JPH0418336Y2 - - 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, a rotary case that rotates at a constant speed in one direction is provided, and planting claws are arranged symmetrically around the rotational axis of the rotary case. technology has been developed.

"Problems to be solved by the invention" In the above-mentioned conventional technology, the planting claw trajectory could be easily raised or lowered by shifting the rotational phase of the claw case with respect to the rotation of the rotary case. However, in order to change the planting posture due to changing the spacing between plants, as well as to change the planting claw trajectory in response to the viscosity of the seedling pine, plant height, etc., it is necessary to perform work such as replacing the rotary case with a case with different specifications.
Since it is not possible to easily change the planting claw trajectory, there are problems such as it is not easy to obtain the desired planting trajectory (static trajectory) and it is not easy to improve the planting function.

``Means for Solving the Problems'' However, the present invention is a device in which a planting claw is attached via a claw case to a rotary case that rotates at a constant speed in one direction. A gear train is disposed inside the rotary case, and the pawl case is selectively interlocked and connected to one of the eccentric gear trains having different amounts of eccentricity.

``Function'' Therefore, by switching the eccentric gear train interlocked with the claw case, it is possible to easily obtain a planting claw trajectory that is appropriate for changing the planting posture due to changing the spacing, seedling pine properties, plant height, etc. Compared to this, the planting locus of the planting claw can be easily changed, and the planting function can be easily improved.

"Embodiments" Examples of the present invention will be described below in detail based on the drawings. Fig. 1 is a plan view of the planting section, Fig. 2 is a side view of the riding rice transplanter, and Fig. 3 is the same plan view. 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 a rear wheel 8 for running in paddy fields is supported at the rear end portion of the transmission case 7. 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
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 ring 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 FIG. 5, the two planting claws 17 provided on the rotary case 21 via the claw cases 22, 22, 17 are moved alternately, and two seedlings are planted by the two planting claws 17, 17 in one rotation of the rotary case 21.

Next, a planting claw drive shaft 38 is rotatably supported at the rear end of the planting case 20, and the rotary cases 21, 21 are symmetrically fixed to both ends of the drive shaft 38, and each of the front and left and right side parts is fixed. attached frame 38,
40 are connected to the planting case 20, and each frame 3
9 and 40 are connected in a rectangular frame shape in plan view,
A bearing case 41 is attached to the rotary cases 21, 21 arranged on both sides of the planting case 20 in the center of the planting section 15.
41 are arranged opposite to each other, and the middle of the bearing case 41 is supported by a support shaft 42 inside the planting frame 40 on the side. And rotary case 21 and bearing case 4
A nail case shaft 43 is installed between the two nail case shafts 43, two nail cases 22, 22 are provided on the same nail case shaft 43, and a plurality of planting nails 17 are arranged in parallel in a multi-connected type, and one rotary Four planting claws 17 in two rows, each set of two, are attached to the case 21.

Also, a seedling platform 1 from which seedlings are taken out using the planting claws 17.
A side planting frame 40 is extended in the longitudinal direction of the machine body by passing below the seedling take-out plate 36 at the lower end of the slope, and a planting depth adjustment shaft 44 is provided in the planting case 40. Planting depth adjustment link 3
5 to support the rear part of the float 34 so that the planting depth can be adjusted freely, and a planting depth adjustment lever 45 is connected to the planting depth adjustment shaft 44.
A lever guide plate 46 is attached to the front part of the planting frame 39 via the planting case 20.

Furthermore, as shown in FIGS. 1, 6 to 9,
A sprocket 48 for suspending a planting pawl drive chain 47 is freely rotatably supported in the middle of the drive shaft 38, and the sprocket 48 is operatively connected to the drive shaft 38 via a safety clutch 49.

In addition, two sets of eccentric gear trains 5 with the same number of teeth and the same outer diameter
0,51 are installed inside the rotary case 21,
The claw case 22 is selectively coupled to either of the eccentric gear trains 50, 51 having different eccentric amounts via the claw case shaft 43, and the sun gears 52, 53 are connected to the planting claw drive shaft 38. are fitted loosely, and the sun gears 52 and 53 are fixed to the planting case 20 through the phase adjustment lever 59 so as to be able to freely adjust the phase, and idle gears 54 and 55 and planetary gears 56 and 56 having the same number of teeth as the sun gears 52 and 53 are installed. 57
Equipped with Idle gears 54 and 55 are connected to the intermediate shaft 58, and planetary gears 56 and 57 are connected to the claw case shaft 43 fixed to the claw case 22.
are pivotally supported inside the rotary case 21, and each of the gears 52 to 57 is supported by each of the shafts 38, 4.
3, 58, and sun gear 5
2 and 53 are constantly engaged with planetary gears 56 and 57 via idle gears 54 and 55,
The sun gears 52 and 53 are fixedly supported on the planting case 20, and are connected to the rotary case 2 via the planting claw drive shaft 38.
1 is rotated at a constant speed, and the planting claws 17, 17 at both ends of the rotary case 21 are alternately moved to the seedling take-out port 37 at the lower end of the slope of the seedling platform 16. 52,5
4, 56 or 53, 55, 57, the claw case shaft 43 is rotated at a non-uniform speed, and the rotation of the claw case shaft 43 is faster than the rotation of the rotary case 21 from after the seedlings are cut on the seedling stand 16 to the field. The rotation of the claw case shaft 43 is made faster than the rotation of the rotary case 21 from after seedlings are planted on the rice field to the seedling take-out port 37, and the rotary case 21 rotates faster than the rotary case 21 in the vicinity of the seedling take-out port 37 and in the vicinity of the rice field planting part. rotation and the rotation of the claw case shaft 43 are made approximately equal, and the drive shaft 38 centered on the rotary case 21 is positioned within a circular shape in side view formed by the planting locus of the planting claws 17.

Further, one end of the camshaft 61 is rotatably fixed to the rotary case 21 via a position adjustment lever 60, and the camshaft 61 is loosely fitted to the claw case shaft 43.
The cam shaft 61 is connected via a push arm 63 to a push rod 62 that penetrates through the middle and is connected to the push-out claw 17a for forced planting. The push rod 62 is advanced, and the seedlings sandwiched between the planting claws 17 are pushed out into the soil by the pushing claws 17a.

Furthermore, the planetary gears 56 and 57 are loosely supported on the claw case shaft 43, and each gear 56,
A clutch body 65 is engaged and pivotally supported on the pawl case shaft 43 between 57 and 57 via a spline 64, one end of a clutch hawk 66 is engaged with the clutch body 65, and the other end of the clutch hawk 66 is connected to the clutch hawk shaft 6.
7 to connect and support each planetary gear 5.
The clutch body 65 is selectively engaged with the clutch pieces 67, 68 of 6, 57, and each gear 56, 57 is interlocked and connected to the pawl case shaft 43 via the clutch body 65, and the gears 56, 57 are interlocked with each other. color 6
9 are fitted loosely, and the spacing between the gears 56 and 57 is kept constant.

In addition, one end side of the pair of switching links 70, 71 is connected to the clutch hawk shaft 67 on both end sides of the rotary case 21,
67, and the other ends of the links 70, 71 are removably fixed to the rotary case 21 with thumbscrews 72. When the clutch body 65 is engaged with one of the planetary gears 56, 57, the link 70 , 71 are fixedly supported on the rotary case 21.

Then, as shown in Fig. 8, each gear 52, 54, 5
The eccentric amount B of the eccentric gear train 51 formed by each gear 53, 55, 57 is made larger than the eccentric amount A of the eccentric gear train 50 formed by 6.
As shown in FIG. 9, by rotating the claw case shaft 43 through a gear train 50 with a small eccentricity A, a standard planting locus I shown by a dashed line can be obtained, and a gear train 51 with a large eccentricity B can be obtained. By rotating the claw case shaft 43 through the , it is possible to obtain the planting trajectory shown by the three-dot chain line, and it is possible to obtain the planting trajectory shown by the three-dot chain line. When increasing rice planting, the planting claws 17 are changed with a larger planting trajectory than the standard, and the rice planting work is performed.

In addition, in the above embodiment, one planting locus B was made larger than the standard, but the eccentricity B of the gear train 51
By setting 0 to zero, the trajectory C shown in the two-dot chain line in FIG. A unit clutch action can be obtained when the planting claw 17 is displaced in conjunction with the clutch body 65, and by providing a gear train with zero eccentricity, the clutch body 65 can be easily used as a unit clutch. I can do it. Furthermore, the clutch body 65 is switched at the upper stop position of the planting claw 17, which is the position where the loci A, B, and C intersect (coinciding), so that the rotation timing of all the gears 52 to 57 is always the same. The clutch body 65 can be switched in the state in which the clutch body 65 is in the closed state.

"Effects of the Invention" As is clear from the above embodiments, the present invention has the same number of teeth and the same outer diameter in a device in which the planting claw 17 is attached via the claw case 22 to the rotary case 21 that rotates at a constant speed in one direction. a plurality of eccentric gear trains 50,
51 is installed inside the rotary case 21, and the pawl case 22 is selectively interlocked and connected to either of the eccentric gear trains 50, 51 having different eccentricity amounts A and B. By switching the eccentric gear trains 50 and 51 that are linked to each other, it is possible to easily obtain planting claw trajectories A and B that are appropriate for changes in planting posture caused by changing plant spacing, seedling pine properties, plant height, etc. In comparison, it is possible to easily change the planting loci A and B of the planting claws 17, and to easily improve the planting function.

[Brief explanation of the drawing]

Fig. 1 is an enlarged plan view of a planting section showing an 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 side view of the planting section, and Fig. 5 is an enlarged plan view of a planting section showing an embodiment of the present invention. 6 is a sectional side view, FIGS. 7 and 8 are partial explanatory views of the rotary case, and FIG. 9 is a side explanatory view showing the planting locus. 17... Planting nail, 21... Rotary case, 2
2...Claw case, 50, 51...Eccentric gear train.

Claims (1)

[Scope of utility model registration request] In a device in which a planting claw is attached via a claw case to a rotary case that rotates at a constant speed in one direction, a plurality of eccentric gear trains having the same number of teeth and the same outer diameter are installed inside the rotary case, and the amount of eccentricity is varied. A planting device for a rice transplanter, characterized in that the claw case is selectively coupled to one of the eccentric gear trains.