JP3495133B2 - Seedling 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 seedling transplanter for transplanting vegetable seedlings or the like onto the ridges in the field.

[0002]

2. Description of the Related Art Conventionally, as one form of a seedling transplanter, there is one in which a transplanter main body is connected to a rear portion of a traveling vehicle body so that seedlings can be continuously transplanted onto a ridge by the transplanter main body.

A pair of left and right gauge wheels are attached to the transplanter main body so that seedling transplantation can be performed while controlling the traveling direction of the transplanter main body pulled by the traveling vehicle body by the gauge wheels.

That is, when the field is formed on a sloping ground along a contour line, or when the ridge is meandering, the transplanter main body is laterally displaced laterally with respect to the longitudinal centerline of the ridge. When started, the operator operates the gauge wheel steering means to move the gauge wheel laterally, for example, when the transplanter main body is laterally displaced to the left with respect to the center line in the front-back direction of the ridge. The wheels are steered to the right so that the transplanter body is prevented from laterally shifting laterally with respect to the ridges while the transplanting work is performed substantially along the center line of the ridges in the front-rear direction.

In the field, a plurality of rows of ridges are formed in parallel, and after transplanting seedlings into one row of ridges, the transplanter body is raised and the traveling vehicle body is swung to move the adjacent ridges. The transplanting work is performed while reciprocally moving the machine body along the ridge in a meandering manner such as moving to the ridge.

[0006]

However, in the above-mentioned seedling transplanter, when the traveling vehicle body is turned to move to the next ridge in a state where the pair of left and right gauge wheels are steered in the left and right directions, Since the positions of the gauge wheels on the left and right sides are opposite, the positions of the gauge wheels that are being steered in the left and right directions are opposite. After returning the steering angle to 0 degrees,
In the next ridge, the transplanter body must be steered in order to prevent lateral displacement of the transplanter body in the lateral direction with respect to the ridge, and the steering angle of the gauge wheel must be changed every time the aircraft turns. The operator had to perform the operation of returning to 0 degrees every time, and the efficiency of the transplanting work was poor.

[0007]

In view of the above, according to the present invention, a transplanter main body is connected to a rear portion of a traveling vehicle body so as to be able to move up and down, and a pair of left and right gauge wheels are attached to a frame of the transplanter main body. In a seedling transplanter that can operate both gauge wheels by linking the wheel steering means in an interlocking manner, and that can also plant seedlings on the ridges by the planting claws of the planting unit mounted on the transplanter body. Ascending operation detecting means for detecting an ascending operation of the transplanter main body, and the gauge wheel steering means is operated based on the detection result of the ascending operation detecting means to forcibly return the steering angle of both gauge wheels to 0 degree. The present invention provides a seedling transplanting machine, which is provided with a forced returning means for causing the transplantation.

Further, in the present invention, the raising operation detecting means is
It is also characterized in that it detects the descending movement of the gauge wheel that can be lowered by its own weight, and that the raising operation detecting means detects the raising lever operation of the raising and lowering operation lever that raises and lowers the transplanter body. Have.

[0009]

[Function] When carrying out seedling transplanting work, the traveling car body is run along the ridge while towing the main body of the transplanter, and the seedlings of the planting section mounted on the main body of the transplanter allow the seedlings to be spaced on the upper surface of the ridge. When opening and planting, and moving from the ridge after transplanting seedlings to the adjacent ridge for non-seedling transplantation, raise the transplanter main body to make the gauge wheel non-grounded, then turn the running car body. And continue the seedling transplant work.

At this time, when the raising operation detecting means detects that the transplanter main body has been raised, the forced return means operates the gauge wheel steering means based on the detection result, and the pair of left and right gauge wheels are turned to face each other. Since the angle is forcibly returned to 0 degree, the operator can smoothly perform the subsequent steering operation of the gauge wheel adapted to the ridge, and the seedling transplanting work efficiency can be improved.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

Reference numeral N shown in FIG. 1 denotes a seedling transplanting machine according to the present invention, which is located behind a tractor T which is a traveling vehicle body.
Is connected via a three-point link mechanism C as a connecting portion so that it can be moved up and down. t is a rear wheel of the tractor T, 19 is a link bracket, 20 is a lower link, and 21 is a top link.

As shown in FIGS. 1 to 3, the transplanter main body A includes a pair of left and right transplantation units 25, 25 on the main frame 1.
A pair of left and right gauge wheels 26, 26, an operator's boarding step 27, a spare seedling stand 28, an operation box 29, etc. are provided at required locations.

As shown in FIGS. 1 to 3, the main frame 1 has a square pipe frame 2 horizontally mounted on the front part of the transplanter main body A, and at the left end of the same square pipe frame 2, the left side facing rearward. The chain case 3 is fixedly installed, and the connecting pipe 4 is installed between the rear parts of the chain case 3. In addition,
The connecting pipe 4 can be cut out in the middle to form a left and right separate connecting pipe, and FIG. 2 adopts the structure of such a left and right connecting pipe.

Further, as shown in FIG. 2, a hexagonal shaft 15 as an output shaft of the chain case 3 is inserted into the connecting pipe 4 to transmit power to the rear transplant units 25, 25. Is.

A guard pipe 6 having a substantially U-shape in plan view is connected to the left and right connecting pipes 4 via a bracket 5 so as to face rearward. The guard pipe 6 constitutes the main frame 1 of the transplanter main body A, and is composed of left and right straight pipes 7 and a bent pipe 9 connected to the rear ends thereof via a connecting portion 8.

The square pipe frame 2 has a gear box 2a in the center, and the drive shaft 11 in the square pipe frame 2 is connected to the PTO shaft P of the tractor T via the gear box 2a.
Is transmitted to the hexagonal shaft 15 from the drive shaft 11 via the chain case 3.

In addition, on both ends of the square pipe frame 2, square pipe-shaped left and right columns 13, 1 are mounted via mounting brackets 12, 12.
3 are erected.

The left and right struts 13, 13 are curved backward from the middle, and a horizontal pipe 14 is horizontally mounted on the upper end thereof, and the operation box 29 is attached to the center of the horizontal pipe 14.

Further, left and right inclined pipes 16, 16 are interposed between the horizontal pipe 14 between the left and right columns 13, 13 and the left and right straight pipes 7, 7 of the guard pipe 6 which is substantially U-shaped in plan view. It is set up.

The upper ends of the left and right inclined pipes 16, 16 are horizontal pipes.
Fixed at both ends of 14 via fixed brackets 17, and the lower ends of the inclined pipes 16, 16 are fixed at the rear ends of the left and right straight pipes 7, 7 via horizontal brackets 18.

As described above, the main frame 1 of the transplanter main body A is composed of the square pipe frame 2, the guard pipe 6, the left and right columns 13,13, the left and right inclined pipes 16,16, etc., and has a simple structure. Regardless of the frame structure, the overall strength is increased.

As shown in FIGS. 1 to 3 and 5, the gauge wheels 26, 26 are rotatable left and right behind the lower link 20 of the three-point link mechanism C and below the left and right ends of the square pipe frame 2. The boss portions 31 and 31 are vertically provided at the left and right ends of the square pipe frame 2, respectively, and the support cylinders 40 and 40 having the axis line in the vertical direction are provided in the boss portions 31 and 31, respectively. It is inserted rotatably around the coaxial line, and the support shafts 32, 32 are inserted into the support cylinders 40, 40.
The upper half part of the
Gauge wheels 26,26 are attached to the lower ends of 2,32 so that they can roll by grounding.

As shown in FIGS. 2 and 4, a pair of left and right gauge wheels 26, 26 is interlocked with a gauge wheel steering device 33 as a gauge wheel steering means. 33
Is a tie rod 34 installed between the left and right gauge wheels 26, 26.
And a pitman arm 35 that connects both ends of the tie rod 34 and the left and right support shafts 32, and a telescopic device 37 that connects the tip end to the middle portion of the tie rod 34 and the rear end to the square pipe frame 2, respectively. There is. 34a is a tie rod connecting pin.

The expansion / contraction portion 37 is interposed between the tie rod 34 and the square pipe frame 2, and the electric rod M is operated by the electric motor M using the battery of the tractor T as a power source to rotate the screw rod in the forward and reverse directions to form the expansion / contraction rod 38. The electric motor M is configured to expand and contract, and is connected to a control unit 41 provided in the operation box 29 as shown in FIG. 1, and a steering operation lever 42 electrically connected to the control unit 41. This enables forward and reverse rotation drive operation. 37a is an extension joint bracket, 37b, 37c
Is a connecting pin.

In the above structure, the gist of the present invention is based on the raising operation detecting means for detecting the raising operation of the transplanting machine body A and the detection result of the raising operation detecting means. The gauge wheel steering device 33 is operated to provide a forcible return means for forcibly returning the steering angles of the two gauge wheels 26, 26 to 0 degrees. With reference to FIGS. explain.

That is, as shown in FIGS. 4 and 5, the raising operation detecting device 45 as the raising operation detecting means has a switch accommodating case 46 attached to the upper end of the boss portion 31, and a ceiling wall inside the case 46. The gauge wheel lowering detection switch 47 is attached to, while the lowering detection switch 47 is connected to the control unit 41, the switch operating rod 48 is extended upward from the upper end of the support shaft 32 supporting the gauge wheel 26, Insert the rod through hole 31b formed in the ceiling wall 31a of the boss portion 31 into the rod insertion hole 31b, and arrange the upper end of the switch operating rod 48 close to the switch operating protrusion 47a of the gauge wheel lowering detection switch 47. Between the inner surface of the ceiling wall 31a and the upper end surface of the support shaft 32, a descending biasing spring 49 is wound around the outer peripheral surface of the switch operating rod 48 so as to be interposed. Reference numeral 32a is an ascending regulator attached to the middle of the support shaft 32, and 48a is a descending regulator attached to the upper end of the switch operating rod 48.

In this way, in the ascending operation detecting device 45, the descending biasing spring 49 elastically biases the gauge wheel 26 in the direction of constantly lowering it so that the switch actuating rod 47 is fitted to the switch actuating protrusion 47a of the descending detecting switch 47. While the switch is in the ON state when the switch does not act, the gauge wheel 26 is grounded, and the ground reaction force causes the gauge wheel 26 to move up against the urging force of the downward urging spring 49, causing the switch operating rod 48 to switch. The switch is turned off when it acts on the actuating protrusion 47a.

Further, a forced return device as a forced return means
As shown in FIGS. 4 and 6, 50 is a telescopic rod 38 attached to the telescopic portion 37.
The neutral position detection sensor 51 for detecting the neutral position, that is, the expansion / contraction position where the steering angle of the pair of left and right gauge wheels 26, 26 is set to 0 degree, is attached.
Connected to 41.

In this way, when the gauge wheel lowering detection switch 47 of the raising operation detecting device 45 is turned on, the control section 41 judges that the raising operation of the transplanter main body A is performed, and the electric motor By operating M, the telescopic rod 38 is telescopically operated, and the neutral position of the telescopic rod 38 is detected by the neutral position detection sensor.
When 51 detects, the detection result is input to the control unit 41,
The control unit 41 stops the operation of the electric motor M, forcibly restores the steering angle of the pair of left and right gauge wheels 26, 26 to 0 degree, and the same state can be maintained.

Therefore, when the seedling transplanting machine N is performing seedling transplanting work, the raising / lowering operation lever L is used for turning the machine body.
When the transplanter main body A is raised by the three-point link mechanism C by operating (see FIG. 7), the steering angle of the pair of left and right gauge wheels 26, 26 is automatically set to 0 degree. When the seedling transplanting work is performed by lowering the transplanter main body A again after being forcibly restored, the steering operation of the gauge wheels 26, 26 can be smoothly performed.

FIG. 7 shows a raising operation detecting device 45 as another embodiment, in which the gauge wheel lowering detecting switch 47 is provided in the raising operating range of the raising and lowering operating lever L provided on the tractor T.
A raising lever operation detection switch 55 is arranged instead of the above, and the raising operation of the raising / lowering operation lever L can be detected by the switch 55.

In this way, when the raising lever operation detection switch 55 is turned on when the raising / lowering operation lever L is raised to raise the transplanter main body A, the controller 41
Outputs a signal to the electric motor M to operate the electric motor M.

As in the case of the above-described embodiment, the steering return angle of the pair of left and right gauge wheels 26, 26 is forcibly returned to 0 degree by the forced return device 50 and is maintained in the same state. ing.

The left and right gauge wheels 26, 26 are attached to the support shafts 32, 3
There are cases where it is arranged inside, and cases where it is arranged outside with respect to the center of 2. This is due to changing the positions of the transplanting units 25, 25 on the left and right to change the distance between the sections, and the planting section. It is adjusted at the same time when considering the number. In the case of this embodiment, when three transplanting units 25 are arranged side by side in the left-right width direction so as to form a three-row plant, the left and right gauge wheels 26, 26 are arranged outside the support shaft 32. There is.

Two transplanting units 25 are provided on the left and right sides so that two-row planting is possible. Since the left and right transplanting units 25 have the same structure on the left and right, one unit will be described.

As shown in FIGS. 1 to 3, the transplant unit 25
Is a unit frame 60 suspended from the left and right columns 13 and 13 via an elevating mechanism 61, a seedling mount 62 slidable back and forth along the unit frame 60, and a lateral mount provided on the seedling mount 62. Feeding mechanism 63 and vertical feeding mechanism 64 of seedling tray 71 equipped on seedling placing table 62
A seedling taking nail drive mechanism 66 that constitutes the planting portion 65 provided in the unit frame 60, a planting nail drive mechanism 67 that also constitutes the planting portion 65 provided in the unit frame 60, and the lateral feed mechanism 63. , A vertical feed mechanism 64, a seedling taking claw driving mechanism 66, and a planting claw driving mechanism 67, which transmits a power taken from the hexagonal shaft 15 to a transmission unit 70, and a compression ring 68 arranged at a lower front portion of the unit frame 60. And a soil-covered earth wheel 69 arranged in the lower rear part of the unit frame 60.

The seedling picking nail drive mechanism 66 and the planting nail drive mechanism
67 are arranged at the upper and lower positions, and in FIG. 2, the seedling taking nail driving mechanism 66 and the planting nail driving mechanism 67 are separately shown in each of the left and right transplanting units 25. I am trying to understand 67. 66a is a seedling nail and 67a is a planting nail.

As shown in FIGS. 1 and 2, the unit frame 60 has a frame structure that constitutes a substantially rectangular box-shaped skeleton. Inside this frame, the seedlings placed on the seedling placing table 62 are placed. A transplanting mechanism is provided for taking out the seedlings from the seedling pot on the tray 71 and planting them in the soil.

With the above-described structure, when transplanting seedlings, the transplanter main body A is connected to the tractor T via the three-point link mechanism C, and the seedlings are transplanted while the tractor T is running. To go.

The seedling transplanting operation is input from the PTO shaft (not shown) of the tractor T, and the power is transmitted from the drive shaft 11 to the mission unit 70, and the mission unit 70 drives the seedling removing pawl drive mechanism 66 and the planting pawl. Power is transmitted to the drive mechanism 67.

The seedling table 62 of the transplanting unit 25 is a lateral feed mechanism.
The seedlings are taken out from the seedling tray 71 by the seedling picking nails 66a while being laterally fed by 63, and the seedlings are planted in the field by the planting nails 67a.

Further, the transplanting unit 25 controls the vertical position by the elevating mechanism 61 while suppressing the pressure of the compression wheel 68 and covering the soil.
Although the soil cover pressure of 69 is changed, such an operation can be carried out by the operator on board the operator boarding step 27.

Then, as shown in FIG. 8, the elevating mechanism 61 attaches the upper end of the upper tubular body 85 to the horizontal pipe 14 with a mounting bracket.
The upper cylindrical body 85 is slidably connected to the upper cylindrical body 85 through the guide body 88 while the upper cylindrical body 85 is slidably connected to the upper cylindrical body 85. Is rotatably attached by a pivot 89a whose axis is oriented in the left-right width direction, and the lower cylinder body 87 is inserted into the ring-shaped bracket 89, and is attached to the lower end of the ring-shaped bracket 89 and the lower end of the lower cylinder body 87. A support spring 90 is wound around the outer peripheral surface of the lower tubular body 87 and is interposed between the support spring 90 and the attached spring receiving body 87a.

Then, the upper part of the lifting rod 91 is inserted into the upper tubular body 85, and the lifting operation handle is attached to the upper end of the lifting rod 91.
Along with mounting 92, a male screw portion 91a formed in the lower half of the lifting rod 91 is screwed into a female screw portion 93 attached to the upper end of the lower tubular body 87.

A guide groove 88a is formed on the guide body 88 along the axis of the elevating rod 91, and a detent pin 87a attached to the upper end of the lower cylindrical body 87 slides in the guide groove 88a. It is freely inserted.

In this way, by operating the elevating and lowering operation handle 92 in the forward and reverse directions, the lower cylinder body 87 is vertically moved up and down through the female screw body 93 screwed to the screw portion 91a, and the lower cylinder body 87 is moved up and down.
The transplant unit 25 supported in a suspended state via the support spring 90 can be raised and lowered while maintaining a substantially horizontal posture.

In addition, as shown in FIGS. 8 to 10, the transplantation unit elevation regulating hole 87b is formed in the upper portion of the lower cylindrical body 87, while the elevation regulating hole 87b is formed in the ring-shaped bracket 88.
An ascending restricting body 94 that engages with and restricts the ascending operation of the transplant unit 25 is attached.

That is, the rising regulator 94 is shown in FIG. 9 and FIG.
As shown in FIG. 0, the regulation pin support portion 95 having a substantially U-shape in plan view is attached to the ring-shaped bracket 89, and the ring-shaped bracket 89 is formed in the pin insertion hole 95b formed in the ceiling wall 95a of the regulation pin support portion 95. The regulation pin 99 with its axis oriented in a direction orthogonal to the axis of the is slidably inserted, and the regulation pin 96 is inserted into the spring 99.
The elastic member is elastically urged in the direction of advancing toward the ring-shaped bracket 89 side, and the restriction pin retreat holding portion 97 formed in a substantially L-shape in plan view is formed on the restriction pin 96 portion located outside the restriction pin support portion 95. A rotation operation handle 98 is attached to the outer end of the attachment / regulation pin 96. 99 is a spring receiver.

As shown in FIGS. 9 and 10, the restriction pin retracting holding portion 97 is integrally formed into a substantially L shape by the horizontal holding portion forming piece 97a and the rising holding portion forming piece 97b, and is horizontally held. By bringing the part forming piece 97a into contact with the ceiling wall 95a of the regulation pin support portion 95, the tip of the regulation pin 96 can be made to penetrate into the through hole 89b formed in the ring-shaped bracket 89. By contacting the tip of the rising holding portion forming piece 97b with the ceiling wall 95a, the tip of the regulating pin 96 can be set in the retracted state in which the through hole 89b is housed. To change the posture of the portion 97, hold the rotary operation handle 98 and set the regulation pin 96 to 9
This can be done by rotating around the 0 degree axis.

In this way, by holding the regulating pin 96 in the retracted state in which the tip end is housed in the through hole 89b, the transplant unit 25 can be suspended up and down on the lateral pipe 14. , The regulation pin 96 and the tip pin are through holes 89b
By making an advanced state of penetrating through the inside and pressing the tip against the outer peripheral surface of the lower tubular body 87, the operator lifts and raises the transplant unit 25, and the restriction pin 96 is inserted in the transplant unit elevation restriction hole 87b. By matching, the same rise restriction hole 87
The restriction pin 96 is inserted into the b by the elastic biasing force of the spring 99 so that the transplant unit 25 can be fixed.

Further, as shown in FIGS. 1 and 2, the tire guards 8 formed on the left and right side portions of the operator boarding step 27.
Tray collecting boxes 81, 81 are arranged above the 0, 80, respectively, and the empty seedling trays 71 are accommodated in the tray collecting boxes 81, 81.

In this way, the tray collecting boxes 81, 81 prevent the empty seedling tray 71 from being scattered and the tractor T
An operator working near the rear wheel t is guarded so that safety can be improved.

Further, as shown in FIGS. 11 and 12, a pair of left and right stands 100, 100 are attached to the rear ends of the right and left straight pipes 7, 7 of the guard pipe 6 to attach the mounting bracket 10 to each other.
It is mounted so as to be able to be tilted up and down via 1, 101, and interlocking mechanisms 103, 103 are provided between the stands 100, 100 and the stand storage operation levers 102, 102 mounted on the left and right columns 13, 13, respectively. . 104 is the stand pivot, 1
05 is a lever spindle.

The interlocking mechanism 103 includes an operating lever 107 attached to the lever support shaft 105 of the stand storage operation lever 102 via a boss 106, and a support shaft interference avoidance lever 108 connected to the tip of the operating lever 107. The feedback wire 109 has one end connected to the tip of the lever 108 and the other end connected to the stand 100.

Also, the stand 100 and the mounting bracket 101
A standing urging spring 110 for urging the stand 100 in the upright direction is interposed between and.

In this way, the stand storage operation lever
By rotating 102 forward, the stand 100 can be rotated forward through the interlocking mechanism 103 to be stored in the horizontal lying posture, while the stand storage operation lever 102
By rotating the lever backward, the tension force via the interlocking mechanism 103 is released, and the stand urging spring 110 allows the stand 100 to stand.

Therefore, when the transplanter N is transported by a transport vehicle, the pair of left and right stands 100, 100 can be placed in an upright state and the seedling transplanter N can be transported in a stable state as described above.

Further, as shown in FIGS. 13 and 14, the guard pipe 6 has a pair of left and right pivot brackets 115, 115 attached to the left and right sides of the connecting pipe 4, and a pair of left and right straight pipes is attached to each pivot bracket 115, 115. The front ends of 7, 7 are pivotally supported by pivots 116, 116 whose axes are oriented in the up-and-down direction, so that the straight pipes 7, 7 are rotatable in the left-right width direction, respectively, and between the rear ends of the straight pipes 7, 7. The bent pipe 9 is detachably connected through the connecting portions 8 and 8 to be horizontally mounted, and the pivot pipes 117 and 117 are arranged on the left and right side portions of the horizontal pipe 14 on the same axis as the pivot shafts 116 and 116.
And the upper ends of the pair of left and right inclined pipes 16 and 16 are attached to the respective pivot brackets 117 and 117, and the lower ends of the inclined pipes 16 and 16 are connected to the rear ends of the pair of right and left straight pipes 7 and 7. The parts 8 and 8 are connected to each other.

In this way, the bent pipe 9 is removed from the rear ends of the straight pipes 7 and 7, and the left straight pipe 7 and the inclined pipe 16 and the right straight pipe 7 and the inclined pipe 16 are removed.
By rotating the and around the pivots 116, 116, 118, 118 outward, the left and right sides and the rear of the transplant unit 25, 25 are opened, and the adjustment of the planting claw 67a provided on each transplant unit 25, 25 is adjusted. It makes it easy to perform maintenance on each part.

[0061]

According to the present invention, the following effects can be obtained.

According to the first aspect of the present invention, the raising operation detecting means for detecting the raising operation of the transplanter main body by the seedling transplanting machine,
Based on the detection result of the ascending operation detection means, the transplanter main body is provided with the forced return means for operating the gauge wheel steering means to forcibly return the steering angle of both gauge wheels to 0 degree. When the vehicle body is turned by raising the steering wheel, the steering angle of the gauge wheel is always forcibly returned to 0 °, and the steering operation of the gauge wheel adapted to the ridge can be performed smoothly thereafter. In addition, the seedling transplant work efficiency can be improved.

In addition, when the transplanter main body is raised to bring the gauge wheel into a non-grounded state, the steering wheel is kept in a state where the steering angle of the gauge wheel is 0 degree. In this case, the gauge wheel can be put in the steering lock state, and it is possible to prevent an unexpected accident that the gauge wheel makes a steering operation in such a state.

According to the second aspect of the present invention, the ascending operation detecting means detects the operation of the gauge wheel descending due to its own weight against the ground reaction force with the ascending operation of the transplanter main body, and the forcibly returning means. As a result, the steering turning angle of the gauge wheel can be forcibly returned to 0 degree, so that the forcible return operation of the gauge wheel can be smoothly and reliably performed in the state where almost no ground reaction force is received.

According to the third aspect of the present invention, since the raising operation detecting means directly detects the raising lever operation of the raising / lowering operation lever for raising / lowering the transplanter main body, such raising operation detection can be reliably performed and forced. The subsequent operation of forcibly returning the steering angle of the gauge wheel to 0 degree by the returning means can be surely performed without malfunction.

[Brief description of drawings]

FIG. 1 is a side view of a seedling transplanter according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a rear view of the same.

FIG. 4 is a plan view showing a steering mechanism for a gauge wheel.

FIG. 5 is an explanatory sectional side view of a lifting operation detection device.

FIG. 6 is a control block diagram.

FIG. 7 is a control block diagram of a rising operation detecting means as another embodiment.

FIG. 8 is a sectional side view of the lifting device.

FIG. 9 is a sectional plan view of the lifting device.

FIG. 10 is a partially enlarged sectional side view of the lifting device.

FIG. 11 is an explanatory view of a stand mounting structure.

FIG. 12 is an explanatory view of a tilting operation of the stand.

FIG. 13 is a side view illustrating a guard pipe.

FIG. 14 is an explanatory plan view of the guard pipe.

[Explanation of symbols]

A transplanter body 1 mainframe 25 transplant units 26 gauge wheel 27 Operator boarding steps 29 Operation box 33 gauge wheel steering device

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Norihiko Muneyoshi 5-32-7 Sendagaya, Shibuya-ku, Tokyo Inside Ishikawajima Shibaura Machinery Co., Ltd. (56) Reference JP-A-8-37812 (JP, A) 61-128810 (JP, A) JP-A-5-41913 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A01C 11/00-11/02 303 A01B 63/16

Claims (3)

(57) [Claims] 1. A transplanter main body is vertically movably connected to a rear portion of a traveling vehicle body, a pair of left and right gauge wheels is attached to a frame of the transplanter main body, and gauge wheel steering means are interlockingly connected to both gauge wheels. Detecting the raising operation of the transplanter body in a seedling transplanter that allows both gauge wheels to be steered and the seedlings on the ridge can be used to plant seedlings with the planting claws on the transplanter body. Rising operation detection means,
A seedling transplanter comprising: forced return means for operating the gauge wheel steering means based on the detection result of the raising operation detection means to forcibly return the steering angle of both gauge wheels to 0 degree. . 2. The seedling transplanter according to claim 1, wherein the ascending operation detecting means detects an ascending operation of a gauge wheel that can be descended by its own weight. 3. The seedling transplanter according to claim 1, wherein the raising operation detecting means detects the raising lever operation of the raising / lowering operation lever for raising / lowering the transplanter main body.