JPH04356118A - Rice transplanter - Google Patents

Abstract

PURPOSE:To provide a rice transplanter capable of accurately detecting the inclination of the machine body, driving the machine body while adequately correcting the inclination of the machine body and keeping the seedling transplantation depth to the optimum level. CONSTITUTION:Right and left soil-preparation floats are placed at the right and left sides of a middle soil-preparation float placed in the middle of the machine body in the direction of width to perform the soil-leveling of the outermost seedling transplantation position with the right and left soil-preparation floats. Driving wheels are provided in a state freely movable in vertical direction relative to the machine body. In the rice transplanter having the above structure, the lateral inclination of the machine body relative to the field surface is detected by the right and left soil-preparation floats for performing the soil- leveling of the outermost seedling transplantation position. The driving wheels are lifted or lowered according to the machine body inclination signals transmitted from the right and left soil-preparation floats by an apparatus for correcting and controlling the inclination of the machine body.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice transplanter equipped with a machine body tilt correction control device.

0002

[Prior art] This type of conventional technology is
As shown in Japanese Patent No. 49301, there is a vehicle that detects the inclination of the aircraft body using left and right floats provided inside the running wheels and controls the vertical movement of the running wheels in order to correct the left and right inclination of the aircraft body.

0003

[Problem to be Solved by the Invention] In the conventional example described above, the left and right tilt of the fuselage is detected at a relatively central part of the fuselage inside the running wheels, so the tilt of the fuselage can be accurately detected. However, there were many cases where the aircraft tilt correction control could not be performed properly, and it could not be put to practical use.

0004

[Means for Solving the Problems] In order to solve the problems of the above-mentioned prior art, the present invention provides left and right leveling floats on both sides of a central leveling float provided at the center in the left-right direction of the aircraft. A rice transplanter configured to level the outermost seedling planting position with left and right leveling floats and equipped with running wheels that can move up and down relative to the machine body. The present invention is characterized by being equipped with a machine body tilt correction control device that detects the horizontal tilt of the machine body with respect to the field scene using a float, and corrects the machine body tilt by moving the running wheels up and down based on the machine body tilt detection of the left and right leveling floats. This is a rice transplanter.

[0005]

[Operations and Effects of the Invention] According to the present invention, the left and right leveling floats for leveling the outermost seedling planting position are configured to detect the horizontal inclination of the machine body with respect to the field, so that when the machine body is tilted, The horizontal tilt of the machine with respect to the field scene in front of the outermost seedling planting position, which is most adversely affected, is detected, and the machine tilt can be detected properly.
It can be propelled while accurately controlling the inclination of the aircraft, and the seedling planting depth can be set appropriately.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. Reference numeral 1 denotes a fuselage body, with a running transmission case 2 attached to the front end, a planting transmission case 3 attached to the rear end, and an engine stand 4 fixed to the front part of the running transmission case 2. 5 is an engine, which is placed on the engine stand 4.

6 is a control handle, and transmission case 3 for planting
The base is attached to the base, and the tip is tilted so that the control grip on the tip side is at the upper rear. 7a and 7b are left and right transmission cases, the bases of which are pivoted to metals 8a and 8b that are pivotally attached to the outer ends of the boss parts 2a and 2b inside the drive shaft that protrude on both left and right sides of the traveling transmission case 2, and the tips are rearwardly mounted. The left and right transmission cases 7a and 7b are provided so as to be freely movable up and down.

[0008] Numerals 9a and 9b are traveling wheels, which are rotatably supported on the front ends of the left and right transmission cases 7a and 7b. Next, to explain the aircraft inclination correction control system, reference numeral 10 denotes a hydraulic system, which is composed of the hydraulic circuit shown in FIG. Another hydraulic switching valve 13a.
13b, and the hydraulic cylinder devices 14a and 14b are operated. 15 is an oil tank, 1
6 indicates a relief valve. This hydraulic system 10 is mounted on the upper part of the traveling transmission case 2.

17a and 17b are hydraulic cylinder devices 14
The pistons a and 14b are connected by rods 19a and 19b to the arms 18a and 18b attached to the metals 8a and 8b, and when the pistons protrude, the transmission case is rotated downward and the running wheels 9a and 9b are moved downward. When the piston moves and the piston retracts, the running wheels 9a and 9b move upward.

Reference numerals 20a and 20b are left and right leveling floats, which are arranged side by side between the traveling wheels 9a and 9b, and both of these leveling floats 20a and 20b are attached to the body 1 so that the front side can move freely up and down. ing. That is, the pin 22a is attached to the support frame 21a or 21b whose rear side is fixed to the fuselage 1.
22b, and the tip side is attached to the engine stand 4 to links 23a and 23b which can be expanded and contracted up and down, and left and right leveling floats 20a and 20b are attached to be able to move up and down.

[0011] Reference numerals 27a and 27b are interlocking rods, which interlock the earth leveling float 20a and the switching valve 13a, and also the earth leveling float 20b and the switching valve 13b, so that the ground pressure of the earth leveling floats 20a and 20b increases and they move upward. When this occurs, the pistons 17a and 17b are switched to the protruding side, and when the pistons 17a and 17b move downward, the oil in the cylinder is switched so that it returns to the oil tank 15, and the traveling wheels 9a and 9b are automatically controlled up and down. are doing.

Reference numeral 29 denotes a rice transplanting device, which consists of a seedling planting rod 30 and a seedling tank 31 that reciprocates from side to side, and the seedling planting rod 30 is attached to the planting transmission case 3 with a crank and a swing arm. The seedling tank 31 is movably supported on the control handle 6 and is interlocked by a left-right reciprocating mechanism within the planting transmission case 3. 32a and 32b are wheel mark erasing floats, which are attached to the rear support frame 33 and 32a and 32b, respectively, which are attached to the control handles 6 and 6.
33, the front part is attached so that it can move up and down.

Reference numeral 34 denotes a central soil leveling float, the rear part of which is formed into a bifurcated shape with its rear extending further back than the left and right leveling floats 9a and 9b, and a seedling planting rod 30 at the central portion is installed in the notched groove at the center. It is set up so that seedlings can be planted by intervention. The center leveling float 34 has a rear portion attached to the machine frame 1 with a lateral pin, and a front portion attached to the machine frame 1 with an expansion/contraction link so as to be freely movable up and down.

In the figure, the symbols 35 and 36 indicate a fuel tank and a bonnet, respectively. In the configuration of the above example, when the working machine is put into a paddy field, seedlings are loaded in the seedling tank 31, and each rotating part is driven by the engine 4, the left and right running wheels 9a and 9b are grounded on the tiller surface A and rotated by transmission. , left and right leveling floats 20a
- 20b, the central leveling float 34, and the wheel mark erasing floats 32a and 32b are propelled in contact with the topsoil surface B of the paddy field.

When the depth from the topsoil surface B to the plowing surface A increases, both the left and right soil leveling floats 20a and 20b are pushed upwards and the hydraulic switching valves 13a and 13b are activated via the interlocking rods 27a and 27b. Pistons 17a and 17b
The rods 19a and 19a are switched to the protruding side.
19b, arms 18a/18b, left and right transmission case 7a/
Lower the running wheels 9a and 9b via 7b to reach the tilling surface A.
It is controlled so that the planting depth is constant by pressing the machine to correct the proper position.

On the other hand, in shallow fields, the leveling float 20a
Since the cylinder 20b is suspended, the hydraulic switching valve 13a is set so that the oil in the cylinder is returned to the oil tank 15.
- 13b is switched, and therefore the traveling wheels 9a and 9b move upward in response to the weight of the aircraft, and the ground leveling floats 20a and 20b
is controlled so that it is properly grounded. Also,
When the left and right plowing depths change, the machine body 1 tilts to the left and right, but at this time, the left or right soil leveling float 20a
・20b deviates from the predetermined appropriate ground pressure and moves upward,
Although the left and right switching valves 13a are moved downward, in this case as well, the left and right switching valves 13a
Alternatively, 13b may be switched independently to vertically control only the left running wheel 9a or the right running wheel 9b to correct the horizontal inclination of the aircraft body 1.

In this way, in either case, the aircraft 1 is propelled while the left and right ground leveling floats 20a and 20b are maintained at appropriate ground pressure. Then, the rice transplanting device 29 attached to this machine body 1 plants seedlings one by one onto the topsoil surface B. That is, the seedling planting rod 30 divides the seedlings from the seedling tank 31, which reciprocates from side to side, and plants them one after another onto the topsoil surface.

[0018] Seedling planting work is carried out in this way,
Even if the front parts of the ground leveling floats 20a and 20b are small, they extend widely outward, and although they are located between the left and right running wheels 9a and 9b, they touch the ground over a wide area, so the sensing function is high and the floats are stable. Sensing is obtained and the aircraft 1 can be reliably propelled. In addition, a single center leveling float 34 is provided between the left and right leveling floats 20a, 20b which are linked to the switching valves 13a, 13b as a plurality of leveling floats. Since it is located further back than the rear end of 9b and has a large ground contact area, the central ground leveling float 34 can receive the drive reaction force of the traveling wheels and prevents the aircraft 1 from rolling unnecessarily. Able to run stably.

In particular, the machine 1 relative to the field scene is operated by the left and right soil leveling floats 20a and 20b for leveling the outermost seedling planting position.
Since the structure is configured to detect the horizontal tilt of the machine body 1, the horizontal tilt of the machine body 1 with respect to the field scene in front of the outermost seedling planting position, which would be most adversely affected if the machine body 1 tilts, is detected. , the inclination of the aircraft can be properly detected, the aircraft can be propelled while accurately controlling the inclination of the aircraft, and the seedling planting depth can be set appropriately.

[Brief explanation of the drawing]

[Fig. 1] Overall side view showing an embodiment of the present invention

[Fig. 2] Overall plan view showing an embodiment of the present invention

[Figure 3] Hydraulic circuit diagram

[Explanation of symbols]

1 Aircraft
2 Transmission case for traveling 3 Transmission case for planting
4 Engine stand 5 Engine
6 Control handle 7a Left transmission case
7b Right transmission case 9a Left running wheel
9b Right running wheel 10 Hydraulic system
20a Left leveling float 20b Right leveling float

Claims (1)

[Claims] [Claim 1] Left and right leveling floats are provided on both left and right sides of a central leveling float provided at the center in the left-right direction of the aircraft,
In a rice transplanter configured to use the left and right soil leveling floats to level the outermost seedling planting position, and equipped with running wheels that can move up and down relative to the machine body, the left and right leveling floats level the outermost seedling planting position. The machine is characterized by being equipped with a machine body tilt correction control device that detects the horizontal tilt of the machine body with respect to the field scene using the soil leveling float, and corrects the machine body tilt by moving the running wheels up and down based on the machine body tilt detection of the left and right soil leveling floats. A rice transplanter.