JP2550293B2 - 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. .

[0002]

2. Description of the Related Art Conventionally, this kind of seedling planting apparatus has, as described in, for example, Japanese Patent Publication No. 49-27762, attaches the base end of a seedling plant having a divided claw of a seedling to a tip thereof on an airframe side. While being connected via an agitation link, the middle of the seedling is pivotally connected to the tip of a crank fixed to a claw shaft that is driven to rotate by an engine, and the rotation of the crank separates the seedling. By constructing 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, and the seedling is split after planting in the field scene The nails quickly escaped from the seedlings to stabilize the planting posture of the seedlings.

[0003] However, this crank type seedling planting apparatus has problems such as large vibrations due to its vertical swing and a low planting speed. Therefore, in order to reduce the vibration and improve the planting speed, a so-called rotary seedling plant in which a seedling case with split claws is attached to the outer periphery of the rotary case is disclosed in, for example, Japanese Patent Publication No. Sho 49-17806. And Japanese Patent Publication No. 49-17807.

[0004]

However, in this rotary seedling plant, the seedling case is swung so that the tip of the split claw draws a locus of an elliptical closed loop that is long in the vertical direction. A mechanism is required, and conventionally, this swinging rotation is performed by a crank mechanism provided between a planting shaft to which the seedling case with split claws is attached and a rotation transmitting mechanism for the planting shaft. Make up. However, if the mechanism for swinging and swinging the seedling case is a crank mechanism, the torque variation is large, so the planting posture of the seedling with respect to the field scene is unstable, and the vibration is sufficiently reduced. However, there is a problem that the durability is low.

Further, in the rotary type seedling planting apparatus described in Japanese Patent Publication No. 49-17806, Japanese Patent Publication No. 49-17807, etc., the swinging of the seedling planting case is relatively vigorous. Regardless, the planting shaft to which this seedling planting case is attached is configured so that the planting shaft is supported with respect to the rotating case only at the place where the planting shaft penetrates the rotating case. However, there is also a problem in that the durability is low in this part because it easily occurs.

[0006] It is a technical object of the present invention to solve the above-mentioned various problems at once in a rotary type seedling planting device without complicating the structure and increasing the size thereof.

[0007]

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. Are arranged so as to rotate about the axis of the rotation case, and planting shafts parallel to the axis are rotatably supported at a plurality of positions on a circumference around the axis in the rotating case, and each of the plantings is A seedling case with split claws on the axis,
In a seedling planting device in which the split claws are mounted in a posture toward the seedling mounting table side, in the rotating case, non-constant rotation is transmitted to each of the planting shafts as the rotating case rotates. By providing a gear train made to,
The tip of the split claw in the seedling planting case is configured to swing and rotate so as to draw a locus of an elliptical closed loop that is long in the vertical direction, while the planting shaft is configured as a hollow shaft.
The planting shaft of the hollow shaft is rotatably fitted to a support shaft fixed to the rotating case so that the planting shaft is supported by both the supporting shaft and the rotating case. "."

[0008]

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,
At both left and right ends of the claw shaft 9, a rotary seedling planting device 10, which will be described in detail later, is mounted.

This rotary seedling plant 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.

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 support shaft 14 for an extruding tool (which will be described later) is axially supported in parallel with the pawl shaft 9, and both support shafts 14 are non-rotatably fixed to the rotating case 11 and are mounted on both support 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 pivotally supported in the rotary case 11 at an intermediate position between the pawl shaft 9 and both support shafts 14, and both the sun gear 12 and the planetary gear 15 are supported on the intermediate shafts 16. By fitting the meshing intermediate gear 17, the respective gears 12, 17, 15 and the cam gear 24a and the tooth-chipped stopper gear 25a, which will be described later, cause the support shafts 14 to rotate as the rotation case 11 rotates. A gear train adapted to transmit a non-constant speed rotation to a hollow planting shaft 18 (to be described later) fitted to the (in this case, the planetary gear 15 is directly meshed with the sun gear 12). Is also good).

On the other hand, a hollow shaft planting shaft 18 is rotatably fitted on both support shafts 14 in the rotary case 11, and one end of the planting shaft 18 is pivotally supported by the rotary case 11. At the projecting end, a hollow seedling planting case 20 having a splitting claw 19 for seedlings at the tip thereof is provided at the posture position where the splitting claw 19 faces the seedling table 3. Stick to it.

The planetary gears 15 on the two support shafts 14 have pawls 21 projecting toward the planting shafts 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, each of the seedling planting cases 20 is provided with a hollow guide shaft 27 extending in parallel with the split claw 19 so as to be vertically movable, and a lower end of the hollow guide shaft 27 is
The pusher 28 is provided with a spring 29 therein for urging the guide shaft 27 downward. Also,
A lever-type actuating body 30 is arranged in each of the seedling planting cases 20, and one end of the actuating body 30 is rotatably pivoted by a pin 31, while the other end 32 is pivoted on the upper end of the guide shaft 27. It is configured so that it can be freely slidably engaged and the push-out tool 28 moves up and down by the vertical rotation of the actuating body 30, and further, the support shaft 14 is inserted into the seedling planting case 20, A cam 33 is fixed to the support shaft 14 in the seedling planting case 20,
An intermediate portion of the operating body 30 is brought into contact with the outer peripheral surface of the cam 33, and the outer peripheral surface of the cam 33 is attached to each of the seedling cases 2.
The operating body 30 is configured to rotate downward only when 0 comes close to its lower limit.

Further, both of the intermediate shafts 16 in the rotating case 11 have a circular arc-shaped outer peripheral surface 26a and a toothless portion in a part of the circumference at a portion on the opposite side of the machine body 5 on the left and right sides of the intermediate gear 17. Cam gear 24a having a portion 26b
(Large Diameter) is fitted, and the toothless stopper gear 25a (Small Diameter), which is partially cut off on the circumference, is attached to the both mounting shafts 18 in the rotating case 11. The gear 25a is fitted so as to mesh with the cam gear 24a, and the seedling case 20 is placed 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 below the lower limit from the height position corresponding to the lower end of the base 3 (that is, the position where the rotating case 11 is substantially horizontal) (that is, the position where the split claw 19 has entered the field scene B to a predetermined depth) In the section descending to the intermediate shaft 16, the arc-shaped outer peripheral surface 26 a of the cam gear 24 a of the intermediate shaft 16 is connected to the toothless stopper gear 2 of the planting shaft 18.
By contacting the missing tooth portion in 5a, the left rotation of the planting shaft 18 is delayed in the 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 planting shaft 1 fitted on the support shafts 14 at both ends thereof.
8, the seedling case 20 revolves around the claw 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 gear 15 meshes with the sun gear 12 via the intermediate gear 17,
The sun gear 12 and the planetary gear 15 have the same number of teeth, and the planetary gear 15 and the planting shaft 1 connected thereto are connected.
8 rotates about the support 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 it revolves in the direction of arrow A. The planting case 20 turns in the direction of arrow A while 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, After splitting only one seedling from the seedling mat on the seedling mounting table 3 with the split claw 19 at the tip, the tip of the split claw 19 penetrates into the field scene B in the vicinity of the lower limit of descent, and thereafter the field scene B. It will rise more.

In this case, when the rotating case 11 is in a substantially horizontal state, in the seedling planting case 20 on the side facing the seedling placing table 3, the arc-shaped outer peripheral portion 26a of the cam gear 24a of the intermediate shaft 16 is shown in FIG. As shown in FIG. 3, one end of the tooth portion of the toothless stopper gear 25a of the planting shaft 18 comes into contact with the seedling planting case 20, and rotation of the seedling planting case 20 in the direction opposite to the arrow A stops from this point, whereby the seedling planting is stopped. The rotation of the case 20 in the direction opposite to the arrow A is delayed with respect to the revolution of the rotating case 11 in the direction of the arrow A (however, the planetary gear 15 rotates in the direction opposite to the arrow A to rotate the pawls 21 and 22). Is separated against the spring body 23, and elastic force is stored in the spring body 23), and the split claw 19 of the seedling planting case 20 revolves in the direction of the arrow A of the rotating case 11 so that the split claw 19 thereof is in the field scene B. The posture is changed so that it becomes almost vertical with respect to Entering the plane B.

As the rotating case 11 revolves in the direction of arrow A, the tooth portion of the large-diameter cam gear 24a on the intermediate shaft 16 is replaced by the tooth portion of the small-diameter toothless stopper gear 25a on the planting shaft 18. , The planting shaft 18 rotates at a faster speed than the intermediate shaft 16 based on the diameter ratio between the large-diameter cam gear 24a and the small-diameter toothless stopper gear 25a. Axis 18
The seedling planting case 20 attached to the support shaft 1 is mounted in the direction opposite to the arrow A.
4, the split claw 19 is rotated in the opposite direction to the traveling direction of the rice transplanter 1 after planting the seedlings in the field B, that is, while moving away from the seedlings after planting. It escapes from B and rises, and eventually the seedling planting case 20 returns to the original posture. At this time, the split claw 1
The locus of movement of the tip of 9 is an elliptical closed loop curve D which is long in the up-and-down direction, as shown by the chain double-dashed line in FIG. A closed loop curve with the same shape as that of the planting device will be 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.

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.
At 0, the lever 33 which comes into contact with the cam 33 on the planting shaft 14 is based on the shape of the cam 33 when the seedling case 20 comes to the lowermost lower limit where the tip of the divided claw 19 enters the field scene B. 8, the pusher 28 at the lower end of the guide shaft 27 descends toward the tip of the split claw 19 as shown by a two-dot chain line in FIG.
Planting is performed by pushing the seedlings into the field scene B, and when this pushing and planting is completed, the push-out tool 28 is retracted from the tip of the split claw 19 almost at the same time as the split claw 19 comes out of the field scene B. It returns to (the position shown by the solid line in FIG. 8).

The present invention is not limited to the case where the two seedling planting cases 20 are mounted on the single rotating case 11, but it is needless to say that the present invention can be applied to the case where three or more seedling planting cases are mounted.

[0021]

As described above, according to the present invention, the gear train is provided in the rotating case so as to transmit the non-constant speed rotation to each planting shaft according to the rotation of the rotating case,
Since the seedling planting case with split claws is pivoted so that the tip of the split claws in the seedling planting case draws a locus of an elliptical closed loop that is long in the up-down direction, the conventional rotary seedling planting device As described above, as compared with the case where the seedling planting case is pivotally rotated through the crank mechanism, the torque fluctuation when the seedling planting case is pivotally rotated and vibration can be reduced.

Moreover, the planting shaft to which the seedling planting case which pivots as described above is attached is a hollow shaft, and the planting shaft of this hollow shaft is attached to the support shaft fixed to the rotating case. Since the planting shaft is rotatably fitted so as to be pivotally supported by both the support shaft and the rotating case, the planting shaft penetrates the rotating case with respect to the rotating case as in the conventional case. It can be supported very strongly by both the support shaft and the rotating case, as compared with the case where the shaft is supported only at the place where it is supported.

Therefore, according to the present invention, since the torque fluctuation and the vibration when swinging the seedling planting case is small, the seedling planting posture with respect to the field is greatly stabilized and the durability is improved. Although it can be achieved, there is an effect that the bearing portion for the planting shaft to which each seedling planting case is attached is less likely to rattle and the durability of the portion can be greatly improved.

[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 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 an enlarged sectional view taken along line VIII-VIII of FIG.

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

[Explanation of symbols]

 1 rice transplanter 3 seedling mounting table 9 claw shaft 10 rotary type seedling planting device 11 rotary case 12 sun gear 14 support 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 24a Cam gear 25a Partial tooth type stopper gear

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 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 centered on the axis, a planting shaft parallel to the axis is rotatably supported, and each planting shaft has a seedling planting case with a split claw, the split claw being In a seedling planting device that is mounted in a posture toward the seedling mounting table side, a gear train that transmits non-constant rotation to each of the planting shafts in the rotating case as the rotating case rotates. By providing the seedling planting case, while swinging the tip of the split claws in the seedling planting case so as to draw a locus of a long elliptical closed loop in the vertical direction ,
The hollow shaft is used as the planting shaft, and the hollow shaft is planted.
Attach the shaft to the support shaft fixed to the rotating case.
The shaft is supported by both the support shaft and the rotating case.
NaeUe device in rice transplanter, wherein rotatably it has fitted into.