JPH0620372B2 - Rice planting equipment for rice transplanters - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a rice transplanter, which is a rice transplanter for dividing seedlings from a seedling mat on a seedling mounting table into individual seedlings and then planting the seedlings in a field. It is about.

[Conventional technology]

Conventionally, this type of seedling planting apparatus is disclosed in, for example, Japanese Patent Publication No. Sho-49-277.
As described in Japanese Patent Laid-Open No. 62-62, the base end of a planting rod having a split claw at the tip is connected to the fuselage side via a fan link, while the middle part of the planting rod is driven to rotate by an engine. It is pivotally attached to the tip of a crank fixed to a claw shaft, and the rotation of the crank causes the planting rod to swing up and down so that the tip of the split claw draws a closed loop trajectory.

However, in this conventional vertical rocking type seedling planting device, the dividing claws attached to the planting rod are oriented in the direction of the seedling mounting table, as compared with the rotary type that is described in, for example, Japanese Utility Model Publication No. 33-18922. Since it moves up and down with the posture facing to, it has the feature that it can be planted on the seedlings taken out from the seedling mounting table with the dividing claws in a substantially vertical manner in the field scene, but it has a more vigorous planting rod than the rotary type. Vibration is generated due to the vertical rocking, and this vibration increases in proportion to the speed of the vertical rocking, and this vibration is one per vertical rocking, that is, one rotation per crank rotation. The planting speed could not be increased because only a single seedling could be planted.

Therefore, the inventor of the present invention has previously filed a patent application (Japanese Patent Application No. 59-125).
No. 881) is based on a rotary type, and the tips of the split claws in a plurality of planting rods attached to the rotating body case are configured to pivot vertically with the posture state facing the seedling table. By doing so, we proposed a seedling planting device that has the features of both a rotary type and a vertical swing type planting device.

[Problems to be solved by the invention]

Even in this kind of seedling planting device, if the splitting claws of the planting rod hit the stones in the field and excessive force is applied to the planting rod or the splitting claws during rotation of the rotating body case, the revolving case of the rotating body is revolved. Unless it rotates so that the rotation angle of the planting rod that rotates in the direction opposite to the direction becomes larger than that in the normal case, excessive force acts on each member such as the rotating body case and the planting rod and they are damaged. There was a fear.

[Means for solving problems]

Therefore, according to the present invention, a rotary shaft that is rotatably driven by power transmission from a power source is rotatably supported by a transmission case of a rice transplanter machine, and the rotary case is attached to the rotary shaft. , The planting shaft is pivotally supported at equal points on the circumference centering on the rotation axis, and the planting rods with the split claws are attached to the respective planting shafts, and the split claws between the plantings are mounted on the machine body. On the other hand, the sun gear is arranged at a central position in the rotating body case so that the rotation phase can be adjusted by an appropriate angle with respect to the transmission case while being mounted so as to face the direction of Each planting shaft is interlocked and coupled through a planetary gear so that each planting shaft makes one rotation in the opposite direction to the rotation direction during one rotation of the rotating body case, and the torque acting on the sun gear becomes a certain value or more. If this happens, temporarily change the rotation phase of the sun gear. It was constituted say further to be provided with a safety device.

[Work]

In this way, when the rotating body case in the seedling planting device rotates, each planting shaft that is interlocked via the planetary gear that meshes with the sun gear provided at the center of the rotating body case rotates in the opposite direction to the rotating direction of the rotating body case, The planting rod with split claws attached to each planting shaft turns around the rotation axis of the rotating body case while facing the direction of the seedling table.

During the downward movement of this turning motion, for example, when a pebbles hits this during the insertion of the split claw in the field scene and a force that pushes up the planting rod in the direction opposite to the descending direction acts, the planetary gears are moved. Since a certain degree of rotation torque is applied to the sun gear via the sun gear, by rotating the sun gear to a certain degree via this safety torque, an excessive torque due to the upward force applied to the planting rod is exerted. You can escape.

Then, since each planting rod rotates so that its split claws move up and down while facing the direction of the seedling table, the lower surface of each planting rod always moves up and down while facing the field scene direction.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.
In the figure, reference numeral 1 indicates a transmission case in the body of the rice transplanter, 10 indicates a seedling stand, and the body advances in the direction of the arrow in FIG.

On the side surface of the transmission case 1, a boss body 2 is projected rearward from the seedling placing table 10 in a horizontal direction and substantially parallel to the seedling placing table 10, in other words, in a left-right direction substantially perpendicular to the traveling direction of the machine body. Into the boss body 2, a rotary shaft 3 which is rotationally driven by power transmission from an engine (not shown) mounted on the body of the rice transplanter is inserted, and the rotary shaft 3 from the boss body 2 is inserted. An oval-shaped and hollow rotating body case 4 is fitted to the protruding end, and the rotating body case 4 is configured to rotate in the right direction of arrow A in a side view.

A sun gear 5, which is rotatably fitted to the boss body 2 and configured to be rotatable with respect to the rotor case 4, is arranged at the center of the rotor case 4.
Is locked to the transmission case 1 by a rotation phase adjusting mechanism 20 described later so that the phase can be adjusted.

As shown in FIG. 4, the cam shaft 6 is provided at both left and right ends of the rotating body case 4 at positions where the distance (L) from the rotating shaft 3 is equal.
Is rotatably supported in parallel with the rotating shaft 3 and non-rotatably with respect to the rotating body case 4, a hollow planting shaft 7 is rotatably fitted on the cam shaft 6, and one end of the planting shaft 7 is attached. A hollow planting rod 8 having a split claw 9 projecting to the outside of the rotating body case 4 and extending toward the seedling mounting table 10 is attached to the projecting end of each planting shaft 7 at the base thereof. On the other hand, in the rotating body case 4, an intermediate shaft 11 is rotatably supported at a position intermediate between the rotating shaft 3 and each of the planting shafts 7 so as to be rotatable 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.

The interlocking gear 13 having the same number of teeth as the intermediate gear 12 is fitted on the intermediate shaft 11, while the interlocking gear 13 on the intermediate shaft 11 has the same number of teeth as the toothing on the planting shaft 7. By interlocking the interlocking gear 14 that constantly meshes with this, and interlockingly connecting the intermediate shaft 11 and the planting shaft 7 with the interlocking gears 13 and 14, the planting shaft 7 is rotated by one rotation of the rotating body case 4. It is configured to rotate once in a direction opposite to the rotating direction of the rotating body case 4.

On the other hand, a guide shaft 16 extending substantially parallel to the split claw 9 is provided on each of the planting rods 8 so as to be vertically slidable, and an extruding tool 17 is fixed to the lower end of the guide shaft 16 to form a hollow shape. Each of the planting rods 8 is associated with the cam shaft 6 and the slider at the upper end of the guide shaft 16 via an interlocking mechanism (not shown) such as an extrusion lever arranged in the planting rod 8. Is pushed to the vicinity of its lower limit, the pushing lever is rotated downward by the spring force so that the seedlings sandwiched by the front split claws 9 can be forcibly planted in the field scene.

The rotation phase adjusting mechanism 20 of the sun gear 5 is provided at an appropriate position of the transmission case 1, and can adjust the phase position of the sun gear 5 with respect to the transmission case 1 by revolving the handle 21 from the outside. Is configured. That is, as shown in FIGS. 6 and 7, a rotation shaft 23 is rotatably supported by a stand 22 standing upright outside the transmission case 1, and is rotatably supported by the rotation shaft 23. A latch 25 is provided along the handle 21 protruding from one end of the fitted clutch body 24 so that the latch 25 can be engaged with and disengaged from an arbitrary portion of a locking portion 26 formed on the stand 22 at appropriate intervals. Meanwhile, the spline portion 27 of the rotating shaft 23
The safety pressing body 28 slidably fitted on the safety pressing body 2 is elastically urged to one side of the clutch body 24 by a spring 29 force.
8, the claw portion 30 formed on one side surface of the clutch body 24 and the claw portion 31 formed on one side surface of the clutch body 24 are engaged with each other.
A link 32 connects a crank 32 that rotates integrally with the rotating shaft 23 and a crank arm 33 that extends from the sun gear 5.
Are interlocked with each other, and the handle 21 is rotated to engage the latch 25 with an arbitrary locking portion 2 of the stand 22.
It is possible to set and adjust the phase position of the sun gear 5 by engaging with the gear 6. Further, 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 amount or more acts on the sun gear 5. Is a safety device for releasing the excessive torque, and when the sun gear 5 rotates with a rotation torque of a certain level or more,
The safety pressing body 28, which moves integrally via the link 34, the crank 32, and the rotating shaft 23, is configured to deviate from the pawl portion 31 of the clutch body 24 by a certain angle against the force of the spring 29. FIG. 8 is a development view showing an example of a meshing pattern of the claw portion 30 formed on one side surface of the safety pressing body 28 and the claw portion 31 formed on one side surface of the clutch body 24.

In this structure, when the rotating body case 4 revolves in the right direction of the arrow A by the rotating shaft 3, the intermediate gear 12 meshing with the sun gear 5 that cannot rotate with respect to the transmission case 1 revolves around the rotating body case 4. Accordingly, the planting shaft 7 that rotates in the right direction of the arrow B by the same rotation angle as the rotation angle of the revolution and that is interlocked with the intermediate gear 12 via the interlocking gears 13 and 14.
Is rotated by the rotation of the intermediate gear 12 in the left direction of the arrow C, that is, in the direction opposite to the revolving direction of the rotating body 4, so that the split rod 9 of the planting rod 8 attached to the planting shaft 7 is shown in FIG. As shown in the figure, while keeping the posture of facing the seedling mounting table 10, the rotary shaft 3 is pivotally moved, and the split claw 9 in the planting rod 8 is indicated by a chain double-dashed line in FIGS. 2 and 9. A closed loop-shaped motion locus 36 shown will be drawn.

During this turning motion, when the side facing the seedling mounting table 10 is lowered from the top to the bottom, the tip of the split claw 9 causes the seedling mounting table 1 to move.
After splitting only one seedling from the seedling mat on 0, a seedling is planted in the field scene 35 in the vicinity of the lower limit of descending, and thereafter, it rises from the field scene 35.

Then, during the revolution of the rotating body case 4 in the right direction of the arrow A, each planting rod 8 rotates about the cam shaft 6 in the left direction of the arrow C, that is, in the direction opposite to the revolving direction of the rotating body case 4. Thus, the guide shaft 16 is moved by the compulsory planting mechanism in each planting rod 8 so that the split claws 9 are separated at the lower limit of lowering of the planting rod 8.
When the tip of the seeds moves downward in the field scene 25, the pusher 17 at the lower end of the guide shaft 16 moves downward toward the tip of the split claw 9 to push the seedlings into the field scene 25. Plant in this way. When the push-in planting is completed, the push-out tool 17 returns to the original position retracted from the tip of the split claw 9 almost at the same time when the split claw 9 rises from the field scene 35.

When the tip of the split claw 9 of the planting rod 8 in the descending direction during such seedling planting work collides with a small stone mixed in the field scene 35, the planting rod 8 is directed upward from the lower end direction of the split claw 9. Is applied, and as shown in FIG. 9, it rotates upward by an appropriate angle (θ1) as compared with the normal case.
In other words, the sun gear 5 is rotated through the planetary gear groups 12, 13, and 14 because it rotates by an angle (θ1) in the direction opposite to the normal rotation of the planting rod 8 in the direction opposite to the revolution of the rotating body case 4. Excessive torque is applied than in the normal case. Therefore, the crank arm 33 attached to the crank arm 33 is rotated leftward as shown by the alternate long and short dash line in FIG. Against the force of the spring 29, the angle shifts from the claw portion 31 of the clutch body 24, and an excessive torque applied to the sun gear 5 can be temporarily released.

Further, in order to increase or decrease the amount of seedlings taken out from the seedling mat on the seedling mounting table 10 by the split claws 9 of the planting rod 8, the phase position of the sun gear 5 and by extension the rotary shaft 23 is adjusted to the phase adjusting mechanism 2.
It can be done by displacing at 0.

That is, when the phase position of the sun gear 5 and, by extension, the rotary shaft 23 is displaced by the handle 21 and the latch 25 from (D) to (E) in the direction opposite to the revolving direction of the rotating body case 1, the split claw 9 is attached. As shown by the dotted line in FIG. 9, the posture of the rod 8 changes upward by an angle (θ2), and the movement locus 36 'of the split claw 9 deviates from that before displacement, so that the seedling removal amount decreases. On the contrary, the sun gear 5 and then the rotary shaft 2
3 from (D) to (F), that is, the rotor case 1
When the revolving direction of the split claw 9 is displaced in the same direction, the planting rod 8 with the split claw 9 changes its posture upward by an angle (θ3) as shown by the dotted line in FIG. ″ ”, The seedling removal amount increases, and this phase change and thus the seedling removal amount can be adjusted even while the rotating body case 1 is rotating.

In addition, the interlocking gears 13 and 14 having the same number of teeth that interlock the intermediate shaft 11 and the planting shaft 7 with each other, and the centers (O ′) (O ″) of these gears are the rotation centers of the respective shafts 11 and 7. If the eccentric gear is eccentrically eccentric by the dimension (e), the rotation of the planting shaft 7 to the left along with the revolution of the rotating body 4 to the right will be eccentric during one rotation. Since the difference in diameter between the two interlocking gears 13 and 14 makes the rotation speed of the rotating body 4 faster or slower, the rotation of the rotating body 4 to the left of the planting shaft 7 is increased. The time when the rotation becomes slower, the time when the planting rod 8 descends so as to approach the field scene 35, and the time when the rotation of the planting shaft 7 to the left becomes faster, rises so as to approach the upper limit of the raising of the planting rod 8. By setting so as to correspond to each time period, each planting rod 8 becomes When descending so as to approach, it lags behind the revolution of the rotating body 4 to the left and rotates freely, changing its posture downward, and when approaching the upper limit of the rise, it moves further leftward than the revolution of the rotating body 4 and rotates on its own. Since the posture is changed upward, the closed loop of the locus of movement of the tip end of the split claw 9 of each planting rod 8 becomes a slender elliptical closed loop curve 36 in the vertical direction as shown by the chain double-dashed line in FIG. Of.

The pattern of FIG. 8 has a configuration in which the phase is temporarily displaced and then automatically restored.

Needless to say, the safety device of the present invention may be configured to operate independently regardless of the phase adjusting mechanism. Further, the number of the planting rods 8 is not limited to the two in the above-mentioned embodiment, and it is also possible to arbitrarily make a plurality of three or more in the circumferential direction.

According to the present invention, as in the above-mentioned embodiment, the pushing tool 1 is attached to the planting rod 8.
Not only the one provided with 7, but one or both of the pair of left and right split claws 9 can be opened and closed to the left and right, and when the seedlings are divided from the seedling placing table 10 and descended, the seedlings are sandwiched from the left and right, and both ends are lowered. It goes without saying that the present invention can also be applied to a so-called block claw structure in which the claw is opened.

〔The invention's effect〕

As described above, according to the present invention, the sun gear is arranged at the center position in the rotating body case in the seedling planting device so that the rotation phase can be adjusted by an appropriate angle with respect to the transmission case. While linking the planting shaft and each of the planting shafts via a planetary gear so that each planting shaft makes one rotation in the opposite direction to the rotation direction during one rotation of the rotating body case, while at an appropriate location of the transmission case, A safety device is provided that can temporarily change the rotation phase of the sun gear when the torque acting on the sun gear becomes a certain value or more, whereby an excessively large planting rod rotates together with the rotating body case. Even when a force acts and an excessive torque is applied to the sun gear, by temporarily changing the phase of the sun gear, the sun gear, the planting rod,
It is possible to prevent an abnormal force from being applied to all of the rotating body cases, and it is possible to avoid damage to each of these parts.

Therefore, it is not necessary to make the rigidity of each of these parts excessive, and it is not necessary to take large dimensions such as the thickness of each part, and the weight can be made light and small, and the weight and cost of the rice transplanter can be reduced. Has the effect of reducing

[Brief description of drawings]

The drawings show an embodiment of the present invention. Fig. 1 is a plan view of a main part of Fig. 3, Fig. 2 is a side view, Fig. 3 is a plan view of a rice transplanter, and Fig. 4 is IV of Fig. 2. -IV enlarged sectional view, FIG. 5 is a sectional view taken along line VV of FIG. 4, FIG. 6 is a partially cutaway side view taken along line VI-VI of FIG. 1, and FIG. 7 is a view VI-VI. FIG. 8 is a pattern diagram of a claw portion of the safety device, and FIG. 9 is an operation explanatory diagram. 1 ... Transmission case, 3 ... Rotating shaft, 4 ... Rotating body case, 5 ... Sun gear, 6 ... Cam shaft, 7 ... Planting shaft,
8: Planting rod, 9: Dividing claw, 10: Seedling table, 11
...... Intermediate shaft, 12 ...... Intermediate gear, 13,14 ...... Interlocking gear, 16 ...... Guide shaft, 17 ...... Extruder, 20 ...... Phase adjusting mechanism, 21 ...... Handle, 22 ...... Stand, 23
...... Rotary shaft, 24 ...... Clutch body, 25 …… Latch, 2
6 ... Locking part, 27 ... Spline part, 28 ... Safety pressing body, 29 ... Spring, 30, 31 ... Claw part, 32 ... Crank, 33 ... Crank arm, 34 ... Link.

Claims (1)

[Claims] 1. A rotary shaft rotatably driven by power transmission from a power source is rotatably supported by a transmission case of a rice transplanter machine.
A rotating body case is attached to the rotating shaft, and in the rotating body case, planting shafts are pivotally supported at equal positions on the circumference centered on the rotating shaft, and planting rods with split claws are attached to the respective planting shafts. ,
While the split claws between the plants are attached so as to face the seedling mounting table attached to the machine body, the sun gear is rotated at an appropriate angle with respect to the transmission case at the center position in the rotating body case. The sun gear and each of the planting shafts are arranged so as to be adjustable, and through the planetary gears such that each of the planting shafts makes one rotation in the direction opposite to the rotation direction during one rotation of the rotating body case. A seedling planting device for a rice transplanter, which is interlocked and provided with a safety device capable of temporarily changing the rotational phase of the sun gear when the torque acting on the sun gear becomes a certain value or more.