling floats are located on the outside of the wheels, and when planting seedlings along the ridge, the left and right side leveling floats may unexpectedly ride on the ridge. There was a risk of false detection.

[Means to solve the problem]

In order to solve the above-mentioned problems of the conventional example, the present invention is provided with left and right wheels 9a and 9b that are movable up and down while transmitting rotation on both the left and right sides of the aircraft body 1, and wheels 9a and 9b provided on the outside of the left and right wheels 9a and 9b. In a walk-behind rice transplanter equipped with seedling planting tools 30, 30 for planting seedlings in a field leveled by left and right side leveling floats 32a, 32b, left and right ground sensors detect the horizontal inclination of the machine body with respect to the field. The left and right outer parts of 20a and 20b are the left and right side leveling floats 32a,
An aircraft tilt correction control device is provided, which is arranged so as to overlap the inner side of the vehicle body 32b when viewed from the front of the aircraft, and corrects the aircraft inclination by moving the wheels 9a and 9b up and down based on the aircraft inclination detected by the left and right ground sensors 20a and 20b. This is a walking-type rice transplanter.

[Function and effect of the invention]

According to this invention, the left and right side leveling floats 32
Since the left and right ground sensors 20a and 20b detect the inclination of the aircraft while the aircraft is supported at points a and 32b, the detection is accurate and stable, and the inclination correction control of the aircraft can be performed appropriately to ensure good rice planting work. can be done.

In addition, even if a part of the side leveling float rides on the ridge, the left and right ground sensors 20a and 20b accurately touch the soil surface and move up and down, allowing the wheels to accurately control the up and down movement. sensor 2
0a and 20b are arranged so that their left and right outer parts overlap with the inner parts of the left and right side leveling floats 32a and 32b when viewed from the front of the aircraft, so the inclination of the aircraft can be accurately detected and the aircraft inclination correction control can be performed appropriately. You can do rice planting work.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

1 is the fuselage, with a traveling transmission case 2 attached to the front end and a planting transmission case 3 attached to the rear end.
is attached, and an engine stand 4 is fixed to the front part of the traveling transmission case 2.

5 is an engine, which is placed on the engine stand 4.

Reference numeral 6 denotes a control handle, the base of which is fixed to the planting mission case 3, and is tilted so that the control grip on the tip side is positioned above the rear end.

Reference numerals 7a and 7b denote chain cases, and metal parts 8 are pivotally connected to the outer ends of boss portions 2a and 2b inside the drive shaft that protrude from both left and right sides of the traveling transmission case 2.
The base portions are pivotally attached to a and 8b so that the distal ends thereof face rearward, and the chain cases 7a and 7b are provided so as to be freely movable up and down.

9a and 9b are wheels, and the chain case 7a,
It is provided so as to be rotatably supported by a shaft on the distal end side of 7b.

Reference numeral 10 denotes a hydraulic system, which is composed of the hydraulic circuit shown in FIG. 3, in which oil from one hydraulic pump 11 is divided into two by a branch valve 12 and sent to separate hydraulic switching valves 13a and 13b. , hydraulic cylinder devices 14a, 14b are configured to be operated. 15 is an oil tank, and 16 is a relief valve. This hydraulic system 10 is mounted on the upper part of the traveling transmission case 2.

17a, 17b are hydraulic cylinder devices 14a,
With the piston 14b, rods 19a, 1 are attached to the arms 18a, 18b attached to the metals 8a, 8b.
9b is also connected, and when the piston protrudes, the chain case is rotated downward to move the wheels 9a, 9b downward, and when the piston retracts, the wheels 9a, 9b move upward.

Reference numerals 20a and 20b are left and right ground sensors, and these two ground sensors 20a and 20b are mounted on the aircraft 1 so that the front side or the rear side can move freely up and down even if it is small.
installed on. That is, the pins 22a and 2 are attached to the supporting frame 21a or 21b, which is fixed to the fuselage 1 on the rear side.
2b, and the distal end side is attached to the engine stand 4 by links 23a and 23b that can be expanded and contracted up and down, and left and right ground sensors 20a and 20b are attached to be able to move up and down. In addition, left and right ground sensors 20a,
The left and right outer parts of 20b are the left and right side leveling floats 3.
It is arranged so as to overlap with the inner parts of 2a and 32b when viewed from the front of the fuselage.

27a and 27b are interlocking rods, and the ground sensor 20
a and the switching valve 13a, and the earth leveling float 20b and the switching valve 13b, and when the ground pressure of the ground sensors 20a, 20b increases and moves upward, the pistons 17a, 17b are switched to the protruding side, On the other hand, when the vehicle becomes lower and moves downward, the oil in the cylinder is switched so as to return to the oil tank 15, and the wheels 9a and 9b are automatically controlled up and down.

In this way, the left and right wheels 9a, 9b, the left and right ground sensors 20a, 20b, the interlocking rods 27a, 27b, the hydraulic device 10 (left and right switching valves 13a, 13b, the hydraulic pump 11, the hydraulic cylinder devices 14a, 14
b) etc. constitutes an aircraft tilt correction control device that corrects the tilt of the aircraft body.

Reference numeral 29 denotes a rice transplanting device, which consists of four seedling planting tools 30 lined up on the left and right sides and a seedling tank 31 that reciprocates from side to side. The seedling tank 31 is supported on the control handle 6 so as to be freely movable left and right, and is also interlocked with the left and right reciprocating mechanism inside the planting mission case 3.

32a and 32b are side leveling floats,
It is located on the outer side of the left and right wheels 9a, 9b, and its inner front part extends inward, and is provided so that the seedling planting position by the seedling planting fixture 30 at the outer end is leveled, and the rear part is pivoted to the control handles 6, 6. and the front part is chain case 7a,
It is attached so as to be vertically movable via links 33, 33 attached to 7b. As described above, the inner front side portions of the side leveling floats 32a and 32b are fitted inside the outer ends of the ground sensors 20a and 20b, so that they partially overlap when viewed from the front.

In the figure, the symbols 34 and 35 indicate a fuel tank and a bonnet, respectively.

In the configuration of the above example, the walking rice transplanter is placed in the paddy field, the seedlings are placed in the seedling tank 31, and the engine 5 is turned on.
When each rotating part is driven, the left and right wheels 9a, 9b are grounded on the tiller surface and rotated by transmission, and the left and right ground sensors 20a, 20b and the left and right side leveling floats 32 are driven.
a and 32b are propelled in contact with the topsoil surface Y of the paddy field.

In a field where the depth from the topsoil surface Y to the plowing surface is deep, both the left and right ground sensors 20a, 20b are pushed upward, and the hydraulic switching valves 13a, 13b are switched to the piston 1 via the interlocking rods 27a, 27b.
7a, 17b are switched to the protruding side, thereby, the rods 19a, 19b and the arms 18a, 18
b. Wheels 9a, via chain cases 7a, 7b;
Press 9b against the tiller surface to propel the machine.

On the other hand, in shallow fields, the ground sensors 20a, 20
b is suspended, the hydraulic switching valves 13a and 13b are switched to return the oil in the cylinder to the oil tank 15, and the wheels 9a and 9b move upward under the weight of the aircraft, ensuring a secure grounding. It is propelled with the sensors 20a and 20b in contact with the ground.

In addition, if the left and right plowing depths fluctuate,
tilts left and right, but at this time, the left or right ground sensors 20a, 20b deviate from the predetermined appropriate ground pressure and move upward or downward; in this case, too, the left and right switching valves 13a Or 13
b is switched independently and only the left wheel 9a or the right wheel 9b is controlled up and down, and the aircraft 1
Correct the left and right tilt of.

In this way, in either case, the aircraft 1 is propelled while the left and right ground sensors 20a, 20b are maintained at appropriate ground pressures. And, the rice transplanting device 29 attached to this machine 1
However, seedlings are planted one by one on topsoil surface Y. That is,
Seedling planting tool 30 from a seedling tank 31 that reciprocates left and right
divides the seedlings and plants them one after another on the topsoil surface.

Rice planting work is carried out in this way, but the left and right ground sensors 20a, 20b detect the tilt of the aircraft while the aircraft is supported by the left and right side leveling floats 32a, 32b, so the detection is accurate and stable. Yes, the tilt correction control of the aircraft can be performed properly. In addition, even if a part of the side leveling float rides on the ridge, the left and right ground sensors 20a and 20b accurately touch the soil surface and move up and down, allowing the wheels to accurately control the up and down movement. Since the sensors 20a and 20b are arranged so that their left and right outer parts overlap with the inner parts of the left and right side leveling floats 32a and 32b when viewed from the front of the aircraft, the inclination of the aircraft can be accurately detected and the aircraft inclination correction control can be performed appropriately. Good rice planting work is possible.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a side view, FIG. 2 is a plan view, and FIG. 3 is a hydraulic circuit diagram. Symbols in the figure: 1 is the aircraft body, 3 is the planting mission case, 9a, 9b are the left and right wheels, 10 is the hydraulic system,
13a, 13b are left and right switching valves, 20a, 20
b is a left and right ground sensor, 29 is a rice transplanting device, 30 is a seedling planting tool, 31 is a seedling tank, and 32a, 32b are left and right side soil leveling floats.

Claims (1)

[Claims] 1. Left and right wheels 9a, 9b that can be moved up and down while being rotated by transmission are installed on both the left and right sides of the machine body 1, and a farmland is leveled with left and right side leveling floats 32a, 32b provided on the outside of the left and right wheels 9a, 9b. In a walk-behind rice transplanter equipped with seedling planting tools 30 and 30 for planting seedlings, the left and right ground sensors 20a and 20b, which detect the horizontal inclination of the machine with respect to the field, are connected to the left and right side ground leveling floats. 32a,
An aircraft tilt correction control device is provided, which is arranged so as to overlap the inner side of the vehicle body 32b when viewed from the front of the aircraft, and corrects the aircraft inclination by moving the wheels 9a and 9b up and down based on the aircraft inclination detected by the left and right ground sensors 20a and 20b. A walking rice transplanter with the following features: