JPH06253629A - Seedling planter for rice transplanter - Google Patents

Abstract

PURPOSE:To change a motional locus at the tips of dividing pawls of each planting rod into the shape of an elliptical closed loop long in the vertical directions without causing the deterioration in durability and an increase in the vibration in a seedling planter equipped with the plural planting rods having the dividing pawls in one rotating body case. CONSTITUTION:The interior of a rotating body case 4 is equipped with a gear train of gears 6, 19 and 20 so as to transmit nonuniform velocity rotation to each planting shaft 14 following the rotation of the rotating body case 4. On the other hand, raised parts (4a) and (4b) are integrally shaped in parts corresponding to each planting shaft on the both sides of the rotating body case. Ball bearings (4a') and (4b') pivoting both the ends of each planting shaft are provided in each raised part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a rotary seedling planting device for splitting seedlings from a seedling mat on a seedling mounting table in a rice transplanter and then planting the seedlings in a field. is there.

[0002]

2. Description of the Related Art Conventionally, a seedling planting apparatus of this type has a base end of a planting body having a split seedling claw at its tip, which is agitated toward the machine body, as described in Japanese Patent Publication No. 49-27662. While connecting via a link, the middle part of the plant is pivotally attached to the tip of a crank fixed to a claw shaft that is rotationally driven by the engine, and the rotation of the crank causes the plant to move to the tip of the split claw. However, by vertically swinging so as to draw a locus of a long elliptical closed loop in the vertical direction, the seedlings are not damaged when splitting seedlings from the seedling mat and the split claws are planted after the seedlings are planted in the field. It quickly escaped from the plant to stabilize the seedling planting posture.

However, this product has a problem that it vibrates greatly due to its vertical swing and the planting speed is slow. Therefore, in order to reduce the vibration and improve the planting speed, a so-called rotary seedling planting device in which a plurality of plant bodies with split claws are mounted on the outer peripheral portion of the rotor body case is disclosed in, for example, Japanese Patent Publication No. It is proposed by Japanese Patent Publication No. 49-17806 and Japanese Patent Publication No. 49-17807.

[0004]

However, in this conventional rotary type seedling planting device, each planting body moves so that the tip of the split claw in each planting body draws a locus of an elliptical closed loop that is long in the vertical direction. In the past, the crank mechanism was used to perform this movement, but with this crank mechanism, the torque fluctuation is large, so the posture of planting the seedlings in the field scene is unsatisfactory. In addition to being stable, it is not possible to sufficiently reduce vibration, and there is a problem that durability is low.

SUMMARY OF THE INVENTION The present invention has a technical object to solve the above-mentioned problems in the rotary type seedling planting device without increasing the size thereof.

[0006]

In order to achieve this technical object, the present invention is directed to a transmission case in the body of a rice transplanter,
A rotary shaft that is motive power transmitted from a power source is rotatably supported, and a rotary body case is attached to a protruding end of the rotary shaft from a transmission case.
In the rotary body case, planting shafts are axially supported in parallel to the rotary shaft at equal positions on a circumference centered on the rotary shaft, and the planting shafts of the seedling mounts attached to the machine body are attached to the respective planting shafts. In a seedling planting device comprising a planting rod provided with a split claw extending in a direction, a gear that is configured to transmit non-constant rotation to each planting shaft in the rotating body case as the rotating body case rotates. A row is provided, and each of the planting rods is configured to swing and rotate so that the tip of the split claw in the planting rod draws a locus of an elliptical closed loop that is long in the vertical direction.
Protrusions are integrally formed on portions of the left and right side surfaces of the rotating body case corresponding to the planting shafts, and ball bearings that support both ends of the planting shafts are provided in the respective protuberances. I made it a structure to say.

[0007]

Embodiments of the present invention will now be described with reference to the drawings. In the drawings, reference numeral 1 is a transmission case in the body of a rice transplanter, and a boss body 2 horizontally protrudes laterally from a side surface of the transmission case 1. Inside the boss body 2, the power of an engine (not shown) mounted on the body of the rice transplanter is sprocket 3 '.
A hollow rotary shaft 3 which is transmitted through the rotary drive and is driven to rotate is inserted, and an oval-shaped and hollow rotary body case 4 is fitted to a protruding end of the rotary shaft 3 from the boss body 2. Is
The rotating body case 4 is configured to rotate in the right direction of 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, and a rotary body is provided at a protruding end of the central shaft 5 into the rotary body case 4. Case 4
On the other hand, a non-rotating sun gear 6 is fitted. At the inner end of the transmission case 1 of the central shaft 5 to which the sun gear 6 is attached, the sun gear 6 is locked in a non-rotating state with respect to the transmission case 1, and the phase of the sun gear 6 with respect to the transmission case 1 is fixed. 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 attached to the central shaft 5.
The lever 11 protruding from the sleeve 8 while being engaged with the groove 10 formed in the shaft is connected to the screw shaft 12 provided outside the transmission case 1, so that the central shaft 5 and thus the sun gear 6 are transmitted to the transmission case. While keeping the non-rotating state with respect to 1, the groove 10 in the central shaft 5 is inclined with respect to the axis of the central shaft 5, and the sleeve 8 slides when the screw shaft 12 is rotated. It is configured to adjust the phase position of the sun gear 6 with respect to the transmission case 1 by sliding.

At both left and right ends of the rotary body case 4, that is, at two locations on the circumference of a radius R centered on the center of the rotary shaft 3, the support shaft 13 is parallel to the central shaft 5 and the rotary body case 4 is provided. A non-rotatable shaft, a hollow planting shaft 14 is rotatably fitted onto the support shaft 13, and one end of the planting shaft 14 is projected to the outside of the rotating body case 4 to project its end. The planting rod 15 provided with the split claw 16 is attached so that the split claw 16 of the planting rod 15 faces the seedling stand 17.

In this case, the both ends of each of the planting shafts 14 are integrally formed with ridges 4a and 4b at the portions corresponding to the respective planting shafts 14 on the left and right side surfaces of the rotating body case 4, and the respective ridges are formed. Ball bearings 4a 'and 4b' fitted in the portions 4a and 4b rotatably support the rotating body case 4. On the other hand, in the rotating body case 4,
An intermediate shaft 18 is rotatably supported in a position intermediate between the central shaft 5 and the planting shaft 14 in parallel with both shafts, and on the intermediate shaft 18,
An intermediate gear 19 that constantly meshes with the sun gear 6 is rotatably provided.

Then, a planetary gear 20 that is constantly meshed with an intermediate gear 19 on the intermediate shaft 18 is fitted onto the planting shaft 14 in the rotating body case 4 and one rotation of the rotating body case 4 is performed. The planting shaft 14 is interlockingly connected so as to rotate once. In this configuration, when the rotating body case 4 revolves in the right direction of the arrow A by the rotating shaft 3 thereof, the intermediate gear 19 meshing with the sun gear 6 that cannot rotate with respect to the transmission case 1 rotates with the revolution of the rotating body 4. And rotates in the right direction of arrow B by the same rotation angle as that of the revolution. The planting shaft 14 that is interlocked with the intermediate gear 19 via the planetary gear 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. Attached to the rod 15
Will rotate about the rotary shaft 3 while facing the seedling mounting table 17, and the split claws 16 of the planting rod 15 will move as shown by the two-dot chain line in FIGS. 1 and 5. A closed-loop motion locus 21 is drawn.

During this turning movement, when the side facing the seedling mounting table 17 is lowered from the top to the bottom, the seedling mat is split from the seedling mat on the seedling mounting table 17 by the tip of the dividing claw 16 thereof. , Is planted in the field scene 22 in the vicinity of the lower limit of the fall, and thereafter rises above the field scene 22.
Then, the amount of seedlings taken out from the seedling mat by the split claws 16 of the planting rod 15 is increased or decreased by displacing the phase position of the sun gear 6 and thus of the central axis 5 by the phase adjusting mechanism 7. That is, the phase position of the sun gear 6 and thus of the central axis 5 is displaced from position (D) to position (E) by an angle (θ ') in the direction opposite to the direction of rotation of the rotor case 4, as shown in FIG. Then, the posture of the planting rod 15 with the split claw 16 changes upward by the angle (θ ′) as shown by the dotted line in FIG. 5, and the motion locus of the split claw 16 shifts from the motion locus 21 before displacement to 21 ′. The amount of seedlings taken out is reduced, and the phase position of the sun gear 6 and thus the center axis 5 is changed from the position (D) to the position (F) as shown in FIG. Dividing claw 1 when it is displaced in the same direction by an angle (θ ″)
As shown by the alternate long and short dash line in FIG. 5, the planting rod 15 with 6 changes its posture downward by an angle (θ ″), and the movement locus of the split claw 16 shifts from the movement locus 21 before displacement to 21 ″. As the extraction amount increases, the extraction amount of seedlings can be adjusted freely by adjusting the phase of the central axis 5, and of course, the phase adjustment of the central axis 5
This is possible even during the planting operation in which the rotating body case 4 is rotating.

In the sun gear 6, the intermediate gear 19 and the planetary gear 20, the centers (O), (0 ') and (O ") of the gears 6, 19 and 20 have axes 5 and 5 respectively. If the eccentric gear is appropriately decentered by the dimension (e) with respect to the center of rotation of 18 and 14, rotation of the planting shaft 14 in the leftward direction when the rotating body case 4 revolves in the right direction is prevented. , The eccentric gears 6, 19, 20 during one rotation
Since the rotation speed of the rotating body case 4 becomes faster or slower due to the difference in diameter, the rotation of the planting shaft 14 to the left becomes slower than the revolution of the rotating body case 4. However, as shown in FIG. 5, when the planting rod 15 descends so as to approach the field scene 22 so that the rotation of the planting shaft 14 to the left becomes faster, the planting rod 15 approaches the rising upper limit. By setting so as to correspond to the rising time, the planting rods 15 will rotate to the left rather than the revolution of the rotating body case 4 when they descend so as to approach the farm scene 22, and take their postures. When turning downward, when approaching the upper limit of the rise, it will move to the left further than the revolution of the rotating body case 4 and rotate freely and change its posture upward,
Movement locus 2 of the tip of the split claw 16 of each planting rod 15
The closed loop of No. 1 has an elongated elliptical shape in the vertical direction as shown by a chain double-dashed line in FIGS. 1 and 5.

Further, the number of the planting rods 15 is not limited to two in the above-mentioned embodiment, and it is also possible to arbitrarily make a plurality of three or more equally divided ones in the circumferential direction. As shown in FIG.
By appropriately shifting the dimension (S) in the axial direction of the rotary shaft 3 in the plan view, it is possible to avoid collision interference between the tip of the split claw 16 and the base of the planting rod 15.

[0015]

As described above, according to the present invention, in the rotary type seedling plant, the gear train provided in the rotary body
The split claw planting rod, because the tip of the split claw in the planting rod is to perform a swinging movement so as to draw a locus of a long elliptical closed loop in the up-down direction, compared with the conventional rotary seedling planting device, The torque fluctuation when the planting case is swung is reduced, the planting posture of the seedlings in the field can be stabilized, and the vibration can be greatly reduced and the durability can be improved.

In addition, according to the present invention, a ridge is integrally formed on each of the left and right side surfaces of the rotating body case corresponding to each of the planting shafts, and each of the planting shafts is formed in each of the ridges. By providing the ball bearings that support both ends, both ends of each planting shaft can be firmly supported by the two ball bearings with a distance, but the thickness of the rotating body case can be reduced. Since it is possible to avoid making the entire rotor case thick, it is possible to reduce the size and weight of the rotor case.

[Brief description of drawings]

FIG. 1 is a front view of a seedling planting device 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 in FIG.

FIG. 4 is a sectional view taken along line IV-IV of FIG.

FIG. 5 is a diagram showing a rotating state of an eccentric gear.

[Explanation of symbols]

 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 19 Intermediate gear 20 Planetary gear 7 Phase adjusting mechanism 4a, 4b Raised part 4a ', 4b' Ball bearing

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. In the case, planting shafts are axially supported in parallel to the rotary shaft at equal parts on the circumference centered on the rotary shaft, and extend in the direction of the seedling table to be attached to the machine body on each planting shaft. In a seedling planting device comprising a planting rod equipped with a split claw,
A gear train is provided in the rotating body case for transmitting non-constant speed rotation to each of the planting shafts in accordance with the rotation of the rotating body case, and each of the planting rods is provided with a tip of a split claw in the planting rod. While swinging and swinging so as to draw a locus of an elliptical closed loop that is long in the vertical direction, a raised portion is integrally formed on the left and right side surfaces of the rotating body case corresponding to the planting axes. And a ball bearing for supporting both ends of each of the planting shafts is provided in each of the raised portions.