JPS6066908A - Seedling planting device in rice planter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seedling planting device for dividing seedlings one by one from a seedling cloak on a seedling stand and then planting the seedlings in a field in a rice transplanter.

Conventionally, this type of seedling planting device was developed by, for example, the Japanese Patent Publication No. 49-2776.
As described in Publication No. 2, the proximal 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 fixed to a nail shaft that is rotationally driven by the spindle is pivoted, and the rotation of the crank causes the seedling plant to be vertically swung along a closed loop trajectory by the dividing nails at the tip.

However, compared to the previous rotary set described in, for example, Japanese Utility Model Publication No. 33-18922, this conventional vertically swinging type seedling planting device makes the closed loop movement locus of the split claws longer and narrower in the vertical direction. Because you can
Seedling man 1- does not damage the seedlings when dividing them, and after the seedlings are planted in the field, the splitting claws quickly escape from the seedlings, making the planting posture of the seedlings stable. Vibration is generated due to the movement, and this vibration increases in proportion to the speed of vertical movement, and this vibration occurs once per - times of vertical movement, that is, per one rotation of the claw shaft. Since only seedlings can be planted, the speed of planting cannot be increased.

In the present invention, the seedling planting device is a rotary set having a plurality of seedling planting bodies per rotation of the claw shaft, and the dividing claw of each seedling planting body is connected to a planetary gear between the seedling planting body and the claw shaft. The mechanism creates a closed-loop movement trajectory i/, i (in this way, the planting &
While increasing J speed without increasing vibration,
The amount of seedlings taken out by each seedling plant attached to one rotating case can be adjusted, and the amount of seedlings taken out can be adjusted equally for each seedling plant even if the size of each seedling plant varies. It is something.

Below, the present invention will be explained with reference to drawings of an embodiment in which the present invention is applied to a walk-behind two-row rice transplanter. A rice transplanter is shown in which a float 6 that slides on a field scene B is provided on the lower surface of the machine body 5 that also serves as a transmission case, and wheels 7 are attached to both left and right sides of the machine body 5 via swing cases 8. A claw shaft 9 rotatably driven by the power from the engine 2 is pivotally supported in the body 5 in a substantially horizontal direction at a position in front of the seedling stand 3. A rotary set of seedling planting device 10, which will be described later, is attached.

This rotary set of seedling planting device 1'0 is shown in Figures 3 to ff1.
51ffl, the machine body 5 is provided with an oval-shaped rotating case 11 that is fitted and fixed to the end of the claw shaft 9 of the pivot support, and the rotating case 11 is connected to the 1u11 surface of the rice transplanter 1 by 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 I2 rotates to the right in the direction of the arrow in the rotating case 11. It is locked non-rotatably by means 13.

At both left and right ends of the rotating case 11, M Hoshiyama axles 14 are supported parallel to the claw shaft 9 at equal distances from the claw shaft 9. A planetary gear 15 having the same number of teeth as the sun gear 12 is rotatably fitted onto both planetary gear shafts 14 . In addition, an intermediate shaft 1 is located at an intermediate position between the pawl shaft 9 and both planetary gear shafts 14 in the mll sub-rotation case 11.
6 is pivotally supported, and an intermediate gear 17 that meshes with both the sun gear 12 and the planetary gears 15 is fitted onto the intermediate shaft 16 to constitute a planetary gear mechanism.

On the other hand, both planetary gear shafts 14 in the rotating case 11
A sleeve-shaped seedling plant shaft 18 is rotatably fitted onto the top, and the -1 end of the sleeve-shaped seedling plant shaft 18 is attached to the case 11.
It protrudes outward, and the protruding end has a seedling dividing claw 19 at the tip.
The seedling plants 2o equipped with the above-mentioned seedling plants 2o are each rotatably mounted in a position where the dividing claws 19 face the seedling platform 3, and the sleeve-shaped seedling plant shaft 18 and the seedling plants 20 are described in detail later. They are connected via a phase adjustment means 27.

The planetary gears 15 on both planetary gear shafts 14 have two claws that protrude toward the sleeve-shaped seedling planting shaft 18, and the sleeve-like seedling planting shaft 1B has two claws that project toward the planetary gear 15. Both pawls 21 and 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. A ring-shaped spring body 23 is provided between the claws 21 and 22 to urge the claws 21 and 22 into contact with each other. It is configured to elastically transmit the rain to the plant shaft 18, and the rain intermediate shaft 16 in the rotary unit 11
A fan-shaped cam 24 is fixed to each of the sleeves, and a stopper arm 25 is integrally provided to both sleeve-shaped seedling plant shafts 18 that fall inside the rotating case 11, so that the seedling plant 20 can be rotated. As the case 11 rotates in the direction indicated by the arrow, on the side facing the seedling platform 3, from a height position corresponding to the lower end of the seedling platform 3 (a position where the U-turn case 11 is approximately horizontal) A position slightly before the lower limit (in other words, the dividing claw 19
The stopper arm 25 that falls on the sleeve-shaped seedling plant shaft 18 moves down to the arc-shaped outer circumferential surface that falls on the cam 24 of the intermediate shaft 16-A only in the section where the seedling plant descends to the position where the seedling plant enters the field area B to a predetermined depth. 26, so that the left rotation of the sleeve-shaped seedling plant shaft 18 is delayed only in the above-mentioned section.

Furthermore, the phase adjustment means 27, as shown in FIG.
A threaded shaft 30 with 29 as shown in FIG. 32 to adjust the phase of the seedling plant 20 relative to the sleeve-shaped seedling plant shaft 18 by rotating the container shaft 30.

In this configuration, the rotating case 1 in the seedling planting W10
When the shaft 1 revolves in the direction indicated by the arrow by the claw shaft 9, the sleeve-shaped seedling plant shaft 1 is fitted into the planetary gear shaft 14 at both ends thereof.
The seedling plant 20 attached to 8 revolves around the claw axis 9,
The sleeve-shaped seedling plant shaft 18, which the seedling plant 20 pulls, is elastically connected to the planetary float I5 via a spring body 23, and the planetary float 15 meshes with the sun float 12 via an intermediate gear 17. An idle gear mechanism is formed between the sun gear 12 and the sun gear 12.
In addition, the sun float 12 and the planetary float 15 are configured to have the same number of teeth, and the planetary float 15 and the sleeve-shaped seedling planting shaft 18 connected thereto, as well as the seedling planting body 20, are rotated in the direction of arrow A of the rotating case 11. As it revolves around the IWW Yamaichi axis 14, it rotates around the IWW Yamaichi axis 14 at the same rotation angle as the rotation angle or in the direction of arrow C, which is opposite to the direction of arrow entry. While facing the direction of the seedling platform 3 and maintaining a constant posture with respect to the seedling platform 3, the seedling platform rotates in the direction of the arrow. When descending from top to bottom on the side facing 3, divide one seedling from the seedling mat on the seedling stand 3 using the dividing claw I9 at the tip, and then plant it in the field area B near the lower limit of descent. After that, it rises from the field scene B.

In this case, when the rotating case 11 is in a substantially horizontal state,
In the seedling plant 20 on the side facing the seedling platform 3, the stopper arm 25 of the sleeve-shaped seedling plant shaft 18 is connected to the arc-shaped outer circumferential surface 2 of the cam 24 on the intermediate shaft 16, as shown in FIG.
6, and the rotation of the seedling plant 20 in the direction of the arrow C is stopped from this point, so that the rotation of the seedling plant 20 in the direction of the arrow C is changed from the revolution of the rotating case 11 in the direction of the arrow. (However, the planetary gear 15 rotates in the direction of arrow C, the claws 21 and 22 separate against the spring body 23, and elastic force is stored in the spring body 23.) 20, as the rotating case II revolves in the direction of the arrow A, the dividing claw 19 is approximately 20 degrees with respect to the field scene B! r+: The posture is changed so that it becomes straight and it enters the field scene B.

When the stopper arm 25 comes off the arcuate outer peripheral surface 26 of the cam 24 as the one-rotation case 11 revolves in the direction of the arrow A, the seedling plant 20 is moved toward the planetary gear shaft in the direction of the arrow C by the elastic force of the spring body 23. 14 as the center, and by this return rotation, the dividing claws 19 are used to plant the seedlings in the field scene B in the opposite direction to the direction of movement of the rice planting ram l, that is, from the seedlings after planting. As it moves away from the field scene B and rises, the seedling plant 20 eventually returns to its original position, so the movement trajectory of the tip of the split claw 19 at this time is as shown by the two-dot chain line in FIG. A closed loop curve having the same shape as that of the two-bottom swing type seedling planting device disclosed in Japanese Patent Publication No. Sho 49-27762 is obtained.

In other words, the two picture plants 20 shown here are divided by the split claw 1.
When the seedling 9 descends toward the field scene B while holding the seedling, it changes its posture vertically and enters the field scene B4, and when it pulls out from the field scene B after planting, the seedling after planting This allows the seedlings to be planted in the field scene B to be reliably planted in the correct posture.

Since a phase adjusting means 27 is provided between each of the seedling plants 20 and the sleeve-shaped seedling plant shaft 18, the phase adjusting means 27 controls the seedling plants 2o. The phase with respect to the sleeve-shaped seedling plant axis 18 is
If it is displaced to the right as shown by the arrow E in the figure, the seedling plant 2° with the split claw 19 will be displaced downward as shown by the dotted line in Figure 7, and the movement trajectory of its tip will be the same as before the displacement. D Gara Da
The amount of seedlings taken out increases, and the seedling plant 2
If the phase with respect to the sleeve-shaped seedling plant axis 18 is displaced to the left as shown by the arrow F in FIG.
The attached seedling plant 2o is displaced upward as shown by the dashed line in FIG.
As a result, the seedling emergence m is reduced, and the amount of seedlings taken out can be freely adjusted for each seedling plant 20.

Nut t3, in the above embodiment, the cam 24 of the intermediate shaft 16 and the
J-futL [plant axis] 8] Soba arm 25
In this case, the rotation of the seedling plant 2o by the planetary gear 15 was delayed with respect to the revolution of the rotation case 11, but instead of this method, as shown in FIGS. 8 and 9, an intermediate shaft A cam gear 24a having an arcuate outer circumferential surface 26a and a notch 2 (ib) is fixed to a part of the circumference on the sleeve-shaped seedling planting shaft 18, while a cam gear 24a having a part of the circumference It is also possible to provide a toothed stopper gear 2.5a with a notch in the center and perform the same action as described above.According to this embodiment, the rotation of the rotating case 1 is Since it is possible to prevent the separated seedling plant 20 from returning to its original state by the meshing rotation of the gear wheel 24a and the straddle wheel 25a, the planetary gear I5 and the seedling plant 20 are elastically connected. There is an advantage that the spring body 23 can be made smaller.Furthermore, the present invention is not limited to the case where two seedling plants 20 are attached to one rotary case 11, but also when the seedling plants 20 on three sides are attached. Of course, it is also applicable, and as the phase adjustment means,
A configuration other than that shown in the drawings may be used, and the planetary gear and the seedling plant may be connected by a connecting means using an elastic body such as rubber.

As described above, the present invention provides a rotary case that is rotatably driven by power transmission from a power source in the vicinity of the seedling stand, with its axis substantially horizontal (1 piece, there is no space inside the rotary case). , a sun gear configured to be non-rotatable with respect to the machine body and rotatable with respect to the rotation case is provided at the rotation center position, while a sun gear of the seedling stand is provided on the rotation case at an equal position from the rotation center. A plurality of seedling plants each having dividing claws extending in the direction are rotatably provided around an axis parallel to the axis of the rotating case, and inside the rotating case, a plurality of seedling plants each having a splitting claw extending in the direction are provided with an intermediate portion between the sun gear and the seedling plant at a position of each seedling plant. Planetary gears that mesh through gears are provided, each of the planetary gears is configured to have the same number of teeth as the sun gear, and each of the M star gears and the seedling plant are connected by an elastic connection means. In addition, between the intermediate gear and the seedling plant, when each seedling plant descends toward the field with the rotation of the rotating case, the rotation of the seedling plant by the planetary gear is controlled at a constant rate. In each section, a means to delay the time is provided,
Furthermore, a seedling transplanting device for a rice transplanter is characterized in that a means for adjusting the phase of the seedling body with respect to the seedling body axis is provided between the seedling body axis and the seedling body, The same operation υj as in the case of a conventional vertically swinging seedling planting device is applied to each seedling planting body that is attached to a rotating case.

Since the rice planting can be carried out at high speed, the efficiency of rice planting work can be significantly improved, so that the vibrations caused by multiple seedlings planted in one seedling row can be increased. Furthermore, the present invention has the disadvantage that when a plurality of seedling plants are attached to a rotary case, the amount of product taken out of each seedling plant is reduced due to manufacturing dimensional errors of each seedling plant. Set each seedling plant to produce a rose (=J).
) can be corrected by the phase adjustment means, and has the effect of freely increasing or decreasing the amount of seedlings to be taken out.

[Brief explanation of drawings]

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 an IV of FIG. 3. - IV 1v1 side view, FIG. 5 is a V-V sectional view of FIG. 3, FIG. 6 is a diagram showing the operating state of FIG. FIG. 8 is an enlarged sectional view taken along the line ■-■ of FIG. 3, FIG. 9 is a diagram showing another embodiment of the seedling planting device, and FIG. It is a figure showing the action state of J. 1... Rice transplanter, 9... Claw shaft, IO... Seedling transplanting device, ll... Rotating case, 12... Sun gear, 14... Planetary gear shaft, 15...'tf star gear, 16... intermediate shaft, 17... intermediate gear, 18...
... Sleeve-shaped seedling plant shaft, 19 ... Divided claw, 20
... Seedling plant, 21.22 ... Nail, 23 ...
Spring body, 24... cam, 25... stopper arm, 24a... cam gear, 2 J a... stopper gear, 27... phase adjustment means. Patent applicant Yanmar Agricultural Machinery Co., Ltd.

Claims (1)

[Claims] (l) A rotating case that is rotationally driven by power transmission from a power source is attached to the machine body near the seedling stand, with its axis substantially horizontal, and inside the rotating case, the center of rotation is located at the center of rotation. A sun gear configured to be non-rotatable with respect to the machine body and rotatable with respect to the rotary case is provided, and the rotary case is provided with split claws extending in the direction of the seedling stand at equal positions from the center of rotation. A plurality of seedling plants are rotatably mounted on a seedling plant axis supported in a rotating case in parallel with the axis of the seedling plant, and in the rotating case, a sun gear and an intermediate gear are provided at each of the seedling plants. planetary gears that mesh with each other via the sun gear, each planetary gear having the same number of teeth as the sun gear, and each planetary gear and the seedling plant shaft being connected by an elastic connection means. Further, a means is provided between the intermediate gear and the seedling plant axis for delaying the rotation of the seedling plant axis by the Xf star gear by a predetermined period when each seedling plant is moved. A seedling planting device for a rice transplanter, characterized in that a means for adjusting the phase of the seedling plant with respect to the seedling plant axis is provided between the seedling plant axis and the seedling plant body.