JP3294134B2 - Seedling planting mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seedling planting mechanism mounted on a rice transplanter or the like. More specifically, the present invention relates to a planting transmission case which is rotatably supported around a first axis. A sun gear fixedly and non-rotatably fixed to the planting transmission case, rotatably supporting a pawl support to which the planting claws are attached around a second axis parallel to the first axis; A planetary gear fixed to a support shaft that pivotally supports the claw support while rotating integrally therewith, and rotates around a third axis parallel to the first axis while meshing with the sun gear; A first gear, a second gear that rotates about a fourth axis that is eccentric to the third axis in a state of meshing with the planetary gear, and an unequal number of the first gear and the second gear. By providing an eccentric crank type rotation transmission mechanism that is linked to speed,
Along with the rotation of the rotating case, relative tipping means for relatively rotating the nail support and the rotating case is configured such that the tip of the seedling-claw draws a vertically long elliptical trajectory; A first support shaft that is supported at one end by the case, and rotatably supports the first gear at the other end, and is supported at one end by a rotating case; and The present invention relates to a gear provided with a gear support shaft including a second support shaft portion rotatably supporting a second gear and a connection shaft portion connecting the support shaft portions with eccentricity.

[0002]

2. Description of the Related Art In a seedling planting mechanism of this kind, a gear shaft for rotatably supporting a first gear and a second gear is supported by a rotating case at both ends, so that the gear shaft is firmly supported. There are advantages that can be done.

[0003]

By the way, this kind of seedling planting mechanism, that is, a gear support shaft is fixedly supported on a rotating case, and a first support shaft portion and a second support shaft portion of the gear support shaft. The first gear and the second gear are rotatably fitted and supported, respectively, so that the first gear and the second gear are rotatable around the third axis and the fourth axis on the rotating case. Supporting mechanisms are in the early stages of development and have numerous improvements.

[0004] One of them is facilitation of disassembly.
That is, in this kind of seedling planting mechanism, in order to securely and strongly fix and support the gear support shaft without rattling on the rotating case, the both ends of the gear support shaft are inserted and supported in the support shaft mounting holes of the rotating case. In this case, the gear support shaft and the support shaft assembling hole are formed such that the peripheral surface of the hole and the peripheral surfaces of both ends are in close contact with each other. As a result, when the end of the gear shaft is inserted into the shaft assembling hole, the air in the hole hardly escapes from between the end of the gear shaft and the hole due to the insertion, and is compressed. As a result, the insertion operability is deteriorated, and the gear support shaft tends to rise, making it difficult to reliably insert. On the other hand, at the time of disassembly for maintenance etc., it is difficult for air to enter the hole through the gap between the end of the gear shaft and the hole as the gear shaft is pulled out from the shaft mounting hole, which becomes a resistance. Drawability was poor.

An object of the present invention is to make it possible to easily insert and remove a gear shaft into and from a shaft mounting hole.

[0006]

The features, functions and effects of the first aspect of the present invention are as follows.

[Features] A claw support having a seedling mounting claw attached to a rotating case rotatably supported on a planting transmission case around a first shaft center is parallel to the first shaft center. A sun gear rotatably supported around the two shaft cores and non-rotatably fixed to the planting transmission case, fixed to a support shaft that pivotally supports the claw support in a state of being integrally rotated. A planetary gear, a first gear rotating around a third axis parallel to the first axis in a state of meshing with the sun gear, and a third axis in a state of meshing with the planetary gear. A second gear that rotates about a centered fourth axis, and an eccentric crank-type rotation transmission mechanism that interlocks the first gear and the second gear at unequal speeds to rotate the rotation case. Accordingly, a phase in which the claw support and the rotating case are driven to rotate relative to each other such that the tip of the seedling-claw draws a vertically long elliptical locus. A first supporting shaft portion that constitutes a rotating means, is supported at one end by the rotating case, and rotatably supports the first gear at the other end, and is supported at one end by the rotating case. And, a gear support shaft including a second support shaft portion rotatably supporting the second gear at the other end side, and a connection shaft portion eccentrically connecting the support shaft portions to each other is provided. A seedling planting mechanism, wherein the rotation between the first spindle and the spindle mounting hole of the rotating case for inserting and supporting the same, and the second spindle and the rotation for inserting and supporting the same. The point is that a flow path for venting air is formed between the support shaft mounting hole of the case and the support shaft mounting hole over the entire length of the support shaft mounting hole.

According to the first aspect of the present invention, a groove is formed on the outer peripheral surface of the first spindle portion or the second spindle portion or on the inner peripheral surface of the spindle mounting hole. Since a flow path extending over the entire length of the spindle mounting hole is formed between the one spindle portion and the spindle mounting hole and between the second spindle portion and the spindle mounting hole, When inserting and supporting the first spindle portion and the second spindle portion in the spindle mounting hole, the air in the spindle mounting hole smoothly flows out to the outside through the flow path with the insertion. Therefore, while the air compression, which causes insertion resistance, can be prevented, when the first spindle portion and the second spindle portion are extracted from the spindle mounting hole, the air flows into the spindle mounting hole with the extraction. Since the outside air smoothly flows in through the passage, air suction, which serves as extraction resistance, can be prevented. In addition, when lubricating oil (including grease) is injected into the flow path, it is possible to spread the injected lubricating oil over the entire circumference by capillary action in the assembled state.

[Effects] Therefore, according to the first aspect of the present invention, the end of the gear support shaft is inserted into the support shaft assembling hole, and the end of the gear support shaft is inserted from the support shaft assembling hole. Extraction and disassembly can be performed with good operability. In particular,
If the lubricating oil injected into the flow path has spread all around,
Further, the gear shaft can be easily extracted and rust can be prevented.

According to the second aspect of the present invention, the features, actions,
The effect is as follows.

[Features] In the features of the first invention,
The first axis, the second axis, the third axis, and the fourth axis are arranged on the same plane, and among the positions around the third axis and the fourth axis, The point is that the flow path is formed at a position other than a position orthogonal to the same plane and intersecting a plane passing through the third axis and the fourth axis.

According to the second aspect of the present invention, when the first axis, the second axis, the third axis, and the fourth axis are arranged on the same plane, Note that the direction of action of the bending force acting on the gear support shaft associated with the meshing interlock between the gear and the sun gear and the meshing interlock between the second gear and the planetary gear is a direction orthogonal to the same plane. Among the positions around the third axis and the fourth axis, positions other than the position orthogonal to the same plane and intersecting with a plane passing through the third axis and the fourth axis. By forming the flow path, so that the groove forming the flow path is orthogonal to the same plane, and is not formed at a position that intersects a plane passing through the third axis and the fourth axis. , Because it is designed to ensure surface contact at that position, Eliminating the reduction of the product, or can be reduced.

[Effects] Therefore, according to the second aspect of the invention, it is possible to improve the operability of disassembly and disassembly of the gear support shaft by forming the flow path, while firmly supporting the intended gear support shaft. Is now available.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a seedling planting apparatus A comprises a square pipe-shaped left-right main frame 1, a feed case 2 connected to a substantially center portion of the main frame 1 in the left-right direction, and A frame body including a plurality of planting transmission cases 3 connected to the main frame 1 in a state where they are arranged at appropriate intervals in the left-right direction is provided, and a seedling mounting table 4 is provided at a front portion of the frame body with a constant stroke in the left-right direction. A plurality of seedling planting mechanisms 5 are provided on both left and right sides of the rear of each of the plurality of planting transmission cases 3 so as to be freely reciprocated. Float 6 is attached. The seedling planting apparatus A is operated so as to be lifted and lowered via a link mechanism (not shown) at the rear of a traveling machine (not shown), and is transmitted from the self-propelled machine to the feed case 2. To form a riding type rice transplanter, and the ground float 6 touches the mud surface of the field to support the weight of the machine and level the mud surface with the running of the machine. The planting mechanism 5 cuts out a part of the mat seedling placed on the seedling mounting table 4 and plant it at the leveling place by the ground float 6.

Each of the plurality of seedling planting mechanisms 5
As shown in FIGS. 1 and 2, a rotating case 10 is attached to a rear side portion of the planting transmission case 3 so as to be rotatable around a first axis X <b> 1 in a posture along the left-right direction.
Of the two ends opposite to each other with the first axis X1 sandwiched among the locations equidistant from the first axis X1,
A nail support case 13 as a nail support provided with a seedling mounting nail 12 and a seedling pushing tool 15 is rotatably mounted around a second axis X2 parallel to the first axis X1.
0 is provided between each claw supporting case 13 and the planting transmission case 3 to relatively rotate the claw supporting case 13 and the rotating case 10 as the 0 is driven to rotate. A seedling pushing-out operation mechanism E for operating the seedling pushing-out tool 15 as the 10 is driven to rotate is provided in each claw support case 13.

The rotary case 10 is configured so that it can be divided into two half-divided case parts 10A and 10B at a division plane Y. Specifically, two half-split case parts 1
0A and 10B are fastened and connected by connecting bolts. The rotating case 10 is configured such that the central part in the longitudinal direction of one half-split case portion 10A is attached to a boss 3a located concentrically with the first shaft center X1 at the rear of the planting transmission case 3. The bearing 9 is rotatably mounted via the bearing 7, and the bearing 9 a positioned at the center in the longitudinal direction of the other half case portion 10 </ b> B is passed through the boss portion 3 a to the planting transmission case 3. By being connected to the end of the output shaft 8 rotatably supported via a taper pin 11, the output shaft 8 is rotatably supported around the first axis X1 by the planting transmission case 3, and Are configured to be rotationally driven in the illustrated direction F with the driving rotation of the output shaft 8. The output shaft 8
Is rotationally driven by rotational power transmitted from the feed case 2 via a transmission mechanism (not shown).

The claw support case 13 is provided with a rotating case 10.
A support shaft 14 rotatably supported around the second axis X2 via a pair of bearings 24 and 25 at end portions of the support shaft 14.
Of these, the end protruding from the rotating case 10 to the outside is connected in a detented state. More specifically, the flange 27 integrally formed on the claw support case 13 is fixed to the support shaft 14 with the end of the support shaft 14 inserted into a through hole 29 formed in the flange 27. 26
To the support shaft 14 by bolting
And rotate together. Thereby, the claw support case 13 is rotatably supported by the rotating case 10 around the second axis X2.

Each of the pair of relative rotation means S includes:
As shown in FIGS. 2 and 3, a sun gear 23 externally rotatably fitted to the output shaft 8, a planetary gear 30 attached to the support shaft 14, and a first gear that meshes with and works with the sun gear 23. 31, a second gear 32 meshed with and linked to the planetary gear 30, and a crank type rotation transmission mechanism D formed between the first gear 31 and the second gear 32. .

The sun gear 23 is non-rotatably fixed to the planting transmission case 3 with its axis aligned with the first axis X1. The fixing means is a sun gear 23
Meshing claw portion B formed on the boss portion of
This is a means for lockingly engaging a mating claw formed at the end of the boss 3a.

The planetary gear 30 has a key 3 on the support shaft 14.
By being engaged so as to rotate integrally with Oa, it is connected to the claw support case 13 so as to rotate integrally. That is, the planetary gear 30 is a gear that rotates the claw support case 13 with respect to the rotating case 10.

The first gear 31 is connected to the rotating case 1
The first support shaft portion 5 on one end side of the gear support shaft 50 supported in a double-supported state at a position eccentric to the first shaft center X1.
1 so as to be rotatably fitted around the first axis X1, the first axis 51 is eccentric with respect to the first axis X1, that is, the third axis X3 is rotatably rotated around the axis. It is supported by the case 10.

The second gear 32 is connected to the gear support shaft 50.
Of the second support shaft 52 which is located on the other end side of the first support shaft 51 and is displaced toward the first shaft center X1 with respect to the first support shaft 51.
The third shaft center X3 is rotatably fitted on the third shaft center X3.
Second spindle portion 5 closer to the first shaft center X1 than
It is rotatably supported by the rotating case 10 around the second axis, that is, the fourth axis X4.

The sun gear 23, the planetary gear 30, the first gear 31, and the second gear 32 are all formed as circular gears whose pitch circle is a perfect circle. The third axis X3 and the fourth axis X4 are disposed on a plane including the first axis X1 and the second axis X2. That is, the first axis X1, the second axis X2, the third axis X3, and the fourth axis X4 are arranged on the same plane.

Each of the first support shaft 51 and the second support shaft 52 has a shaft support 10b of the rotating case 10 for supporting the first support shaft 51 and a first gear 31.
And the collars 40 and 41 for preventing the gear from falling down are disposed between the second gear 32 and the shaft support portion 10c of the rotating case 10 supporting the second support shaft portion 52, respectively.
Are fitted.

The first support shaft 51 and the shaft support 10
b, and between the second support portion 52 and the support shaft mounting hole of the shaft support portion 10c, air vent passages extending over the entire length of the support shaft mounting hole. 70 are formed.

The one of the flow passages 70 on the side of the first support shaft 51 intersects with a plane parallel to the same plane and passing through the third shaft center X3 on the inner peripheral surface of the support shaft mounting hole. On the other hand, the channel 70 on the side of the second spindle portion 52 of the flow passage 70 is parallel to the same plane on the inner peripheral surface of the spindle mounting hole. It is configured by forming grooves at two locations that intersect with a plane passing through the fourth axis X4.
That is, as shown in FIG. 8, among the positions around the third axis X3 and the fourth axis X4, the positions are orthogonal to the same plane, and the third axis X3 and the fourth axis X4. The flow path 70 is formed at a position other than a position intersecting with a plane passing through the axis X4.

The shaft supports 10b and 10c are formed so as to bulge outward as shown in FIG. 2, and the outer peripheral surface is inclined at a set angle θ with respect to the shaft cores X3 and X4 as shown in FIG. It is formed on a tapered surface. As shown in FIGS. 9 and 10, one of the half-split case portions 10A and 10B is provided with a reinforcing rib 91 at an end located on the lower side in the rotation direction of the rotary case 10 with respect to the shaft support portions 10b and 10c. Is formed,
The reinforcing rib 91 is connected to the shaft supports 10b and 10c via a connecting rib 92 so as to receive the load applied to the shaft supports 10b and 10c. The connecting rib 92 is formed in a shape that becomes wider toward the reinforcing rib 91 side, and in the figure, the side surface of the connecting rib 92 is shown as an arc surface, but the side surface may be a flat surface. 90 is a half case part 10
A and 10B are inserted into and engaged with the holes 94 formed in the reinforcing rib forming portions of the half case portions 10A, 1B.
0B is a pin for positioning.

As shown in FIGS. 3 and 5, the rotation transmission mechanism D has a radius of the first gear 31 formed on the side of the first gear 31 facing the second gear 32. A cam groove 38 in a posture along the direction, and a crank pin protrudingly formed by simultaneously molding the second gear 32 on the side of the second gear 32 facing the first gear 31 when the second gear 32 is molded. 36.

The cam groove 38 has a pair of ridges 3 on its side.
9 and 39 are formed at intervals. The crank pin 36 is disposed at a position that is eccentric with respect to the fourth axis X4 that is the rotation axis of the second gear 32, and slidably enters the cam groove 38 of the first gear 31. It is formed as follows.

As described above, the rotating case 10 is driven to rotate, and when the first gear 31 rotates around the third axis X3 due to the rotating operation by the rotating case 10 and the meshing with the sun gear 23, the first gear 31 rotates. The torque is transmitted to the second gear 32 by the crank pin 36, and the second gear 32 rotates around the fourth axis X4. Since the third shaft center X3 and the fourth shaft center X4 are eccentric, the crank pin 36 rotates while sliding back and forth inside the cam groove 38 in the radial direction of the first gear 31. Transmit power. Therefore, the rotation transmission mechanism D is configured to rotate the first gear 31 and the second gear 32 so that the second gear 32 rotates at an irregular speed even if the first gear 31 rotates at a constant speed. Are linked at unequal speed.

Since the planetary gear 30 is rotated around the second axis X2 on the rotating case 10 rotating around the first axis X1 in the opposite direction to the rotating case 10, the seedlings are planted. When the movement of the attachment mechanism is observed from the outside, the planetary gear 30, that is, the claw support case 13 appears to swing in a predetermined angle range. In the seedling planting mechanism, as the rotating case 10 is driven to rotate, the tip of the seedling planting claws 12 of the claw support case 13 moves in the vertical elliptical locus T1 shown in FIG.
The sun gear 23 and the planetary gear 30 are linked so as to perform a seedling exercising motion as described in FIG.

As shown in FIG. 4, the seedling pushing tool 15 is fixed to one end of a support rod 15a which supports the nail support case 13 so as to slide along the seedling mounting nails 12, as shown in FIG. The nail is supported by a nail supporting case 13 so as to move along the seedling mounting nail 12.

The seedling pushing operation mechanism E is shown in FIGS.
As shown in the figure, the camshaft 1 supported by the pawl support case 13
6, a balance arm 20, an extruding spring 22, a connecting rod 18 connected to an end of the cam shaft 16 which protrudes from the claw support case 13 to the outside, and the like. The cam shaft 16 is rotatably supported by the claw support case 13 around the second axis X2.
A cam 17 for operating the seedling pushing tool 15 is integrally formed. The balance arm 20 is rotatably supported on the claw support case 13 via a support shaft 20 a around an axis parallel to the cam shaft 16. One end of the balance arm 20 is
A cam follower 21 which is connected to the support rod 15 a via a link 19 and receives the action of the cam 17 is provided at the other end of the balance arm 20. The push-out spring 22 urges the balance arm 20 to swing by using the claw support case 13 as a reaction force member to thereby support the support rod 1.
5a is slidably biased to the side protruding from the claw support case 13, and the cam follower 21 of the balance arm 20 is biased against the peripheral surface of the cam 17. The connecting rod 18 is attached to the cam shaft 16 of one claw support case 13 and the cam shaft 16 of the other claw support case 13. The cam shaft 16 is supported so that the cam shaft 16 does not rotate with respect to the rotating case 10.

As a result, the claw support case 13 and the cam shaft 16 rotate relative to each other within a predetermined rotation range as the seedling-claw 12 performs the seedling-planting movement. The balance arm 20 is swung around the support shaft 20a for the pressing operation and the operation by the push-out spring 22 to slide the support rod 15a. That is, the seedling pushing operation mechanism E is driven by the rotational force of the rotating case 10 as the seedling-attached nail 12 performs the seedling-planting motion, and the seedling pushing tool 15 is moved as shown by the two-dot chain line in FIG. The push-out spring 22 is moved to the action position located on the tip side of
Pushing operation by operating force by elastic restoring force of
As shown by the solid line in FIG.
The retraction operation is performed by the operating force of the cam 17 to the non-operation position located on the base end side of.

Accordingly, when the rotary case 10 is driven to rotate, each seedling support case 13 revolves around the first axis X1 for the rotation of the rotary case 10 and the relative rotation means S operates. So that the tip of the seedling-claw 12 rotates vertically between the seedling outlet of the seedling mounting table 4 and the field along a substantially elliptical locus T1. The seedling-claw 12 is caused to perform a seedling-planting movement, and the seedling pushing-out operation mechanism E provided in each seedling-claw supporting case 13 is rotated by the rotating case 10.
, And moves the seedling pushing tool 15 between the non-acting position and the acting position in conjunction with the seedling movement of the seedling-claw 12. Thereby, one seedling nail support case 1
The seedlings 12 of the third seedling and the seedlings 12 of the other seedling supporting case 13 are alternately cut from the mat-shaped seedlings placed on the seedling mounting table 4 to block one seedling. They are taken out, transported down to the field, and planted on the same planting strip. Then, while each of the seedling-claws 12 is moved downward from the top of the seedling outlet of the seedling mounting table 4 to the seedling-planting position, the seedling pushing-out tool 15 is in the non-operating position and the seedling-claw 12 is removed. When the seedlings can be held and the seedlings 12 reach the field to plant seedlings, the seedling pushing tool 15 moves to the operating position, and the seedlings held by the seedlings 12 are held. Is pushed out so as to be easily separated from the seedlings 12.

The gear support shaft 50 is, as shown in FIG.
It comprises a first support shaft portion 51, a second support shaft portion 52, and a connection shaft portion 53 for connecting the two in an eccentric position. The connecting shaft 53 of the first shaft 51
One end 51a on the opposite side is formed as a connecting portion that is inserted and supported in a shaft mounting hole of the shaft supporting portion 10b of the one half case portion 10A, and the other end 51b is formed on the other side. One gear 31 is formed on a gear supporting portion that is configured so as to be rotatable relative to the outside. The second spindle 52
Of the one end 52a on the opposite side to the connecting shaft 53,
The other half portion 52B is formed at a connecting portion inserted and supported in a shaft mounting hole of a shaft supporting portion 10c of the other half case portion 10B, and the other end 52b is fitted around the second gear 32 so as to be relatively rotatable. It is formed on the gear supporting portion configured as described above. The connecting shaft portion 53 does not interfere with the crankpin 36, and the first shaft portion 51 and the second shaft portion 52 are formed by a third shaft center X3 and a fourth shaft center X4. It is formed so as to be connected in an eccentric state. That is, the gear support shaft 50 is connected to the connecting portion 51 a which is an end of the first support shaft portion 51.
And the connecting portion 52a, which is an end of the second support shaft portion 52, is connected to the rotating case 10 at both ends, that is, the first gear 31 and the second gear 31 are supported by the rotating case 10 at both ends. The second gear 32 is supported.

The gear support shaft 50 has a first support shaft portion 51.
When the respective materials of the second shaft portion 52 and the connecting shaft portion 53 are molded, they are formed by simultaneously molding all the materials. That is, the first support shaft 51, the second support shaft 52, and the connection shaft 53 are integrally formed as a single component. And, as shown in FIG.
The shape and size of the cross section of the connecting shaft portion 53 when viewed in the axial direction are
The first support shaft portion 51 and the second support shaft portion 5 when viewed in the axial direction.
2 is formed in the same shape and the same size as the portion overlapping. The peripheral surface of the connecting shaft portion 53 is formed of two peripheral surface portions 53a and 53b that are opposed in the eccentric direction. One peripheral surface portion 53a is a peripheral surface centered on the third axis X3 and having a radius equal to the first spindle portion 51, that is, a peripheral surface continuous with the peripheral surface of the first spindle portion 51, The other peripheral surface portion 53b
Is a second support shaft 52 having a radius centered on the fourth shaft center X4.
That is, the peripheral surface is continuous with the peripheral surface of the second support shaft portion 52.

The seedling mounting mechanism includes a planetary gear 30 and a second gear 3 when the seedling mounting claw 12 takes out the seedling from the seedling mounting table 4.
2 to prevent the ratchet support case 13 from rattling and swinging due to the backlash with the teeth of the planetary gear 30 and the second gear 3.
And a collision preventing means for preventing collision with the second tooth.

As shown in FIGS. 2 and 3, the collision preventing means fixes the cam 60 to the support shaft 14 and
A cam arm 61 for contacting the cam 60 is swingably mounted on the hook 60, and a spring 62 for oscillating the cam arm 61 so as to contact the cam 60 is provided. Is located immediately before taking out the seedling from the seedling mounting table 4, the stepped portion 60 a formed on the cam 60 is pushed by the cam arm 61 to rotate the second gear 32 in advance, and the second gear 32 which is about to collide at the time of taking out the seedling is taken out. This is a means for preventing the collision of the teeth by bringing the gear 32 and the planetary gear 30 into contact with the teeth in advance.

[Another Embodiment] (1) In the above embodiment, the channel 70 is formed by forming a groove in the inner peripheral surface of the support shaft assembling hole. The flow path 70 may be formed by forming a groove on the outer peripheral surface of the two support shaft portions 52, and may be implemented.

(2) In the above embodiment, the channel 70 is formed by forming a groove in the inner peripheral surface of the support shaft assembling hole.
The flow path 70 may be formed by forming a groove in each of the inner peripheral surface of the support shaft assembling hole and the outer peripheral surfaces of the first support shaft portion 51 and the second support shaft portion 52.

(3) In the above embodiment, the shape and the size of the cross section of the connecting shaft 53 in the axial direction are determined by the first shaft 51 and the second shaft 52 in the shaft direction. Are the same shape and size as the overlapping portion, but the cross-sectional shape and size of the connecting shaft portion 53 when viewed in the axial direction are the first shaft portion 51 and the second shaft portion when viewed in the axial direction. 52 may be formed in a shape similar to the overlapping portion and larger than the overlapping portion as long as it does not interfere with the crankpin 36.

(4) In the above embodiment, the gear support shaft 50 is formed by integrating the first support shaft portion 51, the second support shaft portion 52, and the connection shaft portion 53. The first support shaft 51, the second support shaft 52, and the connecting shaft 53 may be formed as separate components.

(5) As the crank type rotation transmitting mechanism D, a cam groove 38 is provided on the side of the second gear 32 facing the first gear 31, A crank pin 36 eccentric to the rotation axis X3 of the first gear 31 is provided on the side surface facing the gear 32;
The crank pin 36 transmits the rotational force of the first gear 31 to the cam groove 38 of the second gear 32, and even if the first gear 31 rotates at a constant speed, the second gear 32 keeps the fourth shaft center. It is also possible to adopt a structure configured to rotate at an irregular speed around X4.

(6) The crank pin 36 is provided with a rotatable roller, is engaged with the cam groove 38 via the roller, and transmits a rotational power with a small frictional resistance. May be employed.

[Brief description of the drawings]

FIG. 1 is a side view of the entire seedling planting apparatus.

FIG. 2 is a sectional view of a seedling planting mechanism.

FIG. 3 is a sectional view of a rotating case.

FIG. 4 is a cross-sectional view of a claw support case.

FIG. 5 is a perspective view of the rotation transmitting mechanism in an exploded state.

FIG. 6 is a sectional view showing a disassembled state and an assembled state of the gear support shaft.

FIG. 7 is a sectional view of a connecting shaft portion of the gear support shaft.

FIG. 8 is a cross-sectional view of a spindle portion.

FIG. 9 is a sectional view of the rotating case in a split state.

FIG. 10 is a side view of a main part of the rotating case.

[Explanation of symbols]

 3 Planting Transmission Case 10 Rotating Case 12 Seedling Claw 13 Claw Support 14 Support Shaft 23 Sun Gear 30 Planetary Gear 31 First Gear 32 Second Gear 50 Gear Support Shaft 51 First Support Shaft 52 Second Shaft portion 53 connecting shaft portion 70 flow path X1 first shaft center X2 second shaft center X3 third shaft center X4 fourth shaft center D rotation transmission mechanism T1 trajectory S relative rotation means

──────────────────────────────────────────────────の Continued on the front page (72) Inventor Mamoru Kubo 64 Ishizukita-cho, Sakai City, Osaka Prefecture Inside Kubota Sakai Factory (72) Inventor Kunimitsu Makihara 64 Ishizukita-cho, Sakai City, Osaka Prefecture Kubota Sakai Manufacturing In-house (72) Inventor Noboru Higashio 64 Ishizu-Kitamachi, Sakai City, Osaka Prefecture Inside Kubota Sakai Factory (72) Inventor Koji 64 Ishizu-Kitamachi, Sakai City, Osaka Prefecture Inside Kubota Sakai Factory (56) References JP-A-8-266121 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A01C 11/02 370-387

Claims (2)

(57) [Claims] 1. A claw support having a seedling mounting claw attached to a rotating case rotatably supported on a planting transmission case around a first shaft center in a second case parallel to the first shaft center. The sun gear rotatably supported around the axis of the shaft, and is non-rotatably fixed to the planting transmission case, and is fixed to a support shaft that pivotally supports the claw support in a state of being integrally rotated. A planetary gear, a first gear rotating around a third axis parallel to the first axis in a state of meshing with the sun gear, and eccentric with the third axis in a state of meshing with the planetary gear; A second gear that rotates around the fourth shaft center, an eccentric crank type rotation transmission mechanism that interlocks the first gear and the second gear at unequal speeds is provided to rotate the rotation case. Accordingly, the relative rotation of the claw support and the rotating case is relatively rotated so that the tip of the seedling-claw draws a vertically long elliptical locus. Forming a step, supported by the rotating case at one end, and a first spindle portion rotatably supporting the first gear at the other end, and supported at one end by the rotating case, and A gear shaft including a second shaft portion rotatably supporting the second gear at the other end side, and a connecting shaft portion for eccentrically connecting the shaft portions to each other. A seedling planting mechanism, comprising a space between the first spindle and a spindle mounting hole of a rotary case that inserts and supports the first spindle, and a rotation case that inserts and supports the second spindle and the second spindle. A seedling planting mechanism in which a flow path for venting air is formed between each of the shaft mounting holes and the entire length of the shaft mounting hole. 2. The first axis, the second axis, the third axis, and the fourth axis are arranged on the same plane, and the third axis and the fourth axis are arranged on the same plane. 2. The flow path according to claim 1, wherein the flow path is formed at a position other than a position orthogonal to the same plane and intersecting with a plane passing through the third axis center and the fourth axis center. Seedling planting mechanism.