JPH09103156A - Seedling transplanter for rice transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve both transplanting properties and durability in a rotating type seedling transplanter prepared by installing transplanting rods having divided pawls through transplanting shafts to both ends of a rotor case rotated with a rotating shaft. SOLUTION: This seedling transplanter for a rice transplanter is obtained by composing a motional locus of tips of divided pawls 16 in both transplanting rods 15 so as to form an elliptical shape long in the vertical directions only with gear train mechanisms installed in a rotor case and, on the other hand, extending the divided pawls 16 in both the transplanting rods 15 into a state so as to overlap and pass the tips at the divided pawls by the base end in the transplanting rods 15 when viewed from the side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD 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.

[0002]

2. Description of the Related Art Conventionally, a seedling plant of this kind has been proposed in which, for example, as described in Japanese Patent Publication No. 49-27762, the base end of a plant having a split claw of a seedling at its tip is agitated toward the fuselage. While being connected via a link, a tip of a crank fixed to a midway portion of the planting body on a claw shaft driven and rotated by an engine is pivotally connected. However, by configuring the rice transplanter to oscillate up and down so as to draw an elliptical closed loop motion trajectory that is long in the up and down direction in a stopped state,
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 this conventional rotary type seedling planting device, both planted plants are closed in an elliptical closed loop which is long in the up and down direction when the tip of the split claw in each plant stops the traveling of 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. Because of the large size, the posture of planting the seedlings in the field is unstable, and the vibration cannot be sufficiently reduced.

Therefore, in the conventional rotary type seedling planting device, the length of the split claws in both planting bodies is shortened to avoid instability of the seedling planting posture due to the torque fluctuation. As a result, the height from the field scene to the rotating body case becomes low, and the frequency with which mud adheres to the rotating body case and the frequency with which the rotating body case comes into contact with the field scene increase. Therefore, the torque fluctuation is large. In addition, there was a problem that durability was low.

[0006] The present invention has a technical object to solve these problems in the rotary type seedling planting device all at once.

[0007]

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. The rotating body case is attached to the projecting end from the transmission case, and at both ends of the rotating body case, planting shafts are axially supported in parallel with the rotary shaft at the same position from the rotary shaft, and both planting shafts are provided. A seedling planting device comprising a planting rod equipped with a split claw extending in the direction of a seedling mount attached to the machine body, wherein a seedling planting device is provided in the rotary body case and is not attached to each planting shaft as the rotary body case rotates. A gear train adapted to transmit a constant speed rotation is provided, and each of the planting rods is closed only by this gear train, and an elliptical closed loop which is long in the up-down direction in a state where the tip of the split claw on the planting rod stops the rice transplanter running. I will draw the movement trajectory of The split claws on both of the planting rods pass through the split claws while overlapping with the base end of the planting rod in a side view. Extend."
It was configured to say.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing 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 and hollow rotator case 4 is fitted to the protruding end of the rotator case, and the rotator case 4 is configured to be rotated in the right direction of the 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
, 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 central shaft 5 is provided, and a pin 9 integral with the sleeve 8 is engaged with a groove 10 formed in the central shaft 5, while By connecting the protruding lever 11 to the screw shaft 12 provided outside the transmission case 1, the central shaft 5 and thus the sun gear 6 are held in a non-rotating state with respect to the transmission case 1, while the central shaft 5 The groove 10 is inclined with respect to the axis of the central shaft 5, and the sleeve 8 slides by the turning operation of the screw shaft 12. By this sliding, the phase position of the sun gear 6 with respect to the transmission case 1 is adjusted. Is configured to.

At the left and right ends of the rotating body case 4, that is, at a position having an equal distance R from the center of the rotating shaft 3, the support shaft 13 is provided.
Is rotatably supported in parallel with the central axis 5 with respect to the rotating body case 4, a hollow planting shaft 14 is rotatably fitted to the spindle 13, and one end of the planting shaft 14 is rotated. The planting rod 15 which projects to the outside of the body case 4 and has the split claw 16 at the projecting end is provided with the split claw 16 in the planting rod 15.
Are attached so that they face the seedling stand 17.

On the other hand, an intermediate shaft 18 is rotatably supported in the rotating body case 4 at a position 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 rotate once.

Further, the center (O), (O '), (O ") of the sun gear 6, the intermediate gear 19, and the planetary gear 20 are connected to the shaft 5, 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
In the state where the traveling of the rice transplanter is stopped, a closed-loop motion trajectory 21 is drawn as shown by a two-dot chain line in FIGS. 1 and 5.

During the revolving movement, when the side facing the seedling mounting table 17 is lowered from above to below, the seedlings are split 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. By the way, the sun gear 6 and the intermediate gear 19
And the center (O), (O '), (O ") of each of the gears 6, 19, 20 is appropriately dimensioned (e) with respect to the rotation center of the shaft 5, 18, 14 in each of them. ), The rotation of the planting shaft 14 in the left direction accompanying the revolving of the rotating body case 4 in the right direction causes 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 rotation of the planting shaft 14 to the left 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, the body rotates to the left of the revolution of the rotor case 4 to rotate freely, changing its posture downward, and when approaching the upper limit of the rise, it moves to the left more than the revolution of the rotor 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, in the present invention, in addition to the above construction, the split claws 16 in the two planting rods 15 are provided.
In the side view (FIG. 1), the tip of the split claw 16 is extended to a state where the tip of the split claw 16 overlaps and passes the base end of the other planting rod 15. It should be noted that the base end portion of the planting rod 15 and the tip end portion of the split claw 16 are appropriately dimensioned (S) in the axial direction of the rotary shaft 3 so as not to collide and interfere with each other in the plan view of FIG. It is configured to shift.

In order to increase or decrease the amount of seedlings taken out from the seedling mat by the split claws 16 of the planting rod 15, the phase adjusting mechanism 7 is used to displace the phase position of the sun gear 6 and thus of the central axis 5. Done by. That is, the phase position of the sun gear 6 and thus the center axis 5 is displaced from the position (D) to the position (E) by an angle (θ ′) in a direction opposite to the rotation direction of the rotating body case 4 as shown in FIG. Then, the posture of the planting rod 15 with the split claw 16 changes upward by an angle (θ ′) as shown by a dotted line in FIG. 5, and the motion trajectory of the split claw 16 shifts from the motion trajectory 21 before displacement to 21 ′. , The amount of seedlings taken out will decrease,
When the phase position of the sun gear 6 and thus of the central axis 5 is displaced from the position (D) to the position (F) in the same direction as the rotating direction of the rotating body case 4 by an angle (θ ″) as shown in FIG. As shown by the alternate long and short dash line in FIG. 5, the angled (θ ″) posture of the planting rod 15 with 16 changes downward, and the movement locus of the split claw 16 shifts from the movement locus 21 before displacement to 21 ″. The amount of seedlings taken out can be freely adjusted by adjusting the phase of the central axis 5 as it is said that the amount will increase.
This is possible even during the planting operation in which the rotating body case 4 is rotating.

[0017]

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.

Further, according to the present invention, the split claws on both of the planting rods are extended to such a state that the tip ends of the split claws are overlapped with and pass through the base end portions of the planting rods in a side view. The length of the split claw becomes longer without impairing the stabilization of the planting posture of the seedlings in the field scene, and the height from the field scene to the rotating body case can be increased by this amount, and the rotating body Since the frequency with which mud adheres to the case and the frequency with which the rotating case contacts the field scene can be reliably reduced, there is an effect that durability can be significantly improved in combination with the small torque fluctuation.

[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.

[Explanation of symbols]

 1 Transmission Case 3 Rotating Shaft 4 Rotating Body Case 5 Center Shaft 6 Sun Gear 14 Sun Shaft 14 Planting Shaft 15 Planting Rod 16 Dividing Claw 17 Seedling Stand 19 Intermediate Gear 20 Planetary Gear 21 Motion Track 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. At both ends of the case, planting shafts are axially supported at the same position from the rotary shaft in parallel with the rotary shaft, and both the planting shafts are provided with split claws extending in the direction of the seedling table to be attached to the machine body. In a seedling planting device with a planting rod attached, a gear train is provided in the rotating body case so as to transmit non-constant rotation to each of the planting shafts in accordance with the rotation of the rotating body case. The above-mentioned planting rods are configured so as to swing and rotate so as to draw a movement locus of an elliptical closed loop that is long in the up-down direction when the tip of the dividing claw in the planting rod stops the traveling of the rice transplanter. , On both of the planting rods A seedling planting device for a rice transplanter, wherein the split claw in the split claw is extended to a state in which a tip end of the split claw overlaps with a base end of the planting rod in a side view to pass therethrough.