JP2521889B2 - 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 each planting shaft is provided with a split claw. The case was mounted such that its split claws were oriented toward the seedling mounting table side, while at the same time transmitting non-constant speed rotation to each of the planting shafts in the rotary case as the rotary case rotated. In the seedling planting device, a mechanism is provided, and each of the seedling planting cases is configured to swing and rotate 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 vertical direction. , To each seedling planting case, An extruding tool for extruding seedlings divided by the dividing claws toward the tip of the dividing claws is provided, and the pushing out tool is provided in each of the seedling planting cases in accordance with the swinging rotation of the seedling planting cases. Further, an actuating body for actuating the actuating body is provided, and each of the planting shafts is formed as a hollow shaft, and a drive shaft for the actuating body is inserted into the hollow shaft, and the drive shaft is fixed to the rotating case, while A boss portion is formed on the side surface on the rotating case side of each seedling planting case, the boss portion is fitted to the planting shaft, and the seedling planting case is attached to the planting shaft. The drive shaft is rotatably inserted into the bearing hole formed in the side surface on the opposite side.

[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, and both drive shafts 14 are non-rotatably fixed to the rotating case 11 and on the both drive shafts 14. A planetary gear 15 having the same number of teeth as the sun gear 12 is rotatably fitted therein. An intermediate shaft 16 is pivotally supported in the rotary case 11 at an intermediate position between the pawl shaft 9 and both drive shafts 14, and both the sun gear 12 and the planetary gear 15 are supported on the intermediate shafts 16. The rotating gear 1 is fitted with the meshing intermediate gear 17, and the gears 12, 15, 17 and the cam 24 and the stopper arm 25, or the cam gear 24a and the toothless stopper gear 25a, which will be described later, are used.
With the rotation of 1, the mechanism for transmitting non-uniform speed rotation to each planting shaft 18 described later is configured.

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. In the respective positions, the male screw portion 1 is attached to the outer periphery of the projecting end of the planting shaft 18 as shown in FIG.
8a is provided, a mounting boss portion 20a having an internal thread portion 20b on the inner circumference is integrally formed on the side surface of the seedling planting case 20 on the side of the rotating case 11, and the mounting boss 20a is attached to the planting shaft. The female screw portion 20b is attached to the protruding end of the screw shaft 18 so that the female screw portion 20b is screwed into the male screw portion 18a of the planting shaft 18. A lock nut 18b for tightening the boss portion 20a is screwed onto the male screw portion 18a. On the other hand, a bearing hole 20c is formed in a side surface of each seedling planting case 20 opposite to the rotating case 11, and the end of the drive shaft 14 is rotatably inserted into the bearing hole 20c.

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 of the seedling planting cases 20, one end of which is rotatably supported by a pin 31 while the other end 32 is fixed to the upper end of the guide shaft 27. Between the two flanges 34 and 35 described above, the flange 28 is rotatably and non-slidably engaged, and the push-up tool 28 is vertically moved by the vertical rotation of the actuating body 30. The drive shaft 14 is inserted into the seedling planting case 20, a cam 33 is fixed to the drive shaft 14 in the seedling planting case 20, and the intermediate portion of the actuating body 30 is abutted on the outer peripheral surface of the cam 33. In addition, the outer peripheral surface of the cam 33 is formed in such a shape that the actuating body 30 rotates downward only when the seedling planting cases 20 come near the lower limit of their descending. . Reference numeral 38 is a cushion body.

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.
33 that contacts the cam 33 on the drive shaft 14 at
In the seedling planting case 20, the tip of the split nail 19 is in the field scene B.
When it reaches the lower limit of the downward movement to enter the inside, it rotates in the downward direction based on the shape of the cam 33. Therefore, the pushing tool 28 at the lower end of the guide shaft 27 is shown by a two-dot chain line in FIG. 8 by this rotation. As described above, the seedlings are planted by pushing down into the tip of the split claws 19 and pushing the seedlings into the field scene B. When the pushing and planting is finished, the split claws 19 are removed from the field scene B at substantially the same time, The pushing tool 28 returns to the original position (the position shown by the solid line in FIG. 8) retracted from the tip of the split claw 19.

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. 11 and 12, on the intermediate shaft 16, a cam gear 24a having an arc-shaped outer peripheral surface 26a and a toothless portion 26b is fixed on 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-mentioned configuration (the planting shaft for mounting the seedling planting case is formed into a hollow shaft, and the drive shaft for the actuating body of the pushing tool is inserted therein), By providing a detachable attachment part for the planting shaft at a portion between the seedling planting case and the rotating case, the length of the planting shaft can be made shorter than the length of the drive shaft. The effect is that the diameter of the planting shaft can be reduced and the weight can be reduced.

In addition, a boss portion is formed on the side surface of the seedling planting case on the side of the rotating case, the boss portion is fitted on the planting shaft, and the planting case is mounted on the planting shaft. In the bearing hole formed in the side surface portion on the side opposite to the rotating case in the seedling planting case, by inserting the drive shaft rotatably, each seedling planting case, the rotating case side of the left and right side surfaces, By the planting shaft that is fitted to the drive shaft,
Of the left and right side surfaces, the opposite side to the rotating case is to be supported by the drive shafts inserted into the planting shafts respectively, so that the strength of the supporting portion of each seedling planting case can be significantly increased. The weight reduction and the durability can be improved.

[Brief description of drawings]

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

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

FIG. 3 is a cross-sectional 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 of a seedling plant.

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.

10 is a cross-sectional view taken along line XX of FIG.

FIG. 11 is a diagram showing another embodiment of the seedling planting device.

FIG. 12 is a diagram showing an operating state of FIG. 11.

[Explanation of symbols]

 1 Rice transplanter 9 Claw shaft 10 Rotary seedling planting device 11 Rotating case 12 Sun gear 14 Drive shaft 15 Planetary gear 16 Intermediate shaft 17 Intermediate gear 18 Planting shaft 19 Split 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 Push-out tool 29 Spring 30 Actuator 33 Cam 18a Shaft end 20a Boss 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. Part, a plurality of planting shafts are axially supported in parallel with the axis, and a seedling planting case equipped with split claws is attached to each planting shaft in a posture in which the split claws face the seedling table. On the other hand, in the rotating case, by providing a mechanism for transmitting non-constant speed rotation to each planting shaft with the rotation of the rotating case, each of the seedling planting case in the seedling planting case In a seedling planting device configured to swing and rotate so that the tip of the split claw draws a locus of an elliptical closed loop that is long in the vertical direction, in each seedling planting case, the split claw in the seedling planting case is used. Push the divided seedlings toward the tips of the split claws A push-out tool adapted to move is provided, and in each of the seedling planting cases, an actuating body for actuating the push-out tool in accordance with swinging rotation of the seedling planting case is provided, and further, each of the planting shafts is a hollow shaft. In the inside, a drive shaft for the actuating body is inserted therein, and while the drive shaft is fixed to the rotating case, a boss portion is formed on the side surface on the rotating case side of each seedling planting case, The boss portion is fitted to the planting shaft, the seedling planting case is mounted on the planting shaft, and further, in the bearing hole formed in the side surface portion of the seedling planting case opposite to the rotating case, A seedling planting device in a rice planting machine, wherein a drive shaft is rotatably inserted.