JPH06296407A - Seedling transplanter - Google Patents

Abstract

PURPOSE:To provide a seedling transplanter having right and left seedling holding parts at the outermost right and left sides of a seedling holding table of a seedling planting apparatus in a state to enable proper folding and housing of the holding parts. CONSTITUTION:The seedling transplanter has a seedling planting apparatus 24 attached to a riding mobile machine body 1 through a link mechanism 22 in a state freely movable in vertical direction. The right and left seedling holding parts 32b, 32b at the outermost right and left sides of the seedling holding table 32 of the seedling planting apparatus 24 are constructed to be freely foldable to take a housing posture. In the seedling transplanter having the above structure, the right and left seedling holding parts 32b, 32b are made to be foldable exclusively when the seedling holding table 32 is positioned at or near the center of the machine body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seedling planting machine.

[0002]

2. Description of the Related Art As a conventional technology of this kind,
As disclosed in Japanese Utility Model Publication No. 60-2727, there is a riding-type rice transplanter in which the outermost right and left outermost seedling mounting bases and the end portions of the seedling receiving plates are folded and housed to reduce the body width. However, in the above, there is no idea to regulate the timing of folding and storing the outer seedling mounting table and the end portion of the seedling receiving plate, and it can be performed at any time. Therefore, the operator must confirm that the seedling mounting table is in the center position of the machine, but the rice planting work is very busy and often neglects to confirm it, depending on the machine configuration. The members and the drive system may be damaged. In addition, when the machine has multiple threads and becomes large in size, it is difficult for an operator to visually confirm that the seedling table is in the center, and the above error is likely to occur.

[0003]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, the present invention provides a seedling planting device 24 mounted vertically on a riding type traveling vehicle body 1 via a link mechanism 22.
Left and right outermost left and right seedling mounting portions 32b, 32b of the seedling mounting table 32 of
In the seedling planting machine configured to be folded and stored freely, the left and right outermost left and right seedling placement sections 32b, 32b are configured to be folded and stored only when the seedling placement table 32 is located at the center or substantially the center of the machine body. It was an opportunity.

[0004]

Since the present invention is configured as described above, the seedling mount 32 of the seedling planting device 24 is used when moving from one field to another, loading on a truck, or storing in a barn. When the left and right outermost left and right seedling placing sections 32b, 32b are folded and stored, the folding and storing can be performed only when the seedling placing table 32 is located at the center or substantially the center of the machine body, so that the operator is busy The intended storage work can be properly performed without much care, and the problems of the conventional example can be solved.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A 9-row planting type rice transplanter according to an embodiment of the present invention shown in the drawings will be described. The reference numeral 1 designates a riding type traveling vehicle body, in which an engine 4 is mounted on the rear upper surfaces of the left and right frames 2 and 3 constituting the body, and a traveling mission case 5 is provided in front of the left and right frames 2 and 3. Further, the traveling mission case 5 has a transmission mechanism in which the rotational driving force of the engine 4 is changed by the transmission lever 6, a front wheel differential mechanism, and a rear wheel differential mechanism.

Numeral 7 and 7 are left and right front axle cases, and are configured so that power is transmitted from the front wheel differential mechanism of the traveling mission case 5 through the left and right drive shafts 8 and 8. Reference numerals 9 and 9 denote front and rear steering drive wheels, which are fitted on the lower portions of the left and right front axle cases 7 and are pivotally mounted on a steering case 11 and 11 which is rotated by a steering handle 10 described later.

Reference numeral 12 denotes a steering transmission case having a speed change gear inside, which is fixed to the front end portions of both the left and right frames 2 and 3, and a handle post 13 is fixed to the upper portion thereof, and the upper end of the handle post 13 is fixed. Steering wheel 1 in the section
0 is provided. Further, a link 14 as a steering transmission mechanism whose rear end is connected to the left and right steering cases 11 and 11 is provided at the lower part of the steering transmission case 12, and when the steering handle 10 is turned, the steering transmission case is rotated. Left and right steering case 11 via a gear 14 in 12
11 is rotated around the vertical axis so that the left-right steering drive front wheels 9, 9 are turned.

Reference numeral 15 is a rear wheel drive case, which is provided at the rear ends of the left and right frames 2 and 3 so as to be freely rollable by a rolling shaft, and the left and right drive rear wheels 16 are mounted on both left and right sides thereof. 16 is configured to be able to swing up and down.
Reference numeral 17 denotes a transmission shaft that transmits power from the rear wheel differential mechanism of the traveling mission case 5 to the rear wheel drive case 15.

The left and right side clutches and left and right side brakes for the left and right drive rear wheels 16 and 16 are built in the transmission mechanism inside the rear wheel drive case 15, and the left and right clutch pedals provided in front of the engine 4 are provided. 18 ・ 1
The left and right side clutches are disengaged and the left and right side brakes are operated by the depression operation of 9. That is,
The driving of the rear drive wheels 16 and 16 on the side where the left and right clutch pedals 18 and 19 are depressed is stopped and the brakes are activated.

Reference numeral 20 denotes a vehicle body cover molded by FRP, which is an engine cover portion 20 that covers the periphery of the engine 4.
a, a step 20b provided on the front and left and right sides of the engine 4, a handle post cover 20c, and a step 20d provided on the rear of the engine 4 are integrally formed and fixed on the left and right frames 2.3. Has been done. 21
Is a control seat, which is installed and fixed on the upper surface of the vehicle body cover 20.

Reference numeral 22 denotes an upper link 22a and a lower link 22.
In the link mechanism composed of b, the base ends of the upper link 22a and the lower link 22b are the left and right frames 2.
3 is pivotally attached to a support frame 23 fixed to the rear end thereof, and the rear end portion is pivotally attached to a vertical frame 26 provided with a rolling shaft 25 that supports a seedling planting device 24 described later in a freely rotatable manner.

Reference numeral 27 denotes a hydraulic cylinder, the base of which is pivotally attached to the left and right frames 2 and 3, and the piston 2
8, the rear end of which is a swing arm 22c integrated with the upper link 22a
Is pivotally attached to. The seedling planting device 24 includes a transmission case 29 with a plant, which also serves as a frame, which is mounted on the rolling shaft 25 of the vertical frame 26 in a freely rotatable manner, and a transmission case 29 with the plant.
The seedling mounting table 32 supported by the upper support members 30a, 30b, 30b and the seedling receiving plate 31 and reciprocating in the lateral direction of the machine body, and the seedling mounting table mounted on the rear end of the planted transmission case 29. Nine seedling planting devices 33 for splitting one seedling per plant from the lower end of 32 and planting them in the field, and a rear part of the planting transmission case 29 pivotally supported so that its front part can swing up and down. The central leveling float 34 which is the mounted leveling body and the left and right leveling floats 35, 35 arranged on both left and right sides thereof
And outermost left and right ground leveling floats 36.3 arranged on the outermost side
It is composed of 6 etc. Each leveling float 34, 35
35, 36, and 36 are provided to level the field and to level the front of the field where seedlings are planted by the seedling planting device 33. The switch SW1 is a sensor for detecting that the seedling mounting table 32 is located at the center of the body left and right.

The planted transmission case 29 is a central transmission case 29a and left and right transmission cases 29 fixed to the left and right sides thereof.
b. 29b, and the central transmission case 29a has a middle case 37 extending rearward and a left and right case 3
8 and 38 are provided, and left and right transmission cases 29b and 29b
Each of the cases is provided with a case 39 extending rearward, and the seedling planting devices 33 ... Are attached to the rear ends of the cases 37, 38, 38, 39, 39.

The central transmission case 29a and the left and right transmission cases 29b and 29b are fixed by fixing nuts 40 and 40 having screw grooves inside as shown in FIG.
It is configured to be separable. The transmission shaft 41 in the case
41 is also configured to be connectable / separable by a coupling 42. The upper support member 30a for supporting the upper part of the seedling stand 32 has a base portion fixed to the central transmission case 29a, and the upper support members 30b and 30b have their base portions fixed to the left and right transmission cases 29b and 29b, respectively. .

The seedling receiving plate 31 is a central transmission case 29a.
Central seedling receiving plate 31a and left and right transmission case 29b fixed to the
-The left and right seedling receiving plates 31b and 31b fixed to 29b respectively are provided, and the respective seedling receiving plates 31a, 31b and 31 are formed.
The joint end face portion of b is configured to be connectable and separable.
Note that seedling receiving plates 31a, 31b, 31b are provided with seedling taking ports 43 ... for scraping the seedlings by the seedling planting devices 33 ... Corresponding to the nine seedling planting devices 33.

The seedling placing table 32 is a central seedling placing portion 32 for 5 rows.
a and the left and right seedling mounting portions 32b for two rows each on the left and right sides thereof
32b, and the square hole 45 of the connecting portion 45 integrally formed with the horizontal frame 44 fixed to the back surface of the central seedling mounting portion 32a and the lateral fixed to the back surface of the left and right seedling mounting portions 32b and 32b. The connecting member 48 is connected to the square holes 47a and 47a of the connecting portions 47 and 47 formed integrally with the frames 46 and 46.
-It is constructed so that it can be integrally connected by inserting 48. The switches SW2 and SW2 are connected to the central seedling placing portion 32a and the left and right seedling placing portions 32b by connecting members 48 and 48.
32b is a sensor for detecting the connection with each.

Reference numeral 49 is the middle case 3 of the central transmission case 29a.
7 is a central support frame fixed to the upper surfaces of 7 and the left and right cases 38, 38, and rotation support pins 50, 50 are provided at both left and right ends thereof. Reference numerals 51, 51 are left and right support frames fixed to the upper surfaces of the cases 39, 39 of the left and right transmission cases 29b, 29b, respectively, and their base ends are rotatably pivotally attached to the rotation support pins 50, 50, respectively. Has been done.

However, a central transmission case 29a having five seedling planting devices 33, a central seedling receiving plate 31a, a central seedling placing portion 32a, a central ground leveling float 34, and left and right leveling ground floats 3 are provided.
Central seedling planting unit A is composed of 5.35, etc.
Left transmission case 29 with three seedling planting devices 33
The left seedling planting unit B is constituted by b, the left seedling receiving plate 31b, the left seedling placing portion 32b, the outermost left ground leveling float 36, and the like.
Right transmission case 29 with two seedling planting devices 33
The right seedling planting unit C is configured by b, the right seedling receiving plate 31b, the right seedling placing portion 32b, the outermost right ground leveling float 36, and the like.

On the other hand, reference numerals 52, 52 are left and right hydraulic cylinders, which are fixed to the lower surface of the central support frame 49, and the pistons 53, 53 of the left and right hydraulic cylinders 52, 52 are connected via links 54, 54. Are connected to arms 51a and 51a fixed to the left and right support frames 51 and 51, respectively, and the pistons 53 and 53 of the left and right hydraulic cylinders 52 and 52 advance in the direction a to move the left and right support frames 51 and 51 in the direction b. The left and right seedling planting units B and C can be housed in the upper position of the central seedling planting unit A by rotating the unit. Incidentally, 55, 55 are recesses formed on the upper surface of the central support frame 49, and are provided on the vertical pipes 51b, 51b of the left and right support frames 51, 51 when the left and right seedling planting units B, C are in the storage position. The units B and C are supported by being engaged with each other. Further, the switches SW4L and SW4R are sensors for detecting that the left and right seedling planting units B and C are in the storage position, and the switches SW5L and SW5R are the left and right seedling planting units B and C are in the planting work position. It is a sensor that detects that.

Reference numeral 56 designates the above left and right hydraulic cylinders 52, 52.
A lever for switching the switching valve 56a for operating the left and right hydraulic cylinders 52 in the planting work state.
・ The pistons 53, 53 of 52 are retracted (moved in the opposite direction) to bring the left and right seedling planting units B, C to the state shown in FIG. 2, and the pistons of the left and right hydraulic cylinders 52, 52 when folded. The left and right seedling planting units B and C are brought into the stored state shown in FIG. 10 by advancing 53, 53 (moving in the direction a). The switch SW3 is a sensor that detects that the lever 56 is in the folded position. Also, 56b
Is a switching valve that can be switched by SOL1, and when the switch SW1 is turned on by the seedling table 32 being in the center position of the machine left and right, it becomes the switching position of FIG. However, since the switch SW1 is turned off when the seedling mounting table 32 is not in the center position on the left and right sides of the machine body, the lever 56 cannot operate the left and right hydraulic cylinders 52. ing. Furthermore, as shown in FIG. 10, the rotation axis S of the rotation support pins 50, 50 is substantially upright on the outermost left and right ground leveling floats 36, 36 of the left and right seedling planting units B, C in the folded state. Is set to.

Reference numeral 57 is an operation lever for adjusting the rearward pivoting position P1 of the central leveling float 34 and the left and right leveling floats 35, 35 up and down to change the seedling planting depth, and to the central transmission case 29a. The fixing operation guide 58 is configured so that it can be engaged with one of the guide grooves 58-1, 58-2, 58-3 ... To set the seedling planting depth. SW6
c, SW7c, SW8c ... Are sensors for detecting which guide groove the operating lever 57 is engaged with.

Reference numeral 59 is an operation lever for adjusting the rearward pivoting position P2 of the outermost left ground leveling float 36 to the upper and lower positions to change the seedling planting depth. The operation lever 60 is fixed to the upper support member 30b. Guide groove 60-1, 60-2, 60-3
It is configured so that the seedling planting depth can be set by engaging with one of the ... SW6L, SW7L, SW8L ... Are sensors for detecting which guide groove the operating lever 59 is engaged with.

Reference numeral 61 is an operation lever for adjusting the rearward pivoting position P2 of the outermost right ground leveling float 36 to the upper and lower positions to change the seedling planting depth. The operation lever 62 is fixed to the upper support member 30b. Guide groove 62-1 ・ 62-2 ・ 62-3
It is configured so that the seedling planting depth can be set by engaging with one of the ... SW6R, SW7R, SW8R ... Are sensors for detecting which guide groove the operating lever 61 is engaged with.

Reference numeral 63 is a fertilizer application device, which is fixed to the upper end of the support frame 23, and has a fertilizer tank 64,
A fertilizer feeding device 65 that is attached to the lower portion of each fertilizer application tank 64 and delivers the granular fertilizer in the fertilizer application tank 64 in fixed amounts.
, A transparent fertilizing pipe 66 for guiding the fertilizer fed by the fertilizer feeding device 65, and the central leveling float 3
4, left and right leveling floats 35, 35, outermost left and right leveling floats 36, 36 are fixed to the field on the side of the seedling planting position and the granular fertilizer guided by the fertilizing pipe 66 is dropped into the fertilizing groove. It is constituted by a grooving device 67 ... Reference numeral 68 denotes a drive arm for driving the fertilizer feeding device 65 ..., which is connected to the fertilizer application case 69 fixed on the left and right frames 2.3, and the fertilizer application case 69.
The drive shaft 70 is configured to transmit power from the traveling mission case 5. Each fertilizer feeding device 65 ... And each fertilizer application pipe 66 ... Are connected by a detachable joint 66a.

The fertilizer application tank 64 includes a central fertilizer tank 64a for 5 articles and left and right fertilizer tanks 64b, 64 for 2 articles.
The left and right fertilizer tanks 64b, 64b are hinges 64c, respectively on the left and right outer sides of the central fertilizer tank 64a.
They are connected by 64c, and are configured so that they can be housed in the direction of arrow C as shown in FIG. The left and right fertilizer tanks 64b and 64b are configured so that they can be fixed at a storage position and a fertilizer application position by a well-known engaging member.

Reference numeral 71 denotes a PTO transmission shaft having universal joints at both ends, which is provided to transmit the power of the fertilizer application case 69 to the planting transmission case 29 of the seedling planting device 24. Reference numeral 72 denotes a hydraulic valve provided between the front upper surface of the central ground leveling float 34 and the planted transmission case 29, and is a hydraulic pump when the front part of the central ground leveling float 34 is lifted by an external force beyond an appropriate range. At 73, the pressure oil pumped out of the traveling mission case 5 is sent to the hydraulic cylinder 27 to cause the piston to project and the link mechanism 22.
To raise the seedling planting device 24 to a predetermined position,
Further, when the front part of the central leveling float 34 falls below the proper range, the pressure oil in the hydraulic cylinder 27 is returned into the traveling mission case 5 and the link mechanism 22 is moved downward to set the seedling planting device 24 at a predetermined position. Hydraulic cylinder 2 when the front part of the central leveling float 34 is in the proper range (when the seedling planting device 24 is in the proper predetermined position).
It is provided in order to prevent the pressure oil in 7 from coming in and out and to hold the seedling planting device 24 at a fixed position. In this way, the central leveling float 34 is used as a grounding sensor for automatic height control of the planting device 24.

Reference numeral 74 denotes an operating lever which projects from the vehicle body cover 20 and is provided on the right side of the control seat 21 for connecting and disconnecting the power for driving and rotating the drive shaft 70 provided in the traveling mission case 5. The PTO clutch is operated to turn on and off the power to the fertilizer application device 63 and the seedling planting device 24, and the hydraulic valve 72 is operated to manually move the seedling planting device 24 up and down. Is also configured. That is, when the operating lever 74 is tilted forward (to the planting position), the PTO clutch is engaged, the fertilizer application device 63 and the seedling planting device 24 are driven, and the hydraulic valve 72 is switched by the vertical movement of the central leveling float 34. Controlled. On the contrary, when the operation lever 74 is raised rearward (to the upper position), the PTO clutch is disengaged and the operation of the fertilizer application device 63 and the seedling planting device 24 is stopped and the hydraulic valve 72 forcibly raises the seedling planting device 24. Switched to the side, seedling planting device 24
Is raised. Then, when the operation lever 74 is set to the neutral position in the middle of the operation stroke, the PTO clutch is disengaged, the operation of the fertilizer application device 63 and the seedling planting device 24 is stopped, and the hydraulic valve 72 stops the flow of pressure oil in the hydraulic cylinder 27. The seedling planting device 24 is switched to a position where it is held at a fixed position, and the seedling planting device 24 is held at the position when the operation lever 74 is operated to the intermediate position, and the seedling planting device 24 does not move up or down. SOL2 has a state in which the operating pin 75 is prevented from being operated from the neutral position to the planting position due to the operating pin 75 projecting in two directions, and the operating pin 75 is retracted in the opposite direction. By doing so, the operation lever 74 is provided so as to be switched from the neutral position to the state in which the operation lever 74 can be operated. More specifically, the connection member 48 is pulled out to disconnect the central seedling placing portion 32a and either of the left and right seedling placing portions 32b and 32b, and the switch S
When either W2 or SW2 is turned on, or when the lever 56 is operated in the folded state and SW3 is turned on, S
The operation pin 75 of the OL 2 is prevented from moving in the two directions to operate the operation lever 74 from the neutral position to the planting position. Further, the left and right connecting members 48, 48 are fitted to connect the central seedling placing portion 32a and the left and right seedling placing portions 32b, 32b so that both the switches SW2 and SW2 are turned off, and the lever 5
When 6 is operated to the planting work state and SW3 is turned off, the operating pin 75 of SOL2 is moved in the opposite direction to allow the operating lever 74 to be operated from the neutral position to the planting position. Become. With this configuration, the left and right seedling placing portions 3
At the time of changing operation of 2b and 32b to the folded state, and after changing,
It is possible to prevent the seedling planting device 24 from being accidentally driven by the operation lever 74.

Reference numeral 76 is a warning monitor which lights up and warns when the states of the right and left seedling planting units B and C are abnormal.
Both the switch SW4L and the switch SW5L are turned on.
If not (when the left seedling planting unit B is in an abnormal position that is neither the storage position nor the working position) or switch SW4
It is provided to issue a warning when both R and the switch SW5R are not turned on (when the right seedling planting unit C is in an abnormal position which is neither the storage position nor the working position). Therefore, when the warning monitor 76 is turned on, it is understood that the right and left seedling planting units B and C are in an abnormal state that is neither the storage position nor the working position, and the work is continued or the machine body is moved. It is possible to prevent the machine from being damaged. Although the warning is issued by the warning monitor in this embodiment, another warning sound may be issued or the main clutch may be disengaged together with the warning so that the vehicle cannot run.

Reference numeral 77 is a warning monitor for warning the improper adjustment of the planting depth. As shown in FIG.
7C ..., SW6L / SW7L ..., SW6R / SW7R ...
Is configured to be turned on to warn when the operation levers 57, 59, 61 are not operated to the same planting depth position. Therefore, when the warning monitor 77 is turned on, it can be determined that one of the operation levers 57, 59, 61 is erroneously operated, and the seedling planting depth can be prevented from being different.

Reference numeral 78 denotes a ridge clutch lever for individually stopping the driving of each seedling planting device 33, and each lever is connected to the clutch by an operation wire so that the left and right seedling planting units B and C can be folded. Has been done. Reference numeral 79 is an indicator light that is turned on when the seedling placing table 32 is located at the center position on the left and right sides of the machine body.

When performing the rice planting work with the riding type rice transplanter constructed as described above, the lever 56 is operated to the planting work state position and the pistons 53 of the left and right hydraulic cylinders 52, 52 are moved.
・ Retract 53 (move in the opposite direction) to put the left and right seedling planting units B and C in the working state, and set the transmission shafts 41 and 41.
The central transmission case 2 after connecting the
9a and the left and right transmission cases 29b and 29b are fixed to each other with fixing nuts 40 and 40, and the connecting portion 4 of the central seedling placing portion 32a is connected.
5, the square hole 45 and the connecting portion 47 between the left and right seedling mounting portions 32b and 32b
The connecting members 48, 48 are fitted into the square holes 47a of the above so as to integrally connect the central seedling placing portion 32a and the left and right seedling placing portions 32b, 32b. Then, the left and right fertilizer tanks 64b, 64b in the storage position as shown by the dotted line in FIG. 2 are set to the fertilizing action position (state shown by the solid line), and the joint 6 of the fertilizing pipe 66 ...
6a are connected to the fertilizer feeding device 65.

Then, when the seedlings are placed on the seedling placing table 32, the fertilizer is put in the fertilizer application tank 64, and the operation lever 74 is tilted forward in the field (at the planting position), the PTO clutch is engaged and the fertilizer application device 63. And the seedling planting device 24 is driven, and the hydraulic valve 72 is brought into an automatic control state in which it is switched by the vertical movement of the central leveling float 34, and the rice planting work is performed. At that time, at the same time, the fertilizer application device 63 applies the fertilizer in the field on the side of the seedling planting position.

Next, when the rice planting work is completed in the field and the field is moved to another field or loaded on a truck, the operation lever 74 is tilted forward (to the planting position) to move the seedling placing table 32 left and right. When the seedling mounting table 32 is located at the center of the machine left and right and the indicator lamp 79 is turned on, the operation lever 74 is set to the neutral position to stop the movement of the seedling mounting table 32 and stop the seedling mounting table 32 at the center of the machine lateral. .

Then, the fixing nuts 40, 40 are removed to remove the central transmission case 29a and the left and right transmission cases 29b, 29.
Separate from b, and remove the coupling 42 of the transmission shaft 41. Further, the connecting members 48, 48 are pulled out, and the central seedling placing portion 3
2a and the left and right seedling mounting portions 32b and 32b are separated. Thereafter, the lever 56 is set to the folded position, the pistons 53, 53 of the left and right hydraulic cylinders 52, 52 are advanced (moved in the direction a), and the left and right seedling planting units B, C are put into a stored state. At this time, since the left and right hydraulic cylinders 52, 52 do not operate when the seedling mounting table 32 is not in the center position of the body left and right, the members are not accidentally damaged.

Finally, when the joints 66a between the fertilizer feeding device 65 and the fertilizer application pipe 66 are removed and the left and right fertilizer tanks 64b and 64b are moved from the fertilizer application position to the storage position,
The width of the machine body becomes the width of the traveling vehicle body 1, and it becomes easy to move and load the truck.

[Brief description of drawings]

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

FIG. 2 is a rear plan view of a riding type rice transplanter.

FIG. 3 is a partial cross-sectional plan view illustrating the operation of main constituent members.

FIG. 4 is a front view illustrating the operation of main constituent members.

FIG. 5 is a plan sectional view of a main part of a seedling table.

FIG. 6 is a front view for explaining the action of the operation lever for changing the seedling planting depth.

FIG. 7 is a hydraulic circuit diagram for explaining the operation of main constituent members.

FIG. 8 is an electric circuit diagram for explaining the operation of main constituent members.

FIG. 9 is a plan view for explaining the operation for explaining the operation of the operation lever 74.

FIG. 10 is an overall side view showing the left and right seedling planting units B and C in the storage position.

[Explanation of symbols]

 1 Riding type vehicle body 22 Link mechanism 24 Seedling planting device 31 Seedling receiving plate 31a Central seedling receiving plate 31b Left and right seedling receiving plate 32 Seedling table 32a Central seedling mounting part 32b Left and right seedling mounting part 33 Seedling planting device 34 Central ground leveling float 35 Left and right Leveling float 36 Outermost left and right leveling float A Central seedling planting unit B Left seedling planting unit C Right seedling planting unit

Claims (1)

[Claims] 1. The left and right outermost left and right seedling placing portions 32b, 32b of a seedling placing table 32 of a seedling planting device 24 mounted on a riding type traveling vehicle 1 via a link mechanism 22 so as to be movable up and down. In the seedling planting machine, the left and right outermost left and right seedling placing sections 32b, 32b can be folded and stored only when the seedling placing table 32 is located at the center or substantially the center of the machine body. .