JP2815852B2 - Rice transplanter seedling planting equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION [0001] The present invention relates to a rice transplanter,
The present invention relates to an improvement of a rotary seedling plant for dividing seedlings one by one from a seedling mat on a seedling mounting table and then planting the seedlings in a field scene. 2. Description of the Related Art Conventionally, a seedling plant of this kind is constructed by, as described in Japanese Patent Publication No. 49-27762, for example, by attaching a base end of a planting body having a split claw of a seedling to a machine body. Side, the tip of a crank fixed to a claw shaft that is rotationally driven by an engine is pivotally connected to the middle part of the planting body, and the planting body is divided by the rotation of the crank. By configuring the tip of the claw to swing up and down so as to draw a motion trajectory of a long elliptical closed loop in a vertical direction in a state where the rice transplanter has stopped traveling,
The seedlings were not damaged when the seedlings were split from the seedling mat, and the split nails quickly escaped from the seedlings after planting the seedlings in the field scene, thereby stabilizing the planting posture of the seedlings. However, this method has a problem that vibration is large due to the vertical swing and the planting speed is slow. Therefore, in order to reduce the vibration and improve the planting speed, at each of the left and right ends of the rotating body case,
A so-called rotary seedling plant equipped with a split claw-mounted plant is disclosed, for example, in Japanese Patent Publication Nos. Sho 17-17806, Sho 49-17807 and Sho 56-2121.
No. 2 has proposed this. [0004] However, in the conventional rotary seedling plant, both of the planting bodies are long in the vertical direction in a state where the tips of the split claws in each of the planting bodies stop running of the rice transplanter. A mechanism for moving so as to draw an elliptical closed-loop movement trajectory is required, and conventionally, this movement is configured to be performed by a crank mechanism or a cam mechanism. Due to the large torque fluctuation, there is a problem that the planting posture of the seedling with respect to the field scene is unstable and the vibration cannot be sufficiently reduced. SUMMARY OF THE INVENTION The present invention has been made to solve the above problem and to provide a rotary seedling planting apparatus which is capable of planting seedlings in a field scene and taking out the seedlings from the seedling table well. It is an issue. [0006] In order to achieve this technical object, the present invention provides a transmission case in a body of a rice transplanter, in which a rotating shaft transmitted from a power source is pivotally supported. A rotating body case is attached to a protruding end of the rotating shaft from the transmission case, and at both ends of the rotating body case, a planting shaft extending parallel to the rotating shaft at an equal position from the rotating shaft is rotatably supported. A chopstick-shaped split claw is attached to the planting rod fixed to each of the planting shafts so that the split claw extends in the direction of the seedling mounting table to be attached to the machine body, while the rotating body case has the same structure. In a seedling plant comprising a gear train for transmitting the rotation of a rotating body case to the two planting shafts as rotation, the gears in the gear train are unequal speed transmitting unequal speed rotation to both planting shafts. A gear train, while the gear train The center of rotation of the outer circumference of each variable speed gear
The minimum radius where these radii are minimized is each unequal
A state arranged in the center of rotation and the minimum radius portion and aligned with one another is a line connecting the shaped or substantially straight line in and the non-uniform speed gear located in seedling mounting table side from the rotation center of speed gear of the rotational phase position Occasionally, the field after the leading end of the split nail in the seedling placing stand side planting rod of and the both planting rod in a posture chopsticks like split nail is inclined obliquely downward in both planting rod is passed through the seedling mounting table Each of the planting rods is positioned at a position before entering the surface.
Attach to the mounting shaft . ". BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a transmission case of a rice transplanter according to an embodiment of the present invention.
A boss body 2 projects horizontally and horizontally, and inside the boss body 2, a power of an engine (not shown) mounted on the body of the rice transplanter is transmitted via a sprocket 3 'and a hollow rotary body is driven to rotate. The shaft 3 is inserted, and the boss 2
An oval-shaped, hollow rotator case 4 is fitted to the protruding end of the rotator case, and the rotator case 4 is configured to be rotated rightward as shown by an arrow A in a side view. . A central shaft 5 is rotatably inserted into the hollow rotary shaft 3 with respect to the rotary shaft 3. A protruding end of the central shaft 5 into the rotary body case 4 has a rotary body 5. Case 4
, A non-rotating sun gear 6 is fitted. At the inner end of the transmission case 1 of the center shaft 5 to which the sun gear 6 is attached, the sun gear 6 is locked in a non-rotational state with respect to the transmission case 1 and the phase of the sun gear 6 with respect to the transmission case 1 is 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 center shaft 5 is provided, and a pin 9 integrated with the sleeve 8 is engaged with a groove 10 formed in the center shaft 5 while the sleeve 8 is By connecting the protruding lever 11 to a screw shaft 12 provided outside the transmission case 1, the center shaft 5 and thus the sun gear 6 are held in a non-rotating state with respect to the transmission case 1 while the center shaft 5 is held. The groove 8 is inclined with respect to the axis of the central shaft 5, and the sleeve 8 slides by turning the screw shaft 12, whereby the phase position of the sun gear 6 with respect to the transmission case 1 is adjusted. It is configured to be. At the left and right ends in the rotating body case 4, that is, at locations at an equal distance R from the center of the rotating shaft 3, the supporting shaft 13 is provided.
Is non-rotatably supported with respect to the rotating body case 4 in parallel with the center shaft 5, a hollow planting shaft 14 is rotatably fitted on the supporting shaft 13, and one end of the planting shaft 14 is rotated. The planting rod 15 protruding outside the body case 4 and having a straight chopstick-shaped linear dividing claw 16 at the protruding end thereof is attached to the planting rod 1.
5 so that the chopstick-shaped split claw 16 in 5 extends toward the seedling mounting table 17. On the other hand, an intermediate shaft 18 is rotatably supported in the rotary body case 4 at a position intermediate between the center shaft 5 and the planting shaft 14 so as to be rotatable in parallel with both shafts. An intermediate gear 19 constantly meshing with the sun gear 6 is rotatably provided. A planetary gear 20 that always meshes with the intermediate gear 19 on the intermediate shaft 18 is fitted on 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. Are linked so that they make one rotation in the opposite direction. Further, the center (O), (O '), (O ") of the sun gear 6, the intermediate gear 19, and the planetary gear 20 are respectively connected to the shafts 5, 19, 20 of the respective gears 6, 19, 20. The eccentric gear is configured to be eccentric by an appropriate dimension (e) with respect to the rotation centers of the rotations 18 and 14. When the rotating body case 4 revolves rightward as indicated by an arrow A by its rotating shaft 3, the transmission case 1 The intermediate gear 19 meshing with the non-rotatable sun gear 6 rotates rightward in the direction of the arrow B by the same rotation angle as the rotation of the rotating body 4 with the revolution of the rotating body 4. Since the planting shaft 14 interlocking via 20 rotates by the rotation of the intermediate gear 19 in the left direction of the arrow C, that is, in the direction opposite to the revolving direction of the rotating body case 4, the planting rod 15 attached to the planting shaft 14 , Facing the seedling table 17 Remains, will be pivotal movement about the axis of rotation 3, dividing the planting rod 15 pawl 16
Represents a closed-loop motion trajectory when the rice transplanter is stopped running. During the revolving movement, when the side facing the seedling mounting table 17 is descended from the top to the bottom, the seedling is divided by a single plant from the seedling mat on the seedling mounting table 17 at the tip of the split claw 16. The plant is planted in the field scene 22 near the lower lower limit, and then rises from the field scene 22. Therefore, the sun gear 6, the intermediate gear 19, and the planetary gear 20 are connected to the centers (O), (O '), and (O ") of the gears 6, 19, 20 by the shafts 5, 18, 14 in each of them. In addition to the configuration of an eccentric gear eccentric by an appropriate dimension (e) with respect to the center of rotation of the eccentric gear, as shown in FIG.
4 during rotation of the rotating body case 4
The radius is smallest from the rotational center of the outer peripheral of the sun gear 6 and the intermediate gear 19 and the planetary gears 20 in
Minimum radius portion line 6a connecting the rotation center and the minimum radius portion in position to and each sun gear 6 and the intermediate gear 19 and the planetary gear 20 to the seedling mounting table 17 side than the rotation center of each of the gears comprising, 19a , 20a is straight or rotational phase position where a state arranged in a substantially straight line with each other when the (rotational phase position shown in FIG. 5), the two planting rod 15
And the tip of the split claw 16 of the planting rod 15 of the both planting rods 15 on the side of the seedling mounting table 17 is the seedling mounting table. 17 so as to be located at a position before entering the field scene 22 after the passage. [0014] Thus, rotation of the left direction of both planting shaft 14 with the revolution of the right direction of the rotating body case 4, times at each eccentric type gear 6,19,20 in that during one rotation
In addition to rotating unequally to increase or decrease the rotation speed of the rotating body case 4 due to the difference in radius from the center of rotation, the planting rod is rotated with respect to the revolution of the rotating body case 4. As shown in FIG. 5, the time when the rotation speed of the left 15 in the left direction becomes the slowest is as shown in FIG.
This is the time when the split claw 16 of the planting rod 15 on the 7 side is located at a position after passing through the seedling mounting table 17 and before entering the field scene 22. That is, the rotation speed of the two planting rods 15 in the left direction (the direction opposite to the revolution of the rotating body case 4) is determined by the fact that the split claws 16 of the planting rods 15
Before and after the phase position, which is located before entering the field scene 22 after passing through, the seedling mounting table of the planting rod 15
The inclination angle of the split claw 16 with respect to the horizontal line of the 17-side planting rod 15 is gradually changed so as to be small before and after the phase position so as to increase after that. As a result, when the traveling of the rice transplanter is stopped, the closed loop of the movement trajectory 21 of the distal end of the split claw 16 of both planting rods 15 is long in the vertical direction as shown by the two-dot chain line in FIGS. In addition to the elliptical shape, the split claw 16 of the planting rod 15 of the both planting rods 15 on the side of the seedling mounting table 17, when passing through the seedling mounting table 17, When approaching so as to be at a right angle and entering the field scene 22, the vehicle approaches so as to be in an upright position with respect to the field scene 22. The base end of the planting rod 15 and the split claw 1
The tip portion 6 is configured to be shifted by an appropriate dimension (S) in the axial direction of the rotating shaft 3 so as not to collide with each other in the plan view of FIG. In order to increase or decrease the amount of seedlings taken out of the seedling mat by the split claws 16 of the planting rod 15, the sun gear 6 and thus the central shaft 5
Is displaced by the phase adjusting mechanism 7. That is, as shown in FIG. 4, the phase position of the sun gear 6 and thus the center axis 5 is changed from the position (D) to the position (E) by an angle (θ ′) in the direction opposite to the rotation direction of the rotating body case 4. ), The planting rod 15 with the split claw 16
The posture changes upward by an angle (θ ′) as shown by the dotted line in FIG. 5, and the movement trajectory of the split claw 16 shifts from the movement trajectory 21 before displacement to 21 ′, so that the removal amount of the seedling decreases. In addition, the phase position of the sun gear 6 and thus the center axis 5 is shifted from the position (D) to the position (F) by the angle (θ ″) in the same direction as the rotation direction of the rotator case 4 as shown in FIG. When displaced, the planting rod 1 with the split claws 16
5 is a downward angle (θ ″) as shown by a chain line in FIG.
Since the posture changes and the movement trajectory of the split claw 16 shifts from the movement trajectory 21 before the displacement to 21 ″, the removal amount of the seedlings is increased. Can be freely adjusted by adjusting the phase of
Of course, the phase adjustment of the center shaft 5 can be performed even during the planting operation in which the rotating body case 4 is rotating. According to the present invention, there is provided a rotary seedling-planting apparatus, wherein each gear in the gear train is constituted as an unequal-speed gear for transmitting unequal-speed rotation to both planting shafts. The radius of the outer periphery of each variable speed gear of the gear train from the center of rotation is
A minimum radius portion that minimizes is attached to each of the variable speed gears.
Gears located on the seedling platform side of the rotation center
As when the rotational center and the rotational phase position of the line connecting the minimum radius portion is in a state arranged in a straight line or a substantially straight line with each other, in a posture chopsticks like dividing claws in the two planting rod is inclined obliquely downwards in the And, so that the tip of the split claw of the planting rod on the seedling mounting side of the both planting rods is located at a site before entering the field scene after passing through the seedling mounting table, the two planting rods, It is characterized in that it is attached to each of the planting shafts . , Which allows said
Rotation of both planting shafts in opposite directions due to rotation of rotating body case
Is the radius difference between each variable speed gear during one rotation.
Speed is faster or slower than the rotating speed of the rotating case.
In addition to rotating at a non-uniform speed,
Both planted rods rotate in the opposite direction to the rotation of the rolling body case
The time when the speed is the slowest is the seedling mounting side of both planted rods.
After the split claw on the planting rod of
It is time to locate at a site before entering the surface. That is, the rotating body case of the two planted rods and
Is the rotation speed in the opposite direction.
After the split claw on the side planting rod has passed the seedling
Across the phase position located in the part before entering the scene,
Earlier, before and after that
The inclination of the split claw with respect to the horizontal line
The oblique angle is, before and after the phase position,
The posture should be smaller so that it becomes larger after that.
Since the following changes, in the state where the rice transplanter has stopped running
Closed loop of the motion trajectory at the tip of the split claw of both planted rods
Has a long oval shape in the vertical direction, plus both plants
The split claw on the planting rod on the seedling mounting side of the
When passing through the stand,
When approaching the field scene by approaching at a right angle
Approach to a standing posture with respect to the field scene
It will be. As a result, according to the present invention ,. Compared to the conventional rotary seedling, the variable speed gear
Tip of split claw on both planted rods only by meshing rotation
Let us draw the trajectory of the elliptical closed loop that is long in the vertical direction.
Therefore, the torque fluctuation when the two planting rods rotate at an irregular speed is reduced, and the planting posture of the seedling with respect to the field scene can be stabilized, and the vibration can be significantly reduced, and , Durability can be improved. . Division of the planting rod on the seedling mounting side of both planting rods
When the nails pass through the seedling platform,
Approach the seedling mounting surface at a right angle and proceed to the field scene.
When entering, you will be standing upright against the field scene
Therefore, when the seedlings are taken out from the seedling mounting table, damage to the seedlings can be reliably reduced, and the reliability of planting the seedlings in the field scene can be improved. It has the effect of saying.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a seedling plant 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 of FIG. 1; FIG. 4 is a sectional view taken along line IV-IV of FIG. 3; FIG. 5 is a diagram showing a rotation state of an eccentric gear. DESCRIPTION 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 Dividing claw 17 Seedling stand 19 Intermediate gear 20 Planetary gear 21 Motion trajectory 22 Field scenes 6a, 19a, 20a Line connecting the center of rotation and the minimum radius of each gear

Claims (1)

(57) [Claims] A rotating shaft (5) , which is transmitted from a power source, is supported on a transmission case (1) of the body of the rice transplanter.
The rotating body case (4) is attached to the protruding end of the transmission case (1 ) of (5) , and the rotating shaft (5) is provided at both ends of the rotating body case (4) at the same position from the rotating shaft (5).
A planting shaft (14) extending parallel to (5) is rotatably supported, and a chopstick-shaped split claw (16) is attached to a planting rod (15) fixed to each of the planting shafts (14). Split claw
(16) While a mounting so as to extend in the direction of the mounting rather Naeno board (17) to the machine body, the rotary body case (4) in the two planting shaft the rotation of the rotating body case (4)
(14) A seedling plant comprising a gear train arranged to transmit rotation as a rotation, wherein each gear in the gear train is transmitted to a non-constant speed gear (6) for transmitting a non-constant speed rotation to both planting shafts. ), (20) , while the variable speed gears (6), (1)
9), radius from the center of rotation of the outer circumference in (20)
The minimum radius of each gear is its variable speed gear
(6), (19) and (20), each of which is located closer to the seedling mounting table (17) than the center of rotation, and each of the variable speed gears (6) and (1).
9), (20) in a line connecting the said minimum radius portion and its center of rotation (6a), (19a), when the rotational phase position where the state arranged in (20a) is straight or substantially straight line with each other, the planting rod the two chopsticks like split nail in planting rod (15) (16) and in a posture inclined obliquely downward said seedling mounting table of both planting rod (15) (17) side (1
The tip of the split nail (16) in 5) said seedling mounting base (1
After passing through 7) , the two planting rods (15) are positioned so as to be located at a position before entering the field scene (22).
A seedling plant for a rice transplanter, wherein the seedling plant is attached to each of the planting shafts (14) .