JPH0930A - Transplanter - Google Patents

Abstract

PURPOSE: To provide a transplanter, capable of simplifying a structure, minimizing the collapse of a nursery bed of a mat seedling, improved in seedling holding properties and transplanting accuracy of transplanting pawls and useful for a rice transplanter, etc., by setting a scraping off motional area of the transplanting pawls in an accelerating area of a nonuniform motional mechanism. CONSTITUTION: This transplanter is obtained by interposingly installing a nonuniform motional mechanism for causing the fluctuation in velocity of a local motion of transplanting pawls 26 in a power transmission passage of the transplanting pawls 26 and setting a scraping off motional area of the transplanting pawls 26 in an accelerating area of the nonuniform motional mechanism in the transplanter capable of scraping off a transplanted seedling from a seedling-carrying platform based on the local motion of the transplanting pawls 26 and transplanting the scraped off transplanting seedling in soil. Furthermore, a decelerating area of the nonuniform motional mechanism is preferably set between the scraping off motional area of the transplanting pawls 26 and a motional area thereof in soil.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transplanter such as a rice transplanter.

[0002]

BACKGROUND OF THE INVENTION Generally,
The planting claws provided in this seed transplanting machine scrape a predetermined amount of transplanted seedlings from the mat seedlings on the seedling mounting table based on a predetermined locus motion, and plant the scraped transplanted seedlings in the soil, Since the seedling placing table is always fed laterally at a speed according to the scraping amount of the transplanted seedlings, when scraping the transplanted seedlings, a relative lateral displacement occurs between the planting claw and the mat seedlings, resulting in a mat. There was a problem that the soil of the seedlings was destroyed and the ability of the planting nails to hold the seedlings was reduced. Therefore,
Although it is possible to increase the scraping speed of the planting claw to reduce the collapse of the floor soil, the movement speed of the planting claw (relative speed to the vehicle speed) is set in relation to the planting stock. The reality is that it cannot be changed indiscriminately.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances and was devised with the object of providing a transplanter capable of solving these problems.
In a transplanter that scrapes the transplanted seedlings from the seedling mounting table based on the locomotion of the transplanted nails, and in the transplanter that transplants the scraped transplanted seedlings into the soil, in the power transmission path of the transplanted nails, It is characterized in that a non-uniform velocity motion mechanism that causes velocity fluctuations in the locus motion is provided and the scraping motion range of the planting claw is set to the speed increase range of the non-uniform velocity motion mechanism. In addition, in a transplanter that scrapes the transplanted seedlings from the seedling mounting table based on the locus movement of the planting nails and plant the scraped transplanted seedlings in the soil, the planting nails are planted in the power transmission path. A non-uniform velocity motion mechanism that causes speed fluctuations in the trajectory of the nail is installed, and a deceleration region of the non-uniform velocity motion mechanism is set between the scraping motion range of the planted nail and the soil motion range. It is characterized by. Then, the present invention, by this configuration, when scraping the seedlings from the seedling mounting table, it is possible to improve the seedling holding property of the planting nails by minimizing the collapse of the bed soil of the mat seedlings. is there.

[0004]

Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a planting work unit connected to a rear part of a body of a riding type rice transplanter through a lifting link mechanism, and the planting work unit 1 is a working unit frame 2 connected to the lifting link mechanism, Seedling stand 3 supported by the working unit frame 2 so as to be able to reciprocate left and right, a transmission case assembly 4 integrally assembled to the working unit frame 2, and a transmission case assembly 4
It is composed of the float 5 and the like disposed in the lower part of the above, but the basic structure of each of them is the same as the conventional one.

The transmission case assembly 4 comprises a drive case 7 having an input shaft 6, a distribution case 8 projecting left and right from the drive case 7, a plurality of planter cases 9 projecting rearward from the distribution case 8, and the like. ing. Then, the power input to the input shaft 6 (PTO power on the machine side, which changes the relative speed with respect to the vehicle speed in accordance with the inter-stock adjustment) is transmitted to the distribution shaft 11 in the distribution case 8 via the bevel gear mechanism 10. The vertical feed shaft 12 supported by the drive case 7 and the planter shaft 13 supported by the tip of each planter case 9 are distributed via chain transmission mechanisms 14 and 15, respectively.

When power is transmitted to the vertical feed shaft 12, the vertical feed drive cam 12a at one end is used to move the operating lever of the vertical feed mechanism (not shown) provided on the seedling table 3 to the turning point of the horizontal feed. Each time it hits, the mat seedlings on the seedling mounting table 3 are vertically fed by a predetermined amount based on the operation of the vertical feeding mechanism accompanying this hitting operation, but the power of the vertical feeding shaft 12 is the other end side. It is adapted to be transmitted to the screw shaft 17 through the lateral feed transmission mechanism 16 configured as described above.

A slide block 18 is externally fitted to the screw shaft 17, and the slide block 18 is integrally connected to the seedling table 3 via a slide bar 19. That is, when the slide block 18 reciprocates leftward and rightward as the screw shaft 17 rotates in one direction, the seedling table 3 is laterally fed in conjunction with this, and therefore, the seedling table 3 is placed on the seedling table 3. The lower end of the mat seedling that slides along the apron 20 in which the scraping port 20a is formed is slidable.

On the other hand, reference numeral 21 denotes a rotary case provided at one end portion or both left and right end portions of the planter shaft 13. The rotary case 21 rotates integrally with the planter shaft 13, but at the center portion of the case, A sun gear 22 is installed that is rotatably supported by the planter shaft 13 and that meshes with the planter case 9 side to prevent rotation. The sun gear 22 includes a pair of intermediate gears 2.
3 meshes at positions shifted by 180 degrees, and planet gears 24 mesh with each intermediate gear 23.

Reference numeral 25 denotes a planter arm provided with a planting claw (planter beak) 26, and a cylindrical shaft 27 integrally projecting from a base end portion of the planter arm 25 is provided at both end portions of the rotary case 21. It is rotatably supported and spline-coupled to the planet gears 24.
That is, when the planter shaft 13 is rotated to perform the planting work, the rotary case 21 is rotated along with the rotation, and the intermediate gear 23 is rotated while revolving around the fixed sun gear 22. Since the planetary gear 24 that meshes with the intermediate gear 23 rotates in the reverse direction, the planter arm 25 integrally connected to the planetary gear 24 revolves around the planter shaft 13 while rotating the cylindrical shaft 27. The rotation of the planter arm 25 in the opposite direction about the center of the rotary case 2
Regardless of the rotation of 1, it always faces the seedling stand 3 side.

The sun gear 22, the intermediate gear 23 and the planetary gear 24 are all eccentric gears.
That is, after the planting claws 26 scrape the seedlings from the seedling mounting table 3, they reach a planting position in the soil while drawing an arc that swells forward, and then linearly rise in a half-moon-shaped stationary locus (running stop). The angular velocity of the eccentric gear is set so as to draw a tip movement locus), but when one of the planting claws 26 scrapes the seedlings from the seedling mounting table 3, at the same time, the other planting claw 26 plants the seedlings. When the other planting claw 26 scrapes the seedlings from the seedling placing table 3, at the same time, the position setting and the trajectory setting of the planting claw 26 are performed so that the one planting claw 26 carries out the planting. Thus, the planting is performed twice each time the rotary case 21 makes one rotation.

Further, 28 is a cam shaft supported in the cylindrical shaft 27, and the cam shaft 28
The base end of the cam 2 is integrally fixed to the rotary case 21, and the tip of the cam 2 faces the inside of the planter arm 25.
8a is integrally formed. On the other hand, 29 is a planting nail 2
6 is a planter fork that can move back and forth along the inner surface of the rod 6, and a rod 29a that constitutes the base end side of the planter fork 29 is constantly urged backward by the ammunition 30 and the other end side is the cam 28a. Swing arm 3 for contact with
1 is engaged with one end side. When the planting claw 26 reaches the planting position during the planting operation accompanying the rotation of the rotary case 21, the large-diameter portion of the cam 28 a causes the swing arm 31 to move.
Planter fork 2 that presses the other end of the
The seedlings are pushed out from the planting claw 26 based on the forward movement operation of 9.

Now, a chain transmission mechanism 15 for transmitting power from the distribution shaft 11 to each planter shaft 13.
Is a transmission chain 35 suspended between a driving sprocket 32 integrally provided on the distribution shaft 11 side and a driven sprocket 34 connected to the planter shaft 13 side via a planter clutch mechanism 33. Although the slack side of the transmission chain 35 is configured to be pressed by the centite 36, the driven side sprocket 34 is formed of a non-circular sprocket (having the same number of teeth as a conventional circular sprocket) such as an elliptical sprocket. That is, the chain transmission mechanism 15 constitutes a non-constant speed motion mechanism that causes velocity fluctuations in the trajectory movement of the planting claw 26, but the two speed-up regions that occur during one rotation are the planting claws. 26, while the deceleration area is set to match the intermediate movement area between the scraping movement area and the soil movement area. Without changing the overall speed (planting cycle) of the attachment claw 26, the scraping movement speed and the soil movement speed are increased, and the movement speed in the intermediate movement range holding the scraped seedlings is reduced. Has become.

In the embodiment of the present invention constructed as described above, the planting claw 26 provided on the rotary case 21 is
As the rotary case 21 rotates, a predetermined locus movement is performed, and based on the locus movement, the seedlings 3 are scraped off and the scraped seedlings are planted in the soil. Since the chain transmission mechanism 15 for transmitting power to the plant is configured as a non-constant speed motion mechanism using a non-circular sprocket, and the speed increasing range is matched with the soil motion range of the planting claw 26, It is possible to increase the soil movement speed without changing the overall speed (planting cycle). Therefore, as shown in FIG. 6, even if the overall speed of the planting claw 26 is reduced to perform work in a wide range of plants (for example, 24 cm), a required movement speed can be secured in the soil. In other words, after planting the seedlings, it is possible to correct a conventional running locus (the tip movement locus during running) in which the planting claws 26 drag the planted seedlings to accommodate a wide range of stocks.

Further, when the planting claws 26 scrape the seedlings from the seedling mounting table 3, the movement speed thereof is increased, so that as shown in FIG. 7, the lateral feed amount of the seedling mounting table 3 during scraping. Is smaller than the conventional one, and as a result, it is possible to minimize the collapse of the bed soil of the mat seedling and improve the seedling holding property of the planting claw 26.

On the other hand, after the planting claws 26 scrape off the seedlings, in the intermediate motion range where the scraped seedlings are held up to the planting position, the speed of motion is reduced, so centrifugal force acting on the scraped seedlings, etc. As a result, it is possible to improve the accuracy of planting by reducing the variation and throwing of scraped seedlings.

Since the sprocket of the chain transmission mechanism 15 for transmitting the power of the planting pawl 26 can be implemented with a simple structure such as changing to a non-circular sprocket, the planting pawl 26 can be implemented.
Perhaps it is possible to reduce the implementation cost by eliminating the need to make large-scale design changes such as revising the locus, or it is possible to meet various stock specifications by simply changing the angular velocity setting of the non-circular sprocket.

Further, in the present embodiment, the rotary case 21 in which two planting claws 26 are planted alternately is used, but the two planting claws 26 respectively perform a scraping motion and a planting motion. Since the simultaneous motion range for simultaneous motion is secured and the simultaneous motion range is set as the acceleration range for the non-uniform velocity motion, the scraping motion region and the planting motion region are increased without using a complicated non-uniform velocity motion mechanism. It has the advantage of speeding up.

The present invention is of course not limited to the above-mentioned embodiment. For example, in the above-mentioned embodiment, a rotary type in which two planting claws are alternately planted is adopted, and The movement is made non-uniform by using an elliptical sprocket, but it can be carried out by adopting a crank type in which one planting claw is used for planting, or by adopting another non-uniform motion mechanism. Needless to say. Further, as in the second embodiment shown in FIGS. 8 and 9, after the power is once transmitted to the driven side sprocket 34 formed of the circular sprocket, the power is transmitted to the non-uniform speed motion composed of the pair of elliptical gears 40. It may be transmitted to the planter shaft 13 via a mechanism, and this may result in a transmission chain 35 that may occur when using non-circular sprockets.
It is possible to prevent the periodic vibration of the gears and to smoothly and reliably transmit the power based on the meshing of the gears. Furthermore, as in the third embodiment shown in FIG. 10, after the power input by the input shaft 6 is temporarily transmitted to the intermediate shaft 41, the power is transmitted to the vertical feed shaft 12 via the chain transmission mechanism 14. On the other hand, the pair of elliptical gears 42
Alternatively, it may be transmitted to the distribution shaft 11 via a non-uniform velocity motion mechanism including. That is, in this structure, in order to make the planting power unequal speed before distributing the power from the distribution shaft 11 to each planter shaft 13, all of the plurality of chain transmission mechanisms 15 are configured as unequal speed motion mechanisms. Compared with the first embodiment described above, there is an advantage that the structure can be simplified, or the specification of the stock can be changed at one place.

[0019]

[Advantageous Effects] In summary, since the present invention is configured as described above, the transplanted seedlings are scraped from the seedling mounting table based on the locus movement of the planting nail, and the scraped transplanted seedlings are placed in the soil. Although it is to be planted, in the power transmission path of the planting claw, an unequal speed motion mechanism that causes speed fluctuations in the locus movement of the planting claw is provided, and the scraping motion range of the planting claw is set. Since the speed is set in the speed increasing range of the non-uniform speed motion mechanism, the scraping motion speed can be increased without changing the overall speed (planting cycle) of the planting claw. Therefore, the lateral feed amount of the seedling placing table during the scraping becomes small, and as a result, the collapse of the bed soil of the mat seedling can be minimized and the seedling holding property of the planting nail can be improved.

Further, when the deceleration region of the unequal velocity motion mechanism is set between the scraping motion region of the planting nail and the soil motion region, the centrifugal force acting on the scraped seedling is reduced. Therefore, it is possible to improve the planting accuracy by reducing the dispersal and throwing of the scraped seedlings.

[Brief description of drawings]

FIG. 1 is a development view showing a power transmission path of a planting section.

FIG. 2 is a side view of a main part of a planting part.

FIG. 3 is a partially cutaway side view of a planter case and a rotary case.

FIG. 4 is a plan sectional view of the same.

FIG. 5 is a side view showing a non-uniform speed motion mechanism.

FIG. 6 is an operation explanatory view showing a locus of a planting nail.

FIG. 7A is a sectional view of a mat seedling showing a conventional scraped state, and FIG. 7B is a sectional view of a mat seedling showing the scraped state of the present invention.

FIG. 8 is a plan sectional view of a planter case and a rotary case showing a second embodiment.

FIG. 9 is a side view showing the non-uniform velocity motion mechanism of the second embodiment.

FIG. 10 is a development view showing a power transmission path of a third embodiment.

[Explanation of symbols]

 1 Working part with planting 3 Seedling table 9 Planter case 13 Planter shaft 15 Chain transmission mechanism 21 Rotary case 25 Planter arm 26 Planting claw 34 Sprocket on the driven side

Claims (2)

[Claims] 1. A transplanting machine for scraping transplanted seedlings from a seedling mounting table based on the locus movement of the transplanted nails and planting the scraped transplanted seedlings in the soil in a power transmission path of the transplanted nails. In addition, a non-uniform velocity motion mechanism that causes speed fluctuations in the trajectory movement of the planting claw is provided, and the scraping motion range of the planting claw is set to the speed increasing range of the non-uniform speed motion mechanism. Transplanter. 2. A transplanting machine for scraping transplanted seedlings from the seedling mounting table based on the locus movement of the transplanted nails and planting the scraped transplanted seedlings in the soil in a power transmission path of the transplanted nails. In addition to interposing a non-uniform velocity motion mechanism that causes velocity fluctuations in the trajectory motion of the planting claw, a deceleration region of the non-uniform velocity motion mechanism is provided between the scraping motion range of the planting claw and the soil motion range. A transplanter characterized by being set.