JPH03143312A - Seedling transplantation apparatus of transplantation machine - Google Patents

Abstract

PURPOSE:To suppress the deformation of a dividing claw in the case of increasing the amount of the seedlings taken out by turning a seedling transplantation member around a transplantation axis supporting the seedling transplantation member, thereby increasing or decreasing the amount of seedlings taken out of a seedling table. CONSTITUTION:A hollow transplantation shaft is rotatably fitted to both driving shafts at both ends of a rotary case 11 and each seedling transplantation member 20 is rotated around the transplantation shaft at various controlled rotational positions. The moving orbit of the tip end of the dividing claw 19 of each seedling transplantation member 20 is transferred from an elliptic closed loop curve D to another curve Da or Db to effect the increase or decrease of the amount of the seedlings taken out of the table. The distance from the center of the transplantation shaft to the tip end of the dividing claw is maintained constant independent of the variation of the delivery amount of the seedlings.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention uses a rotary type rice transplanter for dividing seedlings one by one from a seedling mat on a seedling platform and then planting the seedlings in a field. The present invention relates to a seedling planting device.

[Problems to be solved by the prior art and the invention] This type of rotary seedling planting device is known, for example, from Utility Model Publication No. 33-189.
This rotary-type seedling planting device is well known from publications such as Publication No. 22 and Publication Utility Model Publication No. 47-41635, etc., and has been recently developed because it plants seedlings with multiple seedlings in one seedling planting row. In particular, compared to the commonly used vertically swinging type seedling planting device, there is no vibration and the rice can be planted at high speed. It was not possible to apply a mechanism (one that pushes seedlings separated from a seedling mat into the field using a pusher).

The present invention aims to solve this problem.

[Means to solve the problem]

In order to achieve this object, the present invention attaches a rotating case that is rotationally driven by power transmission from a moving horn source to the machine body near the seedling stand, with its axis substantially horizontal, and that , a sun gear configured to be non-rotatable with respect to the body and rotatable with respect to the rotary case is provided at the rotation center position, while a sun gear is provided on the rotary case at the same position from the rotation center as the axis of the rotary case. A plurality of planetary gear shafts extending in parallel are fixed in a non-rotatable manner, and each planetary gear shaft has a planetary gear having the same number of teeth as the sun gear and meshing with the sun gear, and a sleeve-shaped shaft connected to the planetary gear. The planetary gear shaft and the sleeve-shaped shaft are fitted in each other so as to be rotatable, and the planetary gear shaft and the sleeve-shaped shaft protrude out of the rotating case, and the protruding end of the sleeve-shaped shaft has a split claw extending in the direction of the seedling platform and a split claw extending along the split claw. When attaching a plurality of seedling plants each equipped with a pushing tool that moves up and down, the projecting end of the planetary gear shaft from the rotating case has a claw that divides the pushing tool near the lower limit of the seedling plant. The structure is such that a cam is provided that moves downward toward the tip of the cam.

〔Example〕

Below, we will explain the drawings of the embodiments of the present invention applied to a walk-behind two-row rice transplanter. A rice transplanter is shown in which a float 6 for sliding on a field B is provided on the lower surface of the machine body 5 which also serves as a transmission case, and wheels 7 are mounted on both left and right sides of the machine body 5 via swing cases 8. In the body 5 of the rice transplanter 1, a claw shaft 9 which is rotatably driven by the power from the engine 2 is pivotally supported in a substantially horizontal direction at a position in front of the seedling stand 3. A rotary seedling planting device 10, which will be described in detail later, is attached.

As shown in FIGS. 3 to 5, this rotary-type seedling planting device 10 is equipped with an oval-shaped rotating case 11 that is fitted and fixed to the end of a claw shaft 9 that is a pivot support on a machine body 5. The case 11 rotates clockwise in the direction of arrow A when viewed from the side of the rice transplanter 1 by the claw shaft 9. A sun gear 12 is rotatably fitted onto the claw shaft 9 outside the rotating case 11, and The gear 12 is non-rotatably locked to the body 5 by a suitable rotational phase adjusting means 13.

At both left and right ends of the rotating case 11, planetary gear shafts 14 are supported parallel to the claw shaft 9 at equal distances from the claw shaft 9, and both planetary gear shafts 14 rotate with respect to the rotating case 11. A planetary gear 15 having the same number of teeth as the sun gear 12 is rotatably fitted onto both planetary gear shafts 14. Further, in the rotating case ll, an intermediate shaft 16 is provided at an intermediate position between the pawl shaft 9 and both planetary gear shafts 14.
is pivotally supported, and an intermediate gear 17 that meshes with both the sun gear 12 and the planetary gears 15 is fitted onto the intermediate shaft 16 to constitute a planetary gear mechanism (in this case, the planetary gears 15 are the sun gears). 12).

On the other hand, both planetary gear shafts 14 in the rotating case ll
A sleeve-shaped shaft 18 is rotatably fitted onto the top, one end of the sleeve-shaped shaft I8 and the planetary gear shaft 14 protrude outside the case 11, and the protruding end of the sleeve-shaped shaft 18 has a Hollow seedling plant body 20 equipped with a seedling dividing claw 19 at the tip
are fixed in position with their divided claws 19 facing toward the seedling platform 3.

The planetary gears 15 of both planetary gear shafts 14 have pawls 21 that protrude toward the sleeve-shaped shaft 18 , and the sleeve-shaped shaft 18 has pawls 22 that protrude toward the planetary gears 15 .
are provided in one direction, and both claws 21 and 22 are connected to the planetary gear 1.
When the planetary gears 15 rotate clockwise, they contact each other, and when the planetary gears 15 rotate counterclockwise, they separate from each other, and both claws 2
A ring-shaped spring body 23 is provided between the claws 21 and 22, and this ring-shaped spring body 23 prevents the left rotation of the planetary gear 15 from rotating around the sleeve-shaped shaft. 18.

On the other hand, each seedling plant 20 is provided with a hollow guide shaft 27 that extends parallel to the dividing claw 19 and is movable up and down.
A pushing tool 28 is provided at the lower end of the hollow guide shaft 27, and a spring 29 is provided inside to press the guide shaft 27 downward.
are provided for each. Further, a halberd-shaped lever 30 is disposed inside each seedling plant 20, one end of which is rotatably pivoted to the bin 3I, and the other end 32 is engaged with the upper end of the lever 30, By moving the lever 30 up and down, the pushing tool 2
8 is configured to move up and down, and further, the planetary gear shaft 1
4 is inserted into the seedling plant 20, a cam 33 is fixed to the planetary gear shaft 14 in the seedling plant 20, and the middle part of the lever 30 is brought into contact with the outer peripheral surface of the cam 33. The outer circumferential surface of the cam 33 is configured in such a shape that the lever 30 rotates downward only when each seedling plant 20 comes near the lower limit.

Note that a fan-shaped cam 24 is fixed to each of the intermediate shafts 16 in the rotating case 11, and stopper arms 25 are fixed to both sleeve-shaped shafts 18 in the rotating case 11.
are provided in one direction, and the seedling plant 20 is placed in the rotating case 1.
As the rotary case 1 rotates in the direction of arrow A, the lower limit of descent is reached from a height position corresponding to the lower end of the seedling stand 3 (that is, a position where the rotating case 11 is approximately horizontal) on the side facing the seedling stand 3. The stopper arm 25 on the sleeve-shaped shaft 18 is moved only in the section where the splitting claw 19 descends to a position slightly before (that is, the position where the dividing claw 19 penetrates into the field area B to a predetermined depth).
However, the arcuate outer peripheral surface 26 of the cam 24 on the intermediate shaft 16
By abutting against the sleeve, the counterclockwise rotation of the sleeve-shaped shaft 18 is delayed only in the above-mentioned section.

In this configuration, the rotating case 1 in the seedling planting device 10
1 revolves around the claw shaft 9 in the direction of arrow A, the seedling plant 20 attached to the sleeve-shaped shaft 18 fitted on the planetary gear shaft 14 at both ends revolves around the claw shaft 9. The sleeve-shaped shaft 18 to which the seedling plant 20 is attached is elastically connected to the planetary gear 15 via a spring body 23, and the planetary gear 15 meshes with the sun gear 12 via an intermediate gear 17 to form a sun gear. A planetary gear mechanism is constructed between the sun gear 12 and the planetary gear 15, and the number of teeth is the same between the sun gear 12 and the planetary gear 15. , as the rotating case 11 revolves in the direction of the arrow A, it rotates about the planetary gear shaft 14 in the direction of the arrow C, which is opposite to the direction of the arrow A, by the same rotation angle as the rotation angle of the revolution. The plant 20 rotates in the direction of arrow A while facing the direction of the seedling table 3, and during this turning movement, when it descends from top to bottom on the side facing the seedling table 3. After dividing only one seedling from the seedling mat on the seedling platform 3 with the dividing claw 19 at the tip, the tip of the dividing claw 19 enters into the field scene B near the lower limit, and then the field scene It rises from B.

During the revolution of the rotating case 11 in the direction of the arrow A, each seedling plant 20 rotates in the direction of the arrow C with respect to the planetary gear shaft 14, so that each seedling plant 20 is placed on the planetary gear shaft 14. The lever 33 that comes into contact with the cam 33 is connected to the seedling plant 20.
When the tip of the split claw 19 reaches the lower limit where it enters into the field area B, it rotates downward based on the shape of the cam 33, and this rotation causes the extrusion tool at the lower end of the guide shaft 27 to 28 is the split claw 1 as shown by the two-dot chain line in FIG.
9 descends toward the tip and pushes the seedlings into the field scene B to plant them. When this pushing-in planting is finished, the pushing tool 28 is released almost at the same time as the split claws 19 come out of the field scene B. It returns to its original position (the position indicated by the solid line in FIG. 8) from the tip of the dividing claw 19.

In addition, if the sleeve-shaped shaft 18 is provided with the stopper arm 25 and the intermediate shaft 17 is provided with the cam 24 as in the above embodiment, when the rotating case 11 is in a substantially horizontal state, it will face the seedling platform 3. In the side seedling plant 20, its sleeve-shaped shaft 18
As shown in FIG. 5, the stopper arm 25 contacts the arcuate outer peripheral surface 26 of the cam 24 on the intermediate shaft 16, and from this point on, the rotation of the seedling plant 20 in the direction of arrow C is stopped. Therefore, the rotation of the seedling plant 20 in the direction of arrow C is
This is because the revolution of the rotating case 11 in the direction of arrow A is delayed (however, the planetary gear 15 rotates in the direction of arrow C, and the pawl 2
1 and 22 are separated against the spring body 23, and elastic force is stored in the spring body 23), and the seedling plant body 20 is moved away from the rotating case 11.
As the split claw 19 revolves in the direction of the arrow A, its attitude is changed so that the dividing claw 19 is approximately perpendicular to the field scene B, enters the field scene B, and then moves in the direction of the arrow hole of the rotating case 11. When the stopper arm 25 comes off the arcuate outer circumferential surface 2G of the cam 24 due to the revolution of The splitting claws 19 move in the opposite direction to the direction of movement of the rice transplanter 1 when planting seedlings in the field scene B, that is, when planting, they move away from the later seedlings and move up from the field scene B, and eventually move up. Since the seedling plant 20 returns to its original position, the movement trajectory of the tip of the split claw 19 at this time is as follows.
As shown by the two-dot chain line in Fig. 7, the result is a vertically elongated closed-loop curve, and a closed-loop curve with the same shape as that of the vertically swinging seedling planting device disclosed in the above-mentioned Japanese Patent Publication No. 49-27762 is obtained. .

In this case, the cam 24 of the intermediate shaft 16 and the sleeve-shaped shaft 18
The planetary gear 1 of the seedling plant 20 is connected to the stopper arm 25 of
5 is changed to a system that delays the rotation relative to the revolution of the rotating case 11, and as shown in FIGS. A cam gear 24a having a toothless portion 26b is fixed, and a toothless stopper gear 25a with some teeth cut out on the circumference is provided on the sleeve-shaped shaft 18, thereby achieving the same effect as described above. It is also possible to do this.

Moreover, the present invention is not limited to the case where two seedling plants 20 are attached to one rotary case 11, but can of course be applied to the case where seedling plants on three sides are attached.

[Action/effect of the invention]

As described above, according to the present invention, it is extremely easy to forcefully plant a plurality of seedlings in a rotary seedling planting device using a planetary gear mechanism, and each seedling is Since the body is supported by a planetary gear shaft and a sleeve-shaped shaft that fits over the planetary gear shaft, it is possible to attach the seedling plant extremely firmly, and it is also possible to easily prevent the intrusion of muddy water, which increases its durability. It has the effect of improving

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 3 is a side view of a rice transplanter, FIG. -IV sectional view, Figure 5 is the 3rd
Figure 6 is a diagram showing the operating state of Figure 5, Figure 7 is a diagram showing the movement locus of the seedling plant, and Figure 8 is a diagram showing the movement trajectory of the seedling plant.
■-■ magnified cross-sectional view of the figure, Figure 9 is IX-IX of Figure 8.
X-continuous sectional view Figure 1O is a diagram showing another embodiment of the seedling planting device,
FIG. 11 is a diagram showing the operating state of FIG. 10. 1... Rice transplanter, 9... Claw shaft, 10... Seedling transplanting device, 11... Rotating case, 12... Sun gear, 14... Planetary gear shaft, 15... Planetary gear, 1
6...Intermediate shaft, 17...Intermediate gear, 18...
・Sleeve-shaped shaft, 19...divided claw, 20...seedling plant, 21.22...claw, 23...spring body, 2
4...Cam, 25...Stopper arm, 24
a...Cam gear, 25a...Stopper gear, 7...Guide shaft, 8...Extrusion tool,...Spring, -Lever...Cam.

Claims (1)

[Claims] (1) A rotating case, which is rotationally driven by power transmission from a power source, is attached to the machine body near the seedling stand with its axis substantially horizontal, and inside the rotating case, the center of rotation is located at the center of rotation. A sun gear configured to be non-rotatable with respect to the aircraft body and rotatable with respect to the rotating case is provided, while a plurality of planets extending parallel to the axis of the rotating case are provided at equal positions from the rotation center of the rotating case. A gear shaft is fixed in a non-rotatable manner, and a planetary gear having the same number of teeth as the sun gear and meshing with the sun gear, and a sleeve-shaped shaft connected to the planetary gear are rotatably fitted onto each of the planetary gear shafts. , the planetary gear shaft and the sleeve-shaped shaft protrude outside the rotating case, and the protruding end of the sleeve-shaped shaft is provided with a split claw extending in the direction of the seedling stand and a pushing tool that moves up and down along the split claw. While attaching a plurality of seedling plants equipped with the same, to the protruding end of the planetary gear shaft from the rotating case, the extruder is moved downwardly toward the tip of the split claw near the lower limit of the seedling plant. A seedling planting device in a rice transplanter, which is equipped with a cam that is shaped like this.