JPH04365408A - Seedling planter of solid locus - Google Patents

Abstract

PURPOSE:To alternately plant seedlings taken out of one seedling taking outlet in two rows by installing a rotating shaft of a transmission unit extending from the center of rotation in a radial direction to a prescribed length and revolving shafts of a seedling taking out and a planting mechanisms in a nonparallel specific state. CONSTITUTION:A rotating shaft extending from the center of rotation in the radial direction to a prescribed length is horizontally installed and both revolving shafts of a seedling taking out and a planting mechanisms are kept in a tilted state nonparallel to the rotating shaft of the transmission unit. The tips of seedling taking out and planting pawls are set so as to move describing solid closed loopy loci (A) and (B) having a bulge in the transverse direction relatively to the forward direction of the machine body. Seedlings (M) taken out of a seedling taking out port 12 one by one are dividedly planted in two left and right places of a field (F).

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a rotary seedling planting device such as used in a rice transplanter, and in particular to a three-dimensional trajectory seedling device in which the tip of a seedling take-out/planting mechanism moves in a three-dimensional closed loop trajectory. This invention relates to a planting device.

0002

[Prior Art] Conventionally, a transmission body, which extends in a radial direction for a predetermined length from a center of rotation, is rotated in one direction through a rotating shaft, facing a seedling take-out port for taking out seedlings placed on a seedling stand. A seedling retrieval/planting mechanism is attached to the tip of the transmission body via a rotating shaft, and the seedling retrieval/planting mechanism takes out seedlings one by one from the seedling retrieval port and plants them in the field. As a seedling planting machine, for example, one described in Japanese Patent Publication No. 2-24489 filed by the applicant of the present application is known. In this prior art, the rotation axis of the transmission body and the rotation axis of the seedling retrieval/planting mechanism are arranged in parallel, so that the tip of the seedling retrieval/planting mechanism moves in a planar trajectory. That's what I did.

0003

[Problems to be Solved by the Invention] In the above-mentioned prior art, the locus of motion drawn by the tip of the seedling take-out/planting mechanism is in a substantially vertical plane, and the seedlings are separated from the seedling take-out port and the seedling take-out/plant mechanism. With the row spacing determined by the left and right spacing of
They are planted at approximately constant intervals from front to back, and generally the distance between front and rear plantings is narrower than the row spacing on either side. For this reason, there were the following problems. ■ If you try to plant a seedling that is larger than the size of the seedling retrieval/planting mechanism, the seedling retrieval/planting mechanism (seedling retrieval/planting claw) will interfere with the planted seedlings, making it impossible to plant them properly. I could not do it. ■ The number of seedling removal and planting positions of the seedling removal/planting mechanism for one seedling removal port is one, and as many seedling removal ports and seedling removal/planting mechanisms as the number of planting rows are required. ■ The direction in which seedlings are planted is almost limited to the plane that includes the trajectory drawn by the tip of the seedling retrieval/planting mechanism, making it difficult to plant them laterally to the direction of movement of the aircraft. ■ The distance between the planted seedlings was wide in the left-right direction and narrow in the front-back direction, which limited the planting style, and for example, dense planting with uniform growth was impossible. The present invention has been made to solve the above problems.

0004

[Means for Solving the Problems] In order to achieve the above object, the three-dimensional trajectory seedling planting device of the present invention has the following features: A transmission body extending in the radial direction for a predetermined length is supported via a rotation shaft so as to rotate in one direction, and a seedling retrieval/planting mechanism is attached to the tip of the transmission body via the rotation shaft, and the seedling is taken out. - In a seedling planting machine that uses a planting mechanism to take out seedlings one by one from a seedling take-out port and plant them in a field, the rotation axis of the transmission body and the rotation axis of the seedling take-out/planting mechanism are arranged non-parallel. and the tip of the seedling retrieval/planting mechanism is configured to move in a three-dimensional closed loop trajectory with a bulge in the lateral direction with respect to the moving direction of the machine; ■ There is a conical or Each gear is characterized by the provision of a gear with a nearly conical pitch curved surface and a non-circular gear or an eccentric gear that transmits rotation at an inconstant speed to transmit power from the rotating shaft side to the rotating shaft side. do.

[0005]

[Function] With the above-described configuration, the three-dimensional trajectory seedling planting device of the present invention performs the following functions. ■ The rotation axis of the seedling retrieval/planting mechanism and the rotation axis of the transmission body are arranged so that they are not parallel, and the seedling retrieval/planting mechanism rotates around the rotation axis that is not parallel to the rotation axis of the transmission body. Since it oscillates at the same frequency, the tip of the seedling retrieval/planting mechanism draws a three-dimensional closed loop trajectory with a bulge in the lateral direction with respect to the direction of movement of the machine, and takes out the seedlings from the seedling retrieval port and plants them in the field. Therefore, the seedling planting position can be shifted laterally with respect to the seedling take-out port with respect to the direction of movement of the machine, and the rotation axis of the seedling take-out/planting mechanism and the rotation axis of the transmission body can be transmitted as a set with different angles. When attached to the body, seedlings taken out from one seedling outlet can be planted alternately in two rows. ■ A gear with a conical or almost conical pitch curved surface and a non-circular gear or eccentric gear that transmit rotation at an inconstant speed are installed in the transmission body to transmit power from the rotating shaft side to the rotating shaft side. Therefore, the seedling retrieval/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. Further, it is possible to attach to the transmission body a set in which the rotation axis of the seedling retrieval/planting mechanism and the rotation axis of the transmission body have different angles. ■ After planting the seedlings, if the direction in which the seedling extraction/planting mechanism escapes from the planted seedlings is lateral to the direction of movement of the aircraft, the seedling extraction/planting mechanism will not interfere with the planted seedlings. , it is possible to plant large seedlings compared to the size of the seedling take-out/planting mechanism. ■
The entire seedling planting section including the seedling platform can be arranged and configured laterally with respect to the traveling direction of the machine body, which is advantageous in terms of the width, rolling, etc. of the machine body. ■ By planting seedlings in a staggered manner, for example, it is possible to make their growth uniform and increase the planting density.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the accompanying drawings. In FIG. 2, reference numeral 1 denotes a passenger vehicle body, and this passenger vehicle body 1 includes a pair of left and right front wheels 2 and a rear wheel 3.
The front and rear wheels 2 and 3 are respectively driven to drive the vehicle, and a steering handle 5 is provided in front of the driver's seat 4. A seedling planting section 7 is attached to the rear of the vehicle body 1 so as to be movable up and down via an elevating link 6 that rotates up and down by the expansion and contraction operation of a hydraulic cylinder (not shown), thereby configuring a riding rice transplanter. The seedling planting section 7 is operated by receiving power transmitted from the passenger vehicle body 1, and is provided with a float 9 supported vertically movably with respect to the main body 8 by a link mechanism on the lower side of the main body 8 which also serves as a transmission case. There is.

As shown in FIGS. 1, 3, and 4, seedlings M are placed on the upper side of the main body 8, and are supported in a forward-leaning position so as to move back and forth with a predetermined stroke in the left and right direction. A seedling take-out port 12 opened in a seedling support plate 11 fixed to the main body 8 side, which corresponds to the inclined lower end of the seedling stand 10, and a seedling take-out port 12 facing the seedling take-out port 12. rotation axis 1
A transmission body 13 is pivotally supported to rotate in one direction (in the direction of the arrow in FIG. Seedling retrieval/planting mechanisms 17 and 18 supported via rotation shafts 15 and 16 disposed non-parallel to 14 are provided. As the transmission body 13 rotates around the rotation shaft 14, the tips of the seedling retrieval/planting mechanisms 17 and 18 follow three-dimensional closed loop trajectories A and B that have bulges in the lateral direction with respect to the moving direction of the machine. 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 body 13 is inserted into an outer cylinder 20 that is fixed to the main body 8 via a fixed flange 19 and protrudes in the horizontal direction, and its tip 20a is inserted into the outer cylinder 20.
The outer part 13a of the transmission body 13 is fixed to this tip part 20a by a fixing screw 21, and the inner part 13b of the transmission body 13 is rotatably attached to the outer circumference of the outer cylinder 20 via a bearing 22. supported. And the rotating shaft 14
When the transmission body 13 rotates, the transmission body 13 also rotates. A sun gear 23 made of a non-circular gear or an eccentric gear housed in the transmission body 13 is fixed to the outer periphery of the tip of the outer cylinder 20 . Inside the transmission body 13, an intermediate gear 24 consisting of a non-circular gear or an eccentric gear that meshes with the sun gear 23 is fixed to an intermediate shaft 25. An intermediate gear 26 consisting of a gear (bevel gear or conical gear) having a pitch curved surface is rotated together.

[0009] The transmission body 13 is bent outward in the meshing direction of the intermediate gear 26 to form a bent portion 13c, and a conical or almost conical shape that meshes with the intermediate gear 26 is provided in the bent portion 13c. Rotating shafts 15 and 16 to which a planetary gear 27 having a pitch curved surface is fixed are respectively supported, and an outer cylinder 15a fixed to the bending part 13c is provided on each tip side, with the tip side protruding outside the bending part 13c. Together with 16a, rotate (swing) the seedling retrieval/planting mechanisms 17 and 18.
It is installed as follows. Seedling retrieval/planting mechanism 17,
18 is equipped with seedling retrieving/planting claws 17a, 18a and seedling planting forks 17b, 18b, as well as conventionally known ones, and has a cam 28 fixed to the outer cylinders 15a, 16a and a cam 28 in contact therewith. pin 29 so that it can be rotated
A cam follower 29 is provided, which is pivotally supported by a cam follower 29 and axially biased by a spring, and the tip of the cam follower 29 is connected to the base ends of the seedling planting forks 17b and 18b. Further, the seedling removal/planting claws 17a, 18a are fixed to the outside by fixing screws 30.

[0010] In the riding type rice transplanter having such a configuration, as shown in FIG.
The seedling planting section 7 is mounted so as to be movable up and down through the rice paddies, and the seedling planting section 7 is installed in a paddy field, power is transmitted from the passenger vehicle body 1 to the seedling planting section 7, and the passenger vehicle body 1 is driven with the float 9 in contact with the rice field. , to carry out seedling planting work. At this time, in the three-dimensional trajectory seedling planting device, the rotating shaft 14 rotates at a constant speed, so that the transmission body 1
3 rotates in the direction of the arrow in FIG. Along with this, the speed is changed non-uniformly within the transmission body 13, and the seedling retrieval/planting mechanism 17
, 18 rotate and oscillate around the rotation shafts 15 and 16, and the tips of the seedling retrieval/planting claws 17a and 18a move along trajectories A and B, thereby removing the seedlings M placed on the seedling stand 10. The seedlings are taken out one by one from the same seedling take-out port 12 using the seedling take-out/planting claws 17a, 18a and planted in the field F. When planting seedlings M in field F, use the seedling planting forks 17b, 1.
The seedling M is pushed out by 8b and pushed into the field F.

FIG. 1 is a side view of the seedling retrieval/planting device, in which the seedling retrieval/planting mechanism 18 is tilted with respect to the direction perpendicular to the plane of the paper, and the rotating shaft 14 is perpendicular to the plane of the paper and is horizontal. On the other hand, the rotation axes 15 and 16 are both non-parallel to the rotation axis 14 and are inclined, and as a result, as shown in FIG.
As shown in the figure, the tips of the seedling retrieval/planting claws 17a and 18a move in three-dimensional closed loop trajectories A and B that have bulges in the lateral direction with respect to the moving direction of the machine, and the seedling retrieval port 1
Seedlings M are taken out one by one from No. 2 and planted in two separate locations on the left and right sides of field F. Further, the dimensions of the seedling retrieval/planting mechanisms 17 and 18 are slightly different in the above embodiment, and the movement trajectories in side view are shifted as shown in A and B. However, the present invention is not limited to this embodiment, and the configuration may be such that the loci of motion in side view are the same.

The transmission operation in which the rotary shaft 14 rotates at a constant speed to rotate the transmission body 13 and swing the seedling retrieval/planting mechanisms 17 and 18 as described above will be explained in detail with reference to FIG. When the transmission body 13 rotates at a constant speed by the rotating shaft 14, the intermediate gear 24 that meshes with the sun gear 23 fixed to the outer cylinder 20 fixed to the fixed flange 19 rotates at an inconstant speed, and the intermediate gear 24 rotates at a constant speed. The intermediate gear 26 rotates at an inconstant speed. The rotation of the intermediate gear 26 causes the planetary gear 27 meshing therewith to rotate at a non-uniform speed, causing the rotating shafts 15, 16 to rotate at a non-uniform speed, thereby swinging the seedling retrieval/planting mechanisms 17, 18. When the seedling retrieval/planting mechanisms 17 and 18 swing, the cam follower 29 contacts or releases the cam 28 fixed to the outer cylinders 15a and 16a, and rotates around the pin 29a. Seedling planting fork 17b, 18
b is reciprocated between a backward state in which seedlings M are taken out and moved to field F and a forward state in which seedlings M are pushed out when planted in field F, as shown in FIG. Then, take out the seedlings
Working together with the planting claws 17a and 18a, the seedlings M are taken out from the seedling removal port 1.
Take out from 2 and plant in field F.

[0013] Here, the rotation axes 15 and 16 are not parallel to the rotation axis 14, and the oscillation of the seedling retrieval/planting mechanisms 17 and 18 is performed within a plane formed by the rotation of the transmission body 13 around the rotation axis 14. do not have. As a result, the motion of the tips of the seedling retrieval/planting claws 17a, 18a, which is a combination of the rocking motion of the seedling retrieval/planting mechanisms 17, 18 and the rotation of the transmission body 13, becomes three-dimensional, transverse to the direction of movement of the machine. It moves by drawing three-dimensional closed loop trajectories A and B with directional bulges. Therefore, the seedling extractor, which rotates around the same rotating shaft 14,
Although it is a planting mechanism 17, 18, as shown in FIG. , 18 combinations are possible. In the above embodiment, the seedling extraction/planting mechanism 17 plants the seedlings M on the inside of the machine body, and the seedling extraction/planting mechanism 18 plants the seedlings M on the outside of the machine body.

[0014] Seedling retrieval/planting mechanisms 17, 18
The seedlings M planted by the method can be planted in a staggered manner as shown in FIG. 5(a), and the planting intervals S of the seedlings M are equal. On the other hand, as shown in FIG. 5(b),
Seedlings m planted by a conventional rice transplanter at the same planting density as the seedlings M planted by the seedling retrieval/planting mechanisms 17 and 18 of the present invention have a vertical planting interval s that is greater than the planting interval S according to the present invention. It is narrow, and S>s. Therefore, the seedlings M planted according to the present invention are unlikely to have competition during the growth stage, and an increase in yield can be expected due to stable growth. As shown in FIG. 6, the seedling retrieval/planting device of the present invention has the rotation axis of the transmission body and the rotation axis of the seedling retrieval/planting mechanism arranged in parallel, so that the tip of the seedling retrieval/planting mechanism is , in combination with a conventional seedling retrieval/planting mechanism that moves along a plane trajectory C in the direction of movement of the aircraft, the seedlings M, m
It is also a good idea to plant them.

Furthermore, as shown in FIG. 7, the seedling retrieving/planting device of the present invention has a gear between the non-parallel rotating shaft 14 and the rotating shaft 15 (16) in place of the planetary gear 27 of the above embodiment. A planetary gear 27a is provided for transmitting rotation at an inconstant speed,
The intermediate gear 26 in FIG. 3 is omitted, and the thickness of the transmission body 13 is reduced. Such an inconstant velocity planetary gear 27
a by tilting the rotating shaft 15 (16) of the conical gear at a predetermined angle with the apex of the pitch cone as the origin, or
For example, it can be created using a gear cutter having the same shape as the intermediate gear 24 that is the meshing partner. As described above, although there are some difficulties in making the gear, it is possible to reduce the thickness of the transmission body 13 and to easily construct the transmission path, thereby configuring a seedling retrieval/planting device suitable for high-speed rotation. I can do it.

[0016]

[Effects of the Invention] As explained above, the three-dimensional trajectory seedling planting device of the present invention provides the following effects. ■ The rotation axis of the seedling retrieval/planting mechanism and the rotation axis of the transmission body are arranged so that they are not parallel, and the seedling retrieval/planting mechanism rotates around the rotation axis that is not parallel to the rotation axis of the transmission body. Since it oscillates at the same frequency, the tip of the seedling retrieval/planting mechanism draws a three-dimensional closed loop trajectory with a bulge in the lateral direction to the direction of movement of the machine, allowing seedlings to be taken out from the seedling retrieval port and planted in the field. I can do it. Therefore, the seedling planting position can be shifted laterally with respect to the seedling take-out port with respect to the machine traveling direction, and sets with different angles between the rotation axis of the seedling take-out/planting mechanism and the rotation axis of the transmission body can be combined. By attaching it to the transmission body, the seedlings taken out from one seedling outlet can be
It becomes possible to plant in two rows alternately. ■ A gear with a conical or almost conical pitch curved surface and a non-circular gear or eccentric gear that transmit rotation at an inconstant speed are installed in the transmission body to transmit power from the rotating shaft side to the rotating shaft side. Therefore, the seedling retrieval/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. Further, it is possible to attach to the transmission body a set in which the rotation axis of the seedling retrieval/planting mechanism and the rotation axis of the transmission body have different angles. ■ After planting the seedlings, if the direction in which the seedling extraction/planting mechanism escapes from the planted seedlings is lateral to the direction of movement of the aircraft, the seedling extraction/planting mechanism will not interfere with the planted seedlings. , it is possible to plant large seedlings compared to the size of the seedling take-out/planting mechanism. - The entire seedling planting section, including the seedling platform, can be arranged and configured horizontally with respect to the direction of movement of the machine body, making it possible to narrow the width of the machine body and reduce rolling, vibration, etc. of the machine body. ■
The seedlings can be planted, for example, in a staggered manner to make their growth uniform and to increase the planting density of the seedlings.

[Brief explanation of the drawing]

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

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

FIG. 3 is a sectional view of the three-dimensional trajectory seedling planting device.

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

FIG. 5(a) is a perspective view of a state in which seedlings are planted by the three-dimensional trajectory seedling planting device of the present invention, and FIG. 5(b) is a perspective view of a state in which seedlings are planted at the same planting density by a conventional rice transplanter.

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

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

[Explanation of symbols]

1 Passenger vehicle body 2 Front wheel 3 Rear wheel 4 Pilot seat 5 Steering handle 6 Lifting link 7 Seedling planting section 8 Seedling planting section main body 9 Float 10 Seedling platform 11 Seedling support plate 12 Seedling outlet 13 Transmission body 14 Rotating shafts 15, 16 Rotating shafts 17, 18 Seedling retrieval/planting mechanism 17a, 18
a Seedling removal/planting claws 17b, 18b Seedling planting fork 19 Fixed 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 Seedling Tip trajectory of the extraction/planting mechanism (claw) F Field M, m Seedling S, s Seedling planting interval

Claims (2)

[Claims] Claim 1: A transmission body that extends in a radial direction for a predetermined length from the center of rotation, facing the seedling take-out port for taking out the seedlings placed on the seedling stand, is connected to the shaft through a rotating shaft so as to rotate in one direction. A seedling retrieval/planting mechanism is attached to the tip of the transmission body via a rotating shaft, and the seedling retrieval/planting mechanism takes out the seedlings one by one from the seedling retrieval port and plants them in the field. In the planting machine, the rotation axis of the transmission body and the rotation axis of the seedling retrieval/planting mechanism are arranged non-parallel, so that the tip of the seedling retrieval/planting mechanism is oriented transversely to the direction of movement of the machine. A three-dimensional trajectory seedling planting device characterized by being configured to move by drawing a three-dimensional closed loop trajectory with a bulge. 2. A gear having a conical or nearly conical pitch curved surface, and a non-circular gear or an eccentric gear for transmitting rotation at an inconstant speed are provided in the transmission body, and 2. The three-dimensional trajectory seedling planting device according to claim 1, wherein power is transmitted to the three-dimensional trajectory seedling planting device.