JP2501096B2 - 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, a seedling planting apparatus of this type has a base end of a seedling plant having a split claw for seedling on the tip side of the machine body as described in Japanese Patent Publication No. 49-27662. While connecting through an agitating link, the middle part of the seedling plant is pivotally attached to the tip of a crank fixed to a claw shaft that is rotationally driven by an engine, and the seedling plant is divided by the rotation of the crank. By configuring the tip of the claw to crank up and down so as to draw a locus of an elliptical closed loop that is long in the vertical direction, it does not damage the seedling when splitting the seedling from the seedling mat,
After planting the seedlings in the field, the split nails quickly escaped from the seedlings to stabilize the planting posture of the seedlings.

However, this product has a problem that it vibrates greatly due to its vertical swing and the planting speed is slow. Therefore, in order to reduce the vibration and improve the planting speed, a so-called rotary seedling planting device in which a seedling plant with split claws is attached to the outer peripheral portion of the rotating case is disclosed in, for example, Japanese Patent Publication No. Sho 49-17806. Gazette and Japanese Patent Publication Sho 49-17
No. 807, etc.

That is, in this rotary type seedling planting device, a rotating case which is rotationally driven by power transmission from a power source to a machine near the seedling mounting base is rotated about a horizontal horizontal axis. A plurality of planting shafts are provided on the outer peripheral portion of the rotary case in parallel with the axis, and a seedling planting case having a split claw is provided on each planting shaft. While installing in a posture toward the seedling mounting table side, in the rotating case, provided with a mechanism for transmitting non-constant speed rotation to each of the planting axes in accordance with the rotation of the rotating case, each of the seedlings The planting case is constructed so that the tip of the split claw in the seedling planting case swings and pivots so as to draw a locus of an elliptical closed loop that is long in the vertical direction.

[0005]

However, in this rotary type seedling planting apparatus, as compared with the crank type seedling planting apparatus,
While it has less vibration and has the advantage that the planting speed of seedlings can be greatly increased, the peripheral speed of the tip of the split nail in each seedling planting case is fast, so seedlings that should have been planted in the field once have split nails. There was a problem in that the seedlings were often lifted together with the split claws when coming out of the field scene, and the certainty of planting seedlings was lower than that of the crank type seedling planting device.

[0006] It is a technical object of the present invention to surely solve the above-mentioned problems in a rotary type seedling planting device without causing a complicated structure and an increase in size.

[0007]

In order to achieve this technical object, the present invention provides a "rotating case, which is rotatably driven by power transmission from a power source, to a machine near a seedling stand in a substantially horizontal direction. Is arranged so as to rotate around the axis line, and a plurality of planting shafts are axially supported on the outer peripheral portion of the rotating case in parallel with the axis line, and at the projecting end of each planting shaft from the rotating case. While mounting the seedling planting case having the split claws in a posture in which the split claws face the seedling mounting table side, the split claws are installed in the rotary case with respect to the planting shafts as the rotary case rotates. By providing a mechanism for transmitting constant-speed rotation, each of the seedling planting cases is swung so that the tip of the dividing claw in the seedling planting case draws a locus of an elliptical closed loop that is long in the up-down direction. In the seedling planting device configured as described above, On the base, a push-out tool for pushing the seedlings divided by the dividing claws in the seedling planting case toward the tip of the dividing claws is provided, while forming each of the planting shafts into a hollow shaft and , The drive shaft is rotatably inserted, and one end of the drive shaft is fixed to the rotary case. A part of the drive shaft inside the seedling planting case is swung with the swinging movement of the seedling planting case. A cam for operating the pushing tool is provided, and a side surface plate of the seedling planting case opposite to the rotating case is bored through a bearing hole, and the other end of the drive shaft is provided in the bearing hole. To
The other end is rotatably inserted so that a part of the other end projects from the bearing hole. "."

[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 drive shaft 14 for an extruding tool (described later) is rotatably supported in parallel with the pawl shaft 9. One end of each of the drive shafts 14 is non-rotatably fixed to the rotating case 11, and both drive shafts 14 are attached. Above the planetary gear 15 has the same number of teeth as the sun gear 12.
Are rotatably fitted. Also, the rotating case 1
An intermediate shaft 16 is rotatably supported in the gear 1 at an intermediate position between the pawl shaft 9 and both drive shafts 14, and an intermediate gear 17 meshing with both the sun gear 12 and the planetary gear 15 is provided on both intermediate shafts 16. And each of these gears 12, 15, 17 and a cam 2 described later.
4 and the stopper arm 25 or the cam gear 24a
The toothless stopper gear 25a constitutes a mechanism for transmitting non-constant speed rotation to each planting shaft 18, which will be described later, as the rotating case 11 rotates.

On the other hand, a hollow planting shaft 18 is rotatably fitted on both drive shafts 14 in the rotating case 11 so that one end of the planting shaft 18 and the drive shaft 14 are
A hollow seedling planting case 20 having projecting claws 19 for seedlings is provided at the projecting ends of both the planting shafts 18 so as to project toward the outside of the rotating case 11. The seedling planting case 20 is placed in each position and attached.
It is attached to the projecting end of the planting shaft 18 by a boss portion 20b integrally formed on the side surface of the rotating case 11 side. On the other hand, the bearing hole 2 is formed in the side plate 20a of the seedling planting case 20 opposite to the rotating case 11.
0c is pierced and the other end 14a of the drive shaft 14 is rotatably inserted into the bearing hole 20c so that a part of the other end 14a protrudes from the bearing hole 20c. To do.

The planetary gears 15 on the two drive 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 seedling planting case 20 is provided with a hollow guide shaft 27 extending in parallel with the split claw 19 by a bearing 37 so as to be vertically movable. An extruding tool 28 is provided at the lower end, and a spring 29 for urging the guide shaft 27 downward is provided therein. A lever-type actuating body 30 is provided in each seedling planting case 20, one end of which is rotatably supported by a pin 31, and the other end 32 of which is on the upper end of the guide shaft 27. The pusher 28 is configured to move up and down by pivoting and non-sliding engagement so that the actuating body 30 moves up and down, and further, the drive shaft 14 is connected to the seedling planting case 2
0, the cam 33 is fixed to the drive shaft 14 in the seedling planting case 20, the intermediate portion of the actuating body 30 is abutted on the outer peripheral surface of the cam 33, and the cam 33 The outer peripheral surface is formed in such a shape that the actuating body 30 rotates downward only when each of the seedling planting cases 20 comes near the lower limit of its descending.

Further, fan-shaped cams 24 are fixed to both the intermediate shafts 16 in the rotating case 11, and stopper arms 25 are integrally provided in the both planting shafts 18 in the rotating case 11, respectively. The seedling planting case 20,
A height position corresponding to the lower end of the seedling mounting table 3 on the side facing the seedling mounting table 3 with the rotation of the rotating case 11 in the direction of arrow A (that is, a position where the rotating case 11 is substantially horizontal).
From a position slightly lower than the lower limit of descent (that is, the position where the split claw 19 has entered the field scene B to a predetermined depth), the stopper arm 25 of the planting shaft 18 causes the cam 24 on the intermediate shaft 16 to move. By making contact with the arc-shaped outer peripheral surface 26 at, the left rotation of the planting shaft 18 is delayed only in the above 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 to the drive 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 around the drive shaft 14 in the direction opposite to the arrow A direction by the same rotation angle as the rotation angle of the rotation case 11 in accordance with the revolving rotation of the rotating case 11 in the arrow A direction. The planting case 20 makes a turning movement in the direction of arrow A in a state facing the seedling mounting table 3. During this turning movement, when the planting case 20 descends from the top on the side facing the seedling mounting table 3, After splitting one seedling from the seedling mat on the seedling mounting table 3 with the splitting nail 19 at the tip, the tip of the splitting nail 19 enters the field scene B near the lower lower limit, and then the field scene B It rises more.

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 planting case 20 on the side facing the seedling platform 3 has an intermediate position as shown in FIG. By contacting the arc-shaped outer peripheral surface 26 of the cam 24 on the shaft 16 and stopping the rotation of the seedling planting case 20 in the direction opposite to the arrow A from this point, the direction opposite to the arrow A of the seedling planting case 20 is stopped. 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 pawls 21 and 22 resist the spring body 23). The elastic force is stored in the spring body 23), and the seedling planting case 20 is indicated by the arrow A of the rotating case 11.
With the revolution in the direction, the posture of the split claw 19 is changed so as to be substantially vertical to the field scene B, and the split claw 19 enters the field scene B.

When the stopper arm 25 is disengaged from the arcuate outer peripheral surface 26 of the cam 24 with the rotation of the rotating case 11 in the direction of arrow A, the seedling case 20 is moved in the direction opposite to arrow A by the elastic force of the spring body 23. Is rotated around the planting shaft 14, and this return rotation causes the split claws 19 to rotate.
After planting the seedlings in the field scene B, it moves away from the field scene B while moving in a direction opposite to the advancing direction of the rice transplanter 1, that is, moving away from the seedlings after planting, and eventually the seedling plant 20 returns to its original state. Since the posture returns to the posture, the movement locus of the tip of the split claw 19 at this time becomes an elliptical closed loop curve D which is long in the up-down direction as shown by the chain double-dashed line in FIG. 7. For example, Japanese Patent Publication No. 49-27762. A closed loop curve having the same shape as that of the crank type seedling planting device described in the publication etc. can be obtained.

While the rotating case 11 revolves in the direction of arrow A, each seedling planting case 20 rotates about the drive shaft 14 in the direction opposite to the arrow A, so that each seedling planting case 20 is rotated.
When the seedling planting case 20 reaches the lower limit of descending at which the tip of the split claw 19 enters into the field B, the lever-type actuating body 30 that contacts the cam 33 on the drive shaft 14 in Since it rotates in the downward direction based on the shape, the pushing tool 28 at the lower end of the guide shaft 27 descends toward the tip of the split claw 19 as shown by the chain double-dashed line in FIG. The seedlings are planted so as to be pushed into the field scene B, and when this pushing and planting is completed, the push-out tool 28 moves the split claws 1 almost at the same time when the split claw 19 comes out of the field scene B.
It returns to the original position (the position shown by the solid line in FIG. 8) retracted from the tip of 9.

In the above embodiment, the cam 2 of the intermediate shaft 16 is used.
4 and the stopper arm 25 of the planting shaft 18 delay the rotation of the seedling plant 20 by the planetary gear 15 with respect to the revolution of the rotating case 11 to transmit non-constant rotation to the planting shaft 18. However, changing to this method,
As shown in FIGS. 10 and 11, on the intermediate shaft 16, a cam gear 24a having an arc-shaped outer peripheral surface 26a and a toothless portion 26b is fixed to a part of the circumference, while on the planting shaft 18. , A toothless stopper gear 2 with a part of the circumference notched
5a is provided and by these, the seedling planting case 20 is pivotally rotated so as to perform the same operation as described above, that is, by transmitting the unequal speed rotation to the planting shaft 18 with the rotation of the rotating case 11. Can be configured as
In addition, the present invention is not limited to the case where the two seedling planting cases 20 are mounted on the single rotating case 11, and it is needless to say that the present invention can be applied to the case where three or more seedling planting cases are mounted.

[0020]

As described above, according to the present invention, in the rotary type seedling planting device, the seedlings divided by the split claws in the seedling planting case are swung into the respective seedling planting cases. By providing the pushing tool that is pushed toward the tip of the split claw by rotation, it is possible to prevent the seedling once planted in the field from being lifted together with the split claw having a high peripheral speed. Therefore, the certainty of planting seedlings can be surely improved.

Moreover, the planting shaft for mounting the seedling planting case is formed as a hollow shaft, and the drive shaft for the actuating body of the pushing tool is inserted into the hollow shaft, so that the planting shaft is planted in the rotating case. Compared to the case where the shaft and the drive shaft are provided at different positions, the structure can be simplified and the increase in size can be avoided. Moreover, in addition to the above configuration (forming a planting shaft for attaching a seedling planting case to a hollow shaft and inserting a drive shaft for the actuating body of the pushing tool into the hollow shaft), A cam for activating the pushing tool is provided in a portion inside the seedling planting case, and a side surface plate of the seedling planting case opposite to the rotating case is formed by penetrating a bearing hole. By rotatably inserting the other end of the drive shaft, each seedling planting case can be supported by both the planting shaft and the drive shaft with a cam built in the sandwiching case. The strength of the support portion of the seedling planting case can be greatly increased, its weight can be reduced and its durability can be improved, and since the bearing hole is a through hole, the bearing hole can be easily processed. The cost required for processing It can be reduced.

Moreover, by inserting the other end of the drive shaft into the bearing hole so that a part of the other end projects from the bearing hole, the other end does not project from the bearing hole. As compared with the case of the above configuration, the amount of muddy water entering the bearing hole is reduced, and the durability can be improved.

[Brief description of drawings]

FIG. 1 is a side view of a rice transplanter according to an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a vertical sectional front 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.

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.

FIG. 10 is a diagram showing another embodiment of the seedling planting device.

FIG. 11 is a diagram showing an operation state of FIG. 10;

[Explanation of symbols]

 1 Rice transplanter 9 Claw shaft 10 Seedling planting device 11 Rotating case 12 Sun gear 14 Drive shaft 14a The other end of the drive shaft 15 Planetary gear 16 Intermediate shaft 17 Intermediate gear 18 Planting shaft 19 Dividing claw 20 Seedling case 21, 22 Claw 23 Spring Body 24 Cam 25 Stopper arm 24a Cam gear 25a Stopper gear 27 Guide shaft 28 Pusher 29 Spring 30 Actuator 33 Cam 20c Bearing hole.

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 the seedling mounting table so as to rotate about an axis of a substantially horizontal lateral direction, and an outer periphery of the rotating case. In the part, a plurality of planting shafts are axially supported in parallel with the axis, and a projecting end of each planting shaft from the rotating case is provided with a split claw. While installing in a posture toward the platform side, a mechanism is provided in the rotating case for transmitting non-constant rotation to each of the planting shafts in accordance with the rotation of the rotating case, and each of the seedlings is planted. In a seedling planting device configured to swing and rotate the case so that the tip of the split claw in the seedling planting case draws a locus of an elliptical closed loop that is long in the vertical direction,
Each seedling planting case is provided with an extruding tool for pushing out the seedlings divided by the split claws in the seedling planting case toward the tip of the split claw, while forming each planting shaft into a hollow shaft. , A drive shaft is rotatably inserted therein, one end of the drive shaft is fixed to the rotating case, and a part of the drive shaft inside the seedling planting case swings around the seedling planting case. A cam for operating the push-out tool is provided, and a side surface plate of the seedling planting case on the side opposite to the rotating case is formed by penetrating a bearing hole. The other end is rotatably inserted so that a part of the other end projects from the bearing hole.