JPH0529404B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is a rice transplanter that uses a rotary type for dividing seedlings one by one from a seedling pine on a seedling platform and then planting the seedlings in a field. The present invention relates to a seedling planting device.

[Conventional technology]

Conventionally, this type of seedling planting device has been used, for example, in the
As described in Publication No. 27762, the base end of a seedling case with a seedling dividing claw at the tip is connected to the fuselage side via a fan link, while the middle part of the seedling case is connected to the engine. The tip of a crank fixed to a rotationally driven claw shaft is pivoted, and the rotation of the crank causes the tip of the divided claw to swing up and down so as to draw a long elliptical closed loop trajectory in the vertical direction. By configuring it so that the seedlings are separated from the seedling pine, the splitting claws do not damage the seedlings, and after the seedlings are planted in the field, the splitting claws quickly escape from the seedlings and stabilize the planting posture of the seedlings. However, this crank-type seedling planting device had problems such as extremely large vibrations due to its vertical swing and slow planting speed.

Therefore, in order to reduce the vibration and improve the planting speed, for example, as described in Japanese Patent Publication No. 17806/1978 and Japanese Patent Publication No. 17807/1989, the machine near the seedling stand should be , a rotating case that is rotationally driven by power transmission from a power source,
A plurality of planting shafts are each pivotally supported on the outer periphery of the rotating case in parallel with the axis, and each planting shaft has a dividing claw. The seedling planting cases equipped with the above-mentioned seedling planting cases are each mounted with their divided claws facing toward the seedling platform side, while the rotating case rotates at an inconstant speed with respect to each of the planting shafts as the rotating case rotates. A mechanism configured to transmit the information is provided, and each of the seedling planting cases is configured to swing and rotate so that the tips of the dividing claws of the seedling planting cases draw vertically long elliptical closed loop loci. A rotary seedling planting device has been proposed.

[Problem to be solved by the invention]

However, in this rotary seedling planting device, the circumferential speed of the tip of the split claw in the seedling planting case is much faster than in the crank type seedling planting device.
Seedlings that were supposed to be planted in the field are often lifted up together with the split claws when the split claws come out of the field, so the reliability of planting seedlings is lower than with the above-mentioned crank type seedling planting device. There was a problem.

An object of the present invention is to solve the above-mentioned conventional problems in a rotary seedling planting device without complicating the structure or increasing the size.

[Means to solve the problem]

In order to achieve this object, the present invention includes a rotating case that is rotatably driven by power transmission from a power source on the machine body near the seedling stand so as to rotate around a substantially horizontal axis, A plurality of planting shafts are each pivotally supported on the outer periphery of the rotating case in parallel with the axis, and each planting shaft is provided with a seedling planting case equipped with a split claw, and the split claw is attached to the seedling stand. Each of the seedling planting cases is mounted in a position facing to the side, and a mechanism is provided in the rotating case to transmit inconstant rotation to each of the planting shafts as the rotating case rotates. In the seedling planting device, the seedlings are placed in each of the seedling cases, and the seedlings are oscillated so that the tips of the split claws in the seedling planting cases draw vertically long elliptical closed loop loci. A pushing tool is provided to push out the seedlings divided by the splitting claws of the planting case towards the tips of the splitting claws, and each of the planting shafts is formed into a hollow shaft, and inside thereof, a pusher is provided that pushes out the seedlings divided by the splitting claws toward the tips of the splitting claws. A drive shaft that is fixed in a non-rotatable manner is inserted, a cam is provided at the insertion portion of the drive shaft into the seedling planting case, and a swinging device is provided in each of the seedling planting cases, one end of which is engaged with the pushing tool. A lever is provided such that the fulcrum of the swinging lever is rotatably pivoted at a portion on the opposite side of the pusher across the cam, and the swinging lever is attached to the neck of the seedling planting case with respect to the cam. It is configured so that it contacts so that it swings and rotates when it is swung and rotated.

〔Example〕

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Below, drawings of an embodiment of the present invention in which the present invention is applied to a walking-type two-row rice transplanter will be described.

In the figure, reference numeral 1 designates a float 6 that slides in the field B on the lower surface of a body 5 that also serves as a transmission case, which is equipped with an engine 2 at the front and a seedling stand 3 and a handle 4 at the rear. A rice transplanter is shown in which wheels 7 are mounted on both the left and right sides of the machine body 5 via a swing case 8, and the machine body 5 of the rice transplanter 1 has a rice transplanter mounted in front of the seedling stand 3, which is rotated by the power from the engine 2. A driven claw drive shaft 9 is supported substantially horizontally, and a rotary seedling planting device 10, which will be described in detail later, is attached to both left and right ends of the claw drive shaft 9.

As shown in FIGS. 3 to 5, this rotary seedling planting device 10 includes an oval-shaped rotating case 11 that is fitted and fixed to the end of a claw drive shaft 9 that is pivotally supported on a machine body 5.
The rotating case 11 is rotated in the right direction by the claw drive shaft 9 as shown by arrow A in a side view of the rice transplanter 1. The sun gear 12
The sun gear 12 is rotatably fitted onto the body 5, and the sun gear 12 is non-rotatably locked to the body 5 via a suitable rotational phase adjusting means 13.

On the outer periphery of the rotating case 11, that is, on both left and right ends, a drive shaft 14 for a pusher (described later) is parallel to the claw drive shaft 9, at a position equal in distance from the claw drive shaft 9. Both drive shafts 14 are fixed to the rotating case 11 in a non-rotatable manner, and a planetary gear 15 having the same number of teeth as the sun gear 12 is rotatably fitted onto both drive shafts 14. has been done. Moreover, inside the rotating case 11,
An intermediate shaft 16 is pivotally supported at an intermediate position between the pawl drive shaft 9 and both drive shafts 14, and an intermediate gear 17 that meshes with both the sun gear 12 and the planet gear 15 is fitted onto both intermediate shafts 16. to constitute a gear train mechanism (in this case, the planetary gear 15 may mesh directly with the sun gear 12).

On the other hand, a hollow planting shaft 18 is rotatably fitted onto both drive shafts 14 in the rotating case 11, and one end of the planting shaft 18 and the driving shaft 14 are projected outside the rotating case 11. The protruding ends of both planting shafts 18 have seedling dividing claws 19 at their tips.
A hollow seedling planting case 20 equipped with the above is fixed in a position where its divided claws 19 face the seedling mounting table 3.

The planetary gears 15 on both drive shafts 14 have pawls 21 projecting toward the planting shaft 18.
The planting shaft 18 is each integrally provided with claws 22 that protrude toward the planetary gear 15, and both claws 21,
22 are configured so that they contact each other when the planetary gear 15 rotates clockwise, and separate from each other when the planetary gear 15 rotates counterclockwise, and between the two pawls 21 and 22, the two pawls 21 and 22 are in contact with each other. A ring-shaped spring body 23 that biases in the corresponding direction is provided, and the ring-shaped spring body 23 is configured to elastically transmit the left rotation of the planetary gear 15 to the planting shaft 18.

On the other hand, each of the seedling planting cases 20 is provided with a hollow guide shaft 27 that extends parallel to the dividing claws 19 and is movable up and down, and a pushing tool 28 is provided at the lower end of the hollow guide shaft 27. A spring 29 is provided inside each of the guide shafts 29 to press and bias the guide shaft 27 downward. A swing lever 30 is disposed inside each of the seedling planting cases 20, and its fulcrum is rotatably pivoted by a pin 31 at a portion on the opposite side of the guide shaft 27 across the drive shaft 14. At the same time, the other end 32 of the swinging lever 30 is rotatably but non-slidably engaged with the upper end of the guide shaft 27, and the pushing tool 28 is moved up and down by the swinging lever 30. Further, the drive shaft 14 is inserted into the seedling planting case 20, and a cam 33 is attached to the drive shaft 14 inside the seedling planting case 20.
is fixed, the swing lever 30 is brought into contact with the outer peripheral surface of the cam 33, and the outer peripheral surface of the cam 33 is
When each of the seedling planting cases 20 comes close to its lower limit as the rotating case 11 rotates, the swinging lever 30 is rotated downward by the pressing force of the spring 29, and each seedling planting case 20 is rotated downward. Case 20 is rotating case 1
The swing lever 30 is configured in such a shape that it rotates upward against the spring 29 when the swing lever 30 moves upward away from the field scene B as the lever 1 rotates.

Furthermore, both intermediate shafts 16 in the rotating case 11
A fan-shaped cam 24 is fixed to each of the sleeve-shaped planting shafts 1 in the rotating case 11.
8 are each integrally provided with a stopper arm 25, and as the seedling planting case 20 rotates in the direction of arrow A, the seedling planting case 20 closes the seedling mounting table 3 on the side facing the seedling mounting table 3. The height position corresponding to the lower end of (that is, the position where the rotating case 11 is approximately horizontal)
to a position slightly before the lower limit (in other words, the position where the dividing claw 19 has penetrated into the field scene B to a predetermined depth)
Only in the section where the sleeve-shaped planting shaft 18 descends to
6, the left rotation of the planting shaft 18 is delayed only in the above-mentioned section.

In this configuration, when the rotating case 11 in the seedling planting device 10 revolves in the direction of arrow A by the claw drive shaft 9, the seedling planting case 20 is attached to the planting shaft 18 fitted on the drive shaft 14 at both ends. The planting shaft 18, to which the seedling planting case 20 is attached, revolves around the claw drive shaft 9, and the planting shaft 18 has a planetary gear 15 and a spring body 2.
3, and the planetary gear 15 meshes with the sun gear 12 via the intermediate gear 17 to form a gear train mechanism with the sun gear 12. 15, and the planetary gear 15 and the planting shaft 18 connected thereto rotate by the same rotation angle as the rotation angle of the revolution as the rotating case 11 revolves in the direction of arrow A. Since it rotates around the drive shaft 14 in a direction opposite to the direction of arrow A, both seedling planting cases 20 rotate in the direction of arrow A while facing the direction of the seedling platform 3. During the turning movement, when descending from top to bottom on the side facing the seedling platform 3, the dividing claw 19 at the tip divides only one seedling from the seedling pine on the seedling platform 3, and then the lower limit of descent is reached. The tip of the dividing claw 19 enters into the field scene B in the vicinity of , and then rises above the field scene B.

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 facing the seedling stand 3
However, as shown in FIG. 5, the cam 2 on the intermediate shaft 16
4, and the seedling planting case 20 stops rotating in the direction opposite to the arrow A from this point, so that the seedling planting case 20 rotates in the direction of the arrow A.
(However, the planetary gear 15 rotates in the direction opposite to arrow A, and the pawls 21 and 22
The seedling case 20 separates against the spring body 23, and elastic force is stored in the spring body 23), and as the rotating case 11 revolves in the direction of arrow A, the dividing claws 19 of the seedling planting case 20 move toward the field surface. It changes its posture so that it is approximately perpendicular to B and enters into field scene B.

When the stopper arm 25 comes off the arcuate outer peripheral surface 26 of the cam 24 as the rotation case 11 revolves in the direction of arrow A, the seedling case 20
Due to the elastic force of the spring body 23, the split claws 19 are rotated back around the planting shaft 14 in the direction opposite to the arrow A, and this return rotation causes the dividing claws 19 to rotate in the rice transplanter 1 after planting the seedlings in the field area B. The seedling planting case 20 moves in the opposite direction to the direction of movement, that is, away from the planted seedlings, leaves the field scene B and rises, and eventually returns to its original position, so the movement trajectory of the tip of the split claw 19 at this time As shown by the two-dot chain line in Fig. 7, becomes an elliptical closed loop curve D that is elongated in the vertical direction,
For example, a vertically elongated elliptical closed loop curve similar to that of the crank-type seedling planting device described in Japanese Patent Publication No. 49-27762 is obtained.

That is, when the two seedling planting cases 20 in this case descend toward the field scene B with their split claws 19 holding the seedlings, they change their posture vertically and enter the field scene B, and after planting, the seedlings are removed from the field scene B. When it leaves, it rises while escaping away from the planted seedlings, so it is possible to reliably plant the seedlings in field scene B in the correct posture.

Also, while the rotating case 11 is revolving in the direction of the arrow A, each seedling case 20 rotates in the opposite direction to the arrow A with respect to the drive shaft 14, so that in each seedling case 20, the The swinging lever 30 in contact with the cam 33 changes the shape of the cam 33 due to the pressing force of the spring 29 when the seedling planting case 20 reaches its lower limit where the tip of the split claw 19 enters into the field area B. 8, the pushing tool 28 at the lower end of the guide shaft 27 moves forward toward the tip of the dividing claw 19, as shown by the two-dot chain line in FIG. , Seedling field scene B
Planting is carried out by pushing the cam 33 inward, and when the planting is finished, the pushing tool 28 is pushed against the spring 29 based on the shape of the cam 33, almost at the same time as the split claw 19 comes out of the field scene B. The dividing claw 19 moves backward from its tip and returns to its original position (the position shown by the solid line in FIG. 8).

Note that in the above embodiment, the cam 24 of the intermediate shaft 16
and the stopper arm 25 of the planting shaft 18,
A case has been shown in which the rotation by the planetary gear 15 of the seedling planting case 20 is delayed with respect to the revolution of the rotation case 11, thereby transmitting inconstant rotation to the planting shaft 18. Figure and 11th
As shown in the figure, a cam gear 24a having an arcuate outer peripheral surface 26a and a toothless part 26b is fixed on a part of the circumference on the intermediate shaft 16, while a cam gear 24a having a part of the circumference on the planting shaft 18 is fixed on the intermediate shaft 16. A toothless type stopper gear 25a with some of the teeth cut out is provided, and by these, the same effect as described above is performed.
The present invention may be configured to transmit inconstant rotation to the planting shaft 18 as the rotation of the seedling case 2 occurs.
Of course, the present invention is applicable not only to cases in which 0 is attached, but also to cases in which three or more seedling planting cases are attached.

[Action/effect of the invention]

As described above, in a rotary seedling planting device that can plant seedlings in a field at a high speed, the present invention provides a split claw in each seedling case with a pushing tool that is operated by swinging the head of the case. By providing this, the extruder can prevent the seedlings once planted in the field from being lifted up together with the splitting claws that have a high circumferential speed, so the reliability of planting seedlings in the field can be greatly improved. It is.

Moreover, as described above, in order to improve the reliability of seedling planting using a push-out tool, the planting shaft to which the seedling planting case is attached is formed into a hollow shape, and the push-out tool is placed inside the planting shaft. By inserting a drive shaft for operation, the structure can be simplified compared to the case where the planting shaft of the seedling case and the drive shaft of the extruder are provided at different positions, and the structure can be simplified. This can prevent the device from becoming larger.

In addition, when a swinging lever is provided in each of the seedling planting cases to operate the push-out tool by swinging the seedling planting case, the fulcrum of the swinging lever is Because the swinging lever is pivoted on the opposite side of the push-out tool across the cam it contacts, the distance from the cam to the push-out tool is shorter than when the swing lever's pivot point is provided between them. This, together with the fact that the drive shaft is inserted into the hollow planting shaft, makes each seedling planting case smaller and lighter, and by extension,
This has the effect of making the entire seedling planting device smaller and lighter.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a side view of a rice transplanter, FIG. 2 is a plan view of the rice transplanter, FIG. 3 is a cross-sectional view of the seedling transplanting device, and FIG. 4 is a cross-sectional view of the rice transplanter. 5 is a cross-sectional view of FIG. 3, FIG. 6 is a diagram showing the operating state of FIG. 5, FIG. 7 is a diagram showing the movement locus of the seedling planting case, and FIG. 3 is an enlarged sectional view of FIG. 9, and FIG. 9 is an enlarged sectional view of FIG. 8.
FIG. 10 is a diagram showing another embodiment of the seedling planting device;
FIG. 1 is a diagram showing the operating state of FIG. 10. DESCRIPTION OF SYMBOLS 1... Rice transplanter, 9... Claw drive shaft, 10... Rotary seedling transplanting device, 11... Rotating case, 12... Sun gear, 14
... Drive shaft, 15 ... Planetary gear, 16 ... Intermediate shaft, 17
...Intermediate gear, 18...Planting shaft, 19...Divided claw, 2
0... Seedling planting case, 21, 22... Claw, 23... Spring body, 24... Cam, 25... Stopper arm, 24
a...Cam gear, 25a...Stopper gear, 27...
Guide shaft, 28... Pusher, 29... Spring, 30
...Swinging lever, 33...cam.

Claims (1)

[Claims] 1. A rotating case, which is rotationally driven by power transmission from a power source, is arranged on the machine body near the seedling stand so as to rotate around a substantially horizontal axis, and a plurality of Each of the book planting shafts is supported in parallel with the axis, and a seedling planting case equipped with a split claw is attached to each of the planting shafts with the split claw facing toward the seedling stand. ,
A mechanism is provided in the rotating case to transmit inconstant rotation to each of the planting shafts as the rotating case rotates, and each of the seedling planting cases is
In the seedling planting device, the seedling planting device is configured such that the tip of the splitting claw in the seedling planting case swings and rotates so as to draw a long elliptical closed loop locus in the vertical direction. A pushing tool is provided to push out the seedlings divided by the splitting claws toward the tips of the splitting claws,
Each of the planting shafts is formed into a hollow shaft, into which a drive shaft fixed non-rotatably to the rotating case is inserted, and a cam is provided at the insertion portion of the drive shaft into the seedling planting case. Further, in each of the seedling planting cases, a swinging lever having one end engaged with the pushing tool is rotatably pivoted with the fulcrum of the swinging lever being at a portion opposite to the pushing tool with the cam in between. A seedling planting device for a rice transplanter, characterized in that the swinging lever is in contact with the cam so as to be swingingly rotated by the swinging rotation of the seedling planting case.