JPH0324008Y2 - - Google Patents

Description

[Detailed description of the invention] "Field of industrial application" This invention is a horizontal control device for a rice transplanter equipped with a rolling cylinder that maintains the machine horizontally by varying the support heights of the left and right wheels relative to the machine body. Regarding.

``Prior Art'' Conventionally, when approaching a ridge, it was necessary to hold and operate the ridge lever, then hold the handle and tilt the machine until the ridge lock pin engaged with the pin hole.

``Problem that the invention seeks to solve'' Therefore, with the above means, a considerable amount of force is required to tilt the aircraft to a predetermined position, and women and women, who have weak strength, can easily perform this operation. Moreover, the aircraft's inclination was limited to three levels: right, left, and horizontal, making it impossible to accurately adjust to the edge.

``Means for Solving the Problems'' Therefore, the present invention interlocks and connects the rolling switching valve that controls the operation of the rolling cylinder with a rolling hand control lever installed in the steering handle, and It is configured to enable horizontal control of the aircraft.

``Function'' According to the present invention, processing at the ridge can be done with a simple lever operation from the working position, and the inclination of the machine can be adjusted steplessly to match the ridge, making it accurate. This makes it possible to plant along the ridges, improving work efficiency.

"Embodiments" Examples of the present invention will be described below in detail based on the drawings. Fig. 1 is an explanatory diagram of the rolling control section, Fig. 2 is a side view of the walking rice transplanter, and Fig. 3 is a plan view of the same. In the figure, 1 is the engine, 2 is the transmission case,
3 is a planting case connected to the transmission case 4 via the transmission case 4; 5 is a bonnet that covers the upper side of the rice transplanting machine constituted by the engine 1 and the cases 2, 3, and 4; and 6 is the bonnet. 5 is a preliminary seedling stand provided on the rear upper surface; 7 is a steering handle connected to the planting case 3; 8 is attached to the upper side of the handle 7 via guide rails 9 and 10 so as to be slidable back and forth to the left and right. Seedling stand with low front and high back, 11
12 is a transverse feed shaft that is attached to the planting case 3 and drives the seedling tray 8 in a transverse manner; 12 is attached to the planting case 3 via the planting arm 13 to transfer one seedling from the seedling tray 8; A pair of left and right paddy wheels 14 are supported on the transmission case 2 via the swing case 15 so as to be able to rise and fall freely, and 16 are attached to the swing cases 15 and 15 via the left and right swing rods 17, 17. A vertical hydraulic cylinder 18 is a pitching cylinder that connects and controls the left and right paddy wheels 14, 14 to move in and out simultaneously to raise and lower the rice transplanting machine; 18 is the engine 1 and each case 2;
3, 4 a leveling float for leveling the planting field supported via a front link 19 and a planting depth lever 20 on the lower side; A pitting sensor 22 for detecting the elevation of the front part of the float 18 is arranged behind the paddy wheels 14 on both sides of the rear of the float 18 to detect the inclination of the rice transplanting machine in the left and right direction and to level the ground in ruts (erasing wheel marks).
This is a flat sled plate type rolling sensor that performs

As shown in FIGS. 4 and 5, the engine 1 is connected to the transmission case 2 via the vehicle body frame 23.
The vertical hydraulic cylinder 16 is attached to the vehicle body frame 23, and the intermediate pitching adjustment cylinder shaft 25 is connected and fixed to the tip of the piston rod 24 of the cylinder 16. The middle of the rolling adjustment shaft 26 is rotatably inserted into the cylindrical shaft 25, and arms are attached to both ends of the shaft 26 so that the pushing and pulling directions of the left and right swing rods 17, 17 are reversed by the rotation of the rolling adjustment shaft 26. 27,
The tips of the swing rods 17 and 17 are connected to each other through the cylinder shaft 27, and a horizontal hydraulic cylinder 28 is provided, which is a rolling cylinder that corrects the left and right inclination of the rice transplanting machine body and keeps it approximately horizontal. It is attached via a bracket 29, and the piston rod 30 of the cylinder 28 is connected to the rolling adjustment shaft 26 via an arm 31. The shafts 25 and 26 are slidably displaced in the longitudinal direction of the machine by controlling the vertical hydraulic cylinder 16. The rice transplanting machine is raised and lowered by pushing and pulling the left and right swing rods 17, 17 in the same direction, and the seedling planting depth is kept approximately constant. 17, 17 in different directions to move the left and right wheels 1.
The support heights of the rice transplanters 4 and 14 are made different, and the rice transplanting machine is supported substantially horizontally.

Furthermore, it is provided with a hydraulic unit case 34 for driving and controlling the vertical hydraulic cylinder 16, and the unit case 34 is fixed to one side of the transmission case 2, and a connecting rod 35 and a link that contract by a pressing force exceeding a set value are provided. The pitching sensor 21 is connected to the unit case 34 via 36 and 37.
The pitching sensor 21 detects the vertical movement of the front part of the leveling float 18 and automatically operates the vertical hydraulic cylinder 16, while the swing hand control lever is provided on the steering handle 7. The pitching sensor 21 is connected to the lift lever 38 via an arm 39, and the vertical hydraulic cylinder 1 is activated by manual operation of the lift lever 38.
6 is configured to operate.

Next, a rolling sensor arm 41 is provided for setting the lowest descending position by a descending regulation stopper 40,
The rear end left and right rolling sensors 22, 22 are connected and fixed to the left and right rolling sensor arms 41, 41, respectively, and the front ends of the left and right rolling sensor arms 41, 41 are attached to a bearing body 42 provided on the upper rear part of the transmission case 4. Each is independently rotatably supported. Further, a rolling hydraulic pressure switching valve 43 for controlling the operation of the horizontal hydraulic cylinder 28 is provided. An input link 48 is provided at both ends of a core shaft 47 that supports the intermediate portion of the receiver tube 46 via a fulcrum shaft 45, horizontally supports the receiver tube 46 in the left-right direction of the machine so as to be swingable, and is rotatably inserted into the receiver tube 46. ，
48, the base end of which is fixed, and a link 49 that is integrally connected to the rolling sensor arm 41 and the input link 48 are connected by a rod 50, and each member 2
2, 41, 46, 47, 48, 49 as the fulcrum shaft 45
A grounding holding spring 51 is stretched between the arm 49 and the planting case 3, and the left and right rolling sensors 22, 22 are connected by the springs 51, 51 provided symmetrically. When the left and right rolling sensors 22 move up and down in the same direction at the same time, the left and right input links 48, 48 swing around the core shaft 47, and the rolling hydraulic pressure switching valve 43 is brought into neutral position. While holding, when the left and right rolling sensors 22, 22 move in different directions or only one of them moves up and down, the receiving cylinder 46 swings around the rolling fulcrum shaft 45 due to the difference in the amount of swing between the left and right links 49, 49. , the horizontal hydraulic cylinder 28 is driven and controlled by operating the rolling hydraulic pressure switching valve 43.

As shown in FIGS. 6 and 7, the rolling hydraulic pressure switching valve 43 is connected to an engaging portion 52 at the tip of the spool 52.
a has a long hole 53, and the fulcrum shaft 45 of the receiving tube 46
An engaging arm 54 is fixedly installed on one side of the center, and the arm 54 is engaged and connected to the elongated hole 53, and the arm 54 is moved by vertical swinging of the receiving tube 46 about the fulcrum shaft 45. The switching operation of the switching valve 43 is performed by moving the spool 52 forward and backward through the spool 52. By directly connecting the spool 52 to the receiving tube 46 that transmits the detection operation of the sensor 22, the connection system between the receiving tube 46 and the spool 52 is controlled. It is configured to eliminate backlash and improve the sensitivity of the sensor 22 and the accuracy of this rolling control.

On the other hand, a rolling arm 55 is erected on a vertical line connecting the fulcrum shaft 45 of the receiving tube 46,
A rod 58 and a swinging L are attached to the rolling hand control lever 57 provided on the panel plate 56 of the steering handle 7.
The rolling arm 55 is interlocked and connected via a shaped ring 59, six rods, and a handle arm 61, and when the operation lever 57 is tilted left and right, the receiver 46 is forced to swing up and down about the fulcrum shaft 45. and move the spool 52 forward and backward as appropriate.
The structure is such that the support height of each of the left and right wheels is varied so that the aircraft can be tilted steplessly. In addition, 62 in the figure is a link fulcrum shaft that swingably supports the L-shaped link 59 toward the body, 63 in FIG. 3 is a planting clutch lever, and 64 is a main clutch lever.

The present invention is constructed as described above, and the seedling stand 8
The rice transplanter is moved back and forth from side to side, and one seedling is taken out one by one using the planting claw 12 from the seedling platform 8 and planted.The vertical hydraulic cylinder 16 is actuated by operating the lifting lever 38, and the rice transplanting machine is raised and lowered. At the same time, the front part of the leveling float 18 moves up and down due to changes in the unevenness of the tiller, the pitching sensor 21 moves up and down, the vertical hydraulic cylinder 16 operates, and the rice planting The machine body moves up and down to keep the ground pressure of the leveling float 18 substantially constant, and to keep the seedling planting depth of the planting claws 12 substantially constant. In addition, when the rice transplanting machine tilts to the left or right due to changes in the unevenness of the tiller, the left and right rolling sensors 22, 22 move in different directions, or only one of them moves up and down, and the horizontal hydraulic cylinder 28 operates to transplant rice. The rice transplanting machine is tilted left and right to keep it approximately horizontal with respect to the planting field.

During such work, when the hand control lever 57 is tilted to the right or left from the neutral position, the receiving tube 46 swings up and down clockwise or counterclockwise about the fulcrum shaft 45 and moves in or out of the spool 52. condition, the switching valve 43 is switched, and the support height of the right wheel 14 is controlled to be small or large, and the support height of the left wheel 14 is controlled to be large or small, so that the aircraft is forcibly tilted to the left or right. Even under conditions where the machine body cannot be kept completely horizontal by the control by the sensor 22 alone, such as on a slope of a plowing platform such as along a ridge, the sensor 2 can be adjusted by operating the lever 57.
Regardless of 2, the machine is forcibly tilted and held horizontally, allowing planting work to be done at the same planting depth on both sides. Therefore, it is not necessary to install an existing ridge lever as in the past, and the processing work at the ridge becomes easy. As shown in the imaginary line in FIG. 1, a configuration may also be adopted in which the rolling hydraulic switching valve 43a is provided at the L-shaped link 59 position and the rotating spool of the switching valve 43a is appropriately switched by rotation of the center of the link 59.

The one in FIG. 8 is one in which the receiver 46 is interlocked and connected to the rolling hydraulic switching valve 43b via a valve link 65, and one side of the valve link 65 is rotatably attached to a fixed support shaft 66 on the fuselage side. The spool 52b of the switching valve 43b is attached to the swing arm 65a.
At the same time, the engagement arm 65b on the other side of the valve link 65 is engaged and connected to the receiving tube 46 through the elongated hole 67 and the engaging arm 54a, and the receiving tube 46 is rotated around the fulcrum shaft 45 as described above. The spool 52b is moved back and forth appropriately through the valve link 65 to switch the switching valve 43b when the spool 52b is swung up and down in the counterclockwise direction, and the same effect as in the above-mentioned embodiment is achieved.

"Effects of the Invention" As is clear from the above embodiments, the present invention has a structure equipped with a rolling cylinder 28 that maintains the aircraft horizontally by making the supporting heights of the left and right wheels 14, 14 with respect to the aircraft body different from each other. The rolling switching valves 43, 43a, 43b that control the operation of the rolling cylinder 28 are interlocked with a rolling hand control lever 57 installed on the steering handle 7, so that the steering handle 7 can horizontally control the aircraft. Therefore, processing at the ridge can be performed with a simple operation using the lever 57 from the working position, and the inclination of the machine can be adjusted steplessly to match the ridge, allowing accurate processing at the ridge. It has remarkable effects, such as making it possible to plant the left and right plants at the same depth.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the rolling control section, 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 a side view of the same, Fig. 6 7 to 7 are explanatory diagrams of the rolling switching valve section, and FIG. 8 is an explanatory diagram showing another modified structural example. 7... Steering handle, 14... Wheels, 28...
Rolling cylinder (horizontal hydraulic cylinder),
43, 43a, 43b...Rolling switching valve, 5
7...Rolling hand control lever.

Claims (1)

[Scope of utility model registration request] In a structure equipped with a rolling cylinder that maintains the aircraft horizontally by varying the support heights of the left and right wheels relative to the aircraft body, a rolling switching valve that controls the operation of the rolling cylinder is installed in the steering handle part. A horizontal control device for a rice transplanter, characterized in that rolling hand control levers are interlocked and connected to enable horizontal control of the machine body using a steering handle.