JPH08252012A - Seedling planting apparatus of rice transplanter - Google Patents

Abstract

PURPOSE: To improve seedling planting performance and durability of a seedling transplanting apparatus and reduce the occurrence of incapability of seedling planting by twining of straw waste, in a rotary type seedling transplanter in which a rotator case is attached to a rotating shaft protruded from a transmission case and plural planting levers are attached to the rotator case. CONSTITUTION: A gear row for transmitting unequal rotation is provided between a solar gear 5 in a rotator case 4 and a planting shaft 12 to which a planting lever 11 is attached and a fixed member 6 attached to a transmission case 1 so as to be not rotatable is provided so as to fit on a rotation shaft 3 and the fixed member 6 is engaged with the solar gear 5 in a unrotatable state in the rotator case 4.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a rice transplanter,
The present invention relates to an improvement of a rotary type seedling planting device among seedling planting devices for splitting seedlings from a seedling mat on a seedling table and planting them in a field.

[0002]

2. Description of the Related Art Conventionally, seedling planting devices of this type include a vertical swing type and a rotary type, and the former vertical swing type is disclosed in, for example, Japanese Patent Publication No. 49-27662. , The base end of a planting rod having a split claw at the tip is connected to the fuselage side via a fan link, while the middle part of the planting rod is rotated by an engine. It is pivotally attached to the tip of a crank that is fixed to, and the planting rod is swung up and down by the rotation of the crank so that the tip of the split claw draws a movement locus of an elliptical closed loop that is long in the vertical direction. The plant had the drawbacks that the planting rod was unstable and the planting speed was slow because the vibration of the planting plant was extremely large due to the vigorous vertical swing of the planting rod.

On the other hand, the latter rotary type seedling planting apparatus is, as described in Japanese Patent Publication No. Sho 49-17807, a substantially horizontal horizontal rotation shaft which is rotationally driven by power transmission from a transmission case. A rotating body case is provided in the rotating body case, and on the circumference of the rotating body centered around the rotation axis,
A plurality of planting shafts are rotatably supported, and each planting shaft is
A planting rod having a split claw extending toward the seedling mounting table is attached, and the planting rod with each split claw is rotated by a gear train provided in the rotary case to rotate in one rotation of the rotary case. Since it is configured to rotate once in the opposite direction, it has the advantages of less vibration and improved planting speed than the former vertical swing type.

[0004]

However, in this rotary seedling plant, each of the planting rods is attached to the tip of a split claw of the planting rod in the same vertical direction as in the case of the vertical swinging seedling plant. It is necessary to swing the head so as to draw a long elliptical closed-loop motion trajectory. Japanese Patent Publication No. Sho 49-17807 discloses a structure in which the swing is performed by a crank mechanism. The movement is not smooth, and not only does fine vibration occur,
It had low durability.

Further, in the Japanese Patent Publication No. 49-17807, the boss portion integrally provided on the sun gear is projected from the rotary case toward the transmission case, and the boss portion is attached to the transmission case. Since the engaging portion of the boss integral with the sun gear is located on the outer side of the rotating body case, the boss portion integral with the sun gear is located outside the rotating body case. In addition, there is a problem that straw waste, grass and the like are likely to be directly wrapped around, which may cause the engagement portion to be disengaged, resulting in inability to plant seedlings in a field.

[0006] The present invention has a technical object to solve all the problems of the conventional rotary type seedling planting apparatus at once.

[0007]

SUMMARY OF THE INVENTION In order to achieve this technical object, the present invention provides a method of mounting a rotator case on a substantially horizontal rotation shaft which is driven to rotate by power transmission from a transmission case, and attaches the rotator case to the rotator case. A plurality of planting shafts are rotatably supported on a circumference around the rotation shaft, and a planting rod having a split claw extending toward a seedling mounting table is attached to each planting shaft. In the body case, between the sun gear rotatably fitted on the rotating shaft and the planting shaft, the rotation of the rotating body case causes unequal-speed rotation with respect to each of the planting shafts. And a gear train that conveys
Further, a fixing member non-rotatably attached to the transmission case is provided so as to be fitted on the rotating shaft, and the fixing member is engaged with the sun gear in a non-rotating state in the rotating body case. Combine. "."

[0008]

According to the present invention, the gear train provided on the rotating body case is constituted by a gear train transmitting unequal speed rotation, whereby each planting rod is given a swinging rotation, thereby providing At the tip of the split claw in the planting rod, the movement trajectory of the elliptical closed loop shape which is long in the vertical direction is drawn, so that the movement of the split claw in each planting rod becomes smooth, and Planting can be stabilized and durability can be greatly improved.

Moreover, since the rotating body case is supported by the fixing member attached to the transmission case via the bearing portion, the rotating body can be stably supported, and the lateral swinging of the rotating body case occurs. Since the occurrence can be reliably reduced, the stability and durability of seedling planting can be further improved. Furthermore, a fixing member that is non-rotatably attached to the transmission case is provided so as to be fitted on the rotating shaft, and the fixing member is in a non-rotating state in the rotating body case with respect to the sun gear of the gear train. By engaging the sun gear with the non-rotatably engaging portion of the sun gear with respect to the transmission case, it is possible to avoid directly wrapping straw debris, grass, etc. It is possible to surely reduce the risk that the tape will come off due to wrapping.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a transmission case of a rice transplanter according to an embodiment of the present invention; FIG. The boss 2 protrudes horizontally and horizontally and substantially in parallel with the seedling mounting table 10, and has a rotating shaft 3, which is rotatably driven by power transmission from an engine (not shown) mounted on the body of the rice transplanter. Is inserted into a protruding end of the rotating shaft 3 from the boss body 2.
Is detachably mounted, and the rotating body case 4
Are configured to rotate to the right as indicated by arrow A.

Further, the rotating body case 4 is formed in a hollow shape with two cases 4a and 4b, and a sun gear 5 is rotatably fitted on the rotating shaft 3 at the center of the inside thereof. The sun gear 5 is non-rotatably locked to the transmission case 1. Its structure is
The fixing member 6 mounted on the transmission case 1 so as to adjust the rotational phase and the sun gear 5 are not engaged with each other by an engaging portion 7 configured to be meshable in the axial direction of the rotating shaft 3 like a spline. This is done by engaging in a rotating state.

The fixing member 6 has an engaging portion 7
A bearing 27 such as a bearing is provided at an outer diameter portion of the rotary member, and the rotating case 4 is rotatably supported by the bearing 27. On the other hand, between the fixed member 6 and the rotating case 4 By providing a filling member 26 for filling a gap therebetween at a portion outside the bearing portion 27,
It is configured such that muddy water or the like can be prevented from entering the engaging portion 7 and the bearing portion 27.

At both left and right ends of the outer case 4b of the rotator case 4, bosses 8 are integrally protruded in parallel with the rotary shaft 3 at positions where the distance (L) from the rotary shaft 3 is equal. A hollow planting rod 1 provided with a split claw 9 extending toward the seedling mounting table 10 on the outer periphery of the portion 8.
1 is rotatably fitted and mounted at its base. A planting shaft 12 rotatably fitted into the inner diameter of the boss portion 8
Has one end fixed to the side plate 13 and the other end of the planting shaft 12 faces the hollow portion of the rotating body case 4, while the side plate 13 of the planting shaft 12 is connected to the outer plate 1 of the planting rod 11.
4 is fixed to the bolt 15.

In the rotating body case 4, an intermediate shaft 16 is rotatably supported at a position intermediate between the rotating shaft 3 and each planting shaft 12 in parallel with both shafts. , An intermediate gear 17 meshing with the sun gear 5 and having the same number of teeth as the sun gear 5
Is rotatably provided, a planetary gear 18 that is constantly meshed with an intermediate gear 17 on the intermediate shaft 16 is fitted on the planting shaft 12, and the planting shaft 12 is rotated by one rotation of the rotating body case 4. It is configured to rotate once in a direction opposite to the rotating direction of the rotating body case 4.

At this time, the center (O), (O '), and (O ") of the sun gear 5, the intermediate gear 17, and the planetary gear 18 are respectively set to the respective axes 3, 16 of the gears 5, 17, and 18. ,
An eccentric gear train is formed by eccentricizing the rotation center 12 by an appropriate dimension (e) to form a non-constant speed gear train. Then, one end of the boss portion 8 is exposed in each of the hollow planting rods 11, and a meshing pawl 19 is formed at the one end, and a cam 20 meshingly engaged with this is freely rotatable on the planting shaft 12. It is configured to be a power transmission part for driving the split claws 9 in the planting rod 11 between the left and right sides and driving the seedling pushing tool.

In the embodiment shown in FIGS. 3 and 5, the pair of left and right split claws 9 of each planting rod 11 can be opened and closed left and right.
The bottom end has a narrow left-right space and is forcibly opened when planted in a field, that is, in the vicinity of the lower end of the split claw 9 so that the left-right space of the bottom end of the split claw 9 becomes wider.
One of the pair of left and right split claws 9 is detachably bolted to the outer surface of the planting rod 11 with one of the claws 9a, and a member 21 is detachably fixed to the other claw 9b.
Reference numeral 2 denotes a planting rod 11 which is rotatably supported in a substantially parallel manner with the one claw 9a, and a projection 24 protruding from the tip of a lever 23 attached to the opening / closing shaft 22 in the hollow of the planting rod 11.
Is brought into contact with the outer peripheral surface of the cam 20 by pressing the spring 25, and the outer peripheral surface of the cam 20 is forced to force the opening / closing shaft 22 only when each of the planting rods 11 is near the lower limit of its descending. The lower end of the other claw 9b is rotated and the lower end of the other claw 9b is rotated.
It is configured to be separated from the lower end of a.

In this configuration, when the rotating body case 4 revolves rightward in the direction of the arrow A by the rotating shaft 3, the intermediate gear 17 meshing with the sun gear 5 that cannot rotate with respect to the transmission case 1 is rotated. With the revolution of, it rotates rightward by the arrow B by the same rotation angle as the rotation angle of the revolution,
The planting shaft 12 interlocked with the intermediate gear 17 via the planetary gear 18 rotates in the direction of arrow C by the rotation of the intermediate gear 17, that is, in the direction opposite to the revolving direction of the rotating body case 4. The planting rod 11 makes a revolving motion about the rotating shaft 3 with the divided claws 9 facing the seedling table 10 as shown in FIG. 1, and during this revolving motion, When the side facing the seedling mounting table 10 is lowered from the top to the bottom, after dividing the seedling by one plant from the seedling mat on the seedling mounting table 10 at the tip of the split claw 9,
The plant is planted in the field scene 26 near the lower lower limit, and then rises from the field scene 26.

Since each planting rod 11 is rotatably fitted to the boss 8 protruding from the rotating body 4, each planting rod 11 is rotated while the rotating body case 4 revolves rightward as indicated by the arrow A. When the rod 11 rotates in the left direction of the arrow C with respect to each of the bosses 8, that is, in the direction opposite to the revolving direction of the rotating body case 4, the cam 2 that meshes with the boss 8 in each planted rod 11.
The lever 23 that contacts 0 rotates in the upward direction by the force of the spring 25 based on the shape of the cam 20 when the tip of the split claw 9 enters the field scene 26 at the lower limit of lowering of the planting rod 11. Opening / closing shaft 2 to which this lever 23 is attached
2 rotates around its axis by an appropriate angle,
The lower end of the other claw 9b provided on the member 21 is separated from the lower end of the one claw 9a, so that the seedlings can be reliably planted in the field soil.

Gears 17 and 18 having the same number of teeth for interlockingly connecting the intermediate shaft 16 and the planting shaft 12 are appropriately dimensioned with respect to the center (O) of each gear from the rotation center of each shaft 16 and 12. (E), the rotation of the planting shaft 12 to the left along with the revolving of the rotating body case 4 in the right direction causes the eccentric gears to be eccentric only during one rotation. Due to the difference between the diameters of the gears 17 and 18, the swinging rotation is performed so as to increase or decrease with respect to the rotation speed of the rotating body 4. The time when the rotation of the planting shaft 11 to the left becomes slower is when the planting rod 11 descends so as to approach the field scene 26, and the time when the rotation of the planting shaft 12 is faster to the left is the upper limit of the rising of the planting rod 11. It corresponds to the time of rising to approach each When the planting rod 11 descends so as to approach the field scene 26, the planting rod 11 rotates to the left later than the revolution of the rotating body case 4 to change the posture downward, and approaches the upper limit. At this time, since the rotating body case 4 advances to the left more than the revolution and rotates on its own to change the attitude upward, the closed loop of the movement trajectory of the tip of the split claw 9 of each planting rod 11 has two points in FIG. An elliptical closed loop curve 28 which is elongated in the vertical direction as shown by the chain line
It becomes.

In another embodiment, an extruding tool for pushing a seedling divided by a dividing claw of the planting rod into a field scene is attached to each of the plurality of planting rods in the seedling planting apparatus. In this case, the cam 20 that meshes with the boss 8 of the rotating body case 4 can be used to vertically move the guide shaft for vertically moving the pusher along the split claw.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment according to the present invention.

FIG. 2 is a plan view of FIG.

3 is an enlarged sectional view taken along line III-III of FIG.

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;

5 is a cross-sectional view taken along line VV of FIG.

[Explanation of symbols]

 1 Transmission Case 3 Rotating Shaft 4 Rotating Body Case 5 Sun Gear 6 Fixing Member 7 Engagement Part 8 Boss Section 12 Planting Shaft 11 Planting Rod 9 Dividing Claw 10 Seedling Platform 16 Intermediate Shaft 17 Intermediate Gear 18 Planetary Gear 26 Packing Member 27 Bearing Department

Claims (1)

[Claims] 1. A rotary body case is attached to a substantially horizontal lateral rotary shaft that is rotationally driven by power transmission from a power transmission case, and a plurality of planting shafts are attached to the rotary body case on a circumference centered on the rotary shaft. Rotatably rotatably supporting the planting rods having split claws extending toward the seedling mounting table on the planting shafts, while rotatably fitted to the rotating shafts in the rotating body case. Between the sun gear provided and the planting shaft, a gear train configured to transmit a non-constant speed rotation to each planting shaft with the rotation of the rotating body case,
Further, a fixing member non-rotatably attached to the transmission case is provided so as to be fitted on the rotating shaft, and the fixing member is engaged with the sun gear in a non-rotating state in the rotating body case. A seedling planting device for a rice transplanter, comprising: