JP2000112554A - Lever position detecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To predict the next target operating position before an operation lever is operated at the next operating position. SOLUTION: This lever position detecting device is provided with a manual operation lever 17 arranged so as to be freely operatable and a potentiometer for detecting the operating position of this manual operation lever 17 along a lever guide. The detected value of this potentiometer is divided into specific areas E1, E3, E5, and E7 including operating positions P1, P3, P5, and P7 arranged along the operating direction of the manual operation lever 17 and intermediate areas E2, E4, and E6 arranged among the specific areas E1, E3, E5, and E7. A control part detects the movement of the manual operation lever 17 to the intermediate area E4 between the specific area E3 in which the manual operation lever 17 is positioned and the specific area E5 including the next target operating position P5 based on the detected value from the potentiometer, and detects the operating direction in an early stage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lever position detecting device, and more particularly to a lever position detecting device capable of predicting a target next operation position by judging an operation direction of an operation lever.

[0002]

2. Description of the Related Art As shown in FIG. 12, for example, the raising / lowering control of a planting section 10 supported by a riding rice transplanter 1 is performed by a hydraulic / planting lever 17 provided on a side portion of a seat 7. When the hydraulic / planting lever 17 is operated to the “down” or “planting” position, the float 14 of the planting section 10 is moved.
The planting section 10 is automatically moved up and down so that the planting section 10 is at an appropriate planting position by sensing the earth pressure acting on the plant.

That is, as shown in FIG. 12 and FIG. 13, the hydraulic / planting lever 17 is operated along a lever guide 21 to respective positions of “up”, “fixed”, “down”, and “planting”. Then, the flat cam 30 rotates about the support shaft 31 and the hydraulic control valve 3
5, the hydraulic cylinder (not shown) is controlled by the hydraulic control valve 35, and the planting section 10 supported by the lifting link mechanism 8 is controlled to move up and down.

At this time, in the hydraulic automatic state where the planting section 10 is lowered, when the earth pressure acts on the float 14 and the front portion thereof is lifted, the sensing plate 22, the swing arm 27 and the sensing rod 24 are lifted. , The lever arm 71 swings about the pivot connecting portion 23, and moves the hydraulic control valve 35 to the automatic raising position via the continuous traction link 49 to raise the planting portion 10. When the earth pressure acting on the float 14 is small and its front part is lowered, the hydraulic control valve 35 is moved to the automatic lowering position to lower the planting part 10.

[0005]

Conventionally, in order to determine the position of the hydraulic / planting lever 17 which is currently being operated, for example, as shown in FIG.
Threshold values (A, B, C) are provided between the positions of “fixed”, “down”, and “planting”, and when the hydraulic pressure / planting lever 17 passes these thresholds, the hydraulic pressure / planting is performed. The current position of the attached lever 17 has been determined. Therefore, the position determination of the hydraulic pressure / planting lever 17 after the lever operation is delayed, and the subsequent processing is delayed.

That is, the object to be controlled by operating the hydraulic / planting lever 17 is basically a flat cam 30.
(Furthermore, the hydraulic control valve 35). However, line marker control, automatic horizontal control, and the like are performed based on the fact that the cam position of the flat plate cam 30 has been moved to a predetermined position. Then, the subsequent control operation is delayed.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to predict a target next operation position before the operation lever is operated to the next operation position. Accordingly, it is an object of the present invention to provide a lever position detecting device capable of promptly starting control corresponding to a next operation position.

[0008]

In order to achieve the above object, the invention according to claim 1 comprises an operation lever (17) movable along a guide (21) and an operation lever (1).
7) A detection sensor (5) for detecting the operation position in the operation direction
Including 8), the detection value of the detection sensor (58), a plurality of operating positions that are arranged along spaced apart in the operation direction of the operating lever _{(17) (P 1, P} 3, P 5, P 7) Specific area (E _1, E _3,
And E _5, E _7), and the specific region _{(E 1, E 3, E} 5, E 7) an intermediate region which is provided between _{(E 2, E 4, E} 6), the divided, detection sensor based on a detection value from (58), said operating lever (17) is specific area was located _{(E 1, E 3, E} 5, E
_7), the next operating position the operating lever (17) is a target _{(P 1, P 3, P} 5, the specific area (E ₁ of _{P 7), E 3, E} 5, E
The intermediate region _{(E 2, E 4, E} 6) between _7), the specific area in which the operating lever (17) was located (E _1, E _3, E
By detecting the moving from _5, E _7), provided to determine the operating direction of the operating lever (17), and a control unit for starting the control corresponding to the next operation position (39), the It is characterized by having.

According to a second aspect of the present invention, the intermediate area is divided into a plurality of sections, and the specific area (E1 _, E) of the intermediate area is divided.
_5, E _9, E ₁₃₎ to the back adjacent detection regions _{(E 2, E 4, E} 6,
E _{8 ,} E _10, E ₁₂ ) are provided, and the control section (39) controls the specific region (E) in which the operation lever (17) is located in front.
_1, E _5, E _9, the return detection region from _{E 13) (E 2, E} 4, E
_6, E _{8 ,} E _10, E ₁₂ ), and returns to the target detection area (E _1, E _5, E _9, E ₁₃ ) again without operating the return detection area (E). _2, E _{4 ,} E _6, E _{8 ,} E _10, E
₁₂ ) When the operation lever (17) is detected,
The prediction of the next operation position is canceled.

The invention according to claim 3 is characterized in that the operation lever (17) is positioned and held at the respective operation positions by a detent mechanism (70, 33a).

According to the present invention, the operation lever (17) arranged to be movable along the guide (21) and the operation lever (1) are provided.
7) A detection sensor (5) for detecting the operation position in the operation direction
8) have a detection value of the detection sensor (58), said operating lever (17) a plurality of operating positions that the operation along the direction located apart from the _{(P 1, P 3, P} 5, P ₇ ) and a specific region (E _1, E _3, E _5, E ₇ ) including the specific region (E _1, E _{3 ,
E 3, E 5, E 7} ) an intermediate region which is provided between (E _2, E _4, E
₆ ).

In the control section (39), based on the detection value from the detection sensor (58), for example, the specific area (E ₃ ) where the operation lever (17) is located and the operation lever (17) the intermediate region (E ₄₎ between but the specific region of the next operating position to a target (P ₅₎ (E _5), from the specific area in which the operating lever (17) was located (E ₃₎ By detecting the movement, the operation direction of the operation lever (17) can be predicted at an early stage. Thus, for example, it is possible to quickly start line marker control, horizontal automatic control, or the like, which is control corresponding to the next operation position (P ₅ ).

Note that the reference numerals in parentheses described above are shown for reference to the drawings, and do not limit the invention specifying matter of the present invention at all.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. Members that are the same as or correspond to those of the above-described conventional example are denoted by the same reference numerals.

FIG. 1 shows a riding rice transplanter 1 to which the present invention is applied. The riding rice transplanter 1 has a traveling machine body 5 supported by a front wheel 2 and a rear wheel 3.
An engine 6 is mounted in a hood 4 at a front portion of a front wheel, and a driver's seat 9 having a seat 7 is disposed at an intermediate portion of the traveling body 5 in the front-rear direction. Behind the traveling machine body 5, a planting section 10 as a working section is supported via a lifting link mechanism 8 so as to be able to move up and down freely, and a large number of planters, floats 14 and mat seedlings are placed on the planting section 10 up and down. A seedling mounting table 12 that can be mounted in the direction is provided.

A hydraulic cylinder device 19 is disposed between the traveling machine body 5 and the lifting link mechanism 8, and based on an operation of a manual operation lever 17 provided on the side of the seat 7, the seat seat is provided. 7 Lower hydraulic control valve 3
5 is controlled, and the hydraulic cylinder device 19 is controlled to expand and contract by the hydraulic control valve 35, so that the planting section 10 moves up and down.

That is, as shown in FIGS. 1 to 3, a manual operation lever 17 is provided on the driver's seat 9 beside the seat 7 so that the planting section 10 can be manually moved up and down. This manual operation lever 17 is used for the rear cover 2.
Along the lever guide 21 formed at No. 6, it can be operated to respective positions of "raise", "fix", "lower (automatic)", and "planting".

The planting section 10 is raised to a predetermined height by operating the manual operation lever 17 to the "up" position, and the planting section 10 is moved to that position by operating the "fixed" position. In a state in which the planting section 10 is lowered to a predetermined height by stopping and operating the “lowering (automatic)” position, and the planting section 10 is lowered to a predetermined height by operating the “planting” position. Control to engage the work machine clutch is performed.

Here, the connection mechanism between the manual operation lever 17 and the hydraulic control valve 35 will be described. As shown in FIGS. 2 and 3, the rear cover 26 below the seat 7 is provided with a connection mechanism 50 via a connection mechanism 50. Thus, when the hydraulic control valve 35 is connected and the manual operation lever 17 is operated, the hydraulic control valve 35 is controlled via the connecting mechanism 50.

The coupling mechanism 50 is integrally attached to a support shaft 31 having a base end supported by the body frame 16 and a free end supported by a positioning cam 33, and the manual operation lever 17. It has a lever member 69 arranged substantially parallel to the support shaft 31. This lever member 69
A tongue piece 69a protrudes from one end of the cam, and a roller 70 is attached to the other end. The roller 70 is engaged with the corrugated portion 33a of the positioning cam 33. Thus, the roller 70 and the corrugated portion 33a form a detent mechanism for the manual operation lever 17. on the other hand,
The flat cam 30 and the sleeve 68 are loosely fitted on the support shaft 31, and the sleeve 68 has tongue pieces 68a, 68b.
Are protruding respectively. The connecting mechanism 50 includes the flat plate cam 30, the sleeve 68, and the tongue pieces 68a, 68b, and 69.
a.

The tongue piece 68a and the tongue piece 69a of the lever member 69 are fixed by bolts (not shown), and the tongue piece 68b and the flat cam 30 are bolted to each other.
And a nut 53.

As described above, the manual operation lever 17 is
When the user moves to the positions of “up”, “fix”, “lower (automatic)”, and “plant” along the lever guide 21, the roller 70 attached to the end of the lever member 69 causes the waveform of the positioning cam 33 to move. It rotates around the support shaft 31 along the portion 33a, and is positioned and held at the respective operation positions by the detent mechanisms 70 and 33a.

On the other hand, a valve operating plate 36 is fixed to the operating shaft 35a of the hydraulic control valve 35, and the flat cam 30 and the hydraulic control valve 35 and the valve operating plate 36 are overlapped in a side view. Are located in The valve operation plate 36 includes:
A pin 36a is implanted, and the flat cam 30 is formed with a concave portion f that can contact the pin 36a. Then, the pin 36a is allowed to move within the concave portion f to form an accommodation mechanism (automatic range). When the pin 36a contacts one side surface of the concave portion f, the pin 36a
And move together.

Thus, when the manual operation lever 17 is rotated, the manual operation lever 17 and the lever member 69 are rotated.
Rotates about the support shaft 31. At this time, the flat plate cam 30 is rotated by the tongue piece 68b attached to one end of the lever member 69, and the roller 70 attached to the other end is kept engaged with the corrugated portion 33a of the positioning cam 33. Pivoted to and held at that position. In a state where the manual operation lever 17 is integrally fixed to the sleeve 68, the manual operation lever 17 and the flat plate cam 30 loosely fitted to the support shaft 31 are separated from each other so that assembly and the like are simplified. They are located adjacent to each other.

According to the present invention, an operation lever 17 movable along a guide, a detection sensor for detecting an operation position of the operation lever 17 in an operation direction, and an operation direction of the operation lever 17 are determined, and the following operation is performed. A control unit that starts control corresponding to the operation position.

As shown in FIGS. 3 and 4, the manual operation lever 17 is movable along the guide 21. The sleeve 68 has a connecting member 54 and a lever member having an elongated hole 56a. A potentiometer 58 is mounted via a potentiometer 56.
8, the operation position of the manual operation lever 17 is detected.

On the other hand, as shown in FIG. 5, the detection value of the potentiometer 58 is determined by a plurality of operating positions P ₁ (“raising”), P ₃ (“ fixed "), P ₅ (" down "), P ₇
Specific areas E ₁ , E ₃ , E ₅ , E ₇ including (“planting”)
And intermediate areas E ₂ , E ₄ and E ₆ provided between the specific areas E _1, E _3, E _{5 and} E ₇ . Then, in the controller 39, based on the detection value from the potentiometer 58 described above, the manual operation lever 17 specific area E ₁ having been positioned _{is, E 3, E 5, E} 7, and the operating lever 17, the target to the intermediate region E _2, E _4, E ₆ between a particular region in the next operating position _{P 1, P 3, P 5} , P 7, be moved from a specific area in which the operating lever 17 is located the by detecting, to determine the operating direction of the manual operating lever 17, the next operating position _{P 1, P 3, P 5} , which starts control corresponding to P _7.

The corresponding control in this case includes, for example, line marker control and horizontal automatic control. Further, when the manual operation lever 17 is operated to the "planting" position, the hydraulic pressure is raised and lowered by operating a hand operation lever 38 described later. Control.

FIG. 6 shows a flowchart in the present embodiment.

In the figure, the potentiometer 5 is set at S1.
8 the current value of the manual operation lever 17 is detected by, if a range that the current value of the intermediate region E _4, in S2,
It is determined in which region the value detected by the potentiometer 58 last time was located. And if the last time was in the specific area E _3, the operating lever 17 as being operated in the direction of E ₄ from E _3, P ₅ the following the target position in S3 ( "down" ). Further, if the detection value is a specific region E ₅ of the last potentiometer 58 in S2, as the operating lever 17 which is operated in the direction of E ₄ from E _5, the following operations a target position in S4 Predict P ₃ (“fixed”). Further, in S2, the previous detection value of the potentiometer 58 is changed to the specific regions E ₃ and E ₃ .
If it is other than ₅ , the operation direction is unknown and the process returns to the beginning.

Further, if the current value is at the intermediate areas range smaller than E ₄ of the manual operation lever 17 in S1, in S5, it is determined the current value of the potentiometer 58 again.
Then, if the range that the current value of the specific region E _1, S
At 6, the operation position of the lever is set to P ₁ (“raise”). Further, if the range current value of the specific region E ₃ of the operating lever 17, the operating position of the lever in S7 and P ₃ ( "fixed"). Further, in S5, if the range current value of the potentiometer 58 of the intermediate region E _2, the process proceeds to S8, where there was a which region detection value of the previous potentiometer 58 is determined.

[0032] Then, if the last time was in the specific area E _1, the operating lever 17 as being operated in the direction of E ₂ from E _1, the following operations position P ₃ as a target in S9 ( "Fixed"). Further, if the detection value is a specific region E ₃ of the last potentiometer 58 in S8, as the operating lever 17 that is operated toward the E ₃ in the direction of E _2, the following operations a target position in S10 Predict P ₁ (“raise”). Further, in S8, the previous detection value of the potentiometer 58 is changed to the specific areas E ₁ , E ₃
Otherwise, the operation direction is unknown and the process returns to the beginning.

Next, if the current value is greater extent than the middle area E ₄ of the manual operation lever 17 in S1, in S11, it is determined the current value of the potentiometer 58 again. Then, the if the current value in the range of the specific area E _5, the operating position of the lever in S12 and P ₅ ( "down"). Further, the current value of the operation lever 17 is set in the specific area E _7.
, The operation position of the lever is set to P ₇ (“planting”) in S13. Further, in S11, if the range current value of the potentiometer 58 of the intermediate region E _6, S14
Then, it is determined in which region the value detected by the potentiometer 58 last time was located.

If the previous operation was in the specific area E ₇ , it is assumed that the operation lever 17 has been operated in the direction from E ₇ to E ₆ , and the next operation position targeted in S 15 is set to P ₅ ( "Lower"). Further, if the detection value is a specific region E ₅ of the last potentiometer 58 in S14, as the operating lever 17 which is operated in the direction of E ₆ from E _5, the next operating position to the target step S16 Predicted to be P ₇ ("planting"). Further, in S14, the previous detected value of the potentiometer 58 is changed to the specific area E ₅ ,
If it is other than E _7, operation direction is returned to the first as unknown.

According to the present invention, the intermediate area is divided into a plurality of sections, and a return detection area is provided adjacent to the specific area of the intermediate area.
In the state where it has passed through the return detection area from the specific area that was located before, when it is detected that it is in the return detection area again without being operated on the target next specific area,
The prediction of the next operation position of the operation lever 17 is canceled.

In FIG. 7, the detected value of the potentiometer 58 is determined by a plurality of operating positions P ₁ (“raising”) and P ₅ that are spaced apart along the operating direction of the manual operation lever 17.
(“Fixed”), specific areas E ₁ , E ₅ , E ₉ , E ₁₃ including P ₉ (“down”), P ₁₃ (“planting”) and the specific areas E
₁ , E ₅ , E _{9 ,} E _3, an intermediate area provided between E ₉ , E ₁₃
E _{4 ,} E _6, E _7, E _{8 ,} E _10, E _11, E _12, and the specific regions E ₁ , E 2
_5, E _9, region E ₂ adjacent to _{E 13, E 4, E 6} , E 8, E
_10, E ₁₂ is provided as a return detection region.

In the control section 39, the manual operation lever 17 is located in the specific area E ₁ , E ₅ , E
_9, the E _13, the return detection region _{E 2, E 4, E 6} , E 8,
While passing through the E _10, E _12, in a state that is not operated in the following specific areas of the target when it detects that there again the original return detection region, canceling the prediction of the next operation position of the operation lever 17 I do. In other words, after operating the manual operation lever 17 once in either direction, the operating lever 17 again by the return operation of the original return detection region _{E 2, E 4, E 6} , E 8
_, When it comes back to the E _10, E _12, the control unit 39,
The specific area E ₁ where the manual operation lever 17 was located in front,
As being operated _{E 5, E 9, E 13} , performs control corresponding to the operation position _{P 1, P 5, P 9} , P 13.

FIG. 8 and FIG. 9 show flowcharts in the present embodiment.

[0039] In the figure, S20 current value of the manual operation lever 17 is detected by the potentiometer 58, that if the current value range of the return detection region E _8, in S21, which region is the detected value of the last potentiometer 58 Is determined. And last time, the specific area E
If there was to _9, the operating lever 17 is predicted as being operated in the direction of E ₈ from E _9, the following operations a target position in S22 P ₅ (the "fixed").

In step S21, the previous potentiometer 5
If the detected value of 8 is an intermediate region E _7, the manual operation lever 1
7 returns from the specific area E ₉ located before and the detection area E
₈ and returned to the return detection area E ₈ again without being operated to the next target specific area E ₅ , the operation position of the operation lever 17 is changed to the original operation position P ₉ (“ Lowering ”). Furthermore, if other than the detection value region E _7, E ₉ previous potentiometer 58 in S21, the operation direction is returned to the initial as unknown.

In step S20, the current value of the manual operation lever 17 is adjusted by the potentiometer 58 to the return detection area E _8.
If it is smaller than the range, the current value of the potentiometer 58 is determined again in S24. Then, the if current value is the return detection region E ₄ range, in S25, there was a detection value which region the previous potentiometer 58 is determined. Here, if the last time was in the specific area E _5, the operating lever 17 as being operated in the direction of E ₄ from E _5, the next operating position to P ₁ ( "up to the target in S26 )).

In step S25, the previous potentiometer 5
If the detected value of 8 is an intermediate region E _3, the manual operation lever 1
7 the detection region E returns from a particular area E ₅ which was located in front
₄ through the following as being returned to the return detection region E ₄ again in a state of not operated in a specific region E _1, the original operating position P ₅ the position of the operating lever 17 in S27 that the target ( " Fixed ”). Further, if the last detected value of the potentiometer 58 is other than the areas E ₃ and E ₅ in S25, the operation returns to the beginning as the operation direction is unknown.

In step S24, the potentiometer 5
If the current value of 8 is less than the range of the return detection region E _4, in S28, the current value of the potentiometer 58 is determined. If, if the current value is returned detection region E ₂ in the range of the potentiometer 58, the process proceeds to S29, where there was a which region detection value of the previous potentiometer 58 is determined. Then, the previous potentiometer 58
If the detected value of the a region E _3, the manual operation lever 17
Returns from the specific area E ₁ located before and the detection area E ₂
Through the following identified as returned in the return detection region E ₂ again in a state which is not operated in the region E _5, the original operating position P ₁ the operating position of the operating lever 17 in S30 ( "up to the target )).

[0044] Further, in S29, the detection value of the previous potentiometer 58 if there was a region E _1, as the operating lever 17 which is operated in the direction of E ₂ from E _1, is targeted step S31 follows Operation position to P ₅
(“Fixed”), and the previous detected values are in the regions E ₁ and E ₃
Otherwise, the operation direction is unknown and the process returns to the beginning.

[0045] In S28, if the current value is the specific area E ₁ of the range of the potentiometer 58, in S32, the position of the operating lever 17 and the operating position P ₁ ( "up"), and in S28, current potentiometer 58 operation direction if the value range of the specific region E ₃ is returned to the initial as unknown.

In step S24, the potentiometer 5
If 8 larger than the current range value of the return detection region E ₄ of the S33, the current value of the potentiometer 58 is determined. If, if the current value is returned detection area range E ₆ of the potentiometer 58, the process proceeds to S34, where there was a which region detection value of the previous potentiometer 58 is determined. Then, the previous potentiometer 58
If the detected value of the a region E _5, the manual operation lever 17
Detection region E ₆ but returns from a particular area E ₅ which was located in front
, The target next operation position is set to P in S35.
₉ (“down”).

In S34, the last potentiometer 5
If the detected value of 8 is an intermediate region E _7, the manual operation lever 1
7 the detection region E returns from a particular area E ₅ which was located in front
Through _6, the following identified as returned in the return detection region E ₆ again in a state which is not operated in the region E _9, the original operating position P ₅ the position of the operating lever 17 in S36 that the target ( " Fixed ”). Furthermore, if other than the detection value of area E _5, E ₇ the last potentiometer 58 in S34, the operation direction is returned to the initial as unknown.

[0048] In S33, if the current value range of the specific area E ₅ of the potentiometer 58, the process proceeds to S37, the position of the operating lever 17 and the operating position P ₅ ( "up"), and in S33, the potentiometer 58 the current value range if the operating direction of the intermediate region E ₇ initially returns as unknown.

Next, step S20 described above, if the current value is larger than the range of the region E ₈ of the potentiometer 58, the process proceeds to S38, where it is determined the current value of the potentiometer 58 again. Then, the current value of the potentiometer 58 proceeds to S39 if the range of the region E _10, wherein there was a which region the detection value of the previous potentiometer 58 is determined. And if the detection value of the previous potentiometer 58 is a region E _9, as the operating lever 17 which is operated in the direction of E ₁₀ from E _9, P ₁₃ the next operating position to the target at S40 ("Planting").

In step S39, the previous potentiometer 5
If the detected value of 8 is an intermediate region E _11, the manual operation lever 1
7 returns from the specific area E ₉ located before and the detection area E
_In S41, the operation position of the operation lever 17 is returned to the original operation position P ₉ (“10”) assuming that the operation lever 17 has been returned to the return detection area E ₁₀ again without being operated to the next target specific area E ₁₃ through the operation. Lowering ”). Further, if the previous detected value of the potentiometer 58 is out of the areas E ₉ and E ₁₁ in S39, the operation direction is returned to the beginning as unknown.

[0051] In S38, the current value of the potentiometer 58 is larger than the range of the region E _10, the process proceeds to S42, where again determines the current value of the potentiometer 58. Then, the process proceeds to S43 if the current value is returned detection area range E ₁₂ of the potentiometer 58, where there was a which region detection value of the previous potentiometer 58 is determined. And if the detection value of the previous potentiometer 58 is a region E _13, the operating lever 17 is E from E _{13 12}
In step S44, the target operation position is predicted to be P ₉ (“down”).

In step S43, the previous potentiometer 5
If the detected value of 8 is an intermediate region E _11, the manual operation lever 1
7 returns from the specific area E ₁₃ located before and the detection area E
_In S45, the operation position of the operation lever 17 is returned to the original operation position P ₁₃ (“ ₁₂ ”) assuming that the operation lever 17 has been returned to the return detection region E ₁₂ again without being operated to the next specific area E ₉ as the target. Planting ”). Furthermore, if other than the detection value region E _11, E ₁₃ of the previous potentiometer 58 in S43, the operation direction is returned to the initial as unknown.

[0053] In S42, the process proceeds to S46 if the current value range of the specific region E ₁₃ of the potentiometer 58, the position of the operating lever 17 and the operating position P ₁₃ ( "planting"),
Further, in S42, the current value of the potentiometer 58 in the range if the operating direction of the intermediate region E ₁₁ is initially back as unknown.

[0054] In S38 described above, if the current value range of the specific region E ₉ potentiometer 58, the process proceeds to S47, where the operation of the operation position of the operation lever 17 position P ₉
("Lower").

The position detection of the operation lever 17 described above is based on the following technical idea.

That is, FIG. 10 shows an embodiment in which the operation direction of the operation lever 17 is determined.
As shown in S57, the current value of the potentiometer 58 is compared with the previous value, and the operation direction is determined based on the magnitude of the absolute value (see S52), and based on the sign of the difference between the current value and the previous value (S53). Operation lever 17)
When the operation speed is slow, there is a possibility that a change in the operation cannot be recognized.

Therefore, as shown in S60 to S64 in FIG. 11, the detection range of the potentiometer 58 is divided into several blocks, and to which block the current value of the potentiometer 58 belongs and to which block the previous time was. By detecting (see S61), the operation lever 17
Regardless of the operation speed of the operation, a change in the operation can be reliably recognized.

In the present embodiment described above,
The case where the planting unit 10 is moved up and down based on the operation of the manual operation lever 17 has been described. However, the planting unit 10 can be similarly controlled to be moved up and down by operating the hand operation lever 38, for example.

That is, in FIG. 1, a steering wheel 13 is provided in front of the driver's seat 9 and a hand control lever 38 is provided above the steering shaft 13a of the steering wheel 13. Reference numeral 38 is operable up and down along the steering shaft 13a, and is urged to automatically return to the reference position when the hand is released.

The hand operation lever 38 can control the raising and lowering of the planting section 10 only when the manual operation lever 17 is operated to the “planting” position. , A "down" position displaced downward from the reference position, and a "planting" position in which the hand-operated lever 38 is displaced downward again after the descent is started.

On the other hand, in order to control the hydraulic control valve 35 by the hand operation lever 38, the fixing of the tongue piece 69a of the lever member 69 to the one tongue piece 68a of the sleeve 68 in FIGS. The fixing between the other tongue piece 68b of the sleeve 68 and the flat plate cam 30 is released, the motor mounting plate 34 and the bracket 18 are fixed by the bolts 60 and nuts 61, and the motor gear 42 and the cam gear 32 are engaged with each other.

In the rear cover 26 below the seat 7, an operating mechanism 40 is arranged together with the connecting mechanism 50.
The hydraulic control valve 35 is operated by the operating mechanism 40.
Is operated. The operating mechanism 40 includes a motor mounting plate 34
, A motor gear 42 fixed to its output shaft via a reduction mechanism 20 meshing with the cam rotation motor 41, a cam gear 32 meshing with the motor gear 42, and a cam gear 32. And a flat cam 30 loosely fitted to the support shaft 31.

The support shaft 31 has a base end supported by the body frame 16 and a free end supported by a positioning cam 33. The positioning cam 33 has a corrugated portion 33a formed at one end edge. ing. The motor mounting plate 3
4 is attached to the body frame 16 by bolts 60 and nuts 61 via brackets 18.

A cam position potentiometer 43 is attached to the positioning cam 33 via a collar 62. The cam gear 32 and the flat plate cam 30 are connected by a connecting member 66, and an extension arm 66 a extended from the connecting member 66 is connected to the cam position potentiometer 43 via an operation arm 67.

As described above, when the hand operation lever 38 is operated, the cam rotation motor 41 is rotated via the control unit 39, the motor gear 42 and the cam gear 32 are rotated, and the flat cam 30 is rotated by the connecting member 66. Moved, and the pin 36a
The hydraulic control valve 35 is controlled via the valve operating plate 36 and the hydraulic cylinder device 19 controls the planting section 1.
0 is controlled to move up and down.

[0066]

As described above, according to the first aspect of the present invention, the target next operation position can be predicted before the operation lever is operated to the next operation position. Thus, processes such as line marker control and horizontal automatic control, which are controls corresponding to the lever operation position, can be started quickly.

According to the second aspect of the present invention, even if a return operation is performed for some reason while operating the operation lever toward the target operation position, the operation lever is returned to the original operation position. Since this can be predicted earlier in advance, the control corresponding to the next lever operation position can be quickly performed as described above.

According to the third aspect of the present invention, since the operation lever is positioned at each operation position by the detent mechanism, the operation lever can be quickly operated to the target position and the detent mechanism is provided. There is no possibility that the operation lever is easily moved by the moderation function.

[Brief description of the drawings]

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

FIG. 2 is a front view of a connection mechanism that connects an operation lever and a hydraulic control valve.

FIG. 3 is an external perspective view of the same.

FIG. 4 is a side view of FIG. 2;

FIG. 5 is a diagram illustrating a detection region of an operation position of an operation lever.

FIG. 6 is a diagram showing a control flowchart in the present embodiment.

FIG. 7 is a diagram illustrating a detection region of an operation position of an operation lever according to another embodiment.

FIG. 8 is a diagram illustrating a control flowchart according to another embodiment.

FIG. 9 is a diagram illustrating a control flowchart according to another embodiment.

FIG. 10 is a diagram illustrating a general control flowchart relating to detection of an operation direction of an operation lever.

FIG. 11 is a diagram illustrating a control flowchart according to the present embodiment for detecting the operation direction of the operation lever.

FIG. 12 is a side view showing the overall configuration of a hydraulic control mechanism in a conventional riding rice transplanter.

FIG. 13 is a plan view of a lever guide of the operation lever.

FIG. 14 is a diagram showing a conventional example relating to detection of an operation position of an operation lever.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Riding rice transplanter 17 Manual operation lever 21 Lever guide 30 Flat cam 31 Support shaft 32 Cam gear 33 Positioning cam 33a Wave part 35 Hydraulic control valve 38 Hand operation lever 39 Control part 40 Operating mechanism 50 Connection mechanism 52 Bolt 53 Nut 54 Connection member 56 lever member 58 potentiometer 68 sleeve 68a, 68b tongue 69 the lever member 69a tongues 70 roller P ₁ increases (operating position) P ₃ fixed (operating position) P ₅ down (the operating position) P ₇ planting (operating position) E ₁ , E ₃ , E ₅ specific area E ₂ , E ₄ , E ₇ intermediate area

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Chie Mizutani 667, Iya-cho, Higashi-Izumo-cho, Yatsuka-gun, Shimane 1 F-term in Mitsubishi Agricultural Machinery Co., Ltd. (Reference) 2B062 AA11 AB01 BA13 BA22 BA62 CA05 2B304 KA11 LA02 LA05 LB02 LB16 LC04 MB02 PA01 3J070 AA03 BA11 CC71 DA24

Claims (3)

[Claims] An operation lever movable along a guide, a detection sensor for detecting an operation position of the operation lever in an operation direction, and a detection value of the detection sensor separated along the operation direction of the operation lever. A specific area including a plurality of arranged operation positions,
And an intermediate area provided between the specific areas, and based on a detection value from the detection sensor, a specific area where the operation lever was located, and a next operation position targeted by the operation lever. By detecting that the operation lever moves from the specific area where the operation lever was located in the intermediate area between the specific area and the specific area, the operation direction of the operation lever is determined, and the operation direction corresponding to the next operation position is determined. And a control unit that starts control. 2. The method according to claim 1, wherein the intermediate area is divided into a plurality of sections, and a return detection area is provided adjacent to the specific area of the intermediate area. In a state in which the target has passed through the return detection area, when it is detected in the return detection area that the target is not operated to the next specific area again, the prediction of the next operation position of the operation lever is canceled. The lever position detecting device according to claim 1, wherein: 3. The lever position detecting device according to claim 1, wherein the operation lever is positioned and held at each of the operation positions by a detent mechanism.