JPS6335207B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention allows the traveling machine to support the planting device in a rollable manner, so that even if the traveling machine tilts from side to side due to variations in the depth of the tiller from side to side,
A rice transplanter configured to keep the planting device parallel or nearly parallel to the mud surface by rolling against the machine due to the reaction force of the mud surface, so that the planting depth on the left and right sides is constant or almost constant. And for details,
When viewed from the front, take a posture along both the left and right hypotenuses of the inverted trapezoid so that their extension lines intersect at or approximately the center of the width of the planting device, and at or near the ground contact part of the planting device. The present invention relates to a rice transplanter in which the planting device is suspended and supported from a traveling main machine via a pair of arranged left and right links so as to be able to roll freely.

In such a rice transplanter, the rolling center of the planting device relative to the machine is at or near the intersection of the extension lines of the respective pairs of links, so that the planting device is parallel or almost parallel to the mud surface due to the ground reaction force of the mud surface. When rolling against the machine so as to maintain the correct posture, the amount of lateral movement of the planting device due to this rolling can be kept to an extremely small amount, thereby suppressing the uneven displacement of the planted seedlings in the lateral direction. Although this method has advantages, it also has the following disadvantages in ridge work.

In other words, during ridge work, one of the left and right sides of the ground contact part of the planting device comes into contact with the ridge mud surface, which is harder and uneven than the mud surface in the center of the field.
Since the left and right sides of the ground contact part touch the ground on the muddy surface near the center of the field, the left and right sides of the ground contact part are subject to a larger ground reaction force than the other side, and the running main Generally, for the same reason as the mud surface, the ridge plowing plate is raised higher than the plowing plate in the center of the field, and the planting device is tilted to the opposite side of the ridge. As a result, one of the left and right sides of the ground-contacting part of the planting device hardly sinks below the mud surface, while the other side largely sinks below the mud surface. This causes the planting device to tilt significantly from side to side, which tends to cause large variations in planting depth between the left and right sides.

In view of this situation, it is an object of the present invention to make it possible to suppress variations in planting depth between the left and right sides even during ridge work by adding a simple structure to the left and right link pair.

Next, an embodiment of the present invention will be described based on the drawings. A multi-row planting device 3 is connected to the rear of the traveling machine 1 via a parallel four-link mechanism 2 so as to be able to rise and fall freely. The planting device 3 is configured to be able to roll freely with respect to the machine 1, and the planting device 3 is configured to be maintained in a posture substantially parallel to the mud surface by rolling with respect to the device 1 due to the mud surface ground reaction force. A certain riding rice transplanter, said machine 1
The vehicle includes a pair of left and right front steering wheels 4, 4, a pair of left and right rear drive wheels 5, 5, and a passenger driving section 6.

The planting device 3 mainly includes a planting mission case 7, a plurality of floats 8 located at appropriate intervals in the left and right directions, a seedling stand 9 that can be moved in a reciprocating manner in the horizontal direction, and the seedlings. Stand 9
By circulating the seedlings up and down in conjunction with the lateral movement of the seedlings, the seedlings placed on the seedling platform 9 are taken out in units of planting units and planted on the soil leveling mud surface by the floats 8 and the claw mechanism 10. Assembled and configured.

The support structure for the link mechanism 2 of the planting device 3 is formed on both left and right sides of an inverted trapezoid in front view so that their extension lines meet at the center of the width of the planting device 3 and at the ground contact part of the planting device 3. A pair of left and right links 11, 1 arranged in close alignment
The planting machine case 7 of the planting device 3 is suspended and supported by the link mechanism 2 via the link mechanism 1 through the link mechanism 1, and the planting device 3 is connected to the link mechanism 2.
The machine 1 centered around the intersection of the 1st and 11th pairs of extension lines.
By rolling against the planting device 3, it is configured to suppress lateral movement of the planting device 3 due to the rolling.

An operating device 12 that changes and fixes the position of the pivot connection points a, a of the pair of hanging links 11, 11 to the link mechanism 2 with respect to the link mechanism 2;
is provided, and by changing the position of the pivot connection points a, a, the horizontal and horizontal stable posture of the planting device 3 suspended by its own weight in a state where the planting device 3 is floated above the ground can be changed.

The operating device 12 has the hanging links 1, 1 pair pivotally connected to its left and right ends, and a front-back axis equidistant from the pivotal connection points a, a with the hanging links 11, 11 pair. A member 12A that swings the pivot connection points a and a up and down against the link mechanism 2 by swinging around the core It is composed of a manual operating lever 12B for dynamic operation, and an engaging portion 12C for engaging and fixing the manual operating lever 12B in a plurality of swinging positions.

According to the above configuration, by positioning the member 12A in a horizontal position, the horizontally stable position of the planting apparatus 3 suspended by its own weight with the planting apparatus 3 floating above the ground becomes a horizontal position, and the member 12A is placed in a horizontal position. By tilting the planting device 3
Member 12 is suspended due to its own weight and has a stable horizontal and horizontal posture with respect to the ground.
The posture is tilted in the same direction as A.

Therefore, like planting in the center of the field,
If the hardness and softness of the mud surfaces on which the left and right floats 8, 8 touch the ground are approximately equal, fixing the member 12A in a position parallel to the machine 1 will prevent the machine 1 from tilting to the left or right. Even if both floats 8,
The planting device 3 can be rolled with respect to the machine 1 so that the planting device 3 takes a posture substantially parallel to the mud surface by the mud surface ground reaction force acting on the mud surface. On the other hand, in the case of ridge work in which one of the left and right floats 8 is grounded on the hard mud surface at the edge of the ridge, and the other float 8 is grounded on the soft mud surface in the center of the field, Depending on the degree of inclination of the machine 1 to the opposite side of the ridge due to hardness/softness differences or the rise of the ridge plowing plate, the member 12A may be moved at the ridge side end or lower than the other end with respect to the machine 1. By fixing the ridge in the tilted position located at By making the amount of subsidence approximately equal, the planting depths on the left and right sides can be approximately equal.

In summary, in the rice transplanter according to the present invention, the position of the pivot connection point of the pair of hanging links to the main machine side or the position of the pivot connection point to the planting device side is fixed to the main body or the planting device. It is characterized by being provided with an operating device for changing and fixing the position.

That is, the pivot connection points a, a of the pair of hanging links 11, 11 to the main machine 1 side or the pivot connection points b, b to the planting device 9 side are set to the main machine 1 or the planting device 9.
By changing the position, the machine 1 is placed in a horizontal position, and the planting device 9 is suspended by its own weight with the planting device 9 floating above the ground. Since the left and right grounding loads of the planting device 9 when the device 9 is grounded can be changed, it is possible to change the horizontal ground load of the planting device 9 when the device 9 is grounded. Lowering link 11, 11
By adding a simple structure to the pair and changing and fixing the positions of the pivot connection points a, a, b, and b as in the above embodiment, the difference in hardness and softness of the left and right mud surfaces on which the planting device 9 touches the ground can be reduced. Even in furrow work where the ground reaction forces are different, the left and right ground contact parts of the planting device can be sunk almost equally below the mud surface, making it possible to make the planting depths on the left and right sides almost equal.

In the embodiment, the positions of the pivot connection points a, a of the pair of hanging links 11, 11 to the machine 1 side are changed, but in the present invention, the hanging links 11,
It is configured and implemented so that the positions of the 11 pairs of pivot points b and b to the planting device 9 side are changed, or the positions of both pivot points a, a, b, and b are changed together. Also good.

In addition, a sensor is provided to detect the hardness and softness of the left and right mud surfaces, and based on the detected binding of this sensor, the pivot connection points a, A mechanism for automatically changing the position of a may be incorporated and implemented.

[Brief explanation of drawings]

The drawings show an embodiment of the rice transplanter according to the present invention, and FIG. 1 is a side view, FIG. 2 is an enlarged side view of main parts, and FIG.
The figure is a sectional view taken along the - line in Fig. 2, Fig. 4 is a sectional view taken along the - line in Fig. 3, Fig. 5 is a schematic rear view showing the state in which the planting device is floated above the ground during ridge work, and Fig. 6 is a sectional view taken along the - line in Fig. 2. The figure is a schematic rear view showing a state in which the planting device is grounded during ridge work. 1... Traveling machine, 3... Planting device, 11,1
1...Link, 12...Operation device.

Claims (1)

[Claims] 1. An inverted trapezoid shape in front view, such that their extension lines intersect at or approximately at the center of the width of the planting device 9 and at or near the ground contact portion of the planting device 9. In a rice transplanter in which the planting device 9 is suspended and supported by the traveling main machine 1 through a pair of left and right links 11, 11 arranged along both the left and right oblique sides, the hanging links 11, 11 are provided. The position of the pivot connection point to the side of this machine 1 or the position of the pivot connection point to the side of planting device 9 is set to the side of this machine 1.
Or a rice transplanter characterized by being provided with an operating device 12 for changing and fixing the position relative to the planting 9. 2 The operating device 12 is connected to the hanging link 1
A member 12A on the machine 1 side that pivotally connects pairs 1 and 11.
, an operating lever 12B that swings so that its pivot connection point with the pair of hanging links 11, 11 swings up and down oppositely, and an engagement that engages and fixes the operating lever 12B in a plurality of swinging positions. 12. The rice transplanter according to claim 1, which comprises a joint portion 12C.