JPH0757131B2 - Seedling planting device in rice transplanter - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a rotary type seedling planting device in a rice transplanter, in which one rotary case is provided with two seedling plants.

[Conventional technology]

Japanese Patent Publication No. 49-17806 and Japanese Patent Publication No. 49-1 as prior art.
Japanese Patent Publication No. 7807 and Japanese Patent Publication No. 49-17808 disclose, as a rotary type seedling planting apparatus of this type, a claw drive shaft that is rotationally driven by power transmission from a power source to a machine near a seedling mounting table in a substantially horizontal direction. In the rotating case that is laterally supported and mounted on the pawl drive shaft, the planting shafts are respectively supported in parallel with the pawl drive shaft at both left and right sides of the pawl drive shaft. While mounting the seedling plant having the split claws on the planting shaft in a posture toward the seedling table side, the planting shaft is unequal with respect to both planting shafts in the rotating case as the rotating case rotates. By providing a gear train that transmits high speed rotation, both seedling plant,
A seedling planting device is proposed in which the tips of the split claws in the seedling plant are pivotally rotated so as to draw a locus of an elliptical closed loop that is long in the vertical direction.

And, as described above, a rotary type seedling plant having two seedlings in one rotary case is disclosed in, for example, Japanese Patent Publication No. Sho 48-27762.
Compared with the crank type seedling planting device described in Japanese Patent Publication No. 2003-242242, the seedling planting speed can be doubled and the seedling planting device can be downsized.

[Problems to be Solved by the Invention]

However, in the conventional rotary type seedling plant equipped with two seedlings in one rotating case, as described in each of the above-mentioned public relations, both seedlings attached to both ends of one rotating case are Make sure that the timing when the split claws in one of the seedling plants take out the seedlings from the seedling mat on the seedling mounting table and the timing when the split claws in the other seedling plant plant the seedlings in the field scene are substantially the same. In other words, it is configured such that the seedlings are taken out from the seedling mat on the seedling mounting table with the split claws in one seedling plant substantially at the same time as the seedlings are planted in the field scene with the split claws in the other seedling plant. .

By the way, as described above, the claw drive shaft for rotationally driving the rotating case having the two seedling plants has a large torque when it is taken out from the seedling mat in the seedling mounting table by the split claws in the seedling plant. Since it acts locally as a load, the timing when the seedlings are taken out from the seedling mat on the seedling mounting table by the dividing claws on one seedling plant and the division on the other seedling plant as in the conventional case. When the nails are configured so that the timing for planting seedlings in the field scene is substantially the same, the movement of the split nails when planting seedlings in the field scene with the split nails in the other seedling plant The speed may be faster or slower due to the locally large torque generated when removing seedlings from the seedling mat of the seedling mounting table with the split claws in the one seedling plant. Will be varied urchin, so that planting orientation seedlings for field plane there is a problem that unstable without aligned substantially constant.

The present invention solves the above-mentioned problems occurring in a rotary type seedling planting apparatus having two seedling plants in one rotary case, and at the time of planting seedlings, it is possible to reduce the risk of damaging the seedlings by the rotary case. The purpose is to do.

[Means for Solving the Problems] In order to achieve this object, the present invention provides a machine near a seedling stand with a pawl drive shaft rotatably driven by power transmission from a power source in a substantially horizontal lateral direction. Then, in the rotating case mounted on the pawl drive shaft, a pair of planting shafts are axially supported in parallel with the pawl drive shaft at both left and right sides of the pawl drive shaft. In addition, while mounting the seedling plant having the split claws in a posture toward the seedling mounting table side, in the rotation case, the rotation speed of the rotation case is unequally rotated with respect to both the planting shafts. By providing a gear train adapted to transmit the above, the both seedling plants are configured to swing and swing so that the tips of the split claws in the seedling plant draw a locus of an elliptical closed loop that is long in the vertical direction. In the seedling planting device consisting of
The timing when the split claws in one of the two seedling plants take out the seedling from the seedling mat in the seedling mounting table during one rotation of the rotating case, and the other seedling in the two seedling plants While the split claws in the plant shift the timing when planting the seedlings in the field scene as appropriate, the timing when the split claws in both seedling plants plant the seedlings in the field scene with the rotation of the rotating case. Both seedlings are attached and the planting axis is set to the phase before reaching bottom dead center.

〔Example〕

Hereinafter, the embodiment of the present invention will be described with reference to the drawings of the embodiment when applied to a walk-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.
1 shows a rice transplanter that is mounted via a claw drive shaft 9 that is rotatably driven by the power from the engine 2 at a position in front of the seedling table 3 on the body 5 of the rice transplanter 1. A rotary type seedling planting device 10, which will be described in detail later, is attached to both ends of the claw drive shaft 9 which is axially supported.

As shown in FIGS. 3 to 5, this rotary type seedling planting device 10 is provided with an oval type rotating case 11 fitted and fixed to an end portion of a claw drive shaft 9 which is axially supported with respect to the machine body 5. , The rotating case 11
Is rotated in the right direction by the pawl shaft 9 as shown by an arrow A in a side view of the rice transplanter 1. The sun gear 12 is rotatably mounted on the pawl drive shaft 9 in the rotating case 11. The sun gear 12 is fitted and fixed to the machine body 5 non-rotatably via an appropriate rotation phase adjusting means 13.

In the rotating case 11, support shafts 14 are arranged in parallel with the pawl drive shaft 9 at positions on both left and right sides of the pawl drive shaft 9 at the same distance from the pawl drive shaft 9. The support shafts 14 are non-rotatably fixed to the rotating case 11, and a planetary gear 15 having the same number of teeth as the sun gear 12 is rotatably mounted on the support shafts 14. It is fitted. An intermediate shaft 16 is axially supported in the rotary case 11 at an intermediate position between the pawl drive shaft 9 and both support shafts 14.
An intermediate gear 17 that meshes with both the sun gear 12 and the planetary gear 15 is fitted on 16 to form a gear train mechanism.

On the other hand, on both support shafts 14 in the rotating case 11,
A sleeve-shaped planting shaft 18 is rotatably fitted, one end of the sleeve-shaped planting shaft 18 is projected to the outside of the rotating case 11, and the projecting end is provided with a seedling dividing claw 19 at the tip. The split claws 19 of the seedling plant 20 are fixed so that the split nails 19 are oriented toward the seedling platform 3.

Then, the planetary gears 15 on both the support shafts 14 are integrally provided with claws 21 projecting toward the planting shaft 18, and the planting shafts 18 are integrally provided with claws 22 projecting toward the planetary gear 15. The claws 21 and 22 are configured to contact each other when the planetary gear 15 rotates to the right and separate from each other when the planetary gear 15 rotates to the left. By providing a ring-shaped spring body 23 for urging the members 22, 22 in the direction of abutting each other,
The ring-shaped spring body 23 is configured to elastically transmit the left rotation of the planetary gear 15 to the planting shaft 18, and both the intermediate shafts 16 in the rotating case 11 have a fan-shaped cam 24. While fixing each one, both planting shafts in the rotating case 11
A stopper arm 25 is integrally provided on each of the 18 and the seedling plant 20 is provided on the side facing the seedling mounting table 3 as the rotating case 11 rotates in the direction of arrow A. It descends from a height position corresponding to the lower end (that is, the position where the rotating case 11 is substantially horizontal) to a position slightly before the lower limit of descending (that is, the position where the split claw 19 penetrates into the field scene B to a predetermined depth). Only in the section, the stopper arm 25 of the planting shaft 18 contacts the arcuate 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 section. It consists of

Then, in one rotation of the rotating case 11, as shown in FIG. 7, when the rotating case 11 rotates θ1 = about 45 degrees from the top dead center TDC in the direction of the arrow A, both seedling plant 20
When the rotating case 11 rotates in the direction of arrow A from the top dead center TDC in the direction of θ2 = about 150 degrees while the split claw 19 in FIG. By configuring 19 to enter the field B, during one rotation of the rotating case 11,
The timing when the dividing claw 19 of one of the two seedling plants 20 takes out the seedling from the seedling mat on the seedling mounting table 3 and the division of the other seedling plant 20 of the two seedling plants 20 The timing when the claws 19 plant the seedlings in the field scene B does not overlap with each other and is appropriately shifted from each other.

Furthermore, the timing at which the split claws 19 of the both seedling plantings 20 plant seedlings in the field scene B is such that the two seedling plantings 20 are attached with the rotation of the rotating case 11 and the planting shaft 18 is at the bottom dead center.
Rather than reaching BDC, angle θ3 (θ3 = 180 degrees-θ
2 = 180 degrees-150 degrees = 30 degrees) so that the phase is set to the previous phase.

In this configuration, the rotating case 11 in the seedling planting device 10
When the claw drive shaft 9 revolves in the direction of arrow A, the planting shaft 18 fitted on both support shafts 14 at both ends thereof.
The two seedling plants 20 attached to the orbit revolve around the claw drive shaft 9, but the planting shaft 18 to which the seedling plant 20 is attached is elastically connected to the planetary gear 15 via a spring body 23. The planetary gear 15 meshes with the sun gear 12 via the intermediate gear 17, and a gear train mechanism is formed between the planetary gear 15 and the sun gear 12, and the sun gear 12 and the planetary gear
15 has the same number of teeth, and the planetary gear 15 and the planting shaft 18 connected thereto have only the same rotation angle as the revolution angle of the revolution case 11 in the direction of the arrow A. Since it rotates about the support shaft 14 in the direction opposite to the direction of the arrow A, both seedling plants 20 attached to the both planting shafts 18 are rotated.
Is facing the seedling mounting table 3 and, moreover, the seedling mounting table 3
With respect to the seedling stand 3, the robot turns in the direction of arrow A while maintaining a constant posture with respect to After splitting only one seedling from the seedling mat on the seedling mounting table 3 with the split claws 19, in the vicinity of the lower limit of the descending field B
It is planted in and then rises above the scene B in the field.

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 has an intermediate shaft as shown in FIG. By contacting the arc-shaped outer peripheral surface 26 of the cam 24 on 16 and stopping 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 direction opposite to the arrow A. Rotation of the rotating case 11 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).
Away from the spring body 23, and elastic force is stored in the spring body 23), and the split claw 19 of the seedling plant 20 is rotated in the direction of the arrow A of the rotating case 11 so that the split claw 19 thereof is in the field scene. The posture is changed so as to be substantially vertical to B, and the farm scene B is invaded.

When the stopper arm 25 disengages from the arcuate outer peripheral surface 26 of the cam 24 as the rotating case 11 revolves in the direction of arrow A, the seedling plant 20 is supported by the elastic force of the spring body 23 in the direction opposite to arrow A. After being planted in the field scene B, the split claws 19 are rotated in the direction opposite to the traveling direction of the rice transplanter 1, that is, while moving away from the seedlings after planting. It breaks up from B and rises, and eventually the seedling plant 20 returns to its original posture, so the split claw at this time
The locus of motion of the tip of 19 is, as shown by the chain double-dashed line in Fig. 7,
An elliptical closed loop curve D elongated in the up-down direction is obtained. For example, an elliptical closed loop curve having the same shape as that of the crank type seedling plant described in Japanese Patent Publication No. 49-27762 is long. Will be obtained.

In other words, both seedling plants 20 here vertically invert the posture when the divided claws 19 descend with the seedlings toward the farm scene B and invade the farm scene B, and from the farm scene B after planting. Since it rises while escaping away from the seedlings after planting, it is possible to reliably plant the seedlings in the field B under the correct posture.

In the above embodiment, the cam 24 of the intermediate shaft 16 and the planting shaft 18
With the stopper arm 25 of, the rotation of the seedling plant 20 by the planetary gear 15 is delayed with respect to the revolution of the rotating case 11 to transmit the non-uniform rotation to both planting shafts 18. In place of the above, as shown in FIGS. 8 and 9, on the intermediate shaft 16, a cam gear 24a having an arcuate outer peripheral surface 26a and a toothless portion 26b in a part of its circumference is fixed, On both of the planting shafts 18, a toothless stopper gear 25a is provided by cutting out a part of the teeth of the circumference, by which the same operation as described above is performed, that is, with the rotation of the rotating case 11. The planting shaft 18 may be configured to transmit non-uniform speed rotation, and according to this embodiment, the rotating case 11
The seedling plant 20 can be returned to its original position after being delayed with respect to the revolution of the cam gear 24a and the stopper gear 25a, so that the planet gear 15 and the seedling plant 20 can be elastically coupled to each other. There is an advantage that the body 23 can be downsized.

[Operation and effect of invention]

As described above, the present invention is, in a rotary type seedling plant provided with two seedling plants in one rotary case, in one seedling plant of the both seedling plants during rotation of the rotary case. The timing when the nail removes the seedling from the seedling mat on the seedling mounting table and the timing when the split nail in the other seedling plant of the two seedling plants shifts the seedling in the field scene appropriately. By configuring
With respect to the nail drive shaft for rotationally driving the rotating case, a locally large torque generated when the seedlings are taken out from the seedling mat by the split claws in one seedling plant, in the other seedling plant, It is possible to avoid acting as a load at the same time when the seedlings are planted in the field scene with the split nails, and as a result, the movement speed of the split nails when seedlings are planted in the field scene with the split nails in the other seedling plant. However, due to the locally large torque generated when the seedlings are taken out from the seedling mat of the seedling mounting table with the split claws in the one seedling plant, it may be changed to be faster or slower. Therefore, when planting seedlings with two seedling plants provided for one rotating case, make the seedling planting posture in the field scene approximately uniform. Sea urchin, it can greatly improve the stability of the seedling planting position.

Moreover, the timing when the split claws in the both seedling plants are planting seedlings in a field scene is set to the phase before the planting axis to which the both seedling plants are attached with the rotation of the rotating case reaches the bottom dead center. By setting, the distance between the rotating case in the planting posture state and the planting position of the seedling in the field scene, the timing when the split claws in the seedling planting the seedling in the field scene, the rotation of the rotating case Along with that, the planting axis to which both seedlings are attached can be set to the phase of the bottom dead center, or it can be made larger than when it is set to the phase after passing through the bottom dead center, in other words, the planting posture. Since the rotating case in the state can be moved away from the planting position of the seedlings in the field scene, the leaves of the seedlings planted in the field scene rotate toward the planting posture. It can be reliably reduced that it may spoil in contact with.

[Brief description of drawings]

The drawings show an embodiment of the present invention. 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 planting device, and Fig. 4 is IV of Fig. 3. -IV sectional view, FIG. 5 is a sectional view taken along line V-V of FIG. 3, FIG. 6 is a diagram showing a working 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 embodiment of the seedling planting device, and FIG. 9 is a diagram showing the operating state of FIG. 1 ... rice transplanter, 9 ... nail drive shaft, 10 ... seedling planting device, 11 ...
… Rotating case, 12 …… Sun gear, 14 …… Support shaft, 15 ……
Planetary gears, 16 …… intermediate shaft, 17 …… intermediate gears, 18 …… planting shaft, 19 …… splitting claws, 20 …… planting seedlings, 21,22 …… claws, 23
...... Spring body, 24 …… Cam, 25 …… Stopper arm, 24
a …… Cam gear, 25a …… Stopper gear.

Claims (1)

[Claims] 1. A pawl drive shaft, which is rotationally driven by power transmission from a power source, is supported on a machine body near a seedling mounting table in a substantially horizontal direction, and a rotary case mounted on the pawl drive shaft comprises: A pair of planting shafts are respectively supported on both the left and right sides of the nail drive shaft in parallel with each other, and the pair of planting shafts are provided with split claws on both planting shafts. While being mounted in a posture toward the platform side, a gear train is provided in the rotating case so as to transmit unequal speed rotation to the both planting shafts with the rotation of the rotating case. The plant
A seedling planting device configured such that the tips of the split claws in the seedling plant are pivotally rotated so as to draw a locus of an elliptical closed loop that is long in the up-down direction. The timing when the split claws in one seedling plant of the plant 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 put the seedlings in the field scene. While properly shifting the timing when planting, the timing when the split nails in both seedling plants plant seedlings in the field scene, the planting axis to which the two seedling plants are attached with the rotation of the rotating case is A seedling planting device in a rice transplanter, which is set to a phase before reaching a dead point.