JP2501086B2 - Seedling plant in rice transplanter - Google Patents

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. . [Prior Art] Conventionally, a seedling planting device of this type has a base end of a seedling plant having a split claw of a seedling at a tip thereof on the machine side, as described in, for example, Japanese Patent Publication No. 49-27762. 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 configuring the tip of the nail to swing up and down so as to draw a locus of a long elliptical closed loop 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 nails quickly escaped from the seedlings to stabilize the planting posture of the seedlings.

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 seedling plant with split claws is attached to the outer peripheral portion of the rotating case is disclosed in, for example, Japanese Patent Publication No. Sho 49-17806. Gazette and Japanese Patent Publication Sho 49-17
As described in Japanese Patent Publication No. 807, etc., a rotating case that is rotationally driven by power transmission from a power source is provided in a machine near a seedling mounting table so as to rotate about a horizontal horizontal axis. Then, a plurality of planting shafts are rotatably supported on the outer peripheral portion of the rotating case in parallel with the axis, and a seedling planting case equipped with split claws is provided on each planting shaft. While being installed in a posture toward the stand side, the seedling planting case is installed in the rotating case in a state in which the seedling planting case is oriented in the direction of the seedling placing table along with the rotation of the rotating case, and is not attached to each planting axis. The seedling planting case is swung so that the tip of the split claw in the seedling planting case draws a locus of an elliptical flat loop that is long in the up-down direction, by providing a non-uniform velocity rotation transmitting means for transmitting the uniform velocity rotation. The rotary type seedling plant that is configured to rotate It is draft.

[0003]

However, in this rotary type seedling planting apparatus, compared with the crank type seedling planting apparatus, there are advantages such as less vibration and a significant increase in seedling planting speed. On the other hand, since the peripheral speed of the tip of the split nail in each seedling planting case is high, the seedlings that should have been planted in the field scene may be lifted together with the split nail when the split nail comes out of the field scene. There was a problem in that the reliability of planting seedlings was lower than that of the crank type seedling planting device.

A technical object of the present invention is to solve the above-mentioned problems in a rotary type seedling planting device without increasing the adhesion of mud to each seedling planting case. Is.

[0005]

In order to achieve this technical object, the present invention provides a "rotating case, which is rotatably driven by power transmission from a power source, to a machine near a seedling stand in a substantially horizontal direction. Is arranged so as to rotate around the axis line, and a plurality of planting shafts are axially supported on the outer peripheral portion of the rotating case in parallel with the axis line, and each planting shaft is provided with a split claw. The case is mounted with the split claws facing the seedling mounting table side, while the rotating case keeps the seedling planting case facing the seedling mounting table in accordance with the rotation of the rotating case. The seedling planting case is provided with an unequal-velocity rotation transmitting means adapted to transmit the unequal-velocity rotation to each planting shaft in such a state that the tip of the dividing claw in the seedling planting case is long in the up-down direction. It is constructed so that it swings and swings to draw the trajectory of a flat loop. In the seedling planting device, the push rod for operating the pusher for pushing the divided seedlings by the split claws in the seedling planting case in the respective seedling planting cases is pushed in the axial direction of the push rod. While freely provided, a drive shaft fixed to the rotary case so as not to rotate is inserted into each of the planting shafts, and a cam is provided on the drive shaft. A lever for reciprocating the push rod by the cam is disposed at the portion. "

[0006]

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.
And a claw shaft 9 that is rotationally driven by the power from the engine 2 is provided on the body 5 of the rice transplanter 1 at a position in front of the seedling mounting table 3 in a substantially horizontal direction. Supported,
Rotary type seedling planting devices 10, which will be described in detail later, are attached to the left and right ends of the claw shaft 9.

This rotary type seedling planting device 10
As shown in FIG. 5 to FIG. 5, there is provided an oval type rotary case 11 fitted and fixed to an end of a pawl shaft 9 pivotally supported on the machine body 5, and the rotary case 11 is planted by the pawl shaft 9. Machine 1
In a side view of the sun gear 12, the sun gear 12 rotates in the right direction, and the sun gear 12 is rotatably fitted on the pawl shaft 9 in the rotating case 11.
2 is an appropriate rotation phase adjusting means 13 for the machine body 5.
Is locked non-rotatably.

At the outer peripheral portion of the rotating case 11, that is, at the left and right ends, at the same distance from the pawl shaft 9,
A drive shaft 14 for an extruding tool (described later) is rotatably supported in parallel with the pawl shaft 9, and both drive shafts 14 are non-rotatably fixed to the rotating case 11 and on the both drive shafts 14. A planetary gear 15 having the same number of teeth as the sun gear 12 is rotatably fitted therein. An intermediate shaft 16 is axially supported in the rotary case 11 at an intermediate position between the pawl shaft 9 and both drive shafts 14, and both the sun gear 12 and the planetary gear 15 are supported on the intermediate shafts 16. The meshing intermediate gear 17 is fitted to form a gear train mechanism (in this case, the planetary gear 15 may be directly meshed with the sun gear 12).

On the other hand, a sleeve-shaped planting shaft 18 is rotatably fitted on both drive shafts 14 in the rotating case 11, and one end of the planting shaft 18 and the drive shaft 14 are fitted.
Of the planting shaft 18
A hollow seedling planting case 20 having a seedling dividing claw 19 at the tip thereof is fixed to each of the projecting ends so that the dividing claw 19 faces the seedling placing table 3 in a posture position.

The planetary gears 15 on both drive shafts 14 have a claw 21 protruding 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 claws 21 and 22 to urge the claws 21 and 22 in a direction in which the claws 21 and 22 come into contact with each other, and the left-handed rotation of the planetary gear 15 is planted by the ring-shaped spring body 23. It is configured to transmit elastically to the shaft 18.

On the other hand, in each of the seedling planting cases 20, a portion outside the drive shaft 14, in other words, a portion deviated from the drive shaft 14 toward the seedling placing table 3 side, is parallel to the split claw 19. A hollow push rod 27 that extends is provided slidably in the axial direction of the push rod 2.
An extruding tool 28 is provided at the lower end of 7, and a spring 29 for urging the push rod 27 downward is provided therein. Further, in each of the seedling planting cases 20, a lever 30 is arranged at a site above the drive shaft 14,
One end thereof is rotatably pivotally attached by a pin 31, while the other end 32 is rotatably attached to the upper end of the push rod 27.
The pusher 28 is configured to move up and down by the non-sliding engagement and the vertical rotation of the lever 30. Further, the drive shaft 14 is inserted into the seedling planting case 20.
A cam 33 is fixed to the drive shaft 14 within 0, and an intermediate portion of the actuating body 30 is brought into contact with the outer peripheral surface of the cam 33.
In addition, the outer peripheral surface of the cam 33 is formed in such a shape that the lever 30 rotates downward only when the seedling planting cases 20 come near the lower limit of their descending.

Further, fan-shaped cams 24 are fixed to both the intermediate shafts 16 in the rotary case 11, while stopper arms 25 are integrally provided in the sleeve-shaped shafts 18 in the rotary case 11. , The seedling plant 20,
A height position corresponding to the lower end of the seedling mounting table 3 on the side facing the seedling mounting table 3 with the rotation of the rotating case 11 in the direction of arrow A (that is, a position where the rotating case 11 is substantially horizontal).
From a position slightly lower than the lower limit of descent (that is, a position where the split claw 19 has entered the field scene B to a predetermined depth), the stopper arm 25 of the sleeve-shaped shaft 18 causes the cam on the intermediate shaft 16 to move. By making contact with the arcuate outer peripheral surface 26 of 24, the left rotation of the sleeve-shaped shaft 18 is delayed only in the above section.

In this structure, when the rotating case 11 of the seedling planting device 10 revolves in the direction of arrow A by the pawl shaft 9, the seedling planting case is attached to the seedling planting shafts 18 fitted on the drive shafts 14 at both ends thereof. Although 20 revolves around the pawl shaft 9, the planting shaft 18 to which the seedling planting case 20 is attached is elastically connected to the planetary gear 15 via a spring body 23, and the planetary gear 15 connects the intermediate gear 17 with the intermediate gear 17. The sun gear 12 is meshed with the sun gear 12 via a gear train mechanism, and the sun gear 12 and the planetary gear 15 have the same number of teeth. Connecting planting shaft 18
Is rotated about the drive shaft 14 in the direction opposite to the arrow A direction by the same rotation angle as the revolution angle of the rotation case 11 when the rotation case 11 revolves in the direction of arrow A. The case 20 turns in the direction of arrow A in the state of facing the seedling placing table 3, and during this turning movement, when descending from the top to the bottom on the side facing the seedling placing table 3, the tip end After splitting only one seedling from the seedling mat on the seedling mounting table 3 with the split claw 19, the tip of the split claw 19 penetrates into the field scene B in the vicinity of the lower limit of descending, and then from the field scene B. It will rise.

In this case, when the rotating case 11 is in a substantially horizontal state, the stopper arm 25 of the planting shaft 18 of the seedling planting case 20 on the side facing the seedling stand 3 is, as shown in FIG. By contacting the arc-shaped outer peripheral surface 26 of the cam 24 on the intermediate shaft 16 and stopping rotation of the seedling planting case 20 in the direction opposite to the arrow A from this point, the seedling planting case 20 is rotated in the opposite direction to the arrow A. Rotation case 11
Is delayed with respect to the revolution in the direction of arrow A (however, the planetary gear 15 rotates in the direction opposite to the direction of arrow A, separates the pawls 21 and 22 against the spring body 23, and is elastic to the spring body 23). Force is stored), and the posture of the seedling planting case 20 is changed so that the split claws 19 thereof are substantially vertical to the field scene B as the rotating case 11 revolves in the direction of arrow A. Break into B.

When the stopper arm 25 disengages from the arc-shaped outer peripheral surface 26 of the cam 24 as the rotating case 11 revolves in the direction of arrow A, the seedling planting case 20 is moved in the direction opposite to arrow A by the elastic force of the spring body 23. Is rotated back around the planting shaft 14, and this return rotation causes the split claw 19
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, the Japanese Patent Publication No. 49-27762. A closed loop curve having the same shape as in the case of the crank type seedling planting device described in Japanese Patent Publication (KOKAI) is obtained.

That is, both seedling planting cases 20 here
When the split claw 19 descends toward the field scene B while holding the seedling, the posture is changed vertically and enters the field scene B,
When the child leaves the field scene B after planting, it rises while escaping away from the seedling after planting, so that the planting of the seedling in the field scene B can be reliably performed under the correct posture.

While the rotating case 11 revolves in the direction of arrow A, each seedling planting case 20 rotates about the planting shaft 14 in the direction opposite to the arrow A, so that each seedling planting case 2 is rotated.
The lever 30 that abuts the cam 33 on the planting shaft 14 at 0 is based on the shape of the cam 33 when the seedling planting case 20 reaches the lower limit of lowering where the tip of the split claw 19 enters the field B. Since it rotates downwards, the pusher 28 at the lower end of the push rod 27 descends toward the tip of the split claw 19 as shown by the chain double-dashed line in FIG. Planting is carried out by pushing it into the field scene B. When this pushing and planting is completed, the pushing tool 28 is retracted from the tip of the splitting claw 19 almost at the same time when the split claw 19 comes out of the field scene B. It returns to the position shown by the solid line in FIG.

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 to transmit non-constant 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 arc-shaped outer peripheral surface 26a and a toothless portion 26b is fixed on a part of the circumference, while on the planting shaft 18. Has a toothless stopper gear 2 with a part of the circumference notched.
5a may be provided so that the same operation as described above is performed, that is, non-constant speed rotation is transmitted to the planting shaft 18 as the rotating case 11 rotates. The invention is not limited to the case in which the two seedling planting cases 20 are mounted on the single rotating case 11, and it is needless to say that the invention can be applied to the case where three or more seedling planting cases are mounted.

[0019]

INDUSTRIAL APPLICABILITY As described above, according to the present invention, in the rotary type seedling planting apparatus, the seedlings divided by the dividing claws in the seedling planting case are used in the respective seedling planting cases. By providing the pushing tool that pushes and works toward the tip of the split claw by swinging and swinging, it is possible to prevent the seedling once planted in a field scene from being lifted up together with the split claw having a high peripheral speed. , The reliability of planting seedlings can be greatly improved.

Further, since the lever for activating the pushing tool is arranged in a portion above the drive shaft in the seedling planting case, the lever between the lower surface of the seedling planting case and the split claw is provided. Since it is wider than when it is placed below the drive shaft, it is possible to significantly reduce the adhesion of mud in the field scene to the lower surface side of this seedling planting case, and the operation due to the adhesion of mud The occurrence of defects can be reduced and the durability can be increased.

Furthermore, by inserting the drive shaft into the planting shaft, the structure can be simplified and the size can be reduced as compared with the case where the planting shaft and the drive shaft are provided at different positions.

[Brief description of drawings]

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

FIG. 2 is a plan view of a rice transplanter.

FIG. 3 is a cross-sectional view of a seedling planting device.

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;

5 is a 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 an enlarged sectional view taken along line VIII-VIII of FIG.

9 is a sectional view taken along line IX-IX in FIG.

FIG. 10 is a diagram showing another embodiment of the seedling planting device.

FIG. 11 is a diagram showing an operation state of FIG. 10;

[Explanation of symbols]

 1 rice transplanter 3 seedling mount 9 claw shaft 10 seedling planting device 11 rotating case 12 sun gear 14 drive shaft 15 planetary gear 16 intermediate shaft 17 intermediate gear 18 planting shaft 19 split claw 20 seedling case 21,22 claw 23 spring body 24 Cam 25 Stopper arm 24a Cam gear 25a Stopper gear 27 Push rod 28 Extruder 29 Spring 30 Lever 33 Cam

Claims (1)

(57) [Claims] 1. A rotating case, which is rotationally driven by power transmission from a power source, is arranged on a machine body near the seedling mounting table so as to rotate about an axis of a substantially horizontal lateral direction, and an outer periphery of the rotating case. Part, a plurality of planting shafts are axially supported in parallel with the axis, and a seedling planting case equipped with split claws is attached to each planting shaft in a posture in which the split claws face the seedling table. On the other hand, in the rotating case, the non-constant rotation is transmitted to each planting axis in a state in which the seedling planting case keeps a posture facing the direction of the seedling mounting table along with the rotation of the rotating case. By providing the non-uniform speed rotation transmission means,
In a seedling planting device configured to swing and rotate so that the tips of the split claws in the seedling planting case draw a locus of an elliptical flat loop that is long in the vertical direction, A push rod for actuating the pushing tool for split seedlings by the split claws in the case to push the split seedlings in the direction of the tip of the split claws is provided slidably in the axial direction, while in each of the planting shafts, in the rotating case. On the other hand, a non-rotatably fixed drive shaft is inserted, and a cam is provided on this drive shaft, and a lever for reciprocally operating the push rod by the cam at a position above the drive shaft in the seedling planting case. The seedling planting device in the rice planting machine.