JP2637718B2 - 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 seedling plant for dividing rice plants one by one from a seedling mat on a seedling mounting table in a rice transplanter and then planting the seedlings in a field. .

[0002]

2. Description of the Related Art Conventionally, this kind of seedling planting apparatus has, as described in, for example, Japanese Patent Publication No. 49-27762, attaches the base end of a seedling plant having a divided claw of a seedling to a tip thereof on an airframe side. While being connected via an agitation link, the middle of the seedling is pivotally connected to the tip of a crank fixed to a claw shaft that is driven to rotate by an engine, and the rotation of the crank separates the seedling. By constructing the tip of the nail to swing up and down so as to draw a long elliptical closed-loop trajectory in the vertical direction, the seedling is not damaged when the seedling is split from the seedling mat, and the seedling is split after planting in the field scene The nails quickly escaped from the seedlings to stabilize the planting posture of the seedlings.

[0003] However, this crank type seedling planting apparatus has problems such as large vibrations due to its vertical swing and a low planting speed. Therefore, in order to reduce the vibration and improve the planting speed, a so-called rotary seedling plant in which a seedling case with split claws is attached to the outer periphery of the rotary case is disclosed in, for example, Japanese Patent Publication No. Sho 49-17806. And Japanese Patent Publication No. 49-17807.

[0004]

However, in this rotary seedling plant, the seedling case is swung so that the tip of the split claw draws a locus of an elliptical closed loop that is long in the vertical direction. A mechanism is required, and conventionally, this swinging rotation is performed by a crank mechanism provided between a planting shaft to which the seedling case with split claws is attached and a rotation transmitting mechanism for the planting shaft. Make up. However, if the mechanism for swinging and swinging the seedling case is a crank mechanism, the torque variation is large, so the planting posture of the seedling with respect to the field scene is unstable, and the vibration is sufficiently reduced. However, there is a problem that the durability is low.

SUMMARY OF THE INVENTION It is a technical object of the present invention to solve the above-mentioned conventional problems in a rotary seedling plant without complicating and enlarging the structure of a rotary case.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above technical object, the present invention provides a claw shaft which is horizontally supported by a body in the vicinity of a seedling mounting table and horizontally transmitted to a power source from a power source. The rotating case is mounted by fitting a mounting boss portion integrally provided on a side plate on the opposite side of the body between the left and right side plates of the rotating case to the claw shaft. At a plurality of locations on the circumference around the claw axis in the case, a planting axis parallel to the claw axis is rotatably supported, and a seedling case having a split claw is provided on each of the planting axes. A seedling device whose split claws are mounted in a posture facing the seedling mounting table side, wherein a sun gear provided non-rotatably at the center of the rotating case in the rotating case; With the rotation of the rotating case between the planting axis By providing a gear train adapted to transmit unequal speed rotation to each planting shaft, the seedling case is drawn such that the tips of the split claws in the seedling case draw a locus of an elliptical closed loop that is long in the vertical direction. On the other hand, the mounting boss portion of the rotating case is projected inward, and the front end surface of the boss portion on the body side of the boss portion is connected to the body of the left and right side surfaces of the sun gear. Is configured to be in contact with the opposite side surface. "

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below with reference to the drawings in which the embodiments are applied to a walking type two-row rice transplanter.
In the figure, reference numeral 1 denotes an airframe 5 serving also as a transmission case, having an engine 2 at the front and a seedling mounting table 3 and a handle 4 at the rear.
A float 6 is provided on the lower surface of the vehicle for sliding in a field scene B.
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.

The rotary seedling plant 10 is shown in FIGS.
As shown in FIG. 1, a hollow rotary case 11 is provided at an end of a claw shaft 9 that is pivotally supported with respect to the machine body 5. As shown by A, the rotating case 11 is rotated rightward, and the rotating case 11 is integrally provided on a side plate 11a on the opposite side of the body 1 among the left and right side plates 11a and 11b of the rotating case 11. The mounting boss 11c is fitted to the end of the claw shaft 9 to be attached to the claw shaft 9. A sun gear 12 is rotatably fitted on the claw shaft 9 in the rotating case 11, and the sun gear 12 is a sleeve 12a integrated with the sun gear 12.
The left and right side plates 11a, 1
By protruding from the side plate 11b on the side of the fuselage 1b toward the fuselage 1b, it is non-rotatably locked to the fuselage 5 via an appropriate rotation phase adjusting means 13.
It is configured to be held non-rotating. In this case, the mounting boss portion 11c of the rotary case 11 with respect to the claw shaft 9 protrudes inward, and its end surface is formed on the opposite side of the left and right sides of the sun gear 12 from the body 1. It is configured to contact.

At the outer peripheral portion of the rotating case 11, that is, at both left and right end portions, a position where the distance from the claw shaft 9 is equal,
A drive shaft 14 for an extruder (to be described later) is supported in parallel with the claw shaft 9, and both drive shafts 14 are fixed non-rotatably to the rotating case 11, and are mounted on the drive shafts 14. The planetary gear 15 having the same number of teeth as the sun gear 12 is rotatably fitted. In the rotating case 11, an intermediate shaft 16 is supported at an intermediate position between the claw shaft 9 and the two drive shafts 14. On both the intermediate shafts 16, both the sun gear 12 and the planetary gear 15 are provided. By fitting the meshing intermediate gear 17, the gears 12, 17, 15, the cam gear 24 a and the missing tooth stopper gear 25 a, which will be described later, cause the drive shaft 14 to rotate with the rotation of the rotary case 11. A gear train configured to transmit unequal-speed rotation to the planting shaft 18 fitted on the sun gear 12 (in this case, the planetary gear 15 may directly mesh with the sun gear 12).

On the other hand, a planting shaft 18 of a hollow shaft is rotatably fitted on both the driving shafts 14 in the rotating case 11, and one end of the planting shaft 18 and the driving shaft 14 are
At the protruding ends of the planting shafts 18, a hollow seedling case 20 having splitting claws 19 for seedlings is provided at the projecting ends, and the split claws 19 face the seedling mounting table 3. Position and fix each.

The planetary gears 15 on the two drive shafts 14 have pawls 21 projecting toward the planting shafts 18.
A claw 22 protruding toward the planetary gear 15 is integrally provided on the planting shaft 18, and the claws 21 and 22 are brought into contact with each other when the planetary gear 15 rotates clockwise, so that the planetary gear 15
Are configured to separate from each other when they rotate to the left,
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 case 20 is provided with a hollow guide shaft 27 extending in parallel with the dividing claws 19 so as to be movable up and down.
The pusher 28 is provided with a spring 29 therein for urging the guide shaft 27 downward. Also,
A lever-type operating body 30 is arranged in each seedling case 20, and one end of the operating body 30 is pivotally connected to a pin 31 so as to be freely rotatable, while the other end 32 is pivoted to the upper end of the guide shaft 27. The pusher 28 is freely and non-slidably engaged so that the pusher 28 moves up and down by the vertical rotation of the operating body 30. Further, the drive shaft 14 is inserted into the seedling plant case 20, A cam 33 is fixed to the drive shaft 14 in the seedling case 20,
An intermediate portion of the operating body 30 is brought into contact with the outer peripheral surface of the cam 33, and the outer peripheral surface of the cam 33 is attached to each of the seedling cases 2.
The operating body 30 is configured to rotate downward only when 0 comes close to its lower limit.

Further, the two intermediate shafts 16 in the rotating case 11 are provided with a circular arc-shaped outer peripheral surface 26a and a missing tooth in a part of the circumference at a portion on the left and right sides of the intermediate gear 17 opposite to the body 5. Gear 24a having a portion 26b
(Large Diameter) is fitted, and the toothless stopper gear 25a (Small Diameter), which is partially cut off on the circumference, is attached to the both mounting shafts 18 in the rotating case 11. The gear 25a is fitted so as to mesh with the cam gear 24a, and the seedling case 20 is placed on the side facing the seedling table 3 with the rotation of the rotating case 11 in the direction of arrow A. A position slightly below the lower limit from the height position corresponding to the lower end of the base 3 (that is, the position where the rotating case 11 is substantially horizontal) (that is, the position where the split claw 19 has entered the field scene B to a predetermined depth) In the section descending to the intermediate shaft 16, the arc-shaped outer peripheral surface 26 a of the cam gear 24 a of the intermediate shaft 16 is connected to the toothless stopper gear 2 of the planting shaft 18.
By contacting the missing tooth portion in 5a, the left rotation of the planting shaft 18 is delayed in the section.

In this construction, when the rotating case 11 of the seedling plant 10 revolves around the claw shaft 9 in the direction of arrow A, 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 substantially horizontal, the seedling case 20 on the side facing the seedling mounting table 3 has an arc-shaped outer peripheral portion 26a of the cam gear 24a of the intermediate shaft 16 as shown in FIG. As shown in FIG. 7, one end of the tooth portion of the toothless stopper gear 25a of the planting shaft 18 abuts, and the rotation of the seedling case 20 in the direction opposite to the arrow A is stopped from this point, so that the seedling can be planted. The rotation of the case 20 in the direction opposite to the arrow A 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 arrow A, and Are separated from each other against the spring body 23, and the spring body 23 stores elastic force.) With the rotation of the rotating case 11 in the direction of the arrow A, the split claws 19 of the seedling case 20 The posture is changed so that it is almost vertical to Entering the plane B.

As the rotary case 11 revolves in the direction of arrow A, the teeth of the large-diameter cam gear 24a on the intermediate shaft 16 become the teeth of the small-diameter toothless stopper gear 25a on the planting shaft 18. , The planting shaft 18 rotates at a higher speed than the intermediate shaft 16 based on the diameter ratio between the large-diameter cam gear 24a and the small-diameter toothless stopper gear 25a. Axis 18
The seedling case 20 to be mounted on the drive shaft 1
After the seedlings are planted in the field scene B, the split claws 19 move in the opposite direction to the traveling direction of the rice transplanter 1, that is, move away from the seedlings after planting. Goes out of B, rises, and seedlings 2
0 returns to the original posture, and the movement trajectory of the tip of the split claw 19 at this time becomes an elliptical closed loop curve D elongated in the vertical direction as shown by a two-dot chain line in FIG. A closed loop curve having the same shape as that of the crank type seedling plant described in JP-B-49-27762 can be obtained.

That is, the two seedling plant cases 20 here
When the split claw 19 descends toward the field scene B while holding the seedling, the posture is changed vertically and enters the field scene B,
When the child leaves the field scene B after planting, it rises while escaping away from the seedling after planting, so that the planting of the seedling in the field scene B can be reliably performed under the correct posture.

Also, during the rotation of the rotating case 11 in the direction of arrow A, each seedling case 20 rotates in the direction opposite to the arrow A with respect to the planting shaft 14 so that each seedling case 2
At 0, the lever 33 which comes into contact with the cam 33 on the planting shaft 14 is based on the shape of the cam 33 when the seedling case 20 comes to the lowermost lower limit where the tip of the divided claw 19 enters the field scene B. 8, the pusher 28 at the lower end of the guide shaft 27 descends toward the tip of the split claw 19 as shown by a two-dot chain line in FIG.
The seedlings are planted so as to be pushed into the field scene B. When the pushing and planting is completed, the pushing tool 28 is almost at the same time as the split claw 19 comes out of the field scene B, and the pushing tool 28 is retreated from the tip of the split claw 19 to the original position. (The position indicated by the solid line in FIG. 8).

It should be noted that the present invention is not limited to the case where two seedling cases 20 are mounted on one rotating case 11, but can be applied to a case where three or more seedling cases are mounted.

[0020]

As described above, according to the present invention, the rotation is provided between the sun gear provided in the rotating case at the center of the rotating case in a non-rotating manner and each of the planting shafts. Providing a gear train that transmits unequal speed rotation to each planting shaft with the rotation of the case, the seedling case,
The tip of the split claw in the seedling case is swung and swung so as to draw a locus of an elliptical closed loop that is long in the vertical direction, so that the seedling case can be moved like the conventional rotary seedling device. Compared to the one that swings and swings via a crank mechanism, the torque fluctuation when swinging the seedling seedling case is small, and the planting posture of the seedling with respect to the field scene can be stabilized, and the vibration can be reduced. Can be greatly reduced, and the durability can be improved.

In addition to the above, according to the present invention, as described above, the mounting boss portion for the claw shaft of the rotating case is projected inward, and the tip end surface of the boss portion on the side of the fuselage is formed in the sun gear. The rotation case is attached to the claw shaft by mounting the boss to the claw shaft. Without protruding significantly from the side surface of the rotating case, and thus without increasing the thickness of the rotating case.
A thrust load on the sun gear in a direction opposite to the fuselage can be supported by the mounting boss portion, and a thrust load on the sun gear in a direction opposite to the fuselage on the sun gear is supported inside the rotating case. Can be omitted, the structure of the rotating case can be simplified, and the number of components can be reduced.
This also has the effect of reducing the weight and, consequently, the size and weight of the rotary seedling plant.

[Brief description of the drawings]

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 plant.

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;

FIG. 5 is a sectional view taken along line VV of FIG. 3;

FIG. 6 is a diagram showing an operation state of FIG. 5;

FIG. 7 is a diagram showing a locus of movement of a seedling plant.

FIG. 8 is an enlarged sectional view taken along line VIII-VIII of FIG. 3;

9 is a sectional view taken along the line IX-IX in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rice transplanter 3 Seedling stand 9 Claw shaft 10 Rotary seedling plant 11 Rotation case 11a, 11b Right and left side plates 11c of rotation case 11c Mounting boss 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 24a Cam gear 25a Missing tooth stopper gear

Claims (1)

(57) [Claims] (1) The aircraft is horizontally orientated near a seedling mounting table.
The claw shaft that is supported and transmitted from the power source has a hollow
Shape of the rotating case, the left and right sides of the rotating case
Of the plates, provided integrally on the side plate opposite to the aircraft
By fitting the mounting boss to the claw shaft
At this time, a plurality of planting axes parallel to the claw axis are rotatably supported at a plurality of positions on the circumference around the claw axis in the rotating case, and each of the planting axes is provided with a divided claw. In a seedling-planting device comprising a seedling case mounted with its split claws facing the seedling table side, the seedling case is not rotated around the center of the rotating case .
Between the sun gear held and provided and each of the planting shafts
In addition, a gear train that transmits unequal speed rotation to each of the planting shafts with the rotation of the rotating case is provided, and the seedling case is moved up and down with the tip of the split claw in the seedling case. while configured to swing rotation so as to draw a locus of a long elliptical loop, put on the rotary case
Project the mounting boss part inward and attach it to the boss part.
The tip surface on the fuselage side of the sun gear
Make sure to contact the side opposite to the fuselage on both sides.
NaeUe device in rice transplanter, characterized in that formed was.