JPS60237904A - Seedling planting apparatus of 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 mat on a seedling platform in a rice transplanter and then planting the seedlings in a field.

Conventionally, this type of seedling planting device includes, for example,
As described in Publication No. 22, there is a rotary set in which a rotating body is provided with a plurality of divided pawls, and
As described in Publication No. 9-27762, in the case of planting with a split claw at the tip, the base end of the rod is connected to the fuselage side via a fan link, while the planting has a splitting claw at the tip. It is a swinging type that is pivotally attached to the tip of a crank fixed to a claw shaft that is rotationally driven by an engine, and the rotation of the crank moves the stem up and down so that the tip of the split claw draws a closed loop trajectory. There was something.

The former type of rotary set has the feature that there is no vibration in the rotation of the rotating body and it is possible to plant multiple times per rotation of the rotating body, but on the other hand, the closed loop of the movement locus at the tip of each divided claw is a circle with a large curvature. The split claws tend to damage the leaves of the seedlings when they enter the seedling mat, and after the seedlings are planted in the field, the split claws do not quickly escape from the later seedlings, making it difficult to plant the seedlings. The latter has drawbacks such as unstable posture, while the latter swing type allows the closed loop of the movement trajectory at the tip of the dividing claw to be shaped into an elongated ellipse in the vertical direction, making it easy to separate the seedlings from the seedling mat. In addition to being able to reduce damage to seedlings, after planting seedlings in the field, the split claws quickly escape from later seedlings and stabilize the posture of seedlings. Vibration occurs due to the rapid vertical movement of the rod, and this vibration is
The speed increases in proportion to the speed of vertical rotation, and since this type of thing can only plant seedlings once per - number of vertical rotations, that is, per crank rotation, the speed of planting cannot be increased. be.

The present invention provides a simple and lightweight seedling planting device that has the features of both the rotary set seedling planting device and the swinging type seedling planting device. In other words, the rotary set is used as the curtain, and when multiple plants are attached to the rotary body, the tips of the split claws on the rod are shaped like vertically elongated ellipses, similar to the tips of the split claws in the swing-type seedling planting device. It is designed to draw a closed-loop motion trajectory.

For this reason, the present invention fixes a rotating body to a rotating shaft that is horizontally supported on the body of a rice transplanter and receives power from a power source,
At the center of rotation of the rotary body, a sun wheel is arranged, which is configured to be non-rotatable with respect to the body but rotatable with respect to the rotary body. Planting shafts are supported parallel to the rotating shaft at positions separated by an appropriate distance and equally divided in the rotational circumferential direction of the rotating body, and each planting shaft is planted with split claws. Attach the rod, and fit a chain or belt-transmitted planetary wheel on the solar wheel so that the shaft rotates once with one rotation of the rotating body, and this planetary wheel or the solar wheel, It is constructed as an eccentric wheel body or an elliptical shaft body.

The present invention will be explained below with reference to drawings of embodiments. In the drawings, reference numeral 1 denotes a transmission case in the body of a rice transplanter. A boss body 2 protrudes horizontally from the side surface of the transmission case 1, and inside the boss body 2. A rotating shaft 3 that is rotationally driven by power transmission from an engine (not shown) mounted on the body of the rice transplanter is inserted, and an oval shaped shaft is inserted into the end of the rotating shaft 3 that protrudes from the boss body 2. A hollow rotating body 4 is fitted therein, and the rotating body 4 is configured to be rotated in the right direction of arrow A when viewed from the side.

At the center of the rotating body 4, a solar sprocket 5, which is an example of a solar transport body, is rotatably fitted into the boss body 2 and is arranged so as to be rotatable with respect to the rotating body 4. The sun sprocket 5 is non-rotatably locked to the transmission case 1 by appropriate rotational phase adjustment means (not shown).

At both left and right ends of the rotating body 4, support shafts 6.6 are non-rotatably supported with respect to the rotating body 4 in parallel with the rotating shaft 3 at positions equal in distance from the rotating shaft 3. The shafts 7 are rotatably fitted into the hollow planting shafts 6 and 6, and one end of the shafts 7, 7 protrudes to the outside of the rotating body 4, and a dividing claw is attached to the projecting ends. For planting with a rod 9, the rod 8 is attached, and for the planting, the split claw 9 of the rod 8 is attached to the shaft 7. is a planetary sprocket 1 which is one embodiment of a planetary wheel.
1 is fitted, and an endless chain 12 is wound between the planetary sprockets 11 and 11 and the sun sprocket 5, and by one revolution of the rotating body 4, both shafts 7 and 7 are planted.
Each of the above-mentioned plantings is arranged so that it rotates once, and each of the above-mentioned plantings is done by moving both planetary subrockets 1-11. It is constituted by an eccentric sprocket that is eccentric by (e).

A pair of tension mechanisms 13 are provided in the rotating body 4 to press the endless chain 12 against the sun sprocket 5 between the sun sprocket 5 and both planetary sprockets 11 and 11. is a lever 1 whose base end is pivotally connected to a rotating body 5 with a pin 14.
5, a tension roller 16 attached to the tip of the lever 15 and in sliding contact with the outer peripheral surface of the chino 12; and the tension roller 0-. It is composed of a screw 6 and a spring 17 for pressing against the 16tr chain 12. In addition, the number of sun sprockets 5 is made into two, and a chino 12 is separately wound between one of the sun sprockets 5 and one of the planet sprockets 11, and between the other sun sprocket 5 and the other planet sprocket 11. In other embodiments, instead of using sprockets as described above, the solar wheel and the planetary wheel may be configured as pulleys, and a belt may be wound between them. good.

In this configuration, when the rotating body 4 revolves in the right direction of the arrow A by its rotating shaft 3, both plantings are connected to the sun sprocket 5, which cannot rotate with respect to the transmission case 1, via the endless chain 12 and the planetary sprocket 11. is axis 7.7
As the rotating body 4 revolves, it rotates to the left of the arrow B by the same rotation angle as the rotation angle of the rotating body 4, that is, in the opposite direction to the revolution direction of the rotating body 4. The planting rod 8 attached to the seedling tray 7 rotates around the rotating shaft 3 while facing the direction of the seedling tray 10. When descending from top to bottom on the side where the seedling is to be removed, the tip of the dividing claw 9 is used to divide one seedling from the seedling cloak on the seedling platform 10, and then the seedling is planted in the field area 18 near the lower limit of descent, and then It rises from the field scene 18 at .

In this case, when the planetary sprocket 11 on the shaft 7.7 is not an eccentric sprocket, the both plantings are carried out on the shaft 7.
, 7, the rotation angle of the leftward rotation of the arrow B is the rotation angle of the rotating body 4.
Since the rotation angle of revolution to the right toward the arrow in is the same, both plantings are attached to the shaft 7.7, and the planting with the split claw 9 is attached to the rod 8. , by rotating in the opposite direction to its revolution direction with a delay of the same rotation angle,
During each planting, the rod 8 faces the direction of the seedling platform 10 and rotates while maintaining a constant attitude toward the seedling platform 10. The closed loop of the motion trajectory is only circular with the radius being the distance from the rotation axis 3 to the axis 7, but in both cases the planetary sprocket 11 on the axis 7.7 is eccentrically centered as described above. By configuring it as a sprocket, both plantings occur as the rotating body 4 revolves to the right, and the rotation of the shaft 7 to the left is caused by its -
During rotation, the rotation speed of the rotating body 4 becomes faster or slower due to the difference in diameter of the eccentric planetary sprocket 11.

Therefore, with respect to the revolution of the rotating body 4, the planting is carried out when the rotation of the axis 7 to the left slows down, and the planting is carried out when the axis 7 of the rod 8 descends to approach the field area 18. By setting the time when the rotation to the left becomes faster corresponds to the time when the planting rises closer to the upper limit of the rise of the rod 8, each planting rod 8 is placed in the field scene 18. As it approaches and descends, it rotates to the left later than the revolution of the rotating body 4 and changes its attitude downward, and as it approaches the upper limit of ascent, it moves further to the left than the revolution of the rotating body 4 and rotates on its own. Since each planting changes its posture upward, the closed loop of the motion trajectory of the tip of the dividing claw 9 of the rod 8 is an elliptical closed loop curve 19 elongated in the vertical direction, as shown by the two-dot chain line in FIG.
It becomes.

In the above embodiment, the sprocket or the pulley 9- or other planetary wheel was configured as an eccentric planetary wheel, but instead of making this planetary wheel an eccentric planetary wheel,
Even when the planet wheel is constructed as an elliptical wheel, the rotational speed of the planting wheel becomes faster or slower during one revolution of the shaft 7, so the planting occurs at the tip of the split claw 9 on the rod 8. The motion locus becomes a vertically elongated elliptical closed loop, and the same effect as described above can be obtained.In addition, the planetary wheel body 12 may be configured as an eccentric planetary transport body or an elliptical planetary wheel body. Alternatively, both the planet wheel such as a sprocket or a pulley and the sun wheel may be configured as an eccentric wheel or an elliptical wheel (of course, both the planet wheel and the sun wheel may be configured as an eccentric wheel or an elliptical wheel). can also be configured as an eccentric or elliptical ring). In addition, when planting, the number of rods 8 is not limited to two as in the above embodiment,
It is also possible to arbitrarily divide three or more pieces equally in the rotational circumferential direction of the rotating body 4, and when planting, the stem 8 changes its posture upward as it descends toward the field area 18. The timing of planting can be adjusted arbitrarily by adjusting the rotational phase position of the solar wheel such as the sun sprocket 5 with respect to the transmission case 1.Furthermore, as in the embodiment of the drawings, the planting can be done at the 8th pole. For planting, attach to the shaft 7 by using the base and split claws 9.
If the part to which the split claw 9 is attached or the tip of the split claw 9 is shifted by an appropriate dimension (S) in the axial direction of the rotating shaft 3 in the plan view of FIG. The spacing between the shafts 7, 7 can be narrowed during both planting operations in a state where collision interference with the seedling planting device is avoided, thereby making it possible to downsize the seedling planting device.

As described above, the present invention has the configuration described in the claims, so that each of a plurality of plants can be planted on one rotating body vertically on a rod, similar to the case of a vertically swinging type seedling planting device. Since the motion of a long and narrow closed loop can be imparted, multiple seedlings can be planted in one seedling planting row at high speed without increasing vibrations, significantly improving the efficiency of rice planting work. Moreover, in the present invention, the direction and posture of each planting rod is controlled as described above by transmission between the solar wheel at the center of the rotating body and the planting shaft.
The solar wheel and the planting have the advantage that there is no structural complexity and no increase in weight, as in the case of gear transmission between the shafts.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a front view, FIG. 2 is a plan view, FIG. 3 is an enlarged sectional view taken along the line ■-■ of FIG.
The drawing is a front view taken along the line IV-IV in FIG. 3. 1...Transmission case, 3...Rotating shaft, 4...
Rotating body, 5... Solar sprocket which is one embodiment of the solar transport body, 7... Planting is done on axis, 8... Planting is on rod, 9... Division claw, 11 ... Planetary sprocket, which is one embodiment of the planetary wheel, 12... Cheno. Patent applicant Yanmar Agricultural Machinery Co., Ltd. Rime

Claims (1)

[Claims] (1) A rotating body is fixed to a rotating shaft that is horizontally supported on the body of the rice transplanter and receives power from a power source, and the rotational center of the rotating body is fixed to a rotating shaft that cannot rotate with respect to the machine. A solar wheel configured to be freely rotatable with respect to the rotating body is disposed on the rotating body, and the solar wheel is placed at a position an appropriate distance in the radial direction from the rotating shaft to which it is attached, and at an equal distance in the circumferential direction of the rotating body. For planting in separate locations, a shaft is supported parallel to the rotational axis, and for each planting, a rod is attached to the shaft for planting with split claws, and the planting is performed by one rotation of the rotating body on the solar wheel. The rice planting is characterized in that a planetary wheel which is transmitted by a chino or belt is fitted so that the axis rotates once, and the planetary wheel or the solar wheel is configured as an eccentric wheel or an elliptical wheel. Machine seedling planting device.