JPH0518523B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] 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 stand and then planting the seedlings on 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 plant having a seedling dividing claw at the tip is connected to the fuselage side via a fan link, while the middle part of the seedling plant is connected to the engine. The tip of a crank, which is fixed to a claw shaft that is rotationally driven by the crank, is pivoted, and the rotation of the crank causes the seedling plant to be vertically swung so that the tips of the split claws draw a long elliptical closed loop locus in the vertical direction. By configuring it in a crank type to move it,
The system was structured so that the seedlings were separated from the seedling pine on the seedling stand and then planted in the field, but this system had problems such as large vibrations due to the up-and-down movement and slow planting speed. It was hot.

Therefore, recently, in order to reduce vibration and improve planting speed, for example,
As stated in Publication No. 17806 and Special Publication No. 17807, etc., the aircraft near the seedling stand,
A rotating case that is rotationally driven by power transmission from a power source is arranged so as to rotate around a substantially horizontal axis, and a plurality of planting shafts are installed on the outer periphery of the rotating case parallel to the axis. A seedling plant with split claws is mounted on each planting shaft with the split claws facing toward the seedling stand. A gear train is provided that transmits inconstant rotation to each of the planting shafts as it rotates, and each seedling plant is connected to an elliptical closed loop in which the tips of the dividing claws of the seedling plant are long in the vertical direction. A rotary seedling planting device has been proposed that is configured to swing its head so as to draw a trajectory.

[Problem to be solved by the invention]

However, compared to the crank-type seedling planting device, this rotary seedling planting device has the advantage of having less vibration and being able to greatly increase the seedling planting speed. Because the circumferential speed of the tip is fast, seedlings that were once planted in the field are often lifted up together with the split claws when the split claws come out of the field, making the planting of seedlings less reliable. There was a problem that it was lower than the above-mentioned crank type seedling planting device.

An object of the present invention is to solve the above 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 of the planting shafts is provided with a seedling plant having a dividing claw, and the dividing claw is attached to the seedling stand. While each is attached in a posture facing the side, inside the rotating case,
A gear train is provided that transmits inconstant rotation to each of the planting shafts as the rotating case rotates, and each seedling plant is arranged so that the tips of the dividing claws in the seedling plant are vertically aligned. In a seedling planting device configured to swing and rotate so as to draw a long elliptical closed loop locus, the seedlings that have been divided by a dividing claw in each seedling plant are placed at the tips of the dividing claws. A pushing tool is provided in the rotary case so that the pushing tool is operated in accordance with the swinging movement of each seedling plant, and a drive shaft is attached to the rotation case so that the pushing tool is operated along the axis line. The drive shaft is mounted in parallel with the drive shaft, and at least one gear of the gear train is supported by the drive shaft.

〔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 swing cases 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 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 the left and right sides, 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. ing. In addition, an intermediate shaft 1 is provided in the rotation case 11 at an intermediate position between the pawl drive shaft 9 and both drive shafts 14.
6 is pivotally supported, and a sun gear 1 is mounted on both intermediate shafts 16.
2 and the planetary gear 15.
7 to form a gear train mechanism (in this case,
The planetary gear 15 may mesh directly with the sun gear 12).

On the other hand, a sleeve-shaped 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. A hollow seedling planting body 20 having a seedling dividing claw 19 at its tip is fixed to the protruding ends of both planting shafts 18 with the dividing claw 19 facing toward the seedling platform 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 seedling plant 20 has its divided claws 19.
A hollow guide shaft 27 extending in parallel with the guide shaft 27 is provided to be movable up and down, and a pushing tool 28 is provided at the lower end of the hollow guide shaft 27,
7 are each provided with a spring 29 that presses them downward. A swing lever 30 is disposed inside each of the seedling plants 20, and one end of the swing lever 30 is rotatably connected with a pin 31, while the other end 32 is rotatably attached to the upper end of the guide shaft 27. The drive shaft 14 is configured to engage freely and non-slidably so that the pushing tool 28 moves up and down as the swinging lever 30 moves up and down. , 20 seedling plants
A cam 33 is fixed to the drive shaft 14 inside,
The middle part of 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 rotated only when each of the seedling plants 20 comes near its lower limit. The swing lever 30 is configured in a shape that allows it to pivot downward. In this case, the other end 32 of the swing lever 30 is engaged between the two collars 34 and 35 fixed to the upper end of the guide shaft 27, and both the collars 34 and 35 are attached to the inside of the seedling plant 20. It is slidably fitted into a cylinder bore 36 formed concentrically with the axis of the guide shaft 27, and a cushion body 38 made of rubber is provided at the portion of the bearing 37 relative to the guide shaft 27. There is.

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 the seedling plant 20 is moved along the arrow A of the rotating case 11.
As it rotates in the direction, on the side facing the seedling platform 3, from a height position corresponding to the lower end of the seedling platform 3 (that is, a position where the rotating case 11 is approximately horizontal) to a position slightly before the lower limit of descent. position (that is, dividing claw 19
The stopper arm 25 of the sleeve-shaped planting shaft 18 comes into contact with the arcuate outer circumferential surface 26 of the cam 24 on the intermediate shaft 16 only in the section where the planting shaft 18 descends to the position where the seeding material penetrates into the field area B to a predetermined depth. Accordingly, the configuration is such that 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 body 20 attached to the planting shaft 18 fitted on the drive shafts 14 on both sides thereof is The planting shaft 18, which revolves around the claw drive shaft 9, to which the seedling plant 20 is attached, is elastically connected to the planetary gear 15 via a spring body 23, and the planetary gear 15 is connected to the intermediate gear 1.
7 meshes with the sun gear 12, and the sun gear 1
A gear train mechanism is constructed between the sun gear 12 and the planetary gear 15, and the sun gear 12 and the planetary gear 15 have the same number of teeth.
8 rotates around the drive shaft 14 in a direction opposite to the direction of arrow A by the same rotation angle as the rotation angle of the rotation case 11 in the direction of arrow A. The plant 20 turns in the direction of arrow A while facing the direction of the seedling stand 3, and during this turning movement, when it descends from top to bottom on the side facing the seedling stand 3,
After dividing only one seedling from the seedling pine on the seedling stand 3 with the dividing claw 19 at the tip, the tip of the dividing claw 19 enters into the field scene B near the lower limit, and then the field scene B. It will rise even more.

In this case, when the rotating case 11 is in a substantially horizontal state, the seedling plant body 20 on the side facing the seedling platform 3
The stopper arm 25 of the planting shaft 18 is the fifth
As shown in the figure, when the cam 24 on the intermediate shaft 16 comes into contact with the arcuate outer circumferential surface 26, the rotation of the seedling plant 20 in the direction opposite to the arrow A is stopped from this point. This is because the rotation of the rotating case 11 in the direction opposite to the arrow A is delayed relative 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, (The seedling plant 20 separates against the spring body 23, and elastic force is stored in the spring body 23.) As the rotating case 11 revolves in the direction of the arrow A, the seedling planting body 20 moves its divided claws 19 toward the field scene B.
, it changes its posture so that it is approximately vertical and enters the field scene B.

When the stopper arm 25 comes off the arc-shaped outer peripheral surface 26 of the cam 24 as the rotation case 11 revolves in the direction of the arrow A, the seedling plant 20 is moved in the opposite direction to the arrow A by the elastic force of the spring body 23. After the seedlings have been planted in the field scene B, the dividing claws 19 are rotated back around the planting shaft 14, and this rotation causes the dividing claws 19 to move in the opposite direction to the direction of movement of the rice transplanter 1, that is, to move away from the seedlings after planting. The seedling plant 20 moves up and leaves the field scene B, and eventually returns to its original position, so the movement trajectory of the tip of the split claw 19 at this time is vertical, as shown by the two-dot chain line in FIG. It becomes an elliptical closed loop curve D elongated in the 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 plants 20 here 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, they move from the field scene B. When it leaves, it rises while escaping away from the planted seedlings, making it possible to reliably plant the seedlings in field scene B under the correct conditions.

Further, while the rotation case 11 is revolved in the direction of arrow A, each seedling plant 20 rotates in the direction opposite to arrow A with respect to the drive shaft 14, so that each seedling plant 20
When the swinging lever 30, which comes into contact with the cam 33 on the drive shaft 14, reaches the lower limit where the tip of the splitting claw 19 of the seedling plant 20 enters the field area B,
Since the cam 33 rotates downward based on the shape of the cam 33, this rotation causes the pushing tool 28 at the lower end of the guide shaft 27 to move as shown by the two-dot chain line in FIG.
Planting is carried out by descending toward the tip of the split claw 19 and pushing the seedling into the field scene B. When this pushing-in planting is completed, the split claw 19 moves into the field scene B.
Almost at the same time as the pusher 28 is removed from the splitting claw 19, the pushing tool 28 returns to its original position (the position shown by the solid line in FIG. 8), where it was retreated from the tip of the splitting claw 19.

Note that in the above embodiment, the cam 24 of the intermediate shaft 16
and the stopper arm 25 of the planting shaft 18,
By delaying the rotation of the seedling plant 20 by the planetary gear 15 with respect to the revolution of the rotating case 11,
Although the case where inconstant speed rotation is transmitted to the planting shaft 18 is shown, instead of this method, as shown in FIGS. A cam gear 24a having a surface 26a and a toothless portion 26b is fixed, and a toothless stopper gear 25a with some teeth cut out on the circumference is provided on the planting shaft 18. In other words, it may be configured to transmit inconstant speed rotation to the planting shaft 18 as the rotating case 11 rotates. It goes without saying that the present invention is not limited to a case in which two seedling planting bodies 20 are attached to a case, but can also be applied to a case in which three or more seedling cases are attached.

[Action/effect of the invention]

As described above, in the rotary seedling planting device, the present invention divides the seedlings into each seedling plant using the dividing claws of the seedling plant by swinging the head of the seedling plant. By providing a push-out device that operates toward the tip of the blade, it is possible to prevent the seedlings once planted against the field from being lifted up together with the splitting claws, which have a high circumferential speed, making it easier to plant seedlings. This can definitely improve the reliability of

Moreover, the present invention provides a rotary seedling planting device that includes:
By providing a pushing tool in each of the seedling plants, the reliability of seedling planting is improved. By configuring the shaft to support at least one gear of the gear train, the drive shaft can be used both for operating the pushing tool and supporting at least one gear in the gear train. Compared to the case where the rotary seedling transplanter and the support shaft of at least one gear are provided separately, the structure is simpler and the number of parts is reduced, making the rotary seedling planting device smaller and lighter.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which 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 side 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 trajectory of the seedling plant, and FIG. 3 is an enlarged cross-sectional view of FIG. 8, and FIG. 9 is a cross-sectional view of FIG.
FIG. 0 is a cross-sectional view taken from FIG. 8, FIG. 11 is a diagram showing another embodiment of the seedling planting device, and FIG. 12 is a diagram showing the operating state of FIG. 11. 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 ... Division claw, 20 ... Seedling planting body, 21,2
2...Claw, 23...Spring body, 24...Cam, 25
...Stopper arm, 24a...Cam gear, 2
5a... Stopper gear, 27... Guide shaft, 2
8... Pushing tool, 29... Spring, 30... Rocking 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 A book planting shaft is each supported in parallel with the axis, and a seedling plant with a split claw is mounted on each of the planting shafts with the split claw facing toward the seedling stand. , a gear train configured to transmit inconstant rotation to each of the planting shafts as the rotating case rotates is provided in the rotating case, and each seedling plant is divided into the seedling plants. In a seedling planting device configured such that the tip of the claw swings and rotates so as to draw a long elliptical closed loop locus in the vertical direction, each of the seedling plants is divided by a dividing claw in the seedling plant. A pushing tool is provided in the rotary case so as to push out the separated seedlings toward the tips of the splitting claws, and the pushing tool is mounted in the rotating case so that the pushing tool is operated in accordance with the swinging rotation of each seedling plant. A seedling transplanting device for a rice transplanter, characterized in that a drive shaft is mounted parallel to the axis, and furthermore, at least one gear of the gear train is supported by the drive shaft.