JPH0440413Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention is equipped with a seedling platform that moves back and forth from side to side, and a planting claw that takes out one seedling from the platform and plants it continuously. The present invention relates to a planting device for a rice transplanter that performs rice transplanting work.

"Prior art" Conventionally, as shown in Japanese Patent Application Laid-open No. 199309/1983, a rotary case is provided that rotates at a constant speed in one direction, and planting claws are arranged symmetrically around the rotational axis of the rotary case. The technology has improved.

``Problems to be solved by the invention'' The above-mentioned conventional technology enables rice planting work at high speed compared to the structure in which the planting claw is attached to the crank arm, but it is difficult to maintain the engine output rotation approximately constant by adjusting the accelerator. While carrying out the work, the running resistance due to muddy soil is greater than when running on the road, so it is easy to start or stop suddenly due to the on/off operation of the running clutch, and the impact causes the rice planting machine to pitch, causing the planted seedlings to fall over and the planting to occur. Problems such as disturbed rice fields occur,
There were problems such as the inability to stably perform the planting operation at the start and end of rice planting work.

"Means for Solving the Problems" However, the present invention provides a rotary case having a plurality of planting claws, which is rotatable in one direction, and
In a rice transplanter equipped with a stepped transmission mechanism that can change the rice planting work speed between low speed and high speed, the stepless speed change mechanism that changes the rice planting work speed steplessly is provided, and the stepped speed change mechanism is changed from a neutral position to a shift position or The present invention is characterized in that the rice planting work acceleration from the shift position to the neutral position can be continuously changed by a continuously variable transmission mechanism.

``Function'' Therefore, it is possible to run or stop without suddenly starting or stopping due to the conventional on/off operation of the travel clutch, and prevent overturning of planted seedlings and disturbance of the planted field surface due to pitching of the rice transplanting machine. Therefore, it is possible to stably perform the planting operation at the start and end of the rice transplanting work in high-speed work, and it is possible to increase the speed and improve the stability of the rice transplanting work more easily than before.

"Embodiments" Examples of the present invention will be described below in detail based on the drawings. Fig. 1 is a plan view of the drive unit, Fig. 2 is a side view of the riding rice transplanter, and Fig. 3 is a plan view of the same.
The rear end of the vehicle body frame 3 on which the vehicle body frame 3 is mounted is connected to a transmission case 4, and front wheels 6 for driving in paddy fields are supported on both sides of the front part of the transmission case 4 via a front axle case 5. A transmission case 7, which is an axle case, is connected to both rear sides of the vehicle, and a rear wheel 8 for running in paddy fields is supported at the rear end of the transmission case 7. and the engine 2
A spare seedling stand 10 is attached to the outside of both sides of the bonnet 9 that covers the vehicle, the transmission case 7 etc. are covered by the vehicle body cover 12 forming the step 11, and the driver's seat 13 is attached to 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
0 so that it can slide left and right, and
As shown in the figure, a rotary case 21 that rotates at a constant speed in one direction is arranged in the planting case 20, and claw cases 22, 22 are arranged in the rotary case 21 at symmetrical positions about this rotation axis, The planting nail 17 is attached to the nail case 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 platform 16 that is equipped with a lifting cylinder 28 that lifts and lowers the planting part 15 via the link mechanism 27, and that drives the front and rear wheels 6 and 8 to move at a substantially constant speed, and at the same time slides back and forth from side to side. The structure is such that one seedling is taken out by a planting claw 17 and rice planting work is performed continuously.

In addition, in the figure, 29 is a traveling speed change lever, 30 is a planting lift lever, 31 is a planting sensitivity adjustment lever, 32
is a traveling clutch pedal, 33, 33 is a left and right brake pedal, 34... is a float for leveling the field,
The floats 34 are supported below the planting case 20 via a planting depth adjustment link 35 or the like.

Furthermore, as shown in FIGS. 4 and 5, the seedling stand 1
6. Alternately move the two planting claws 17, 17 provided on the rotary case 21 via the claw cases 22, 22 to the seedling take-out port 37 of the seedling take-out plate 36 provided at the lower end of the rotary case 21. It is constructed so that two seedlings are planted by the two planting claws 17, 17 by rotation, and a side float 34a larger than the center float 34 is provided, and the side float 34a is used to plant the seedlings of the planting claw 17. It is configured to detect the depth of application.

Next, as shown in FIGS. 5 and 6, a planting claw drive shaft 38 is rotatably supported at the rear end of the planting case 20, and the rotary case 21 is attached to the drive shaft 38.
A sprocket 40 for suspending a planting pawl drive chain 39 is pivotally supported in the middle of the drive shaft 38, and the chain 39 is operatively connected to the drive shaft 38.

In addition, a sun gear shaft 46a is attached to the planting claw drive shaft 38.
The sun gear 46 is loosely fitted through the planting case 2, and the sun gear 46 is loosely fitted through the phase adjustment lever
0, and includes an idle gear 48 and a planetary gear 49 having the same number of teeth as the sun gear 46. Then, the idle gear 48 is connected via the intermediate shaft 50, and the planetary gear 4 is connected via the claw case shaft 51 fixed to the claw case 22.
9 is pivotally supported inside the rotary case 21, and the gears 46, 48, 49 are eccentrically supported on the respective shafts 38, 50, 51, and the sun gear 46 is connected to the sun gear 46 via idle gears 48, 48. The planetary gears 49, 49 are always in mesh with each other.
The sun gear 46 is fixedly supported on the planting case 20, and the rotary case 21 is rotated at a constant speed via the planting claw drive shaft 38, and the planting claws 1 at both ends of the rotary case 21 are rotated at a constant speed.
7 and 17 alternately to the seedling outlet 37 at the lower end of the slope of the seedling stand 16, and the rotary case 2
1, each of the gears 46, 48, 4
9, the claw case shaft 51 is rotated at a non-uniform speed, and the rotation of the claw case shaft 51 is made slower than the rotation of the rotary case 21 from after the seedlings are cut on the seedling stand 16 to the rice field, and the seedlings are planted on the rice field. The rotation of the claw case shaft 51 is made faster than the rotation of the rotary case 21 from the rear up to the seedling take-out port 37, and the rotation of the rotary case 21 and the claw case shaft 51 are made faster in the vicinity of the seedling take-out port 37 and the field planting area. The rotation is approximately equal, and the planting claw 17
The drive shaft 38 at the center of the rotary case 21 is positioned inside a circular shape in side view formed by the planting locus.

Further, one end of the camshaft 53 is rotatably fixed to the rotary case 21 via a position adjustment lever 52, and the camshaft 53 is loosely fitted to the claw case shaft 51.
The cam shaft 53 is connected via a push arm 55 to a push rod 54 that penetrates through the middle and is connected to the push-out claw 17a for forced planting. The push rod 54 is advanced, and the seedlings held in the planting claws 17 are pushed out into the soil by the pushing claws 17a.

Furthermore, a bearing frame 56 disposed opposite to the rotary case 21 is connected to the planting case 2 by a support shaft 57.
0, and the end of the camshaft 53 is rotatably fitted to the fixed shaft 58 of the frame 56,
The end of the pawl case shaft 51 is rotatably supported by a fixed shaft 58, and the pawl case shaft 51 is removably connected to the pawl case 22 with bolts 59, and between the rotary case 21 and the bearing frame 56. On the core of the nail case shaft 51 to be constructed, eight planting nails 17 in four rows, each set of two, are attached in a multi-connected manner.

Further, as shown in FIGS. 7 and 8, the sun gear 46, the idle gear 48, and the planetary gear 4
Reference numeral 9 is provided so that the amount of eccentricity can be freely adjusted, and the shaft holes 60 of the gears 46, 48, 49 are formed as elongated holes extending in the eccentric direction from the center.
The shaft holes 60...
and the shafts 46a, 50, 51.
A guide plate 62 integrally fixes the receiving plate 61 to and slides and guides the receiving plate 61 in the longitudinal direction of the shaft hole 60.
are integrally fixed to the gears 46, 48, 49, and the receiving plate 61 and the guide plate 62 are separably connected and fixed by a bolt 64 inserted through a long hole 63 of a guide plate 62 parallel to the shaft hole 60. bolt 64
The center of rotation of the gears 46, 48, 49 can be adjusted by attaching and detaching the gears.

On the other hand, as shown in FIG. 9, the traveling gear shift lever 29, which is a stepped transmission mechanism for switching the mechanical transmission built in the transmission case 4, is inserted into the guide groove 66 of the lever guide plate 65, and is moved to the neutral position. The lever 29 is configured to be able to move forward or backward, and the speed of rice planting work performed by moving forward can be changed between low speed and high speed, and a switch lever 67 is provided that changes the speed change output of the lever 29 to multi-stage or stepless (continuous speed). .

Furthermore, as shown in FIG.
A continuously variable transmission mechanism 73 has a mechanical transmission section 68 that switches between the gears, a continuously variable transmission mechanism 73 that has split pulleys 69 and 70 for continuously variable transmission, a belt 71, and a variable speed motor 72 that operates the pulley 69 in variable speeds, and a variable speed output to the front and rear wheels 6 and 8. a traveling output section 74 that transmits a planting output section 74 that transmits a planting variable speed output to the planting case 20;
and are provided in the mission case 4, and
The output of the engine 2 is inputted to the mechanical transmission section 68 through the traveling clutch 76 which is operated on and off by the traveling clutch pedal 32, and from the transmission section 68 is transmitted to each output section 7 via the continuously variable transmission mechanism 73.
4 and 75, and synchronizes the traveling speed and the planting speed to perform rice planting work at low or high speed. During the acceleration/deceleration operation from the to the neutral position, the rice planting work acceleration/deceleration can be continuously changed by a continuously variable transmission mechanism 73.

Further, as shown in FIG. 10, the gear shift lever 29
a shift position sensor 77 that detects the shift position between neutral and high speed; a travel clutch sensor 78 that detects the on/off operation of the travel clutch 76; and a fan that switches to multi-stage or continuously variable speed in conjunction with the switch lever 67. The sensors 77, 78 and the switch 79 are connected on and off to a speed control circuit 80 constituted by a microcomputer, and the speed change motor 72 is output connected to the control circuit 80 via a drive circuit 81. The motor 72 is configured to continuously change speed by rotating the motor 72 in forward and reverse directions up to the speed change position of the traveling speed change lever 29.

The present embodiment is constructed as described above, and when the switch 79 is switched to the multi-speed side by operating the switch lever 67, the transmission motor 72 is operated to the highest speed position and the transmission output is maintained at a constant speed. The vehicle is controlled to start and stop through multi-stage shifting using the traveling shift lever 29, and travels on the road, such as moving between fields.

Further, when the switch 79 is switched to the stepless side by operating the switch lever 67, by operating the traveling gear shift lever 29 forward with the traveling clutch 76 in the engaged state, the gear is shifted to the low speed or high speed shifting position of the lever 29. The motor 72 is speed-increased, the rice transplanting work speed is accelerated from neutral to the shift position of the lever 29, the speed is continuously changed, the speed is increased steplessly to the shift position of the lever 29, and the rice planting work is started.

On the other hand, when the travel clutch 76 is disengaged or the speed change lever 29 is returned to neutral, the speed change motor 7
2 to the lowest speed (neutral) position, the rice transplanting work speed is continuously reduced from the shift position of the lever 29 to the neutral position, and the rice transplanting machine is stopped to finish the rice transplanting work, and the rice transplanting work is started. At the end of the operation, the variable speed motor 72 is rotated in forward and reverse directions to gradually start and stop, thereby eliminating shocks such as pitting of the rice transplanting machine due to sudden starts and stops.

Furthermore, FIGS. 12 and 13 show modified examples of the rotary case 21. In the above embodiment, the sun gear 46, the idle gear 48, and the planetary gear 49 were formed of perfect circular gears.
As shown in the figure, each of the gears 46, 48, 49 can be formed of an egg-shaped non-circular gear, and as shown in FIG.
9 can also be formed by a square non-circular gear, which can reliably transmit inconstant velocity motion to the pawl case shaft 51 in synchronization with the rotation of the rotary case 21, as in the above embodiment. .

"Effects of the Invention" As is clear from the above embodiments, the present invention provides a rotary case 21 having a plurality of planting claws 17 rotatable in one direction, and the rice planting work speed can be changed between low and high speeds. In a rice transplanter equipped with a stepped transmission mechanism such as a traveling speed change lever 29, a continuously variable transmission mechanism 73 that changes the rice planting work speed steplessly is provided, and the stepped transmission mechanism 29 is changed from a neutral position to a shift position or a shift position. The rice planting work acceleration/deceleration from the to the neutral position can be continuously changed by a continuously variable transmission mechanism 73, and the conventional traveling clutch 76
It is possible to prevent the rice transplanter from suddenly starting or stopping due to the on/off operation, and to gradually run or stop the rice transplanter, and it is possible to prevent the planted seedlings from falling over and the planted field surface from being disturbed due to pitching of the rice transplanter. Practical effects such as being able to stably perform the planting operation at the start and end of rice transplanting work in high-speed work, making it easier to speed up rice transplanting work and improve stability than before. It is something that plays.

[Brief explanation of drawings]

Fig. 1 is an explanatory plan view of the drive section showing one embodiment of the present invention, Fig. 2 is a side view of the whole, Fig. 3 is a plan view of the same, Fig. 4 is a side view of the planting section, Fig. 5 6 is an enlarged view of the same part, FIGS. 7 and 8 are explanatory diagrams of the same part, FIG. 9 is an explanatory diagram of the traveling speed change lever, FIG. 10 is a traveling speed control circuit diagram, and FIG. 11 is a diagram of the traveling speed control circuit. The figure is a flowchart, and FIGS. 12 and 13 are explanatory diagrams showing modified examples of the rotary case. 17... Planting nail, 21... Rotary case, 2
9...Traveling speed change lever (stepped transmission mechanism), 73...
...Continuously variable transmission mechanism.

Claims (1)

[Scope of utility model registration request] In a rice transplanter equipped with a rotary case having a plurality of planting claws that is rotatable in one direction and a stepped transmission mechanism capable of changing the rice transplanting speed between low and high speeds, the rice transplanting speed can be changed steplessly. 1. A rice transplanter comprising a continuously variable transmission mechanism, and the rice transplanting operation acceleration/deceleration from a neutral position to a shift position or from a shift position to a neutral position of the stepped transmission mechanism can be continuously changed by the continuously variable transmission mechanism.