JPH06253631A - 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 vibration and simultaneously shorten the total length of a rice transplanter 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, a movement locus 21 is constructed so that nearly the central part (21c) in the lowing movement locus in the movement locus 21 may enter the lower side of a seedling carrier 17 by a suitable distance (L) from the vertical line (17a) passing through the lower end of the seedling carrier 17.

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 is moved so that the tip of the split claw in each planting draws a locus of an elliptical closed loop which is long in the vertical direction. A mechanism for this is required, and conventionally, this movement is configured to be performed by a crank mechanism. However, with this crank mechanism, since the torque fluctuation is large, the posture of planting seedlings in the field scene is In addition to being unstable, there is a problem in that vibration cannot be sufficiently reduced and the durability is low.

In addition, in this conventional rotary type seedling planting device, of the movement loci at the tips of the dividing claws, the substantially central portion of the descending movement locus is located at a site on the vertical line passing through the lower end of the seedling stand. By doing so, the distance from the seedling mounting table to the center of the rotating body case becomes long,
There was also the problem that the total length of rice transplanters would increase. The present invention has a technical object to solve all of these problems in the rotary type seedling planting device at once.

[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 rotating body case, planting shafts are axially supported parallel to the rotating shaft at equal parts on a circumference centered on the rotating 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 movement locus of an elliptical closed loop that is long in the vertical direction, while it is long in the vertical direction. Of the locus of movement of the elliptical closed loop, the substantially central portion in the descending locus was configured to enter the underside of the seedling table by an appropriate distance from the vertical line passing through the lower end of the seedling table.

[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. 1 is held in a non-rotating state with respect to 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 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.

On the other hand, in the rotating body case 4, an intermediate shaft 18 is rotatably supported in parallel with both shafts at an intermediate position between the central shaft 5 and the planting shaft 14, 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 constantly meshes with an intermediate gear 19 on the intermediate shaft 18 is fitted onto 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. Interlockingly connect so as to make one rotation.

Further, regarding the sun gear 6, the intermediate gear 19 and the planetary gear 20, the centers (O), (O ') and (O ") of the respective gears 6, 19 and 20 have axes 5 and 5, respectively. The eccentric gear is configured to be eccentric by an appropriate dimension (e) with respect to the center of rotation of 18 and 14. When the rotating body case 4 revolves in the right direction of the arrow A by the rotating shaft 3, the rotating body case 4 is rotated relative to the transmission case 1. The intermediate gear 19 meshing with the non-rotatable sun gear 6 rotates in the right direction of the arrow B by the same rotation angle as the revolution of the rotating body 4 as the rotor 4 revolves. The rotation of the intermediate gear 19 causes the planting shaft 14 that interlocks via 20 to rotate in the left direction of the arrow C, that is, in the direction opposite to the revolving direction of the rotating body case 4, so that the planting rod 15 attached to the planting shaft 14 is , Facing the seedling stand 17 Remains, will be pivotal movement about the axis of rotation 3, dividing the planting rod 15 pawl 16
Will draw a closed-loop motion locus 21 as shown by the chain double-dashed line in FIGS.

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. , And is planted in the field scene 22 in the vicinity of the lower limit of the descending, and then rises above the field scene 22. By the way, the sun gear 6 and the intermediate gear 19
In addition, the planetary gear 20 is arranged such that the centers (O), (O ′) and (O ″) of the respective gears 6, 19 and 20 are appropriately dimensioned (e) with respect to the rotation centers of the shafts 5, 18 and 14 in each of them. ), The rotation of the planting shaft 14 to the left along with the revolution of the rotating body case 4 to the right rotates to 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 leftward rotation of the planting shaft 14 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, the closed loop of the movement locus 21 of the tip of the split claw 16 of each planting rod 15 becomes a slender elliptical shape in the vertical direction as shown by the chain double-dashed line in FIGS. 1 and 5.

In this case, the eccentric direction of the sun gear 6, the intermediate gear 19 and the planetary gear 20, the eccentric dimension (e), etc. are appropriately set so that the tip end of the split claw 16 can be vertically moved. Of the long elliptical motion locus 21, from the uppermost end portion 21a to the lowermost end portion 21.
Substantially central portion 21c in the descending trajectory until reaching b
Is configured to enter the lower side of the seedling placing table 17 by an appropriate distance (L) from the vertical line 17a passing through the lower end of the seedling placing table 17.

With this structure, the rotating shaft 5 which is the center of rotation of the rotating body case 4 can be brought closer to the seedling stand 17 by the entering distance (L). 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 sun gear 6 is used.
As a result, the phase position of the central axis 5 is displaced 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 6-positioned planting rod 15 changes its angle (θ ″) downward, and the motion locus of the split claw 16 shifts from the motion locus 21 before displacement to 21 ″. The amount of seedlings to be taken out can be freely adjusted by adjusting the phase of the central shaft 5, so that the phase of the central shaft 5 can of course be adjusted while the rotating body case 4 is rotating. It is possible even during operation.

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. And a mounting base of the planting rod 15 to the planting shaft 14,
If the portion to which the split claw 16 is attached or the tip of the split claw 16 is displaced by an appropriate dimension (S) in the axial direction of the rotary shaft 3 in the plan view of FIG. 2, the tip of the split claw 16 and the planting rod 15 The collision interference with the base can be avoided.

[0016]

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.

Further, according to the present invention, the substantially central portion of the descending motion locus of the elliptical motion locus elongated in the vertical direction at the tip of the split claw is appropriately separated from the vertical line passing through the lower end of the seedling stand. By configuring so as to enter the underside of the seedling table, the rotation axis that is the center of rotation of the rotating body case can be brought close to the seedling table, so that only this amount,
It has the effect of shortening the overall length of the rice transplanter.

[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]

 1 transmission case 3 rotating shaft 4 rotating body case 5 center shaft 6 sun gear 14 planting shaft 15 planting rod 16 split claw 17 seedling mount 17a vertical line passing through the lower end of seedling mount 19 intermediate gear 20 planetary gear 21 motion trajectory 21a motion Uppermost part of locus 21b Lowermost part of motion locus 21c Near center of descending locus 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. In the case, planting shafts are axially supported in parallel with 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 it is configured to swing and rotate so as to draw a movement trajectory of an elliptical closed loop that is long in the vertical direction,
Of the motion locus of the elliptical closed loop that is long in the up-down direction, a substantially central portion in the descending motion locus is configured to enter the underside of the seedling table by an appropriate distance from the vertical line passing through the lower end of the seedling table. Rice planting equipment for rice transplanters.