JP2653366B2 - Transplant device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transplanting apparatus for transplanting rice seedlings and vegetable seedlings.

[0002]

2. Description of the Related Art Conventionally, there has been a transplantation device disclosed in Japanese Utility Model Laid-Open No. 61-110219. In this conventional transplanting device, a transplanting tool is mounted on the tip side of the rotating case, and a seedling transplanting claw of the transplanting tool takes out a seedling from the seedling supply table located in the traveling direction side with the rotation of the rotating case. In the form of transplantation on the soil surface, the transmission of the transplantation tool mounting shaft of the transplantation tool in this rotating case is mounted in a state where the sun gear whose pitch circle is a perfect circle is eccentric to the rotation shaft of the rotating case, It is performed from the sun gear via the same eccentric planet gear as the eccentric counter gear of the same pitch circle, and the distance between the rotation axis of the rotating case and the distance from the rotation axis to the pitch circle of the sun gear is the farthest point and the closest point. Were aligned in a straight line.

[0003]

In the conventional transplanting device, the rotation axis of the rotating case and the point where the distance from the rotation axis to the pitch circle of the sun gear is the longest and the closest are aligned. In such a state, the perfect sun gear is eccentrically provided on the rotation axis of the rotating case. . Therefore, there is a natural limit in trying to obtain a better seedling trajectory by changing the mounting angle and the amount of eccentricity of the perfect circular sun gear, and an ideal seedling trajectory cannot be obtained. There is a problem that the seedlings fall down after transplanting due to the later planting hole or the seedlings float on the water surface in paddy field transplantation.

[0004]

According to the present invention, in order to solve the conventional problems, the seedling transplanting claw 32 of the transplanting tool 30 mounted on the tip side of the rotating case 21 is rotated by the rotation of the rotating case 21. In the transplanting device 16 for removing the seedlings from the seedling supply device 15 and transplanting them to the field, a transmission mechanism of the transplanting tool 30 to the transplanting tool mounting shaft 29 in the rotating case 21 is provided at the rotation axis of the rotating case 21. A sun gear 25, a planetary gear 28 that operates integrally with the implant mounting shaft 29, and a counter gear 26 interposed between the sun gear 25 and the planetary gear 28, and the rotation of the rotating case 21. Each of the gears 25, 26, and 28 has a non-circular shape as a configuration in which the point B and the point C, which are the farthest point from the axis A to the pitch circle of the sun gear 25 from the rotation axis A, are not on a straight line. Composed of gears It is obtained by a planted device.

[0005]

According to the present invention, the transmission mechanism of the implant 30 to the implant mounting shaft 29 in the rotating case 21 is replaced by a sun gear 25 provided at the rotating shaft center of the rotating case 21.
And a planetary gear 28 that operates integrally with the implant mounting shaft 29
And a counter gear 26 interposed between the sun gear 25 and the planetary gear 28, and a rotation axis A of the rotating case 21 and a distance from the rotation axis A to the pitch circle of the sun gear 25. Since the farthest point b and the closest point c are not on a straight line, each of the gears 25, 26, and 28 is constituted by a non-circular gear.
And the operating speed of the seedling transplant nail 32 can be optimally set for planting of seedlings.
Of the seedlings after transplanting can be made very small, and the occurrence of falling seedlings after transplanting and the occurrence of floating seedlings when transplanting paddy fields can be reduced.

[0006]

An embodiment of the present invention will be described in detail with reference to the drawings. Reference numeral 1 denotes a passenger towing vehicle, which is provided with a steering seat 5 at an upper portion of a vehicle body 1a equipped with a pair of left and right driving front wheels 3 and a pair of left and right driving rear wheels 4 steered by a steering handle 2. Reference numeral 6 denotes an engine, 7 denotes a transmission case, 8 denotes a PTO shaft, and 9 denotes a step.

Reference numeral 10 denotes a column, which stands upright from the rear end of the vehicle body 1a, and supports the seat 5 and the step 9. 11
Is a transplanter, which is composed of a transmission case 12 also serving as a machine frame, a seedling receiving frame 13 forming a seedling division opening 13a attached to the transmission case 12 side, a seedling receiving table 14 reciprocally moving laterally left and right, and the like. A seedling supply device 15, a transplanting device 16 for dividing the seedlings in the seedling holding table 14 by one stock and taking out and transplanting them to the lower soil surface, and a leveling float 17.1.
8 mag.

Numeral 19 denotes an elevating link mechanism, in which the bases of the upper and lower links are pivotally connected to the columns 10, and the rear portions of the upper and lower links are pivotally connected by vertical links. Are rotatably mounted via a shaft in the front-rear direction. Reference numeral 20 denotes a hydraulic device, and the cylinder side is the body 1
a, and the transplanter 11 can be moved up and down by attaching the piston side to the upper link.

The transplanting device 16 will be described in detail. Reference numeral 21 denotes a rotating case, which is fitted to a rotating shaft 22 which protrudes to the rear end side of the transmission case 12 and is rotated by transmission, and is fitted and fixed. ing. Reference numeral 23 denotes a bearing medal, which is attached to a side surface of the transmission case 12 so as to support the rotating shaft 22 via a bearing 24, and has a locking claw 23a formed on an end surface on the front end side.

Reference numeral 25 denotes a sun gear, which is fitted and inserted into the rotating shaft 22, and has a bearing metal 23
A locking claw 25 ′ is provided on the end face of the second member so as to engage with the formed locking claw 23 a so as not to rotate with respect to the metal 23. The sun gear 25 is connected to the rotating shaft 22.
The gears are manufactured so that the pitch radii are different on the radiation having an angle obtained by dividing the circumference by the number of teeth with the axis A as a base point. In other words, the conventional eccentric gear has a constant pitch radius and the center of its axis is shifted, whereas the sun gear 25 is a non-circular gear in which the center of the pitch circle is not fixed at one point. It is.

As shown in FIG. 5, the sun gear 25 is arranged such that the point B, which is the farthest from the axis A to the pitch circle, and the point C, which are the closest, are on a straight line passing through the axis A. Not
It is formed into an asymmetric gear. As described above, the state of being inserted into the rotary shaft 22 and being locked to the bearing metal 23 is a coordinate formed by a horizontal line X and a vertical line Y centered on the axis A of the rotary shaft 22. In the fourth quadrant, the point B, which is the farthest from the axis A to the pitch circle, is located on a line approximately 45 degrees from the horizontal line X in the fourth quadrant. The point c where the distance from the axis A to the pitch circle is the closest is located at a position closer to the horizontal line X in the second quadrant. For this reason, in the pitch circle of the gear located from the third quadrant to the substantially middle part of the fourth quadrant, the variation in the distance from the axis A is larger than the variation in the first quadrant.

Reference numeral 26 denotes a counter gear, which is rotatably provided on the rotary case 21 via a shaft 27 and meshes with the sun gear 25. Reference numeral 28 denotes a planetary gear, which is provided on a gear having the same pitch circle as that of the sun gear 25, and is rotatably supported by the rotating case 21 and integrated with a transplant tool mounting shaft 29 protruding outside the rotating case 21. And meshes with the counter gear 26. The rotational speed of the rotating case 21 and the rotational speed of the implant mounting shaft 29 are opposite but the same, and the angular velocity fluctuates during one rotation of the implant mounting shaft 29. . Note that the axes of the gears are the same.

Numeral 30 denotes a transplantation tool, a pair of bases connected in a U-shape to the outside of the distal end of a transplant case 31 having a hollow interior formed by a case body 31a, an upper lid 31b, and a mounting metal 31c. Is attached so that the tip thereof faces downward.
On the rear side of 2, an extruding claw 34 provided integrally with an elevating shaft 33 protruding from the inside of the transplant case 31 is provided. And
The metal 31c of the implant 30 is fixed to the implant mounting shaft 29 with a cotter pin 35.

The case body 31a and the mounting metal 3
A long hole 38 is formed in the metal shaft so that when the fixing bolts 36 and 37 are loosened, the rotation can be adjusted about the axis of the implant mounting shaft 29. Reference numeral 39 denotes a cam body, which is integrally provided on the distal end side of the long cylindrical shaft 40, forms a base-side outer periphery of the shaft 40 on a square shaft 40a, and protrudes inward from the outer surface of the rotary case 21 to be protruded. Rotating case 21
The cam body 39 is configured to rotate integrally with the rotating case 21 by providing a square hole 21a fitted to the square shaft 40a on the side.

Reference numeral 41 denotes an interlocking rod. The front and rear intermediate portions are rotatably mounted on a shaft 42. The base side is slidably contacted with the cam body 39, and the distal end side is connected to the elevating shaft 33. . Reference numeral 43 denotes a spring which repels the elevating shaft 33. Next, the operation of the above example will be described. The riding type transplanter constructed as in the above example is put into a paddy field, and mat-shaped seedlings are placed and accommodated in the seedling accommodating pedestal 14, and then each part is transmitted by the engine 6.

Then, the towing vehicle 1 is moved to the front and rear wheels 3.3.4.
-The propulsion is performed by the rotation of 4, and the transplanter 11 is towed via the lifting link mechanism 19 while the partial load of the body is received by the leveling floats 17 and 18. The transmission mechanism in the transmission case 12 of the transplanter 11 is transmitted by the PTO shaft 8 from the towing vehicle 1 side, and the rotation case 21 is rotated by the rotation of the rotation shaft 22.

With the rotation of the rotary case 21, the implant mounting shaft 29 is rotated by the sun gear 25, the counter gear 26 meshing with the sun gear 25, and the planetary gear 2 meshing with the counter gear 26.
8, the rotating case 2 is located on the side opposite to the rotating case 21.
It is driven and rotated at the same rotation speed as 1. Since the implant mounting shaft 29 is transmitted by the non-circular gears of the sun gear 25, the counter gear 26, and the planetary gear 28, the angular velocity fluctuates during one rotation, so that the implant mounting shaft 29 is mounted on the implant mounting shaft 29. The transplanting tool 30 swings with respect to the rotating case 21, and the tip of the seedling transplanting nail 32 draws a closed-loop transplantation trajectory P different from a perfect circle. Will be ported to.

This will be described in more detail.
5 is the fifth in which the pitch circle from the axis a of the support shaft becomes maximum.
The implant mounting shaft 29 is rotated at the maximum speed when the tip side of the rotating case 21 is rotated to the middle portion of the fourth quadrant in the figure, and the pitch circle of the sun gear 25 is the axis near the horizontal line in the second quadrant. The rotating case 21 in this direction because it is closest to the center
When the tip side of the is turned, the implant mounting shaft 29 is rotated at the minimum speed.

The seedling transplanting claw 32 of the transplanting tool 30 divides the seedling from the seedling supply device 15 at the inclined portion where the tip of the rotating case 21 is located slightly on the second quadrant side of the vertical upper side, and then moves downward. When the rotating case 21 shown in FIG. 7 is rotated about 40 degrees below the horizontal line, the seedling transplanting claws 32 begin to rush into the soil surface, and then on the vertical line shown in FIG. The seedling is released when facing directly below, and the seedling-transplanting nail 32 escapes from the soil surface in the state of FIG. It is transplanted and returns to the original state of FIG. 6 through the state of FIG.

That is, the angle range during rotation of the rotating case 21 when the seedling transplanting claw 32 is intervening on the soil surface is defined by the horizontal line X about the axis A of the transplanting tool mounting shaft of the sun gear 25. And the vertical line Y, the coordinates are between about 218 degrees and 295 degrees. During this time, the reversal speed of the implant 30 with respect to the rotating case 21 is a portion that changes from a low-speed state to a high-speed state. The seedling-transplanting claw 32 enters the soil most deeply when the tip of 270 degrees on the above-mentioned coordinates at which the tip is closest to the soil surface. The ratio of the rotational speed of the implant 30 to the rotational speed of the rotating case 21 from the point of deepest penetration to the exit of 295 degrees is made larger than the ratio of the rotational speed of the device 30. Therefore, while the seedling-transplanting nail 32 enters the soil while the transplanting device is moving forward, the intervention speed is slow, so that the seedling-transplanting nail 32 is less likely to move forward. During deep entry and exit on the soil surface, it is quickly swung upward and upward, and escapes instantaneously, so that the planting hole after transplanting seedlings becomes extremely small in the front-rear direction.

In order to make this easier to understand, the sun gear 2
5 and a counter gear 2 that is engaged with this and is planetary-rotated
FIG. 11 shows a ratio (angular speed ratio) between a rotational angle shift (angular displacement) and an angular speed (angular speed ratio) during one rotation (0 ° to 360 °) of FIG. In this figure, those indicated by dotted lines are:
This shows the change in the meshing rotation angle of the two gears due to the meshing transmission of the perfect circle sun gear and the perfect circle counter gear.
Appears linearly in degrees. On the other hand, FIGS. 13 to 17 show a combination of eccentric gears having eccentric shafts of perfect circular gears.
The sun gear 25a and the counter gear 2 of the conventional device shown in FIG.
In the meshing with 6a, even if the sun gear 25a is set at the same relational position as the embodiment of the present invention, as shown in FIG. Are located on the straight line connecting the points from the axis A to the pitch circle, and the point C 'is located at the nearest point. Therefore, a 180-degree intersection point as shown by a dashed line appears in a curved line. Then, according to the embodiment of the present invention, according to the meshing of the combination of the non-circular gears, at a point earlier than the intersection of 180 degrees, the line appears as a solid line crossing the dotted line of 45 degrees.

In other words, it can be seen from this solid line that any of the meshing becomes a vertex at approximately 270 degrees with respect to the sun gear side, and the angular speed of the counter gear shifts from the deceleration to the speed increasing side around the vertex. . From this solid line, the ratio of the angular velocities of the two gears 25 and 26 is obtained and plotted as a solid line. From this solid line, the angular velocity of the counter gear is lower than the horizontal line at 180 degrees, and the angular velocity of the transmission of the perfect circular gear is The speed is decelerated more than in the case, and the speed on the upper side is increased. Therefore, when the sun gear 25 is set as a reference, the front position (arrow F
Side), the speed increases in the rear position (arrow R side).
It can be understood that when the position of 0 degree is set so that the seedling transplanting nail 32 of the transplanting tool 30 penetrates deepest in the soil, the planting trace hole is minimized.

FIG. 12 shows a sun gear 25 and a planetary gear 28.
The angular displacement of one rotation (0 ° to 360 °) and the angular speed ratio are expressed in the same manner as in the case of FIG. 11, and the diagram of FIG. Is the same trend, but the trend is doubled. FIGS. 14 to 17 show the state of the transplantation trajectory P 'in the case of the eccentric sun gear 25a shown in FIG. 13 in the same relation as FIGS. 6 to 9 described in the embodiment of the present invention. Comparing this, it is clear that the eccentric sun gear 25a has a considerably larger front-to-rear dimension L of the planting trace hole than the front-to-rear dimension l of the planting trace hole of the present invention. FIG. 6 shows the actual transplantation trajectories P ₁ and P ₁ ′ when 70 strains are transplanted per 3.3 square meters in the transplanted state while the running is stopped. It is clear from FIG. 14 that the planting hole is extremely small in the present invention.

As can be understood from the above description, the setting state in which the sun gear 25 is fixed is such that the pitch circle is farthest from the axis A of the support shaft substantially near the middle portion of the fourth quadrant in the aforementioned coordinates. Where the sun gear 25
The portion closest to the axis A of the pitch circle is lower than the point where the pitch circle intersects with the extension line of the straight line connecting the axis A and the point farthest from the pitch circle. In the rotation direction, the angle between the point near the pitch circle and the point far from the axis a is 180 degrees or less to increase the fluctuation of the pitch circle,
During this time, the seedling-transplanting nails 32 of the transplanting tool 30 were set so as to be at the time of transplantation, so that the planting trace holes formed by the seedling-transplanting nails 32 could be reduced, and the number of lodgings and floating seedlings after transplanting could be reduced.

[Brief description of the drawings]

FIG. 1 is an overall side view of a riding type transplanter.

FIG. 2 is an overall plan view of the riding type transplanter.

FIG. 3 is a partial cross-sectional side view of the implanting device.

FIG. 4 is a cross-sectional plan view of the implantation device.

FIG. 5 is a side view showing a setting state of a sun gear.

FIG. 6 is a simplified side view illustrating an operation state.

FIG. 7 is a simplified side view illustrating an operation state.

FIG. 8 is a simplified side view illustrating an operation state.

FIG. 9 is a simplified side view illustrating an operation state.

FIG. 10 is a simplified side view illustrating an operation state.

FIG. 11 is an explanatory view showing the meshing deviation of a gear by an angular velocity ratio.

FIG. 12 is an explanatory diagram showing the meshing deviation of the gear by an angular speed ratio.

FIG. 13 is a side view showing a setting state of a conventional sun gear.

FIG. 14 is a simplified side view illustrating a conventional use state.

FIG. 15 is a simplified side view illustrating a conventional use state.

FIG. 16 is a simplified side view illustrating a conventional use state.

FIG. 17 is a simplified side view illustrating a conventional use state.

[Explanation of symbols]

15 Seedling supply device 16 Transplanting device 21 Rotating case 25 Sun gear 26 Counter gear 28 Planetary gear 29 Transplanting tool mounting shaft 30 Transplanting tool 32 Seedling transplanting claw A Rotation axis of rotation case 21 B Pitch of sun gear 25 from rotation axis a The point where the distance to the circle is the farthest c The point where the distance from the rotation axis a to the pitch circle of the sun gear 25 is the closest

Claims (1)

(57) [Claims] 1. A transplanting device 16 for removing seedlings from a seedling supply device 15 with a rotation of a rotating case 21 and transplanting the seedlings to a field, with a seedling transplanting claw 32 of a transplanting tool 30 attached to the tip side of the rotating case 21. The transmission mechanism of the implant 30 to the implant mounting shaft 29 in the rotating case 21 is constituted by a sun gear 25 provided on the rotation axis of the rotating case 21 and a planetary gear which operates integrally with the implant mounting shaft 29. A gear 28 and a counter gear 26 interposed between the sun gear 25 and the planetary gear 28, and the rotation axis A of the rotating case 21 and the pitch circle of the sun gear 25 from the rotation axis A Wherein the farthest point b and the closest point c are not on a straight line, and each of the gears 25, 26, 28 is constituted by a non-circular gear.