JPH10136734A - Rice transplanter seedling planting equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mount a planting rod 15 with a split claw 16 on both ends of a rotating body case 4 rotated by a rotating shaft 3 with a planting shaft 14, and to rotate the rotating body case 4. The present invention aims to improve the durability of a rotary seedling plant that incorporates gears 6, 19, and 20 that are transmitted to both planting shafts, improve seedling planting in a field scene, and take out seedlings from a seedling mounting table, and reduce the size. Each of the gears (6, 19, 20) is formed as a non-constant speed gear, and both of the planting rods (15) are mounted on a planting shaft (14) with a minimum radius from the rotation center of each of the gears during one rotation of the rotating body case. The portion is located on the seedling mounting table side, and the dividing claws are inclined obliquely downward in a rotational phase in which the lines 6a, 19a, and 20a connecting the rotation center of each gear and the minimum radius portion are substantially aligned with each other. The split claws are mounted so that the tips of the split claws pass through the seedling mounting table 17 and before entering the field scene 22, and the gears 6, 19, and 20 are configured as a single gear train. .

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 plant, the two planted bodies are each closed by an elliptical closed loop that is long in the vertical direction in a state where the tips of the split claws in each of them stop running of the rice transplanter. It is necessary to have a mechanism for moving so as to draw the motion trajectory.Conventionally, this movement is configured to be performed by a crank mechanism or a cam mechanism. Because of the large size, there is a problem that the planting posture of the seedlings with respect to the field scene is unstable and that 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]

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 rotator case is attached to a protruding end from the transmission case. At both ends of the rotator case, a planting shaft extending parallel to the rotation shaft at an equal position from the rotation 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. In the seedling planting apparatus provided with a gear train adapted to transmit the rotation of the two planting shafts as rotation, the respective gears in the gear train are configured as unequal speed gears for transmitting unequal speed rotation to both the planting shafts. On the other hand, the two planting rods are With respect to the planting shaft, the minimum radius portion from the rotation center of each variable speed gear in the gear train during one rotation of the rotating body case is located on the seedling mounting table side, and each variable speed gear is At a rotational phase position where lines connecting the rotation center and the minimum radius portion are aligned with each other in a straight line or in a substantially straight line, the chopstick-shaped split claws of the two planted rods are inclined obliquely downward and the two planted rods are inclined. Of these, the tip of the split claw of the planting rod on the side of the seedling table is attached so as to be located at a position after passing through the seedling table and before entering the field scene, and the gear train is an example of a gear train. It is characterized by the above. "

[0007]

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, 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 central shaft 5
In turn, the sun gear 6 is held in a non-rotation state with respect 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 is turned by turning the screw shaft 12. 8 slides, and by this sliding, the phase position of the sun gear 6 with respect to the transmission case 1 is adjusted.

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. In this case, the sun gear 6, the intermediate gear 19 and the planetary gear 20 constitute an example gear train.

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
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 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 eccentric gear eccentrically eccentric by an appropriate dimension (e) with respect to the rotation center of, as shown in FIG.
4, the minimum radius of the sun gear 6, the intermediate gear 19, and the planetary gear 20 from the center of rotation during one rotation of the rotator case 4 is located on the seedling mounting table 17 side, and each sun gear 6 And intermediate gear 19 and planetary gear 20
6a, 19 connecting the rotation center and the minimum radius portion in
At the rotational phase position (a rotational phase position shown in FIG. 5) in which the a and 20a are aligned with each other in a straight line or a substantially straight line, the chopstick-shaped split claws 16 of the both planted rods 15 are inclined obliquely downward with respect to the horizontal line. And the tip of the split claw 16 of the planting rod 15 on the seedling mounting table 17 side of the both planting rods 15 before passing into the field scene 22 after passing through the seedling mounting table 17. It is mounted so that it is located at

Thus, the rotation of the planting shaft 14 to the left along with the revolving of the rotating body case 4 to the right is caused by the rotation of the eccentric gears 6, 19, and 20 due to the diameter difference during one rotation. In addition to rotating at an irregular speed so as to be faster or slower than the rotation speed of the body case 4, the rotation speed of the planting rod 15 in the left direction with respect to the revolution of the rotating body case 4 is the most. As shown in FIG. 5, the portion where the split claw 16 of the planting rod 15 on the side of the seedling mounting table 17 of the both planting rods 15 passes through the seedling mounting table 17 before entering the field scene 22 is delayed. It is time to be located.

That is, the rotation speed of the planting rod 15 in the left direction is determined by a part of the planting rod 15 after the split claw 16 passes through the seedling mounting table 17 and before entering the field scene 22 as described above. Before and after the phase position that is located, the inclination angle of the split claw 16 with respect to the horizontal line of the planting rod 15 is
With the phase position in between, the posture is sequentially changed so as to be smaller before that and larger after that.

With this arrangement, the closed loop of the movement trajectory 21 of the tip of the split claw 16 of each planting rod 15 when the rice transplanter stops running is elongated vertically as shown by the two-dot chain line in FIGS. In addition to being elliptical,
The split claw 16 of the planting rod 15 on the seedling mounting table 17 side of the two planting rods 15 approaches the seedling mounting surface of the seedling mounting table 17 when passing through the seedling mounting table 17, When entering the field scene 22, the field scene 22
It will approach so that it may be in an upright posture.

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.

[0019]

According to the present invention, there is provided a rotary seedling-planting apparatus, wherein each gear in the gear train is formed as a non-constant-speed gear for transmitting non-constant-speed rotation to both planting shafts. During the rotation of the rotating body case, the minimum radius portion from the rotation center of each unequal-speed gear in the gear train is positioned on the seedling mounting side with respect to the planting shaft on each of the rods. At a rotational phase position where lines connecting the rotation center of the constant velocity gear and the minimum radius portion are aligned with each other in a straight line or a substantially straight line, the chopstick-shaped split claws of the both planted rods are inclined obliquely downward and Of the two planting rods, the tip of the split claw of the planting rod on the seedling mounting side is mounted so as to be located at a position before passing into the field scene after passing through the seedling mounting base. In this way, it is installed in the rotating body case Only by the gear train, the planting rod with the split claw can draw a locus of an elliptical closed loop in which the tip of the split claw in the planting rod is long in the vertical direction, and the planting rod on the seedling mounting side of both the planting rods. When passing through the seedling table, the divided claw is in a posture close to a right angle with the seedling mounting surface in the seedling table, and when entering the field scene, it is in a posture close to the state of standing up to the field scene. Since the posture can be sequentially changed as described above, the torque fluctuation when the planting rod is rotated at a non-uniform speed is reduced as compared with the conventional rotary seedling plant, and the planting posture of the seedling with respect to the field scene is reduced. Stabilization can be achieved, vibration can be greatly reduced, and durability can be improved.
When taking out the seedlings from the seedling mounting table, it is possible to reliably reduce damage to the seedlings and to improve the certainty of planting the seedlings in the field scene.

In addition, according to the present invention, since the gear train provided in the rotator case is formed as a single gear train, the rotator case can be made thinner. It also has the effect of achieving weight reduction and, consequently, reduction in size and weight of the seedling plant.

[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 15 Planting rod 16 Split claw 17 Seedling stand 19 Intermediate gear 20 Planetary gear 21 Motion locus 22 Field scene 6a, 19a, 20a Rotation in each gear Line connecting center and minimum radius

Claims (1)

[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. At both ends of the case, a planting shaft extending parallel to the rotating shaft is rotatably supported at the same position from the rotating shaft, and a chopstick-shaped split claw is attached to a planting rod fixed to each of the planting shafts. A gear train that is attached to the rotating body case so as to transmit the rotation of the rotating body case to the two planting shafts as rotation while the split claw is attached so as to extend in the direction of the seedling mounting table to be attached to the body. In the seedling plant apparatus provided, each of the gears in the gear train is configured as an unequal-speed gear that transmits unequal-speed rotation to both the planting shafts, while the two planting rods are respectively provided with respect to the planting shafts. During one rotation of the rotating body case The minimum radius portion from the rotation center of each variable speed gear in the gear train is located on the seedling mounting side, and lines connecting the rotation center of each variable speed gear and the minimum radius portion are linear or substantially linear with each other. At the rotation phase position where the two planting rods are aligned, the chopstick-shaped split claws of the two planted rods are inclined obliquely downward, and the tip of the split claw of the planted rod on the seedling mounting table side of the two planted rods is the seedling mounting. A seedling planting apparatus for a rice transplanter, wherein the seedling is arranged so as to be located at a position before entering a field scene after passing through a table, and the gear train is configured as an example gear train.