JPH05184213A - Operation device in paddy field working vehicle - Google Patents

Abstract

PURPOSE:To improve the assembling accuracy, maintainability, etc., by providing respective devices operated by one operating lever into a subassy arranged in one L-shaped plate. CONSTITUTION:An L-shaped plate 21 is detachably installed in a machine body. The plate is further equipped with a cam plate 22 having an operating lever 20, a hydraulic control valve 23, a valve operating plate 25 directly connected to the valve, a cam arm 3, operated by the cam plate 22 and operating a clutch, further a guide plate 19 and a marker changeover device 76.

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 hydraulic control valve, an operating means for operating the valve and the working clutch, and a mounting structure for a marker switching device.

[0002]

2. Description of the Related Art Generally, a passenger rice transplanter is equipped with an operating lever which can be operated at a manual operation position and an automatic position, and the operation of the operation lever at the manual operation position controls the elevation of a planting section, and At the automatic position of the operation lever, the planting (work) clutch is connected to operate the planting section, and the planting section is automatically moved up and down to the proper planting position by sensing the earth pressure acting on the float. To do. And, the rice transplanter for riding is
When going around, it is necessary to operate the planting part up and down, connect and disconnect the planting clutch, and switch the left and right line drawing markers.

Conventionally, as disclosed in, for example, Japanese Utility Model Laid-Open No. 62-178818, the present applicant has connected the above-mentioned operating lever to a control member composed of a cam plate having a restricting surface and a clutch operating surface, and further, the control member We proposed a control device that can be installed in a riding rice transplanter, which is connected to a hydraulic control valve for raising and lowering the planting section via a continuous drafting member including a continuous drafting rod and an arm.

Further, the applicant of the present invention filed in Japanese Utility Model Publication No. 63-2754.
As disclosed in Japanese Patent Publication No. 1, a single operation lever for operating a hydraulic control valve for controlling the raising and lowering of a planting part is engaged with a yoke of an arm rod at its descending automatic position, and a marker is further attached by the arm rod. Operate the stop pin that holds it in the upright position to
The planting part is controlled to move up and down by operating the book operating lever in the front-back direction, and the stop pin on the marker side corresponding to the left and right markers is released by operating the operating lever in either the left or right direction at the lowered work position, An operation device for a rice transplanter has been devised which is configured to tilt the marker to the operating position.

[0005]

However, in the above-mentioned control device (Japanese Utility Model Laid-Open No. 62-178818), the control member (cam plate) and the operating portion of the hydraulic control valve are arranged separately, and a rod and a rod are provided between them. Since they are connected via a connecting / closing member including an arm, the play of the connecting / closing member increases due to use, and, for example, a deviation occurs between the fixed position of the operating lever and the fixed position of the hydraulic control valve. As a result, the raising / lowering operation of the planting part may be defective. Furthermore, since the mounting part of the hydraulic control valve and the fulcrum of the operating lever are provided on separate members in the frame of the traveling machine body, it is difficult to obtain the assembly accuracy, and the adjusting part is required for the connecting part. It was necessary to mount the above-mentioned member, and there was a problem in terms of accuracy in assembly. Furthermore, in case of partial failure,
When the defective portion is removed and the defective portion is replaced or repaired and attached, connection adjustment with other parts is extremely troublesome, and maintainability is poor.

In addition, the above-mentioned operating device (Jitsuko Sho 63-2)
No. 7541), the control device is arranged such that the hydraulic control valve and the planting clutch can be operated by the operating lever. However, in the operating device, the operating lever portion and the marker switching device are arranged separately. The marker switching device is complicated and large in size, and the compactness is lacking, and it is difficult to employ it in a small rice transplanter or the like. Further, since a linking member such as an arm rod is interposed, there is a possibility that the marker may not operate reliably due to the left and right movement of the operating lever, the assembly accuracy may be difficult to obtain, and the marker switching device and the operating lever may be connected and adjusted. Is troublesome, and the maintainability may be deteriorated.

In view of this, the present invention provides a working vehicle in which the above-mentioned problems are solved by disposing the hydraulic control valve, the operating means for operating the hydraulic control valve and the working clutch, and the marker switching means in one mounting device. The purpose is to provide an operating device.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and a traveling unit (5) has a working section (1).
0) is lifted and lowered by a hydraulic cylinder device (16), the working part is driven through a work clutch (36), and the hydraulic cylinder device is controlled by a hydraulic control valve (23). Left and right markers (1
7 ₁ , 17 ₂ ) are tiltably supported, and switching of the hydraulic control valve (23), the working clutch (36) and the left and right markers (17) is performed by one operation lever (2).
0), in the paddy field vehicle (1), the hydraulic control valve (23), the operating means (75) for operating the hydraulic control valve and the working clutch (36), and the marker switching operation. Marker switching means (7
6) is mounted on one mounting device (21), and the equipment to be mounted and the mounting device are integrated so as to be detachable from the traveling machine bodies (5), (5b). Characterize.

The operating means (75) is provided with the operating lever (20), and the guide plate (19) of the operating lever is provided integrally with the mounting device (21).

[0010]

When the operation lever (20) is operated based on the above-mentioned structure, the working clutch (36) is operated by the operation means (75) to connect and disconnect and the hydraulic control valve (23) is operated. For example, in each of the up (U), fixed (N) and down (D) positions of the operation lever (20), the hydraulic control valve (23) is operated to the corresponding position, and the work clutch ( 36) is disconnected, and when the operating lever (20) is in the automatic position (A), the hydraulic control valve (23) is automatically lifted by a float or the like, and the work clutch (36) is connected. Furthermore, when the operating lever (20) is operated left and right at the automatic position (A), the marker switching device (76) is operated.

The hydraulic control valve (23), the operating means (75) such as the hydraulic control valve, and the marker switching means (76) are integrally attached to a single mounting device (21). The above-mentioned devices are attached to (21), adjusted, and then assembled to the traveling machine body (5, 5b) to be easily assembled. Further, when any part of each of the above-mentioned devices fails, the mounting device (21) can be detached from the body frame (5, 5b) to easily replace or repair the part, and to connect with other devices. Adjustments can easily be made in the removed state.

Further, even if the seat cover (91) is removed,
The guide plate (19) is integrally attached to the attachment device (21), and the operation lever (20) is guided by the guide plate (19) to facilitate maintenance and inspection.

[0013]

As described above, according to the present invention,
Since important parts such as the hydraulic control valve (23) are attached to one attachment device (21), the state in which each device (23), (75), (76) is attached to the attachment device (21) and adjusted. Then, by mounting the mounting device (21) on the traveling machine body (5, 5b), the assembling accuracy can be improved.

Further, since a series of parts such as the hydraulic control valve (23) are mounted on one mounting device (21), the mounting device and the equipment arranged on the mounting device when a part of the parts fails. The rice transplanter (1)
The operation efficiency is improved and maintenance can be ensured for safety.

Further, the operating lever (2) is attached to the mounting device (21).
Since the guide plate (19) for guiding 0) is integrally provided, even if the seat cover (91) is removed, the operation lever (20) is operated as usual to maintain and inspect each device safely. It is easy to do, and the seat cover (9
Since it is not necessary to provide a guide in 1), the seat cover (9
The structure of 1) can be simplified, and the cover (91) can be easily removed and attached.

The reference numerals in parentheses above are for the purpose of comparison with the drawings, but do not limit the structure of the present invention.

[0017]

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

As shown in FIG. 1, the riding rice transplanter 1 has a traveling machine body 5 supported by front wheels 2 and rear wheels 3, and the traveling machine body 5 has an engine 6 mounted at its front end portion. In addition, a driver's seat having a seat 7 at the rear portion is provided. Further, a planting section 10 which constitutes a working section is movably supported behind the traveling machine body 5 via links 8a and 8b, and the planting section 10 has a large number of planters 11, ... A seedling stand 12 is provided. Further, the rear end portion of the traveling body 5 and the upper link 8
A hydraulic cylinder device 16 is disposed between the hydraulic cylinder device 16 and the bracket 15 that is fixed to a.
Up and down. In addition, wire drawing markers 17 ₁ and 17 ₂ are arranged on the right and left sides of the planting section 10 so as to be able to move up and down (see FIG. 1).
6, see FIG. 17).

2 to 6, the driver's seat 9 has a planting part raising / lowering operation lever 2 on the side of the seat 7.
0 is provided, and the operation lever is guided in a guide groove 19a formed in the guide plate 19 on the side of the seat. Further, a bent flat plate member 21 having an upper plate 21c extending horizontally from a bent portion 21b in a front view and a side plate 21a extending vertically in a seat pillar 5b erected on a frame 5a constituting the machine body 5 via a bracket. (Hereinafter referred to as L-shaped plate) is fixed, and is below the upper plate of the plate 21 and inside the side plate, that is, the plate 21.
A hydraulic control valve 23 is disposed on the L-shaped inner side of the valve 23. The operation shaft 23a of the valve 23 has an L-shaped plate 21.
The side plate 21a extends outwardly, and the valve operating plate 25 is fixed there. Also, from the hydraulic control valve 23 to the hose 2
4a, 24b, and 24c extend toward the pump, the tank, and the hydraulic cylinder device 16, respectively, and the vicinity of the valve connection portion of these hoses is, like the hydraulic control valve 23, on the inner side of the L-shaped plate 21. Located and protected. On the other hand, a cam plate 22 forming a part of the operating means 75 is rotatably supported by a support shaft 26 on the side plate 21b 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 by the pin 22a via a pin 27. Therefore, the L-shaped plate 21 constitutes one mounting device for mounting the hydraulic control valve 23, the operating means 75 and the marker switching device 76 which will be described later, and the operating lever 20 includes the support shaft 26.
Thus, the cam plate 22 is supported integrally with the cam plate 22 so as to be rotatable in the front-rear direction of the machine body, and is supported by the pin 27 so as to be swingable in the left-right direction. Further, the cam plate 22, the hydraulic control valve 23, and the valve operation plate 25 are arranged so as to overlap each other in a side view.

FIG. 7 shows the attachment of the L-shaped plate 21 and the receiving material for the components attached to the plate. The L-shaped plate 21 has bolts on the attachment base 87c fixed to the seat column 5b. It is removably attached via. A lug 26a for mounting the cam plate 22 is fixed on the upper plate 21c of the L-shaped plate 21, and a support shaft 46a for supporting a hydraulic pressure sensitivity adjusting lever 46 (described later) and the sensitivity adjusting wire. The support bracket 47b is fixed, and the lever guide plate 19 is further fixed. The guide plate 19
Has a hydraulic sensitivity adjusting lever guide hole 19b and a hydraulic operating lever guide hole 19a. The rear end of the guide plate is attached to the hole 19e of the bracket with the screws 19f and 19h in the hole 19g of the wire support bracket 47b. The front end of the bracket is attached to the side plate 21a with the hole 19c of the bracket by the screw 19d. Further, a marker operation switching arm support bracket 61a and a marker switching operation plate pivot pin 59 are fixed to the upper plate 21c of the plate 21. Further, a support bracket 87a for a marker actuation wire, a stopper mounting seat 87b for a hydraulic actuation feedback link, and a marker actuation arm pivot pin 67 are attached to the seat column 5b. Further, an auto return rod support guide 50 is installed by welding on the plate side plate 21a, and the planter clutch operating arm pivot pin 32 is installed.
Is also installed.

As shown in FIGS. 4 to 6, an operating means 25 including an operating lever 20 and a flat cam plate 22 is provided on the outer side of the plate side plate 21a.
The cam plate 22 is rotatably supported by a pivot shaft 26 pivotally supported by the lug 26a. The flat cam plate 2
Reference numeral 2 denotes an operation lever connecting portion including the lug 22a, a planting clutch operating portion 22b, a hydraulic control portion 22c, and a support shaft 26.
It has an auto-return operation part consisting of a circular arc-shaped long hole 22d. Planting (work) clutch operation part 2
2b is a cam surface that abuts on a roller 31 rotatably supported at the tip of the cam arm 30, and is formed on a large concave portion a into which the roller fits, and from the large concave portion to a small convex portion b to a land portion c. It has a small recess c ₁ and a recess c ₂ formed at the end of the land c. Further, the hydraulic control unit 22c
The valve operating plate 25 has a recess f for receiving the pin 25a, which allows the pin 25a to move within the recess to form an interchange mechanism (automatic range).
The pin 25a abuts to move integrally with the side f ₁ (manual range).

The operating 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 needed.
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 planter clutch operating arm 30 is rotatably supported by a support shaft 32 on the side plate 21a of the plate 21, and the other end of the arm 30 has a long hole 3 therein.
It is connected to a planting clutch arm 36 via a rod 33 having 3a and a spring 35, and the arm 36 operates the planting clutch. Further, the spring 35
Operates the planted clutch against the built-in spring of the clutch, and its reaction is the rod 33 and arm 3
It acts on the clutch operating portion 22b of the cam plate 22 from the roller 31 via 0. Therefore, the clutch operating portion 22b
Serves as a positioning mechanism for holding the cam plate 22 at a predetermined position by operating the planting clutch 36 and pressing the roller 31 urged by the spring 35 into pressure contact. In addition, the cam plate 22 includes the clutch operating portion 22.
In addition to the operation cam surface of the clutch, b also serves as the restriction surface for holding the position, so that it can be made compact and
The restriction surface portion can be assigned to other functions, and functions such as hydraulic control can be enhanced.

A float interlocking arm 34 having an inverted L-shaped side surface is rotatably supported on the valve operating shaft 23a, and the tip of the arm 34 is a plate as shown in FIGS. 3 and 4. 37, arm 39, and sensing rod 4
It is connected to the tip portion of the float 14 via 0 and a link 41. On the other hand, as shown in FIGS. 5 and 6, 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 34. Further, the pin projects through the outside of the cam plate 25, and another spring 45 is stretched between the pin 25b and the pin 42 implanted in the arm 39. 45 pushes and urges the float 14 toward the rice field. On the other hand, a hydraulic pressure sensitivity adjusting lever 46 is supported on the plate 21 so as to be rotatable in the machine longitudinal direction.
The lever 46 is guided by the sensitivity adjusting guide groove 19b of the guide plate 19 and extends laterally of the seat. The sensitivity adjusting lever 46 is connected to the link 4 via a Bowden wire 47.
1 is connected to the link length adjusting device 49 (see FIG. 2), and the forward tilt angle of the float 14 is operated by operating the adjusting lever 46.

A plate 50 is fixed to the plate 21 so as to project obliquely rearward and downward. The tip of the plate 50 is bent, and a bolt 51 is slidably inserted into the bent portion 50a. ing. Head portion and bent portion 50 of the bolt 51
A spring 52 is contracted between the bolt 51 and a, and the rod 52 for auto return is provided inside the bent portion of the bolt 51.
Is fixed and the nut 51c is screwed, and the protrusion amount of the bolt 51 is regulated so as to be adjustable. Furthermore,
A pin 53 fixed to the other end of the rod 52 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 52 causes the cam plate 22 to move to a predetermined position. It can be forcibly moved from a raised position to a fixed position. Further, a lug 8c is fixedly installed on the lower link 8b of the lifting link that supports the planting portion 10 (see FIG. 2,
10), the lug 8 at a predetermined rising position of the planting section 10.
c comes into contact with the bolt 51 for auto return and the planting portion 1
The rod 52 is moved along with the rise of 0. Further, as shown in FIG. 6, a spring 55 is stretched between the operation lever 20 and the pin 26 fixed to the plate 21. When the auto return is performed, the operation lever 20 is slanted to the side surface of the guide groove 19a. It is configured to be guided from the raised position to the fixed position along h. In addition, 5 in FIG.
Reference numeral 6 is a hook lever for holding the valve operating plate 25 in a fixed position.

On the other hand, as shown in FIGS. 6, 12 and 13, the operation lever 20 extends further in the lateral direction (in the body direction) than the pivot pin 27, and the extension 20a has a vertical end. A short pin 20b extending in the direction is fixed.
A marker switching lever 57, which constitutes a marker switching device 76, is supported on the upper side of the upper plate 21c of the plate 21 so as to be swingable in a horizontal plane about a pin 59. The marker switching lever 57 has elongated holes 59a and 59b formed in an arc centered on the pin 59 on both sides of the pin 59, and a cap 57 'fixed by adjusting bolts 60 and 60. Engagement holes 57c are formed between them. The engagement hole 57c is set so that the vertical pin 20b is engaged with the operation lever in the automatic (working) position A of the guide groove 19a.

A support shaft 61 is horizontally supported by a bracket 61a fixed to the upper plate 21c of the plate 21, and the support shaft 61 has marker stoppers 62 ₁ constituting left and right marker holding means. , 62 ₂ are rotatably supported in parallel with 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 in the upward direction, and each of the protrusion members 63 has a semicircular stopper cam surface 63 a centering on the support shaft 61. It is fixed by bolts and is biased in the counterclockwise direction in FIG. 12 by the winding spring 65. Then, connecting rods 66 ₁ and 66 ₂ are connected to the marker stoppers 62 ₁ and 62 ₂ , respectively,
The tips 66a, 66a of these connecting rods are bent,
The marker switching lever is fitted into the left and right long holes 59a and 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 rotate about the support shaft in parallel with the front-rear direction. It is movably supported. These marker driving arms have the same plate shape, and the cam surface 63 is attached to the tip thereof.
rollers 70 engageable in a is rotatably supported by pins 69a, and are respectively connected a marker connecting wires 71 _1, 71 ₂ on the projecting portion, is constituted that the contact portion 69b to further base ing. Also, the link 8 for raising and lowering the planting part
A marker return arm 72 is integrally fixed to the base portion of a, and the roller 72a provided at the tip of the arm 72 abuts on the abutting portions 69b of the left and right marker drive arms 69 ₁ and 69 ₂ , and these The arm can be rotated together. And
As shown in FIGS. 13 and 14, the left and right marker connecting wires 71 ₁ and 71 ₂ are connected to the left and right markers 17 ₁ and 17 ₂ , respectively.
, And these markers are biased by springs to the working position in which they fall to the left and right, and are switched to the non-working position in which they are erected by the pulling action of the wires 71 ₁ and 71 ₂ .

On the other hand, a step cover 90 is placed and fixed on the machine body frame 5a as shown in FIG. The step cover 90 is integrally formed of plastic, an opening 90a for the engine 6 is formed in the front, and an opening 90b for the seat 7 is formed in the rear.
Furthermore, both sides of the engine opening 90a, both openings 90a, 9
A substantially flat step surface is formed between 0b, and step surfaces having an upward slope toward the rear are formed on both sides of the seat opening 90b. A seat cover 90 also made of plastic is attached to the seat opening 90b. The seat cover 9
1 is composed of two-divided structures 91a, 91b divided at the center 93, and the central portion 93 and the lower end portion 94 are edged, and the edge portions 93, 94 are provided with screws 95 or the like.
The two divided parts are combined together and attached to the step cover 90. And the seat cover 91
A relatively large rectangular hole 92 is formed on one side of the so as to face the guide plate 19.

Next, the operation of this embodiment will be described.

To plant the riding rice transplanter 1, the operator operates the operating lever 20 to the automatic (working) position A while sitting on the seat 7. 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. Operation board 2
5 pin 25a 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. Also,
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 of the float 14 based on the earth pressure sensing is transmitted to the float interlocking arm 34 via the link 41, the sensing rod 40, the arm 39 and the plate 37, and further the spring 43 causes the arm 34 to move. It is transmitted to the valve operating plate 25 via the pin 25b that is in contact with one side of the valve operating plate 25.

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 lever 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. 9, 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. 10, the operating lever 2
When 0 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 the recess f
One side surface f ₁ of the valve operation plate 25 abuts on the pin 25a of the valve operation plate 25, and the operation plate 25 is integrally rotated.
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 with the planting part 10 raised, so that the planting part float 14 is in a hanging state, but the float of the float transmitted through the sensing rod 40 and the arm 39. The descending amount is determined by the pin 42 fixed to the arm 39.
Are regulated by abutting on the stopper 48 fixed to the seat column 5b.

When the passenger rice transplanter 1 is run on the road,
To securely hold the neutral position N, the hook lever 56 is tilted from the solid line position in FIG. 9 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.

Further, as shown in FIG. 11, the operating lever 2
When 0 is operated to the raised position U, the cam plate 22 also rotates integrally. In this state, the roller 31 is fitted in the concave portion c _{2 of the} cam plate, and the concave portion f is formed by the spring 43.
In the one side surface f ₁ of the state where the pin 25a is in contact, by rotating the camming plate 25 integrally with the cam plate 22 rotates and operation to the raised position of the manual range pressure control valve 23. Therefore, the hydraulic control valve 23 changes the hydraulic pressure to the hydraulic cylinder device 1.
6 to raise the planting part 10. Also at this time, the cam arm 30 is also fitted roller 31 in the recess c _2, recesses c ₂ In the position far from the support shaft 26, the spring 3
5 is held in the extended state, and the planted clutch (arm)
While keeping 36 in the off position, 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 abutted on the stopper 48, and the arm 34 is left at a predetermined position via the plate 37, the pin 25b is separated from the arm 34 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, as the link 8b rotates, the bolt 51 moves against the spring 52,
The pin 53 at the tip of the rod 52 contacts the end of the elongated hole 22d through the rod 52 to rotate the cam plate 22 in the clockwise direction. Then, the positioning and holding due to the roller 31 being fitted into the concave portion c ₂ is released, the cam plate 22 is rotated by the upward rotation of the link 8b, and the operation lever 20 is rotated integrally with this. At this time, the operation lever 20 is laterally rotatably supported by the pin 27 and the biasing force of the spring 55 causes the lever 20 to move along the oblique side surface h (see FIG. 4) of the guide groove 19a. ., From the raised position U to the neutral position N, which is an engagement step, 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. In the working state of the riding rice transplanter, _one of the left and right markers 17 ₁ and 17 ₂ is at the working position in the laid state, and a line is drawn on the rice field on the unplanted side. In this state, the marker drive arm 69 ₁ or 69 ₂ connected to the marker on the laid side is shown in FIG.
As shown in, the marker driving arm 69 ₂ or 69 ₁ connected to the marker in the solid line position and in the upright state.
Means that 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. 14, the planting portion 10 rises as described above, and the link 8a moves 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 it exceeds 3, the cam stopper returns to the predetermined upright position by the spiral spring, and the stopper cam surface 63a moves to the roller 7
By engaging 0, the marker drive arm 69 ₂ or 69 ₁ is held in the solid line position. As a result, the drive arm 69 causes the marker 17 _{2 to} pass through the wire 71 ₂ or 71 _1.
Alternatively, 17 ₁ is moved from its lying position to the standing position.

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. 15, in the fixed position N and the lowered position D, the vertical pin 20b at the tip of the operation lever 20 is used even if the planting portion 10 is lowered.
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 rice transplanter 1 for passengers 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 FIG. 3, 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.
Is rotated about the pin 27 in the left-right direction along the lateral groove i extending in the left-right direction at the automatic position A of the guide groove 19a, the tip portion 2 of the lever 20 bent substantially at a 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 to the right R in FIG. 12, the marker switching lever 57 is rotated counterclockwise and the rod 66 engaged with the elongated hole 59a.
_The right marker stopper 62 ₁ is rotated via the ₁ against the spiral spring 65, and the stopper cam surface 63 of the roller 70 is rotated.
The pivotal elbow is released by allowing 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. Note that depending on the counterclockwise rotation of the switching lever 57,
The pin 66a of the rod 66 ₂ does not operate at all because the long hole 59b only loosely moves. Therefore, the left marker stopper 62 ₂ is in the standing position, the left drive arm 69 ₂ is in the stopper engaging position, and the left marker 17 ₂ Are held in a standing position.

On the contrary, when the operation lever 20 is rotated in the left direction L in FIG. 12, the marker switching lever 57 is rotated clockwise around the pin 59, and the rod 62 ₂ contacts the end of the long hole 59b. Moves in contact with the left marker stopper 62.
Rotate ₂ . As a result, the left marker drive arm 69 ₂
Is released from its free elbow by the stopper cam surface 63a and is freely rotated, 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.

Then, in the assembling work of the main rice transplanter 1, the L-shaped plate 21 is provided with a cam plate 22 having an operating lever 20 attached to its side plate 21a, a clutch operating cam arm 30, a valve operating plate 25, and an automatic return device. Fifty,
51, 52, an operation means 75 including the sensitivity adjusting lever 46 and the guide plate 19, a marker switching device 76 is attached above the upper surface 21c, and a hydraulic control valve 23 is attached inside the plate. After the components are adjusted in this state, the plate 21 is attached to the seat column 5b. That is, the operating device is a sub-assembly, and the sub-assembly may be assembled to the traveling machine body 5, which improves the assembly accuracy and
Easy to assemble.

When some of the parts fail, the L-shaped plate 21 is removed from the seat column 5b, and the failed part is replaced or repaired in that state, and the connection relationship between the parts is adjusted. As long as the L-shaped plate 21 is attached to the column 5b again, maintenance can be easily performed.

Further, since the guide plate 19 is fixed to the plate 21 even when the seat cover 91 that covers and protects each device attached to the L-shaped plate 21 is removed, By guiding the elevating operation lever 20 and the sensitivity adjusting lever 46 to the guide plate 19, maintenance and inspection of each device can be performed safely and easily.

[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 a main part of the operating device.

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

FIG. 6 is a front view thereof.

FIG. 7 is an exploded perspective view showing a state where each component is attached to the L-shaped plate.

FIG. 8 is a perspective view showing a step cover and a seat cover.

FIG. 9 is a side view of the operating device, showing a state where the planting part is lowered.

FIG. 10 is a side view showing a fixed state of the planting part.

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

FIG. 12 is a plan view showing a switching operation portion between left and right markers.

FIG. 13 is a side view showing a planting operation state.

FIG. 14 is a side view showing a state where a planting part is raised.

FIG. 15 is a side view showing a fixed state and a lowered state of the planting part.

FIG. 16 is a plan view showing the entire part of the marker operating device.

FIG. 17 is a side view thereof.

[Explanation of symbols]

1 Working vehicle (passenger rice transplanter) 5 Traveling vehicle 5b Traveling vehicle (seat support) 10 Working part (planting part) 16 Hydraulic cylinder device 17 ₁ , 17 ₂ Left and right markers 19 Guide plate 20 Operating lever 21 Mounting device (L-shaped lever) ) 21a Side plate 21c Upper plate 22 Cam plate 23 Hydraulic control valve 25 Bar operating plate 30 Clutch operating cam arm 36 Work (planted) clutch (arm) 75 Operating means 76 Marker switching device 91 Seat cover

Claims (2)

[Claims] 1. A working unit is lifted and supported by a traveling machine body by a hydraulic cylinder device, the working unit is driven via a working clutch, and the hydraulic cylinder device is controlled by a hydraulic control valve. A hydraulic control valve for a paddy work vehicle in which left and right markers are erected and supported on both sides of a section, and switching between the hydraulic control valve, the work clutch, and the left and right markers is operated by one operating lever. An operating means for operating the hydraulic control valve and the working clutch, and a marker switching means for switching the marker, are arranged in one mounting device, and the mounted device and the mounting device are integrated,
An operating device for a paddy field vehicle, wherein the operating device is detachable from the traveling machine body. 2. The operating means comprises the operating lever,
The operation device for a paddy field vehicle according to claim 1, wherein a guide plate for the operation lever is integrally provided on the attachment device.