JP2634581B2 - Seedling plant in rice transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a rice transplanter,
The present invention relates to a rotating seedling plant having two seedlings in one rotating case.

[0002]

2. Description of the Related Art Japanese Patent Publication No. 49-1780 as prior art
No. 6, JP-B-49-17807 and JP-B-4
Japanese Patent Application Laid-Open No. 9-17808 discloses a rotary seedling device of this type, in which a claw drive shaft that is rotationally driven by power transmission from a power source is supported on a body near a seedling mounting table in a substantially horizontal lateral direction, In the rotating case mounted on the claw drive shaft, planting axes are respectively supported in parallel with the claw drive shaft at portions on both left and right sides of the claw drive shaft. The seedlings provided with are mounted in a posture toward the seedling mounting table side, and in the rotating case, unequal speed rotation is transmitted to both the planting shafts with the rotation of the rotating case. The seedling plant is configured such that the two seedling plants are swung and swung so that the tips of the split claws in the seedling plant draw a vertically long elliptical closed loop trajectory. The device is proposed.

As described above, a rotary seedling apparatus provided with two seedlings in one rotating case is, for example, a crank type seedling apparatus described in Japanese Patent Publication No. 48-27762. In comparison with the method, there is an advantage that the planting speed of the seedlings can be doubled and the size of the seedling plant can be reduced.

[0004]

However, in a conventional rotary seedling apparatus having two seedlings in one rotating case, as described in the above publications, both ends of one rotating case are disposed. When the split claw in one seedling of the two seedlings attached to the part takes out the seedling from the seedling mat on the seedling mounting table, and when the split claw in the other seedling transplants the seedling in the field scene In other words, at the same time when the seeds are taken out of the seedling mat on the seedling mounting table with the split claws in one seedling plant, the split nails in the other seedling plant enter the field scene almost at the same time. It is configured to plant seedlings.

[0005] By the way, the nail driving shaft for rotating and driving the rotary case having the two seedlings as described above has a split claw in the seedling when removing it from the seedling mat on the seedling table. Since the large torque acts locally as a load, the timing when the seedlings are taken out from the seedling mat on the seedling mounting table with the split claws in one seedling and the other seedlings When the timing at which the seedlings are planted in the field scene with the split claws in the body is configured to substantially coincide with the timing, when the seedlings are planted in the field scene with the split claws in the other seedling plant, The movement speed of the nail is increased or decreased due to the locally large torque generated when the seedling is removed from the seedling mat of the seedling mounting table by the split nail in the one seedling plant. It will be varied to or Tsu, as a result, planting attitude of seedlings to the field surface there has been a problem that the unstable not aligned substantially constant.

The present invention solves the above-mentioned problems that occur in a rotary seedling plant having two seedlings in one rotating case, and reduces the risk of damaging the seedlings by the rotating case when planting seedlings. It is a technical task to be able to do so.

[0007]

SUMMARY OF THE INVENTION In order to achieve this technical object, the present invention relates to a method in which a claw drive shaft, which is rotationally driven by power transmission from a power source, is provided on a body near a seedling mounting table in a substantially horizontal lateral direction. A pair of planting shafts are respectively supported in parallel with the claw drive shaft on the left and right sides of the rotation case mounted on the claw drive shaft. A seedling having split claws is mounted on both planting shafts in a posture toward the seedling mounting table, while the seedling is not inserted into the rotating case with the rotation of the rotating case. By providing a gear train for transmitting constant-speed rotation, the two seedlings are swung so that the tips of the split claws in the seedlings draw a locus of an elliptical closed loop that is long in the vertical direction. In the seedling plant configured as described above, during one rotation of the rotating case The timing when the split claw of one of the two seedlings removes the seedling from the seedling mat on the seedling mounting table, and the split claw of the other seedling of the two seedlings is set in the field scene While the timing when planting the seedlings is appropriately shifted, the timing at which the split claws in the two seedlings plant the seedlings in the field scene is set so that the two seedlings are attached with the rotation of the rotating case. Set the phase before the axis reaches the bottom dead center,
Further, each of the divided claws is a section from a position immediately before the divided claw enters the field scene to a time when a seedling is planted in the field scene in the movement trajectory of the elliptical closed loop curve long in the vertical direction, It is set so as to move in a posture that stands up with respect to the field scene while maintaining a substantially parallel posture. ".

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of the present invention applied to a walking type double-row rice transplanter. In the drawing, reference numeral 1 designates a float 6 which slides on a field scene B on the lower surface of a transmission case 5 having an engine 2 at the front and a seedling stand 3 and a handle 4 at the rear. A rice transplanter having wheels 7 mounted on the left and right sides of the machine body 5 via a swing case 8;
The aircraft 2 has an engine 2 at a position in front of the seedling mounting table 3.
A claw drive shaft 9 that is rotationally driven by the power from is rotatably supported in a substantially horizontal direction. At both ends of the claw drive shaft 9, a rotary seedling plant 10, which will be described in detail later, is mounted.

This rotary seedling plant 10 is shown in FIGS.
As shown in FIG. 1, an oval-shaped rotating case 11 is fitted and fixed to an end of a claw driving shaft 9 supported on the machine body 5, and the rotating case 11 is provided on the side surface of the rice transplanter 1 by the claw shaft 9. It rotates rightward as shown by an arrow A in view, and on the claw drive shaft 9 in the rotating case 11,
A sun gear 12 is rotatably engaged with the sun gear 12.
Is non-rotatably locked to the machine body 5 via an appropriate rotation phase adjusting means 13.

The rotary case 11 includes the pawl drive shaft 9
The support shafts 14 are respectively supported in parallel to the claw drive shaft 9 at positions on both the left and right sides with the same distance from the claw drive shaft 9, and the two support shafts 14 11 and a planetary gear 15 having the same number of teeth as the sun gear 12 on both support shafts 14.
Are rotatably fitted. The rotating case 1
1, an intermediate shaft 16 is supported at an intermediate position between the pawl drive shaft 9 and the two support shafts 14, and the sun gear 1
An intermediate gear 17 meshing with both the gear 2 and the planetary gear 15 is fitted to form a gear train mechanism.
15 and a cam 24 and a stopper arm 25, which will be described later, or a cam gear 24a and a missing tooth stopper gear 25a, and the planting shafts 18 fitted on the support shafts 14 as the rotating case 11 rotates. The gear train is configured to transmit unequal speed rotation to the gear train.

On the other hand, a sleeve-like planting shaft 18 is rotatably fitted on both support shafts 14 in the rotating case 11, and one end of the sleeve-like planting shaft 18 is moved outside the rotating case 11. At the protruding end, a seedling plant 20 having a splitting nail 19 of a seedling at the tip is provided.
However, they are fixed to the seedling table 3 in a posture position facing the seedling mounting table 3, respectively.

The planetary gears 15 on the two support 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, and a fan-shaped cam 24 is fixed to each of the two intermediate shafts 16 in the rotating case 11, while being fixed to both the planting shafts 18 in the rotating case 11. The stopper arm 25 is integrally provided, and the seedling plant 20 is provided at 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. In a section in which the lowering from the corresponding height position (that is, the position where the rotating case 11 is substantially horizontal) to a position slightly before the lowering lower limit (that is, the position where the split claw 19 has entered the field scene B to a predetermined depth), only,
The stopper arm 25 of the planting shaft 18 comes into contact with the arc-shaped outer peripheral surface 26 of the cam 24 on the intermediate shaft 16, so that the left rotation of the planting shaft 18 is delayed only in the above section. is there.

During one rotation of the rotating case 11, the rotating case 11 is moved as shown in FIG.
When rotated from the top dead center TDC in the direction of arrow A in the direction of arrow A by about 45 degrees, the split claws 19 in both seedling plants 20
Of the rotating case 11
Is rotated from the top dead center TDC in the direction of arrow A in the direction of arrow A by about 150 degrees, so that the split claws 19 of the two seedlings 20 enter the field scene B, so that the rotating case 11 During one rotation, the timing when the split claws 19 in one of the two seedling plants 20 take out the seedlings from the seedling mat on the seedling mounting table 3,
Split nail 1 in the other seedling plant 20 of both seedling plants 20
9 is the timing when planting seedlings in the field scene B,
It is configured so as to be appropriately shifted from each other without overlapping.

Further, the split claw 1 of the two seedling plants 20
The timing at which the seedlings 9 are planted in the field scene B is at an appropriate angle θ3 (θ3 = 180 degrees-θ2 = 180 degrees-150 degrees = 3
0 °).

In this configuration, when the rotating case 11 of the seedling planting apparatus 10 revolves in the direction of the arrow A by the claw drive shaft 9, both ends are attached to the planting shafts 18 fitted to the two supporting shafts 14 at both ends. The seedling 20 revolves around the claw drive shaft 9, but the planting shaft 18 to which the seedling 20 is attached is elastically connected to the planetary gear 15 via a spring 23. The sun gear 12 meshes with the sun gear 12 via the intermediate gear 17 to form a gear train mechanism with the sun gear 12, and the sun gear 12 and the planetary gear 15 have the same number of teeth. 15 and the planting shaft 18 connected thereto, the revolving rotation of the rotating case 11 in the direction of the arrow A causes the support shaft 14 to rotate in the direction opposite to the direction of the arrow A by the same rotation angle as the rotation angle of the revolution. Because it rotates around the center, Planting shaft 18 mounted rather than to RyonaeUetai 20
Is in the state of facing the seedling mounting table 3 and the seedling mounting table 3
In a direction of arrow A while maintaining a constant posture with respect to the seedling mounting table 3 during this turning movement. After splitting one seedling from the seedling mat on the seedling mounting table 3 by the splitting claws 19, the seedlings are planted in the field scene B near the lower lower limit, and then rise 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 plant 20 on the side facing the seedling mounting table 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 the rotation of the seedling plant 20 in the direction opposite to the arrow A from this point, the seedling plant 20 is rotated in the opposite direction to the arrow A of the seedling plant 20. The rotation in the direction 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 direction of the arrow A, and the claws 21 and 22 are opposed to the spring body 23. And the spring body 23 stores the elastic force), and the seedlings 20 of the rotation case 11 revolve in the direction of the arrow A so that the divided claws 19 thereof are substantially perpendicular to the field scene B. The posture is changed so as to enter the field scene B.

When the stopper arm 25 comes off the arcuate outer peripheral surface 26 of the cam 24 as the rotary case 11 revolves in the direction of arrow A, the seedling plant 20 is
Is returned around the support shaft 14 in the direction opposite to the arrow A by the elastic force of the above, and 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 scene B by this return rotation. The moving locus of the tip of the split claw 19 at this time is shown by two points in FIG. 7 because the seedling plant 20 returns to the original posture while moving away from the seedling after planting and climbing up from the field scene B. As shown by the dashed line, the closed loop curve D has an elliptical shape elongated in the vertical direction.
An elliptical closed loop curve having the same shape as that of the crank type seedling plant described in Japanese Patent Application Laid-Open No. 9-27762 or the like is obtained.

That is, when the split claw 19 is lowered toward the field scene B while holding the seedlings, the two seedling plants 20 here change their posture vertically and invade the field scene B. When climbing out of the surface B, the seedlings rise while escaping away from the seedlings after planting, so that the seedlings can be reliably planted in the field scene B under the correct posture. In this case, by adjusting the timing when the rotation of each seedling plant 20 is delayed or advanced with respect to the revolution of the rotating case 11, or the like, the motion trajectory of the closed loop curve D having an elliptical shape elongated in the vertical direction is determined. Of these, the section from immediately before the split claw 19 enters the field scene B to the lowermost end of the motion trajectory, that is, the section from when the split claw 19 plants a seedling to the field scene B, the split claw 19 is It is configured in such a shape as to move in a posture standing up to the field scene B and maintaining a substantially parallel posture.

With such a configuration, the split claws 19 in each seedling plant 20 are not substantially changed in posture when approaching the field scene B, and the seedlings are planted in a state in which they are substantially parallel. You will enter until completion. In the above embodiment, the cam 24 of the intermediate shaft 16 and the stopper arm 25 of the planting shaft 18 delay the rotation of the seedlings 20 by the planetary gears 15 with respect to the revolution of the rotating case 11, so that both In this case, non-uniform rotation was transmitted to the planting shaft 18. However, instead of this method, as shown in FIGS. And a cam gear 24a having a toothless portion 26b, and a toothless stopper gear 25a in which some of the teeth of the circumference are cut off are provided on both planting shafts 18, thereby providing the same as above. To do the work,
In other words, it is possible to transmit the unequal-speed rotation to the planting shaft 18 with the rotation of the rotating case 11. According to this embodiment, the seedlings are delayed with respect to the revolution of the rotating case 11. Restoring the body 20 can be accomplished by the cam gear 24
a and the stopper gear 25a can be formed by meshing rotation, so that there is an advantage that the spring body 23 for elastically connecting the planetary gear 15 and the seedling plant 20 can be reduced in size.

[0020]

As described above, the present invention relates to a rotating seedling apparatus provided with two seedlings in one rotating case, wherein the two seedlings are rotated during rotation of the rotating case. The timing when the split claw in one seedling plant takes out the seedling from the seedling mat on the seedling mounting table, and the timing when the split claw in the other seedling plant of both seedling plants plant the seedling in the field scene And the claw drive shaft for rotating and driving the rotating case, a local area generated when the seedlings are taken out of the seedling mat by the split claws in one seedling plant. Large torque can be prevented from acting as a load at the same time when the seedlings are planted in the field scene with the split claws in the other seedling, so that the split claws in the other seedling can The movement speed of the split claw when planting seedlings in the scene, due to the locally large torque generated when removing the seedling from the seedling mat of the seedling mounting table with the split claw in the one seedling plant, It is possible to reliably prevent the fluctuation from being faster or slower.

In addition, each of the divided claws extends from a portion of the movement trajectory of the elliptical closed loop curve that is long in the up-down direction immediately before the divided claws enter the field scene to when the seedlings are planted in the field scene. Is set so as to move in an upright posture with respect to the field scene and while maintaining a substantially parallel posture. As it will enter until planting of seedlings is completed while maintaining the above, as described above,
The movement speed of one split claw when planting seedlings in a field scene is increased due to locally large torque generated when removing seedlings from the seedling mat of the seedling mounting table with the other split claw, or When planting seedlings with two seedlings provided for one rotating case, in combination with being able to reliably prevent slowing and fluctuation, the planting posture of the seedlings with respect to the field scene Therefore, the stability of the planting posture of the seedlings can be greatly improved so as to be substantially uniform.

In addition, the timing when the split claws of the two seedlings plant the seedlings in the field scene is determined by the rotation of the rotating case, so that the planting shaft to which the two seedlings are attached reaches the bottom dead center. By setting the phase earlier than the rotation case in the planting posture state, the distance along the traveling direction of the rice transplanter between the planting position of the seedling with respect to the field scene, for example, after passing through the bottom dead center Than when setting the timing of planting the seedlings in the phase of
In other words, since the rotating case in the planting posture state can be moved away from the planting position of the seedling with respect to the field scene along the traveling direction of the rice transplanter, the leaves of the seedling to be planted with respect to the field scene are reduced. In addition, it is possible to reliably reduce the possibility that the rotating case rotating toward the planting posture state may be damaged by contacting the rotating case.

[Brief description of the drawings]

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

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

FIG. 3 is a sectional view of a seedling plant.

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 plant.

FIG. 8 is a diagram showing another example of a seedling plant.

FIG. 9 is a view showing an operation state of FIG. 8;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rice transplanter 9 Claw drive shaft 10 Seedling plant 11 Rotating case 12 Sun gear 14 Support shaft 15 Planetary gear 16 Intermediate shaft 17 Intermediate gear 18 Planting shaft 19 Split claw 20 Seedling

Claims (1)

(57) [Claims] 1. A claw drive shaft, which is rotationally driven by a power transmission from a power source, is supported substantially horizontally on a body near a seedling mounting table, and a rotating case mounted on the claw drive shaft includes: A pair of planting shafts are respectively supported in parallel on the left and right sides of the claw drive shaft in parallel with the claw drive shaft, and the seedling plant having split claws on both the planting shafts is a seedling. The two seedlings are mounted in the rotating case while a gear train that transmits unequal speed rotation to the two planting shafts with the rotation of the rotating case is provided in the rotating case. The plant
In the seedling plant, the tip of the split claw in the seedling is swung and swung so that the tip of the split claw draws a long elliptical closed loop trajectory. The timing at which the split claws in one seedling plant of the seedlings take out the seedlings from the seedling mat on the seedling mounting table, and the split claws in the other seedling plant of the two seedling plants set the seedlings in the field scene. While the timing of planting is appropriately shifted, the timing at which the split claws in the two seedlings plant the seedlings in the field scene, the planting shaft on which the two seedlings are attached with the rotation of the rotating case is lowered. site immediately preceding set phase before reaching the dead point, further, each of the split nail, to which the splitting claw of the movement locus of the oval-shaped closed loop curve to the vertical direction enters against the field plane From The interval until the planting seedlings serial field plane, in an upright position with respect to the field plane, and, NaeUe device in planting machine is characterized in that set substantially so as to move while holding a parallel orientation .