JP3310477B2 - Rice transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of cutting out mat-type seedlings placed on a plurality of seedling mounting tables which reciprocate along the longitudinal direction of a sliding rail in a horizontal posture by a planting mechanism. A seedling planting device that performs an operation of planting in a field is connected to the rear end of the traveling body so as to be able to move up and down, and a center float in a center position in the left-right direction among a plurality of leveling floats provided in the seedling planting device. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice transplanter having a raising / lowering control means for driving and lowering a seedling planting device based on a grounding load on a surface, and more particularly to a technique for reducing the lateral dimension of the seedling planting device when not working.

[0002]

2. Description of the Related Art As a technique for reducing the lateral dimension of a seedling planting apparatus as described above, there is a technique disclosed in Japanese Utility Model Application Laid-Open No. 4-113523. By being configured to be freely foldable, it is possible to reduce the size of the seedling mounting table in the lateral direction by a folding operation at both ends of the seedling mounting table when not in operation.

[0003]

Since the size of the seedling planting device of the riding type rice transplanter is large in the lateral direction, the purpose is to avoid contact with obstacles on the ground when traveling on the road, or to mount the rice transplanter on a truck. For the purpose of storing rice transplanters within the width of the loading platform when loading and transporting, multi-row rice transplanters such as eight-row planting,
As in the conventional example, a device for reducing the size of the seedling plant in the lateral direction has been considered. However, in this conventional example, since only the both sides of the seedling mounting table are folded, for example,
In the case of a transmission system consisting of a chain case or the like that drives a planting mechanism, such as a 10-row seedling planting device, in which the size between the right and left ends is large, the left and right sides of the transmission system can be folded even if only both ends of the seedling mounting stand are folded. Since the distance between both ends cannot be reduced, there is room for improvement because the size cannot be reduced much.

[0004] Therefore, the whole seedling planting apparatus including the transmission system is configured so as to be able to be divided into two parts to the left and right, and by changing the posture of the divided parts around a suitable axis, the storage position is switched to reduce the lateral dimension. It is also conceivable to adopt a folding structure. However, the seedling mountings are large even in the divided state, and when switching to the storage position by a simple posture change such as a swing type, the divided seedlings at the time of the posture change come into contact with each other and hinder smooth storage. Can easily be considered.

Further, in the conventional seedling planting apparatus, the seedling planting apparatus is moved up and down based on the contact load of the center float at the center position in the left-right direction, and the level of the seedling planting apparatus with respect to the field scene is determined. In the case where the center float is arranged at the center position in the left-right direction of the seedling planting apparatus, the seedling planting apparatus is divided into two as described above, and the storage posture is adjusted. It is also conceivable to break the balance of the divided object at the time of the switching operation.

An object of the present invention is to provide a rice transplanter for minimizing the lateral dimension of a seedling planting device by a reasonable storing operation even in a seedling planting device for multiple planting.

[0007]

SUMMARY OF THE INVENTION As described at the beginning, the feature of the present invention is to cut out seedlings of a multi-row seedling mounting table which reciprocates along a sliding rail by a planting mechanism and plant them on a field. An ascending / descending elevator planting device that operates is connected to the rear end of the traveling machine so as to be able to move up and down, and also drives and raises and lowers the seedling planting device based on the ground load of the center float provided on the seedling planting device in the field scene. In a rice transplanter provided with a control means, the seedling planting device is configured to be splittable at an intermediate position in the left-right direction, and each split piece is rotated around a first axis center in a vertical position with respect to a frame member. The frame member is freely supported, and the frame member is rotatably supported on a member on the traveling body side around the second shaft center in the vertical position, so that the divided member is rotated in the horizontal direction around the first shaft center. The outer end is directed toward the front of the traveling body, and is pivoted around the second axis. The object is moved to the center position side in the left and right direction of the traveling machine so that the upper edge of each divided seedling mounting table can be switched to a storage posture in which the upper edges are parallel to each other in a close state, and the center float is moved to one side. Support for the split,
When the seedling placement device is switched to the storage position, the divided seedling placing table on the side of the divided material is provided with a movement permitting mechanism that allows an operation of moving to the outer end on the slide rail. The effects are as follows.

[0008]

According to the above features, when the seedling planting device is stored, the seedling planting device is divided, and the divided seedling rest of the divided member on the side supporting the center float is moved by the sliding rail by the movement permitting mechanism. After moving the upper part outward, each of the divided parts is rotated around the first axis, and at the same time, each frame member is rotated about the second axis, so that the lateral parts of the divided parts are rotated. The end is directed to the front direction of the traveling body, and the inner ends of the divided parts are moved in the direction toward the center position of the body in the left-right direction. Also, during this operation, one of the divided seedling mounts is displaced outward, so that the weight balance of the center float supported on the inner end and the divided seedling mounts with respect to the first axis is improved. This makes it possible to perform rotation while avoiding contact between the inner ends of the divided seedling mounting tables during rotation. Thereafter, the storage position can be set such that the upper edges of the divided seedling mounting tables are parallel to each other in a close state.

In other words, according to the present invention, when the seedling placement device is retracted, the divided seedling mounting stage of the divided member provided with the center float is deviated to the side opposite to the center float, thereby improving the balance of the divided member itself. At the same time, the size of the seedling plant in the left-right direction can be reduced by avoiding contact between the divided seedling mounting stands.

[0010]

Therefore, even in a seedling planting apparatus for multi-row planting, a rice planting machine configured to store the lateral dimension of the seedling planting apparatus small by a balanced and reasonable operation is constructed. It is.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, an engine 4 is mounted on a front part of a traveling body 3 provided with a driving type front wheel 1 and a driving type rear wheel 2 which are operated by a steering operation. Transmission 5 to which power from the engine 4 is transmitted, and a transmission case 6, a driving seat 7 is disposed at the center of the traveling body 3, and hydraulic pressure is applied to the rear end of the traveling body 3. A seedling planting apparatus A is connected via a link mechanism 9 driven up and down by a cylinder 8 to form a riding type rice transplanter.

The right side of the driver's seat 7 is provided with a raising / lowering lever 10 for controlling the raising and lowering of the seedling planting device A and the on / off operation of the planting clutch C. The continuously variable transmission is provided on the left side of the driver's seat 7. A shift lever 11 for operating the device 5 is provided.
Note that the planting clutch C is built in the transmission case 6, and the disengagement operation is performed only when the transmission shaft 12 that transmits power from the transmission gear 6 to the seedling planting device A is in a predetermined rotation phase. The planting arm (described later) of the seedling planting apparatus A is allowed to stop in a posture avoiding the posture in contact with the field.

The seedling placement apparatus A includes a seedling mounting table 13 on which a mat-shaped seedling W is placed, a pair of left and right transmission cases 14 and 14 to which power from the transmission shaft is transmitted, and a chain case 15 from the transmission case 14. A rotary case 16 that rotates with the power transmitted by the power transmission, a pair of planting arms 17 provided in the rotary case 16, and five leveling floats 18, respectively.
The planting arm 17 cuts out the seedlings one by one from the lower end of the mat-shaped seedling W placed on the seedling placing stand 13 at the time of work, and is planted in a field scene. At the same time as performing the operation, the fertilizer 19 supplies the fertilizer to the field scene near the planted seedling. still,
A planting mechanism is constituted by the rotary case 16, the planting arm 17, and a system for driving these.

As shown in FIG. 2 and FIG. 3, in this rice transplanter, the seedling transplanter A is positioned at a center position in the left-right direction, two by four.
It is configured so that it can be divided, and each divided object AL, AR,
With respect to a frame member 20 constituting the divided parts AL and AR, the frame member 20 is rotatably supported around a first axis X1 in a vertical position, and further, with respect to a main frame 21 provided at a rear end of the link mechanism 9. By supporting the frame member 20 so as to be rotatable around the second axis X2, the divided parts AL and AR are rotated around the first axis X1 in the lateral direction. The divided parts AL and AR are moved to the center position in the left-right direction of the traveling body 3 by turning the frame member 20 around the second axis X2 at the same time as moving the outer end toward the front side of the traveling body 3. Then, the left and right split seedling rests 13L, 13R
By switching to a storage position in which the upper edges of the two are parallel to each other in a close state, the size of the seedling plant A can be reduced in the lateral direction.

As shown in FIGS. 11 and 12, the leveling float 18 comprises a center float 18C at the center in the left-right direction and two side floats 18S # disposed on the left and right of the center float 18C. The apparatus includes a lifting / lowering control means (not shown) for driving the hydraulic cylinder 8 based on the grounding load of the center float 18C to set the level of the seedling planting apparatus A with respect to the field scene to a predetermined value. The center float 18C is supported on the right side of the divided parts AL and AR on the side of the divided part AR.

A vertical plate 23 is supported on a rolling boss 22 connected to the lower end of a vertical frame 9A supporting the rear end of the link mechanism 9 so as to freely roll around a rolling axis Y in a front-rear posture. As shown in FIG. 5, the upper plate 21A and the lower pipe 21
B is fixed to the main frame 21, and a round pipe is formed at both left and right ends of the main frame 21 so as to be rotatable with respect to a second shaft 24 disposed coaxially with the second axis X 2. The frame member 20 is rotatably supported around the second axis X2, and a first shaft 25 disposed coaxially with the first axis X1 at the outer end of each frame member 20, 20. , A square pipe-shaped support frame 27 is rotatably supported around the first axis X1 via a channel-shaped bracket 26, and the left and right transmission cases 14 and The chain case 15 is fixedly provided, and left and right sliding rails 28, 28 for supporting the seedling mounting table 13 are provided on the upper surfaces of the pair of chain cases 15, 15 of the divided parts AL, AR. .

A screw shaft 29, which is rotationally driven by the power of the left transmission case 14, is provided between the transmission case 14 and the bearing member 30 at the end of the support frame 27 on this side. A moving member 31 for transmitting the moving force of a frame (not shown) engaged with the spiral groove of the screw shaft 29 to the left divided seedling mounting table 13L is provided to constitute a lateral feed mechanism of the seedling mounting table 13. The seedling mounting table 13 is divided into left and right divided seedling mounting tables 13.
L and 13R are each a connecting member D (see FIGS. 11 and 12).
And reciprocate in the horizontal direction integrally on the slide rails 28 by the power from the lateral feed mechanism.

An output shaft 32 to which power from the power transmission shaft 12 is transmitted to the rolling boss 22 is freely rotatably supported on the rolling shaft center Y and the coaxial center. The power of the output shaft 32 is transmitted to a clutch. Mechanism 33, bevel case 34,
A transmission system for transmitting to the left and right transmission cases 14, 14 via the respective intermediate shafts 35 is formed. In addition, the clutch mechanism 33 includes two members 33A and 33B that are engaged only in a specific rotation phase.
(See FIG. 3) is configured to be separable and connectable by moving in the rolling axis Y direction.
Is equipped with a transmission system having a bevel gear (not shown) so as to split and output the power from the output shaft 32 into two systems. The intermediate shaft 35 is provided with universal joints at both ends and is configured to be refractible. It is provided with a spline fitting type expansion / contraction part so that it can expand and contract.

As shown in FIG. 7, the upper end of each of the first axis X1 and the second axis X2 is slightly inclined in the direction toward the front side of the traveling body 3 so that the divided seedling in the stowed state can be obtained. As shown in FIG. 16, the mounting stands 13L and 13R are changed to a posture toward the standing posture and stored (in a state where the respective divided seedling mountings 13L and 13R are close to each other). It is configured so that the size can be further reduced. FIG.
(A), (B), as shown in FIG. 5, the second shaft 24 is provided so as not to rotate with respect to the main frame 21, and the first shaft 25 is provided so as not to rotate with respect to the frame member 20. A main sprocket 36 is fixedly mounted on the upper portion of the second shaft 24 on the same axis as the second shaft center X2, and a plate-shaped turn is rotatably mounted on the upper end position of the second shaft 24 around the second shaft center X2. A moving member 37 is provided. In addition, the bracket 26 is rotatably supported with respect to the first shaft 25, rotates together with the bracket 26, and is １ ／ of the number of teeth of the main sprocket 38.
Are arranged coaxially with the first axis X1 and the main sprocket 36 and the driven sprocket 38
And the chain 39 is wound.

The left and right rotating members 37, 37 are arranged at a higher level than the left and right frame members 20, 20, respectively.
The frame members 20, 20 are connected and fixed via the rods 40, 40 in a suspended posture so as to rotate in conjunction with the rotational power of the frame members 20, and the left and right rotating members 37, 37 are rotated in opposite directions. They are connected by a rod-shaped link member L. Further, a sector gear 41 arranged coaxially with the second shaft X2 on the left side is fixed to the frame member 20 side, and a pinion gear 42 meshing with the sector gear 41 is attached to the main frame 21.
And an electric motor 43 for driving the pinion gear 42.

The ends of the rods 40, 40 are fixed to the rotating member 37 and the frame member 20 by welding, and the length is freely adjustable by interposing a turnbuckle 40A at an intermediate portion. Further, the rod 40 is formed in a straight line shape and is connected between the rotating member 37 and the frame member 20 in an inclined posture, so that the frame member 20 is suspended from the rotating member 37. Strength has been improved. As shown in FIG. 6, the link member L is formed by bending one end of a rod material 44, and is provided with a connecting piece 46 at the other end so as to be adjustable in position with a nut 45, and bending the one end. Part is inserted into the hole of one of the turning members 37 and connected rotatably around the axis in the vertical position.
The connecting piece 46 at the other end and the other turning member 37 are connected via a pin 47 so as to be rotatable around an axis in a vertical posture.

As shown in FIGS. 8 and 9 (a) and (b), a hole 28A formed on the upper surface of the slide rail 28, a lock piece 48 engaged with and disengaged from the hole 28A, and this lock piece 48 is formed at the lower end, and the divided seedling mounting table 13 on the right side is formed.
A locking mechanism R for preventing the lateral movement of the right divided seedling mounting table 13R is constituted by a rod 49 provided on the side of R so as to be vertically operable and a lever 50 for operating the rod 45 up and down. The mechanism R is provided when the seedling mounting table 13 (in which the left and right divided seedling mounting tables 13L and 13R are integrated) is located at the center of the left and right, and when the right divided seedling mounting table 13R is positioned at the right moving end. At each position, the right divided seedling mounting table 13R can be prevented from moving. or,
A center switch 52 and a side switch 53 are provided on the side of the slide rail 28 for detecting that the right divided seedling mounting table 13R is at these positions by contact with the protruding pieces 51 of the right divided seedling mounting table 13R. ing.

As shown in FIG. 10, a system for inputting signals of a storage switch 55, a restoration switch 56, the center switch 52, and the side switch 53 to a control device 54 having a microprocessor is formed.
An output system for outputting a control signal to each of the driver 57, the center lamp 58, the side lamp 59, and the buzzer 60 for controlling the electric motor 43 is formed. When the center switch 52 detects the seedling table 13, the center switch 52 is configured to perform control for switching the attachment device A to the storage position and control for restoring the seedling placement device A in the storage position to the working position. At the same time as turning on the lamp 58, the buzzer 60 is actuated for a short time.
Is detected, the control operation of turning on the side lamp 59 and simultaneously activating the buzzer 60 is performed.

With this configuration, when the seedling planting apparatus A is in the storage posture, the seedling planting apparatus A is first raised by the driving force of the transverse feed mechanism in a state where the seedling planting apparatus A is raised to a level away from the ground. The seedling mounting table 13 is sent to the center position side in the left-right direction, the center switch 52 detects the seedling mounting table 13, the center lamp 58 is turned on, and the horizontal feeding is stopped at the position where the buzzer 60 operates (in this state). (The position of FIG. 11 is reached). Thereafter, the connection of the connecting member D for connecting the left and right divided seedling rests 13L and 13R is released, the right divided seedling rest 13R is artificially moved to the right moving end, and the side switch 53 is turned on. When the divided seedling mounting table 13R is detected, the side lamp 59 is turned on and stopped at the position where the buzzer 60 operates, and further, an operation of fixing the right divided seedling mounting table 13R by the lock mechanism R is performed (in this state). And the divided seedling mounting table 13R is moved to the right by about 15 cm). The connection member D constitutes a movement permitting mechanism.

Next, the clutch mechanism 33 is artificially disengaged, a predetermined connection is released, the seedling planting apparatus A is switched to a state capable of being divided, and the electric motor 43 is driven by operating the storage switch 55. Then, the attitude of the left frame member 20 is changed by the driving force, and the second shaft is moved in a state where the respective frame members 20 and 20 are interlocked by the forces from the rotating members 37 and 37 and the link member L in accordance with the changed attitude. Core X2
Around X2, the outer end of the main sprocket 3 rotates toward the rear side, and at the same time, the main sprocket 3 is supported by the brackets 26, 26 around the first axis X1, X1.
6. The direction of the rotation of the frame members 20, 20 in the direction opposite to the rotation direction of the frame members 20, 20 at a speed twice the rotation speed of the frame members 20, 20 by the force from the driven sprocket 38 and the chain 39, that is, the left and right outer ends thereof 3 to the front side.

As a result, the divided objects AL and AR are the first
By rotating around the axis X1, the posture is changed in a direction in which the lateral outer ends of the divided parts AL and AR are directed toward the front side of the traveling body 3, and at the same time, the frame around the second axis X2. The rotation of the member 20 changes the position of the traveling body 3 toward the central position in the left-right direction, and as shown in FIG. 14, the upper end edges of the divided seedling placing stands 13L and 13R are parallel to each other in a close state. An operation of switching to the retracted posture is performed. At the time of this rotation, the center float 18C is supported on the right divided object AR, and although the weight of the center float 18C acts on the inner end side of the divided object AR, the divided seedling mounting table is mounted. 13R moves to the side opposite to the center float 18C, thereby enabling rotation of the divided object AR in a state where the weight balance is improved.

Further, as shown in FIG. 13, at the time of rotation in the storage direction, although the upper corner portions 13E and 13E of the left and right divided seedling mounts 13L and 13R approach each other, the divided seedling mounts in plan view. 13L and 13R rotate in a state where they are offset from each other, so that rotation can be made while avoiding contact of the respective corners 13E and 13E.
This rotation and the expansion and contraction of the intermediate shaft 35 allow this rotation, and the operation of the electric motor 43 is automatically stopped when the seedling-planting device A reaches the storage position shown in FIG. Without).

Thereafter, the lock of the lock mechanism R is released and the right divided seedling placing table 13R is artificially moved to the position shown in FIG. 15, whereby the storage is completed.
In this storage position, the transmission system of the bevel case 34, the intermediate shaft 35, and the transmission case 12 is not separated as shown in FIG. 3, and only the clutch mechanism 33 is separated. When viewed from the rear of the body 3 as shown in FIG. 16, as shown in FIG. 16, in a state where the divided seedling mounting stands 13L and 13R are each approaching the standing posture, the upper edges thereof are extremely close to each other. It is something to do.

When restoring the seedling placement apparatus A in the storage position to the working position, the right divided seedling mounting table 13R is moved to the position shown in FIG. The restoring operation of the control device 54 is permitted in a state where the divided seedling placing table 13R is detected. When the restoring switch 56 is operated in this state, the electric motor 43 rotates in the reverse direction, and the divided objects AL and AR move in the opposite direction as described above. As a result of the rotation, the seedling transplanting device A in the retracted posture is operated by the operation reverse to the above.
Performs a posture change toward the working posture, and when the planting device A reaches the posture shown in FIG.
3 is stopped (the control operation is not described in detail) and the restoration is completed. In this state, the clutch mechanism 33 is connected, the right divided seedling mounting table 13R is moved to the center position, and the divided seedling mounting table 1 is moved.
When the 3L and 13R are connected to each other by the connecting member D, a workable state is reached.

[Another Embodiment] The present invention provides, in addition to the above embodiment,
For example, it is possible to support the center float on the side provided with the lateral feed mechanism, and it is also possible to apply the present invention to a seedling planting apparatus for 10 or more rows.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is an overall side view of a rice transplanter.

FIG. 2 is a plan view of a transmission system of the seedling plant.

FIG. 3 is a plan view of a transmission system of the seedling planting device in a stowed position;

FIG. 4A is a plan view of an operation system using a link member. FIG. 4B is a plan view of an operation system using a link member in a retracted posture.

FIG. 5 is a rear view of a main frame and a frame member with a partially cutaway view.

FIG. 6 is a rear view showing a link member.

FIG. 7 is a side view showing a posture of a first shaft center and a second shaft center.

FIG. 8 is a plan view of an end of a sliding rail showing an arrangement of switches and the like.

9A is an overall side view of the lock mechanism, and FIG. 9B is an enlarged side view of a main part of the lock mechanism.

FIG. 10 is a block circuit diagram of a control system.

FIG. 11 is a plan view of a rice transplanter in a state where the seedling planting device is set to a working posture.

FIG. 12 is a plan view of a rice transplanter in a state where a seedling mounting table is divided.

FIG. 13 is a plan view of the rice transplanter in a state where the seedling planting device is divided and turned.

FIG. 14 is a plan view of the rice transplanter in a state where the turning of the divided parts of the seedling planting apparatus has been completed.

FIG. 15 is a plan view of the rice transplanter in a state where the end positions of the divided seedling mounting table are aligned.

FIG. 16 is a rear view of the seedling planting device in a stored state.

[Explanation of symbols]

 Reference Signs List 3 traveling machine 13 seedling rest 13L, 13R split seedling rest 18 leveling float 18C center float 20 frame member 28 sliding rail A seedling planting apparatus AL, AR split W matted seedling X1 first axis X2 second axis core

────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-6-245614 (JP, A) JP-A-4-66018 (JP, A) JP-A-2-12208 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) A01C 11/02 A01B 73/06

Claims (1)

(57) [Claims] A mechanism for planting mat-type seedlings (W) seedlings placed on a multi-row seedling mounting table (13) that reciprocates along a longitudinal direction of a sliding rail (28) in a horizontally long posture. A seedling planting device (A) for cutting and planting in a field is connected to the rear end of the traveling body (3) so as to be able to move up and down, and a plurality of leveling floats provided in the seedling planting device (A). (18) A rice transplanter comprising lifting / lowering control means for driving and raising / lowering the seedling planting apparatus (A) based on a ground contact load with respect to a field scene of a center float (18C) at a center position in the left-right direction, The seedling-planting device (A) is configured to be splittable at an intermediate position in the left-right direction, and each of the splits (AL) and (AR) is placed in a vertical position with respect to the frame members (20) and (20). One axis (X1), rotatably supported around (X1),
The frame members (20), (20) are rotatably supported around the second shaft cores (X2), (X2) in the vertical orientation by members on the traveling machine body side, so that the first shaft center (X1). , (X1)
By turning around, the lateral outer ends of the divided parts (AL) and (AR) are directed toward the front side of the traveling body (3), and the divided parts (AL) and (AR) are turned around the second axis cores (X2) and (X2). Divided by motion (AL),
(AR) is moved to the center position side in the left-right direction of the traveling body (3), and the divided seedling mounting tables (13L) and (13R) are respectively moved.
The center float (18C) is supported on one of the divided parts, and the seedling planting device (A) can be switched to the storage position. A rice transplanter having a movement permitting mechanism that allows the divided seedling placing table on the side of the divided material to move to the outer end on the sliding rail at the time of switching.