JPH0324004Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a rice transplanter equipped with a vertical hydraulic cylinder for raising and lowering the entire rice transplanting machine body, and a horizontal hydraulic cylinder for tilting the rice transplanting machine from side to side.

"Prior Art" Conventionally, as shown in Japanese Patent Application Laid-Open No. 52-131823, there has been a technology that detects the left and right inclination of a rice transplanting machine using a pair of left and right rolling sensors, and supports the rice transplanting machine horizontally with respect to the planting rice surface.

``Problems to be solved by the invention'' The above-mentioned conventional technology lifts the rice transplanter body when changing direction at the edge of a ridge or running on the road, and the rolling sensor is activated by centrifugal force during turning and obstacles. There was a problem where the rice transplanter would tilt due to activation.

``Means for Solving the Problems'' However, the present invention provides a rolling lock mechanism for the rolling hydraulic switching valve of the horizontal hydraulic cylinder, and maintains the hydraulic switching valve in the neutral position when the locking mechanism locks the rolling hydraulic pressure. It is composed of

"Operation" Therefore, according to the present invention, the rolling sensor is damaged by centrifugal force or collision with an obstacle when lifting the rolling sensor from the field or road surface and changing direction as the rice transplanting machine rises, for example at the edge of a ridge. Even when outputting a control signal to operate the horizontal hydraulic cylinder, the rolling lock mechanism locks the rolling hydraulic switching valve that operates the horizontal hydraulic cylinder in the neutral position. This prevents malfunctions of the rice transplanter, allowing the rice transplanter to safely operate on the road or when changing direction at the edge of a ridge during rice planting without tilting to the left or right, allowing for stable operation and easier handling than before. It is something that can be achieved.

"Embodiments" Examples of the present invention will be described below in detail based on the drawings. Figure 1 is an explanatory diagram of the main parts, Figure 2 is a side view of the walking rice transplanter, and Figure 3 is a plan view of the same. In the figure, 1 is the engine, 2 is the transmission case, and 3 is the transmission case. 2 is a planting case connected via a transmission case 4; 5 is a bonnet that covers the upper side of the rice transplanting machine constituted by the engine 1 and each of the cases 2, 3, and 4; 6 is provided on the rear upper surface of the bonnet 5; A spare seedling stand, 7 is a steering handle connected to the planting case 3, 8 is a seedling with a low front and rear height attached to the upper side of the handle 7 so as to be able to slide back and forth from side to side via guide rails 9 and 10. A mounting stand, 11 is a transverse feed shaft that is attached to the planting case 3 and drives the seedling mounting stand 8, and 12 is a planting arm 1 attached to the planting case 3.
3, a pair of left and right paddy wheels are attached to the seedling table 8 to take out and plant one seedling from the seedling platform 8; 16, left and right swing rods 17 are attached to the swing cases 15, 15;
Left and right paddy wheels 14, 14 are connected via 17.
A hydraulic cylinder 18 is a hydraulic cylinder for raising and lowering the rice transplanting machine by simultaneously controlling the entry and exit of the rice transplanter. 21 is a pitching sensor that detects the elevation of the front part of the float 18 due to changes in the planting depth of seedlings in the planting claw 12; 22 is a pitching sensor for the float 1;
This is a rolling sensor in the form of a flat sled plate, which is disposed behind the paddy wheels 14 on both sides of the rear of the rice transplanter 8 to detect the inclination of the rice transplanter in the left-right direction and level the ruts (erasing wheel marks).

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,
A horizontal hydraulic cylinder 28 is provided which connects the tips of the swing rods 17 and 17 via a cylinder 27, and also corrects the horizontal inclination of the rice transplanting machine body to keep it approximately horizontal.
The piston rod 30 of the cylinder 28 is connected to the rolling adjustment shaft 26 via the arm 31, and the vertical hydraulic cylinder 1
6 control, the respective shafts 25 and 26 are slidably displaced in the longitudinal direction of the aircraft, and the left and right swing rods 17 and 17 are
The rice transplanting machine is raised and lowered by pushing and pulling in the same direction to keep the seedling planting depth approximately constant, while the horizontal hydraulic cylinder 28 is controlled to rotate the rolling adjustment shaft 26 to move the left and right swing rods 17, 17 in different directions. The support heights of the left and right wheels 14, 14 are made different by pushing and pulling, and the rice transplanting machine body is configured to be 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 arm 39 is connected to the vertical lever 38 provided on the steering handle 7. The pitching sensor 21 is connected to the pitching sensor 21 via the vertical lever 38, and the vertical hydraulic cylinder 16 is operated by manual operation of the lifting lever 38.

Next, as shown in FIG.
A rolling sensor arm 41 is provided for setting the lowest descending position, and rolling sensors 22, 22 on the left and right rear ends are connected and fixed to the left and right rolling sensor arms 41, 41, respectively, and are provided on the rear upper side of the transmission case 4. The front ends of the left and right rolling sensor arms 41, 41 are independently rotatably supported by a bearing body 42. 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 which supports the intermediate portion of the receiver tube 48 via a support shaft 45, allows the receiver tube 46 to swing horizontally in the left-right direction of the machine, and is rotatably inserted into the receiver tube 46. , 48, the base end of which is fixed, and the link 4 is integrally connected to the rolling sensor arm 41.
9 and the input link 48 are connected by a rod 50, and each member 22, 41, 46, 47, 48,
49 are formed bilaterally symmetrically around the fulcrum shaft 45, and a grounding holding spring 51 is stretched between the arm 49 and the planting case 3, and the left and right springs 51, 51 are provided symmetrically. Rolling sensor 2
2 and 22 are pressed against the planted field surface, respectively,
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 to maintain the rolling hydraulic pressure switching valve 43 neutrally, while the left and right rolling sensors 22, When the left and right links 49, 4 move up and down in different directions or only one of them moves up and down,
9, the receiving cylinder 46 is swung around the rolling fulcrum shaft 45, and the rolling hydraulic pressure switching valve 43 is actuated to drive and control the horizontal hydraulic cylinder 28.

Further, the descending regulation stopper 40 is formed in a U-shape, and a seedling take-out plate 52 supports the guide rail 9.
The stopper 40 is attached to the lower surface via a bracket 53.
The rolling sensor arm 41 is inserted into the stopper 40 so as to be vertically movable, and the lowering of the rolling sensor arm 41 is regulated by the stopper 40. They are each supported by a bearing body 42 at the rear side of the planting case 3 so as to be able to move up and down independently, and the bearing body 42 is fixed to the upper side of the transmission case 4 via a bracket 54. A bearing body 42 is provided on the front side, and a sensor arm 41 is extended approximately parallel to the transmission case 4.
The spring 5 is positioned at approximately the same height as the lower surface.
1, the sensor arm 41 is held downward by a stopper 40, and the stopper 40 prevents the sensor arm 41 from swinging horizontally, thereby restricting the horizontal movement of the rolling sensor 22.

As shown in FIGS. 1 and 6, the lower end of the spool arm 55 of the low-long hydraulic switching valve 43 and the middle of the receiver tube 46 are connected by a rod 56, and the receiver tube 46 swings about the rolling fulcrum shaft 45. The spool 57 of the switching valve 43 is rotated by the swinging of the spool arm 55 which interlocks the movement via the rod 56.
while rotating the switching valve 43 to operate the switching valve 43.
A rolling lock mechanism 58 is provided on the switching valve 43 and configured to stop the switching valve 43 from operating.

The rolling lock mechanism 58 has a fan-shaped notch 5.
9 and a rolling lock lever 61 that operates the lock 60 up and down.
The lower end of a rolling rod 63 inserted into the fixed cylinder 62 so as to be movable up and down is connected and fixed to the lock plate 60, and the fixed pin 64 at the upper end of the rolling rod 63 is engaged with the sliding groove 65 at the tip of the lever 61. When the lock plate 60 and the lock lever 61 are interlocked and the rice transplanting machine is horizontally controlled, the sturdy circular arc surface 59a of the notch 59 is connected to the switching valve 4.
The locking plate 60 is suspended and supported so as to be located above a locking pin 66 fixed to the upper end of the spool arm 55 of No. 3, and the locking pin 66 is swung together with the spool arm 55 on the inner side of the circular arc surface 59a. The lever 61 is pivoted about the fulcrum shaft 68 against the return spring 67 when it is inconvenient for the rice transplanter to tilt due to horizontal control. The locking plate 60 is pulled out, and the locking pin 66 is engaged with the locking groove 59b at the lower part of the notch 59 through the sliding surfaces 59c, 59c on both sides of the notch 59, and the spool arm 55 is forced into the vertical position. The switching valve 43 is held at the neutral position by preventing the spool 57 from rotating.

Further, a lever support plate 61a is provided for locking the lever 61 in multiple stages, and by adjusting the amount of operation of the lever 61, the lifting amount of the lock plate 60 can be freely adjusted and held in position. The swing range of the locking pin 66 within the fan-shaped notch 59 is restricted.

A planting clutch lever 70 shown in FIG. 2 is connected to the lock lever 61 via a wire 69, and when the planting clutch of the lever 70 is operated, the switching valve 43 is moved to the neutral position via the rolling lock mechanism 58. While holding the lever 7
Even when the planting clutch is engaged at 0, the rolling lock mechanism is released and the switching valve 43 is operated.

As shown in FIG. 7, the transmission case 2 is connected to the vertical hydraulic cylinder 16 and the horizontal hydraulic cylinder 26.
A hydraulic pump 71 that pumps the hydraulic oil inside, and two throttle valves 7 supply the hydraulic pressure from the hydraulic pump 71 necessary for the vertical and horizontal hydraulic cylinders 16 and 28, respectively.
Flow divider 7 supplying divided flow via 2, 73
4, a pitting hydraulic pressure switching valve 75 that controls the operation of the vertical hydraulic cylinder 16, and a rolling and pitching hydraulic switching valve 43, 75, which is connected between the flow divider 74 and the flow by increasing the circuit hydraulic pressure above the setting. Relief valves 76 and 77 for pitching and rolling, which short-circuit the discharge side of the divider 74 into the mission case 2, are provided inside the hydraulic unit case 34, respectively, and the throttle valves 72 and 73 of the flow divider 74 are arranged inside the hydraulic unit case 34. The optimum amount of high-pressure oil is set by each switching valve 7.
5, 43 to each cylinder 16, 28, the pitching sensor 21 and the lift lever 38 actuate the pitching hydraulic pressure switching valve 75, and the vertical hydraulic cylinder 16 is actuated and controlled, and the rolling sensor 22, 22 controls the rolling hydraulic pressure. While operating the hydraulic pressure switching valve 43 to control the operation of the horizontal hydraulic cylinder 28, the rolling hydraulic pressure switching valve 43
Pilot check valves 78 and 79 capable of reliably sealing against high pressure are incorporated between the horizontal hydraulic cylinders 28, and when the rolling hydraulic switching valve 43 is held at the neutral position by the rolling lock mechanism 58, the neutral It is constructed to prevent oil leakage at certain positions and ensure reliable locking.

As shown in FIGS. 8 and 9, hydraulic hoses 80 and 81 for rolling control are inserted between a drive belt 82 that transmits output from the engine 1 to the mission 2 and a belt cover 83 that covers the belt 82. The hoses 80, 81 are arranged so as to be protected from muddy water and obstacles.

As shown in FIG. 6, the left and right links 49,
49 from above to lift and support the left and right rolling sensors 22, 22 against the springs 51, 51.
The regulating arm 84 is pivotally supported on the upper side of the transmission case 4 via a bracket 85 so as to be able to swing freely in the vertical direction, and the lock lever 61 is connected to the rolling control regulating arm 84 via a wire 86. In conjunction with the actuation of the hydraulic switching valve 43, the regulation arm 84 is moved upward to separate the arm 84 from the left and right links 49, 49, supporting the left and right rolling sensors 22, 22 in a vertically movable manner, and In conjunction with the locking operation of the hydraulic switching valve 43, the regulating arm 84 is moved downward to press the arm 84 into contact with the left and right links 49, 49,
The left and right rolling sensors 22, 22 are configured to be lifted and supported at a higher position than the leveling float 18.

This embodiment is configured 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.

As mentioned above, during the horizontal control of the rice transplanting machine, the lock lever 61 is
The locking pin 66 of the spool arm 55 hangs down and supports the locking plate 60 swingably on the inner side of the arcuate surface 59a, and the rolling sensors 22, 2
2, the spool arm 55 is set in a free state so as to be linked with the unevenness detection operation of the tiller, and based on the detection operation signal, the rolling hydraulic pressure switching valve 43 is operated with the rotation of the spool 57, and the horizontal hydraulic cylinder 28 is activated. Automatically controls operation.

In addition, when it is inconvenient for the rice transplanter to tilt due to horizontal control, such as when changing direction at the edge of a ridge after raising the rice transplanter or when driving on the road, the lock lever 61 is lowered as shown by the imaginary line in Fig. 1. When the lock plate 60 is pulled up and the spool arm 55 is in the vertical position, that is, the switching valve 43 is in the neutral position, the locking pin 66 is engaged with the locking groove 59b, and the spool arm 55 is in the inclined state, that is, the switching valve 43 is in the neutral position.
3 is in a position other than the neutral position, the locking pin 66 is brought into sliding contact with the sliding surface 59c on either side, and while the spool arm 55 is returned vertically, the locking pin 66 is engaged with the locking groove 59b. By forcibly holding the rolling hydraulic pressure switching valve 43 in the neutral position, even if the rolling sensor 22 performs a tilt detection operation due to centrifugal force during turning or colliding with an obstacle, the rolling lock mechanism 58 will not spool. 57, the operation of the rolling hydraulic pressure switching valve 43 is prevented, and the operation of the horizontal hydraulic cylinder 28 is restricted, thereby making it possible to stop the horizontal control of the rice transplanting machine.

The above-mentioned horizontal control cancellation operation can also be performed using the planting clutch lever 70.
When the ``off'' operation is performed, the rolling lock mechanism 58 is automatically activated, eliminating the need to forget to operate the lock mechanism 58, and by simplifying the operation, the efficiency of seedling planting work can be improved compared to the conventional method. be.

"Effects of the Invention" As is clear from the above embodiments, the present invention includes a horizontal hydraulic cylinder 28 that adjusts the support height of the left and right running wheels 14, 14 relative to the rice transplanting machine to keep the rice transplanting machine substantially horizontal; In a structure in which rolling sensors 22, 22 are provided to detect the left and right inclination of the rice transplanting machine body, and the rolling hydraulic pressure switching valve 43 of the cylinder 28 is controlled based on the detection by the sensors 22, 22, the rolling hydraulic pressure of the horizontal hydraulic cylinder 28 is Rolling lock mechanism 5 on switching valve 43
8, and is configured to hold the hydraulic pressure switching valve 43 in the neutral position when the locking mechanism 58 locks the rolling, so that the rolling sensors 22, 22 can be lifted and supported from the field or road surface as the rice transplanting machine rises. Even if the rolling sensor 22 generates a control signal to operate the horizontal hydraulic cylinder 28 due to centrifugal force when changing direction at the edge of a ridge or due to collision with an obstacle, the horizontal hydraulic cylinder 28 is operated. Rolling hydraulic switching valve 43
The horizontal hydraulic cylinder 28 is locked by the rolling lock mechanism 58 at the neutral position.
By preventing malfunctions in advance, the rice transplanter can safely operate on the road or when changing direction at the edge of a ridge during rice transplanting without tilting to the left or right, allowing stable operation and making it easier than before. It has practical effects such as ease of handling.

[Brief explanation of drawings]

Fig. 1 is an enlarged explanatory view of the main parts showing one embodiment of the present invention, Fig. 2 is an overall side view, Fig. 3 is a plan view of the same, Fig. 4 is a partially enlarged plan view, and Fig. 5 is the same. 6 is a rear view of the same, FIG. 7 is a hydraulic circuit diagram, FIG. 8 is a partial side view, and FIG. 9 is a plan view of the same. 14... Running wheel, 22... Rolling sensor,
28...Horizontal hydraulic cylinder, 43...Rolling hydraulic switching valve, 58...Rolling lock mechanism.

Claims (1)

[Scope of utility model registration request] A horizontal hydraulic cylinder is provided to keep the rice transplanting machine substantially horizontal by adjusting the support height of the left and right running wheels relative to the rice transplanting machine, and a rolling sensor is provided to detect the left and right inclination of the rice transplanting machine. In the structure for controlling the operation of the rolling hydraulic switching valve of a cylinder, the rolling hydraulic switching valve of the horizontal hydraulic cylinder is provided with a rolling lock mechanism, and the hydraulic switching valve is held in a neutral position when the locking mechanism locks the rolling hydraulic pressure. A planting control device for a rice transplanter characterized by the following.