JPH07110174B2 - Rice planting equipment for rice transplanters - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a rotary seedling planting device for splitting seedlings from a seedling mat on a seedling mounting table in a rice transplanter and then planting the seedlings in a field. is there.

[0002]

2. Description of the Related Art Conventionally, a seedling planting apparatus of this type has a base end of a planting body having a split seedling claw at its tip, which is agitated toward the machine body, as described in Japanese Patent Publication No. 49-27662. While connecting via a link, the middle part of the plant is pivotally attached to the tip of a crank fixed to a claw shaft that is rotationally driven by the engine, and the rotation of the crank causes the plant to move to the tip of the split claw. However, when the rice transplanter is stopped running, by vertically swinging so as to draw a motion locus of a long elliptical closed loop in the vertical direction,
When the seedlings were split from the seedling mat, the seedlings were not damaged, and after the seedlings were planted in the field, the split nails quickly escaped from the seedlings to stabilize the seedling planting posture.

However, this product has a problem that it vibrates greatly due to its vertical swing and the planting speed is slow. Therefore, in order to reduce the vibration and improve the planting speed, a so-called rotary seedling planting device in which a plurality of plant bodies with split claws are mounted on the outer peripheral portion of the rotor body case is disclosed in, for example, Japanese Patent Publication No. 49-17806, JP-B-49-17807 and JP-B-56-21212.
It is proposed by Japanese Patent Publication No.

[0004]

However, in this conventional rotary type seedling planting device, each planting body has an elliptical closed loop which is long in the up-down direction when the tip of the split claw in each planting plant stops running the rice transplanter. It is necessary to have a mechanism for performing movement so as to draw the movement locus of the above. Conventionally, this movement is configured to be performed by a crank mechanism or a cam mechanism. However, this crank mechanism causes torque fluctuation. Since it is large, the posture of planting the seedlings in the field is unstable, vibration cannot be sufficiently reduced, and the durability is low.

In addition, in this conventional rotary type seedling planting apparatus, a part of the movement locus at the tip of each split claw of the rice planting machine in a state where the rice planting machine is stopped is moved to the center of the descending locus. Since it is located on a vertical line passing through the lower end of the rice seedling, the distance from the seedling stand to the center of the rotating body case becomes long, which causes a problem that the total length of the rice transplanter increases. The present invention has a technical object to solve all of these problems in the rotary type seedling planting device at once.

[0006]

In order to achieve this technical object, the present invention provides a "transmission case in the body of a rice transplanter in which a rotary shaft to which power is transmitted from a power source is rotatably supported. A rotating body case is attached to the protruding end from the transmission case, and a planting shaft is axially supported in parallel with the rotating shaft in the rotating body case at equal parts on a circumference centered on the rotating shaft.
In each of the planting shafts, a seedling planting device comprising a planting rod provided with a split claw extending in the direction of the seedling mount attached to the machine body, in the rotating body case, as the rotating body case rotates. A gear train adapted to transmit non-uniform speed rotation is provided to each of the planting shafts, and the planting rods are moved up and down only by this gear train in a state where the tip of the split claw in the planting rod stops the rice transplanter running. The movement locus of the elliptical closed loop which is long in the up-down direction when the rice transplanter is stopped while being configured to swing and rotate so as to draw the movement locus of the elliptical closed loop which is long in the direction. The substantially central portion of the above was configured to enter the underside of the seedling placing table by an appropriate distance from the vertical line passing through the lower end of the seedling placing table. It is something.

[0007]

Embodiments of the present invention will now be described with reference to the drawings. In the drawings, reference numeral 1 is a transmission case in the body of a rice transplanter, and a boss body 2 horizontally protrudes laterally from a side surface of the transmission case 1. Inside the boss body 2, the power of an engine (not shown) mounted on the body of the rice transplanter is sprocket 3 '.
A hollow rotary shaft 3 which is transmitted through the rotary drive and is driven to rotate is inserted, and an oval-shaped and hollow rotary body case 4 is fitted to a protruding end of the rotary shaft 3 from the boss body 2. Is
The rotating body case 4 is configured to rotate in the right direction of arrow A in a side view.

A central shaft 5 is rotatably inserted in the hollow rotary shaft 3 with respect to the rotary shaft 3, and a rotary body is provided at a protruding end of the central shaft 5 into the rotary body case 4. Case 4
On the other hand, a non-rotating sun gear 6 is fitted. At the inner end of the transmission case 1 of the central shaft 5 to which the sun gear 6 is attached, the sun gear 6 is locked in a non-rotating state with respect to the transmission case 1, and the phase of the sun gear 6 with respect to the transmission case 1 is fixed. A phase adjusting mechanism 7 for adjusting the position is provided.
The phase adjusting mechanism 7 is configured as follows, for example. That is, a sleeve 8 slidably fitted on the central shaft 5 is provided, and a pin 9 integral with the sleeve 8 is attached to the central shaft 5.
The lever 11 projecting from the sleeve 8 while being engaged with the groove 10 formed in the shaft 8 is connected to the screw shaft 12 provided on the outer side of the transmission case 1, so that the central shaft 5 and thus the sun gear 6 are transmitted to the transmission case. While keeping the non-rotating state with respect to 1, the groove 10 in the central shaft 5 is inclined with respect to the axis of the central shaft 5, and the sleeve 8 slides when the screw shaft 12 is rotated. It is configured to adjust the phase position of the sun gear 6 with respect to the transmission case 1 by sliding.

At both left and right ends of the rotary body case 4, that is, at two locations on the circumference of a radius R centered on the center of the rotary shaft 3, the support shaft 13 is parallel to the central shaft 5 and the rotary body case 4 is provided. A non-rotatable shaft, a hollow planting shaft 14 is rotatably fitted onto the support shaft 13, and one end of the planting shaft 14 is projected to the outside of the rotating body case 4 to project its end. The planting rod 15 provided with the split claw 16 is attached so that the split claw 16 of the planting rod 15 faces the seedling stand 17.

On the other hand, in the rotating body case 4, an intermediate shaft 18 is rotatably supported in parallel with both shafts at an intermediate position between the central shaft 5 and the planting shaft 14, and on the intermediate shaft 18. An intermediate gear 19 that constantly meshes with the sun gear 6 is rotatably provided. Then, a planetary gear 20 that constantly meshes with an intermediate gear 19 on the intermediate shaft 18 is fitted onto the planting shaft 14 in the rotating body case 4, and the planting shaft 14 is rotated by one rotation of the rotating body case 4. Interlockingly connect so as to make one rotation.

Further, regarding the sun gear 6, the intermediate gear 19 and the planetary gear 20, the centers (O), (O ') and (O ") of the respective gears 6, 19 and 20 have axes 5 and 5, respectively. The eccentric gear is configured to be eccentric by an appropriate dimension (e) with respect to the center of rotation of 18 and 14. When the rotating body case 4 revolves in the right direction of the arrow A by the rotating shaft 3, the rotating body case 4 is rotated relative to the transmission case 1. The intermediate gear 19 meshing with the non-rotatable sun gear 6 rotates in the right direction of the arrow B by the same rotation angle as the revolution of the rotating body 4 as the rotor 4 revolves. The rotation of the intermediate gear 19 causes the planting shaft 14 that interlocks via 20 to rotate in the left direction of the arrow C, that is, in the direction opposite to the revolving direction of the rotating body case 4, so that the planting rod 15 attached to the planting shaft 14 is , Facing the seedling stand 17 Remains, will be pivotal movement about the axis of rotation 3, dividing the planting rod 15 pawl 16
Is a closed-loop motion locus 2 as indicated by a chain double-dashed line in FIGS. 1 and 5 when the rice transplanter is stopped.
I will draw 1.

During this turning movement, when the side facing the seedling mounting table 17 is lowered from the top to the bottom, the seedling mat is split from the seedling mat on the seedling mounting table 17 by the tip of the dividing claw 16 thereof. , And is planted in the field scene 22 in the vicinity of the lower limit of the descending, and then rises above the field scene 22. By the way, the sun gear 6 and the intermediate gear 19
In addition, the planetary gear 20 is arranged such that the centers (O), (O ′) and (O ″) of the respective gears 6, 19 and 20 are appropriately dimensioned (e) with respect to the rotation centers of the shafts 5, 18 and 14 in each of them. ), The rotation of the planting shaft 14 to the left along with the revolution of the rotating body case 4 to the right rotates to the eccentric gears 6, 19 during one rotation. ，
Since the diameter difference of 20 makes the rotation speed of the rotating body case 4 faster or slower, the leftward rotation of the planting shaft 14 becomes slower than the revolution of the rotating body case 4. As shown in FIG. 5, when the planting shaft 14 descends so as to approach the field scene 22 of the planting rod 15, as shown in FIG.
Each of the planting rods 15 descends so as to approach the farm scene 22 by setting so that the time when the leftward rotation of the plant becomes faster corresponds to the time when the planting rods 15 rise so as to approach the upper limit of the rise of the planting rods 15. When rotating, it rotates to the left behind the revolution of the rotating body case 4 and turns its own posture to change its posture downward. When approaching the upper limit of the rise, it moves to the left more than the revolution of the rotating body case 4 and rotates on its own. Since the posture is changed upward, each planting rod 1
The closed loop of the movement locus 21 of the tip of the split claw 16 of No. 5 has an elongated elliptical shape in the vertical direction as shown by the chain double-dashed line in FIGS. 1 and 5.

In this case, by appropriately setting the eccentric direction, the eccentric dimension (e), etc. in the sun gear 6, the intermediate gear 19 and the planetary gear 20, the rice planter can be stopped in the stopped state. Of the elliptical motion locus 21 which is long in the vertical direction at the tip of the split claw 16, the substantially central portion 21c in the descending locus from the uppermost end portion 21a to the lowermost end portion 21b is the lower end of the seedling mounting table 17. It is configured so as to enter the lower side of the seedling stand 17 by an appropriate distance (L) from the vertical line 17a passing through.

With this structure, the rotating shaft 5 which is the center of rotation of the rotating body case 4 can be brought closer to the seedling stand 17 by the entering distance (L). The amount of seedlings taken out from the seedling mat by the split claws 16 of the planting rod 15 is increased or decreased by displacing the phase position of the sun gear 6 and thus of the central axis 5 by the phase adjusting mechanism 7. That is, the phase position of the sun gear 6 and thus of the central axis 5 is displaced from position (D) to position (E) by an angle (θ ') in the direction opposite to the direction of rotation of the rotor case 4, as shown in FIG. Then, the planting rod 15 with the split claw 16 is angled upward (θ ') as shown by the dotted line in FIG.
The posture of the split claw 16 changes, and the movement locus of the split claw 16 deviates from the movement locus 21 before displacement to 21 '. Therefore, the amount of seedlings taken out decreases, and the phase position of the sun gear 6 and thus the central axis 5 is changed. Position (D) as shown in FIG.
From the position (F) to the position (F) in the same direction as the rotation direction of the rotating body case 4 by the angle (θ ″), the planting rod 15 with the split claw 16 moves downwardly by the angle (θ ″) as shown by the alternate long and short dash line in FIG. ) Since the posture changes and the movement locus of the split claw 16 deviates from the movement locus 21 before displacement to 21 ″, the amount of seedlings taken out is increased. It is possible to freely adjust the phase of the central shaft 5 by adjusting the phase of the rotary shaft 5. Also, the phase of the central shaft 5 can be adjusted during the planting operation in which the rotary case 4 is rotating.

Further, the number of the planting rods 15 is not limited to two in the above-mentioned embodiment, and it is also possible to arbitrarily make a plurality of three or more equally divided ones in the circumferential direction. And a mounting base of the planting rod 15 to the planting shaft 14,
If the portion to which the split claw 16 is attached or the tip of the split claw 16 is displaced by an appropriate dimension (S) in the axial direction of the rotary shaft 3 in the plan view of FIG. 2, the tip of the split claw 16 and the planting rod 15 The collision interference with the base can be avoided.

[0016]

As described above, according to the present invention, in the rotary type seedling planting device, the planting rod with the split claws is moved up and down only by the gear train provided in the rotating body. Since it is intended to perform a swinging motion so as to draw a locus of a long elliptical closed loop in the direction, compared with the conventional rotary type seedling planting device, the torque fluctuation when swinging the planting case becomes small, and the field The planting posture of the seedlings on the surface can be stabilized, vibration can be significantly reduced, and durability can be improved.

Moreover, according to the present invention, of the vertical elliptical motion loci at the tips of the split claws in a state where the rice transplanter is stopped, the substantially central portion of the descending motion locus is set on the seedling table. By arranging so as to enter the underside of the seedling mounting table by an appropriate distance from the vertical line passing through the lower end, the rotation axis that is the center of rotation of the rotating body case can be brought closer to the seedling mounting table. , Has the effect of shortening the overall length of the rice transplanter.

[Brief description of drawings]

FIG. 1 is a front view of a seedling planting device according to an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is an enlarged sectional view taken along line III-III in FIG.

FIG. 4 is a sectional view taken along line IV-IV of FIG.

FIG. 5 is a diagram showing a rotating state of an eccentric gear.

[Explanation of symbols]

 1 transmission case 3 rotating shaft 4 rotating body case 5 center shaft 6 sun gear 14 planting shaft 15 planting rod 16 split claw 17 seedling mount 17a vertical line passing through the lower end of seedling mount 19 intermediate gear 20 planetary gear 21 motion trajectory 21a motion Uppermost part of locus 21b Lowermost part of motion locus 21c Near center part of descending locus 22 Field scene

Claims (1)

[Claims] 1. A rotary case to which power is transmitted from a power source is rotatably supported by a transmission case of a rice transplanter machine, and the rotary case is attached to a protruding end of the rotary shaft from the transmission case. In the case, planting shafts are axially supported in parallel with the rotary shaft at equal parts on the circumference centered on the rotary shaft, and extend in the direction of the seedling table to be attached to the machine body on each planting shaft. In a seedling planting device comprising a planting rod equipped with a split claw,
In the rotating body case, a gear train is provided which transmits non-constant speed rotation to each of the planting shafts in accordance with the rotation of the rotating body case, and each of the planting rods is provided only by this gear train. The tip of the split claw in the run of the rice transplanter
In the state where the rice transplanter is stopped , it is configured so as to swing and swing so as to draw a movement locus of an elliptical closed loop that is long in the up-down direction, while the movement of the elliptical closed loop that is long in the up-down direction when the rice transplanter is stopped. A seedling plant of a rice transplanter characterized in that a substantially central part of the descending locus of the locus is configured to enter the underside of the seedling placing table by an appropriate distance from a vertical line passing through the lower end of the seedling placing table. apparatus.