JPH1052132A - Rice transplanter - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To efficiently perform a switching operation to a storage posture of a seedling-planting apparatus configured to be capable of changing the posture. SOLUTION: A seedling planting device A provided in a traveling machine body 3 is configured so as to be able to be divided at a center position in the left-right direction, and the seedling planting device A is provided with a working posture enabling a seedling planting operation and a divided object. The connecting mechanism S for holding the left and right divided parts in the working posture is configured by switching the posture of the seedling planting device A to the retracted posture in which the lateral dimension is reduced by changing the posture around the vertical axis of the traveling machine body. 3 and a rear position of the seedling plant A, which can be operated by an operator who has boarded the vehicle 3, and the connecting mechanism S at this rear position.
Is provided from the traveling body 3 side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seedling planting device provided on a traveling machine body, which can be divided at a central position in the left-right direction, and which enables the seedling planting plant to perform seedling planting work. The present invention also relates to an improvement of a rice transplanter which is configured to be capable of switching a seedling planting device to a retracted posture in which a lateral dimension is reduced by changing a posture of a divided product around a vertical axis.

[0002]

2. Description of the Related Art Conventionally, there is a rice transplanter constructed as described above as disclosed in Japanese Patent Application Laid-Open No. 8-130936. In this conventional example, a seedling planting apparatus is configured to be separable into left and right divided parts. At the same time, the divided object is configured to be switchable between a storage position and a working position by driving the electric motor.

[0003]

Further, as in the prior art,
Even if the divided parts are switched between the working position and the retracted position by driving the electric motor, the relatively large and complicated structure of the seedling planting device is configured to be able to be divided. It is necessary to provide a plurality of connecting mechanisms that can be switched between a state in which the connecting mechanism is separated from the state in which the connecting mechanism is separated. However, assuming that the divided part of the seedling planting apparatus is provided with a plurality of coupling mechanisms, for example, when switching the seedling planting apparatus from the working posture to the storage posture, the worker descends from the airframe to the ground and There is room for improvement in terms of not only requiring time to operate the lock mechanisms at various positions of the planting device from a predetermined position but also causing the operator to feel troublesome.

[0004] An object of the present invention is to rationally configure a rice transplanter capable of efficiently performing a switching operation of a seedling transplanter configured to be able to switch the attitude to a stored attitude with high efficiency.

[0005]

According to a first aspect of the present invention, as described at the outset, a seedling planting device provided on a traveling machine body is configured to be splittable at a center position in the left-right direction. At the same time, the seedling planting device can be freely switched between a working posture that enables seedling planting work and a storage posture that reduces the lateral dimension of the seedling planting device by changing the posture around the vertical axis of the divided material. In the rice transplanter configured as described above, the connecting mechanism for holding the left and right divided parts in the working posture is disposed at a front position where an operator who is on the traveling body can operate, and a rear position of the seedling planting device, There is a drive operating means for releasing the connection mechanism at the rear position, and the operation is as follows.

A second feature (claim 2) of the present invention resides in that an actuator for switching the divided object to the storage position is provided, and the operation is as follows.

[0007] A third feature of the present invention (claim 3) is that at least one of the connection mechanisms switches to a connection state in conjunction with a switching operation from a storage posture of the divided object to a working posture. It is configured in a mold, and its operation is as follows.

According to the first feature, when the seedling planting device is switched to the storage position, the operator manually operates the connecting mechanism at the front position of the seedling planting device from the position of the driver's seat. By performing the release operation and performing the release operation of the connection mechanism at the rear position of the seedling planting device via the driving operation means, it is possible to switch the seedling planting device to the storage position. In other words, when switching the seedling planting device from the working position to the stowed position, the operator releases the connection mechanism of a portion that can be operated from the driver's seat,
Further, even if the operator does not operate the rear connection mechanism of the seedling planting device from the position of the rear portion of the seedling planting device, for example, it is sufficient to operate only switches provided on the body. It is not necessary to go down to the ground to perform the release operation of all the coupling mechanisms.

According to the second feature, after the release operation of the coupling mechanism is performed, it is possible to switch to the retracted position by the driving force of the actuator, and the operator only needs to operate the switch for operating the actuator. .

According to the third feature, when restoring the seedling transplanting device that has been switched to the storage position to the working position, it is only necessary to restore the divided planting device from the storage position to the working position. At least one connecting mechanism is automatically switched to the connecting state, so that there is no need for the operator to manually perform the connecting operation.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a drive-type front wheel 1 and a drive-type rear wheel 2 that are steered.
The engine 4 is mounted on the front part of the traveling body 3 provided with the vehicle, and the hydrostatic stepless transmission 5 and the transmission case 6 are arranged at the front part of the traveling body 3 to transmit the power from the engine 4. In addition, the driver's seat 7 is arranged at the center of the traveling body 3, and the seedling planting apparatus A is connected to the rear end of the traveling body 3 via a link mechanism 9 driven up and down by a hydraulic cylinder 8 for riding. Configure a rice transplanter of the type.

The right side of the driver's seat 7 is provided with a raising and lowering lever 10 for controlling the raising and lowering of the seedling planting apparatus A and the on / off operation of a planting clutch (not shown). The transmission lever 1 for operating the continuously variable transmission 5
1 is provided. The planting clutch is built in the transmission case 6, and the transmission case 6
The cutting operation is allowed only when the power transmission shaft 12 that transmits power to the power is in a predetermined rotation phase, and the planting arm (described later) of the seedling planting apparatus A supplies power in a posture avoiding contact with the field. It is configured to shut off.

The seedling placement apparatus A places the mat-shaped seedlings W thereon, and the seedling mounting table 13 has an upper end inclined toward the front side of the traveling machine body 3, and the right and left to which the power from the transmission shaft 12 is transmitted. A pair of transmission cases 14, 14, this transmission case 14
A rotary case 16, which is rotated by power transmitted from the vehicle via a chain case 15, a pair of planting arms 17 provided in the rotary case 16, and a plurality of leveling floats 18, each of which is configured for eight-row planting. . In addition, the seedling mounting table 13 is supported so as to be reciprocally movable in the left-right direction with respect to a sliding rail 19 (see FIG. 3) in a horizontally long posture.

As shown in FIG. 2 and FIG.
Is a top link 9T and a pair of left and right lower links 9L, 9
The rear end of each L is connected by a vertical link 9V, and the seedling planting apparatus A is connected to the vertical link 9V via a detachable intermediate frame 21 (the structure of attachment and detachment is not described in detail). , The rolling boss 2 at the lower end of the intermediate frame 21
The seedling planting apparatus A is connected and supported so as to freely roll around a rolling axis Y in the front-rear posture with respect to 2, and is operated laterally by the driving force of an electric rolling motor 23 with respect to the intermediate frame 21. A tension member having an extension member 26 that is bent and connected to the inner end between the movement member 24 and the columnar frames 25, 25 disposed at the left and right positions of the seedling mounting table 13. A pair of left and right engaging rods 28 and 28 fixedly provided on the upper surface of the intermediate frame 21 and a pair of left and right engaging rods 28 and 28 provided on the upper surface of the intermediate frame 21. A tension type return spring 31 having an extension rod 30 connected to the inner end is interposed between the brackets 29 and 29. An operating shaft 32 projecting upward is welded and fixed to the right one of the extension rods 30, 30 of the left and right return springs 31, 31, and the inner end of the extension rod 30 is operated by the operation shaft 32. It is engaged so that it can be artificially removed from the engagement rod 28.

As shown in FIGS. 2 to 4, in this rice transplanter, the seedling planting device A is divided into four sections at the center position in the left-right direction, so that the left divided object AL and the right divided object AR are separated. It is configured to be splittable. That is, the rolling boss 2
2 and an upper plate 36A and a lower frame 36B connected to a plate 35 rotatably connected to
And a pair of right and left regulating arms 37, 37 extending forward from the main frame 36. The regulating arms 37, 37 are moved right and left when the seedling planting apparatus A is raised. The lower link 9L, 9L is configured to contact with the lower surface of the lower link 9L to restrict the rolling operation of the seedling planting apparatus A. In addition, a first shaft 38 is disposed at both end positions of the main frame 36 with a first shaft core X1 in a vertical orientation and a coaxial center,
A frame member 40 is provided via a cylindrical shaft 39 which is swingable around the first axis X1. The frame member 40 swings at the swinging end of the frame member 40 coaxially with the second axis X2 in the vertical position. The bracket 41 is freely provided, the column-like frame 25 is provided on the bracket 41 on the second axis X2 and the same axis as the bracket 41, and the square pipe-shaped tool frame 42 on the bracket 41 and the transmission The case 14 is connected and supported, and further, the front end of the chain case 15 is supported with respect to the tool frame 42.
5 is connected to the left and right support frames 43, 43 arranged in the horizontal position on the side opposite to the seedling mounting surface of the seedling mounting table 13, so that the left and right splits AL, AR of the seedling planting apparatus A are connected. I support it.

As shown in FIGS. 2, 3, 8A and 8B, the bevel case 44 to which the power from the transmission shaft 12 is transmitted via the intermediate shaft 12A is connected to the rolling shaft center Y.
The bevel case 44 is disposed at a position displaced further to the right.
Between the output shafts 45, 45 and the left and right transmission cases 14, 14, and an intermediate shaft 46, 46 having a universal joint.
This clutch mechanism is composed of a shift member 47 which is spline-fitted slidably with respect to the output shaft 45, an engaging member 48 fixed to the end of the intermediate shaft 46, and a shift member. 47 is biased in the direction of the occlusal member 48, and includes an occlusal claw 47 A formed on the shift member 47 and an occlusal claw 48 formed on the occlusal member 48.
A is configured to engage only with a specific rotation phase. Further, the shifter 5 which can be operated to contact the respective shift members 47, 47 so that the left and right shift members 47, 47 are simultaneously operated inward to simultaneously disengage the left and right clutch mechanisms.
And a link member 52 for simultaneously operating the shifters 50, 50, and a clutch release lever 53 for disengaging the clutch mechanism. In preparation for the upper end position of
The clutch release lever 53 and the link member 52 are linked via a wire 54.

As shown in FIG. 3, the moving force of a top (not shown) engaged in the spiral groove of the screw shaft 55 driven by the power of the left transmission case 14 is applied to the left divided seedling mounting table. 13
A lateral moving mechanism for the seedling mounting table 13 is provided with a moving member 56 connected to and conveyed to the anti-seedling mounting surface side of L. A protection frame 57 having a shape surrounding the outer end of the slide rail 19 is connected and fixed to the outer end of the tool frame 42 so as to protect the outer end of the slide rail 19. When the divided seedling mounting tables 13L and 13R are connected by a connecting mechanism described later, the divided seedling mounting tables 13L and 13R reciprocate in the horizontal direction integrally on the sliding rails 19 and 19 by the power from the transverse feeding mechanism.

As shown in FIGS. 5 to 7, the first shaft 3
8, a main sprocket 60 is fixedly mounted on the first shaft 38 at the upper end of the first shaft 38, and a plate-shaped rotating member 61 is rotatable around the first shaft X1 at the upper end of the first shaft 38.
And also rotates integrally with the columnar frame 27, and
A driven sprocket 62 having half the number of teeth of the main sprocket 60 is arranged coaxially with the second axis X2, and a chain 63 is wound over the main sprocket 60 and the driven sprocket 62. is there. Also, the left and right rotating members 61, 61 are respectively disposed at a higher level than the left and right frame members 40, 40, and the other ends of the rods 64, 64 having one ends fixed to the rotating members 61, 61 by welding. An operation rod 65 is arranged between the frame members 40 and 40 so as to be connected and fixed to the frame members 40 and 40 in a screw manner, and rotate the left and right rotating members 61 and 61 in opposite directions. Also, cylindrical shaft 3
9, a sector gear 66 is fixedly provided, and an electric motor 68 as an actuator for driving a pinion gear 67 meshing with the sector gear 66 is supported on the side of the main frame 36.
The posture of the frame members 40, 40 can be switched by driving the electric motor 68 in the forward and reverse directions.

As shown in FIGS. 9 to 11, round pipe-shaped engaging members 70, 70 are connected and fixed to the front positions of the left and right tool frames 42, 42 in a laterally long posture, respectively. Lock members 72, 72 are connected and fixed in such a manner as to project rearward from the left and right positions of a shaft 71, which is swingably supported in a horizontal position on 36B. On the upper surface side of the lock member 72, a concave engagement portion 72A that engages with the engagement member 70 from below is formed, and a spring 73 that swings the lock member 72 in the lock direction is provided. A lock release lever 74 for simultaneously operating the lock member 72 in the release direction is provided at the upper end position of the intermediate frame 21, and the lock release lever 74 and the lock member 72 are linked via a wire 75.

As shown in FIG. 2, when the seedling planting apparatus A is in the working posture, in order to maintain this working posture, the first connecting mechanism S1 is placed at an upper position on the anti-seedling placing surface of the seedling placing stand 13. Formed at the connecting position of the support frames 43, 43.
A connecting mechanism S2 is formed, and a third connecting mechanism S3 is formed between the lower surfaces of the left and right sliding rails 29, 29, as shown in FIG. 4th
A coupling mechanism S4 is provided. Also, these connecting mechanisms S1
To S4 correspond to the connecting mechanism S of the first aspect.

As shown in FIGS. 12 and 13, the first connecting mechanism S1 is provided on one side of an outer surface of a cover 78 which covers a guide member 77 disposed on the side opposite to the seedling mounting surface of the seedling mounting table 13. The joint piece 79 is configured as a buckle type that is pulled by the operation of the arm 80 on the other side and is held in an engaged state. As shown in FIG. With the axes of the frames 43 and 43 aligned, the engagement piece 79 on one side is connected to the arm 80 on the other side.
As shown in FIG. 15, the third connecting mechanism S3 has a nut 82 and a guide pipe 83 with respect to the lower surface of one of the slide rails 19 as shown in FIG. Screw body 8 that is provided with a bracket 84 that is screwed into the nut 82 with the lower surface of the other slide rail 19.
5 and an electric motor 8 for driving the screw body 85 in the forward and reverse directions
6 and a bracket 88 having a positioning pin 87 inserted into the guide pipe 83. The nut 82 and the screw body 85 are formed in a state where the positioning pin 87 is inserted into the guide pipe 83 and the position is determined at the time of connection. The connection state is maintained in a state where the respective brackets 84 and 88 are pulled together by screwing with them.

As shown in FIGS. 16 to 18, the fourth connecting mechanism S4 is swingable about a lateral support shaft 90 with respect to one plate 89 supported on the dividing surface of one of the divided seedling mounting tables. A supported lock piece 91, a spring 92 for urging the lock piece 91 toward the lock side, and an electric motor 94 for operating the lock piece 91 in the unlocking direction via a link member 93.
And a rubber contact member 95 protruding to the side of the division surface, and an engagement provided with a plate 96 supported on the division surface of the other divided seedling mounting table via a buffer spring 97 so as to be able to move back and forth. At the time of locking, as shown in FIG. 17, the head of the engaging member 98 is engaged with the concave cutout portion 91A of the lock piece 91 to lock the left and right divided seedling rests 13L, 13R.
When the separation of the divided seedling mounts 13L and 13R is prevented by separating the seedlings from each other, the lock member 91 is operated around the support shaft 90 in the unlocking direction by driving the electric motor 94, so that the engagement member 98 and the lock member The engagement with 91 is released.

As shown in FIGS. 1 and 19, the control case 100 near the driver's seat 7 includes a third connecting mechanism S.
A release switch 101 for operating the third and fourth coupling mechanisms S4 and the respective electric motors 86 and 94 to release the coupling;
A storage switch 102 for driving the electric motor 68 on the side for switching the divided objects AL and AR to the storage posture,
The electric motor 68 is mounted on the side for switching L and AR to the working posture.
And a connection switch 104 for driving the electric motor 86 of the third connection mechanism S3 to the connection side.
And

With such a configuration, when the seedling planting device A is stored, the seedling planting device A is raised to the upper limit by the extension operation of the hydraulic cylinder 9 and the leveling float 18 is moved as shown in FIG. In a state where the planting plant is switched to a state where the planting plant is not brought into contact with the ground, the seedling planting device A is operated by the operation of engaging the planting clutch, and FIG.
As shown in FIG. 1, the seedling table 13 is sent to the left end position by the driving force of the lateral feed mechanism and stopped, and the operator operates the operating shaft 32 of the extension rod 30 of the right return spring 31 from the traveling machine body 3 side.
Is manually operated to separate the inner end of the extension rod 30 from the engagement rod 28. Incidentally, the operation of manually operating the operation shaft 32 of the extension rod 30 of the right return spring 31 to separate it from the engagement rod 28 can easily perform the manual movement operation of the right divided seedling mounting table 13R performed later. To do that.

Next, the operator separates the first connecting mechanism S1 and the second connecting mechanism R2 from the side of the traveling body 3 and operates the clutch release lever 53 to the release position. Hold the position (holding structure is not detailed)
By operating the lock release lever 74 to the release position and holding the operated position (the holding structure is not described in detail), the release switch 1
01 ON operation, the third connection mechanism S3, the fourth connection mechanism S4
Is operated separately. When the clutch release lever 53 is operated to the release position, as shown in FIG.
7 and the occlusal member 48 are completely separated from each other, and the division A to be performed later is performed.
When the lock release lever 53 is operated to the release position without hindering the rotation operation of the L and AR, the lock member 72 is separated from the engagement member 70 as shown in FIG. , AR can be rotated.

Thereafter, as shown in FIG. 22, the operator artificially moves the right divided seedling mounting table 13R from the side of the traveling machine body 3 to the right end to move on the sliding rail 19. It is blocked by a lock means (not shown) (in this state, the interval between the left and right divided seedling mounts 13R and 13L reaches about 30 cm), and then the storage switch 102 is turned ON to thereby obtain the divided AL. , AR split seedling mount 13L,
13R is rotated in a direction toward the front side of the traveling body 3 and the left and right rotating members 6
1, 61, the swinging ends of the left and right frame members 40, 40 around the first axes X1, X1 are turned toward the rear of the traveling body 3 by forces from a pair of operation rods 65 (see FIG. 6). As a result, the swing end moves toward the center of the traveling body 3 in the left-right direction, and at the same time, the second axis X2, X2
The system supported by the brackets 41, 41 around the circumference 2 is the rotation speed of the frame members 40, 40 due to the force from the main sprocket 60, the driven sprocket 62, and the chain 63.
As a result, the frame members 40, 40 are rotated with respect to the main frame 36 at a double speed in a direction opposite to the rotation direction of the frame members 40, 40, that is, the left and right outer ends rotate toward the front of the traveling body 3. 90 degrees, and the frame members 40, 40
Then, the divided objects AL and AR rotate 180 degrees to reach the storage posture.

When rotating to the storage position, as shown in FIG. 30, the upper corners 13E and 13E of the left and right divided seedling mounts 13L and 13R approach each other, but the divided seedling mounts in plan view. 13L and 13R rotate at positions separated from each other, so that rotation can be made while avoiding contact between the respective corners 13E and 13E. By the way, in this storage posture, the force for rotating the divided objects AL and AR acts on the electric motor 68 for posture switching, and when the seedling planting apparatus A is maintained in the storage posture for a long period of time. It is also possible to attach a position regulating member for determining the relative position between the left and right divided objects AL and AR.

When restoring the seedling planting apparatus A in the stored position to the working position, the operator operates the restoring switch 103 with the unlocking lever 74 restored to the locked position from the side of the traveling machine 3. By turning on, the left and right divided objects AL and AR are rotated in the restoration direction by the driving force from the electric motor 68, and this rotation causes the divided object A to rotate.
When L and AR are restored to the working posture, the left and right engaging members 70 are restored.
And the left and right locking members 72, 72 simultaneously reach the engaged state, and automatically reach the locked state by the urging force of the spring 73. When the connection switch 104 is turned on in this state, the nut 82 and the screw body 85 are screwed together by the driving of the electric motor 86 of the third connection mechanism S3.
Reaches the connected state. Thereafter, the clutch mechanism is brought into the connected state by restoring the clutch release lever 53 to the ON position.

Thereafter, the fourth connecting mechanism S4 automatically reaches the connected state by artificially moving the right divided seedling mounting table 13R to the left divided seedling mounting table 13L. In this connection, after the head of the engaging member 98 comes into contact with the lock piece 91 to rotate the lock piece 91 around the support shaft 90 against the urging force of the spring 92, the engagement state is automatically set. And the connected state can be maintained. Next, from the side of the traveling machine body 3, an operator operates the second connecting mechanism S2 to connect the first connecting mechanism S1, and connects the extension rod 30 of the right return spring 31 in the separated state to the engaging rod 28.
By performing an operation of engaging with the seedling, the seedling planting apparatus A is restored to the working posture and reaches a workable state.

As described above, according to the present invention, the operator operates the connecting mechanism arranged on the front side of the seedling planting apparatus A from the side of the traveling machine body 3 and the hand of the operator such as the rear side of the seedling planting apparatus A. When the seedling planting apparatus A is switched to the retracted position, the worker can go down from the traveling machine body 3 to the ground by configuring the connection mechanism in a location where the vehicle cannot reach by the driving force of the electric motors 86 and 94. The connection of all the connection mechanisms can be released while the vehicle is still on the traveling body 3, and after the connection is released in this manner, the seedling-planting apparatus A is brought into the retracted posture by driving the electric motor. It can be switched. Further, after the seedling planting device A is switched to the retracted position, the electric motor 6
8, the seedling placement apparatus A can be restored to the working posture by such a driving force. When the restoration is performed in this manner, the right divided seedling placing stand 13R is brought into contact with the left divided seedling placing stand 13L. By operating up to the position where the divided seedlings are placed,
R automatically reach the connected state, and the electric motor 86
, The slide rails 19 can be connected to each other, and the operation can be switched to a workable state by performing a connection operation of the remaining connection mechanism from the traveling body 3 side.

[Other Embodiments] In the present invention, in addition to the above-described embodiment, for example, the fourth connecting mechanism for connecting the sliding rails in the above-described embodiment may be configured to perform automatic connection. It is possible to use an electromagnetic solenoid, an air cylinder, or the like as an actuator for releasing the connection of the connection mechanism.

[0032]

As a result, a rice transplanter capable of efficiently performing the switching operation of the seedling transplanting device, which is configured to be able to switch the posture, to the storage position without causing the operator to feel troublesome, is rationalized. (Claim 1). Further, switching to the storage position without burdening the operator is performed (claim 2), and when switching the seedling planting device from the storage position to the work position, the operator has to manually operate the lock mechanism. This can be reduced (claim 3).

[Brief description of the drawings]

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

FIG. 2 is a front view of the seedling planting apparatus.

FIG. 3 is a plan view of the seedling planting apparatus in a working posture.

FIG. 4 is a plan view of the seedling planting device in a storage posture.

FIG. 5 is a rear view of a storage operation system of the seedling planting apparatus.

FIG. 6 is a plan view of a storage operation system of the seedling planting apparatus.

FIG. 7 is a plan view of a storage operation system of the planting apparatus in a storage position.

FIG. 8 is a rear view of the clutch mechanism in the on state and the off state.

FIG. 9 is a plan view showing an arrangement of a lock member.

FIG. 10 is a side view showing an unlocked state and a locked state of the lock member.

FIG. 11 is a side view of an operation system of a clutch mechanism and a lock member.

FIG. 12 is a front view of a first coupling mechanism.

FIG. 13 is a sectional view of a first coupling mechanism.

FIG. 14 is a partially cutaway front view of the second coupling mechanism.

FIG. 15 is a longitudinal rear view of the third connection mechanism.

FIG. 16 is a side view of a fourth connection mechanism.

FIG. 17 is a longitudinal rear view of the fourth connection mechanism.

FIG. 18 is a cross-sectional plan view of the fourth connection mechanism.

FIG. 19 is a plan view of a control case.

FIG. 20 is a side view of the rear part of the rice transplanter with the seedling planting device raised.

FIG. 21 is a plan view of a rice transplanter in a state where a seedling mounting table is positioned at an end of a slide rail.

FIG. 22 is a plan view of a rice transplanter in a state where a seedling mounting table is divided.

FIG. 23 is a plan view of a rice transplanter obtained by dividing and turning a seedling planting device.

FIG. 24 is a plan view of a rice transplanter in which the seedling-planting device is set in a retracted position.

[Explanation of symbols]

 3 Traveling body 68 Actuator A Seedling plant AL, AR Split S Connection mechanism

Claims (3)

[Claims] 1. A seedling planting device provided on a traveling machine body is configured to be splittable at a center position in the left-right direction, and the seedling planting device is provided with a working posture for enabling seedling planting work, and a vertical position of the divided product. A rice transplanter configured so that the seedling planting device can be freely switched to a storage position in which the lateral dimension is reduced by changing the position around the axis, and a coupling mechanism that holds the left and right divided parts in a working position. A rice transplanter having drive operation means disposed at a front position where an operator riding on a traveling machine body can operate and a rear position of a seedling planting device, and for releasing a connection mechanism at the rear position. 2. The rice transplanter according to claim 1, further comprising an actuator for switching the divided object to a storage posture. 3. The rice transplant according to claim 1, wherein at least one of the coupling mechanisms is of an automatic coupling type that switches to a coupling state in conjunction with a switching operation from a storage posture of the divided object to a working posture. Machine.