JPH0233622Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a walking rice transplanter in which a rice transplanter body swingably supports rice paddy wheels via an axle case.

``Prior art'' Conventionally, as shown in Japanese Utility Model Publication No. 55-55533, a sensor that can be raised and lowered to ground is attached to a float.
Technology has been developed to use sensors to stabilize the posture of rice transplanters.

"Problems to be Solved by the Invention" In the above-mentioned conventional technology, when the float moves up and down, the sensor also moves up and down, so the sensor also moves up and down due to the up and down movement of the float, making it impossible to accurately detect inclination. There were structural and functional problems.

``Means for Solving the Problems'' However, the present invention provides a pair of left and right sensors that can be raised and lowered to the ground, and the sensors are disposed forward of the axis of the paddy wheel, and the sensors are supported by the rice transplanting machine body. and the sensor is provided at a position in front of the paddy wheel on a longitudinal line of the machine body passing through the paddy wheel.

"Function" Therefore, since the sensor is disposed in front of the axis of the paddy wheel, it can be detected in front of the wheel and control delays can be easily prevented, and since the sensor is supported from the rice transplanting machine body, It is possible to eliminate problems such as the sensor moving up and down due to the up and down movement of the float as in the past, and the sensor can accurately detect inclination, and compared to the past, the detection structure such as the sensor has been simplified and the detection function has been improved. This can be easily achieved, and since the sensor is installed in front of the paddy wheel, it is possible to detect the depth of the plow (horizontal inclination) at the planned position of the paddy wheel, and it is possible to perform inclination control more accurately than before. In order to improve the accuracy of slope detection, it is desirable to support a pair of sensors over a wide span, but this can cause problems such as contact with adjacent rows, and it is difficult to support a pair of sensors over a wide span even if the plowing depth at the paddy field wheel position remains unchanged. However, problems such as malfunctions occur due to the presence of clods only at the sensor position, but these problems can be resolved and the sensor can perform detection operations safely and accurately.

"Embodiment" An embodiment of the present invention will be described below in detail based on the drawings.

Figure 1 is an overall plan view of the rice transplanter showing the main parts, Figure 2
The figure is the same side view, and in the figure, 1 is the engine, 2 is the transmission case, 3 is the planting transmission case, 4 is the planting drive case, and 5 is the swing case 6 which is the axle case on both sides of the transmission case 2. Paddy wheels 7, 7 supporting the body consisting of the engine 1 and each case 2, 3, 4 via a planting depth adjustment link 8 and a buffer member 9 are disposed behind the wheels 5. a pair of left and right side floats, 10 a steering handle connected to the rear end of the drive case 4;
Reference numeral 11 denotes a seedling stand with a low front and rear height that is installed along the drive case 4 and the upper part of the handle 10 via guide members 12 and 13 and is reciprocated from side to side. A planting claw that takes out one seedling from the attached seedling platform 11 and plants it; 16 is a protector that protects the hydraulic cylinder 17 for raising and lowering the wheels; 18, 18 is supported by the protector 16 via a sensor arm 19 so that it can be raised and lowered freely; It is a pair of left and right float-shaped wheel position sensors, and is configured to take out one seedling at a time using a planting claw 14 from a seedling platform 11 that moves back and forth when the aircraft is running, and sequentially plant them in the field. .

As shown in FIG. 3, the sensors 18, 18 are supported by a cylindrical shaft 21 that is supported on a fulcrum shaft 20 at the center of the fuselage so as to be swingable from side to side. 18 is provided, and the sensors 18, 18 are disposed in front of the 5-axis center of the rice paddy wheels, and the sensors 18 are supported from the rice transplanting machine body, and the sensors 18 are placed on the front-rear direction line of the machine passing through the rice paddy wheels 5 and in front of the paddy wheels 5. The sensor 18 is provided at the position.

The center of a sensor arm shaft 22, which has the base end of each sensor arm 19 integrally fixed to both ends, is rotatably supported by the cylindrical shaft 21.
2 is connected to the hydraulic switching valve 23 for raising and lowering both wheels via a link switching mechanism 24, and the cylinder shaft 21 is interlocked and connected to the hydraulic switching valve 25 for lifting and lowering one wheel via a link switching mechanism 26. sensor 18,
18 goes up and down and the sensor arm shaft 22 rotates, the switching valve 23 is appropriately switched to adjust the vertical movement of both wheels 5, 5 relative to the aircraft body, and one of the sensors 18 goes up and down and the sensor arm shaft 22 rotates. When the cylinder shaft 21 swings about the cylinder shaft 20, the switching valve 25 is operated to change the support heights of the left and right wheels 5, 5, so that the machine body is supported substantially horizontally.

By the way, the float width W at the front and rear ends of the side floats 7, 7 is formed to be approximately the same width as the wheel width D of the wheel 5 (W≒D), and the float 7 in the middle
A notch 27 is provided on the inside so that the middle of the float 7 is placed along the outside of the wheel 5. Then, at the forward position of the front end of the wheel 5, the front end of the float 7 is integrated with the fuselage side via the buffer member 9 and the connection support member 28, and at the rear end position of the wheel 5, the rear end of the float 7 is integrated with the aircraft body via the adjustment link 8. It is connected and supported like this. Furthermore, the sensors 18, 18 are arranged in front of the left and right side floats 7, 7, and the sensor width T of these sensors 18, 18 is set to be approximately the same width as the float width W (that is, D≒W≒T). is forming.

The present embodiment is constructed as described above, and the sensor floats 7, 7 are installed at the front and rear of the wheels 5, 5 so as to be substantially equal to the wheel width D.
Rolling of the aircraft can be effectively prevented without the inconvenience of extending the overall width of the aircraft by protruding the wheels 5 to the outside.
Furthermore, the ground contact area can be expanded, making it ideal for work in wet fields or deep fields.

FIG. 4 shows another example of a modified structure, in which the front end width dimension a of the float 7 is formed to be smaller than the rear end width dimension A (a<A), and from the middle of the float 7 to the front end. The hook is provided along the outside of the wheel 5.

"Effects of the Invention" As is clear from the above embodiments, the present invention provides a pair of left and right sensors 18, 18 which can be raised and lowered to touch the ground, and the sensors 18 are disposed forward of the 5 axes of the paddy wheel. The sensor 18 is supported by the rice transplanting machine body, and the sensor 18 is provided at a position in front of the paddy wheel 5 on the front-rear direction line of the machine passing through the rice paddy wheel 5. Since the sensor 18 is arranged in front of the wheels 5, it is possible to easily prevent control delays, and since the sensor 18 is supported from the rice transplanter body, it is possible to prevent the sensor from moving up and down due to the up and down movement of the float, as in the conventional case. The problem can be eliminated, the inclination can be detected accurately by the sensor 18, and the detection structure such as the sensor 18 can be simplified and the detection function can be improved compared to the conventional method. Sensor 1 in the front position of 5
8, it is possible to detect the plowing depth (left and right inclination) at the planned travel position of the paddy wheel 5, and it is possible to perform inclination control more accurately than before. sensor 18,1
It is desirable to support the paddy wheel 8 with a wide span, but there are problems such as contact with adjacent rows, and even though the plowing depth at the paddy wheel 5 position has not changed, there is a soil clod only at the sensor 18 position. Although problems such as malfunctions occur due to the presence of the above, these problems can be resolved and the sensor 18 can perform the detection operation safely and accurately, which is a practical effect.

[Brief explanation of the drawing]

FIG. 1 is an overall plan view of the rice transplanter, FIG. 2 is a side view thereof, FIG. 3 is an explanatory diagram of a sensor section, and FIG. 4 is an explanatory diagram showing another example of a modified structure. 5...Paddy wheel, 18...Sensor.

Claims (1)

[Scope of utility model registration request] A pair of left and right sensors are provided that can be raised and lowered to touch the ground, and the sensors are disposed forward of the axis of the paddy wheel, and the sensor is supported by the rice transplanter body, and the sensor is placed on the front-rear direction line of the machine passing through the paddy wheel. A walking rice transplanter characterized in that the sensor is provided at a front position.