JPS6312664Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" The present invention is applicable to a passenger vehicle consisting of a planting section having a seedling stand and planting claws, and a riding section consisting of an agricultural tractor or a vehicle dedicated to rice planting. In the rice transplanter, the planting section is installed in the riding section via a three-point linkage mechanism so that it can be raised and lowered freely, and left and right side floats are arranged in parallel on both sides of the center float, and each float supports a seedling stand and a The present invention relates to a planting device configured to support planting nails.

"Prior art" Previously, Japanese Patent Application Laid-Open No. 50-40311 and Utility Model Application No. 54-9022
As shown in the publications of the above issues, there is a technology that detects the horizontal inclination of the planting section by vertical movement of left and right floats, and operates a hydraulic cylinder to support the planting section horizontally.

"Problems to be Solved by the Invention" In the conventional technology, as the traveling vehicle tilts to the left and right with respect to the planted field surface, the planting section tilts to the left and right with respect to the traveling vehicle, and the hydraulic cylinder also serves as the hydraulic cylinder. Since the structure is such that the planting section is lifted up, by lifting the planting section using the hydraulic cylinder, the planting section rises while tilted to the left and right, which helps maintain the balance of the vehicle when changing direction on a headland. In addition, there were problems such as the tendency for vehicles or ridges to interfere with the descending side of the planting section.

``Means for solving the problem'' However, the present invention detects the left and right inclination of the planting part by using a lifting hydraulic cylinder installed on a traveling vehicle to raise and lower the planting part, and the vertical movement of left and right side floats. It is equipped with an inclination correction member that works in conjunction with a sensor to correct the left and right inclination of the planting section with respect to the planting field surface, and also controls the lifting operation of the left and right side floats when the planting section is lifted above the ground by operating the lifting hydraulic cylinder. The sensor is installed for detection, and based on the detection result of the left and right side float lifting motion of the sensor, the inclination correction member is automatically controlled so that the planting part becomes approximately horizontal with respect to the traveling vehicle. It is something to do.

"Function" Therefore, even if the planting part is tilted to the left or right with respect to the traveling vehicle during rice planting work, by lifting the planting part, the planting part can be moved by automatic control of the tilt correction member. Because it is automatically supported almost horizontally to the car,
It is possible to lift the planting part without disturbing the balance of the traveling vehicle when changing direction on a headland, and it is also possible to prevent the planting part from interfering with the traveling vehicle or the ridge when lifted, and moreover, The hydraulic cylinder and the slope correction member can be driven and controlled by separate systems, and the control structure for the slope correction member can be simplified and functionally obtained, in addition to the automatic control structure for adjusting planting using the lifting cylinder.

"Embodiment" An embodiment of the present invention will be described below in detail based on the drawings. Fig. 1 is a schematic side view of the riding rice transplanter, and Fig. 2 is a plan view of the same.
4 and 5 are connection frames that connect the front and rear car bodies 2 and 3 so as to be bendable only in the horizontal direction via a rotation fulcrum shaft 6; Front and rear wheels for paddy fields installed by
11 is a column whose base end is fixed to the front vehicle body 2; 12 is a preliminary seedling stand supported by the column 11; 13 is a driver's seat that is attached to the upper rear part of the front vehicle body 2 via the column 11; and 14 is the driver's seat. 13 is a hydraulic switching valve provided on the lower surface; 15 is a lift lever for operating the switching valve 14; 16 is a steering handle provided above the front of the front vehicle body 2; and 17 is an engine mounted on the rear vehicle body 3.

In addition, 18 in the figure is a planting part for 6-row planting that is installed in the front part of the front vehicle body 2 via a three-point linkage mechanism 19 so as to be able to be raised and lowered, and 20 is a planting part for 6-row planting that can be moved back and forth from side to side. a seedling platform; 21 is a planting claw for taking out and planting one seedling from the seedling platform 20; 22 is a transmission case to which the seedling platform 20 and planting claw 21 are attached;
23a, 23b, and 23c are the transmission case 22;
The center and side floats 24 are attached to the transmission case 22, and the front bumper 25 is a fixed frame that supports each transmission case 22.
The seedling stand 20 and the planting claws 21 are appropriately driven via the transmission shaft 26, and the seedlings are continuously planted.

As shown in FIG. 3, the three-point linkage mechanism 19 includes a pair of lower links 27, 27 and a top link 2.
8, and a lift arm 30 is connected to the middle of the lower link 27 via a connecting rod 29. The long hole 32 at the lower end of the connecting rod 29 is engaged with the planting pin 31 on the side surface of the lower link 27, and the connecting rod 29
A spring 33 is stretched between the lower link 27 and the lift arm 30 in parallel to
The lift arm 30 is stopped at a certain position so that the floats 23a, 23b, 23c sink to a certain depth in the field and the ground pressure (ground load) of the floats 23a, 23b, 23c and the tension spring force of the spring 33 are balanced. The planting part 18 is connected to the lift arm 30 so that it can be raised and lowered within a set range in a state where the planting part 18 is
Piston rod 3 of hydraulic cylinder 34 installed on
5 to the lift arm 30, and lift lever 1
5 operations, the cylinder 34 is appropriately driven to raise and lower the planting section 18. When the hydraulic cylinder 34 is operated and the planting section 18 is lifted above the ground, the pin 31, which is the restoring mechanism, The planting portion 18 is configured to be always substantially horizontal with respect to the traveling vehicle 1 by being supported by the elongated hole 32.

Furthermore, the front end side of each float 23a, 23b, 23c is attached to the front bumper 24 via the buffer member 36..., and the intermediate part of each float 23a, 23b, 23c is attached to the transmission case 22... and the depth adjustment lever 3
7, respectively, and the supporting height of the transmission case 22, that is, the amount of penetration of the planting claws 21 into the soil, is set arbitrarily, and the seedlings are planted at a constant depth.

Further, as shown in FIGS. 3 and 4, brackets 38 and 39 are provided above the front end of the front body 2, and left and right balance hydraulic cylinders 40 and 4 are tilt correction members that adjust the ground pressure of the side floats 23b and 23c.
1 to each bracket 38, 39 of the traveling vehicle 1, and between the piston rods 42, 43 of the cylinders 40, 41 and the symmetrical position of the lower end of the fixed frame 25 of the planting section 18, the horizontal swing of the planting section 18 is fixed. The left and right auxiliary springs 44 and 45 for preventing (rolling) are stretched, and the three-point link mechanism 19 and the auxiliary spring 4
4 and 45, the planting portion 18 is suspended and supported. On the other hand, left and right ground pressure sensors 46 and 47 that detect changes in ground pressure of the left and right side floats 23b and 23c,
Left and right ground pressure adjustment switches 48 and 49 for correction output connected to the respective sensors 46 and 47 are fixed to the front ends of the left and right transmission cases 22 and 22. , 49 are provided with a neutral dead zone width, and connected to each sensor 46, 47 in conjunction with the float 23.
When this front part moves up and down due to a change in the ground pressure of b and 23c and the buffer members 36 and 36 expand and contract more than the set value, the sensors 46 and 47 are displaced beyond the width of the neutral dead zone and the switches 48 and 49 are switched. Configure it to operate. Further, the hydraulic cylinder 4 is
Hydraulic pumps 52 and 53 are connected to terminals 0 and 41, respectively, and the upward output terminals 48a and 49a of the switches 48 and 49 are connected to the upward operation solenoids 50a and 51a of the switching valves 50 and 51, respectively, and the downward operation of the switches 48 and 49 is connected to The output terminals 48b and 49b are connected to the lowering operation solenoids 50b and 50b of the switching valves 50 and 51.
50b, respectively. By operating the switching valves 50, 51 using the switches 48, 49, the piston rods 4 of the cylinders 40, 41 are independently controlled.
2 and 43 as appropriate, and each spring 44 and 4
Side float 23 by changing the tensile force of 5
The left and right side floats 23b when the planting section 18 is lifted above the ground by operating the lifting hydraulic cylinder 34 while balancing the ground pressures of b and 23c and correcting the left and right inclination of the planting section 18 with respect to the planted field surface. ,23
c the sensors 46, 47 to detect the lifting motion;
is installed, and each of the cylinders 40, 41 is automatically controlled based on the detection results of the left and right side floats 23b, 23c lifting operation by the sensors 46, 47 so that the planting section 18 is approximately horizontal with respect to the traveling vehicle 1. I have to.

The present embodiment is configured as described above, and for example, when the seedlings placed on the seedling stand 20 are shifted to either the left or right side, the weight of the seedlings is shifted to the left and right side floats 23b, 2.
3c as a grounding load, and the grounding pressure of one side float 23b or 23c becomes higher than the other, and the planting part 18 along with the riding part 1 is placed on either the left or right side due to, for example, changes in the depth of the field. If the ground pressure of one side float 23b or 23c is higher than the other, as described above, if the ground pressure of either the left or right side float 23b or 23c becomes higher than the set value, the Side float 23b or 2
3c rises, the ground pressure sensor 46 or 47 that is in contact with the upper surface is displaced, the ground pressure adjustment switch 48 or 49 is switched, an output is generated from the rise output terminal 48a or 49a, and the rise operation solenoid 50a or 51a is activated. The switching valve 50 or 51 is switched by excitation, the hydraulic pressure of the pump 52 or 53 is applied to the cylinder 40 or 41, the piston rod 42 or 43 is retracted, and the auxiliary spring 44 is
Alternatively, by pulling 45, the ground pressure of the side floats 23b or 23c is reduced, and the ground pressures of the left and right side floats 23b, 23c are balanced. On the other hand, when the ground pressure of either the left or right side float 23b or 23c becomes lower than the set value, the sensor 46 or 47 is displaced following the lowering of the side float 23b or 23c, and the switch 48 or 4
The solenoid 50b or 51b is energized through the lowering output terminal 48b or 49b of 9, the hydraulic pressure of the cylinder 40 or 41 is returned to the oil tank through the switching valve 50 or 51, and the piston rod 42 or 43 is advanced to provide assistance. By reducing the spring 44 or 45, the side float 23b or 2
Increase the ground pressure of 3c, left and right side float 2
This is to balance the ground pressure of 3b and 23c.

Furthermore, when the hydraulic cylinder 34 is activated by operating the lift lever 15 to lift the planting section 18 above the ground, the cylinders 40 and 41 are simultaneously activated by the outputs of the left and right sensors 46 and 47, so the vehicle can be driven while in the rice-planting state. Even if the planting part 18 is tilted left and right with respect to the vehicle 1, the planting part 18 is supported substantially horizontally with respect to the traveling vehicle 1 by lifting the planting part 18 above the ground.

"Effects of the Invention" As is clear from the above embodiments, the present invention includes the lifting hydraulic cylinder 34 for lifting and lowering the planting section 18 installed on the traveling vehicle 1, the left and right side floats 23b,
It is provided with inclination correction members 40 and 41 that correct the left and right inclination of the planting part 18 with respect to the planted field surface in conjunction with sensors 46 and 47 that detect the left and right inclination of the planting part 18 by the vertical movement of 23c. The sensors 46, 47 are installed to detect the lifting operation of the left and right side floats 23b, 23c when the hydraulic cylinder 34 is operated to lift the planting section 18 above the ground. Based on the detection result of the lifting operation, the inclination correction members 40 and 41 are automatically controlled so that the planting part 18 becomes approximately horizontal with respect to the traveling vehicle 1. Even if the attaching part 18 is tilted to the left or right, by lifting the planting part 18, the planting part 18 will automatically become approximately horizontal with respect to the traveling vehicle 1 by automatic control of the inclination correction members 40 and 41. Since it is supported, the planting part 18 can be lifted without disturbing the balance of the traveling vehicle 1 when changing direction on a headland, and when lifted, the planting part 18 does not touch the traveling vehicle 1 or a ridge. Interference can be prevented, and the lifting hydraulic cylinder 34 and the slope correction members 40, 41 can be driven and controlled in separate systems, and the slope correction members 40, 41 can be controlled separately from the automatic control structure such as planting adjustment by the lifting cylinder 34. 4
This has practical effects such as simplifying the control structure of No. 1 and making it functional.

[Brief explanation of the drawing]

Fig. 1 is a side view of a riding rice transplanter showing an embodiment of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a side view of the main parts, and Fig. 4 is an operational system diagram. 1... Traveling vehicle, 18... Planting section, 23b, 23
c...Side float, 34...Hydraulic cylinder for elevation, 40, 41...Hydraulic cylinder for left and right balance (inclination correction member), 46, 47...Sensor.

Claims (1)

[Scope of utility model registration request] A hydraulic cylinder 34 for raising and lowering the planting part 18 installed on the traveling vehicle 1, and left and right side floats 2.
In addition to being provided with inclination correction members 40 and 41 that correct the left and right inclination of the planting part 18 with respect to the planted field surface in conjunction with sensors 46 and 47 that detect the left and right inclination of the planting part 18 by vertical movement of 3b and 23c, Left and right side floats 23b, 23 when the lifting hydraulic cylinder 34 is operated to lift the planting section 18 above the ground
c the sensors 46, 47 to detect the lifting motion;
is installed, and the inclination correction members 40 and 41 are automatically controlled so that the planting section 18 becomes approximately horizontal with respect to the traveling vehicle 1 based on the detection results of the left and right side floats 23b and 23c lifting operation by the sensors 46 and 47. A planting device for a rice transplanter characterized by: