JPH01257406A - Seedling planting device of rice transplanter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a seedling planting device for dividing seedlings one by one from a seedling mat on a seedling platform in a rice transplanter and then planting the seedlings in a field. It is related to.

[Conventional technology]

Conventionally, this type of seedling planting device was developed by, for example, the Japanese Patent Publication No. 49-2776.
As described in Publication No. 2, the planting with a split claw at the tip connects the base end of the rod to the fuselage side via the fan link, while the planting connects the middle part of the rod to the engine. The planting rod was pivoted to the tip of a crank fixed to a nail shaft that was rotationally driven, and the rotation of the crank caused the planting rod to swing up and down so that the tips of the split nails traced a closed loop trajectory.

However, this conventional vertically swinging type seedling planting device differs from the previous rotary type described in, for example, Japanese Utility Model Publication No. 33-18922, in that the split claw attached to the rod is used as a seedling platform for planting. Since it moves up and down while facing in the direction of the rotary type, it has the advantage of being able to take out the seedlings from the seedling stand with the split claw and plant them almost vertically in the field. Vibration is generated due to the violent up-and-down movement of the rod, and this vibration increases in proportion to the speed of the up-and-down movement. Since seedlings can only be planted once per rotation, the speed of planting cannot be increased.

Therefore, the present inventor filed an earlier patent application (Japanese Patent Application No. 59-125).
No. 881) is based on a rotary system, in which multiple plants are attached to a rotary case so that the tip of the split claw on the rod pivots vertically while facing the direction of the seedling stand. By configuring this, we proposed a seedling planting device that has the features of both a rotary type seedling planting device and a vertically swinging type seedling planting device.

[Problem that the invention seeks to solve]

Even in this type of seedling planting device, when the rotor case is rotating, the splitting claws on the rod may hit stones in the field, causing excessive force to be applied to the planting rod or splitting claws, causing the planting to rotate. Planting that rotates in the opposite direction to the revolving direction of the body case will cause excessive force on each member such as the rod unless the rotation angle of the stem is larger than normal. There was a risk that these would be damaged due to

Means for Solving Problem C] For this reason, the present invention provides for a transmission case in the body of a rice transplanter to support a rotating shaft that is rotationally driven by power transmission from a power source, and to attach a rotating body to the rotating shaft. A case is attached, and the rotating body case has one or more shafts parallel to the rotating shaft. On the other hand, a sun gear is disposed at a central position within the rotating body case so that the rotation phase can be freely adjusted by an appropriate angle with respect to the rotating body case, and the sun gear and the planting rotate about the shaft. The sun gear is interlocked and connected via a group of planetary gears so that the body case rotates once in the opposite direction to the rotation direction of the sun gear, and when the torque acting on the sun gear exceeds a certain level, the rotation phase of the sun gear changes. The configuration includes a safety device that can temporarily change the

[For production]

- In this way, when the rotating body case in the seedling planting device rotates, the planting shaft, which is interlocked via the planetary gear that meshes with the sun gear provided at the center, rotates in the opposite direction to the rotating direction of the rotating body case. However, in this case of planting with split claws that are attached to a shaft, the rod rotates around the rotation axis of the rotating body case with the rod facing the direction of the seedling stand.

During the downward movement of this turning movement, for example, when the dividing claw is inserted into the field, a pebble hits it, and when a force is applied that pushes the stem upward in the opposite direction to the downward direction, the planetary A certain amount of rotational torque is applied to the sun gear via the gear, so by rotating the sun gear to a certain extent via the safety device using this certain amount of torque, the above-mentioned planting can reduce the upward force applied to the stem. Excessive torque caused by this can be released. After releasing such excessive torque, it is only necessary to manually or automatically restore the phase relationship of the sun gear to the transmission case to a predetermined position. When planting multiple plants, each stem rotates so that it moves up and down with its divided claw facing the direction of the seedling stand, so for each planting, the bottom side of the stem always moves up and down while facing the direction of the field. .

〔Example〕

The present invention will be described below with reference to drawings of embodiments. In FIG. 1, reference numeral 1 indicates a transmission case in the body of a rice transplanter, 10 indicates a seedling stand, and the machine moves forward in the direction of the arrow in FIG.

On the side surface of the transmission case 1, a boss body 2 is arranged horizontally and laterally at a position rearward from the seedling platform 10, and is oriented substantially parallel to the seedling platform 10, in other words, in a horizontal direction substantially perpendicular to the direction of movement of the machine. A rotary shaft 3 is inserted into the boss body 2 and is rotatably driven by power transmission from an engine (not shown) mounted on the body of the rice transplanter. An oval-shaped and hollow rotary body case 4 is fitted onto the protruding end of the rotary body, and the rotary body case 4 is configured to be rotated in the right direction of arrow A when viewed from the side.

A sun gear 5 rotatably fitted into the boss body 2 and rotatable relative to the rotor case 4 is disposed at the center of the rotor case 4.
is locked to the transmission case l by a rotational phase adjustment mechanism 20, which will be described later, so that the phase can be adjusted freely.

At both left and right ends of the rotating body case 4, a cam shaft 6 is provided at the same distance (L) from the rotating shaft 3 as shown in FIG.
is parallel to the rotating shaft 3 and non-rotatably supported on the rotating body case 4, and a hollow planting shaft 7 is rotatably fitted onto the camshaft 6, and the planting shaft is One end of the shaft 7 protrudes to the outside of the rotating body case 4, and each of the planting shafts 7 is provided with a split claw 9 extending toward the seedling stand 10 at the protruding end of the shaft 7. The rod 8 is attached at its base, while an intermediate shaft 11 is rotatably supported in the rotating body case 4 at a position intermediate between the rotating shaft 3 and each planting shaft 7 in parallel with both shafts. , An intermediate gear 12 that meshes with the sun gear 5 and has the same number of teeth as the sun gear 5 is fitted onto each of the intermediate shafts 11 .

An interlocking gear 13 having the same number of teeth as the intermediate gear 12 is fitted onto the intermediate shaft 11, while an interlocking gear 13 having the same number of teeth as the interlocking gear 13 on the intermediate shaft 11 is fitted onto the planting shaft 7. And by fitting the interlocking gear 14 which always meshes with this, the intermediate shaft 11 and the planting shaft 7 are interlocked and connected by the interlocking gears 13 and 14, so that one rotation of the rotating body case 4 Planting is performed so that the shaft 7 rotates once in the direction opposite to the direction of rotation of the rotating body case 40.

On the other hand, each of the planting rods 8 is provided with a guide shaft 16 that extends substantially parallel to the dividing claws 9 and is slidable up and down, and a pushing tool 17 is fixed to the lower end of the guide shaft 16, The cam shaft 6 and the slider at the upper end of the guide shaft 16 are related to each other through an interlocking mechanism (not shown) such as a pushing lever disposed in the rod 8, and the above-mentioned For each planting, only when the rod 8 comes close to its lower limit, the extrusion lever rotates downward by the spring force, so that the seedlings held between the front dividing claws 9 are forcibly planted on the field. Configure it so that you can.

The rotational phase adjustment mechanism 20 of the sun gear 5 is provided at an appropriate location on the transmission case 1, and can adjust the phase position of the sun gear 5 relative to the transmission case 1 forward or backward by rotating a handle 21 from the outside. It is configured as follows. That is, as shown in FIGS. 6 and 7, a rotary shaft 23 is rotatably supported on a stand 22 erected at an appropriate location outside the transmission case 1, and a rotary shaft 23 is rotatably supported on the rotary shaft 23. A hook 25 is provided along the handle 21 that protrudes from one end of the clutch body 24 that is fitted, and the hook 25 can be engaged or disengaged at any location of a locking portion 26 carved at appropriate intervals on the stand 22. On the other hand, the safety press body 28 slidably fitted on the spline portion 27 of the rotating shaft 23 is elastically biased against the side surface of the clutch body 24 by the force of a spring 29, and the safety press body 28
A claw portion 30 formed on one side surface and a claw portion 31 formed on the side surface of the clutch body 24 are made to mesh with each other, and a crank 32 that rotates integrally with the rotation shaft 23 and the sun gear 5 are connected to each other. The crank arm 33 of the stand 22 is interlocked with the crank arm 33 via a link 34, and the handle 21 is rotated to attach the hook 25 to an arbitrary locking part 26 on the stand 22.
By locking the sun gear 5, the phase position of the sun gear 5 can be set and adjusted. Furthermore, the safety pressing body 28, the clutch body 24, and the spring 29 temporarily change the rotation phase of the sun gear 5 by an appropriate angle when a rotation torque of a certain level or more is applied to the sun gear 5. This is a safety device that releases the excess torque, and when the sun gear 5 rotates with a rotation torque exceeding a certain level, the crank arm 33. Link 34. The safety pressing body 28, which moves integrally through the crank 32° rotation shaft 23, resists the force of the spring 29 to force the clutch body 2
It is configured to be shifted by a certain angle from the claw portion 31 at 4. Note that FIG. 8 shows the claw portion 30 formed on one side of the safety pressing body 28 and the claw portion 3 formed on the side of the clutch body 24.
1 is a developed view showing an example of an engagement pattern with No. 1. FIG.

In this configuration, when the rotating body case 4 revolves in the right direction of the arrow A by its rotating shaft 3, the intermediate gear 12 meshing with the sun gear 5, which cannot rotate with respect to the transmission case 1, rotates as the rotating body case 4 revolves. Accordingly, the intermediate gear 12 rotates in the right direction of the arrow B by the same rotation angle as the rotation angle of the revolution, and the interlocking gear 13. Planting linked via i4 is axis 7
rotates in the left direction of the arrow C, that is, in the opposite direction to the revolution direction of the rotating body 4 due to the rotation of the intermediate gear 12. As shown in FIG. 2, the seedling table 1o remains facing the direction and rotates around the rotating shaft 3, and the dividing claws 9 on the rod 8 are used for planting as shown in FIGS. 2 and 9. A closed-loop motion locus 36 is drawn as shown by the two-dot chain line in the figure.

During this turning movement, when descending from top to bottom on the side facing the seedling platform 10, the tip of the dividing claw 9 touches the seedling platform 1.
After dividing only one seedling from the seedling mat above 0, the seedling is planted in the field scene 35 near the lower limit of descent, after which it rises above the field scene 35.

Then, while the rotating body case 4 revolves in the right direction of the arrow A, the rod 8 of each planting rotates in the left direction of the arrow C with respect to the camshaft 6, that is, in the opposite direction to the revolution direction of the rotating body case 4. By doing so, each planting is performed by the forced planting mechanism in the rod 8, and the guide shaft 16 is planted at the lower limit of the rod 8 by its divided claw 9.
When the tip of the guide shaft 16 enters the field area 25, it moves downward, so the pushing tool 17 at the lower end of the guide shaft 16 moves downward toward the tip of the dividing claw 9 to push the seedling into the field area 25. Then, plant the seeds. When this forced planting is completed, the split claw 9 rises from the field scene 35 and at the same time, the pushing tool 17 returns to its original position from the tip of the split claw 9.

When planting seedlings in this way while descending during work, if the tip of the split claw 9 of the rod 8 collides with a pebble mixed in the field area 35, the seedling will be planted on the rod 8 due to the split claw. An upward force is applied from the lower end of 9, and as shown in FIG. 9, it rotates upward by an appropriate angle (θ1) compared to the normal case.

In other words, since the planting in the opposite direction to the revolution of the rotating body case 4 rotates by an angle (θl) in the opposite direction to the normal rotation of the rod 8, the sun gear is 5 is subjected to an excessive torque than in the normal case, so the crank arm 33 attached to it is rotated to the left as shown by the dashed line in FIG.
3 In addition, the angle between the safety pressing body 28 and the claw portion 31 of the clutch body 24 is shifted against the force of the spring 29, and the excessive torque applied to the sun gear 5 can be temporarily released.

In addition, in order to increase or decrease the amount of seedlings taken out from the seedling mat on the seedling platform 1° by the dividing claw 9 of the rod 8, the phase position of the sun gear 5 and thus the rotation shaft 23 is adjusted as described above. Mechanism 2
This can be done by displacing at 0.

That is, when the phase position of the sun gear 5 and thus the rotating shaft 23 is shifted from (D) to (E) using the handle 21 and the hook 25 in the direction opposite to the direction of revolution of the rotating body case 1, the split claw 9 During planting, the posture of the rod 8 changes upward by an angle (θ2) as shown by the dotted line in Fig. 9, and the locus of movement 36' of the dividing claw 9 deviates from that before the displacement, so the amount of seedlings taken out decreases. do. On the contrary, the sun gear 5 and the rotation axis 2
The phase position of 3 is (D) and (F), that is, the rotating body case l.
When the rods 8 are displaced in the same direction as the revolution direction of the split claws 9, the rods 8 will be tilted upward at an angle (
The posture changes by θ3), the movement trajectory of the split claw 9 changes to 36'', and the amount of seedlings taken out increases.
This phase change and thus the adjustment of the amount of seedlings to be taken out can also be performed while the rotating body case 1 is rotating.

In addition, the interlocking gears 13 and 14 having the same number of teeth that interlock and connect the intermediate shaft 11 and the planting shaft 7 are connected to the center of each of these gears (
0') (0") as eccentric gears that are eccentric by an appropriate dimension (e) from the rotation centers of their respective shafts 11' and 7. During planting, the leftward rotation of the shaft 7 becomes faster or slower than the rotation speed of the rotating body 4 due to the diameter difference of the eccentric re-interlocking gears 13 and 14. Therefore, with respect to the revolution of the rotating body 4, planting is performed at a time when the rotation of the axis 7 in the left direction slows down, and planting is performed at a time when the axis 7 descends to approach the field scene 35 of the rod 8. By setting the time when the axis 7 rotates quickly to the left to correspond to the time when the planting rises close to the upper limit of the rise of the rod 8, each planting corresponds to the time when the rod 8 rotates quickly in the left direction. When descending to approach the surface 35, it rotates to the left later than the revolution of the rotating body 4 and changes its attitude downward, and as it approaches the upper limit of ascent, it advances further to the left than the revolution of the rotating body 4. Since each planting rotates on its own axis and changes its posture upward, the closed loop of the movement trajectory of the tip of the split claw 9 of the rod 8 is an elliptical shape elongated in the vertical direction, as shown by the two-dot chain line in Fig. 9. This results in a closed loop curve 36.

The pattern shown in FIG. 8 has a configuration in which the phase is shifted temporally and then automatically returned.

It goes without saying that the safety device of the present invention may be configured to operate independently of the phase adjustment mechanism. For planting, the rod 8 is 21[1i1] of the above embodiment.
It is also possible to arbitrarily divide the number into three or more pieces evenly divided in the circumferential direction.

In the present invention, as in the above embodiment, the extrusion tool 1 is placed on the rod 8 for planting.
7, one or both of the pair of left and right dividing claws 9 can be opened and closed to the left and right, so that when dividing the seedlings and lowering them from the seedling platform 10, the seedlings are held from the left and right sides, and both sides are opened and closed at the lower descending end. Needless to say, the present invention can also be applied to a so-called block claw structure in which the claws are configured to open.

〔Effect of the invention〕

As described above, in the present invention, a sun gear is disposed at the center of the rotating body case in a seedling planting device so that the rotation phase can be freely adjusted by an appropriate angle with respect to the rotating body case,
The sun gear and the planting shaft are interlocked and connected via a planetary gear so that the rotating body case rotates one rotation in the opposite direction to the rotation direction of the rotating body case, while at an appropriate location of the transmission case, A safety device is installed that can temporarily change the rotational phase of the sun gear when the torque acting on the sun gear exceeds a certain level. Even if excessive force is applied and excessive torque is applied to the sun gear, by temporarily changing the phase of the sun gear, the sun gear and planting will be able to prevent abnormalities from occurring in all of the rod 9 rotating body cases. It is possible to avoid applying force and avoid damage to these parts. Therefore, there is no need to increase the rigidity of each of these parts, and there is no need to increase the thickness or other dimensions of each part.
The weight of the rice transplanter can be reduced and the size can be reduced, and the rice transplanter can be made lighter and cost effective.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a plan view of the main part of FIG. 3, FIG. 2 is a side view, FIG. 3 is a plan view of the rice transplanter, and FIG. 4 is a plan view of the main part of FIG. 2. -TV enlarged sectional view, Figure 5 is the 4th
6 is a partially cutaway side view taken along the VH-VR line in FIG. The pattern diagram and FIG. 9 are action explanatory diagrams. ■...Transmission case, 3...Rotating shaft, 4...
Rotating body case, 5...sun gear, 6...cam shaft, 7...planting is shaft, 8...planting is rod, 9...
・Divided claw, 10... Seedling stand, 11... Intermediate shaft,
12... Intermediate gear, 13.14... Interlocking gear,
16...Guide shaft, 17...Extrusion tool, 20...
...Phase adjustment mechanism, 21...Handle, 22...
・Stand, 23... Rotating shaft, 24... Clutch body, 25... Latch is metal, 26... Locking part, 27
... Spline part, 28 ... Safety pressing body, 29
...Spring, 30.31...Claw part, 32...
Crank, 33...Crank arm, 34...
Link. Figure 7 p Figure 6

Claims (1)

[Claims] (1) A rotating shaft that is rotationally driven by power transmission from a power source is pivotally supported in a transmission case in the body of the rice transplanter, and a rotating body case is attached to the rotating shaft, and the rotating body case has the above-mentioned components. One or more planting shafts each having a planting rod with split claws are supported parallel to the rotating shaft on a circumference centered on the rotating shaft, and a sun gear is mounted at a central position within the rotating body case. The sun gear and the planting shaft are arranged so that the rotation phase can be freely adjusted by an appropriate angle with respect to the rotating body case, and the sun gear and the planting shaft are rotated once in a direction opposite to the rotation direction of the rotating body case. A seedling planting device for a rice transplanter, comprising a safety device interlockingly connected to the sun gear via a planetary gear, and capable of temporarily changing the rotational phase of the sun gear when the torque acting on the sun gear exceeds a certain level.