JPH0517811B2 - - Google Patents

Description

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

[Conventional technology]

Conventionally, this type of seedling planting device has been used, for example, in the
As described in Publication No. 27762, the base 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 tips of the cranks fixed to the claw shafts are pivotally attached to the claw shafts, which are rotated by the crank.The rotation of the cranks moves the seedlings up and down so that the tips of the split claws draw long elliptical closed-loop loci in the vertical direction. By configuring it in a crank type manner so that it can be oscillated,
The system is designed so that the seedlings are not damaged when dividing them from the seedling pine, and after the seedlings are planted in the field, the dividing claws quickly escape from the seedlings to stabilize the planting posture of the seedlings.

However, this method had problems such as large vibrations due to its up-and-down movement and slow planting speed.

Therefore, in order to reduce vibrations and improve the planting speed, a so-called rotary seedling planting device, which has a seedling planting body with split claws attached to the outer periphery of a rotating case, has been developed. This method has been proposed in Japanese Patent Publication No. 49-17807, etc.

That is, in this rotary seedling planting device, a rotating case, which is rotationally driven by power transmission from a power source, is arranged on the body near the seedling platform so that it rotates about an axis that is oriented horizontally and horizontally. , a plurality of planting shafts are pivotally supported on the outer periphery of the rotating case in parallel with the axis, and each of the planting shafts is provided with a seedling planting case with a dividing claw, and the dividing claw is connected to the seedling platform. Each of the seedling planting cases is mounted in a position facing toward the side, and a gear train is provided in the rotating case to transmit inconstant rotation to each of the planting shafts as the rotating case rotates. is configured to swing and rotate so that the tip of the split claw in the seedling planting case draws a long elliptical closed loop trajectory in the vertical direction.

[Problem to be solved by the invention]

However, compared to the crank-type seedling planting device, this rotary seedling planting device has the advantage of having less vibration and being able to greatly increase the seedling planting speed. Because of the fast weekly speed, the seedlings that were once planted in the field are often lifted up together with the split claws when the split claws come out of the field, and the reliability of seedling planting is reduced. There was a problem that it was lower than a crank type seedling planting device.

It is an object of the present invention to reliably solve the above problems in a rotary seedling planting device without complicating the structure or increasing the size.

[Means to solve the problem]

In order to achieve this object, the present invention includes a rotating case that is rotatably driven by power transmission from a power source on the machine body near the seedling stand so as to rotate around a substantially horizontal axis, A plurality of planting shafts are pivotally supported on the outer periphery of the rotating case in parallel with the axis line, and each planting shaft is provided with a seedling planting case equipped with a dividing claw, with the dividing claw facing the seedling stand side. Each of the seedling planting cases is mounted in a position facing toward the other side, and a gear train is provided in the rotating case to transmit inconstant rotation to each of the planting shafts as the rotating case rotates. In the seedling planting device, the seedling planting device is configured such that the tip of the splitting claw in the seedling planting case swings and rotates so as to draw a long elliptical closed loop locus in the vertical direction. A pushing tool is provided in each of the seedling planting cases that operates to push out the seedlings divided by the splitting claws toward the tips of the splitting claws, and the pushing tool is provided in each of the seedling planting cases to push out the seedlings as the seedlings are swung and rotated in the seedling planting case. An operating body for operating the tool is provided, and further,
Each of the planting shafts is formed into a hollow shaft, into which a drive shaft for the operating body is inserted, and this drive shaft is fixed to the rotating case, while each of the seedling planting cases and the rotating case In the area between
The structure is such that a removable attachment part is provided for the planting shaft of the seedling planting case.

〔Example〕

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Below, drawings of an embodiment of the present invention in which the present invention is applied to a walking-type two-row rice transplanter will be described.

In the figure, reference numeral 1 designates a float 6 that slides in the field B on the lower surface of a body 5 that also serves as a transmission case, which is equipped with an engine 2 at the front and a seedling stand 3 and a handle 4 at the rear. A rice transplanter is shown in which wheels 7 are mounted on both the left and right sides of the machine body 5 via swing cases 8, and the machine body 5 of the rice transplanter 1 has a rice transplanter mounted in front of the seedling stand 3, which is rotated by power from the engine 2. A driven claw shaft 9 is pivotally supported substantially horizontally, and a rotary seedling planting device 10, which will be described in detail later, is attached to both left and right ends of the claw shaft 9.

As shown in FIGS. 3 to 5, this rotary seedling planting device 10 includes an oval-shaped rotating case 11 that is fitted and fixed to the end of a claw shaft 9 that is pivotally supported on the machine body 5. The rotating case 11 is rotated in the right direction by the claw shaft 9 as shown by an arrow A in a side view of the rice transplanter 1, and a sun gear is mounted on the claw shaft 9 in the rotating case 11. 12 is rotatably fitted, and the sun gear 12 is non-rotatably locked to the body 5 via a suitable rotational phase adjusting means 13.

A drive shaft 14 for a pushing tool (described later) is supported parallel to the claw shaft 9 on the outer periphery of the rotary case 11, that is, on both left and right ends, at positions equidistant from the claw shaft 9. , both drive shafts 14 are fixed to the rotating case 11 in a non-rotatable manner, and the sun gear 12 is mounted on both drive shafts 14.
A planetary gear 15 having the same number of teeth is rotatably fitted. Further, inside the rotating case 11, a claw shaft 9 is provided.
An intermediate shaft 16 is pivotally supported at an intermediate position between the drive shafts 14 and the drive shafts 14, and an intermediate gear 17 that meshes with both the sun gear 12 and the planetary gears 15 is fitted onto the intermediate shafts 16 to form a gear train mechanism. (In this case, the planetary gear 15 may mesh directly with the sun gear 12.)

On the other hand, a hollow planting shaft 18 is rotatably fitted onto both drive shafts 14 in the rotating case 11, and one end of the planting shaft 18 and the driving shaft 14 are projected outside the rotating case 11. The protruding ends of both planting shafts 18 have seedling dividing claws 19 at their tips.
When attaching the hollow seedling planting cases 20 each with the divided claws 19 facing toward the seedling platform 3, the outer periphery of the protruding end of the planting shaft 18 is provided with the following: as shown in FIG. Male thread part 18a
On the other hand, an attachment boss 20a having a female threaded portion 20b on the inner periphery is integrally formed on the side surface of the seedling planting case 20 on the rotation case 11 side,
Female threaded portion 20 within this mounting boss 20a
b is the male threaded portion 18a of the planting shaft 18.
At the same time, by tightening the lock nut 18b previously screwed onto the male threaded portion 18a, each of the seedling planting cases 20 is attached to the respective planting shafts 18. 11. That is, an attachment portion for the planting shaft 18 of the seedling planting case 20 is provided between each of the seedling planting cases 20 and the rotating case 11.

The planetary gears 15 on both drive shafts 14 have pawls 21 projecting toward the planting shaft 18.
The planting shaft 18 is each integrally provided with claws 22 that protrude toward the planetary gear 15, and both claws 21,
22 are configured so that they contact each other when the planetary gear 15 rotates clockwise, and separate from each other when the planetary gear 15 rotates counterclockwise, and between the two pawls 21 and 22, the two pawls 21 and 22 are in contact with each other. A ring-shaped spring body 23 that biases in the corresponding direction is provided, and the ring-shaped spring body 23 is configured to elastically transmit the left rotation of the planetary gear 15 to the planting shaft 18.

On the other hand, each of the seedling planting cases 20 is provided with a hollow guide shaft 27 that extends parallel to the dividing claws 19 and is movable up and down, and a pushing tool 28 is provided at the lower end of the hollow guide shaft 27. A spring 29 is provided inside each of the guide shafts 29 to press and bias the guide shaft 27 downward. A lever-type operating body 30 is disposed inside each of the seedling planting cases 20, one end of which is rotatably pivoted with a pin 31, and the other end 32
is rotatably but non-slidably engaged with the upper end of the guide shaft 27, so that the pushing tool 28 moves up and down as the operating body 30 moves up and down; is inserted into the seedling planting case 20, and the drive shaft 14 inside the seedling planting case 20 has a
The cam 33 is fixed, the middle part of the actuating body 30 is brought into contact with the outer peripheral surface of the cam 33, and the cam 33 is fixed.
The outer circumferential surface of the actuating body 30 is configured to rotate downward only when each of the seedling planting cases 20 approaches its lower limit.

Furthermore, both intermediate shafts 16 in the rotating case 11
A fan-shaped cam 24 is fixed to each of the two, and a stopper arm 25 is integrally provided to both planting shafts 18 in the rotating case 11, so that the seedling planting case 20 On the side facing the seedling stand 3 as it rotates in the direction,
From the height position corresponding to the lower end of the seedling platform 3 (in other words, the position where the rotating case 11 is approximately horizontal) to the position slightly before the lower limit (in other words, the dividing claw 19 has entered the field scene B to a predetermined depth) The stopper arm 25 of the planting shaft 18 comes into contact with the arcuate outer circumferential surface 26 of the cam 24 on the intermediate shaft 16 only in the section where the planting shaft 18 descends to the position). Configure it so that it is delayed.

In this configuration, when the rotating case 11 in the seedling planting device 10 revolves in the direction of arrow A by the claw shaft 9, the seedling planting case 20 attached to the planting shaft 18 fitted on the drive shaft 14 at both ends of the The planting shaft 18, which revolves around the shaft 9 and 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 is connected to the intermediate gear 1.
7 meshes with the sun gear 12, and the sun gear 1
A gear train mechanism is constructed between the sun gear 12 and the planetary gears 15, and the sun gear 12 and the planetary gears 15 have the same number of teeth.
As the rotary case 11 revolves in the direction of arrow A, it rotates about the drive shaft 14 in a direction opposite to the direction of arrow A by the same rotation angle as the rotation angle of the revolution, so both seedlings are planted. The case 20 turns in the direction of arrow A while facing the seedling stand 3, and during this turning movement, when descending from top to bottom on the side facing the seedling stand 3, the tip After dividing only one seedling from the seedling pine on the seedling stand 3 with the dividing claw 19, the tip of the dividing claw 19 enters into the field scene B near the lower limit, and then 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 aligned with the intermediate shaft as shown in FIG. At this point, the seedling planting case 20 stops rotating in the direction opposite to the arrow A, and the seedling planting case 20 moves in the opposite direction to the arrow A. The rotation of the rotating case 11 is delayed relative to the revolution of the rotating case 11 in the direction of the arrow A (however, the rotation of the planetary gear 15
rotates in the opposite direction to arrow A, the claws 21 and 22 separate against the spring body 23, and elastic force is stored in the spring body 23), and the seedling planting case 20 rotates in the direction opposite to the arrow A of the rotating case 11. Along with the revolution in the direction, the dividing claw 19 changes its attitude so as to be substantially perpendicular to the field scene B and enters the field scene B.

When the stopper arm 25 comes off the arcuate outer peripheral surface 26 of the cam 24 as the rotation case 11 revolves in the direction of arrow A, the seedling case 20
Due to the elastic force of the spring body 23, the split claws 19 are rotated back around the planting shaft 14 in the direction opposite to the arrow A, and this return rotation causes the dividing claws 19 to rotate in the rice transplanter 1 after planting the seedlings in the field area B. Since the seedling plant body 20 moves in the opposite direction to the direction of movement, that is, away from the seedlings after planting, leaves the field scene B and rises, and eventually returns to its original position, the movement trajectory of the tip of the split claw 19 at this time As shown by the two-dot chain line in FIG. 7, becomes an elliptical closed loop curve D that is elongated in the vertical direction. A closed loop curve with the same shape as is obtained.

Also, while the rotating case 11 is revolving in the direction of the arrow A, each seedling case 20 rotates in the opposite direction to the arrow A with respect to the drive shaft 14, so that in each seedling case 20, the The lever 33 in contact with the cam 33 rotates in a downward direction based on the shape of the cam 33 when the seedling planting case 20 reaches the lower limit where the tip of the dividing claw 19 enters into the field scene B. With this rotation, the pushing tool 28 at the lower end of the guide shaft 27 descends toward the tip of the dividing claw 19, as shown by the two-dot chain line in FIG. 8, and pushes the seedling into the field area B. When the planting is finished, the split nails 19
Almost at the same time as it leaves the field scene B, the pusher 2
8 returns to its original position (the position shown by the solid line in FIG. 8) from the tip of the dividing claw 19.

Note that in the above embodiment, the cam 24 of the intermediate shaft 16
and the stopper arm 25 of the planting shaft 18,
By delaying the rotation of the seedling plant 20 by the planetary gear 15 with respect to the revolution of the rotating case 11,
Although the case where inconstant speed rotation is transmitted to the planting shaft 18 is shown, instead of this method, as shown in FIGS. A cam gear 24a having a surface 26a and a toothless portion 26b is fixed, and a toothless stopper gear 25a with some teeth cut out on the circumference is provided on the planting shaft 18. In other words, the seedling planting case 20 may be configured to oscillate by transmitting inconstant rotation to the planting shaft 18 as the rotating case 11 rotates. Moreover, the present invention has two seedling cases 2 in one rotating case 11.
Of course, the present invention is applicable not only to cases in which 0 is attached, but also to cases in which three or more seedling planting cases are attached.

[Action/effect of the invention]

As described above, the present invention provides a rotary seedling planting device in which seedlings divided by the dividing claws of the seedling planting case are placed in each of the seedling cases by the dividing claws by the swinging rotation of the seedling case. By providing a push-out tool that operates toward the tip of the blade, it is possible to prevent the seedlings once planted against the field from being lifted up together with the splitting claws that have a high circumferential speed, making it easier to plant seedlings. This can definitely improve reliability.

Furthermore, the planting shaft for attaching the seedling planting case is formed into a hollow shaft, and the driving shaft for the actuating body of the extruder is inserted into the hollow shaft. Compared to the case where the shafts are provided at separate positions, the structure can be simplified and an increase in size can be avoided.

Moreover, the above structure (the planting shaft for attaching the seedling planting case is formed into a hollow shaft, and inside it,
(inserting the drive shaft for the actuating body of the extruder), a removable attachment part for the planting shaft of each seedling case is provided between the seedling case and the rotating case. , since the length of the planting shaft can be made shorter than the length of the drive shaft, the diameter of the planting shaft can be reduced;
This has the effect of reducing weight.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a side view of a rice transplanter, Fig. 2 is a plan view of the rice transplanter, Fig. 3 is a cross-sectional view of the seedling transplanting device, and Fig. 4 is a side view of the rice transplanter. 5 is a cross-sectional view of FIG. 3, FIG. 6 is a diagram showing the operating state of FIG. 5, FIG. 7 is a diagram showing the movement trajectory of the seedling plant, and FIG. 3 is an enlarged cross-sectional view of FIG. 8, and FIG. 9 is a cross-sectional view of FIG.
FIG. 0 is a cross-sectional view taken from FIG. 8, FIG. 11 is a diagram showing another embodiment of the seedling planting device, and FIG. 12 is a diagram showing the operating state of FIG. 11. DESCRIPTION OF SYMBOLS 1... Rice transplanter, 9... Claw shaft, 10... Rotary seedling transplanting device, 11... Rotating case, 12... Sun gear, 14... Drive shaft, 15... Planetary gear, 16...
... Intermediate shaft, 17 ... Intermediate gear, 18 ... Planting shaft, 19 ... Division claw, 20 ... Seedling planting case, 2
1, 22...Claw, 23...Spring body, 24...Cam, 25...Stopper arm, 24a...Cam gear, 25a...Stopper gear, 27...Guide shaft, 28...Pushing tool, 29 ...Spring, 30
...Operating body, 33...Cam, 18a...Male thread part, 20a...Mounting boss, 20b...Female thread part.

Claims (1)

[Claims] 1. A rotating case, which is rotationally driven by power transmission from a power source, is arranged on the machine body near the seedling stand so as to rotate around a substantially horizontal axis, and a plurality of A book planting shaft is supported parallel to the axis, and a seedling planting case equipped with split claws is attached to each of the planting shafts with the split claws facing toward the seedling stand. A gear train is provided in the rotating case to transmit inconstant rotation to each of the planting shafts as the rotating case rotates, and each seedling planting case is connected to the splitting claw of the seedling planting case. In a seedling planting device configured to swing and rotate so that the tip thereof draws a vertically long elliptical closed loop locus, each of the seedling cases is provided with seedlings divided by dividing claws in the seedling case. A pushing tool is provided that operates to push out the seedlings toward the tip of the split claw, and an operating body is provided in each of the seedling planting cases to operate the pushing tool as the seedling planting case swings. Furthermore, each of the planting shafts is formed into a hollow shaft,
A drive shaft for the actuating body is inserted into the interior thereof, and this drive shaft is fixed to the rotating case, while a planting shaft of the seedling planting case is inserted between each of the seedling planting cases and the rotating case. A seedling planting device for a rice transplanter, characterized by having a detachable attachment portion for the rice transplanter.