JPH05236802A - Marker-operation apparatus for paddy field working vehicle - Google Patents

Abstract

PURPOSE:To prevent the unnecessary motion of a marker in lock-releasing operation and smoothly perform the lock-releasing operation. CONSTITUTION:A marker driving arm 691 is placed in a state freely swivellable around a supporting shaft 67 to take a working position P1 to fall a marker and a lock position P2 to erect the marker. A freely swivellable marker stopper 621 is forced from an inclined position P4 toward a standing position P3. A roller 70 integrated with the driving arm 691 is supported from under with a stopper cam face 63a of the marker stopper 621 in standing position P3 and the driving arm 691 is kept in locking position. The cam face 63a is formed in the form of circular arch having a radius R round a supporting shaft 61 to enable smooth release of lock without causing unnecessary push-up of the roller 70 with the cam face 63a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paddy field working vehicle such as a passenger rice transplanter, and more particularly to a marker operating device for a paddy field working vehicle in which a marker is laid down and raised.

[0002]

2. Description of the Related Art Generally, passenger rice transplanters (paddy work vehicles)
Is equipped with one marker on each of the left and right sides of the traveling machine body for drawing a line which should be a traveling reference at the time of planting. The left and right markers are alternately used, and are laid down when in use and held upright when not in use.

A marker operating device for switching over and upright of a marker includes two left and right marker driving arms. One end of each marker drive arm is swingably supported, and each marker is raised and lowered by a connecting member such as a wire connected to the other end. That is, each marker drive arm is configured to swing between a lower operation position corresponding to the fall of the marker and an upper lock position similarly corresponding to the upright position. Further, an engaging portion is provided at the other end of the marker driving arm so as to project, and the marker driving arm is supported from below by the engaging surface of the marker stopper so that the marker driving arm can be locked at the locked position. It is designed to hold. The marker stopper has, for example, a swing center on the lower end side and is configured to swing between an upright position and an inclined position, and the engaging surface supports the engaging portion from substantially below at the upright position. While the marker drive arm is held at the lock position by the tilting position, the engagement surface is retracted from below the engagement portion at the inclined position to release the locked state.

[0004]

However, according to the above-mentioned conventional example, when the engagement surface of the marker stopper is disengaged from the engagement portion of the marker driving arm, the shape and arrangement of the engagement surface may be different. The phenomenon that the engaging portion is temporarily lifted by the engaging surface during the retracting operation and then descends toward the operating position occurs. Due to this improper movement of the marker driving arm, the marker moves up unnecessarily once and then reaches the laid-down position, resulting in an undesired movement of the operator and the like.

Therefore, according to the present invention, with respect to the shape and arrangement of the engagement surface of the marker stopper, the force exerted on the engagement surface by the engagement portion of the marker drive arm when in the locked position is substantially the center of rotation of the marker stopper. It is an object of the present invention to provide a marker operating device for a paddy field vehicle, which is configured to be suitable for the above, and thus solves the above problems.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and comprises a traveling machine body (5) and a working unit (10) mounted on the traveling machine body (5) so as to be able to move up and down. In the paddy field vehicle (1), which is equipped with the operation lever (20), the marker actuating device is switched to operate, and the markers (17 ₁ , 17 ₂ ) arranged on the left and right sides of the traveling machine body (5) are appropriately laid down and erected. The marker actuating device is swingably supported by a rotating shaft (67), and the marker (17 ₁ , 17 ₂ ) is laid down on the operating position (P ₁ ) and the markers (17 ₁ , 17 _2). ) Upright lock position (P
₂ ) and a marker driving arm (69 ₁ , 69 ₂ ),
The marker drive arm (69) is swingably supported by the rotation shaft (61) and is in the lock position (P ₂ ).
_1, 69 ₂₎ standing position engaging the engaging portion (70) of (P
₃ ) and a marker stopper (62 ₁ , 62 ₂ ) that takes an inclined position (P ₄ ) for releasing the engagement, and the marker stopper (62 ₁ , 62 ₂ ) is the lock position (P ₂ ). Has an engaging surface (63a) for supporting the engaging portion (70) of the marker driving arm (69 ₁ , 69 ₂ ) from below, and the engaging portion (70) of the marker driving arm (69 ₁ , 69 ₂ ) The force acting from 70) on the engagement surface (63a) is arranged so as to be directed to the vicinity of the rotation axis (61) of the marker stopper (62 ₁ , 62 ₂ ).

[0007]

Based on the above construction, for example, one of the marker driving arms (69 ₁ ) is moved from the operating position (P ₁ ) to the locking position (P ₁ ).
Swing it to ₂ ) and move the marker (1
7 ₁ , 17 ₂ ) are erected, and the engagement portion (70) is supported from below by the engagement surface (63 a) of the marker stopper (62 ₁ ) located at the erected position (P ₃ ). The entire drive arm (69 ₁ ) is in the locked position (P
₂ ) held in. At this time, the force exerted by the engaging portion (70) on the engaging surface (63 a) is the marker stopper (62
Each member is arranged so as to face the vicinity of the rotation axis (61) of ₁ ). One example of achieving this is the engagement surface (63
a) is arcuate, and the arcuate arc is arranged at a position substantially coincident with an arc having a radius (R) about the rotation axis (61). With this configuration, the contact portion between the engaging portion (70) and the engaging surface (63a) is kept at a substantially constant distance from the center of the rotating shaft (61) during the disengagement (retraction) operation. Therefore, the engaging portion (70) does not rise unduly.

[0008]

As described above, according to the present invention,
The marker driving arm (69 ₁ ) moves to the marker stopper (62
_In the state of being held at the lock position (P ₂ ) by ( ₁ ), the engaging portion (70) moves the engaging surface (63a) to the rotary shaft (6).
1) By biasing toward the vicinity, the engagement surface (63a) during the disengagement operation does not unduly raise the engagement portion (63). That is, unnecessary movement (raising) of the marker (17 ₁ ) is prevented. As a result, workers etc.
The suspicious movement of the marker is effectively prevented from being mistaken for a device failure.

It should be noted that the reference numerals in parentheses above are for the purpose of contrasting with the drawings, but do not limit the structure of the present invention.

[0010]

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

As shown in FIG. 1, a riding rice transplanter 1 as a paddy field vehicle has a traveling machine body 5 supported by front wheels 2 and rear wheels 3, and the traveling machine body 5 has a front end portion thereof. An engine 6 is mounted on the vehicle, and a driver's seat 9 having a seat 7 on the rear portion is arranged. Further, a planting part (working part) 10 is supported on the rear of the traveling machine body 5 via links (link mechanisms) 8a and 8b so as to be able to move up and down, and the planting part 10 has a large number of planters 11 ,. A float 14 and a seedling stand 12 are provided. Further, a hydraulic cylinder device 16 is provided between the rear end portion of the traveling machine body 5 and the bracket 15 fixed to the upper link 8a, and based on expansion and contraction of the hydraulic cylinder device 16 by a hydraulic control valve described later. The planting unit 10 moves up and down. In addition, the line drawing markers 17 ₁ , 17 ₂ are provided on the left and right of the planting section 10.
Are arranged so that they can be tilted up and down (see FIGS. 13 and 14).

As shown in detail in FIGS. 2 to 4, a driver's seat 9 is provided with a planting portion raising / lowering operation lever 20 on the side of the seat 7, and the operation lever is provided on the side of the seat. It is guided by a guide groove 19a formed in the guide plate 19. In addition, the frame 5 that constitutes the machine body 5
A plate (base member) 21 having an L-shape in a front view is fixed to a seat column 5b erected at a via a bracket, and is below the upper plate of the plate 21 and inside the side plate, that is, the plate 21. Hydraulic control valve 23 inward of L
(Hydraulic valve) is arranged, and the operating shaft 23a of the valve 23 extends outside the side plate of the plate 21, and the valve operating plate 25 is fixed there. On the other hand, a cam plate (valve drive plate) 22 constituting a control member is rotatably supported by a support shaft 26 on a side plate of the plate 21, and a lug bent at a right angle to the main body of the cam plate 22. The operation lever 20 is rotatably supported on the shaft 22a via a pivot pin 27. Therefore, the operating lever 20 is
Thus, it is supported integrally with the cam plate 22 so as to be rotatable in the front-rear direction of the machine body, and is also supported by the pivot pin 27 so as to be swingable in the left-right direction. In addition, the cam plate 22 and the hydraulic control valve 23
The valve operating plate 25 and the valve operating plate 25 are arranged so as to overlap each other in a side view.

As shown in FIGS. 4 and 5, the flat cam plate 22 includes an operating lever connecting portion composed of the lug 22a, a planting clutch operating portion 22b, and a hydraulic control portion 22c.
And an auto-return operating portion including an arc-shaped elongated hole 22d centered on the support shaft 26. The planting clutch operating portion 22b is composed of a cam surface that comes into contact with a roller 31 rotatably supported at the tip of the cam arm 30, and has a large concave portion a into which the roller fits and a land portion from the large concave portion to the small convex portion b. It has a small recess c ₁ formed in c and a recess c ₂ formed at the end of the land c. Also, the hydraulic control unit 22c
Is a concave portion f that receives the pin 25a implanted in the valve operating plate 25, allows the pin 25a to move within the concave portion to form an interchange mechanism (automatic range), and forms one side surface f _{1 of the} concave portion. The pin 25a is brought into contact with and moved integrally (manual range).

The operation shaft 23a of the hydraulic control valve 23
In the valve operating plate 25 that is fixedly installed in the valve operating plate, the pin 25a implanted in the operating plate is directly operated by the hydraulic control unit 22c of the cam plate 22, and therefore the hydraulic control valve 23 is directly controlled by the cam plate 22. And a highly responsive planting part 10
The recess f that constitutes the accommodation mechanism can be directly formed in the cam plate 22, and the accommodation width can be set to a large value as necessary.
By setting the automatic range of 3 to a large value, it is possible to perform quick automatic lifting control.

On the other hand, a support shaft 3 is provided on the side plate of the plate 21.
2, the arm 30 is rotatably supported,
The other end of the arm 30 has a rod 33 having a long hole 33a.
And a spring 35 for connection to a planted clutch arm 36, which operates the planted clutch. Further, the spring 35 operates the planted clutch against the built-in spring of the clutch, and the reaction thereof acts from the roller 31 to the clutch operating portion 22b of the cam plate 22 via the rod 33 and the arm 30. Therefore, the clutch operating portion 22b also operates a planting clutch and also serves as a positioning mechanism for holding the cam plate 22 at a predetermined position by pressing the roller 31 biased by the spring 35. There is. Also, the cam plate 22
In addition, since the clutch operating portion 22b also serves as a restricting surface for holding the position in addition to the operation cam surface of the clutch, the structure can be made compact, and the restricting surface portion can be assigned to another function. It is possible to enhance the functions such as.

A float interlocking arm 38 having an inverted L-shape in a side view is rotatably supported on the valve operating shaft 23a, and the tip of the arm 38 is, as shown in FIGS. The plate 37, the arm 39, and the sensing rod 40 and the link 41 are connected to the tip portion of the float 14. On the other hand, a linking pin 25b is planted in the cam plate 25 so as to project inward, and the pin 25b can abut and interlock with the arm 38. Also, the pin penetrates and projects to the outside of the cam plate 25, and the pin 25b '
A spring 43 is stretched between the arm 42 and the pin 42 implanted in the arm 39, and urges the pin 25b to abut and interlock with the arm 38. Also, plate 2
Another spring 45 is stretched between the pin 1 and the pin 42, and the spring 45 presses and biases the float 14 toward the rice field. On the other hand, a hydraulic sensitivity adjusting lever 46 is rotatably supported on the plate 21 in the longitudinal direction of the machine body, and the lever 46 is guided by a sensitivity adjusting guide groove 19b of the guide plate 19 and extends laterally of the seat. .. The sensitivity adjusting lever 46 is connected via a Bowden wire 47 to a link length adjusting device 49 provided on the link 41 (see FIG. 2). By operating the adjusting lever 46, the float 14 is tilted forward. Operate the angle, float 1
4. Sensitivity of earth pressure acting on 4 can be adjusted. Note that FIG.
48, 48 in contact with the pin 42, and float 1
4 is a stopper that regulates the movement amount.

A plate 50 is integrally fixed to the plate 21 so as to project obliquely rearward and downward, and the tip of the plate 50 is bent so that the bent portion 50a has a bolt 51.
Is slidably inserted. A spring 52a is contracted between the head of the bolt 51 and the bent portion 50a, and an auto return rod body 52b is fixed inside the bent portion of the bolt 51 and a nut 51c is screwed. As a result, the amount of protrusion of the bolt 51 is regulated so as to be adjustable. Further, a pin 53 fixed to the other end of the rod main body 52b is fitted into the long hole 22d for auto return to allow the cam plate 22 to rotate a predetermined amount, and the movement of the rod main body 52b allows the cam plate 22 to move. Can be forcibly moved from a predetermined or raised position to a fixed position. Also, planting section 1
The lower link 8b of the lifting link supporting 0 is fixedly provided with a lug (pressing portion) 8c (see FIGS. 3 and 8),
The lug 8c comes into contact with the auto-return bolt 51 at a predetermined rising position of the planting part 10 and moves the rod body 52b as the planting part 10 rises. That is, the auto-return rod main body 52b, the bolt 51 and the nut 51c on the base side thereof, and the pin 53 on the tip side thereof are integrated to form the auto-return rod 52, and the bolt 51 on the base end side is a cam. While being movably supported by the plate 50 fixed to the plate 22, the roller 53 on the front end side is engaged with the cam plate 22 as described above. That is, when the link 8b rises, the lug 8c presses one end (bolt 51) of the auto return rod 52 accordingly, and the other end (pin 53) rotationally drives the cam plate 22, The ascending force of the link 8b is directly transmitted as the rotational driving force of the cam plate 22 via the one automatic return rod 52. Further, the lug 8c, the auto return rod 52, and the cam plate 22 are arranged so that their respective operations are all performed within substantially the same vertical plane in the front-rear direction of the traveling machine body 5, which also enables the automatic operation. The force is transmitted more smoothly through the return rod 52. Further, as shown in FIG. 4, a spring 55 is stretched between the operation lever 20 and a pin 54 fixed to the plate 21, and when the auto return is performed, the operation lever 20 is provided on an oblique side surface of the guide groove 19a. It is configured to be guided from the raised position to the fixed position along h. In the figure, reference numeral 56 is the valve operating plate 25.
Is a hook lever for holding the fixed position.

On the other hand, as shown in FIGS. 9 and 10, the operating lever 20 extends further in the lateral direction (inside the body) than the pivot pin 27, and extends vertically in the tip of the extension 20a. The short vertical pin 20b is fixed. Also,
On the upper plate of the plate 21, a marker switching lever 57, which constitutes a marker switching device, is swingably supported around a pin 59 in a horizontal plane. The marker switching lever 5
The cap 5 has a long hole 59a and a long hole 59b formed of an arc centered on the pin 59 on both sides of the pin 59 and further fixed by adjusting bolts 60 and 60.
Engagement hole 57c is formed between 7'and 7 '. The engaging hole 57c is set so that the vertical pin 20b is engaged with the operating lever 20 in the automatic (working) position A of the guide groove 19a.

A support shaft (rotating shaft) 61 is horizontally supported by a lug 21c cut and raised on the upper plate of the plate 21, and the support shaft 61 constitutes left and right marker holding means. The marker stoppers 62 ₁ and 62 ₂ are rotatably supported in parallel in the front-rear direction. The left and right marker stoppers 62 ₁ and 62 ₂ have the same shape and are arranged side by side facing upward, and each has a semicircular stopper cam surface (engaging surface) 63 a centering on the support shaft 61. The protruding member 63 has is fixed by a bolt, and is biased in the counterclockwise direction in FIG. The stopper cam surface 63a is formed to be substantially equal to a circular arc having a radius R centered on the support shaft 61, and during a disengagement (retraction) operation, a marker drive arm 69 described later.
The positions of the abutting portions of the rollers (engaging portions) 70 of ₁ and 69 ₂ and the cam surface 63a hardly change. As a result, the roller 70 is not unduly lifted by the cam surface 63a, and the engagement release (lock release) is smoothly performed. The shape of the cam surface 63a is
Not only the arc shape having the radius R but also the straight line shape approximated to this can obtain substantially the same effect. That is, if the engagement surface 63a is formed in a shape and position such that the force exerted by the engagement portion 70 on the cam surface 63a is directed to the vicinity of the support shaft 61, including during the engagement releasing operation, excellent unlocking can be performed.

These marker stoppers 62 ₁ and 62 ₂ are
The cam surface 63a engages with the roller 70, supports it from below, and holds the marker drive arms 69 ₁ and 69 ₂ at the lock position P ₂ in the standing position P ₃ and the marker drive arm 69 _1.
, 69 ₂ and the inclined position P ₄ for releasing the lock.
Then, connecting rods 66 ₁ and 66 ₂ are connected to the marker stoppers 62 ₁ and 62 ₂ , respectively, and tips 66 a and 66 a of these connecting rods are bent to form left and right elongated holes 59 a of the marker switching lever 57. , 59b. In addition, stopper collars 66b and 66b are respectively fixed to the intermediate portions of the connecting rods 66 ₁ and 66 ₂ to hold the left and right marker stoppers 62 ₁ and 62 ₂ at a predetermined standing position, and at the neutral position of the marker switching lever 57. In, the rod tip 66a is located at one end of the elongated holes 59a, 59b. Further, the spiral spring 65,
An urging force based on 65 acts on the operation lever 20 via the rods 66 ₁ and 66 ₂ and the switching lever 57 to urge the lever to the neutral position n.

A support shaft 67 extending in the horizontal direction is provided at the upper end of the seat column 5b, and the two marker drive arms 69 ₁ and 69 ₂ are parallel to each other on the support shaft 67 in the front-rear direction. It is rotatably supported. These marker driving arms have the same plate-like shape, a roller 70 capable of engaging with the cam surface 63a is rotatably supported by a pin 69a at the tip thereof, and a marker connecting wire is provided at each of the protruding portions thereof. 71 ₁ and 71 ₂ are connected to each other, and a contact portion 69b is formed on the base portion. A marker return arm 72 is integrally fixed to the base of the planting part elevating link 8a, and a roller 72 provided at the tip of the arm 72 is provided.
a is a contact portion 69 of the left and right marker drive arms 69 ₁ and 69 _2.
These arms can be rotated integrally by contacting b. Then, as shown in FIGS. 13 and 14, the left and right marker connecting wires 71 ₁ and 71 ₂ are respectively connected to the left and right markers 17 ₁ and 1 1.
7 ₂ and these markers are urged by springs to the working position where they fall to the left and right, and are switched to the non-working position where they are erected by the pulling action of the wires 71 ₁ and 71 ₂ .

Next, the operation of this embodiment will be described.

In order to carry out planting work with the riding rice transplanter 1, the operator sits on the seat 7 and operates the operation lever 2
0 is operated to the automatic (working) position A. In this state, as shown in FIG. 5, the cam plate 22 rotates integrally with the operation lever 20, the roller 31 of the cam arm 30 is fitted into the large recess a, and the valve is provided in the recess f forming the interchange mechanism. The pin 25a of the operation plate 25 is located. Then, the cam arm 30 is rotated via the rod 33 in a direction to loosen the spring 35, whereby the planted clutch arm 36 is rotated and the planted clutch is connected by its built-in spring.
Further, the valve operating plate 25 can freely rotate without being restricted by the cam plate 22 at the interchange position where the pin 25a does not abut on both side surfaces of the recess f. In this state, the vertical movement based on the earth pressure detection of the float 14 causes the link 41,
The pin 2 that is transmitted to the float interlocking arm 38 via the sensing rod 40, the arm 39, and the plate 37, and is in contact with one side of the arm 38 based on the spring 43.
It is transmitted to the valve operating plate 25 via 5b.

Therefore, the traveling body 5 sinks and the float 1
When the earth pressure acting on the valve 4 increases and the front portion of the float 14 moves upward against the spring 45, the valve operating plate 2
5 operates the hydraulic control valve 23 to the underlap and the raising position of the automatic range, supplies the hydraulic pressure to the hydraulic cylinder device 16 and raises the planting part 10. On the contrary, when the front part of the float 14 moves downward, the valve operating plate 25 operates the valve 23 to the underlap of the automatic range and the lowered position common to the manual range, and drains the hydraulic pressure of the hydraulic cylinder device 16. The planting part 10 is lowered. When the float 14 is in the predetermined neutral state, the valve 23 is in the neutral position of the automatic range, and holds the planting part 10 in that position.
Therefore, in the riding rice transplanter 1, the planting clutch is connected and the planting unit is connected in a state where the planting unit 10 descends above the rice field and is automatically controlled to a predetermined working position based on the earth pressure acting on the float 14. 10 is driven, that is, the seedling stand 12 reciprocates left and right and the planter 11 rotates, so that the seedlings are planted on the rice field at a constant depth.

At this time, the cam plate 22 is held at the automatic position A because the roller 31 is fitted in the large recess a, so that the operating lever 20 integrated with the cam plate 22 is also automatically positioned. Held in. In addition, the operating lever 20
When the roller 31 is operated from the neutral position direction to the automatic position A, the roller 31 is fitted into the large concave portion a from the land portion c through the small convex portion b. At this time, the spring 35 is temporarily moved based on the small convex portion b. Since the spring 35 is stretched and then the spring 35 is contracted at a stretch, the operation of the planting clutch is urged to securely connect and operate. In particular, when the cam arm 30 is connected to the planting clutch arm 36 via a wire, the planting clutch can be reliably operated regardless of the friction of the wire.

Next, as shown in FIG. 6, the operating lever 2
When 0 is operated to the lowered position D, the cam plate 22 also rotates integrally. In this state, the roller 31 of the cam arm 30 is located in the small recess c ₁ of the land c, and the valve operating plate 25
Pin 25a is still located in the interchange recess f. Then, the cam arm 30 rotates in the clockwise direction to extend the spring 35 via the rod 33, and the urging force of the spring overcomes the spring with built-in planting clutch to rotate the planting clutch arm 36. Disengage the clutch and operate. Further, the valve operating plate 25 is in a position where it can move freely, as in the automatic (working) position A, and the planting part 10 is in a descending position where the float 14 is landing on the rice field.

At this time, the urging force of the spring 35 acts on the cam arm 30 as a reaction, and the roller 31
Is pressed into the small recess c ₁ . As a result, the cam plate 22 is held at the lowered position, and the operating lever 20 and the valve operating plate 25 are also held at the position together with the cam plate. Further, when the roller 31 rides on the small concave portion c ₁ of the land portion c, the roller 31 crosses the small convex portion b, but at this time, the spring 35 once expands greatly due to the overstroke of the cam arm 30, and the large load of the spring 35 by this. The planted clutch can be reliably disengaged. Therefore, in this state (down position D), the planting unit 10 is in the predetermined lowered (automatic) state, but the planting clutch is disengaged.

Further, as shown in FIG. 7, the operating lever 20
When is operated to the fixed (neutral) position N, the cam plate 22 also rotates integrally. In this state, the roller 31 of the cam arm 30 is on the land portion c of the cam plate 22, the planting clutch (arm) 36 is in the disengaged state, and one side surface f _{1 of the} recess f is the valve operation. The operation plate 25 is integrally rotated by contacting the pin 25a of the plate 25, and the valve operation shaft 23a
The hydraulic control valve 23 is rotated to the neutral position of the manual operation range via. Then, the valve 23 stops supplying / discharging the hydraulic pressure to stop the hydraulic cylinder device 16. Generally, the fixed position N is operated in the raised state of the planting part 10 and therefore the float 14 of the planting part 10 is in a hanging state,
The descent amount of the float transmitted through the sensing rod 40 and the arm 39 corresponds to the pin 4 fixed to the arm 39.
2 is regulated by coming into contact with a stopper 48 fixed to the seat column 5b.

When the passenger rice transplanter 1 is run on the road,
In order to reliably hold the neutral position N, the hook lever 56 is tilted from the solid line position in FIG. 7 to the chain line position in the neutral state of the operation lever 20. Then, the plate 56 a rotates integrally with the hook 56 and comes into contact with one side surface of the valve operating plate 25. In the this state, the valve operation plate 25 is rotated in the clockwise pin 25a is restricted by contact with the side surface f ₁ of the cam plate 22, and rotation in the counterclockwise direction plates 56a
The valve operating plate 25 is reliably held at the neutral position N by the control.

As shown in FIG. 8, the operating lever 20
When is moved to the raised position U, the cam plate 22 also rotates integrally. In this state, the roller 3 is inserted in the concave portion c _{2 of the} cam plate.
1 is fitted and the pin 25a is in contact with one side surface f ₁ of the recess f due to the spring 43, the cam operating plate 25 is rotated integrally with the cam plate 22 to operate the hydraulic control valve 23. Rotate and operate to the raised position in the manual range. Therefore, the hydraulic control valve 23 changes the hydraulic pressure to the hydraulic cylinder device 16
To raise the planting part 10. Also at this time, the cam arm 30 is also the roller 31 is fitted into the concave portion c _2, recesses c ₂ In the position far from the support shaft 26, a spring 35
Is held in the extended state, and the planted clutch (arm) 3
6 is maintained in the off position, and the pressing force of the roller 31 based on the reaction force of the spring 35 acts on the concave portion c ₂ to cause the cam plate 22 and hence the hydraulic control valve 2 integral therewith.
3 and the operating lever 20 are held in the raised position. At this time, the float 14 hangs down as the planting part 10 rises.
Is regulated by abutting against the stopper 48, and the arm 38 is left at a predetermined position via the plate 37, the pin 25b moves away from the arm 38 and the cam plate 2
It is interlocked by 2.

Then, as the planting section 10 rises, the link 8
When b is rotated upward by a predetermined amount, the lug 8c comes into contact with the auto-return bolt 51. Further, with the rotation of the link 8b, the bolt 51 moves against the spring 52a, and the pin 53 at the tip of the bolt 51 comes into contact with the end of the elongated hole 22d via the rod body 52b to move the cam plate 22 clockwise. Rotate. Then, the positioning and holding due to the roller 31 being fitted into the recess c ₂ is released, and the cam plate 22 is rotated by the upward rotation of the link 8b, which is integrated with the operation lever 2.
0 rotates. At this time, the operating lever 20 moves the pivot pin 27
The lever 20 is rotatably supported in the lateral direction by the spring and the biasing force of the spring 55 causes the lever 20 to move in the guide groove 19
It moves along the oblique side surface h (see FIG. 4) of a, moves from the raised position U to the neutral position N which is the engagement step portion, and stops at the neutral position N. As a result, when the riding rice transplanter 1 reaches the headland, the operator operates the operation lever 20 to the raised position U, and raises the planting unit 10, the planting unit 10 is raised by a predetermined amount, and the above-described automatic operation is performed. The return device functions and is automatically returned to the neutral position N, and the planting part 10 is held at the predetermined raised position.

Next, the left and right line drawing markers 17 ₁ , 17
The switching operation of ₂ will be described. When the riding rice transplanter 1 is in the working state, one of the left and right markers 17 ₁ and 17 ₂ is in the working position in the lying state, and a line is drawn on the unplanted rice field. In the this state, the marker-driving arm 69 ₁ or 69 ₂ which connects to the lodging side of the marker, Figure 1
As shown in 0, the marker drive arm 69 ₂ or 69 connected to the marker in the solid line position and in the upright state.
₁ , the roller 70 has a marker stopper 62 ₂ or 62 ₁
It is held in a chain line state by abutting on the cam surface 63a of the protruding member 63.

Then, when reaching the headland and operating the operating lever 20 to the raised position U as shown in FIG. 11, the planting portion 10 is raised as described above, and the link 8a is moved upward as shown by the solid line. The drive arm 69 ₂ or 69 ₁ in which the roller 72a supported at the tip of the marker return arm 72 that rotates in the direction
Against the contact portion 69b abuts pivots the solid line position the drive arm from the chain line position, in which the winding spring vine said cam stopper roller 70 is brought into contact with the projecting member 63 of the cam stopper 62 ₂ or 62 ₁ The protrusion member 6 is rotated against 65.
When the number exceeds 3, the cam stopper returns to the predetermined standing position by the spiral spring, and the stopper cam surface 63a engages with the roller 70, whereby the marker driving arm 69 ₂
Or 69 ₁ is held in the solid line position. As a result, the drive arm 69 ₂ or 69 ₁ moves the marker 17 ₂ or 17 ₁ from its lying position to the standing position via the wire 71 ₂ or 71 ₁ .

Then, when the planting portion 10 reaches a predetermined raised position, the operation lever 20 is operated by the above-mentioned automatic return device.
Is returned from the raised position U to the fixed position N. As shown in FIG. 12, at the fixed position N and the lowered position D, the planting portion 1
Even if 0 is lowered, the vertical pin 20b at the tip of the operating lever 20
However, it does not engage with the engagement hole 57c of the marker switching lever 57, the left and right marker stoppers 62 ₁ and 62 ₂ are in the standing position, and the rollers 70 of the left and right marker driving arms 69 ₁ and 69 ₂ are stopper cams. The left and right markers 17 ₁ and 17 ₂ are held in an upright state at a position where they abut on the surface 63a.

When the riding rice transplanter 1 has finished traveling on the headland,
When the work is started again, the operation lever 20 moves to the cam plate 22.
Automatically moved to the automatic position A
The planting part 10 descends on the rice field as described above. The automatic position A of the operating lever 20 is as shown in FIG.
As shown in 0, the vertical pin 20b at the tip of the lever engages with the engagement hole 57c of the marker switching lever 57. Then, in this state, as shown in FIG.
At the automatic position A of the guide groove 19a, when the pivot pin 27 is pivoted in the left-right direction along the lateral groove i which is widened in the left-right direction, the tip portion 2 of the lever 20 is bent at a substantially right angle.
The vertical pin 20b provided at 0a swings in the front-rear direction, and the switching lever 57 engaged with the vertical pin 20b swings about the pin 59 in the horizontal plane.

For example, when the operation lever 20 is rotated in the right direction R in FIG. 9, the marker switching lever 57 is rotated counterclockwise and the rod 66 ₁ engaged with the long hole 59a.
Winding the right marker stopper 62 ₁ through the spring 6
5. Rotating against 5, the stopper cam surface 63a of the roller 70
The right elbow is released to allow the right drive arm 69 ₁ to rotate. Then, the right marker 17 ₁ urged to the laid position by the spring lays down to the working position. In addition,
When the switching lever 57 rotates in the counterclockwise direction, the pin 66a of the rod 66 ₂ does not operate at all because the elongated hole 59b only loosely moves. Therefore, the left marker stopper 62 ₂ is in the upright position and the left drive arm 69 is in the upright position. ₂ is in the stopper engagement position, and the left marker 17 ₂ is held in the standing position.

On the contrary, when the operation lever 20 is rotated in the left direction L in FIG. 9, the marker switching lever 57 is rotated clockwise around the pin 59, and the rod 66 ₂ contacts the end of the elongated hole 59b. Moves in contact with the left marker stopper 62 ₂
Rotate. As a result, the left marker drive arm 69 ₂ is freely rotated by releasing the elbow of the stopper cam surface 63a, and the left marker 17 ₂ falls down to the working position. Then, when reaching the headland and operating the operating lever 20 to the raised position U, the marker at the working position is returned to the standing position as described above.

[Brief description of drawings]

FIG. 1 is an overall side view showing a riding rice transplanter to which the present invention is applied.

FIG. 2 is a side view showing the entire operating device.

FIG. 3 is a plan view thereof.

FIG. 4 is a plan view showing an operating portion of a lifting hydraulic pressure and a clutch.

FIG. 5 is a side view showing a planting operation state.

FIG. 6 is a side view showing a state where the planting part is lowered.

FIG. 7 is a side view showing a fixed state of a planting part.

FIG. 8 is a side view showing a raised state of a planting part.

FIG. 9 is a plan view showing a switching operation portion of left and right markers.

FIG. 10 is a side view showing a planting operation state.

FIG. 11 is a side view showing a state where the planting part is raised.

FIG. 12 is a side view showing a fixed state and a lowered state of a planting part.

FIG. 13 is a plan view showing the entire part of the marker operating device.

FIG. 14 is a side view thereof.

[Explanation of symbols]

1 Working vehicle (passenger rice transplanter) 5 Traveling machine 10 Working part (planting part) 17 ₁ , 17 ₂ Marker 20 Operating lever 61 Rotating shaft (support shaft) 62 ₁ , 62 ₂ Marker stopper 63a Engaging surface (stopper cam surface) ) 67 Rotation axis (support axis) 69 ₁ , 69 ₂ Marker drive arm 70 Engagement part (roller) P ₁ operating position P ₂ lock position P ₃ standing position P ₄ tilt position

Claims (1)

[Claims] 1. A traveling machine body and a working unit which is mounted on the traveling machine body so as to be able to move up and down, and a marker operating device is switched and operated by an operating lever, and the markers arranged on the left and right sides of the traveling machine body are appropriately laid down and erected. In the paddy field vehicle, the marker actuating device is swingably supported by a turning shaft, and a marker driving arm that takes an actuating position to lie down the marker and a lock position to raise the marker is provided. A marker stopper that is swingably supported by a shaft and that has an upright position that engages with an engaging portion of the marker drive arm in the lock position and an inclined position that releases the engagement; The stopper has an engagement surface that supports the engagement portion of the marker drive arm in the locked position from below, and the force acting from the engagement portion of the marker drive arm to the engagement surface is the mark. A marker operating device in a paddy field vehicle, wherein the marker operating device is arranged so as to face the rotation axis of the stopper.