JP2644472B2 - Rice transplanter seedling planting equipment - Google Patents

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, when the rice transplanter is stopped running, the seedlings are not damaged when the seedlings are divided from the seedling mat, and the seedlings are cultivated by swinging up and down so as to draw a long elliptical closed loop trajectory in the vertical direction. After planting on the surface, the split nails quickly escaped from the seedlings to stabilize 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 increase the planting speed, a so-called rotary seedling planting device in which a plurality of planting bodies with split claws are attached to the outer periphery of the rotating body case has been proposed, for example, These are proposed in Japanese Patent Publication No. 49-17806 and Japanese Patent Publication No. Sho 49-17807.

[0004]

However, in this conventional rotary seedling plant, each planted body is closed by an elliptical closed loop that is long in the vertical direction when the tip of the split claw in each of the plantlets stops running of the rice transplanter. It is necessary to have a mechanism for oscillating to draw the trajectory of the movement.
This motion is configured to be performed by a crank mechanism or a cam mechanism. However, with this crank mechanism, the posture of planting seedlings in a field scene is unstable due to large torque fluctuation, and vibration is reduced. Cannot be sufficiently achieved, and the durability is low.

[0005] In addition, in this conventional rotary seedling plant, the motion trajectory at the tip of the split claw is changed to the uppermost end portion of the motion trajectory which shifts from upward movement to downward movement,
Since the straight line connecting the lowermost portion that shifts from the downward movement to the upward movement is inclined in the direction of the seedling mounting table with respect to the field scene, the muddy distance of the field scene by the split claw is large. Then, since a long groove is dug by the split claw in the field scene, not only floating seedlings are easily generated,
There was also a problem that the seedlings would not take root.

Further, Japanese Utility Model Publication No. 56-21 as prior art
No. 212 discloses that in the rotary seedling plant, each split claw is swung only at the lower portion of the closed-loop motion locus to make the lower half of the closed-loop motion locus sharp. Therefore, the mud-scraping distance in the field scene by the split claw is reduced, but the cam mechanism is used to swing the split claw only at the lower part of the closed-loop motion trajectory. To
The torque fluctuation is large, the planting posture of the seedling with respect to the field scene is unstable, the vibration cannot be sufficiently reduced, and the durability is low.

That is, according to the prior art, the generation of floating seedlings is reduced and the survival of seedlings is improved in a state where the planting posture of the seedlings is stabilized, vibration is reduced, and durability is improved. And could not be achieved. An object of the present invention is to solve these problems in the rotary seedling plant at a glance.

[0008]

SUMMARY OF THE INVENTION In order to achieve this technical object, the present invention provides a transmission case in a body of a rice transplanter, which supports a rotating shaft transmitted from a power source in a transmission case. A rotating body case is attached to a protruding end from the transmission case, and planting shafts are supported on both left and right ends of the rotating body case in parallel with the rotating shaft. In a seedling plant comprising a planting rod provided with a split claw extending in the direction of, a non-uniform rotation is transmitted to each of the planting shafts in the rotating body case with the rotation of the rotating body case. A gear train is provided, and the two planting rods are necked only by the gear train so that the tip of the split claw in the planting rod stops the traveling of the rice transplanter and draws a motion trajectory of an elliptical closed loop that is long in the vertical direction. Like swinging On the other hand, when the rotating body case is in the planting posture in which the split claw of one of the planting rods enters the field scene substantially deepest, the straight line connecting the tips of the split claws of both the planting rods is It was configured to be substantially parallel to the straight line connecting the planting axes. "

[0009]

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 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 attached to the center shaft 5.
By connecting a lever 11 protruding from the sleeve 8 to a screw shaft 12 provided on the outside of the transmission case 1 while engaging the groove 10 formed in the transmission case 1, the center shaft 5 and thus the sun gear 6 can be connected to the transmission case. 1, while the groove 10 in the central shaft 5 is inclined with respect to the axis of the central shaft 5, and the sleeve 8 is slid by turning the screw shaft 12. It is configured to adjust the phase position of the sun gear 6 with respect to the transmission case 1 by sliding.

At the left and right ends in the rotating body case 4, that is, at two places on the circumference of a radius R centered on the center of the rotating shaft 3, the support shaft 13 is parallel to the center shaft 5 and the rotating body case 4 , A hollow planting shaft 14 is rotatably fitted to the supporting shaft 13, and one end of the planting shaft 14 protrudes outside the rotating body case 4, and the projecting end The planting rod 15 provided with the dividing claw 16 is attached so that the dividing claw 16 of the planting rod 15 faces the seedling mounting table 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, as shown by a two-dot chain line in FIGS.
Will be drawn.

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 rotation speed of the rotating body case 4 becomes faster or slower due to the diameter difference of 20, the leftward rotation of the planting shaft 14 becomes slower than the revolution of the rotating body case 4. At the time when the planting rod 15 descends so as to approach the field scene 22 as shown in FIG.
4 is set to correspond to the time when the rotation of the planting rod 4 in the left direction is advanced so as to approach the upper limit of the rising of the planting rod 15, so that each planting rod 15 can be set in the field scene 22.
When descending so as to approach, the robot rotates to the left behind the revolution of the rotating body case 4 and changes its posture downward,
When approaching the ascending upper limit, the rotator case 4 advances to the left more than the revolution of the rotating body case 4 and rotates freely to change the posture upward. Therefore, when the rice transplanter stops running, The closed loop of the movement trajectory 21 of the tip has an elliptical shape elongated in the vertical direction as shown by the two-dot chain line in FIGS. 1 and 5.

In this case, by setting the eccentric directions of the sun gear 6, the intermediate gear 19 and the planetary gear 20 as appropriate, the rotating body case 4 can be moved so that the split claw 16 of one of the planting rods 15 can be used in a field scene. 22 is a straight line 16a connecting between the tips of the split claws 16 of the both planting rods 15 when the planting posture is to enter the deepest into the sub-unit 22.
However, it is configured so as to be substantially parallel to a straight line 14a connecting between the planting shafts 14.

With such a configuration, the elliptical motion trajectory 21 which is long in the vertical direction is formed by
As compared with the case described in Japanese Patent Publication No. 17806 and Japanese Patent Publication No. 49-17807, the rotating shaft 5 which is the center of rotation of the rotating body case 4 is attached to the seedling mounting table 1.
7 and the distance (L) of mud scraping in the field scene by each split claw 16 can be shortened.

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 phase position of the sun gear 6 and thus the center shaft 5 is displaced by the phase adjusting mechanism 7. 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 hence the center axis 5 is displaced from the position (D) to the position (F) by an angle (θ ″) in the same direction as the rotation direction of the rotating body case 4 as shown in FIG. The posture of the planting rod 15 with the 16 changes its angle (θ ″) downward as shown by the dashed line in FIG.
Is shifted from the motion trajectory 21 before displacement to 21 ″, the take-out amount of the seedling is increased, and the take-out amount of the seedling can be freely adjusted by adjusting the phase of the central axis 5, 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.

[0018]

As described above, according to the present invention, in a rotary seedling plant, both planted rods provided with split claws can be used only by the gear train provided in the rotating body. Since the tip is caused to swing in such a manner that the tip draws a locus of an elliptical closed loop that is long in the vertical direction, compared to the conventional rotary seedling plant, torque fluctuation when the planting case is swung is small. In other words, it is possible to stabilize the posture of planting the seedlings in the field scene, significantly reduce vibration, and improve durability.

Further, according to the present invention, when the rotating body case is in a planting posture in which the split claw of one of the planting rods enters the field scene substantially deepest, a straight line connecting between the tips of the split claws of the both planting rods is provided. However, by being configured so as to be substantially parallel to the straight line connecting the two planting axes, the rotating shaft that is the center of rotation of the rotating body case can be close to the seedling mounting table, and the field scene by each split claw Because the mud scraping distance can be shortened, floating seedlings are generated in a rotary seedling plant in a state where the planting posture of the seedlings is stabilized, vibration is reduced, and durability is improved. , The survival of the seedlings can be greatly improved, and the overall length of the rice transplanter can be shortened to reduce the size.

[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]

 DESCRIPTION OF SYMBOLS 1 Transmission case 3 Rotating shaft 4 Rotating body case 5 Center axis 6 Sun gear 14 Planting shaft 14a Straight line connecting planting shafts 15 Planting rod 16 Dividing claw 16a Straight line connecting tip of dividing claw 19 Intermediate gear 20 Planetary gear 21 Motion locus 22 Field scene

Claims (1)

(57) [Claims] 1. A rotary case for power transmission from a power source is supported on a transmission case of a body of a rice transplanter, and a rotary case is attached to a protruding end of the rotary shaft from the transmission case. A seedling comprising a planting shaft supported on both left and right ends of the case in parallel with the rotation shaft, and a planting rod having split claws extending in the direction of the seedling mounting table to be attached to the body is attached to both planting shafts. In the apparatus, a gear train is provided in the rotating body case so as to transmit unequal speed rotation to each of the planting shafts with the rotation of the rotating body case, and the two planting rods are provided only by the gear train. While the tip of the split claw in the planting rod is configured to be swung and swung so as to draw a motion trajectory of a long elliptical closed loop in the vertical direction in a state where the rice transplanter stops running, the rotating body case has One of the planting rods When the split claw is in the planting posture of entering the field scene substantially deepest, the straight line connecting the tips of the split claws in both planting rods is substantially parallel to the straight line connecting the two planting shafts. A seedling transplanter for a rice transplanter, characterized in that: