JP2911414B2 - 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 large torque fluctuations, the attitude of planting seedlings in the field scene is unstable, and it is not possible to sufficiently reduce vibration, and there is a problem that durability is low. [0005] In addition, in this conventional rotary seedling plant, the split claw of one planting rod is configured not to overlap the base end of the other planting rod in a side view. Since the axial distance from the center of rotation of the rotating body case to the center of rotation of both planting rods must be increased, there is a problem that the seedling plant is increased in size and weight is increased. An object of the present invention is to solve all of these problems in the rotary seedling plant at once. 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, wherein a transmission shaft from a power source is supported by a transmission case. 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. In a seedling planting apparatus, in which a planting rod having a split claw extending in the direction of the seedling mounting table to be attached to the machine body is attached to both of the planting shafts, in the rotating body case, the rotating body case rotates. A gear train adapted to transmit unequal speed rotation to the two planting shafts is provided, and the two planting rods are moved only by the gear train in a state in which the tip of the dividing claw in the planting rod stops traveling of the rice transplanter. Ellipse vertically long While it is configured to rotate at an irregular speed so as to draw a motion trajectory of a closed loop, the distance between the axes from the rotating shaft to both planting shafts is set such that the tip end of the split claw in one planting rod is the other in side view. Is set so as to overlap and pass through the base end of the planting rod. " 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 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. 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. More specifically, a sleeve 8 is slidably fitted on the center shaft 5, and a pin 9 integral with the sleeve 8 is engaged with a groove 10 formed in the center shaft 5, 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. The support shafts 13 are located at both left and right ends in the rotator case 4, that is, at locations at an equal distance R from the center of the rotation shaft 3.
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 that protrudes outside the body case 4 and has a dividing claw 16 at the protruding end thereof, is attached to the dividing claw 16 of the planting rod 15.
Is attached to 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
Represents a closed-loop motion trajectory 21 as shown by a two-dot chain line in FIG. 1 in a state where the rice transplanter stops running. 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. ,
At a diameter difference of 20, the rotating body case 4 rotates at an irregular speed so as to be faster or slower than the rotation speed thereof. Therefore, the time when the rotation of the planting shaft 14 to the left is delayed with respect to the revolution of the rotating body case 4 is the time when the planting rod 15 descends so as to approach the field scene 22. By setting the time at which the rotation in the direction becomes faster corresponds to the time at which the planting rod 15 rises so as to approach the upper limit, the planting rods 15
When descending so as to approach the field scene 22, the rotating body case 4 rotates to the left to delay the revolving motion of the rotating body case 4 and changes its attitude to a lower position. In the state where the traveling of the rice transplanter is stopped, the motion trajectory 21 of the tip of the splitting claw 16 of each planting rod 15 in the state where the traveling of the rice transplanter is stopped.
Has a vertically elongated elliptical shape as shown by a two-dot chain line in FIG. In this case, according to the present invention, in addition to the above-described configuration, the distance R between the rotating shaft 3 which is the center of rotation of the rotating body case 4 and the two planting shafts 14 is determined by the two planting rods 15. The tip of the split claw 16 of one of the planting rods 15 is viewed from the side (FIG. 1).
5 is set so as to overlap with and pass through the base end portion. 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
Is changed, and the movement trajectory of the split claw 16 shifts from the movement trajectory 21 before displacement to 21 ′, so that the amount of seedlings taken out decreases, and the phase position of the sun gear 6 and thus the center axis 5 is changed. As shown in FIG. 4, when the rotating body case 4 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, the posture of the planting rod 15 with the split claw 16 changes. Since the movement trajectory of the split claw 16 shifts from the movement trajectory 21 before displacement to 21 ″, the removal amount of the seedling increases, so that the removal amount of the seedling can be freely adjusted by adjusting the phase of the central shaft 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. As described above, according to the present invention, in the rotary seedling plant, the planting rod with split claws can be formed only by the gear train provided in the rotating body. Since the tip is rotated at an irregular speed so as to draw a locus of an elliptical closed loop that is long in the vertical direction, compared with the conventional rotary seedling plant, the case where the planting case is rotated at an irregular speed is used. As a result, the fluctuation of the torque is reduced, the attitude of planting the seedling with respect to the field scene can be stabilized, the vibration can be greatly reduced, and the durability can be improved. Further, according to the present invention, the distance between the shafts from the rotating shaft to the two planting shafts is such that the tip of the split claw of one planting rod overlaps the base end of the other planting rod in side view. The distance between the axes is set such that the distal end of the split claw in one planting rod does not overlap with the base end of the other planting rod in a side view as in the related art. Therefore, it is possible to reduce the size and weight of the seedling-planting device, since the length can be reduced as compared with the case of the above-described configuration.

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; [Description of Signs] 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 scene

Claims (1)

(57) [Claims] A rotating shaft transmitted from a power source is supported on a transmission case of the body of the rice transplanter, and a rotating case is attached to a protruding end of the rotating shaft from the transmission case. is the rotation at a position equal to the said rotary shaft
A seedling plant comprising a planting shaft extending parallel to the shaft rotatably supported, and a planting rod having a split claw extending in the direction of the seedling mounting table attached to the machine body attached to both planting shafts; In the rotator case, a gear train that transmits unequal-speed rotation to the two planting shafts with the rotation of the rotator case is provided, and the two planting rods are used only by this gear train. In the state where the tip of the split claw stops traveling of the rice transplanter, the split claw is configured to rotate unequally so as to draw an elliptical closed-loop motion trajectory that is long in the vertical direction, while the axis from the rotation axis to the both planting axes Distance between
A seedling planting apparatus for a rice transplanter, characterized in that a tip portion of a split claw of one planting rod is set so as to overlap with and pass through a base end portion of the other planting rod in a side view.