JPH04356116A - rice transplanter - 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]

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 machine that detects the inclination of the aircraft body using left and right ground sensors provided in the center of the aircraft body, and controls the vertical movement of the running wheels to correct the left and right inclination of the aircraft body.

0003

[Problems to be Solved by the Invention] In the above-mentioned conventional example, since the left and right tilt of the aircraft is detected relatively at the center of the aircraft, the tilt of the aircraft cannot be accurately detected and the aircraft tilt cannot be corrected. There were many cases where control could not be performed properly, and this method could not be put to practical use.

0004

[Means for Solving the Problems] In order to solve the problems of the prior art described above, the present invention provides a center leveling float 34 and left and right leveling floats 32a and 32b at the center and both left and right sides of the machine in the lateral direction. In a rice transplanter equipped with running wheels 9a and 9b that are movable up and down with respect to the machine body, a field surface is provided outside the central soil leveling float 34 and inwardly from the outer sides of the left and right leveling floats 32a and 32b. Left and right ground sensors 20 that detect the horizontal tilt of the aircraft relative to
a and 20b are provided, and the left and right ground sensors 20a and 20b are provided.
This rice transplanter is characterized by being equipped with a machine body tilt correction control device that corrects the machine body inclination by moving the traveling wheels 9a and 9b up and down based on the machine body tilt detection.

[0005]

According to the present invention, the machine body is supported by the center grading float 34 and the left and right grading floats 32a and 32b, that is, the center grading float 34 and the left and right grading floats 32a and 32b support the aircraft body. Since the left and right ground sensors 20a and 20b detect the inclination of the machine body on the inside supported by 32b, the detection is accurate and stable, and the inclination correction control of the machine body can be properly performed to perform good rice planting work. Can be done.

[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 ground sensors, which are arranged in parallel between the running wheels 9a and 9b.
Both of these ground sensors 20a and 20b are attached to the aircraft body 1 so that the front side can move freely up and down. That is, the pin 2 is attached to the supporting frame 21a or 21b, which is fixed to the fuselage 1 on the rear side.
2a and 22b, and the tip side is attached to the engine stand 4 to 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.

Reference numerals 27a and 27b are interlocking rods, which interlock the ground sensor 20a and the switching valve 13a, and also the ground sensor 20b and the switching valve 13b, so that the ground pressure of the ground sensors 20a and 20b increases, causing upward movement. 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. Reference numerals 32a and 32b are left and right leveling floats with no wheel marks, and the front portions are attached to rear support frames 33, 33 attached to the control handles 6, 6 so as to be movable up and down.

Reference numeral 34 denotes a center leveling float, the rear part of which is formed into a bifurcated shape with its rear extending further back than the left and right ground sensors 9a and 9b, and a seedling planting rod 30 at the center 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 ground sensors 20a
- 20b, the central leveling float 34, and the leveling 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 ground sensors 20a and 20b are pushed upward, 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 ground sensor 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 the traveling wheels 9a and 9b move upward in response to the weight of the aircraft, and the ground sensors 20a and 20b are activated.
is controlled so that it is properly grounded. Also,
When the left and right plowing depths change, the machine body 1 leans left and right, but at this time, the left or right ground sensor 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 sensors 20a and 20b are maintained at appropriate ground pressures. 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,
The ground sensors 20a and 20b extend outwards even if their front parts are small, and despite being located between the left and right running wheels 9a and 9b, the ground sensors 20a and 20b touch the ground over a wide area, so the sensing function is high and the vehicle is stable. Sensing is obtained and the aircraft 1 can be reliably propelled. Further, a single central leveling float 34 is provided between the left and right grounding sensors 20a, 20b which are linked to the switching valves 13a, 13b as a plurality of grounding sensors, and the rear side of this central leveling float 34 is connected to the traveling wheels 9a, 20b. 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 aircraft body is supported by the center leveling float 34 and the left and right leveling floats 32a and 32b, that is, the aircraft body is supported on the outer side of the center leveling float 34 and by the left and right leveling floats 32a and 32b. Since the left and right ground sensors 20a and 20b on the inner side detect the inclination of the machine body, the detection is accurate and stable, and the inclination correction control of the machine body can be performed appropriately, allowing for good rice planting work.

[Brief explanation of drawings]

[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 ground sensor 20b Right ground sensor
32a Left leveling float 32b Right leveling float

Claims (1)

[Claims] [Claim 1] A center leveling float 34 and left and right leveling floats 32a are installed at the center in the left-right direction of the aircraft and at both left and right sides.
32b, and is equipped with running wheels 9a and 9b that can move up and down with respect to the machine body, the left and right soil leveling floats 32a and 32 are arranged on the outer side of the central leveling float 34.
Left and right ground sensors 20a and 20b are provided on the inside of the outer side of b to detect the horizontal inclination of the machine body relative to the field scene, and the running wheels 9a and 9b are moved up and down by detecting the machine body inclination by the left and right ground sensors 20a and 20b. A rice transplanter characterized by being provided with a machine body tilt correction control device that corrects the tilt of the machine body by tilting the rice transplanter.