JPS6066909A - Seedling planting device in rice planter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seedling planting device for a rice transplanter, which divides seedlings into individual plants from a seedling mat on a seedling stand and then plants the seedlings in a field.

Conventionally, this type of seedling planting device was developed by, for example, the Japanese Patent Publication No. 49-2776.
As described in Publication No. 2, the proximal end of a seedling plant having a seedling dividing claw at the tip is connected to the fuselage side via a fan link, while the middle part of the seedling plant is connected to the engine. The tip of a crank, which is fixed to a nail shaft that is rotated by the machine, is pivoted, and the rotation of the crank causes the seedling plant to be swung downward by 1'' so that the dividing nails at the tip draw a closed loop trajectory. .

However, compared to the previous rotary set described in Japanese Utility Model Publication No. 33-18922, this conventional vertically swinging type seedling planting device has a closed-loop movement trajectory in the split claw that is elongated in the vertical direction. Since the seedlings can be split from the seedling mat without being damaged, the splitting claws quickly escape from the seedlings after the seedlings are planted in the field, which stabilizes the posture of the seedlings during planting. On the other hand, vibration is generated due to the vertical swing, and this vibration increases in proportion to the speed of the vertical swing, and this vibration occurs per - times of vertical swing, that is, one part of the claw axis. Since seedlings can only be planted once per rotation, the speed of planting cannot be increased.In addition, the two-T swinging type seedling planting device does not allow seedlings to be removed from the seedling mat during the planting process. It is not possible to increase or decrease the amount of seedlings taken out, and the amount of seedlings taken out cannot be adjusted.
It was extremely inconvenient because the planting work had to be interrupted each time.

In the present invention, the seedling planting device is a rotary set having a plurality of seedling planting bodies per rotation of the claw shaft, and the dividing claw of each seedling planting body is connected to a planetary gear between the seedling planting body and the claw shaft. The mechanism draws a closed-loop motion trajectory similar to the splitting claw of the vertically swinging seedling planting device, which improves the planting speed without increasing vibration, and further reduces the amount of seedlings taken out. The joints are extremely simple, and the implant can be done even during work.

The following will explain the drawings of an embodiment in which the present invention is applied to a walk-behind two-row rice transplanter. Folders 17-1 and 6 that run along the 11171 scene B are provided on the lower surface of the fuselage 5, which also serves as a transmission case, and the fuselage 5
Iff 4i'j fJl! with axle 7 mounted on both the left and right sides of L7 via swing case 8. , and the corresponding field 1ff
In the fuselage 5 of the i-machine 1, a claw shaft 9 rotatably driven by a force from the engine 2 is supported in a substantially horizontal direction at a position in front of the seedling stand 3, and both left and right ends of the claw shaft 9 are supported. is equipped with a rotary set of seedling planting device 1f10, which will be described in detail later.

The 11゛f transplantation device 10 of this 11-crystal set is shown in Figs.
As shown in FIG. 5, the end of the claw shaft 9 supported by the machine body 5 is covered with 11'! A fixed rotating case 11 is provided, and the rotating case II is fixed to the rice transplanter 1 by 1 μm using the claw shaft 9.
A sun gear 12 is rotatably fitted onto the pawl shaft 9 in the rotating case 11, and the sun gear 12 rotates to the right in the direction of the arrow in the m-plane view. They are non-rotatably connected via phase adjustment means 13 (described in detail later).

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. The two planetary gear shafts 14 are fixed in a non-rotatable manner, and two idler gears 15 having the same number of teeth as the sun gear 12 are rotatably fitted onto both planetary gear shafts 14. Further, in the rotating case 11, an intermediate shaft 16 is provided at an intermediate position between the pawl shaft 9 and both planetary gear shafts 14.
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 form a planetary gear mechanism.

On the other hand, both 3 in the rotating case 11 are connected to the star gear shaft 1.
4, a sleeve-shaped shaft 18 is rotatably fitted,
One end of the sleeve-shaped shaft 18 protrudes outside the case 11,
A seedling planting body 20 having a seedling dividing claw 19 at its tip is fixed to each of the projecting ends with the dividing claw I9 facing toward the seedling mounting table 3.

A planetary float 15 is attached to both the planetary gear shafts 14.
The sleeve-like shaft 18 is provided with a claw 2I projecting toward the sleeve-shaped shaft 18, and the sleeve-like shaft 18 is integrally provided with a claw 22 projecting toward the planetary gear 154. When the gears 15 rotate clockwise (3-), they come into contact with each other, and the planetary floats 15
are configured so that they separate from each other when rotating to the left, and
A ring-shaped spring body 23 is provided between the claws 2j and 22 to bias the claws 21 and 22 in a direction in which they come into contact with each other.
The ring-shaped spring body 23 is configured to elastically transmit the counterclockwise rotation of the planetary gear 15 to the sleeve-shaped shaft 18, and the rain intermediate shaft 16 located inside the rotating case 11 has a fan-shaped While the cams 24 are each fixed, a stopper arm 25 is attached to both sleeve-shaped shafts 18 that fall inside the rotating case 11.
are provided integrally with each other, and the seedling plant 20 is placed in the rotating case 1.
1, a height position corresponding to the lower end of the seedling platform 3 (%) is placed on the side facing the seedling platform 3 (
In other words, from the position where the rotating case 11 is approximately horizontal) to the position W slightly before the lower limit (in other words, the dividing claw 19
The stopper arm 25 of the sleeve-shaped shaft 18 comes into contact with the arcuate outer circumferential surface 26 of the cam 24 on the intermediate shaft 1G only in the section where it descends to a predetermined depth (the position where it penetrates to a predetermined depth). Only the left rotation of the sleeve-shaped shaft I8 is delayed.

Furthermore, the phase adjustment means 13, as shown in FIG.
A handle 2 that fits into a nut piece 27 protruding from the fuselage 5
8 with a threaded shaft 29, and an annular groove 3 at the tip of the threaded shaft 29.
0, the pin 31 protruding from the post 12a of the sun gear 12 is engaged, and the sun gear 1 is rotated by rotation of the screw shaft 29.
It is constructed so as to adjust the phase of the two.

In this configuration, the rotating case in the seedling planting device 1o]
When J revolves around the claw shaft 9 in the direction indicated by the arrow, the seedling plant 2o 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 2o is attached is elastically connected to the planetary gear 15 via the spring body 23, and the planetary gear 15 meshes with the sun gear 12 via the intermediate gear 17.
An M star gear mechanism is formed between J#j wheel 12, and the moon...
The sun gear 12 and the planet gear 15 have the same number of teeth.
8 In addition, as the rotation case 11 revolves in the direction indicated by the arrow, the seedling plant 2o rotates at the same rotation angle as that of the revolution. Since it rotates around , both picture types 2o are
While facing the direction of the seedling platform 3 and maintaining a constant attitude toward the seedling platform 3, the 777 platform rotates in the direction of the arrow. When descending downward, the splitting claw 19 at the tip divides one seedling from the seedling mat on the seedling platform 3, and then near the lower limit of the descent, the field scene B After that, it rises higher than in field scene B.

In this case, when the rotating case 11 is in a substantially horizontal state,
As shown in FIG.
The rotation of the seedling 41a body 20 in the direction of arrow C is stopped at this point when the cam 24 on the intermediate shaft 16 comes into contact with the arcuate outer circumferential surface 26, thereby causing the rotation of the seedling plant body 20 in the direction of arrow C. However, the planetary gear 15 rotates in the direction of arrow C, and the pawls 21 and 22 separate against the spring body 23, 20 seedlings, the sexual power will be weakened.
When the rotating case 11 revolves in the direction of arrow A ('l' means
The dividing claw 19 is changed in attitude so as to be substantially perpendicular to the field scene B, and enters the field scene B.

As the rotating case 11 revolves in the direction indicated by the arrow, the stopper arm 25 moves toward the arcuate outer circumferential surface of the cam 24.
6, the seedling planting body 2o is rotated back around the planetary gear shaft 14 in the direction of arrow C by the elastic force of the spring body 23, and this returning rotation causes the dividing claws 19 to plant the seedlings in the field area B. After U, the rice transplanter 1 is moving in the opposite direction to the direction of movement, that is, moving away from the seedlings one position after planting, while moving in the field scene B.
Since the seedling plant 20 eventually returns to its original position, the locus of movement of the tip of the splitting claw 19 at this time is a closed loop of 1 square section vertically, as shown by the two-dot chain line in FIG. This results in a closed loop curve having the same shape as that of the vertically swinging seedling planting device disclosed in Japanese Patent Publication No. 49-27762.

In other words, the two picture plants 20 here are the split nails.9
When descending towards field scene B while holding the seedlings, it changes its posture vertically and enters field scene B, and when it leaves the field scene B after planting, there is no one from the seedlings after the first planting stage. Since the seedlings rise while escaping as if they were being washed away, it is possible to plant the seedlings in the correct position.

The amount of seedlings taken out from the seedling platform 3 by the dividing claws 19 of the seedling plant body 20 can be freely adjusted by changing the phase of the sun float 12 by the phase adjusting means 13.

That is, if the phase of the sun gear 12 is shifted to the right as shown by the arrow E in FIG. 8 using the phase adjusting means 13, the split claw 194''J and the seedling plant 2o will be moved as shown by the dotted line in FIG. It is displaced downward and its tip moves [the trace is D before displacement].
As the temperature shifts from to Da, the control of the amount of seedlings removed increases,
Further, the phase of the sun gear 12 is adjusted to the eighth position by the phase adjusting means 13.
Arrow I in the diagram? If the seedling plant 20 with the splitting claw 19 is displaced to the left as shown in FIG. 7, it will be displaced upward as shown by the dashed line in FIG. Therefore, the amount of seedlings taken out can be freely adjusted by adjusting the phase of the sun gear 12, so that the amount of seedlings taken out can be freely adjusted by adjusting the phase of the sun gear 12. This can be done even during operation.

In addition, in the above embodiment, the rotation of the seedling plant 20 by the planetary gear 15 is delayed with respect to the revolution of the rotation case 11 by the cam 24 of the intermediate shaft J6 and the stopper arm 25 of the sleeve-shaped shaft 18. However, by changing to this method,
As shown in FIG. 9 and FIG. 9, a cam gear 24a having an arc-shaped outer circumferential surface 26a and a notch 26b is fixed on a part of the circumference of the intermediate shaft 16, while A notch-type stopper wheel 25a having a part of the teeth cut out on the circumference may be provided to perform the same function as described above.According to this embodiment, the rotating case The cam gear 24;
This is possible by meshing rotation with the planetary gear I5 and the seedling plant 2 ((), so there is an advantage that the spring body 23 that elastically connects the planetary gear I5 and the seedling plant 2 (() can be made smaller. Of course, this advantage can be applied not only to the case where two seedling plants 20 are mounted, but also to the case where two seedling plants are mounted on three sides.Furthermore, regarding the phase adjustment means 13 for the sun gear 12, Not limited to the illustrated one, a hydraulic, pneumatic or electric type, or a manual type may be used. It is also possible to connect them by

As described above, in the present invention, a rotating case that is rotationally driven by power transmission from a power source is attached to a machine body near a seedling stand with its axis substantially horizontal, and inside the rotating case,
A sun gear configured to be freely rotatable with respect to the rotating case is installed at the center of rotation, while split claws extending in the direction of the seedling stand are provided on the rotating case at equal positions from the center of rotation. A plurality of seedling plants are provided rotatably around an axis parallel to the axis of the rotating case, and each seedling plant is meshed with the sun gear via an intermediate gear in the rotating case. each planetary gear is provided, each of the 'Ii star gears has the same number of threads as the sun gear, and each of the planetary gears and the seedling plant are connected by an elastic connection means,
Further, a space between the intermediate gear and the seedling plant is provided so that when each seedling plant descends toward the field at 11' with the rotation of the rotating case, the rotation of the seedling plant by the planetary gear is controlled at a constant rate. A seedling planting device for a rice transplanter, characterized in that a means for delaying the rice by a section is provided, and the sun gear is non-rotatably connected to the machine body via a phase adjusting means,
Since each seedling plant attached to a single rotating case can be given the same movement as in the case of a conventional vertically swinging seedling planter, seedlings can be planted to one seedling planting row by multiple seedling plants. This allows high speeds to be achieved without increasing vibration, significantly improving the efficiency of rice planting work.

Moreover, the present invention makes it extremely easy to adjust the amount of seedlings taken out.
Since planting can be done even during operation, there is no need to interrupt the planting operation each time when adjusting the amount of seedlings taken out, and the amount of seedlings taken out can be adjusted remotely, or , i/j It has the effect that it is possible to automatically control the number of seedlings to be taken out to be constant according to the density of seedlings on the seedling mat on the platform.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a side view of the rice transplanter, FIG. 2 is a plan view of the rice transplanter, FIG. 3 is a sectional view of the seedling planting device, and FIG. FIG. 5 is a cross-sectional view from ■-■ of FIG. 3; FIG. 6 is a diagram showing the operating state of FIG. 5; FIG. FIG. 8 is a sectional view taken along the line ■--■ in FIG. 3, FIG. 9 is a diagram showing another embodiment of the seedling planting device, and FIG. 10 is a diagram showing the operating state of FIG. 9. l...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,
13...Phase joint means. Patent applicant Yanmar INki Co., Ltd. 15-

Claims (1)

[Claims] (1) Install a rotating case near the seedling stand that is rotated by power transmission from a power source with its axis substantially horizontal; is provided with a sun gear configured to be freely rotatable with respect to the rotating case, and the rotating case has a plurality of seedling plants provided with dividing claws extending in the direction of the seedling platform at equal positions from the rotation center of the rotating case. is provided rotatably around an axis parallel to the axis of the rotating case, and within the rotating case, a planetary gear is provided at each of the seedling plants, the planetary gear meshing with the sun gear via an intermediate gear; Each of the planetary gears has the same teeth as the sun gear, and each of the planetary gears and the seedling plant is connected by an elastic connecting means, and the intermediate gear and the seedling plant are connected by an elastic connecting means. is provided with a means for delaying the rotation of the seedling plant by a predetermined interval when each seedling plant descends toward the field with the rotation of the rotation case, and further includes a means for delaying the rotation of the seedling plant by a predetermined interval when the seedling plant descends toward the field as the rotating case rotates; 1. A seedling transplanting device for a rice transplanter, characterized in that: is non-rotatably connected to the machine body via a phase adjustment means.