JPH0446507Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention relates to a rice transplanter that takes out one seedling from a seedling stand using the planting claw and plants it in the field one by one.
The present invention relates to a rotary planting device in which a rotary case having a plurality of planting claws is supported in a planting case of a planting part, and seedling planting work is performed by each planting claw by rotation of the rotary case.

"Prior Art" Utility Application No. 172126, filed by the applicant
For example, when starting work, when the planting part is lowered and the planting clutch is engaged, the planting claws immediately start planting work at the normal planting speed.

``Problem that the invention seeks to solve'' In such cases, the planting claws are subjected to impact forces ranging from static to sudden movements, which makes it difficult for the planting claws to take out seedlings immediately after the start of planting, or to place seedlings on the rice field. Planting did not give good results. This was particularly noticeable immediately after the start of planting while driving at high speeds.

"Means for Solving Problems" Therefore, the present invention provides an auxiliary transmission mechanism at the rear of the output side of the planting transmission mechanism section that changes the speed of the planting section, and starts the work of the planting section. The auxiliary transmission mechanism is configured to be interlocked with the operation.

"Operation" According to the present invention, immediately before the planting section is lowered to start planting, the auxiliary speed change mechanism is set to a low speed to drive the planting claws at a lower speed than usual, and Immediately after some time has elapsed from the start, the drive speed of the planting claw is returned to the normal normal speed state, and the impact during the initial drive of the planting claw, the impact when taking out seedlings and planting rice seedlings by this planting claw is reduced. This makes it possible to start the planting operation optimally, smoothly, and favorably, especially when driving at high speeds.

"Embodiments" Examples of the present invention will be described below in detail based on the drawings. Fig. 1 is an explanatory plan view of the planting drive unit, Fig. 2 is a side view of the riding rice transplanter, and Fig. 3 is a plan view of the same.
In the figure, 1 is a traveling vehicle on which a worker rides, and the rear end of a vehicle body frame 3 on which an engine 2 is mounted is connected to a transmission case 4, and a front axle case 5 is installed on both sides of the front part of the transmission case 4. At the same time, an axle case 7 is connected to both sides of the rear of the transmission case 4, and a rear wheel 8 for running in paddy fields is supported at the rear end of the axle case 7.
to support. A spare seedling stand 10 is attached to the outside of both sides of the bonnet 9 that covers the engine 2, and the axle case 7 and the like are covered by the body cover 12 forming a step, and the driver's seat 13 is mounted on the top of the body cover 12. Installation, its driver seat 13
A steering handle 1 is located at the rear of the bonnet 9 in front of the bonnet 9.
4 will be provided.

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 and rear bottom is connected to a guide rail 18. A rotary case 21 is supported by a planting case 20, which is a planting transmission case, through a guide rail 19 so as to be able to slide back and forth from side to side, and rotates at a constant speed in one direction as shown in FIG. Claw cases 22, 22 are arranged in the case 20 at symmetrical positions with respect to the rotation axis, and a planting claw 17 is attached to the tip of the claw case 22. In addition, the planting case 20
The support frame 2 is attached to the front side of the support frame 2 via the pivot shaft 23.
4, top link 25 and lower link 2
A support frame 24 is connected to the rear side of the traveling vehicle 1 via a three-point linkage mechanism 27 including a three-point linkage mechanism 27, and an elevating cylinder 28 for elevating the planting section 15 via the linkage mechanism 27 is provided. At the same time, one seedling is taken out by a planting claw 17 from a seedling platform 16 which is slid back and forth from side to side, 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 are left and right brake pedals, 34... is a float for field leveling, and the float 34... is supported on the lower side of the planting case 20 via a planting depth adjustment link 35, etc. are doing.

Furthermore, a guide rail 1 provided at the lower end of the seedling stand 16
For the seedling extraction port 37 of the seedling extraction plate 36 in 8,
Rotary case 21 via claw cases 22, 22
Two planting claws 17, 17 provided in the rotary case 21 are moved alternately, and two seedlings are planted by the two planting claws 17, 17 in one rotation of the rotary case 21.

As shown in FIGS. 5 and 6, a planting claw drive shaft 38, which is an output shaft, is rotatably supported at the rear end of the planting case 20, and rotary cases 21, 21 are symmetrically mounted on both ends of the drive shaft 38. It is fixed to Further, a sun gear 39 is loosely fitted to the planting claw drive shaft 38 in the rotary case 21, and the sun gear 39 is fixed in position to the planting case 20 via a phase adjustment lever 40 so as to be able to freely adjust the phase.
9, the idle gear 41 is connected to the rotary case through an intermediate shaft 43, and the planetary gear 42 is connected to the pawl case shaft 45 via a bolt 44 to the pawl case 22. It is pivoted within 21. Each gear 39, 41, 42 is connected to each shaft 38,
43 and 45 are eccentrically supported by a certain dimension, and the idle gear 4 is symmetrically supported to the sun gear 39 in the center.
Two planetary gears 42, 42 via 1, 41
The sun gear 39 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. , 17 are provided so as to be alternately moved downward to the seedling outlet 37 at the lower end of the slope of the seedling platform 16. In conjunction with the rotation of the rotary case 21, the gears 39,
41 and 42, the claw case shaft 45 is rotated at a non-uniform speed, and the rotation of the claw case shaft 45 is caused by the rotation of the rotary case 21 while the claw case shaft 45 reaches the seedling planting position from the seedling take-out position of the planting claw 17. The rotation is slowed down, and the rotation of the claw case shaft 45 is made faster than the rotation of the rotary case 21 between the seedling planting position of the rotary case 21 and the seedling removal position, so that the movement locus l by the planting claw 17 matches the drive shaft. 38 is configured to draw a vertically long closed loop oval on the front side. In other words, the claw case shaft 45 rotates freely with respect to the rotation of the rotary case 21 when reaching the seedling removal position, and the planting claw 1
7 orientation is directed upward, while the claw case shaft 45 rotates with a delay with respect to the rotation of the rotary case 21 when reaching the seedling planting position, so that the planting claw 17 orientation is directed downward.

Further, the claw case shaft 45 allows a camshaft 46 to freely rotate therethrough, and one end of the camshaft 46 is fixedly supported by the rotary case 21 via a position adjustment plate 47 and a bolt 48 so as to be rotatably adjustable. , a push rod 49 that connects the other end of the cam shaft 46 to the extrusion claw 17a for forced planting in the claw case 22;
The pusher arm 50 and the pushing cam 51 are connected to each other, so that when the planting claws 17 enter the field, the push rod 49 is advanced and the seedlings sandwiched between the planting claws 17 are pushed out into the soil by the pushing claws 17a. It consists of

On the other hand, the input shaft 4a of the transmission case 4 is interlocked and connected to the output shaft 2a of the engine 2 via an auxiliary transmission mechanism 52 that performs two-speed gear changeover between low speed and high speed. The transmission case 4 is equipped with a planting transmission mechanism 53 that changes the speed of the output, and an auxiliary transmission mechanism is provided in the drive system between the output shaft 53a of the transmission mechanism 53 and the input shaft 54a of the planting drive case 54. A continuously variable transmission device 55 is installed. The transmission device 55 includes a pair of continuously variable transmission pulleys 56, 5 between the output shaft 53a and the transmission shaft 55a.
These pulleys 56 and 57 are stretched by a belt 58 through the pulley 7, and are driven in the forward and reverse directions by a forward and reverse motor 59, which is a variable speed planting motor connected to one of the pulleys 56.
The gear change is performed by steplessly changing the pitch diameter of the gear, and the gear change output is transmitted to the input shaft 54a via the transmission shaft 60. The driving force input to the input shaft 54a is transmitted to a pair of bevel gears 61 and a planting clutch 62.
is transmitted to the input shaft 63 via
The driving force is generated by the chain transmission mechanism 64 and the horizontal drive shaft 65.
It is also configured to be transmitted to each of the planting claw drive shafts 38 via the chain transmission mechanism 66 of each planting case 20.

By the way, as shown in FIG. 7, the planting control circuit 67 that controls the planting speed includes an accelerator position sensor 68 that detects the mid-speed and high-speed positions of the accelerator of the engine 2, and an accelerator position sensor 68 that detects the high-speed position during planting. a travel shift position sensor 69 for detecting the lowering of the planting section 15; a travel-on detection switch 71 for detecting the on state of the travel clutch; The motor 59 is equipped with a deceleration value setter 72 that appropriately sets the planting speed, that is, the deceleration width of the rotational speed of the rotary case 21 according to the high-speed work conditions.
The control circuit 67 is connected to the motor 59 for a certain period of time until the deceleration value based on the setting device 72 is reached when at least one of the accelerator and the running speed is medium or high speed at the start of planting. The planting speed is slowed down, and after a certain period of time has elapsed, the planting speed is returned to a normal normal speed state.
The control circuit 67 also includes an accelerator output mechanism 75.
is connected to the accelerator driver 76 and to the travel transmission mechanism 77 through the travel transmission driver 78, and when the accelerator is in a medium speed or high speed state at the start of travel, or when the travel speed by the auxiliary transmission mechanism 52 is in a high speed state, each mechanism At steps 75 and 77, the vehicle is decelerated to a low speed state for a certain period of time and then returned to a desired medium or high speed state.

The present embodiment is constructed as described above, and by continuously rotating the rotary case 21 in one direction at a constant speed in the longitudinal direction of the machine centering on the planting claw drive shaft 38, each gear 39, 41, 42, the claw case shaft 45 rotates at an inconstant speed, and shifts the planting claw 17 to the seedling-taking position in front of the seedling-taking port 37, and shifts the planting claw 17 to the planting position while entering the rice field. , one seedling is planted by rotating the rotary case 21 half a turn.

Therefore, during the current work, the accelerator position sensor 68 detects the medium/high speed state of the accelerator, and the high speed state of the planting travel speed by the auxiliary transmission mechanism 52 is detected by the travel shift position sensor 69. When the clutch pedal 32 is turned on, if the accelerator is in a medium or high speed state, it will last for a certain period of time (approximately 30
seconds) After operating the accelerator at a low speed, raise the accelerator to the desired medium/high speed state, and if the planting traveling speed by the auxiliary transmission mechanism 52 is in the high state, after operating the accelerator at a low speed for a certain period of time (approximately 30 seconds). The aircraft reaches the desired high speed state and eliminates the sudden start of the aircraft.

During these driving operations, when the lifting lever 30 is lowered to lower the planting bracket 15, the lowering switch 70 is first turned on, and then the lowering switch 70 is turned on, and the lowering switch 70 is turned on. The deceleration value is read from the setter 72, and the motor 59 is driven forward or reverse accordingly to set the input to the planting section 15 at a low speed. At the time of starting planting when the planting part 15 is lowered and the planting clutch 62 is also turned on, the planting part 1
5 starts driving at a low speed, and after a certain period of time (approximately 30 seconds) has elapsed, drives the motor 59 to a position where the normal constant speed state is maintained to increase the planting drive speed. be. As a result, the inconvenience of applying an impact force from static to rapid motion to the planting claws 17 immediately after starting the planting work can be avoided, and the planting work can be started smoothly and favorably.

In the above-mentioned embodiment, an example of deceleration was shown at the start of traveling or at the start of planting work, but it is also possible to reduce speed while traveling or from high speed to low speed when stopping traveling or when planting work is completed.
A configuration may also be adopted in which the planting drive speed is reduced from a high speed to a low speed to similarly prevent sudden stops in traveling and planting.

"Effects of the Invention" As is clear from the above embodiments, the present invention allows the planting case 20 of the planting section 15 to support the rotary case 21 having a plurality of planting claws 17, and the rotational movement of the rotary case 21 In the structure in which seedling planting work is performed using each planting claw 17,
A planting transmission mechanism section 53 that changes the speed of the planting section 15
An auxiliary transmission mechanism 55 is interposed at the rear of the output side, and the auxiliary transmission mechanism 5
5, the planting section 15
Immediately before descending to start planting, the auxiliary transmission mechanism 55 is set to low speed to drive the planting claws 17 at a lower speed than usual, and after some time has elapsed from the start of planting, it returns to the normal low speed state. By returning the driving speed of the planting claw 17 to It has remarkable effects such as being able to start the planting work optimally, smoothly and favorably while traveling at high speed.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the planting drive unit, 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 rotary case, and Fig. 5 is a side view of the rotary case. 6 is an explanatory diagram of the gear section in the rotary case, FIG. 7 is a control circuit diagram, and FIG. 8 is a flowchart of the same. 15... Planting section, 17... Planting nail, 20... Planting case, 21... Rotary case, 53... Planting transmission mechanism section, 55... Auxiliary transmission mechanism.

Claims (1)

[Scope of utility model registration request] In a structure in which a rotary case having a plurality of planting claws is supported in a planting case of the planting part, and seedling planting work is performed by each planting claw by rotational movement of the rotary case, A rice transplanter, characterized in that an auxiliary transmission mechanism is interposed on the output side rear of a planting transmission mechanism section that changes speed, and the auxiliary transmission mechanism is interlocked with the work start operation of the planting section. attached device.