JPH06153638A - Seedling-planting machine in rice transplanter - Google Patents

Abstract

PURPOSE:To reduce damage to seedlings and stabilize the seedling-planting posture to the field, in a rotary seedling-planting machine having a structure where plural seedling-planting units each equipped with a dividing tine are set to a rotary case and designed so that the top part of a dividing tine in the seedling-planting unit may draw a vertically long oval closed loop-shaped locus of movement. CONSTITUTION:This seedling-planting machine is designed so as to reduce the moved distance (S) of the top part of a dividing tine 19 along a curve (D) of a locus of movement corresponding to a unit rotational angle (DELTAtheta) of a rotary case 11 to (S1) when the dividing tine 19 passes through the position of a seedling carrier 3 and to reduce that distance to (S2) when the dividing tine 19 is inserted into the field surface (B).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary type seedling planting device for planting a seedling in a field after splitting the seedlings one by one from a seedling mat on a seedling mount in a rice transplanter. .

[0002]

2. Description of the Related Art Conventionally, a seedling planting apparatus of this type has a base end of a seedling plant having a split claw for seedling on the tip side of the machine body as described in Japanese Patent Publication No. 49-27662. While connecting through an agitating link, the middle part of the seedling plant is pivotally attached to the tip of a crank fixed to a claw shaft that is rotationally driven by an engine, and the seedling plant is divided by the rotation of the crank. By constructing the tip of the nail to swing up and down so as to draw a locus of an elliptical closed loop that is long in the vertical direction, the seedlings are not damaged when splitting from the seedling mat, and the seedlings are split after planting in a field scene. The claw was designed to quickly escape from the seedling to stabilize the seedling planting posture, but this crank-type seedling planting device has a large vibration due to its vertical swing, and the planting speed is slow. There was a problem such as.

Then, recently, for example, Japanese Patent Publication No. Sho 49-
As described in Japanese Patent No. 17806, Japanese Patent Publication No. 49-17807, etc., in the aircraft near the seedling mount,
A rotating case, which is rotationally driven by power transmission from a power source, is disposed so as to rotate about a horizontal horizontal axis.
At a plurality of locations on the circumference centered on the axis in the rotating case, planting shafts are pivotally supported in parallel with the axis, and the planting shafts having split claws are provided on the planting shafts. While installing in a posture toward the mounting table side, in the rotating case, provided with a mechanism for transmitting non-constant speed rotation to the planting shaft with the rotation of the rotating case, the seedling plant A so-called rotary seedling planting device has been proposed in which the tip of the split claw in the seedling planting body is configured to swing and rotate so as to draw a movement locus of an elliptical closed loop curve that is long in the vertical direction.

[0004]

However, in this rotary type seedling plant, since the moving speed of the tip of the dividing claw in each seedling plant is significantly higher than that of the crank type seedling plant, the split type seedling plant is divided. When the nail passes through the seedling mount,
There is a problem that not only the seedlings are often damaged, but also the posture of planting the seedlings in the field scene becomes unstable due to the split nails.

SUMMARY OF THE INVENTION The present invention has a technical object to solve the above-mentioned problems in a rotary type seedling planting device.

[0006]

In order to achieve this technical object, the present invention provides a body near a seedling stand with a rotating case which is rotationally driven by power transmission from a power source in a substantially horizontal direction. Arranged so as to rotate around the axis, and at a plurality of locations on the circumference of the rotation case around the axis, planting shafts are axially supported in parallel with the axis, and the planting shaft is divided into split claws. While mounting the seedling plant with a posture toward the seedling mounting table side, in the rotating case, to transmit the non-constant speed rotation to the planting shaft with the rotation of the rotating case. A seedling planting device provided with a mechanism for swinging and pivoting the seedling plant so that the tips of the split claws in the seedling plant draw a movement locus of an elliptical closed loop curve that is long in the vertical direction. At the unit rotation angle of the rotating case The amount of movement of the tip of the split claw along the curve of the movement trajectory is configured to be small when the split claw passes through the place of the seedling mounting table and when the split claw enters the field scene. .

[0007]

Embodiments of the present invention will be described below with reference to the drawings in which the embodiment of the present invention is applied to a walking type Nijo Ueda transplanter.
In the figure, reference numeral 1 is a machine body 5 that also serves as a transmission case and has an engine 2 in the front part and a seedling stand 3 and a handle 4 in the rear part.
A float 6 that slides in a field scene B is provided on the lower surface of the vehicle, and wheels 7 are provided on both left and right sides of the machine body 5 in a swing case 8.
1 shows a rice transplanter that is mounted via a claw shaft 9 that is rotationally driven by power from the engine 2 in a front position of the seedling mounting table 3 in the body 5 of the rice transplanter 1. A rotary type seedling planting device 10, which will be described later in detail, is attached to the left and right ends of the claw shaft 9.

This rotary type seedling planting apparatus 10 is shown in FIGS.
As shown in FIG. 3, an oval type rotating case 11 fitted and fixed to an end of a claw shaft 9 pivotally supported on the machine body 5 is provided, and the rotating case 11 is viewed from the side of the rice transplanter 1 by the claw shaft 9. In the rotating case 11, the sun gear 1 is rotated on the claw shaft 9 as shown by an arrow A in FIG.
2 is rotatably fitted, and the sun gear 12 is non-rotatably locked to the machine body 5 through an appropriate rotation phase adjusting means 13.

The planetary gear shafts 14 are provided on both left and right ends of the rotating case 11 at positions at the same distance from the pawl shaft 9.
The planetary gear shafts 14 are rotatably supported in parallel with each other, and the planetary gear shafts 14 are non-rotatably fixed to the rotating case 11, and the planetary gear shafts 14 have the same number of teeth as the sun gear 12 on the planetary gear shafts 14. 15 is rotatably fitted. An intermediate shaft 16 is axially supported in the rotary case 11 at an intermediate position between the pawl shaft 9 and the planetary gear shafts 14, and both the sun gear 12 and the planetary gear 15 are mounted on the intermediate shafts 16. Intermediate gear 1 meshing with
7 is fitted to form a gear train mechanism.

On the other hand, a sleeve-shaped planting shaft 18 is rotatably fitted on both planetary gear shafts 14 in the rotary case 11, and one end of the sleeve-shaped planting shaft 18 is provided outside the rotary case 11. The seedling plant 20 having the seedling dividing claw 19 at the tip is fixed to the projecting end in such a position that the dividing claw 19 faces the seedling placing table 3.

The planetary gears 15 of the two planetary gear shafts 14 have a claw 21 projecting toward the planting shaft 18.
The planting shaft 18 is integrally provided with pawls 22 projecting toward the planetary gear 15, and the pawls 21 and 22 are brought into contact with each other when the planetary gear 15 rotates to the right.
Are configured to separate from each other when they rotate counterclockwise,
A ring-shaped spring body 23 is provided between the pawls 21 and 22 to urge the pawls 21 and 22 in a direction in which the pawls 21 and 22 come into contact with each other, and the ring-shaped spring body 23 is used to plant the left rotation of the planetary gear 15. The fan-shaped cams 24 are fixed to the intermediate shafts 16 in the rotary case 11 while being elastically transmitted to the shaft 18. Is provided with stopper arms 25 integrally, and at the lower end of the seedling placing table 3 on the side where the seedling plant 20 faces the seedling placing table 3 as the rotating case 11 rotates in the direction of arrow A. In a section descending from a corresponding height position (that is, a position where the rotating case 11 is substantially horizontal) to a position slightly below the lower limit of descending (that is, a position where the split claw 19 penetrates into the field scene B to a predetermined depth). only,
The stopper arm 25 of the planting shaft 18 abuts the arcuate outer peripheral surface 26 of the cam 24 on the intermediate shaft 16 so that the left rotation of the planting shaft 18 is delayed only in the above section. is there.

In this structure, when the rotating case 11 of the seedling planting device 10 revolves in the direction of the arrow A by the pawl shaft 9, the seedling planting shafts 18 fitted to the planetary gear shafts 14 at both ends thereof are mounted. The body 20 revolves around the pawl shaft 9, but the planting 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 is an intermediate gear 17. Via the sun gear 12 to form a gear train mechanism with the sun gear 12, and the sun gear 12 and the planetary gear 15 have the same number of teeth. Planting shaft 18 connected to
Is rotated about the planetary gear shaft 14 in the direction opposite to the direction of the arrow A by the same rotation angle as the rotation angle of the revolution of the rotating case 11 in the direction of the arrow A. Both seedling plants 20 attached to the planting shaft 18,
In the state in which the seedling placing table 3 is oriented and the posture is kept constant with respect to the seedling placing table 3, the turning movement is performed in the direction of the arrow A. When descending from the top to the bottom on the side facing the placing table 3, one seedling is split from the seedling mat on the seedling placing table 3 by the splitting claw 19 at the tip, and then in the vicinity of the lower limit of the descending field B It is planted in and then rises above the scene B in the field.

In this case, when the rotating case 11 is in a substantially horizontal state, in the seedling plant 20 on the side facing the seedling mounting table 3, the stopper arm 25 of the planting shaft 18 has an intermediate position as shown in FIG. Circular arc-shaped outer peripheral surface 2 of cam 24 on shaft 16
6 and the rotation of the seedling plant 20 in the opposite direction to the arrow A stops from this point, so that the arrow A of the seedling plant 20 is stopped.
The rotation in the opposite direction is delayed with respect to the revolution of the rotating case 11 in the direction of the arrow A (however, the planetary gear 15 has the arrow A).
Rotating in the opposite direction, the claws 21 and 22 are separated from each other against the spring body 23, and elastic force is stored in the spring body 23), and the seedling plant 20 moves in the direction of arrow A of the rotating case 11. With the revolution, the postures of the split claws 19 are changed so as to be substantially vertical to the field scene B and enter the field scene B.

When the stopper arm 25 disengages from the arcuate outer peripheral surface 26 of the cam 24 as the rotating case 11 revolves in the direction of arrow A, the seedling plant 20 is replaced by the spring body 23.
By the elastic force of the planetary gear shaft 14 in the direction opposite to the arrow A, the planetary gear shaft 14 is rotated in the opposite direction.
After planting the seedlings in the field scene B, it moves upward from the field scene B while moving in a direction opposite to the traveling direction of the rice transplanter 1, that is, moving away from the seedlings after planting, and eventually the seedling plant 20 returns to the original state. Since the posture returns to the posture, the movement locus of the tip of the split claw 19 at this time becomes an elliptic closed loop curve D which is long in the up-down direction as shown by the chain double-dashed line in FIG. 7. For example, Japanese Patent Publication No. 49-27762. A closed loop curve having the same shape as that of the crank type seedling planting device described in the publication etc. can be obtained.

That is, when the split claws 19 are descending toward the field scene B with the split claws 19 holding the seedlings, the postures of the two seedling plants 20 are vertically changed to enter the field scene B, and the planted field after planting. When the seedling leaves the surface B, it rises while escaping away from the seedling after planting, so that the seedling can be reliably planted in the field scene B under the correct posture. In this case, the tip of the split claw 19 with respect to the unit rotation angle Δθ of the rotating case 11 may be adjusted by adjusting the timing when the rotation of each seedling 20 is delayed or advanced relative to the revolution of the rotating case 11. The movement amount S along the curve D of the movement trajectory is reduced to S1 when the dividing claw 19 passes through the place of the seedling placing table 3, and
Even when the split claw 19 enters the field B, the size is reduced to S2.

With this configuration, the moving speed of the split claws 19 in each seedling plant 20 can be set at
Is delayed when passing through the place of the seedling placing table 3 and when entering the field B, so that the split claws 19 damage the seedling when dividing the seedling from the seedling mat on the seedling placing table 3. On the other hand, when the seedlings are planted in the field scene B with the split claws 19, it is possible to reduce the fluctuation of the planting posture.

In the above embodiment, the cam 2 of the intermediate shaft 16 is used.
4 and the stopper arm 25 of the planting shaft 18 delay the rotation of the seedling plant 20 by the planetary gear 15 with respect to the revolution of the rotating case 11, thereby transmitting non-uniform rotation to the planting shaft 18. However, changing to this method,
As shown in FIGS. 8 and 9, on the intermediate shaft 16, a cam gear 24a having an arcuate outer peripheral surface 26a and a toothless portion 26b is fixed on a part of the circumference, while on the planting shaft 18, , A toothless stopper gear 25a is formed by cutting out a part of the teeth of the circumference, and these are used to perform the same operation as described above, that is, the planting shaft 1 with the rotation of the rotating case 11.
8 may be configured to transmit non-uniform speed rotation to the cam gear 24a. According to this embodiment, it is possible to restore the seedling plant 20 delayed with respect to the revolution of the rotating case 11 to the original position by the cam gear 24a. Since it can be performed by meshing rotation of the stopper gear 25a with the stopper gear 25a, there is an advantage that the spring body 23 that elastically connects the planetary gear 15 and the seedling plant 20 can be downsized.

Further, the present invention is not limited to the case in which the two seedlings 20 are attached to the single rotating case 11, and it is needless to say that the present invention can be applied to the case in which three or more seedlings are attached.
Further, the planetary gear and the seedling plant may be connected by a connecting means made of another elastic body such as rubber.

[0019]

As described above, according to the present invention, in the rotary type seedling planting device, the tips of the split claws in each seedling plant form a movement locus of an elliptical closed loop that is long in the vertical direction. When configuring, the movement amount along the curve of the movement locus of the split claw tip with respect to the unit rotation angle of the rotating case, when the split claw passes the place of the seedling mounting table, and the split claw in the field scene. Since the moving speed of the dividing claw can be slowed when the dividing claw passes through the place of the seedling mounting table and when entering the field scene, the dividing claw is configured to be small when entering. When the nail splits the seedling from the seedling mat on the seedling mounting table 3,
While the damage to the seedlings can be reduced, there is an effect that it is possible to reduce the fluctuation of the planting posture when the seedlings are planted in the field scene with the split nails.

[Brief description of drawings]

FIG. 1 is a side view of a rice transplanter.

FIG. 2 is a plan view of FIG.

FIG. 3 is a vertical sectional front view of a seedling planting device according to an embodiment of the present invention.

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

5 is a cross-sectional view taken along line VV of FIG.

FIG. 6 is a diagram showing the operating state of FIG. 5;

FIG. 7 is a diagram showing a movement trajectory of a seedling plant.

FIG. 8 is a sectional view of a seedling planting device according to another embodiment of the present invention.

FIG. 9 is a diagram showing an operating state of FIG.

[Explanation of symbols]

 1 rice transplanter 9 claw shaft 10 seedling planting device 11 rotating case 12 sun gear 14 planetary gear shaft 15 planetary gear 16 intermediate shaft 17 intermediate gear 18 planting shaft 19 split claw 20 seedling plant 21, 22 claw 23 spring body 24 cam 25 stopper Arm 24a Cam gear 25a Stopper gear.

Claims (1)

[Claims] 1. A rotating case, which is rotationally driven by power transmission from a power source, is arranged on a machine body near a seedling mounting table so as to rotate about an axis of a substantially horizontal lateral direction. At a plurality of locations on the circumference centering on the axis, a planting axis is pivotally supported in parallel with the axis, and a seedling plant provided with a split claw on the planting axis is directed toward the seedling platform side. On the other hand, in the rotating case, provided with a mechanism for transmitting non-constant speed rotation to the planting shaft with the rotation of the rotating case, the seedling plant in the seedling plant In a seedling planting device configured to swing and rotate so that the tip of the split claw draws a movement locus of an elliptical closed loop curve that is long in the vertical direction, the movement of the tip of the split claw with respect to a unit rotation angle of the rotating case. The amount of movement along the trajectory curve is When the split nail is passed through the seedling mounting table locations, and split nails NaeUe device in rice transplanter, characterized in that is configured to reduce the time it enters the field surface.