JP2003235317A - Transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the trouble of the dragging of a seedling with a planting finger in the case of expanding the hill space in a transplanter provided with a rotary case. <P>SOLUTION: Seedlings are raked from a seedling table 15 and planted on soil with planting fingers 29 attached to both ends of a rotary case 24 by the rotation of the rotary case 24. The transplanter having the above structure is provided with a variable speed changing mechanism 36 to vary the rotational speed of the rotary case 24 and the maximum speed point E of the rotary case 24 is adjusted to the time immediately after the planting of the seedling with the planting finger 29. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of transplanters such as rice transplanters that rotate a rotating case at a non-uniform speed.

[0002]

2. Description of the Related Art In recent years, rotary transplanting mechanisms have become popular in transplanters such as rice transplanters. The rotary planting mechanism
Both ends of the rotating case are equipped with planting claws for scraping off the seedlings from the seedling table as the rotating case rotates and for planting the scraped seedlings in the soil. The rotation speed of the rotating case is linked to the vehicle speed so that the planted stock is constant regardless of the change in the vehicle speed, and the planted stock is adjusted by changing the relative speed with respect to the vehicle speed.

[0003]

By the way, in recent years, there have been attempts to expand the number of planted plants in consideration of the growth conditions (sunlight, aeration, etc.) of the planted seedlings. However, since the stationary locus of the planting claw (movement locus when the aircraft is stopped) is set with reference to the standard planting stock interval, the rotation speed (relative speed) of the rotating case is widened to expand the planting stock interval. If the setting is delayed, the forward movement amount of the planting claw with the progress of the aircraft becomes large in the soil, and the planted seedling may be dragged.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances in order to solve these problems, and it is provided at both ends of a rotating case for rotating the rotating case. A transplanter having a planting claw for scraping off the seedling from the seedling mounting table and planting the scraped seedling in the soil, which causes a speed fluctuation in the rotation of the rotating case. An unequal speed conversion mechanism is provided, and the highest speed point of rotation of the rotating case is adjusted immediately after the planting claws plant seedlings. In other words, since the operation speed of the planting nail in the soil can be increased without changing the planting cycle, even if the planting stock is widened, the forward movement amount of the planting nail in the soil is suppressed and the seedling Can be prevented from being dragged. Moreover, since the highest speed point of the rotating case is immediately after planting the seedlings (in the soil), it is possible to pull up the planting claws more quickly than when the bottom dead center is set as the highest speed point. Interference with planted seedlings can be reduced and planting accuracy can be further improved. Further, in the rotation area of the rotating case, a maximum speed point is provided by shifting from the maximum speed point immediately after the planting by approximately 180 ° to increase the speed of the rotating case when the planting claw scrapes the seedlings. It is characterized by that.
In this case, the planting precision cannot be improved by increasing the speed immediately after planting, and the scraping performance of the planted seedlings can also be improved by increasing the speed during seedling scraping.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Next, one of the embodiments of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 is a traveling machine body of a passenger rice transplanter, and the traveling machine body 1 includes an engine (not shown) mounted on a front portion of the machine body, a mission case 2 for inputting engine power, and a front axle case 3 A pair of left and right front wheels 4 mounted via the rear axle case 5 and a pair of left and right rear wheels 6 mounted via the rear axle case 5 are provided. Engine power is input to the mission case 2 via the belt type continuously variable transmission mechanism 7. The engine power input to the mission case 2 is the main clutch mechanism 8
The power is transmitted from the lower side to the front axle case 3 and the rear axle case 5, and is also transmitted to the planted PTO shaft 10 via the stock change gear mechanism 9. The inter-stock transmission mechanism 9 includes a first speed change operation unit 11 provided with two speed change gears 11a and 11b, and three speed change gears 12a and 12b.
And a second shift operation unit 12 provided with 12c. The rotation speed (relative speed to the vehicle speed) of the planted PTO shaft 10 is changed in six stages according to the shift operation of each shift operation unit 11, 12. It

A lift link mechanism 1 is provided at the rear of the traveling body 1.
The planting work unit 13 is connected via a. The planting work unit 13 includes a planting frame 14 that is connected to the elevating link mechanism 1a in a rolling manner, a seedling mounting table 15 that is provided above the planting frame 14 so as to reciprocate left and right, and the planting frame 14 described above. Input case 1 attached to the left and right middle part of
6, a plurality of planted transmission cases 17 that are attached to the planted frame 14 at predetermined intervals in the left-right direction and extend rearward from the planted frame 14, and the rear of the planted transmission case 17. The planting mechanism 18 is provided at the end, and the float 19 is provided below the planting transmission case 17 so as to be vertically swingable.

The input case 16 is the planted PTO shaft 10 described above.
An input shaft 20 for inputting planting power from The planting power input to the input case 16 is transmitted to the front end portion of each planting transmission case 17 via the planting transmission shaft 21, and further,
The planting power transmitted to the planting transmission case 17 is pierced by the rear end portion of the planting transmission case 17 so as to penetrate therethrough.
2 is transmitted via the chain transmission mechanism 23.

At both ends or one end of the planting drive shaft 22, a rotary case 24 constituting the planting mechanism 18 is integrally provided. The rotating case 24 is rotatably supported by the planting drive shaft 22, and is sun-rotated with the sun gear 25 that meshes with the planting transmission case 17 side and is prevented from rotating. A pair of intermediate gears 2 that shift and mesh with each other
6 and a planetary gear 27 that meshes with each intermediate gear 26.

At both ends of the rotating case 24, planting claw support cases 28 are provided. Each planting claw support case 28 is
The tip end is provided with a planting claw 29, while the base end is integrally provided with a cylindrical shaft 30. The tubular shaft 30 is rotatably supported at both ends of the rotating case 24 and is integrally connected to each planet gear 27. That is, when the rotation case 24 rotates along with the drive of the planting drive shaft 22, the intermediate gear 26 rotates while revolving around the sun gear 25, and the planetary gear 27 rotates in the reverse direction. The attached claw support case 28 revolves around the planting drive shaft 22 and rotates about the tubular shaft 30 in the opposite direction.
Therefore, the planting claw support case 28 is kept in a posture facing the front lower side even if the rotating case 24 rotates.

The sun gear 25, the intermediate gear 26 and the planetary gear 27 are all eccentric gears. The angular velocity of the eccentric gear is such that the tip of the planting claw 29 is at the lower end of the seedling mounting table 15. After scraping off the seedlings, it is set to draw a semi-lunar stationary locus (the tip movement locus when the vehicle stops moving), reaching the planting position in the soil while drawing an arc that swells forward, and then rising linearly. To be done. Also, one of the planting claws 29 is the seedling mounting table 1
When scraping the seedlings from No. 5, at the same time, the other planting nail 29
Performs planting, and the other planting claw 29 is used for the seedling mounting table 1
At the same time when scraping the seedlings from 5, one of the planting nails 29
The position and locus of the planting claw 29 are set so that the planting claw performs planting. As a result, it is possible to perform the planting twice each time the rotating case 24 makes one rotation.

In the input case 16, the planting power input by the input shaft 20 is transmitted to the first transmission shaft 32 via the bevel gear mechanism 31. The power of the first transmission shaft 32 is transmitted to the planted transmission shaft 21 via the second transmission shaft 33, and at the same time, transmitted to the transverse feed transmission case 34 via the transverse feed transmission shaft 32a. The lateral feed speed change case 34 is attached to the right end portion of the planting frame 14, and the lateral feed power input from the lateral feed transmission shaft 32a is shifted by the internal lateral feed speed change mechanism 34a, and then the seedling table lateral feed is performed. It is configured to transmit to the shaft 35. The seedling table horizontal feed shaft 35 is a screw shaft having an endless spiral groove, and the seedling table 15 is horizontally fed in a reciprocating manner according to the rotation thereof.

A non-constant speed conversion mechanism 36 is provided between the first transmission shaft 32 and the second transmission shaft 33. The non-constant speed conversion mechanism 36 includes a pair of eccentric gears 36 a, 3 that mesh with each other.
By transmitting power via 6b, the rotating case 2
The rotation speed of 4 causes a periodic speed fluctuation. The interposition of the unequal speed conversion mechanism 36 in the planted power transmission path is
It is on the transmission side of the planting mechanism 18 and on the transmission side of the inter-stock transmission mechanism 9 and the lateral feed transmission case 34. This eliminates the inconvenience that the speed fluctuation position of the rotating case 24 is displaced due to the stock change and the lateral feed speed of the seedling placing table 15 becomes unequal to generate vibration. Moreover,
Since the non-constant speed conversion mechanism 36 is provided on the transmission upper side of the planted transmission shaft 21 that distributes power to each planted drive shaft 22, the rotational speeds of the plurality of rotating cases 24 are not provided at one place. It becomes possible to convert at a constant speed.

The non-constant speed conversion mechanism 36 is arranged outside the input case 16 and is easily removable.
Is covered with. When the cover 37 is removed, the eccentric gear 36a,
36b is exposed and can be replaced. Therefore, when changing working conditions (between planting stocks, etc.), the eccentric gear 36a,
By exchanging 36b for an eccentric gear having a different speed change amount, it becomes possible to perform unequal speed conversion suitable for working conditions.

A reduction mechanism 38 is provided between the second transmission shaft 33 and the planted transmission shaft 21. The reduction ratio of the reduction mechanism 38 is determined by the planting claw support case 28 provided on the rotating case 24.
The number is set to an integral multiple of the number of (planting claws 29) (the number of times planting is performed during one rotation of the rotating case 24). As a result, even when the eccentric gears 36a and 36b generate a single speed-up region during one rotation, it is possible to cause similar speed fluctuations in each planting claw 29. Further, since the reduction mechanism 38 is provided on the transmission upper side of the planted transmission shaft 21 that distributes power to each planted drive shaft 22, it is provided with a plurality of planting mechanisms 18, but the planting claws are provided. It is possible to perform deceleration according to the number of 29 in one place.

Next, setting of the acceleration / deceleration area and setting of the maximum speed point of the rotating case 24 will be described. FIG. 10 is a side view showing the stationary locus of the planting nail. As shown in this figure,
In the present embodiment, in which the number of the planting claws 29 provided in each rotary case 24 is two, the non-constant speed conversion mechanism 36 and the reduction mechanism 38 described above are provided in the planted power transmission path to rotate the planting claws 29. Acceleration regions A and C and deceleration regions B and D are generated in the rotation speed of the case 24. As a result, each planting nail 29
While the scraping movement speed and the soil movement speed are increased,
The movement speed in the intermediate movement range holding the scraped seedlings is reduced. Further, in each speed increasing area A, C, there are two highest speed points E, F which are shifted by about 180 °. On the other hand, the highest speed point E is
While the planting claw 29 is set immediately after planting the seedling (in the soil), the highest speed point F on the other side is also set when the planting claw 29 scrapes the seedling. Hereinafter, the running locus of the planting nail 29 when the distance between the plants is set wide (for example, 24 cm) will be shown, and the operation of the present invention will be described based on the running locus.

FIG. 11 is an explanatory view showing a conventional running locus. As shown in this figure, in the conventional case in which the non-constant speed conversion is not performed, if the plant spacing is set wide (the planting speed with respect to the vehicle speed is slowed), the movement speed of the planting claw 29 in the soil becomes insufficient. From, the planting claw 2 as the aircraft progresses
There is a possibility that the amount of forward movement 9 of the soil 9 becomes large and the planted claw 29 drags the planted seedling.

FIG. 12 is an explanatory diagram showing a running locus when the lowest point is the highest speed point. As shown in this figure, when the lowest point (120 °) of the planting claw 29 is set as the highest speed point, the speed of movement of the planting claw 29 in the soil is increased, so that the aircraft progresses. As a result, the amount of forward movement of the planting claw 29 in the soil decreases. However, the lifting speed of the planting claw 29 after planting the seedlings is not sufficient, and there is a possibility that the planting claws 29 may interfere with the raising of the planting claws 29.

FIG. 13 is an explanatory view showing the running locus of the present invention. As shown in this figure, when the planting claw 29 immediately after planting the seedling (140 °) is the highest speed point,
Since the movement speed of the planting claw 29 in the soil is increased, the amount of forward movement of the planting claw 29 in the soil with the progress of the airframe is reduced. Further, as compared with the one shown in FIG. 12, the raising speed of the planting claw 29 after planting the seedlings becomes faster, and the interference between the planting claws 29 and the planted seedlings is avoided. Moreover, 18
The other highest speed point set by shifting 0 ° coincides with the timing of scraping the seedlings, and the scraping performance can be improved.

In the structure constructed as described above, the seedlings are scraped off the seedling mounting table 15 at both ends of the rotary case 24 as the rotary case 24 rotates, and the scraped seedlings are planted in the soil. In a rice transplanter equipped with a planting claw 29 to be attached, a non-constant speed conversion mechanism 36 that causes speed variation in the rotation of the rotating case 24 is provided, and the highest point E of rotation of the rotating case 24 is set to the planting claw. Since 29 was set immediately after planting the seedlings, the operation speed of the planting claws 29 in the soil can be increased without changing the planting cycle, and as a result, even if the planting stocks are widened, The amount of forward movement of the planting claw 29 is suppressed, and dragging of the seedlings can be prevented. Moreover, since the highest speed point E of the rotating case 24 is immediately after the seedling is planted (in the soil), it is possible to quickly pull up the planting claw 29 as compared with the case where the bottom dead center is set as the highest speed point. As a result, it is possible to reduce the interference with the planted seedlings and further improve the planting accuracy.

In the rotation area of the rotation case 24,
Since the maximum speed point F is provided by being shifted by 180 ° from the maximum speed point E immediately after planting, and the speed of the rotary case 24 when the seedling claw 29 scrapes the seedlings is increased, the maximum speed immediately after planting is achieved. Not only is it possible to improve the planting accuracy by speeding up, but also the speeding up at the time of seedling scraping can improve the scraping performance of the planted seedlings.

[Brief description of drawings]

FIG. 1 is a side view of a riding rice transplanter.

FIG. 2 is a development view showing a transmission structure of traveling power and planting power in the traveling machine body.

FIG. 3 is a development view showing an inter-stock transmission mechanism.

FIG. 4 is a side view of a planting work unit.

FIG. 5 is a development view showing a transmission path of planting power in the traveling machine body and the planting work unit.

FIG. 6 is a development view showing a transmission path of planting power in a planting work unit.

FIG. 7 is a side sectional view of a planting mechanism.

FIG. 8 is a plan sectional view of the same.

9A is a side view of the unequal speed conversion mechanism, FIG. 9B is a graph showing an output rotation angular velocity of the unequal speed conversion mechanism, and FIG. 9C is a graph showing an output rotation angular velocity of the reduction mechanism.

FIG. 10 is a side view showing a stationary locus of the planting nail.

FIG. 11 is an explanatory diagram showing a conventional running locus.

FIG. 12 is an explanatory diagram showing a running locus when the lowest point is the highest speed point.

FIG. 13 is an explanatory diagram showing a running locus of the present invention.

FIG. 14 is an explanatory diagram comparing various running trajectories.

[Explanation of symbols]

1 traveling aircraft 9 Stock change mechanism 13 Planting work department 14 Planted frame 15 seedling stand 16 input cases 17 Transmission case with planting 18 Planting mechanism 21 Transmission shaft with plant 22 Drive shaft with plant 24 rotating case 28 Planted claw support case 29 Planted nails 34 Lateral feed shift case 36 Non-uniform speed conversion mechanism 38 Reduction mechanism A, C speed increasing range B, D deceleration area E, F highest speed point

Continued front page    F term (reference) 2B065 AA02 AA07 AB01 AC06 BB01                       CB01 CB10

Claims (2)

[Claims] 1. A transplanting machine comprising, at both ends of a rotating case, planting claws for scraping off the seedlings from the seedling table as the rotating case rotates and planting the scraped seedlings in the soil. Then, the transplanting machine is provided with a non-constant speed conversion mechanism that causes speed fluctuations in the rotation of the rotating case, and the highest speed point of rotation of the rotating case is adjusted immediately after the planting claws plant seedlings. A transplanter characterized by that. 2. The rotating area of the rotating case according to claim 1, wherein a maximum speed point is provided by being shifted by about 180 ° from the maximum speed point immediately after the planting, and the maximum speed point is provided when the planting claw scrapes seedlings. A transplanter characterized by increasing the speed of the rotating case.