JPH0436577Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention has a planting section that has a seedling stand that moves back and forth from side to side and planting claws that take out one seedling from this seedling stand and plant it. The present invention relates to a planting control device for a rice transplanter that is equipped with a rice transplanter and performs rice transplanting work continuously.

``Prior Art'' Conventionally, as shown in Japanese Patent Application Laid-open No. 181610/1983, there has been a technique in which a planting section is provided on a traveling machine body via a rolling fulcrum so that it can be horizontally adjusted.

"Problems to be Solved by the Invention" The above-mentioned conventional technology horizontally adjusts the planting area using a single-acting hydraulic cylinder. Because pressure was used to correct the inclination of the other planting part and the planting part's own weight was used to correct the inclination, the left and right inclination correction speeds were different, making it difficult to improve the horizontal adjustment function and increase the planting speed. However, there were problems such as a unidirectional rotational moment constantly acting on the connecting portion between the traveling body and the planting section.

``Means for Solving the Problems'' However, the present invention is a planting control device for a rice transplanter in which a planting part is horizontally adjustable via a rolling fulcrum shaft on a traveling machine body, and the present invention is a rice transplanter that has a piston rod that protrudes from both sides. The present invention is characterized in that it is equipped with a dynamic hydraulic cylinder, that the hydraulic cylinder is attached to the traveling body side, and that the piston rods on both sides of the hydraulic cylinder and the planting portion are connected via a buffer spring.

"Function" Therefore, the hydraulic cylinder can correct each of the left and right tilts of the planting section at approximately constant speed, making it easier to improve the horizontal adjustment function and increase the planting speed than before. In addition, the hydraulic cylinder, piston rod, buffer spring, etc. can be easily arranged symmetrically around the rolling fulcrum axis, and the planting part and the hydraulic cylinder can be supported with good left-right balance, and the planting part and the The buffer spring that connects the piston rod can easily reduce the transmission of impact force from the planting part to the piston rod side, and can easily prevent damage to hydraulic cylinders and the like and simplify the mounting structure. .

"Embodiments" Examples of the present invention will be described below in detail based on the drawings. Figure 1 is a planting control circuit diagram, Figure 2 is a side view of the riding rice transplanter, and Figure 3 is a plan view of the same. Attach the rear end of the body frame 3 to the transmission case 4
A front wheel 6 for driving in paddy fields is supported on both sides of the front part of the transmission case 4 via a front axle case 5, and a transmission case 7, which is an axle case, is connected to both sides of the rear part of the transmission case 4.
are arranged in series, and the rear end of the transmission case 7 supports a rear wheel 8 for running in paddy fields. A spare seedling stand 10 is attached to the outside of both sides of the bonnet 9 that covers the engine 2, and the transmission case 7 and the like are covered by the vehicle body cover 12 forming the step 11, and the driver's seat 13 is mounted on the upper part of the vehicle body cover 12. A steering handle 14 is provided at the rear of the bonnet 9 in front of the driver's seat 13.

Furthermore, 15 in the figure is a planting section that has a seedling stand 16 for multi-row planting, a plurality of planting claws 17, etc., and the rear-tilting seedling stand 16 with a high front height and a low back is connected to a guide rail 18 and Planting case 2 via guide rail 19
The planting claws 17 are attached to the planting case 20 via a planting arm 21 that is supported by the planter 0 so as to be slidable left and right and can be moved by a crank, and a planting claw drive shaft 22. Further, a support frame 24 is provided on the front side of the planting case 20 via a center pin 23, and the support frame 24 is connected to the rear side of the traveling vehicle 1 via a three-point link mechanism 27 including a top link 25 and a lower link 26. , a seedling holder which is equipped with a hydraulic cylinder 28 which is an elevation adjustment member for raising and lowering the planting section 15 via the link mechanism 27, and drives the front and rear wheels 6, 8 to travel at a substantially constant speed, and at the same time slides back and forth from side to side. One seedling is taken out from a stand 16 by a planting claw 17, and rice planting work is continuously performed.

In addition, in the figure, 29 is a travel gear shift lever, 30 is a planting lift lever, 31 is a travel sub-shift lever, 32 is a travel clutch pedal, 33, 33 are left and right brake pedals, 34 is a center float, and 35, 35 are a pair of side wheels. The floats 36, 36 are a pair of outermost floats, and the center float 34 is arranged on the longitudinal center line of the rice transplanting machine, and the side floats 35 and the outermost floats 36 are arranged symmetrically with respect to the longitudinal center line. are doing.

As shown in FIGS. 4 and 5, a center pin 23 fixed to the front side of the planting case 20 is rotatably supported on a receiving tube 37 of the support frame 24, and the planting portion is centered around the center pin 23. A hydraulic cylinder 38 is a horizontal adjustment member that is attached to the planting portion 15 so as to be tiltable left and right, and also tilts the planting portion 15 left and right around the center pin 23 to horizontally support it.
The cylinder 38 is attached to the upper side of the support frame 24 via a frame 39, and a rod 42 is connected to the piston rod 40 of the cylinder 38 via an arm 41 substantially parallel thereto. The middle part of the rod 42 is slidably inserted into the substrate 43 on the front side of the planting case 20, and the arm 41 and the substrate 43 are inserted.
A buffer spring 44 is wound around the intermediate rod 42, and the planting portion 15 is tilted left and right with respect to the traveling vehicle 1 about the center pin 23 by controlling the movement of the piston rod 40 of the cylinder 38. As is clear from the above, in the planting control device for a rice transplanter in which the planting part 15 is horizontally adjustable in the traveling vehicle 1, which is the traveling body, through the center pin 23, which is the rolling fulcrum shaft, the piston rods 40 are placed on both sides. A double-acting hydraulic cylinder 38 is provided to protrude,
The hydraulic cylinder 38 is attached to the traveling body 1 side, and the piston rods 40 on both sides of the hydraulic cylinder 38 and the planting part 15 are connected via a buffer spring 44.

Further, as shown in FIGS. 4 and 6, the front upper surface of the outermost float 36 is connected and supported to the connecting pipe 20a of the planting case 20 via bendable links 45, 46, 47 and a bracket 48. ,
A planting depth adjustment shaft 49 is rotatably supported on the lower side of the planting case 20, and the front end of a ground pressure detection arm 50 is rotatably supported on the adjustment shaft 49, and is provided on the rear upper surface of the outermost float 36. The rear end of the detection arm 50 is connected to a bracket 51 via a support shaft 52. The front end of a planting depth adjustment arm 53 is fixed to the adjustment shaft 49, and the rear end of the adjustment arm 53 is extended so as to be able to come into contact with the lower surface of the detection arm 50 from below. 50, 53, and also includes potentiometer-type left and right planting sensors 55, 56 for detecting the left and right inclination of the planting section 15 and changes in the planting depth of seedlings caused by the planting claws 17. Left and right planting case 2
The left and right planting sensors 55, 56 are attached to 0, 20, respectively, and the sensors 55, 56 are linked to 57, 58.
Accordingly, the sensors 55 and 56 are configured to detect the upward movement of the outermost float 36 connected to the detection arm 50 and lifting the detection arm 50 against the detection spring 54.

Further, the base end of the planting depth adjustment lever 59 is connected to the adjustment shaft 49, and the intermediate portion of the lever 59 is removably locked to the planting depth adjustment plate 60 provided in the planting case 20. The planting depth of seedlings is set by changing the relative support interval between the planting case 20 and the float 36 by operation, and like the outermost float 36, the front side of the center float 34 and side floats 35, 35 Link 4
6, 47, while the rear sides of the center float 34 and side floats 35, 35 are supported by the planting depth adjustment arm 53 on the adjustment shaft 49, and by operating the lever 59, all the floats 34, 35, 36 is configured to be raised and lowered.

7 and 8 show each of the hydraulic cylinders 28,
As shown in FIG. 7, the hydraulic pump 6 is connected to the lifting adjustment hydraulic cylinder 28 via a 3-position 3-port electrohydraulic switching valve 63 having lifting and lowering solenoids 61 and 62.
4 are connected in communication, and as shown in FIG. , each cylinder 38 is configured to be operable by operating each of the switching valves 63 and 67.

Further, as shown in FIGS. 1 and 9, a hydraulic lift sensitivity setting device 69 for initially setting the lift sensitivity value A, which is the reference ground pressure of each of the outermost floats 36, 36.
, a hydraulic elevation dead zone setting device 70 that initially sets an elevation dead zone value B centered on the sensitivity value A, and a left/right tilt correction that initially sets a horizontal dead zone value C, which is the dead zone output difference between the left and right planting sensors 55 and 56. A microcomputer-type planter that connects the dead zone setting device 71, the planting sensors 55, 56, and the setting devices 69, 70, 71 as inputs and compares and calculates the left and right ground pressure D1, D2 outputs of each sensor 55, 56. An automatic control switch 74 is provided to apply a power source 73 to the control circuit 72, and the lifting and lowering solenoids 61 and 62 are controlled via a lifting driver 75, and the right and left tilting solenoids 65 and 62 are controlled via a horizontal driver 76. 66 are connected to the planting control circuit 70, respectively. Then, the left and right planting sensors 55, 56 detect changes in the ground pressure of the left and right outermost floats 36, 36 located symmetrically with respect to the longitudinal center line of the rice transplanting machine, and each of the left and right sensors 5
Horizontal driver 76 based on the output difference between 5 and 56.
The planting section 15 is operated by a hydraulic cylinder 38 via a hydraulic cylinder 38, etc.
is tilted from side to side to support it approximately horizontally with respect to the planting field surface, and the average value of the output of each of the sensors 55, 56 and the input of the setting devices 69, 70 are compared and calculated, and the The planting section 15 is raised and lowered by the hydraulic cylinder 28 to keep the planting depth of the seedlings substantially constant.
The horizontal control of the hydraulic cylinder 8 and the vertical control of the hydraulic cylinder 28 are simultaneously and independently performed.

The present invention is constructed as described above, and as shown in the flowchart of FIG.
2 to initialize each setter 69, 70, 71, and also turn on the left and right planting sensors 55,
56 ground pressure D1 and D2 signals are input, and each sensor 5
The planting control circuit 70 determines whether the inputs 5 and 56 are equal or not, and whether the inputs are within a set range. When the planting part 15 is tilted left and right with respect to the planting field surface by more than the setting (|D1-D2|>C), the output difference between the left and right sensors 55, 56 (whether D1-D2>0 or not) Calculate,
It is determined whether the planting part 15 is tilted to the right or left, and the right or left tilt solenoids 65 and 66 are actuated via the horizontal driver 76 to control the operation of the hydraulic cylinder 38 to correct the left and right tilt of the planting section 15. , the planting section 15 is supported substantially horizontally with respect to the planting field.

Further, when the planting section 15 is supported horizontally and when the rolling control by the hydraulic cylinder 38 is completed, each of the sensors 55, 56
Average ground pressure D1, D2 output [(D1+D2)/2]
and the reference value (A+B/2 or A-B/2) of each setter 69, 70, and determine the ground pressure D1,
Determine whether the average D2 output is above or below the setting, and determine the difference between the ground pressure output and the reference value [(D1
+D2)/2>A+B/2 or (D1+D2)/2
<A-B/2], the raising or lowering solenoids 61 and 62 are operated via the raising/lowering driver 75, the hydraulic cylinder 28 is actuated and the planting part 15 is raised and lowered, and the three-point linkage mechanism 27 By adjusting the support height of the planting part 15, the ground pressure of the float 36 is kept within a set range, and the planting depth of the seedlings of the planting claws 17 is kept substantially constant.

"Effects of the Invention" As is clear from the above embodiments, the present invention has the ability to connect the planting part to the traveling machine body 1 via the rolling fulcrum shaft 23.
5, the rice transplanter is equipped with a double-acting hydraulic cylinder 38 that protrudes a piston rod 40 on both sides, and the traveling machine 1
The hydraulic cylinder 38 is attached to the side, and the piston rods 40 on both sides of the hydraulic cylinder 38 are connected to the planting section 15 via a buffer spring 44.
The left and right tilts can be corrected at approximately constant speed, and the horizontal adjustment function and planting speed can be improved more easily than before, and the hydraulic cylinder 38 and piston rod 4
0 and the buffer spring 44 are connected to the rolling fulcrum shaft 23.
It can be easily arranged symmetrically around the planting part 15.
It can support the hydraulic cylinder 38, etc. with good left and right balance, and the planting part 15 and the piston rod 4 can be
The transmission of the impact force from the planting part 15 to the piston rod 40 side can be easily reduced by the buffer spring 44 connecting the piston rod 0, and the damage to the hydraulic cylinder 38 etc. can be easily prevented and the mounting structure can be simplified. It is something that can be done.

[Brief explanation of the drawing]

Fig. 1 is a planting control circuit diagram showing an embodiment of the present invention, Fig. 2 is a side view of a riding rice transplanter, Fig. 3 is a plan view thereof, Fig. 4 is a partial side view, Figs. 6 is a partial plan view, FIGS. 7 and 8 are hydraulic circuit diagrams, and FIG. 9 is a flowchart of the planting control circuit. 15... Planting part, 28... Hydraulic cylinder (elevation adjustment member), 36... Outermost float, 38...
Hydraulic cylinder (horizontal adjustment member), 55, 56...
Planting sensor.

Claims (1)

[Scope of utility model registration request] A planting control device for a rice transplanter in which a planting part 15 is horizontally adjustable via a rolling fulcrum shaft 23 on a traveling machine body 1 is provided with a double-acting hydraulic cylinder 38 that projects a piston rod 40 on both sides. A planting control device for a rice transplanter, characterized in that the hydraulic cylinder 38 is attached to the side, and the piston rods 40 on both sides of the hydraulic cylinder 38 and the planting part 15 are connected via a buffer spring 44.