JP2934058B2 - Solid locus seedling planting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary seedling planting device used for a rice transplanter, for example, and more particularly to a three-dimensional locus seedling in which the tip of a seedling extracting and planting mechanism moves in a three-dimensional closed loop locus. The present invention relates to a planting device.

[0002]

2. Description of the Related Art Conventionally, a transmission body extending in a predetermined length radial direction from a center of rotation is rotated via a rotating shaft so as to rotate in one direction, facing a seedling taking-out opening for taking out a seedling placed on a seedling mounting table. A seedling take-out and planting mechanism is attached to the tip of the transmission body via a rotation shaft, and the seedling take-out and planting mechanism takes out seedlings one by one from a seedling take-out port and plant them in a field. For example, a known seedling planting machine described in Japanese Patent Publication No. 2-24489 filed by the present applicant is known. In this prior art, the rotation axis of the transmission and the rotation axis of the seedling picking and planting mechanism are arranged in parallel so that the tip of the seedling picking and planting mechanism moves in a plane locus. It was done.

[0003]

In the above-mentioned prior art, the movement trajectory defined by the tip of the seedling picking / planting mechanism is in a substantially vertical plane, and the seedling is taken out of the seedling outlet and the seedling picking / planting mechanism. At the strip interval determined by the left and right spacing of
It is planted at substantially constant intervals before and after, and generally the spacing between the front and rear is narrower than the interval between the left and right streaks. For this reason, there were the following problems. Seedling removal
When trying to plant a seedling larger than the size of the planting mechanism, the seedling removal / planting mechanism (seedling removal / planting claw) interfered with the planted seedling, and the planting could not be performed normally. There is only one seedling take-out and planting position of the seedling take-out and planting mechanism for one seedling take-out port.
A planting mechanism was needed. Since the planting direction of the seedlings is almost limited to a plane including the locus drawn by the tip of the seedling removal and planting mechanism, it is difficult to plant the plants in the lateral direction with respect to the traveling direction of the body. The spacing of the planted seedlings is wide in the left-right direction and narrow in the front-back direction, and the planting style is limited. For example, dense planting with uniform growth was impossible. The present invention has been made to solve the above problems.

[0004]

In order to achieve the above object, a three-dimensional trajectory seedling plant according to the present invention is provided with a predetermined position from a center of rotation facing a seedling take-out opening for taking out a seedling placed on a seedling mounting table. A transmission element extending in the length radial direction is rotatably supported via a rotation shaft so as to rotate in one direction, and a seedling picking and planting mechanism is attached to a tip end of the transmission element via a rotation shaft, and the seedling extraction / In a seedling planting machine in which seedlings are taken out one by one from a seedling take-out port and planted in a field by a planting mechanism, the rotation axis of the transmission and the rotation axis of the seedling removal / planting mechanism are arranged non-parallel. The tip of the seedling removal / planting mechanism is configured to move in a three-dimensional closed-loop trajectory having a bulge in the lateral direction with respect to the traveling direction of the fuselage. Gear with a pitch-shaped curved surface It has the rotating shaft side is provided a non-circular gear or an eccentric gear that performs non-uniform rotation transmission so that power transmission to the rotating shaft side, respectively, characterized.

[0005]

With the above arrangement, the three-dimensional locus planting apparatus of the present invention performs the following operations. The rotation axis of the seedling removal and planting mechanism and the rotation axis of the transmission are not arranged in parallel,
Take out seedlings around a rotation axis that is not parallel to the rotation axis of the transmission.
Because the planting mechanism swings in the same cycle as the rotation of the transmission,
The tip of the seedling removal and planting mechanism draws a three-dimensional closed loop trajectory with a bulge in the horizontal direction with respect to the traveling direction of the aircraft,
Take out the seedlings from the seedling outlet and plant them in the field. Therefore, the seedling planting position can be shifted laterally with respect to the seedling outlet with respect to the machine body advancing direction, and transmission is performed as a set having different angles between the rotation axis of the seedling extraction / planting mechanism and the rotation axis of the transmission. When attached to the body, the seedlings taken out from one seedling outlet can be alternately planted in two rows. A gear having a conical or substantially conical pitch curved surface and a non-circular gear or an eccentric gear that performs non-uniform rotation transmission are provided in the transmission body so that power is transmitted from the rotation shaft side to the rotation shaft side. Therefore, the seedling removal and planting mechanism can be easily attached to one transmission body via a rotation axis that is not parallel to the rotation axis of the transmission body. Also, seedling removal and
Those having different angles between the rotation axis of the planting mechanism and the rotation axis of the transmission can be attached to the transmission as a set.
After the seedlings are planted, the escape direction of the seedling removal and planting mechanism for the planted seedlings is set to be transverse to the direction of travel of the aircraft, so that the seedling removal and planting mechanism does not interfere with the planted seedlings. Large seedlings can be planted compared to the size of the seedling removal and planting mechanism.
It is possible to arrange and configure the entire seedling planting section including the seedling mounting table in a direction transverse to the traveling direction of the fuselage, which is advantageous in terms of the width of the fuselage, rolling, and the like. Seedlings can be planted, for example, in a staggered manner, so that their growth can be uniform and the planting density can be increased.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be specifically described below with reference to the accompanying drawings. In FIG. 2, reference numeral 1 denotes a passenger body, which is a pair of left and right front wheels 2 and rear wheels 3.
The front and rear wheels 2 and 3 are driven to travel, and a steering handle 5 is provided in front of the cockpit 4. A seedling planting section 7 is attached to the rear portion of the riding body 1 via a lifting link 6 that rotates up and down by an expansion and contraction operation of a hydraulic cylinder (not shown) so as to be able to ascend and descend to constitute a riding type rice transplanter. The seedling planting section 7 is operated by receiving power transmission from the passenger car body 1, and is provided with a float 9 supported below the main body 8 by a link mechanism so as to be able to move up and down with respect to the main body 8. I have.

As shown in FIGS. 1, 3 and 4, a seedling M is placed on the upper side of the main body 8 and supported in a forwardly inclined posture so as to reciprocate with a predetermined stroke in the left-right direction. The seedling mounting table 10, the seedling extraction opening 12 opened in the seedling support plate 11 fixed to the main body 8 side corresponding to the inclined lower end of the seedling mounting table 10, and facing the seedling extraction opening 12. Rotating shaft 1
4, a transmission 13 extending from the rotation center to both sides in the radial direction by a predetermined length, and a rotating shaft is provided at both ends of the transmission 13 in the direction of the arrow. There are provided seedling picking and planting mechanisms 17, 18 supported via rotating shafts 15, 16 arranged non-parallel to 14. When the transmission 13 rotates around the rotation shaft 14, the tips of the seedling picking and planting mechanisms 17 and 18 form three-dimensional closed loop trajectories A and B having a bulge in the lateral direction with respect to the traveling direction of the body. Drawing and exercising, the seedlings M are taken out one by one from the seedling outlet 12 and planted in the field F.

The rotating shaft 14 of the transmission 13 is fixed to the main body 8 via a fixing flange 19 and inserted into an outer cylinder 20 projecting in the horizontal direction.
The outer portion 13a of the transmission 13 is fixed to the distal end portion 20a by a fixing screw 21. The inner portion 13b of the transmission 13 is rotatably mounted on the outer peripheral portion of the outer cylinder 20 via a bearing 22. Supported. And the rotating shaft 14
Is rotated, the transmission 13 also rotates. A sun gear 23 made of a non-circular gear or an eccentric gear housed in the transmission 13 is fixedly provided on the outer periphery of the distal end portion of the outer cylinder 20. An intermediate gear 24 made of a non-circular gear or an eccentric gear meshing with the sun gear 23 has an intermediate shaft 25 in the transmission 13.
And an intermediate gear 26 composed of a gear (bevel gear or conical gear) having a conical or substantially conical pitch curved surface fixed to the intermediate shaft 25 is also rotated.

The transmission 13 is bent outwardly in the meshing direction of the intermediate gear 26 to form a bent portion 13c. Inside the bent portion 13c, a conical or substantially conical shape meshing with the intermediate gear 26 is formed. The rotating shafts 15 and 16 to which the planetary gears 27 having the pitch curved surfaces are fixed are pivotally supported, and the distal ends are projected outside the bent portion 13c, and the outer cylinders 15a and 15a fixed to the bent portion 13c are respectively provided at the distal ends. 16a
At the same time, the seedling extracting and planting mechanisms 17 and 18 are mounted so as to rotate (swing). Seedling removal and planting mechanism 1
Reference numerals 7 and 18 denote seedling removal and planting claws 17a and 18a and seedling transplanting forks 17b and 18 in the same manner as those conventionally known.
b, a cam 28 fixed to the outer cylinders 15a and 16a, and a cam follower pivotally supported by a pin 29a so as to rotate in contact with the cam 28 and urged in the axial direction by a spring. 29, the tip of the cam follower 29 is connected to the base ends of the seedling-planting forks 17b, 18b. In addition, seedling removal and planting claws 17a, 18a
Are fixed to the outside by fixing screws 30.

In the riding type rice transplanter having such a configuration, as shown in FIG. 2, a seedling planting section 7 is attached to the rear portion of the riding body 1 via a lifting link 6 so as to be able to ascend and descend and is introduced into a paddy field. Then, power is transmitted from the passenger car body 1 to the seedling planting section 7, and the passenger car body 1 travels in a state where the float 9 is in contact with the rice field, thereby performing seedling planting work. At this time, in the three-dimensional track seedling planting apparatus, the transmission 13 rotates in the direction of the arrow in FIG. 1 due to the rotation shaft 14 rotating at a constant speed. Along with this, the speed is changed at a non-uniform speed in the transmission 13 so that the seedling removal and planting mechanism 1
7, 18 rotate and swing around the rotation shafts 15, 16;
The tips of the seedling removal / planting claws 17a and 18a are traces A and B.
The seedlings M placed on the seedling mounting table 10 are taken out from the same seedling outlet 12 and planted and planted claws 17a, 18a
Is taken out one by one and planted in the field F. When planting the seedlings M in the field F, the seedlings fork 17b,
The seedling M is extruded by 18b and pushed into the field F.

FIG. 1 is a side view of a seedling picking and planting apparatus, in which a posture of a seedling picking and planting mechanism 18 is inclined with respect to a vertical direction with respect to the paper surface, and a rotating shaft 14 is perpendicular to the paper surface and horizontal. On the other hand, both of the rotating shafts 15 and 16 are not parallel to the rotating shaft 14 and are inclined, and as a result, FIG.
As shown in the figure, the tips of the seedling picking and planting claws 17a and 18a move by drawing three-dimensional closed loop trajectories A and B having bulges in the lateral direction with respect to the traveling direction of the airframe.
The seedlings M are taken out of the plant 2 one by one and planted separately in two places on the left and right of the field F. Further, the size of the seedling extracting / planting mechanisms 17 and 18 is slightly different in the above-described embodiment, and the trajectories of movement in side view are shifted like A and B. However, the present invention is not limited to this embodiment, and the configuration may be such that the motion trajectories in the side view are the same.

The transmission operation for rotating the transmission 13 by rotating the rotating shaft 14 at a constant speed as described above and swinging the seedling picking and planting mechanisms 17 and 18 will be described in detail with reference to FIG. When the transmission 13 rotates at a constant speed by the rotating shaft 14, the intermediate gear 24 meshing with the sun gear 23 fixed to the outer cylinder 20 fixed to the fixing flange 19 rotates at an irregular speed, and is coaxial with the intermediate gear 24. Intermediate gear 26 rotates at an irregular speed.
The rotation of the intermediate gear 26 causes the planetary gear 27 meshing with the intermediate gear 26 to rotate at an unequal speed, causing the rotation shafts 15 and 16 to rotate at an unequal speed, thereby causing the seedling picking and planting mechanisms 17 and 18 to swing. When the seedling removal / planting mechanisms 17 and 18 swing, the cam follower 29 abuts or is released from the cam 28 fixed to the outer cylinders 15a and 16a, and rotates around the pin 29a. Seedling planting forks 17b, 18
b is reciprocated between a retracted state in which the seedlings M are taken out and moved to the field F as shown in FIG. 1 and a forward state in which the seedlings M are pushed out when the seedlings M are planted in the field F. And take out the seedlings
The seedlings M are cooperated with the planting claws 17a and 18a to take out the seedlings M.
2 and planted in field F.

Here, the rotating shafts 15 and 16 are not parallel to the rotating shaft 14, and the swinging of the seedling removing and planting mechanisms 17 and 18 is performed in a plane formed by the rotation of the transmission 13 about the rotating shaft 14. Absent. As a result, the movement of the tips of the seedling picking / planting claws 17a, 18a, which is a combination of the swing of the seedling picking / planting mechanisms 17, 18 and the rotation of the transmission 13, becomes three-dimensional, and is transverse to the traveling direction of the machine. The robot moves while drawing three-dimensional closed loop trajectories A and B having bulges in the directions. Therefore, as shown in FIG. 4, the seedling extracting and planting mechanisms 17 and 18 that rotate around the same rotating shaft 14 are different from each other in a direction parallel to the rotating shaft 14 with respect to one seedling extracting port 12. The combination of the seedling removal / planting mechanisms 17, 18 for planting the seedlings M at two positions is possible. In the above embodiment, the seedling picking / planting mechanism 17 seeds the seedlings M inside the machine body, and the seedling picking / planting mechanism 18 seeds the seedlings M outside the machine body.

Then, the seedling removal and planting mechanisms 17, 18
5 can be staggered as shown in FIG. 5A, and the planting intervals S of the seedlings M are equal. On the other hand, as shown in FIG.
The seedling m planted by the conventional rice transplanter at the same planting density as the seedling M planted by the seedling removal / planting mechanisms 17 and 18 of the present invention has a vertical planting interval s which is smaller than the planting interval S according to the present invention. It is narrow and S> s. Therefore, in the seedlings M planted according to the present invention, competition hardly occurs at the growth stage, and stable growth can be expected to increase the yield. As shown in FIG. 6, the seedling removal / planting device of the present invention has a rotation axis of the transmission and a rotation axis of the seedling removal / planting mechanism arranged in parallel, and the tip of the seedling removal / planting mechanism is In combination with a conventional seedling picking and planting mechanism that moves by drawing a plane trajectory C in the traveling direction of the aircraft,
m may be planted.

Further, as shown in FIG. 7, the seedling picking and planting apparatus of the present invention comprises a non-parallel rotating shaft 14 and a rotating shaft 15 (16) instead of the planetary gear 27 of the above embodiment. , A planetary gear 27a for transmitting unequal speed rotation is provided,
The intermediate gear 26 in FIG. 3 is omitted, and the thickness of the transmission 13 is reduced. Such a variable speed planetary gear 27
a is obtained by tilting the rotary shaft 15 (16) of the conical gear by a predetermined angle with the vertex of the pitch cone as the origin, or
For example, it can be created by using a gear cutting cutter having the same shape as the intermediate gear 24 to be meshed. As described above, although it is somewhat difficult to prepare the gears, it is possible to configure a seedling removal and planting device suitable for high-speed rotation, in which the thickness of the transmission body 13 is small and the transmission system path can be simplified. I can do it.

[0016]

According to the three-dimensional locus seedling planting apparatus of the present invention as described above, the following effects can be obtained. The rotation axis of the seedling removal and planting mechanism and the rotation axis of the transmission are not parallel, and the seedling removal and planting mechanism is the same as the rotation of the transmission around the rotation axis that is not parallel to the rotation axis of the transmission. Since it oscillates periodically, the tip of the seedling picking and planting mechanism draws a three-dimensional closed loop trajectory with a bulge in the horizontal direction with respect to the traveling direction of the aircraft, and it is possible to take out the seedling from the seedling outlet and plant it in the field . Therefore, the seedling planting position can be shifted in the lateral direction with respect to the machine body traveling direction with respect to the seedling taking-out opening, and a group having a different angle formed by the rotation axis of the seedling taking-out / planting mechanism and the rotation axis of the transmission as a group. By attaching the seedling to the transmission, it is possible to alternately plant two seedlings taken out from one seedling outlet. A gear having a conical or substantially conical pitch curved surface and a non-circular gear or an eccentric gear that performs non-uniform rotation transmission are provided in the transmission body so that power is transmitted from the rotation shaft side to the rotation shaft side. Therefore, the seedling removal and planting mechanism can be easily attached to one transmission body via a rotation axis that is not parallel to the rotation axis of the transmission body. In addition, a pair of rotation axes of the seedling removal / planting mechanism and the rotation axis of the transmission body having different angles can be attached to the transmission as a set. After the seedlings are planted, the escape direction of the seedling removal and planting mechanism for the planted seedlings is set to be transverse to the traveling direction of the aircraft,
The seedling picking / planting mechanism does not interfere with the planted seedlings, and a seedling larger than the size of the seedling picking / planting mechanism can be planted. The entire seedling planting section, including the seedling rest, is placed sideways to the direction of travel of the aircraft.
This makes it possible to reduce the width of the fuselage and to reduce rolling, vibration, etc. of the fuselage. Seedlings can be planted, for example, in a staggered manner, so that their growth is uniform and the planting density of the seedlings can be increased.

[Brief description of the drawings]

FIG. 1 is a side view of a three-dimensional locus seedling planting apparatus according to the present invention.

FIG. 2 is a side view of the entire riding type rice transplanter in which a seedling planting section equipped with the three-dimensional track seedling planting device according to the present invention is mounted on a riding body.

FIG. 3 is a sectional view of the three-dimensional locus seedling planting apparatus.

FIG. 4 is a rear view of the seedling planting state by the three-dimensional locus seedling planting apparatus.

FIG. 5A is a perspective view of a seedling planting state by the three-dimensional locus seedling planting apparatus of the present invention, and FIG. 5B is a perspective view of a state where seedlings are planted at the same planting density by a conventional rice transplanter.

FIG. 6 is a rear view of a state where the three-dimensional locus seedling-planting mechanism of the present invention and a conventional seedling removal / planting mechanism are combined and planted.

FIG. 7 is a sectional view of another embodiment of the three-dimensional locus seedling planting apparatus according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Passenger car body 2 Front wheel 3 Rear wheel 4 Pilot seat 5 Steering handle 6 Lifting link 7 Seedling planting part 8 Body of seedling planting part 9 Float 10 Seedling stand 11 Seedling support plate 12 Seedling take-out port 13 Transmission body 14 Rotating shaft 15, 16 Rotating shaft 17, 18 Seedling removal / planting mechanism 17a, 18a
Seedling removal / planting claw 17b, 18b Seedling implantation fork 19 Fixing flange 20 Outer cylinder 21, 30 Fixing screw 22 Bearing 23 Sun gear 24, 26 Intermediate gear 25 Intermediate shaft 27 Planetary gear 28 Cam 29 Cam follower A, B, C・ Tip locus of planting mechanism (claw) F Field M, m Seedling S, s Planting interval of seedling

Claims (2)

(57) [Claims] 1. A shaft extending through a rotation shaft so as to rotate in one direction a transmission body extending in a radial direction from a center of rotation and extending in a predetermined length, facing a seedling take-out opening for taking out a seedling placed on a seedling mounting table. Support, and take out seedlings from the tip of this transmission body via a rotating shaft.
Attach the planting mechanism, by the seedling removal and planting mechanism,
In a seedling planting machine configured to take out seedlings one by one from a seedling takeout port and plant the seedlings in a field, a rotation axis of the transmission and a rotation axis of a seedling removal / planting mechanism are arranged in a non-parallel manner. A three-dimensional trajectory seedling planting device, wherein the tip of the take-out / planting mechanism is configured to move by drawing a three-dimensional closed loop trajectory having a bulge in a lateral direction with respect to the traveling direction of the body. 2. A gear having a conical or substantially conical pitch curved surface and a non-circular gear or an eccentric gear for performing non-uniform rotation transmission are provided in the transmission body, and the rotation shaft side to the rotation shaft side. The three-dimensional locus seedling planting apparatus according to claim 1, wherein the power is transmitted to the seedling.