JP2688192B2 - Seedling plant in rice transplanter - Google Patents

Description

Description: BACKGROUND OF THE INVENTION [0001] The present invention relates to a rice transplanter,
The present invention relates to a rotary seedling plant for dividing seedlings one by one from a seedling mat on a seedling mounting table and planting the seedlings in a field scene. 2. Description of the Related Art Conventionally, a seedling planting device of this type has a base end of a seedling planting case having a split seedling claw at its tip, as described in, for example, Japanese Patent Publication No. 49-27662. While connecting to the machine side via a fan link, the middle part of the seedling planting case is pivotally attached to the tip of a crank fixed to a claw shaft that is rotationally driven by the engine, and the seedling planting case is rotated by the rotation of the crank. , The tip of the dividing claw is configured to swing up and down so as to draw a locus of an elliptical closed loop that is long in the vertical direction, so that the seedling is not damaged when dividing the seedling from the seedling mat,
After planting the seedlings in the field, the split claws quickly escaped from the seedlings, stabilizing the planting posture of the seedlings,
This crank-type seedling plant has problems that vibration is remarkably large due to its vertical swing, and that the planting speed is slow. [0003] In order to reduce the vibration and increase the planting speed, for example, Japanese Patent Publication No. Sho 49-17806.
As described in Japanese Unexamined Patent Publication (Kokai) No. Sho-49-17807, etc., a rotating case driven by power transmission from a power source is mounted on an airframe near a seedling mounting table around a substantially horizontal horizontal axis. A plurality of planting shafts are respectively supported on the outer peripheral portion of the rotating case in parallel with the axis line, and each planting shaft has a seedling planting case provided with a split claw. A mechanism in which the split claws are mounted in such a manner as to face the seedling mounting table, respectively, and a non-uniform rotation is transmitted to the planting shafts in the rotating case with the rotation of the rotating case. A rotating seedling that is configured to swing each of the seedling cases so that the tips of the split claws in the seedling case draw a vertical elliptical closed-loop trajectory. A device has been proposed. However, in this rotary seedling planting apparatus, the peripheral speed of the tip of the split claw when the split claw in the seedling planting case comes out of the field scene has an elliptical shape that is long in the vertical direction. Because it swings and swings so as to draw a closed loop trajectory, it is considerably faster than the crank type seedling planting device, so the seedlings that should have been planted once in the field scene,
When the split claw comes out of the field scene, it is often raised together with the split claw, so that there is a problem that the certainty of planting the seedling is lower than that of the crank type seedling planting apparatus. [0005] The present invention is to provide a rotary seedling-planting apparatus which can surely solve the above-mentioned problems of the conventional one, without increasing the size of the apparatus in a form that ensures easy maintenance. Technical issues. In order to achieve this technical object, the present invention provides a "rotating case which is rotationally driven by power transmission from a power source to a machine body near a seedling stand. It was provided so as to rotate around a substantially horizontal lateral axis, and a plurality of planting shafts were respectively supported on the outer peripheral portion of this rotating case in parallel with the axis, and each planting shaft was provided with a split claw. While mounting the seedling planting cases with their split claws facing toward the seedling table, the seedling planting case transmits non-constant rotations to the planting shafts in the rotating case as the rotating case rotates. By providing the mechanism as described above, each of the seedling planting cases is pivoted with respect to the rotating case so that the tip of the dividing claw in the seedling planting case draws a motion locus of an elliptical closed loop that is long in the vertical direction. Smell planting equipment composed of Then, each of the seedling planting cases is formed into a hollow body, and the split claws are provided at one end of the seedling planting case, while the seedlings split by the split claws are attached to the tip of the split claws. An extruding tool adapted to be pushed out is provided so as to project from the lower surface of the seedling planting case, and further, in the seedling planting case, with respect to the rotating case of the seedling planting case when the split nail enters the field scene. A cam configured to actuate the pushing tool toward the tip of the split claw by pivoting is provided so as to be non-rotatably attached to the rotating case via a drive shaft. The planting shaft and the drive shaft are double shafts having the same axis. " DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following is a description of the drawings of an embodiment in which the embodiment of the present invention is applied to a walking type Nijo Ueda transplanter. In the figure, reference numeral 1 denotes an engine 2 at the front.
A transmission case including a seedling mounting table 3 and a handle 4 at the rear.
A rice transplanter having a float 6 that slides in a field scene B is provided on the lower surface of an airframe 5 that also serves as a paddle, and wheels 7 are mounted on both left and right sides of the aircraft 5 via a swing case 8. A claw shaft 9, which is rotationally driven by power from the engine 2, is supported on the machine body 5 in a substantially horizontal and lateral direction at a position in front of the seedling mounting table 3. A rotary seedling plant 10 described below is mounted. The rotary seedling plant 10 is shown in FIGS.
As shown in FIG. 1, an oval-shaped rotating case 11 is fitted to and fixed to an end of a claw shaft 9 pivotally supported on the machine body 5, and the rotating case 11 is viewed from the side of the rice transplanter 1 by the claw shaft 9. As shown by an arrow A, the sun gear 1 rotates on the claw shaft 9 in the rotating case 11.
2 is rotatably fitted, and the sun gear 12 is non-rotatably locked to the machine body 5 via a suitable rotation phase adjusting means 13. At the outer peripheral portion of the rotating case 11, that is, at both left and right end portions, a position where the distance from the claw shaft 9 is equal,
A drive shaft 14 for an extruder (to be described later) is supported in parallel with the claw shaft 9, and both drive shafts 14 are fixed non-rotatably to the rotating case 11, and are mounted on the drive shafts 14. The planetary gear 15 having the same number of teeth as the sun gear 12 is rotatably fitted. In the rotating case 11, an intermediate shaft 16 is supported at an intermediate position between the claw shaft 9 and the two drive shafts 14. On both the intermediate shafts 16, both the sun gear 12 and the planetary gear 15 are provided. By fitting the meshing intermediate gear 17, the intermediate gear 17 meshing with the sun gear 12, the planetary gear 15 meshing with the intermediate gear 17, a cam gear 24 a and a missing tooth stopper gear 25 a, which will be described later, A gear train is configured to transmit unequal-speed rotation to the planting shaft 18 fitted on each drive shaft 14 with the rotation of the rotating case 11 (in this case, the planetary gear 15 is directly connected to the sun gear 12). It may be made to mesh with each other). On the other hand, a planting shaft 18 of a hollow shaft is rotatably fitted on both the driving shafts 14 in the rotating case 11, and one end of the planting shaft 18 and the driving shaft 14 are
At the protruding ends of the planting shafts 18, the hollow seedling case 20 having the splitting claws 19 of the seedlings is protruded out of the rotating case 11 so that the splitting claws 19 face the seedling mounting table 3. To fix each other. Each of the seedling cases 20 is provided with the planting shaft 1.
8 and a lid 20b removably attached to the upper surface of the main body case 20a so as to cover the opening on the upper surface.
The split claw 19 is attached to one end of the main body case 20a. In this case, the lid 20b
In FIG. 4 as viewed from the axial direction of the claw shaft 9, it is configured so as not to contact the tip of the split claw 19 in another seedling plant 20 during rotation of the rotating case 11. . The planetary gears 15 on the two drive shafts 14 have pawls 21 projecting toward the planting shafts 18.
A claw 22 protruding toward the planetary gear 15 is integrally provided on the planting shaft 18, and the claws 21 and 22 are brought into contact with each other when the planetary gear 15 rotates clockwise, so that the planetary gear 15
Are configured to separate from each other when they rotate to the left,
A ring-shaped spring body 23 is provided between the claws 21 and 22 to urge the claws 21 and 22 in a direction in which the claws 21 and 22 come into contact with each other, and the left-handed rotation of the planetary gear 15 is planted by the ring-shaped spring body 23. It is configured to transmit elastically to the shaft 18. On the other hand, each seedling case 20 has a hollow guide shaft 27 extending in parallel with the split claws 19 so as to be vertically movable such that the lower end thereof protrudes downward from the lower surface of the seedling case 20. And a pusher 28 is provided at the lower end of the hollow guide shaft 27, and a spring 29 that presses and urges the guide shaft 27 downward is provided therein. A lever-type operating body 30 is provided in each of the seedling-planting cases 20. One end of the operating body 30 is rotatably pivotally connected to a pin 31 while the other end 32 is connected to the guide shaft 27. The operating body 3 is rotatably and non-slidably engaged with the upper end.
The pusher 28 is configured to move up and down by the vertical rotation of 0. Further, the drive shaft 14 is inserted into the seedling case 20, and the cam 33 is attached to the drive shaft 14 in the seedling case 20. The operating member 3 is fixed to the outer peripheral surface of the cam 33.
0, and the outer peripheral surface of the cam 33 is shaped such that the operating body 30 pivots downward only when each of the seedling cases 20 is near the lower limit of its lowering. To be configured. Further, a cam gear 24a (large diameter) having an arc-shaped outer peripheral surface 26a and a toothless portion 26b in a part of the circumference is fitted to both intermediate shafts 16 in the rotating case 11, respectively. A toothless stopper gear 25a (small diameter) in which some teeth on the circumference are cut out is fitted to both the planting shafts 18 in the rotating case 11, respectively. On the side facing the seedling mounting table 3 with the rotation in the direction A, slightly lower than the lower limit of the lowering from the height position corresponding to the lower end of the seedling mounting table 3 (that is, the position where the rotating case 11 becomes substantially horizontal). (That is, the position where the split claw 19 has entered the field scene B to a predetermined depth) in the section of the cam gear 24 a of the intermediate shaft 16.
By contacting the arc-shaped outer peripheral surface 26a with the missing tooth portion of the toothless stopper gear 25a of the planting shaft 18, the left rotation of the planting shaft 18 is delayed in the section. In this configuration, when the rotating case 11 of the seedling plant 10 revolves around the claw shaft 9 in the direction of arrow A, the planting shaft 1 fitted to the drive shafts 14 at both ends thereof.
8, the seedling case 20 revolves around the claw shaft 9, and the planting shaft 18 to which the seedling case 20 is attached is elastically connected to the planetary gear 15 via a spring 23, and The gear 15 meshes with the sun gear 12 via the intermediate gear 17,
The sun gear 12 and the planetary gear 15 have the same number of teeth, and the planetary gear 15 and the planting shaft 1 connected thereto are connected.
8 rotates around the drive shaft 14 in the direction opposite to the arrow A direction by the same rotation angle as the rotation angle of the rotation case 11 in accordance with the revolving rotation of the rotating case 11 in the arrow A direction. The planting case 20 makes a turning movement in the direction of arrow A in a state facing the seedling mounting table 3. During this turning movement, when the planting case 20 descends from the top on the side facing the seedling mounting table 3, After splitting one seedling from the seedling mat on the seedling mounting table 3 with the splitting nail 19 at the tip, the tip of the splitting nail 19 enters the field scene B near the lower lower limit, and then the field scene B It rises more. In this case, when the rotating case 11 is in a substantially horizontal state, in the seedling case 20 on the side facing the seedling mounting table 3, an arc-shaped outer peripheral portion 26a of the cam gear 24a of the intermediate shaft 16 is attached as shown in FIG. As shown in FIG. 7, one end of the tooth portion of the toothless stopper gear 25a of the planting shaft 18 abuts, and the rotation of the seedling case 20 in the direction opposite to the arrow A is stopped from this point, so that the seedling can be planted. The rotation of the case 20 in the direction opposite to the arrow A is delayed with respect to the revolution of the rotating case 11 in the direction of the arrow A (however, the planetary gear 15 rotates in the direction opposite to the arrow A, and Are separated from each other against the spring body 23, and the spring body 23 stores elastic force.) With the rotation of the rotating case 11 in the direction of the arrow A, the divided claws 19 of the seedling case 20 As shown in the figure, it is almost perpendicular to the field scene B. Is posture change entering the field plane B to. The split claw 1 in each seedling plant case 20
When 9 enters the field scene B,
The tip of the split claw 19 of each seedling plant case 20 and the pusher 28 for the split claw 19 are connected to the pusher 28.
When the axis 28a of the guide shaft 27 is located outside the outer peripheral surface of the rotating case 10, the outer peripheral surface of the rotating case 10 is further projected outward. As the rotary case 11 revolves in the direction of arrow A, the teeth of the large-diameter cam gear 24a on the intermediate shaft 16 become the teeth of the small-diameter toothless stopper gear 25a on the planting shaft 18. , The planting shaft 18 rotates at a higher speed than the intermediate shaft 16 based on the diameter ratio between the large-diameter cam gear 24a and the small-diameter toothless stopper gear 25a. Axis 18
The seedling case 20 to be mounted on the drive shaft 1
After the seedlings are planted in the field scene B, the split claws 19 move in the opposite direction to the traveling direction of the rice transplanter 1, that is, move away from the seedlings after planting. Goes out of B, rises, and seedlings 2
0 returns to the original posture, and the movement trajectory of the tip of the split claw 19 at this time becomes an elliptical closed loop curve D elongated in the vertical direction as shown by a two-dot chain line in FIG. A closed loop curve having the same shape as that of the crank type seedling plant described in JP-B-49-27762 can be obtained. That is, the two seedling plant cases 20 here
When the split claw 19 descends toward the field scene B while holding the seedling, the posture is changed vertically and enters the field scene B,
When the child leaves the field scene B after planting, it rises while escaping away from the seedling after planting, so that the planting of the seedling in the field scene B can be reliably performed under the correct posture. During the rotation of the rotating case 11 in the direction of the arrow A, each seedling case 20 rotates in the direction opposite to the arrow A with respect to the planting shaft 14 so that each seedling case 2 is rotated.
0, the lever 30 which comes into contact with the cam 33 on the planting shaft 14 is based on the shape of the cam 33 when the seedling case 20 comes to the lower lower limit where the tip of the split claw 19 enters the field scene B. 8, the pusher 28 at the lower end of the guide shaft 27 descends toward the tip of the split claw 19 as shown by a two-dot chain line in FIG.
The seedlings are planted so as to be pushed into the field scene B. When the pushing and planting is completed, the pushing tool 28 is almost at the same time as the split claw 19 comes out of the field scene B, and the pushing tool 28 is retreated from the tip of the split claw 19 to the original position. (The position indicated by the solid line in FIG. 8). It should be noted that the present invention is not limited to the case where two seedling cases 20 are mounted on one rotating case 11, but can be applied to the case where three or more seedling cases are mounted. As described above, according to the present invention, in the rotary type seedling planting apparatus, when the split nails enter the field scene, the split nails are attached to the split nails in each seedling planting case. By providing an extruding tool that pushes out the divided seedlings toward the tips of the dividing claws, it is possible to prevent the seedlings once planted in the field from being lifted up together with the dividing claws by the pushing out tool. . Incidentally, Japanese Patent Publication No. Sho 49-17807, which is a prior art of the present invention, discloses that a split claw in each seedling plant case is constituted by a pair of left and right split claw pieces. Although the seedlings are configured to be separated by opening in the direction away, the seedlings cannot be securely separated simply by opening both split nail pieces, and the seedlings adhere to one split nail piece with adhesive force. There is a risk of lifting together in the state where it was done. On the other hand, according to the present invention, the seedlings split by the split nails are pushed out toward the tip of the split nails by the pushing tool, so that the seedlings can be securely separated. Since the certainty of the seedlings can be greatly improved as compared with the prior art, and the seedling pushing operation of the pushing tool is performed by swinging the seedling case with respect to the rotating case. There is an effect that the operation of the pushing tool can be achieved by a simple and highly durable configuration. In addition to the above, according to the present invention, as described above, each seedling planting case is formed into a hollow body, and the split claw is provided at one end of the seedling planting case, while the pusher is provided with the seedling planting case. Since it is provided so as to project from the lower surface of the planting case, one end, the lower surface, and the upper surface of the seedling planting case can be independently separated without interfering with the installation of the split claw, the pushing tool, and the inspection lid. Therefore, the split claw, the pushing tool, and the inspection lid can be attached to the seedling planting case without interfering with each other. In addition, a planting shaft for attaching the seedling planting case to the rotating case and a drive shaft for attaching the cam for operating the pushing tool to the rotating case have the same axis. By configuring it as a heavy shaft, the structure is simpler than when these two shafts are arranged side by side,
Since the space can be significantly reduced, the split claw, the push-out tool and the inspection lid can be attached to the seedling planting case without interfering with each other. Under the form that the body can ensure the inspection and maintenance in the seedling planting case, it also has the effect of making the seedling planting case compact and, in turn, reducing the size and weight of the rotary seedling planting device.

[Brief description of the drawings] FIG. 1 is a side view of a rice transplanter. FIG. 2 is a plan view of the rice transplanter. FIG. 3 is a sectional view of a seedling plant. FIG. 4 is a sectional view taken along line IV-IV of FIG. 3; FIG. 5 is a sectional view taken along line VV of FIG. 3; FIG. 6 is a diagram showing an operation state of FIG. 5; FIG. 7 is a diagram showing a locus of movement of a seedling plant. FIG. 8 is an enlarged sectional view taken along line VIII-VIII of FIG. 3; FIG. 9 is a sectional view taken along line IX-IX of FIG. [Explanation of symbols] 1 rice transplanter 3 seedling stand 9 nail axis 10 Rotary type seedling plant 11 rotating cases 12 sun gear 14 Drive shaft 15 planetary gears 16 Intermediate shaft 17 Intermediate gear 18 Planting axis 19 split claws 20 seedling case 20a Main body case in seedling planting case 20b Lid for seedling planting case 21,22 nails 23 Spring body 24a cam gear 25a missing tooth type stopper gear 28 Extruder 27 Guide shaft of extrusion tool 30 levers 33 cam

Claims (1)

(57) [Claims] A rotating case, which is driven to rotate by power transmission from a power source, is provided on the machine near the seedling mounting table so as to rotate about a horizontal horizontal axis, and a plurality of plants are planted on the outer periphery of the rotating case. Shafts are respectively supported in parallel with the axis, and each planting shaft has a seedling planting case equipped with a split claw.
While the split claws are respectively mounted in a posture toward the seedling mounting table side, a mechanism is provided in the rotating case that transmits non-constant rotation to each of the planting shafts as the rotating case rotates. The seedling planting case is provided so as to pivot about the rotary case such that the tips of the split claws in the seedling planting case draw an elliptical closed loop motion trajectory that is long in the vertical direction. In the seedling planting device, each of the seedling planting cases is formed into a hollow body, and the split claw is provided at one end of the seedling planting case, while the seedlings split by the split claws are split into the seedling planting cases. An extruding tool adapted to be extruded toward the tip of the seedling planting case is provided so as to project from the lower surface of the seedling planting case, and further, in the seedling planting case, when the split nail enters the field scene, Swing for rotating case A cam configured to operate the push-out tool in the direction of pushing the push-out tool toward the tip of the split claw by pivoting is provided so as to be non-rotatably attached to the rotary case via the drive shaft, while the planting is performed. A seedling planting device in a rice transplanter, wherein the shaft and the drive shaft are configured as a double shaft having the same axis.