JPH06153640A - Seedling-planting machine in rice transplanter - Google Patents

Abstract

PURPOSE:To improve the degree of certainty in seedling planting in the field in a rotary seedling-planting machine in which plural seedling-planting cases each equipped with a dividing tine are set to a rotary case while improving the durability of the structure. CONSTITUTION:A dividing tine 19 is equipped with a push unit 28 designed so as to push seedlings divided thereby toward the top and the push unit is designed so as to move forward and subsequently move backward through a cam 33 set in a seedling-planting case according to an oscillation movement of the seedling-planting case.

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 Heretofore, a seedling planting apparatus of this type has a base end of a seedling planting case having a split claw for seedlings on the side of a machine body as described in, for example, Japanese Patent Publication No. 49-27762. While connecting through an agitating link, the middle part of the seedling planting case is pivotally attached to the tip of a crank fixed to a claw shaft that is rotationally driven by an engine, and the seedling planting case is divided by the rotation of the crank. By configuring the tip of the nail to swing up and down so as to draw a locus of an elliptical closed loop that is long in the vertical direction, the seedling is not damaged during seedling splitting from the seedling mat,
After planting the seedlings in the field, the split claws quickly escaped from the seedlings to stabilize the planting posture of the seedlings.
This crank-type seedling planting device has problems in that it vibrates remarkably due to its vertical swing and the planting speed is slow.

Therefore, in order to reduce the vibration and improve the planting speed, for example, Japanese Patent Publication No. 49-17806.
As described in Japanese Patent Publication No. 49-17807 and Japanese Patent Publication No. 49-17807, a rotating case that is rotationally driven by power transmission from a power source is attached to a machine near a seedling mounting table, about a horizontal horizontal axis line. Are arranged so as to rotate, and a plurality of planting shafts are respectively supported on the outer peripheral portion of the rotating case in parallel with the axis, and a seedling planting case equipped with a split claw is provided on each planting shaft. , A mechanism in which the split claws are respectively mounted in a posture toward the seedling mounting table side, and at the same time, in the rotating case, non-constant rotation is transmitted to each of the planting shafts as the rotating case rotates. Is provided, and each of the seedling planting cases 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. A device has been proposed.

[0004]

However, in this rotary type seedling plant, since the peripheral speed of the tip of the split claw in the seedling plant case is significantly higher than that of the crank type seedling plant, the rotary seedling plant is once used in the field. Since the seedlings that should be planted on the surface often lift together with the split nails when the split nails come out of the field scene, the certainty of planting seedlings is lower than that of the crank type seedling planting device. There was a problem to say.

A technical object of the present invention is to reliably solve the above-mentioned problems of the conventional type in a rotary type seedling planting device by using a highly durable structure.

[0006]

In order to achieve this technical object, the present invention provides a body near a seedling stand with a rotating case which is rotationally driven by power transmission from a power source in a substantially horizontal direction. Arranged so as to rotate about the axis, a plurality of planting shafts are respectively supported on the outer peripheral portion of the rotating case in parallel with the axis, and each planting shaft is provided with a split claw. The cases are mounted so that the split claws thereof are oriented toward the seedling mounting table side, respectively, while transmitting non-constant speed rotations to the planting shafts in the rotary case as the rotary case rotates. By setting up a mechanism that
In the seedling planting device, wherein the tip of the split claw in the seedling planting case is configured to swing and rotate so as to draw a locus of an elliptical closed loop that is long in the vertical direction, the seedling planting case is provided in each of the seedling planting cases. An extruding tool for extruding the seedlings divided by the dividing claw toward the tip of the dividing claw is provided, and the extruding tool is fixed in the seedling planting case so as not to be rotatable with respect to the rotating case. With the provided cam, the push-out tool is moved forward and then backward with the swinging rotation of the seedling planting case.

[0007]

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.
1 shows a rice transplanter mounted via a claw drive shaft 9 rotatably driven by the power from the engine 2 in a horizontal position on the body 5 of the rice transplanter 1 in front of the seedling table 3. A rotary type seedling planting device 10, which will be described later in detail, is attached to the left and right ends of the pawl drive shaft 9 which is pivotally supported.

This rotary type seedling planting apparatus 10 is shown in FIGS.
As shown in FIG. 2, an oval type rotary case 11 fitted and fixed to an end of a pawl drive shaft 9 pivotally supported on the machine body 5 is provided, and the rotary case 11 is mounted on the rice transplanter 1 by the pawl drive shaft 9. As shown by an arrow A in a side view, the sun gear 12 rotates to the right, and the sun gear 12 is rotatably fitted on the pawl drive shaft 9 in the rotating case 11.
2 is an appropriate rotation phase adjusting means 13 for the machine body 5.
It is locked non-rotatably via.

At the outer peripheral portion of the rotating case 11, that is, at the left and right ends, a drive shaft 14 for an extruding tool (described later) is formed at the same distance from the pawl drive shaft 9 as the pawl drive shaft 9. Both drive shafts 14 are rotatably supported in parallel with each other, and are fixed to a side plate 11a of the rotating case 11 opposite to a seedling planting case 20 described later so as not to rotate.
A planetary gear 15 having the same number of teeth as the sun gear 12 is rotatably fitted on the both drive shafts 14.

An intermediate shaft 16 is axially supported in the rotating case 11 at an intermediate position between the pawl drive shaft 9 and both drive shafts 14, and the sun gear 12 and the planetary gear 15 are mounted on the intermediate shafts 16.
And an intermediate gear 17 meshing with both of them are fitted to form a gear train mechanism (in this case, the planetary gear 15 may directly mesh with the sun gear 12). On the other hand, a hollow planting shaft 18 is rotatably fitted on both drive shafts 14 in the rotary case 11, and one end of the planting shaft 18 and the drive shaft 14 are projected to the outside of the rotary case 11. A hollow seedling planting case 20 having seedling dividing claws 19 at the tips thereof is fixed to the projecting ends of the two planting shafts 18 such that the dividing claws 19 are oriented toward the seedling placing table 3. .

The planet gears 15 on both drive shafts 14 are provided with claws 21 projecting toward the planting shaft 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 pawls 21 and 22 to urge the pawls 21 and 22 in a direction in which the pawls 21 and 22 come into contact with each other, and the ring-shaped spring body 23 is used to plant the left rotation of the planetary gear 15. It is configured to elastically transmit to the shaft 18.

On the other hand, each of the seedling planting cases 20 is provided with a hollow guide shaft 27 extending in parallel with the split claws 19 so that the hollow guide shaft 27 can move up and down.
The push-out tool 28 is provided therein with springs 29 for biasing the guide shaft 27 downward. That is, the spring 29 is provided at a portion where the axis of the spring 29 is substantially aligned with the axis of the pushing tool 28 in the operating direction.

A rocking lever 30 is provided in each seedling planting case 20, and a base end of the rocking lever 30 is rotatably pinned at a position opposite to the guide shaft 27 with the drive shaft 14 interposed therebetween. While pivotally attached at 31, the other end 32 of the rocking lever 30 is rotatably and non-slidably engaged with the upper end of the guide shaft 27, and the rocking lever 30 is vertically rotated. The pushing tool 28 is configured to move up and down, and further, the drive shaft 14 is inserted into the seedling planting case 20, and a cam 33 is fixed to the drive shaft 14 in the seedling planting case 20. When the rocking lever 30 is brought into contact with the outer peripheral surface of the, and the outer peripheral surface of the cam 33 comes close to the lower limit of descending as the seedling planting cases 20 rotate with the rotation case 11, The swing lever 30 is rotated downward by the pressing force of the spring 29. However, when each seedling planting case 20 rises away from the field scene B as the rotating case 11 rotates, the swing lever 30 rotates upward against the spring 29. To do.

Further, fan-shaped cams 24 are fixed to both the intermediate shafts 16 in the rotary case 11, while both sleeve-shaped planting shafts 18 in the rotary case 11 are
Stopper arms 25 are integrally provided, and the seedling planting case 20 corresponds to the lower end of the seedling placing table 3 on the side facing the seedling placing table 3 as the rotating case 11 rotates in the direction of arrow A. From the height position (that is, the position where the rotating case 11 is substantially horizontal) to a position slightly before the lower limit of descent (that is,
(Position where the split claw 19 entered the field scene B to a predetermined depth)
The stopper arm 25 of the sleeve-shaped planting shaft 18 comes into contact with the arcuate outer peripheral surface 26 of the cam 24 on the intermediate shaft 16 only in the section descending to the left side of the planting shaft 18 only in the section. To be delayed.

In this structure, when the rotating case 11 of the seedling planting device 10 revolves in the direction of arrow A by the pawl drive shaft 9, the seedling planting case is attached to the planting shafts 18 fitted to the drive shafts 14 at both ends thereof. 20 revolves around the pawl drive shaft 9, but the planting shaft 18 to which the seedling planting case 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 sun gear 12 via an intermediate gear 17.
, The sun gear 12 and a sun gear 12 form a gear train mechanism, and the sun gear 12 and the planetary gear 15 have the same number of teeth. Is the same as the revolution angle of the revolution case 11 in the direction of the arrow A.
Since the drive shaft 14 rotates about the drive shaft 14 in the direction opposite to the direction, both seedling planting cases 20 turn in the direction of arrow A in the state of facing the seedling mounting table 3, and this turning movement is performed. Inside, when descending from the upper side to the lower side on the side facing the seedling placing table 3, after splitting only one seedling from the seedling mat on the seedling placing table 3 by the dividing claw 19 at the tip, near the lower limit of the descending At the tip of the split claw 19 enters the field scene B,
After that, it rises from 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 on the side facing the seedling placing table 3 has the shape shown in FIG.
As shown in FIG. 5, the seedling planting case 20 is brought into contact with the arc-shaped outer peripheral surface 26 of the cam 24 on the intermediate shaft 16 and the rotation of the seedling planting case 20 in the direction opposite to the arrow A is stopped from this point. Rotation in the direction opposite to the arrow A in
Is delayed with respect to the revolution in the direction of arrow A (however, the planetary gear 15 rotates in the direction opposite to the direction of arrow A, separates the pawls 21 and 22 against the spring body 23, and is elastic to the spring body 23). Force is stored), and the posture of the seedling planting case 20 is changed so that the split claws 19 thereof are substantially vertical to the field scene B as the rotating case 11 revolves in the direction of arrow A. Break into B.

When the stopper arm 25 disengages from the arcuate outer peripheral surface 26 of the cam 24 as the rotating case 11 revolves in the direction of arrow A, the seedling planting case 20 moves in the direction opposite to arrow A by the elastic force of the spring body 23. Is rotated back around the planting shaft 14, and this return rotation causes the split claw 19
After planting the seedlings in the field scene B, it moves out of the field scene B while moving in a direction opposite to the traveling direction of the rice transplanter 1, that is, moving away from the seedlings after planting, and eventually the seedling planting case 2
Since 0 returns to the original posture, the motion locus of the tip of the split claw 19 at this time becomes an elliptical closed loop curve D which is long in the vertical direction, as shown by the chain double-dashed line in FIG. As a result, an elliptical closed loop curve having the same shape as that of the crank type seedling planting device described in Japanese Patent Publication No. 49-27762 is obtained.

That is, both seedling planting cases 20 here
When the divided claw 19 with the seedling descends toward the field scene B, the posture is vertically changed to enter the field scene B,
When leaving the field scene B after planting, it rises while escaping away from the seedling after planting, so that it is possible to reliably plant the seedlings in the field scene B under the correct posture.

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 rotates.
When the seedling planting case 20 reaches the lower limit of lowering at which the tip of the split claw 19 of the seedling planting case 20 penetrates into the field B, the urging lever 30 that contacts the cam 33 on the drive shaft 14 in FIG. As a result of this rotation, the pusher 28 at the lower end of the guide shaft 27 is rotated in the downward direction based on the shape of the cam 33. As shown by the chain double-dashed line in FIG.
The seedlings are planted so as to be pushed into the farm scene B by pushing forward toward the tip of the plant, and when the pushing and planting is finished, the push-out tool 28 is almost at the same time when the split claw 19 comes out of the farm scene B. Based on the shape of the cam 33, it moves backward from the tip of the split claw 19 against the spring 29 and returns to the original position (the position shown by the solid line in FIG. 8).

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, the rotation of the seedling planting case 20 by the planetary gears 15 is prevented.
By delaying the revolution of the planting axis 18
Although the case of transmitting the non-uniform speed rotation is shown in FIG. 10, instead of this method, as shown in FIGS. 10 and 11, on the intermediate shaft 16, an arc-shaped outer peripheral surface 26a and a toothless portion are formed in a part of the circumference. While fixing the cam gear 24a having the portion 26b, the planting shaft 18
A toothless stopper gear 25a is provided on the upper side of which a part of the teeth of the circumference is cut out, so that the same operation as described above is performed, that is, the planting shaft 18 is rotated by the rotation of the rotating case 11. The present invention may be configured to transmit unequal rotation, and the present invention is not limited to one rotating case 11 to which two seedling planting cases 20 are attached, and three or more seedling planting cases may be provided. Of course, it can also be applied to the case of mounting.

[0021]

INDUSTRIAL APPLICABILITY As described above, according to the present invention, in the rotary type seedling planting apparatus having a high seedling planting speed in the field, the split claws in each seedling planting case can be pivoted to the seedling planting case. By providing an operating push-out tool, the push-out tool can prevent the seedlings once planted in the field from being lifted up with the split claws having a high peripheral speed. Can be greatly improved.

By the way, in Japanese Patent Publication No. 49-17807, which is the prior art of the present invention, the split claws in each seedling planting case are made into a pair of left and right split claws, and both split claws are
It is configured to open and close laterally to release the planted seedlings,
The planting speed of the seedlings in the rotary type seedling plant is much faster than that in the crank type seedling planter. Therefore, it is not possible to separate the seedlings by simply opening both split claws. There is a risk of lifting together with the attached.

On the other hand, according to the present invention, since the seedlings divided by the split claws are pushed toward the tip of the split claws by the pushing tool, the seedlings can be reliably released, and the pushing tool is also provided. The operation of the push-out tool is performed by swinging the head so that the movement locus of the tip of the split claw in each seedling planting case draws a long elliptical closed loop locus in the vertical direction. Has an effect that can be achieved by a simple and highly durable configuration.

[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 sectional view of a seedling planting device according to an embodiment of the present invention.

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

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 planting case.

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 seedling planting device of the present invention.

FIG. 11 is a diagram showing the operating state of FIG. 10;

[Explanation of symbols]

 1 Rice transplanter 9 Claw drive 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 24 Cam 25 Stopper arm 24a Cam gear 25a Stopper gear 27 Guide shaft 28 Push-out tool 29 Spring 30 Swing lever 33 Cam

Claims (1)

[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, each of which is axially supported in parallel with the axis, a seedling planting case provided with a split claw on each planting shaft, with the split claws facing toward the seedling platform side. While each is mounted, a mechanism is provided in the rotating case for transmitting non-constant speed rotation to each of the planting shafts as the rotating case rotates. In a seedling planting device configured to pivot and rotate so that the tip of the split claw in the case draws a locus of an elliptical closed loop that is long in the vertical direction, in each of the seedling planting cases,
An extruding tool for extruding the seedlings divided by the split claws in the seedling planting case toward the tip of the split claws is provided, and the pusher is non-rotatable in the seedling planting case with respect to the rotating case. A seedling planting device in a rice transplanter, wherein a cam provided so as to be fixed is configured such that the push-out tool is moved forward and then backward with the swinging rotation of the seedling planting case.