JP2600054B2 - 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 seedling plant for dividing rice plants one by one from a seedling mat on a seedling mounting table in a rice transplanter and then planting the seedlings in a field. .

[0002]

2. Description of the Related Art Conventionally, this kind of seedling planting apparatus is, for example, as described in Japanese Patent Publication No. 49-27762, in which the base end of a seedling planting case having a split claw of a seedling at the tip is attached to the body side. While being connected via an agitating link, the middle of the seedling case is pivotally connected to the tip of a crank fixed to a claw shaft driven by an engine, and the rotation of the crank divides the seedling case into parts. By configuring the tip of the nail to swing up and down so as to draw a long elliptical closed loop trajectory in the vertical direction, the seedling is not damaged when the seedling is split from the seedling mat,
After planting the seedlings in the field, the split claws quickly escaped from the seedlings, stabilizing the planting posture of the seedlings,
This crank-type seedling plant has problems that vibration is remarkably large due to its vertical swing, and that the planting speed is slow.

[0003] In order to reduce the vibration and increase the planting speed, for example, Japanese Patent Publication No. Sho 49-17806.
As described in Japanese Unexamined Patent Publication (Kokai) No. Sho-49-17807, etc., a rotating case driven by power transmission from a power source is mounted on an airframe near a seedling mounting table around a substantially horizontal horizontal axis. A plurality of planting shafts are respectively supported on the outer peripheral portion of the rotating case in parallel with the axis line, and each planting shaft has a seedling planting case provided with a split claw. A mechanism in which the split claws are mounted in such a manner as to face the seedling mounting table, respectively, and a non-uniform rotation is transmitted to the planting shafts in the rotating case with the rotation of the rotating case. A rotating seedling that is configured to swing each of the seedling cases so that the tips of the split claws in the seedling case draw a vertical elliptical closed-loop trajectory. A device has been proposed.

[0004]

However, in this rotary seedling plant, the peripheral speed of the tip of the split claw in the seedling case is much faster than that of the crank type seedling plant. Seedlings that should have been planted on the surface, when the split claws fall out of the field scene, frequently occur with the split claws, so the certainty of planting the seedlings is lower than the crank type seedling planting device There was a problem to say.

SUMMARY OF THE INVENTION It is a technical object of the present invention to provide a rotary seedling-planting apparatus that reliably solves the above-mentioned problems of the conventional apparatus by using a highly durable configuration.

[0006]

In order to achieve this technical object, the present invention relates to a method of manufacturing a vehicle in which a rotating case driven by power transmission from a power source is mounted on a body near a seedling mounting table in a substantially horizontal orientation. A plurality of planting shafts are respectively supported on the outer peripheral portion of the rotating case in parallel with the axis, and each planting shaft has a split claw. The planting case is mounted in such a manner that the split claws are directed toward the seedling mounting table side, and in the rotating case, the unequal-speed rotation is transmitted to the planting shafts with the rotation of the rotating case. A seedling plant, wherein each seedling case is swung and swung so that the tip of a split claw in the seedling case draws a locus of an elliptical closed loop that is long in the vertical direction. In the apparatus, each of the seedling cases is attached to each of the seedling cases. The extrusion tool in which the divided seedlings to push toward the front end of the split nail in split nail in scan provided, further, in said each seedling planting case, the NaeUe cable
The extruder moved forward with the swing of
Then, the cam configured to move backward is
Fixed so that it cannot rotate with respect to the "
did.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below with reference to the drawings in which the embodiments are applied to a walking type two-row rice transplanter.
In the drawing, reference numeral 1 designates a transmission case body 5 having an engine 2 at the front and a seedling mounting table 3 and a handle 4 at the rear.
A float 6 is provided on the lower surface of the vehicle for sliding in a field scene B.
And a claw drive shaft 9, which 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 table 3. At the left and right ends of the claw drive shaft 9, a rotary seedling plant 10, which will be described in detail later, is mounted.

The rotary seedling plant 10 is shown in FIGS.
As shown in FIG. 1, an oval-shaped rotary case 11 is fitted and fixed to an end of a claw drive shaft 9 supported on the machine body 5. As shown by an arrow A in a side view, it rotates rightward, and a sun gear 12 is rotatably fitted on the claw drive shaft 9 in the rotating case 11, and the sun gear 1
2 is an appropriate rotation phase adjusting means 13 for the machine body 5.
Is locked non-rotatably.

A drive shaft 14 for an extruder (described later) is provided on the outer peripheral portion of the rotary case 11, that is, on both left and right end portions, at positions where the distance from the claw drive shaft 9 is equal. The two drive shafts 14 are supported in parallel, and both drive shafts 14 are non-rotatably fixed to a side plate 11 a of the rotating case 11 opposite to a seedling case 20, which will be described later.
Planet gears 15 having the same number of teeth as the sun gear 12 are rotatably fitted on the two drive shafts 14.

In the rotary case 11, an intermediate shaft 16 is supported at an intermediate position between the pawl drive shaft 9 and both drive shafts 14, and the sun gear 12 and the planetary gear 15
An intermediate gear 17 meshing with both of them is fitted to form a gear train mechanism (in this case, the planetary gear 15 may directly mesh with the sun gear 12). On the other hand, a hollow 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 driving shaft 14 are projected outside the rotating case 11. At the protruding ends of both planting shafts 18, hollow seedling case 20 provided with splitting claws 19 for seedlings at the tips are fixed to the seedling mounting table 3 in such a position that the split claws 19 face the seedling mounting table 3, respectively. .

The planetary gears 15 on the two drive shafts 14 have pawls 21 projecting toward the planting shafts 18.
A claw 22 protruding toward the planetary gear 15 is integrally provided on the planting shaft 18, and the claws 21 and 22 are brought into contact with each other when the planetary gear 15 rotates clockwise, so that the planetary gear 15
Are configured to separate from each other when they rotate to the left,
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, each seedling case 20 is provided with a hollow guide shaft 27 extending in parallel with the dividing claws 19 so as to be movable up and down.
The pusher 28 is provided with a spring 29 therein for urging the guide shaft 27 downward. That is, the spring 29 is provided at a position where the axis of the spring 29 is substantially aligned with the axis of the pusher 28 in the operating direction.

A swing lever 30 is disposed in each seedling case 20 and its base end is rotatably pinned at a position opposite to the guide shaft 27 across the drive shaft 14. While pivotally connected at 31, the other end 32 of the swing lever 30 is rotatably and non-slidably engaged with the upper end of the guide shaft 27. The extruder 28 is configured to move up and down. Further, the drive shaft 14 is inserted into the seedling case 20, and a cam 33 is fixed to the drive shaft 14 in the seedling case 20. When the swing lever 30 is brought into contact with the outer peripheral surface of the cam 33, the outer peripheral surface of the cam 33 is brought close to the lower limit of the lowering of the seedling cases 20 with the rotation of the rotating case 11. The swing lever 30 is turned downward by the urging force of the spring 29. Then, when each seedling case 20 rises away from the field scene B with the rotation of the rotating case 11, the rocking lever 30 is configured to rotate upward against the spring 29. I do.

Further, fan-shaped cams 24 are respectively fixed to both intermediate shafts 16 in the rotating case 11, and both sleeve-shaped planting shafts 18 in the rotating case 11 are
Stopper arms 25 are provided integrally with each other, and the seedling case 20 corresponds to the lower end of the seedling table 3 on the side facing the seedling table 3 with the rotation of the rotating case 11 in the direction of arrow A. A position slightly before the lower limit of lowering from the height position (that is, the position where the rotating case 11 becomes substantially horizontal) (that is,
The position where the split claw 19 has entered the field scene B to a predetermined depth)
The stopper arm 25 of the sleeve-shaped planting shaft 18 abuts on the arc-shaped outer peripheral surface 26 of the cam 24 on the intermediate shaft 16 only in the section descending to the left, so that the planting shaft 18 rotates left only in the section described above. Is configured to be delayed.

In this configuration, when the rotating case 11 of the seedling plant 10 revolves in the direction of arrow A by the claw drive shaft 9, the seedling case attached to the planting shaft 18 fitted to the drive shaft 14 at both ends thereof. 20 revolves around the claw drive shaft 9, and the planting shaft 18 to which the seedling case 20 is attached.
Is elastically connected to the planetary gear 15 via a spring 23, and the planetary gear 15 is connected to the sun gear 12 via the intermediate gear 17.
To form a gear train between the sun gear 12 and the sun gear 12 and the planetary gear 15 having the same number of teeth, and the planetary gear 15 and the planting shaft 18 connected thereto. Is caused by the rotation of the rotating case 11 in the direction of arrow A by the same rotation angle as the rotation of the arrow A.
Since both the seedling cases 20 rotate in the direction opposite to the direction around the drive shaft 14, the two seedling cases 20 rotate in the direction of the arrow A in a state facing the seedling mounting table 3, and this rotating movement is performed. In the middle, when descending from the upper side to the lower side on the side facing the seedling mounting table 3, the seedling mat 19 on the tip divides the seedling by only one plant from the seedling mat on the seedling mounting table 3, and the vicinity of the lower lower limit thereof At the tip of the split claw 19 penetrates into the field scene B,
After that, it rises from the field scene B.

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 case 20 on the side facing the seedling mounting table 3 is moved to the position shown in FIG.
As shown in FIG. 5, the seedling case 20 stops rotating in the direction opposite to the arrow A of the seedling case 20 at this point by contacting the arc-shaped outer peripheral surface 26 of the cam 24 on the intermediate shaft 16. The rotation in the direction opposite to the arrow A of FIG.
(The planetary gear 15 rotates in the direction opposite to the arrow A, and the pawls 21 and 22 are separated from each other against the spring body 23, and the spring body 23 has elasticity.) The power is stored), and as the rotating case 11 revolves in the direction of arrow A, the posture of the seedling case 20 is changed so that the divided claws 19 are substantially perpendicular to the field scene B, and Invades B.

When the stopper arm 25 is disengaged from the arcuate outer peripheral surface 26 of the cam 24 with the rotation of the rotating case 11 in the direction of arrow A, the seedling case 20 is moved in the direction opposite to arrow A by the elastic force of the spring body 23. Is rotated around the planting shaft 14, and this return rotation causes the split claws 19 to rotate.
After the seedlings are planted in the field scene B, the seedlings rise 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 case 2
Since 0 returns to the original posture, the movement trajectory of the tip of the split claw 19 at this time becomes a closed loop curve D having an elliptical shape elongated in the vertical direction as shown by a two-dot chain line in FIG. A vertically long elliptical closed loop curve having the same shape as that of the crank type seedling planting apparatus described in JP-A-49-27762 is obtained.

That is, the two seedling plant 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.

During the rotation of the rotating case 11 in the direction of the arrow A, each seedling case 20 rotates in the direction opposite to the arrow A with respect to the drive shaft 14 so that each seedling case 20 is rotated.
When the seedling case 20 has reached the lower limit of lowering where the tip of the split claw 19 enters the field scene B, the swinging lever 30 that contacts the cam 33 on the drive shaft 14 is pressed by the spring 29. As a result, the pusher 28 at the lower end of the guide shaft 27 causes the pusher 28 at the lower end of the guide shaft 27 to rotate as shown by a two-dot chain line in FIG.
The seedlings are planted in such a manner that they are pushed forward into the field scene B, and the push-in tool 28 is almost simultaneously with the split claw 19 coming out of the field scene B when the pushing and planting is completed. Based on the shape of the cam 33, it retreats from the tip of the split claw 19 against the spring 29 and returns to the original position (the position indicated by the solid line in FIG. 8).

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, the rotation of the seedling case 20 by the planetary gear 15
By delaying for one revolution, the planting axis 18
In this case, the intermediate rotation is transmitted to the intermediate shaft 16 as shown in FIGS. 10 and 11. A cam gear 24a having a portion 26b and
On the upper side, there is provided a toothless stopper gear 25a in which a part of the circumference of the tooth is cut out, so that the same operation as described above is performed. That is, the stopper gear 25a is attached to the planting shaft 18 with the rotation of the rotating case 11. The present invention may be configured to transmit non-uniform rotation. In addition, the present invention is not limited to the case in which two seedling cases 20 are attached to one rotating case 11, but three or more seedling cases. It is needless to say that the present invention can be applied to the case of mounting.

[0021]

As described above, according to the present invention, in the rotary seedling plant, the push-out tool which is operated by swinging the swing is provided in the split claw of each seedling case. It is possible to prevent the seedling once planted in the field scene from being lifted together with the split claws by the pushing tool.

By the way, Japanese Patent Publication No. 49-17807, which is a prior art of the present invention, discloses that a split nail in each seedling case is a pair of left and right split nails.
It is configured to open and close laterally to release the planted seedlings,
By simply opening both split nails, the seedling split with both split nails can be
There is a possibility that the seedlings may be lifted together with one of the split nails without being able to be securely separated from both split nails.

On the other hand, according to the present invention, the division
Push the seedlings that have been
The seedlings can be released without fail,
The reliability of planting seedlings on the surface
It can be significantly improved. Moreover, each seedling
The planting case turns into the seedling planting case by rotating the rotating case.
The tip of the split claw in the oval closed loop is long in the vertical direction
Because it swings and swings to draw a movement trajectory,
The extrusion tool provided in the split nail in the respective seedling planting case
The cam for moving backward after moving forward
Pushed out by being fixed to the case so that it cannot rotate.
The timing when the tool is moved forward and backward,
The rotation phase of the rotating case, and thus each seedling case
To the movement trajectory of the split claw
At the same time, when the pushing tool is moved forward and backward,
Between the rotation timing and the rotation phase of the rotating case.
This has the effect of reliably reducing the occurrence of cracks.

[Brief description of the drawings]

FIG. 1 is a side view of a rice transplanter according to an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a cross-sectional view of a seedling plant according to an embodiment of the present invention.

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

FIG. 5 is a sectional view taken along line VV of FIG. 3;

FIG. 6 is a diagram showing an operation state of FIG. 5;

FIG. 7 is a diagram showing a locus of movement of a seedling case.

FIG. 8 is an enlarged sectional view taken along line VIII-VIII of FIG. 3;

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

FIG. 10 is a view showing another seedling plant according to the present invention.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rice transplanter 9 Claw drive shaft 10 Rotary seedling plant 11 Rotating case 12 Sun gear 15 Planetary gear 16 Intermediate shaft 17 Intermediate gear 18 Planting shaft 19 Split claw 20 Seedling case 24 Cam 25 Stopper arm 24a Cam gear 25a Stopper gear 27 Guide shaft 28 Extruder 33 Cam

Claims (1)

(57) [Claims] 1. A rotating case, which is rotatably driven by power transmission from a power source, is arranged on an airframe near a seedling mounting table so as to rotate about a substantially horizontal horizontal axis. A plurality of planting shafts, each of which is pivotally supported in parallel with the axis, and each planting shaft is provided with a seedling planting case having split claws, with the split claws facing the seedling table side. While each is mounted, a mechanism is provided in the rotating case so as to transmit unequal speed rotation to each of the planting axes with the rotation of the rotating case. In a seedling plant configured so that the tip of a split claw in a case swings and swings so as to draw a locus of an elliptical closed loop that is long in the vertical direction, in each of the seedling cases,
An extruding tool is provided for extruding the seedlings split by the split claws in the seedling case toward the tips of the split claws , and further, a neck of the seedling case is provided in each of the seedling cases.
After the push-out tool moves forward with swinging rotation
A cam that is configured to retract is attached to the rotating case.
A seedling plant in a rice transplanter, wherein the seedling plant is fixed so as not to rotate .