JPH0573365B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a seedling planting device for dividing seedlings one by one from a seedling pine on a seedling platform and then planting the seedlings in a field. This is related to the improvement of rotary seedling planting equipment.

[Conventional technology]

Conventionally, this type of seedling planting device has two types: a vertically swinging type and a rotary type. As shown in the figure, the base end of a planting pestle with a split claw at the tip is connected to the aircraft body via a fan link, while the midway part of the planting pestle is connected to a crank fixed to a claw shaft that is rotationally driven by an engine. The planting pestle is pivotally attached to the tip of the crank, and by the rotation of the crank, the planting pestle is swung up and down so that the tips of the split claws draw a long elliptical closed loop motion trajectory in the vertical direction. There were drawbacks such as extremely large vibrations due to the violent up-and-down movement of the pestle, making seedling planting unstable and slow planting speed.

On the other hand, the latter rotary type seedling planting device, as described in Japanese Patent Publication No. 17807/1983, uses a substantially horizontal rotating shaft that is rotationally driven by power transmission from a transmission case. A rotary body case is provided, a plurality of planting shafts are rotatably supported on the rotary body case on a circumference centered on the rotary shaft, and each planting shaft has a division extending toward the seedling stand. A planting pestle with claws is attached, and each of the split claw-equipped planting pestles is rotated once in a direction opposite to the rotation direction of the rotating body case during one rotation of the rotating body case by a gear train provided on the rotating body case. Because of this structure, it has the advantage that there is less vibration than the former vertically swinging type, and the planting speed can be improved.

[Problem to be solved by the invention]

However, in this rotary type seedling planting device, each planting pestle has a long elliptical closed loop movement locus in the vertical direction at the tip of the split claw of the planting pestle, as in the case of the vertically swinging type seedling planting device. It is necessary to swing and rotate the head so as to draw a picture, and the device of the above-mentioned Japanese Patent Publication No. 49-17807 is configured so that this swing and rotation is performed by a crank mechanism, so that the movement is slow. Not only was it not smooth and caused small vibrations, but it also had low durability.

Moreover, the one published in the above-mentioned Japanese Patent Publication No. 49-17807,
Since the rotating body case is configured to be supported only at the tip of its rotating shaft, if the rotating body case is not supported enough and the rotating body case is rotated at high speed, the rotating body case may become sideways. The problem was that it swayed and its durability was low.

The present invention aims to solve the problems of the conventional rotary-type seedling planting device, and to improve the attachment and removal performance of the seedling planting device without increasing the size of the seedling planting device. It is something.

[Means to solve the problem]

In order to achieve this object, the present invention has a rotating body case attached to a substantially horizontal rotating shaft that is rotationally driven by power transmission from a transmission case, and a rotating body case that is attached to the rotating body case to form a circle centered on the rotating shaft. A plurality of planting shafts are rotatably supported on the circumference, and a planting pestle equipped with a split claw extending toward the seedling stand is attached to each of the planting shafts, and a planting pestle is provided at the center of the rotating body case. A gear train is provided between the non-rotating sun gear and the planting shaft, and the gear train is configured to transmit inconstant rotation to each of the planting shafts as the rotating body case rotates; A case is rotatably supported via a bearing portion to a fixed member attached to the transmission case so as to fit over the rotating shaft, and the sun gear is supported by the bearing portion with respect to the fixed member. The rotating shaft is configured to be detachably connected in a non-rotating state via a meshing part that can mesh in the axial direction of the rotating shaft at the inner diameter part of the shaft.

[Action/effect of the invention]

The present invention imparts oscillating rotation to each planting punch by configuring the gear train provided in the rotating body case as a gear train that transmits inconstant rotation, and thereby,
Since the tips of the split claws of each planting pestle are designed to draw a vertically long elliptical closed loop motion trajectory, the movement of the split claws of each planting pestle is smooth, allowing for smooth movement of the split claws in relation to the field situation. Not only can the planting of seedlings be stabilized, but their durability can also be greatly improved.

Furthermore, by supporting the rotating body case via the bearing section with respect to the fixed member attached to the transmission case, the rotating body can be stably supported, and lateral vibrations can occur in the rotating body case. Since it is possible to reliably reduce this, the stability and durability of seedling planting can be further improved.

Furthermore, the sun gear in the gear train is removably connected to the fixed member in a non-rotating state via a meshing part that can mesh in the axial direction of the rotating shaft, so that the sun gear and the sun gear mesh with each other. Each gear,
The rotating body case can be removed from the transmission case while still attached to the rotating body case, or can be attached to the transmission case, and the sun gear is rotated each time it is attached or removed. Since there is no need to attach or remove the seedling transplanter from the body case, the entire seedling planting device can be easily attached or removed.

In this case, by locating the meshing part between the sun gear and the fixed member on the inner diameter part of the bearing part, the meshing part and the bearing part can overlap in the axial direction of the rotating shaft. Therefore, the provision of the engaging portion does not lead to an increase in the size of the seedling planting device. In other words, the installation and removal performance of the seedling planting device can be reliably improved without causing an increase in the size of the seedling planting device. It can be improved.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 indicates a transmission case in the body of the rice transplanter, and on the side of the transmission case 1,
A boss body 2 is protruded horizontally and substantially parallel to the seedling stand 10, and inside the boss body 2 is a rotary drive unit that is rotatably driven by power transmission from an engine (not shown) mounted on the body of the rice transplanter. A rotating shaft 3 is inserted into the rotating shaft 3, and an oval-shaped rotating body case 4 is removably attached to the protruding end of the rotating shaft 3 from the boss body 2. It is configured to rotate in the right direction as shown by arrow A.

Furthermore, this rotating body case is formed into a hollow shape with two halves of cases 4a and 4b, and a sun gear 5 is disposed at the center of the interior thereof.
is fixed to the transmission case 1 in a non-rotatable manner. Its structure includes a fixing member 6 that fits over the rotating shaft 3 and is attached to the transmission case 1 so as to be able to adjust the rotational phase, and the sun gear 5.
This is achieved by meshing at a meshing portion 7 such as a spline.

Further, the fixed member 6 is provided with a bearing such as a bearing on the outer diameter part of the meshing part 7, and the rotating body case 4 is rotatably supported by this bearing.

At both left and right ends of the outer case 4b of the rotating body 4, there are provided at positions at equal distances L from the rotating shaft 3.
A boss part 8 is integrally protruded parallel to the rotating shaft 3, and a hollow planting pestle 11 is provided on the outer periphery of the boss part 8 with a dividing claw 9 extending toward the seedling platform 10. It is rotatably fitted and mounted at its base.

The planting shaft 12, which is rotatably inserted into the inner diameter of the boss portion 8, has one end fixed to the side plate 13,
While the other end of the planting shaft 12 faces the hollow part of the rotating body 4, the side plate 13 of the planting shaft 12 is fixed to the outer plate 14 of the planting punch 11 with bolts 15.

Inside the rotating body 4, there is a rotating shaft 3 and each planting shaft 1.
2, an intermediate shaft 16 is rotatably supported parallel to both shafts, and on each intermediate shaft 16 is an intermediate gear that meshes with the sun gear 5 and has the same number of teeth as the sun gear 5. 17 is rotatably provided, and a planetary gear 18 is fitted on the planting shaft 12, which is always in mesh with the intermediate gear 17 on the intermediate shaft 16, so that the planting shaft 12 is rotated by one rotation of the rotating body 4. It is configured to rotate once in the opposite direction to the rotational direction of the rotating body 4.

At this time, the sun gear 5, the intermediate gear 17, and the planetary gear 18 are arranged so that the centers O, O', O'' of each of these gears 5, 17, 18 are appropriately sized e from the center of rotation of each shaft 3, 16, 12. A non-uniform gear train is constructed by using eccentric gears that are eccentric.

One end of the boss portion 8 is made to face inside each of the hollow planting punches 11, and a mating pawl 19 is formed at the one end, and a cam 20 that meshes and engages with the mating pawl 19 is formed at the one end.
is rotatably fitted onto the planting shaft 12 to serve as a power transmission section for driving the left and right pinching of the split claws 9 of the planting punch 11 and for driving the seedling pusher.

In the embodiment shown in FIGS. 3 and 5, the pair of left and right dividing claws 9 of each planting pestle 11 can be opened and closed left and right, and when dividing the seedling pine on the seedling stand 10, the left and right distance between the lower ends of the dividing claws 9 is When planting in the field, that is, near the lower descending end of the dividing nail 9, it is forcibly opened so that the left and right distance between the lower ends of the dividing nail 9 becomes wider. An opening/closing shaft 22 to which a member 21 is attached, in which one claw 9a of the claws 9 is removably bolted to the outer surface of the planting pestle 11, and the other claw 9b is removably fixed.
The projection 24 is rotatably supported on the planting punch 11 substantially parallel to the one claw 9a, and protrudes from the tip of a lever 23 attached to the opening/closing shaft 22 in the hollow of the planting punch 11. The opening/closing shaft 22 is forcibly rotated only when the outer circumferential surface of the cam 20 is brought into contact with the outer circumferential surface of the cam 20 by the pressure of a spring 25, and the outer circumferential surface of the cam 20 is near its lower limit. The lower end of the other claw 9b is separated from the lower end of the one claw 9a.

In this configuration, when the rotating body 4 revolves around the rotating shaft 3 in the right direction of the arrow A, the transmission case 1
As the rotating body 4 revolves, the intermediate gear 17 meshing with the sun gear 5, which cannot rotate, rotates in the right direction of arrow B by the same rotation angle as the rotation angle of the revolution. The planting shaft 12 interlocked via the planetary gear 18 rotates in the direction of arrow C, that is, in the opposite direction to the revolution direction of the rotating body 4 due to the rotation of the intermediate gear 17, so the planting punch 11 attached to this planting shaft 12 is As shown in FIG. 1, the dividing claws 9 rotate around the rotating shaft 3 while remaining in a posture facing the seedling stand 10.
During this turning movement, when descending from top to bottom on the side facing the seedling platform 10, the tip of the dividing claw 9 divides only one seedling from the seedling pine on the seedling platform 10, and then They are planted in the field area 26 near the lower limit of descent, and then rise above the field area 26.

Since each planting punch 11 is rotatably fitted into the boss portion 8 protruding from the rotary body 4, while the rotary body 4 revolves in the right direction of the arrow A, each planting punch 11 By rotating in the left direction of arrow C with respect to each boss portion 8, that is, in the opposite direction to the revolution direction of the rotating body 4, the lever 23 that comes into contact with the cam 20 that engages with the boss portion 8 in each planting punch 11 When the tip of the dividing claw 9 enters the field area 26 at the lower limit of the lever 11, it rotates upward by the force of the spring 25 based on the shape of the cam 20, so the opening/closing shaft 22 to which this lever 23 is attached is The lower end of the other claw 9b provided on the member 21 of the opening/closing shaft 22 is separated from the lower end of the one claw 9a by rotating the opening/closing shaft 22 by an appropriate angle around its axis to ensure that the seedling is planted in the field soil. I can do it.

In addition, the gears 17 and 18 having the same number of teeth that interlock and connect the intermediate shaft 16 and the planting shaft 12 are set so that the center O of each of these gears is eccentric by an appropriate dimension e from the center of rotation of each of the shafts 16 and 12. By configuring it as an eccentric gear, the leftward rotation of the planting shaft 12 accompanying the rightward revolution of the rotating body 4 is caused by the diameter of the eccentric interlocking gears 17 and 18 during one rotation. Since the rotation speed of the rotating body 4 is increased or decreased depending on the rotation speed of the rotating body 4, the planting axis 1 is rotated with respect to the revolution of the rotating body 4.
The time when the rotation of the planting shaft 12 to the left becomes slow is the time when the planting pestle 11 descends to approach the field scene 26, and the time when the rotation of the planting shaft 12 to the left becomes fast is the upper limit of the rise of the planting pestle 11. Since each planting pestle 11 is set to correspond to the period of rising toward the field, when descending toward the field scene 26, each planting pestle 11 rotates later than the revolution of the rotating body 4 in the left direction. When approaching the upper limit of ascent, the rotating body 4 moves further to the left than the revolution and rotates on its own to change its posture upward, so the movement of the tip of the split claw 9 of each planting punch 11 The closed loop of the trajectory is a vertically elongated elliptical closed loop curve 2, as shown by the two-dot chain line in Figure 1.
It becomes 7.

In another embodiment, each of the plurality of planting pestles in this seedling planting device is equipped with a pushing tool for pushing the seedlings divided by the dividing claws of the planting pestle into the field. In this case, the cam 20 that engages with the boss portion 8 of the rotating body 4 can be used to vertically drive the guide shaft for vertically moving the extruder along the dividing claw.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a front view, FIG. 2 is a plan view, FIG. 3 is an enlarged cross-sectional view of FIG. 2, and FIG. 4 is a cross-sectional view of FIG. 3. ,
FIG. 5 is an enlarged sectional view of FIG. DESCRIPTION OF SYMBOLS 1... Transmission case, 3... Rotating shaft, 4... Rotating body, 5... Sun gear, 6... Fixed member, 7... Meshing part, 8... Boss part, 12... Planting shaft, 11...
...Planting pestle, 9...Divided claw, 10...Seedling stand, 1
6... Intermediate shaft, 17... Intermediate gear, 18... Planetary gear.

Claims (1)

[Claims] 1. A rotating body case is attached to a substantially horizontal rotating shaft that is rotationally driven by power transmission from a transmission case, and a plurality of planting shafts are rotated on the circumference around the rotating shaft on the rotating body case. Freely pivoted,
A planting pestle equipped with a split claw extending toward the seedling stand is attached to each of the planting shafts, while a non-rotating sun gear provided at the center of the rotary body case is provided with a planting pestle between the planting shaft and the non-rotating sun gear. A gear train is provided to transmit inconstant rotation to each of the planting shafts as the rotating body case rotates, and the rotating body case is fitted to the transmission case on the rotating shafts. The sun gear is rotatably supported via a bearing part with respect to a fixed member attached to the fixed member, and the sun gear is meshable with the fixed member in the axial direction of the rotating shaft at an inner diameter part of the bearing part. A seedling planting device for a rice transplanter, characterized in that the device is detachably connected in a non-rotating state via an engaging part.