JPH09103140A - Rice transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rice transplanter designed to enable planting work so as to make left and right planting depths constant at any time irrespective of field conditions, and also enable planting depth control without changing the left and right inclinations of a float through also conducting a vertical motion of a longitudinal shaft when planting depth is to be changed by the operation of a planting depth control lever. SOLUTION: This rice transplanter is so designed that a paddy surface leveling float 21 to be set up between left and right traveling wheels 14, 14 is provided revolvably around a longitudinal shaft 21a and a rolling control is conducted by automatically actuating a hydraulic cylinder for rolling use on detecting the revolution of the float 21 around the longitudinal shaft 21a which is installed, via a planting depth control lever 22, on 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 seedling table and a planting claw.

[0002]

2. Description of the Related Art Conventionally, a rolling sensor for detecting a lateral inclination of a machine body, that is, a rolling sensor has been disclosed in, for example, Japanese Utility Model Publication No. 52-.
There is one that is separately installed on both left and right sides of a leveling float which is a main float as described in Japanese Patent No. 145127.

[0003]

However, in the above-mentioned means, since the sensor for detecting the ground pressure is small, the sensitivity is unacceptable, and the inclination of the actual body is detected because the rolling is detected based on the pressure difference of the ground pressure. There is a considerable difference between.

[0004]

[Means for Solving the Problem] A flattening float for flattening between the left and right running wheels is provided rotatably around the longitudinal axis.
The rotation of the float around the longitudinal axis was detected to automatically operate the rolling hydraulic cylinder to perform rolling control, and the longitudinal axis was attached to the machine via the planting depth adjustment lever. However, the actual tilt of the aircraft can be detected accurately and with good sensitivity in the entire float, and it is possible to perform planting work with a constant left and right planting depth regardless of field conditions. When changing the planting depth by operating the planting depth adjusting lever, the front-rear axis can also be moved up and down to adjust the planting depth without changing the horizontal inclination of the float, and it is easy for the rolling control to malfunction due to the planting depth adjustment. Can be prevented.

[0005]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is a partially enlarged side view, FIG. 2 is a side view of a walking rice transplanter, and FIG. 3 is a plan view of the same, wherein (1) is an engine, (2) is a transmission case, and (3) is the transmission case. (2) a planting case connected to a transmission case (4) via a transmission case (4); (5) a bonnet covering the upper side of the rice transplanting machine constituted by the engine (1) and the cases (2), (3) and (4); (6) is a spare seedling mounting table provided on the rear upper surface of the hood (5), (7) is a steering handle connected to the planting case (3), and (8) is above the handle (7). A low-back high seedling mounting table which is slidably mounted to the left and right through the guide rails (9) and (10).
1) is a transverse feed shaft mounted on the planting case (3) to drive the seedling mounting table (8) transversely, and (12) is mounted on the planting case (3) via a planting arm (13). Planting claw for taking out and planting one seedling of seedling from the seedling mounting stand (8), (1
4) A pair of left and right paddy traveling wheels supported on the mission case (2) via a swing case (15) so as to be movable up and down, and (16) are the swing cases (15) and (15).
A hydraulic cylinder for pitching which is connected to right and left rods (17) and (17) to control access to left and right running wheels (14) and (14), and (18) is a hydraulic cylinder for the engine (1) and the transmission case (2). Front and rear links on the lower side (19) (20)
The front float (21) is suspended between the left and right running wheels (14) and (14) below the planting case (3) and the handle (7). .

As shown in FIGS. 1 and 4 to 6, a link (23) in which a planting depth adjusting lever (22) is continuously provided and a rolling sensor arm which is a rolling sensor for detecting a lateral tilt of a rice transplanter body. (24) and (24) respectively support the rear side and the front side of the rear float (21). Further, a pitching sensor arm (25), which is a pitching sensor for detecting tilting of the rice transplanting machine in the front-back direction.
Is brought into contact with the upper surface of the front float (18), and a change in the planting depth and a pitching operation of the body are detected by a change in the distance between the front float (18) and the body.

A receiving shaft (28) is mounted above the transmission case (4) via a bracket (26) and a rolling fulcrum shaft (27) so that the receiving pipe (28) is rotatably inserted into the rolling shaft. (29) Input link (3
0) (30) The base end is fixed, and the link (30) (30)
While the upper end of the rolling sensor arm (24) (24) is connected to the tip, a rolling arm (31) is erected on a vertical line connecting the fulcrum shaft (27) in the middle of the receiving cylinder (28). 31) When one end is connected to a rolling rod (32) and the other end is connected to a spool (33a) of a rolling hydraulic switching valve (33), and the left and right sensor arms (24) and (24) move up and down in substantially the same direction. The left and right input links (30) and (30) are oscillated about the rolling shaft (29) to maintain the hydraulic switching valve (33) neutral,
When the left and right sensor arms (24) and (24) move in different directions or when only one of the sensor arms (24) moves up and down, the rolling fulcrum shaft (27) is moved by the swing amount difference between the left and right links (30) and (30). Swing the receiving cylinder (28) to the center to move the spool (33a) forward and backward, and switch the switching valve (33).
Is switched.

Further, a receiving cylinder (35) is fixedly mounted on a vehicle body frame (34) on which the engine (1) is mounted, and the pitching sensor arm (2) is swingably attached to the receiving cylinder (35).
The base end of 5) is inserted and supported, and the other end of the arm (25) is connected to a spool switching arm (39) of a pitching hydraulic switching valve (38) via a swing link (36) and a pitching link (37). The body and front float (1) that are connected to change the planting depth of the planting claw (12) due to unevenness of the tillage etc.
8) when the distance between the sensor arms changes (25)
Thus, this is detected and the switching valve (38) is switched.

The hydraulic pressure switching valves (33) (38)
The hydraulic cylinder for rolling (40) and the hydraulic cylinder for pitching (16) are operated and controlled by a piston rod (16a) of the hydraulic cylinder for pitching (16) attached to the body frame (34). 41) through the swing plate (42)
And both ends of the plate (42) are connected to the swing case (15) via left and right rods (17) and (17).
(15) and a piston rod (16a)
The hydraulic cylinder for rolling (40) and the piston rod (40) are interposed between a fixed mounting plate (43) mounted on the side and the swing plate (42) via a swing fulcrum shaft (44).
a), the swing plate (42) is slid in the front-rear direction under the control of the hydraulic cylinder (16) for pitching, so that the height of the right and left wheels (14) and (14) with respect to the machine body is made different at the same time. While the application depth is maintained substantially constant, the swing plate (42) is horizontally swung about the fulcrum shaft (41) by the control of the rolling hydraulic cylinder (40) so that the right and left rods (17) and (17) are different. By pushing and pulling in the direction, the support height of the left and right wheels (14) and (14) is made different to maintain the rice transplanting machine substantially horizontally in the left and right directions.

As is clear from the above, the left and right running wheels (1
4) A flattening float (21) provided between (14) is rotatably provided around the longitudinal axis (21a), and the rotation of the float (21) around the longitudinal axis (21a) is detected for rolling. A hydraulic cylinder (40) is automatically operated to perform rolling control, and a longitudinal axis (21) is attached to the body via a planting depth adjusting lever (22).
a) is attached, and the float (21) is moved up and down via the longitudinal shaft (21a) by operating the lever (22) to adjust the planting depth.

The pitching sensor arm (2
5) The lower pressure sensing part (25a) is in contact with the buoyancy center position (A) of the front float (18), and the vertical movement of the front float (18) is accurately detected by the sensor arm (25). The sensitivity is improved.

This embodiment is configured as described above, and the depth of the planting paddy plane changes due to unevenness of the tiller during the rice planting work, so that the front float (18) is approximately parallel to the planting paddy plane. ) The whole goes up and down and comes in and out of contact with the aircraft,
Sensor arm (25) interlocked with front float (18)
The operation of the pitching hydraulic cylinder (16) is controlled by the rocking motion of the pitching hydraulic cylinder (16), the traveling wheel (14) is moved in and out, and the aircraft is raised and lowered.
The planting depth is kept substantially constant, and the rolling hydraulic cylinder (40) is operated and controlled by swinging the rear float (21) left and right and up and down with respect to the aircraft when the aircraft is tilted left and right on a ridge or a slope. Left and right wheels (14)
(14) The rice transplanting machine is raised and lowered to a state in which the supporting heights are made different to keep the rice transplanting machine substantially horizontal, and the planting depth on the left and right sides is kept substantially constant.

The front and rear floats (18) (2)
1), the adjusting lever (2)
2) Even if the planting depth is changed, the effect on the pitching is small and the pitching performance can be stably maintained.

[0014]

As is apparent from the above embodiments, according to the present invention, the field leveling float (21) provided between the left and right running wheels (14) (14) is provided rotatably around the longitudinal axis (21a). , Float about the longitudinal axis (21a) (2
1) Rotation is detected to detect the rolling hydraulic cylinder (4
0) is automatically operated to perform rolling control, and the longitudinal shaft (21a) is attached to the body via the planting depth adjusting lever (22). Accurate and sensitive detection of the actual machine tilt is possible as a whole, and planting work can be performed with the left and right planting depths always kept constant regardless of the field conditions. When the vegetation depth is changed by operating the adjusting lever (22), the longitudinal axis (21a) is also moved up and down, and the vegetation depth can be adjusted without changing the horizontal inclination of the float (21). Can be easily prevented from malfunctioning.

[Brief description of the drawings]

FIG. 1 is a partially enlarged side view.

FIG. 2 is an overall side view of the rice transplanter.

FIG. 3 is a plan view of the same.

FIG. 4 is a partially enlarged plan view.

FIG. 5 is an explanatory diagram of a pitching sensor unit.

FIG. 6 is an explanatory diagram of a rolling sensor unit.

[Explanation of symbols]

 (14) Running wheel (21) Float (21a) Front-rear axis (22) Planting depth adjustment lever (40) Rolling hydraulic cylinder

 ──────────────────────────────────────────────────の Continuing from the front page (72) Inventor Hiroyuki Takahashi 1-32 Chayacho, Kita-ku, Osaka Yanmar Agricultural Machinery Co., Ltd.

Claims (1)

[Claims] 1. A float for leveling a field provided between the left and right running wheels is provided rotatably around an axis in the front-rear direction, and rotation of the float around the axis in the front-rear direction is detected to automatically operate a rolling hydraulic cylinder. A rice transplanter characterized by being configured to perform rolling control and having a longitudinal axis attached to the machine via a planting depth adjusting lever.