JP2001086821A - Working vehicle-operating dashboard - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a working vehicle-operating dashboard capable of easily selecting operational states of plural working functions of working machinery to display the operational states. SOLUTION: The subject dashboard for controlling three working functions among the plural working functions of the working machinery 3 attached to a mobile working vehicle 1 is composed of a steering wheel 23 and an operating lever 36 positioned behind the wheel so that the operating lever 36 can be set from the neutral position to one of the three positions corresponding to the above three functions and freely changed into another position. The dashboard is so composed that, at any time when the operating lever 36 is set from the neutral position to a desired position, the operational states of two working functions other than the desired function are alternately displayed, and further that, at another time when the lever 36 is changed to be set to the next position, another pair of operational states of the working functions other than the next working function is displayed in the same way.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a construction in which power from a traveling machine is intermittently supplied to a seedling planting device via a planting clutch. The operation structure of a rice transplanter, which is provided so as to be switchable between an operation state in which a drawing marker that draws a traveling index of the vehicle is set to a posture protruding laterally outward and a storage state in which a retired posture is maintained toward the inside of the machine. .

[0002]

2. Description of the Related Art In the operation structure of a rice transplanter described above, conventionally, an operating tool for selectively setting left and right drawing markers to an active state based on forward and reverse operations from a neutral position is provided. It has been conceived that the planting clutch is always engaged in connection with the operation, regardless of whether the left or right drawing marker is selected by the tool.

[0003]

In the above-described conventional structure, the planting work is performed in a reciprocating running of a rice transplanter of this type, in which the work process of turning straight ahead, turning, changing direction, and going straight again is sequentially performed. Any of the drawing markers is set to the operating state, the planting clutch is set to the on state, and at the time of turning around the ridge, the seedling planting device rises, the planting clutch is turned off, and the drawing marker is also set. Since the left and right switching operations are performed, a structure in which these operations can be linked and operated by a single operation tool is used to eliminate the inconvenience of the steering operation in turning traveling on the bank. . However, in the conventional structure, when the planting clutch is engaged and operated, the left or right drawing marker is always set to the operating state. For example, the work by reciprocating traveling inside the field is completed. Finally, when planting seedlings on the headland near the ridge, since the ridges and the already planted seedlings are present on both sides of the machine, the drawing marker cannot be set to the active state, and planting work will not be performed. There was an inconvenience that could not be done. The present invention does not cause a decrease in steering operability during planting work by reciprocating travel,
The purpose is to eliminate the above-mentioned disadvantages.

[0004]

According to a feature of the present invention, in the operation structure of the rice transplanter described at the beginning, one of the left and right drawing markers is set based on a forward / reverse switching operation from a neutral position. A first operation tool for selectively switching from the retracted state to the operation state and for engaging and operating the planting clutch in conjunction with each of the forward / reverse switching operation, based on an operation in a predetermined direction from the neutral position. And a second operating tool for engaging and operating the planting clutch.

[0005]

When performing the seedling planting operation by reciprocating traveling, the first operating tool is operated each time the turning traveling on the ridge ends, thereby switching the drawing marker set to the operating state from left to right. The planting clutch is set to the engaged state in conjunction with the operation, so that two types of switching operations can be performed simultaneously with one operating tool, and the steering operation can be performed efficiently. Then, when performing the seedling planting operation of the headland, by operating the second operating tool, the planting clutch can be independently engaged regardless of the selection operation of the drawing marker, and the drawing marker The working state can be prevented.

[0006]

Therefore, it is necessary to perform the operation of the body such as the shifting operation and the steering operation of the traveling body almost at the same time, so that various operations are complicated. While you can do it,
When it is necessary to perform planting work in a state in which the drawing marker cannot be set to the operating state (projected state), it is possible to reliably enter and operate only the planting clutch with a different operating tool, and the drawing marker contacts the ridge. It is possible to prevent harmful effects such as damage or pushing down the already planted seedlings.
In a special work situation in which a drawing marker cannot be used in a field, in general, there is often no need to operate the airframe, and therefore, even if the user switches to another operation tool, the operation is less troublesome.

[0007]

Embodiments will be described below with reference to the drawings. FIG.
5 shows a riding type rice transplanter which is an example of a ground work machine. In this rice transplanter, a seedling planting device 3 [an example of a ground working device] is driven by a lift cylinder 4 [an example of a driving mechanism] at a rear portion of the riding type traveling body 1 via a parallel quadruple link mechanism 2 so as to be able to move up and down and to be electrically driven. The rolling motor 5 is connected so as to be capable of driving rolling freely around the longitudinal axis.

In the traveling machine 1, the power of an engine 6 mounted on the front of the machine is transmitted to front and rear wheels 10 and 11 via a belt type continuously variable transmission 7 and a gear shift type main transmission 9 in a transmission case 8. The planting device 3 is constructed so as to drive and drive the machine body, and the power after shifting can be freely intermittently operated via the planting clutch 12 [an example of a work clutch].
The transmission system is configured to be transmitted to The continuously variable transmission 7 is a split pulley type continuously variable transmission, and is driven by an electric cylinder 15 so that the interval between the split pulleys is set to a speed set by a potentiometer type speed setting device 14 provided on the body operation panel 13. It is configured to operate.
The main transmission 9 is configured to be freely switchable between a first forward speed F1 for planting work, a second forward speed F2 for road running, a neutral position N, and a reverse position R by a main shift lever 16. is there.

The seedling planting device 3 takes out seedlings one by one from the lower end of the seedling rest 18 and the lower end of the seedling rest 18 which reciprocate in a reciprocating lateral movement with a constant stroke with respect to the planting transmission case 17 also serving as a frame. A planting mechanism 19 for planting, a plurality of ground floats 20 and the like which are supported so as to be able to swing up and down around a rear fulcrum are provided, and a drawing for drawing a running index line in the next work process on a field scene is provided on both left and right sides. The marker 21 is provided so as to be able to move back and forth. Each of the drawing markers 21 and 21 is
Each is configured to be biased by switching to the protruding posture and to be forcibly stored via a wire as the seedling planting device 3 is raised, and to lock and hold the left and right drawing markers 21 and 21 in the stored state. The lock mechanisms 22 and 22 are selectively unlocked, and when the seedling planting apparatus 3 is lowered, the drawing marker on the selected side is set to the protruding action posture. As shown in FIG. 7, the release operation of each of the lock mechanisms 22, 22 is performed by turning the steering handle 2 as shown in FIG.
3 is selectively operated by switching the first operating tool 24 provided on the lower right side from the neutral position in which the return bias is applied in the forward and backward and forward and reverse directions. The first operating tool 24 is linked so that when the forward / reverse switching operation is performed from the neutral position, the on / off clutch switch 25 of the planting clutch 12 is turned on in conjunction therewith. As shown in FIG. 1, the planting clutch 12 has a gear reduction type operation member 28 which is driven by a forward / reverse type electric clutch motor 27 driven through a relay circuit 26 which is switched by a clutch ON signal and a clutch OFF signal. The on / off operation is performed through a clutch, and the determination as to whether the clutch is engaged or disengaged is made by detecting one of a clutch-off switch 29 and a clutch-on switch 30 that are in contact with the operating member 28. I have.
The link mechanism for the interlocking operation includes a compression spring S which is interlocked and linked by a compression operation when operating the clutch disengagement side.
By interposing P, the clutch disengagement operation can be performed quickly while securing the operation flexibility.

[0010] The seedling planting device 3 is provided with an operation lever 32 provided on the side of the driver's seat 31 so as to be manually swingable back and forth.
Is configured to be moved up and down by the switching operation. As shown in FIG. 6, the operation lever 32 has a “planting position” P (an example of a working position), a “down position” D, a “neutral position” N, a “up position” U, and an “automatic position” AT. Each of them is configured to be switchable, and the switching operation is
A control device 3 having a microcomputer by detecting the amount of forward / backward swing by a potentiometer type lever sensor 33
4 [an example of the control means] is performed by determining the level of the detection value of the lever sensor 33. That is, the control device 34
Is based on that level,
The planting clutch 12 is operated to engage the clutch while the seedling planting device 3 is in contact with the ground and lowered. If the planting clutch 12 is in the “down position” D, the seedling planting device 3 is lowered while contacting the planting clutch.
If the “neutral position” N, the position is held as it is, and if the “elevated position” U, the seedling planting device 3 is forcibly raised to the set height. Then, when the operation is switched to the "automatic position" AT, as described later, the elevating operation by the elevating operation switch 35 can be performed, and the control for forcibly raising the seedling planting device 3 when the body moves backward is performed. As shown in FIG. 7, a second operating tool 36 is provided on the lower left side of the steering handle 23 in the body operating section, and the second operating tool 3 is provided.
6 is a state in which the raising and lowering operation switch 35 is turned on when the rocking operation is performed upward from the neutral position in which the return is biased, and the seedling planting device 3 is brought into contact with the ground every time the switch is turned on. The state in which the planting device 3 is raised can alternately appear. When the second operating tool 36 is pivoted downward from the neutral position, the clutch switch 25 for switching the planting clutch 12 to the engaged state is operated. A reverse detection switch 37 for detecting that the main transmission lever 16 has been detected at the reverse position R.
When the reverse detection switch 37 is in the detection operation state, the control device 34 controls the seedling planting device 3 to be forcibly raised to the maximum raising position. The detection that the seedling planting device 3 has been raised to the maximum raised position is configured to be detected by an intermediate portion of the link mechanism 2 acting on a link switch 38 provided on the rear side of the driver's seat 31. is there. The raising and lowering control of the seedling planting apparatus 3 by the raising and lowering operation switch 35 and the forcible raising control at the time of the aircraft reversing are performed only when the operation lever 32 is operated to the "automatic position" AT. I have.

The operation lever 32 is operated to one of the "planting position" P, the "down position" D and the "automatic position" AT, and the main speed change lever 16 is moved to the first forward position. In a state where the speed is operated at the speed F1 or the forward second speed F2, the automatic rolling control is executed so that the left and right inclination posture of the seedling planting device 3 is maintained at the set posture. More specifically, as shown in FIG. 3, the main transmission switch 39 for detecting whether the main transmission lever 16 is operated to the first forward speed F1 or the second forward speed F2, and the absolute position of the seedling planting device 3 A weight type inclination sensor 40 for detecting an inclination angle from a horizontal posture, and a potentiometer type inclination angle setting device 41 for artificially setting a target inclination posture, and a control device based on these outputs and the output of a lever sensor 33 are provided. 3
4 performs control as shown in the control flowchart of FIG. The main shift switch 39 detects that the main shift lever 16 is operated to the first forward speed F1 or the second forward speed F2, and the output of the lever sensor 33 changes the operating position of the operating lever 32 to the “planting position”. P, when it is detected that any of the “down position” D and the “automatic position” AT has been operated, the detection value XR of the inclination sensor 40 differs from the target value Ra by the inclination angle setting device 41, The detected value XR of the inclination sensor 40 is the target value Ra by the inclination angle setting device 41.
If it is smaller, the output for the lower right is output to the relay circuit 42 until these values substantially match, and the rolling motor 5 is rotated in the lower right direction. Tilt sensor 4
If the detected value XR of 0 is larger than the target value Ra by the inclination angle setting device 41, an output for lowering to the left is output to the relay circuit 42, and the rolling motor 5 is rotationally driven to lower left. The circuit configuration is such that when the rolling motor 5 is driven to the mechanical operation limit and detected by the left and right limit switches 43 and 44, the relay circuit 42 is directly turned off to stop the driving of the rolling motor 5. I have. Further, even when an abnormality occurs in the automatic control system as described above, the relay circuit 42 is directly driven by the manual rolling switch 45 which is three-position switching type and is biased to return to the center, thereby manually performing the rolling drive. It is configured to be able to. In the manual rolling operation by the manual switch 45, the control signal from the controller 34 is configured to be kept in the off state.

During the planting operation, automatic raising and lowering control is performed so that the ground height of the seedling planting apparatus 3 is maintained at a set value. As shown in FIG. 2, a potentiometer type float sensor 46 for detecting the vertical swing amount based on the ground pressure fluctuation of the ground float 20 located at the left and right center is provided.
The detection value of the float sensor 46 is transmitted to the control panel 13
The controller 34 automatically controls the electromagnetic control valve 48 for the lift cylinder 4 so as to fall within the setting range of the potentiometer type sensitivity setting device 47 provided in the above, so that the ground height of the seedling planting device 3 is set. Value will be maintained. That is, as shown in FIG. 5, the control device 34 holds the state if the detection value XS of the float sensor 46 is within the dead zone of the target value Sa, and if the detection value XS is larger than the target value Sa, the electromagnetic control is performed. A drive signal is output to the ascending electromagnetic solenoid UPSol of the valve 48, and if the detected value XS is smaller than the target value Sa, the descending electromagnetic solenoid DWS
ol to output a drive signal. The automatic lifting control is configured to be executed only when the operation lever 32 is operated to any one of the “planting position” P, the “down position” D, and the “automatic position” AT. I have. The sensitivity setting device 47 changes the target reference posture of the ground float 20, and changes the sensing load of the ground float 20 according to the hardness of the mud. The control target value by the sensitivity setting device 47 can be corrected by a three-position switching type correction switch 51. As shown in FIG. 8, by changing the correction switch 51, the change characteristic of the control target value with respect to the set value by the sensitivity setting unit 47 is changed by the parallel movement to the insensitive side (the reference attitude of the ground float is in the forward rising direction) or the sensitive side (the front side). Downward direction]. Further, if the vehicle traveling speed becomes high, the contact float 20 may be slightly lifted, and the seedling planting device 3 may rise to become shallow. Therefore, the change characteristic of the control target value in the elevating control is the vehicle speed. It is configured to be changed according to. That is, a speed sensor 52 for detecting the speed of the engine 6 and a potentiometer-type shift position sensor 53 for determining the shift position of the continuously variable transmission 7 are provided. If the speed is faster (for example, the vehicle speed is 0.8 m / sec or more), the change characteristic of the control target value is changed to the insensitive side, and the change amount becomes larger as the vehicle speed increases. Further, since a hydraulic pump (not shown) for the lift cylinder 4 is driven by the engine 6, the flow rate of hydraulic oil for the lift cylinder 4 changes due to a change in the engine speed. Each electromagnetic solenoid UPS of the electromagnetic control valve 48 according to the detection result of the number
ol, the duty ratio of the pulse current supplied to the DWSol is appropriately changed, and the control is performed such that the flow rate of the working oil is always kept constant.

[0013] As shown in FIG.
1. Manual rolling switch 45 and correction switch 51
Are disposed on a rear wheel fender 54 located on the side of the driver's seat 31, and these are openable and closable lids 55.
It is configured to cover with.

Next, the control operation of the control device 34 relating to the elevating operation of the seedling planting device 3 will be described in detail with reference to the control flowcharts shown in FIGS. When the main switch is turned on and the control is started, the ascending electromagnetic solenoid UPSo of the electromagnetic control valve 48 for the lift cylinder 4 is moved.
1 and the outputs of the lowering electromagnetic solenoid DWSol are turned off, and the operation flag f0 for the lifting / lowering operation switch 35, the operation flag f1 for the clutch switch,
Initialize each of the operation flag f2 for automatic lifting control and the operation flag f3 for reverse lifting operation to “0” [Step 1,
2]. When the operation lever 32 is operated to a position other than the "automatic position" AT, the operation flags f0 to f3 are initialized, and when the operation lever 32 is at the "neutral position" N, the clutch engagement signal STR for the clutch motor 27 is turned off. If the clutch off switch 29 is on, the clutch off signal ST
P is turned off, and if the clutch off switch 29 is off, a clutch disengagement signal STP is output and the planting clutch 1
2 is maintained in the cut state [Steps 3-9]. And
If the operation lever 32 is at a position other than the "automatic position" AT or the "neutral position" N when the main switch is turned on, once the operation lever 32 is switched to the "neutral position" N, the next operation is performed. Proceed to step [Step 1
0].

When the operation lever 32 is operated to the "up position" U, the clutch engagement signal STR is turned off, the operation flag f2 for automatic up / down control is set to "0", and then the clutch off switch 29 is turned on. If there is, the clutch disengagement signal STP is turned off, and if the link switch 38 is on (the seedling planting device 3 is in the up state), the ascending electromagnetic solenoid UPSol is turned off. If the link switch 38 is in the off state, it goes up. The operator turns on the electromagnetic solenoid UPSol for raising the seedling planting device 3 [steps 11 to 1].
7]. If the clutch-off switch 29 is not on, the clutch disengagement signal STP is turned on and the planting clutch 12 is disengaged by the clutch motor 27, and the ascending and descending solenoids UPSol and DWSol are turned off [steps 18, 19]. When the operation lever 32 is operated to the "down position" D, the output of the clutch engagement signal STR is stopped, and then the planting clutch 12 is turned on in the same manner as the control described above.
The seedling planting apparatus 3 is lowered [Steps 24 to 26] while maintaining the cutting state [Steps 20 to 23]. When it is determined from the detection value of the float sensor 46 that the seedling planting device 3 has touched the ground, the automatic elevation control mode is executed [step 27]. At this time, if the link switch 38 is turned on, the ascending solenoid UPSol is turned off, and the automatic up / down control operation flag f2 is set to "1" (steps 28 to 30). When the operating lever 32 is operated to the "planting position" AT, the clutch-on signal STR is turned off, and then the clutch-on signal STR is output until the clutch-on switch 30 is turned on to operate the clutch motor 27 to perform the planting. The attached clutch 12 is brought into the engaged state [steps 31 to 34]. Thereafter, automatic elevating control is performed. The operation flags f0, f1 and f3 other than the operation flag f2 for automatic elevation control are maintained at "0" (step 35).

Next, the operation when the operation lever 32 is operated to the "automatic position" AT will be described. Operation lever 3
When the up / down operation switch 35 is operated after the 2 is operated to the "automatic position" AT, the switch operation flag f0 is set to "1", and when the link switch 38 is in the ON state (up state), the automatic up / down operation is performed. Set the control operation flag f2 to “0”
, And the lowering solenoid DWSol is turned on to lower the seedling planting device 3 [Steps 36, 37, 39 to
43]. When the seedling planting apparatus 3 comes down on the ground, the switch operation flag f0 is set to "0", the operation flag f2 for automatic elevating control is set to "1", and then the mode shifts to the automatic elevating control mode [Steps 44 to 44] 48]. If the link switch 38 is off when the lifting operation switch is operated, the planting clutch 12 is disengaged to raise the link switch 38 until the link switch 38 is turned on (steps 49 to 5).
4]. When the link switch 38 is turned on, the switch operation flag f0 is set to "0" (steps 55 and 55).
6]. When the up / down operation switch 35 is operated again during the up / down operation, the operation direction is reversed [steps 56 to 60]. Note that, when the raising / lowering operation switch 35 is operated in the initial state, the planting clutch 12
If is not the cutting state, it returns to the initial state [Step 3
7, 38]. Then, when the clutch switch 25 is turned on by the operating tools 24 and 36 of the control unit after the seedling planting device 3 is lowered, the clutch switch operation flag f1 is set to "1" and planting is performed. When the clutch 12 is engaged (steps 61 to 64), the alarm buzzer 56 sounds until the clutch-on switch 30 is turned on. When the clutch-on switch 30 is turned on, the clutch switch operation flag f1 is set to "0" to issue an alarm. It stops (steps 65 to 69). Thereafter, the mode shifts to the automatic elevating control mode.

After the operation lever 32 is operated to the "automatic" position, the operation of the main transmission lever 16 to the reverse transmission position is detected by the reverse detection switch 37, and if the link switch 38 is not in the ON state, After setting the reverse ascending operation flag f3 to "1" [Steps 70 to 7]
4] Then, the process proceeds to a step 49, wherein the seedling planting apparatus 3 is operated until the planting clutch 12 is turned off and the link switch 38 is turned on.
Is forced to rise. When the link switch 38 is turned on, the reverse ascending operation flag f3 is set to "0" (step 56). Further, there is no operation of the lifting / lowering operation switch 35 or the detection operation of the reverse detection switch 37, and the reverse lifting operation flag f3
Is “1”, when the seedling planting device 3 is in the ascending position and the operation lever 32 is shifted from another position, or when the automatic elevating control mode is not set, the seedling planting device 3 is held at the ascending / descending position [ Steps 75 to 79]; otherwise, the mode is shifted to the automatic elevating control mode [Steps 80 and 46].

In the claims, reference numerals are provided to facilitate comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is a control block diagram for a lifting operation.

FIG. 2 is an elevation control block diagram.

FIG. 3 is a block diagram of a rolling control.

FIG. 4 is a flowchart of a rolling control.

FIG. 5 is a lifting control flowchart.

FIG. 6 is an operation explanatory view of an operation lever.

FIG. 7 is a plan view of an arrangement portion of the operation tool.

FIG. 8 is a diagram showing the sensitivity characteristics

FIG. 9 is a plan view of an operation unit.

FIG. 10 is an elevating control flowchart.

FIG. 11 is an elevating control flowchart.

FIG. 12 is an elevating control flowchart.

FIG. 13 is a lifting control flowchart.

FIG. 14 is an elevating control flowchart.

FIG. 15 is an overall side view of the rice transplanter.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 traveling machine 3 seedling planting device 12 planting clutch 21 wire drawing marker 24 first operating tool 36 second operating tool

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[Procedure amendment]

[Submission date] August 31, 2000 (2000.8.3)
1)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Title of the Invention] Operation structure of work vehicle

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work vehicle, and more particularly, to a structure of operation in a work function of a work device provided in a traveling machine body.

[0002]

2. Description of the Related Art In a work vehicle, in a work function of a work device provided in a traveling machine body, an operation lever for displaying an operation state of the work function is moved to a lateral outer side of the body control section (for example, a driving seat of a body control section of the body control section). There are many that are arranged on the outside.
Thus, the operating state of the work function can be brought out by operating the operation lever by the operator.

[0003]

In general, during operation of a work vehicle, an operator of a body control unit often has a steering wheel located in front of the operator's hand, so that the operating state of a work function is displayed. In such a case, according to the structure described in the related art, the operator needs to release the hand from the front steering handle, move the hand backward to the lateral outer side of the aircraft control unit, and operate the operation lever. . In a work vehicle, for example, when the traveling machine reaches the end of the work place after one work process is completed, the work device is stopped by the work clutch, the work apparatus is driven up, and the traveling machine is moved to the work place. After turning at the end of the work area,
In some cases, the work device is driven downward, the work clutch is activated by the work clutch, and an operation such as entering the next work process is performed.

Thus, as described in the related art, when the operating lever is disposed on the laterally outer side of the aircraft operating section,
For example, when the traveling aircraft reaches the end of the work place after one work stroke, the driver releases his / her hand from the front steering wheel and moves his / her hand to the lateral outside of the aircraft operating unit. It is necessary to operate the operating lever to operate the operating device to stop the operating device by the operating clutch, drive the operating device upward, move the hand again to the front steering handle, and perform the turning operation of the traveling body by the steering handle. Next, when the turning at the end of the work area is completed, the operator releases his / her hand from the front steering handle, moves his / her hand to the lateral outer side of the aircraft control unit, and operates the operation lever to operate the operation device. , The work device is operated by the work clutch, the hand is moved again to the front steering handle, and the steering handle needs to be held.

[0005] In this way, in order to make the operating device operate or stop, the operator moves his / her hand from the front (the steering handle) to the rear (the operation lever on the lateral outer side of the body operation unit).
, And from the rear to the front again, which is a troublesome state for the operator.
Further, if the hand needs to be moved as described above, for example, after the working device is stopped by the work clutch and the working device is driven up, the turning operation of the traveling body by the steering handle may be delayed, and When the turning radius of the traveling machine becomes large, it may be difficult to bring the traveling machine to a position adjacent to the previous work when entering the next work. SUMMARY OF THE INVENTION It is an object of the present invention to provide a configuration in which a work function of a work device can be easily displayed in a work vehicle operation structure.

[0006]

A feature of the present invention resides in that the operation structure of the work vehicle is configured as follows. [1] An operation tool that is artificially operated is provided below the steering handle of the body operation unit, the operation tool is configured to be operable in one or the other from a neutral position, and work provided on the traveling body. Of the plurality of work functions of the device, the operation state of two of the three work functions alternately appears each time the operation tool is operated from the neutral position to one of the three work functions. When the operation of the operating tool is performed from the neutral position to the other, the operating states of the remaining working functions of the three working functions appear.

[2] An operation tool that is manually operated is provided below the steering handle of the body operation section, and the operation tool is configured to be operable to one side and the other side from the neutral position, and provided to the traveling body. In each of the two working functions of the working device, the normal operation state and the reverse operation state of one of the operation functions alternately appear each time the operation tool is operated from the neutral position to one of the operation functions. To be issued,
When the operation of the operating tool is performed from the neutral position to the other, the operation state of the other work function is displayed.

[3] An operation tool that is manually operated is provided below the steering handle of the body operation section, and the operation tool is configured to be operable to one side and the other side from the neutral position, and is provided for the traveling body. Among the plurality of working functions of the working apparatus, three working functions of operating the working apparatus to drive up the working apparatus, operating the working apparatus to move down, and operating the working clutch for operating and stopping the working apparatus. In the function, each time an operation is performed from the neutral position of the operation tool to one of the three operation functions, an operation state of two of the three operation functions is alternately displayed, and the operation tool is in a neutral position. When the operation is performed from to the other, the operation states of the remaining work functions of the three work functions appear.

[4] In any one of the constitutions [1], [2] and [3], the operation of the operating tool from the neutral position to one and the other is performed in a direction along the perspective direction to the steering handle. It has been set.

[0010]

[I] According to the features of the first, second, and third aspects, the operating tool is disposed below the steering handle of the body operating section, and each time the operating tool is operated from the neutral position to one side,
The operating states of two of the three working functions alternately appear (the normal operating state and the reverse operating state of one of the two working functions alternately appear). When the operating tool is operated from the neutral position to the other, the operating states of the remaining working functions of the three working functions appear (the operating states of the other working function appear in the two working functions). In this case, according to the features of the first, second, and third aspects, the operator of the aircraft operating section may extend his / her finger slightly while holding the steering handle by hand, for example, or may lift his / her hand slightly away from the steering handle. By extending the hand to the side, the operating tool can be operated from the neutral position to one and the other.

[II] According to the features of the first, second and third aspects, each time the operating tool is operated from the neutral position to one side as described in [I], two of the three working functions are performed. Since the operation states of the functions appear alternately (the normal operation state and the reverse operation state of one of the operation functions alternately appear in the two operation functions), two operations are alternately repeated in the operation device. (Such as alternately repeating one operation in the operation device in the forward and reverse directions) can be easily performed.

According to the features of the first, second, and third aspects, by operating the operating tool from the neutral position to the other as described in [I] above, the operation of the remaining one of the three working functions is performed. Since the states can be made to appear (the operating states of the other working functions in the two working functions appear), the operating states of a plurality of working functions can be made to appear with one operating tool.

[III] In the work vehicle, for example, when one work process is completed and the traveling machine reaches the end of the work place, the work device is stopped by the work clutch, and the work device is raised and driven. The traveling body is turned at the end of the work place, and when the turn at the end of the work place is completed, the work device is driven down, the work device is activated by the work clutch, and the next work process is started. Operations may be performed.

According to a third aspect of the present invention, a working function for driving the working device upward, a working function for driving the working device downward,
In the three work functions of operating the work clutch for operating and stopping the work device, each time one of the operation tools is operated from the neutral position, two of the three work functions are performed. Are alternately displayed, and when an operation is performed from the neutral position of the operating tool to the other, the operating states of the remaining work functions of the three work functions appear. Thereby, according to the feature of claim 3,
For example, by operating the operating tool from the neutral position to one and the other from the neutral position until the traveling machine reaches the end of the work site after one work process is completed and before the next work process is started. A work function for driving the device up, a work function for driving the work device down, and a work function for operating the work clutch for operating and stopping the work device can be easily exhibited.

According to a third aspect of the present invention, if the raising and lowering driving of the working device and the operation and stop of the working device can be easily performed, the turning operation of the traveling body by the steering handle at the end of the working place is delayed. Therefore, when turning at the end of the work place is completed and the next work process is started, the user can hold the steering handle by hand without delay and start the next work process.

[IV] According to the feature of claim 4, as in any one of claims 1 to 3, the above [I]
To [III], in addition to the following “action”. According to the feature of claim 4, when the operating tool is arranged below the steering handle of the body operating section, one and the other operations from the neutral position of the operating tool are set in a direction along the perspective direction to the steering handle. ing. Thereby, according to the feature of claim 4, since the operation direction of the steering handle and the operation direction of the operation tool intersect and are different from each other, for example, when the driver operates the steering handle, Even if the hand accidentally touches the operating tool, it is unlikely that the operating tool will be operated one and the other from the neutral position.

As described in [I] above, for example, a finger may be extended slightly downward while holding the steering handle by hand, or a hand may be extended slightly downward by releasing the steering handle. When the operating tool is operated from the neutral position to one side and the other, according to the feature of claim 4, the direction along the distance to the steering handle for the extended finger or hand is a natural and easy direction. Operation from one position to one and the other can be performed easily and quickly.

[0018]

According to the first, second and third aspects of the present invention, the operating tool is arranged below the steering handle of the body operating section in the operation structure of the work vehicle, so that the operator can manually operate the steering handle. The operating tool can be easily operated from the neutral position to one or the other by extending the finger or hand slightly downward from the holding state, and the operating state of two of the three working functions Alternately appearing (in the two working functions, the normal operating state and the reverse operating state of one working function alternately appear), and the operating states of the remaining working functions of the three working functions appearing (2). The operation state of the other work function can be made to appear in one work function), so that the operability of the work vehicle can be improved.

According to the features of the first, second and third aspects, every time the operating tool is operated from the neutral position to one side, the operation states of two of the three working functions alternately appear (two working functions). In the function, the normal operation state and the reverse operation state of one of the work functions appear alternately), so that two works are alternately repeated in the work device (in the work device, the normal operation and the reverse of one work are alternately performed). This can be easily performed, and the workability of the work vehicle can be improved. According to the features of claims 1, 2 and 3, by operating the operating tool from the neutral position to the other, the operating states of the remaining working functions of the three working functions appear (the other working functions of the two working functions are displayed). The operating state of the work function can be displayed), so that the operating state of a plurality of work functions can be displayed by one operating tool, and the operability of the work vehicle can be improved. Was.

According to the feature of the third aspect, for example, from the time when the traveling machine body reaches the end of the work place after one work stroke is completed and before the start of the next work stroke, the lifting and lowering of the working device is performed. Since the lowering drive and the operation and stop of the working device can be easily performed, the turning operation of the traveling body by the steering handle at the end of the work place can be performed without delay, and the turning at the end of the work place can be performed. It is possible to hold the steering handle by hand without delay when finishing and entering the next work process, and it is possible to enter the next work process, and good operability in terms of turning operation of the traveling machine with the steering handle It became something.

According to the feature of claim 4, the "effect of the invention" of the claims 1 to 3 is provided similarly to the case of any one of the claims 1 to 3, and the "effect of the invention" is included in the "effect of the invention". In addition, it has the following "effects of the invention". According to a fourth aspect of the present invention, when the operating tool is disposed below the steering handle of the aircraft operating section, one and the other operations from the neutral position of the operating tool are set in a direction along the perspective direction to the steering handle. Therefore, for example, even if the operator accidentally touches the operating tool while operating the steering handle, it is difficult for the operating tool to be operated from the neutral position to one or the other, so that the operating tool is not operated. It was possible to prevent a decrease in work efficiency due to erroneous operation of one or the other from the neutral position. According to the feature of claim 4, when the operator extends a finger or a hand slightly downward from a state in which the driver holds the steering handle, for example,
Since the operating tools can be operated easily and quickly, the operability of the work vehicle has been improved.

[0022]

Embodiments will be described below with reference to the drawings. FIG.
5 shows a riding type rice transplanter which is an example of a work vehicle.
In the riding type rice transplanter, the seedling planting device 3 can be driven up and down by a lift cylinder 4 via a link mechanism 2 at the rear part of the riding type traveling machine body 1, and the electric rolling motor 5 rolls around the longitudinal axis. It is configured so as to be drivably connected.

As shown in FIG. 15, the power of the engine 6 mounted on the front of the traveling body 1 is transmitted via the belt type continuously variable transmission 7 and the gear shift type main transmission 9 of the transmission case 8 to the front. Power transmitted to the wheels 10 and the rear wheels 11 is transmitted to the seedling planting device 3 via the planting clutch 12 (see FIG. 1). The belt-type continuously variable transmission 7 is configured as a split pulley-type continuously variable transmission, and has a potentiometer-type speed setting device (not shown) provided on the aircraft control panel 13 so as to have a set speed. The interval between the split pulleys is changed by the electric cylinder 15. The main transmission 9 is configured to be operable by a main transmission lever 16 at a forward first speed position F1 for planting travel, a forward second speed position F2 for road travel, a neutral position, and a reverse position R.

As shown in FIG. 15, the seedling transplanting device 3 includes a seedling rest 18, which reciprocally moves in a fixed stroke with respect to a planting transmission case 17 also serving as a frame, and removes seedlings from the lower end of the seedling rest 18. Planting mechanism 19 to take out and plant each plant
It is provided with a plurality of grounding floats 20 and the like supported so as to be able to swing up and down around a rear fulcrum. On the right and left sides of the seedling planting device 3, a line drawing marker 21 for drawing a running index line for the next planting process on a field is provided so as to be able to move out and back. The right and left drawing markers 21 are urged to the protruding posture, and are forcibly stored through wires (not shown) as the seedling planting apparatus 3 is driven to ascend. By selectively releasing the right and left lock mechanisms 22 (see FIG. 1) that hold the left drawing marker 21 in the stored posture, the right and left lock mechanisms 22 selected when the seedling planting device 3 is driven downward are driven. Alternatively, the left drawing marker 21 is operated to the protruding posture.

As shown in FIGS. 7 and 15, the release operation of the right and left lock mechanisms 22 is performed by turning the steering handle 2.
3 is selectively operated by operating the first operating tool 24 provided on the lower right side of the third operating device from the neutral position in which the return operation is biased, in the front-rear direction.
Is operated from the neutral position in the front-rear direction.
The on-operation clutch switch 25 (see FIG. 1) is operated.

As shown in FIG. 1, the planting clutch 12 is driven by a forward / reverse type electric clutch motor 27 which is driven through a relay circuit 26 operated by a clutch engagement signal STR and a clutch release signal STP. Entry and exit operations are performed via a deceleration type operation member 28. Whether the planting clutch 12 is in the engaged state or the disengaged state is detected by a clutch-off switch 29 and a clutch-on switch 30 that contact the operating member 28. The link mechanism for the interlocking operation between the planting clutch 12 and the operating member 28 includes:
A compression spring SP that is compressed when the planting clutch 12 is turned off is provided, so that the planting clutch 12 can be quickly turned off while securing flexibility.

As shown in FIGS.
The seedling planting device 3 is driven up and down by an operation lever 32 provided on the lateral outer side of 1 and capable of manually swinging back and forth. The operation lever 32 has a planting position P, a descending position D,
The operation position of the operation lever 32 is detected by a potentiometer type lever sensor 33, and the control device 34 having a microcomputer detects the lever sensor 33. A value level determination is made.

If the operating lever 32 is operated to the planting position P based on the level determination of the detection value of the lever sensor 33, the planting clutch 12 is driven in a state in which the planting planting device 3 is driven down until it is grounded. When the entering operation is performed and the operation lever 32 is operated to the lowering position D, the seedling planting apparatus 3 is driven to lower while the planting clutch 12 is disengaged. When the operating lever 32 is operated to the neutral position N, the seedling planting device 3 is held at that position, and when the operating lever 32 is operated to the ascending position U, the seedling planting device 3 is driven up. . When the operation lever 32 is operated to the automatic position AT, a raising operation and a lowering operation are performed by a lifting operation switch 35 (refer to FIG. 1) described later, and the seedling planting device 3 is forcibly moved when the traveling body 1 moves backward. Driven up.

As shown in FIGS. 1, 7, and 15, a second operating tool 36 is provided on the lower left side of the steering handle 23 in the body operating section, and the second operating tool 36 is returned upward from a neutral position urged. When operated, the lifting operation switch 35 is turned on and activated. Thus, every time the raising / lowering operation switch 35 is turned on, the seedling planting device 3 is moved down to the ground contact position, and the seedling planting device 3 is moved to the maximum ascending position with the disengagement operation of the planting clutch 12. The ascending operation for ascending drive appears alternately. When the second operating tool 36 is operated downward from the neutral position, the clutch switch 25 for engaging and operating the planting clutch 12 is operated.

As shown in FIG. 1, a reverse detection switch 37 for detecting that the main shift lever 16 has been operated to the reverse position R is provided.
The control device 34 forcibly drives the seedling planting device 3 to the maximum ascending position. The detection that the seedling planting device 3 has risen to the maximum ascending position is performed when a link switch 38 disposed on the rear side of the driver's seat 31 contacts an intermediate portion of the link mechanism 2. The ascending operation and the descending operation by the elevating operation switch 35 as described above, and the forcible ascending drive of the seedling planting device 3 when the traveling machine 1 is moving backward are performed only when the operation lever 32 is operated to the automatic position AT. Done.

When the operating lever 32 is in the planting position P and the descending position D
And the automatic transmission AT is operated to operate the main shift lever 1
In the state in which the first gear 6 is operated at the first forward speed position F1 or the second forward speed position F2, the rolling control is performed so that the left-right inclined posture of the seedling planting apparatus 3 is maintained at the set posture. As shown in FIGS. 3 and 9, the main transmission switch 39 for detecting whether the main transmission lever 16 is operated to the forward first speed position F1 or the forward second speed position F2, the absolute horizontal posture of the seedling planting device 3 A weight type inclination sensor 40 for detecting the inclination angle from the vehicle, and a potentiometer type inclination angle setting device 41 capable of artificially setting a target inclination posture are provided. The main speed change switch 39, the inclination sensor 40, the inclination angle Setting device 4
The rolling control shown in FIG. 4 is performed by the control device 34 based on 1 and the lever sensor 33.

The main transmission lever 39 is operated by the main transmission switch 39.
6 is operated to the first forward speed position F1 or the second forward speed position F2, and the lever sensor 33 moves the operating lever 32 to the planting position P, the descending position D, and the automatic position AT.
If it is detected that is operated to any of the
If the detection value XR of the inclination sensor 40 is different from the target value Ra of the inclination angle setting device 41, and the detection value XR of the inclination sensor 40 is smaller than the target value Ra of the inclination angle setting device 41, the detection value XR of the inclination sensor 40 Is output to the relay circuit 42 (see FIG. 1) until the inclination angle substantially matches the target value Ra of the inclination angle setting device 41, and the rolling motor 5 operates in the downward right direction. Detection value X of tilt sensor 40
If R is larger than the target value Ra of the inclination angle setting device 41,
The output for lowering left is output to the relay circuit 42, and the rolling motor 5 operates in the lower left direction.

As shown in FIG. 3, when the right and left limit switches 43 and 44 detect that the rolling motor 5 has operated to the mechanical operation limit, the relay circuit 4 is activated.
2 is directly turned, and the rolling motor 5 stops. When an abnormality occurs in the rolling control as described above, the relay circuit 42 is directly operated by a manual rolling switch 45 (see FIGS. 3 and 9) which is biased to return to the center by a three-position switching type. Rolling motor 5 manually
Can be activated. When the rolling motor 5 is operated by the rolling switch 45, the control signal from the control device 34 is kept in the off state.

The raising and lowering control is performed such that the seedling planting device 3 is automatically driven up and down so that the ground height of the seedling planting device 3 is maintained at the set value during the planting traveling. As shown in FIG. 2, a potentiometer type float sensor 46 for detecting the vertical swing amount based on the variation of the ground pressure of the ground float 20 located at the center on the left and right is provided.
The control device 34 controls the electromagnetic valve 48 for the lift cylinder 4 so that the detection value XS of the lift cylinder 4 falls within the dead zone of the target value Sa of the potentiometer type sensitivity setting device 47 (see FIG. 7) provided on the aircraft control panel 13. Is automatically operated, the ground height of the seedling planting apparatus 3 is maintained at the set value.

As shown in FIG. 5, the float sensor 46
Is in the dead zone of the target value Sa of the sensitivity setting device 47, the state is maintained. Float sensor 46
Is larger than the target value Sa of the sensitivity setting device 47, the ascending electromagnetic solenoid UPS of the electromagnetic control valve 48
ol, a drive signal is output, and if the detection value XS of the float sensor 46 is smaller than the target value Sa of the sensitivity setting device 47, the lowering electromagnetic solenoid DWSol of the electromagnetic control valve 48
The driving signal is output to As described above, the elevation control includes the operation lever 32 having the planting position P, the descending position D, and the automatic position A.
This is performed only when any one of T is operated.

The sensitivity setting unit 47 changes the target reference attitude of the ground float 20 and changes the sensing load of the ground float 20 according to the hardness of the mud.
Can be corrected by a three-position changeover type correction switch 51 (see FIGS. 2 and 9). As shown in FIG. 8, by operating the correction switch 51, the change characteristic of the target value Sa of the sensitivity setting device 47 is changed by the parallel movement to the insensitive side (the target reference attitude of the ground float 20 is in the forward rising direction) and the sensitive side ( The target reference attitude of the landing float 20 is changed to the forward downward direction.

When the traveling speed of the traveling machine 1 is increased, the ground float 20 is likely to rise, and the seedling planting device 3
The sensitivity setting device 4
7, the change characteristic of the target value Sa is changed in accordance with the traveling speed of the traveling machine body 1. As shown in FIG. 2, a rotation speed sensor 5 for detecting the rotation speed of the engine 6
2. A potentiometer type shift position sensor 53 for detecting the shift position of the belt type continuously variable transmission 7 is provided.
The traveling speed of the traveling body 1 is calculated by the control device 34. If the traveling speed of the traveling body 1 is high (for example, 0.8
M / sec or more), the change characteristic of the target value Sa of the sensitivity setting device 47 is changed to the insensitive side, and the change amount increases as the traveling speed of the traveling machine body 1 increases.

A hydraulic pump (not shown) for the lift cylinder 4 is driven by the engine 6, and the flow rate of hydraulic oil for the lift cylinder 4 changes according to the rotation speed of the engine 6. As a result, the control device 34 changes the duty ratio of the pulse current supplied to the ascending and descending electromagnetic solenoids UPSol and DWSol of the electromagnetic control valve 48 in accordance with the rotation speed of the engine 6, and changes the duty ratio of the lift cylinder 4.
Is controlled so that the flow rate of the hydraulic oil with respect to is always kept constant. As shown in FIG. 9 and FIG.
1. The rolling switch 45 and the correction switch 51
It is arranged on the rear wheel fender 54 located on the lateral side of the driver's seat 31 and is configured to be covered with a lid 55 that can be opened and closed.

Next, the control of the control device 34 relating to the raising / lowering drive of the seedling planting apparatus 3 will be described with reference to FIGS. When a main switch (not shown) is turned on and operated to start control, an electromagnetic solenoid UPSo for raising and lowering the electromagnetic control valve 48 with respect to the lift cylinder 4.
1, the output to DWSol is turned off, the operation flag f0 of the lifting / lowering operation switch 35, the clutch switch 2
The operation flag f1, the operation flag f2 for raising / lowering control, and the operation flag f3 for reverse operation are set to "0" (steps # 1 and # 2).

When the operation lever 32 is operated to a position other than the automatic position AT, the operation flags f0 to f3 are set to "0", and when the operation lever 32 is operated to the neutral position N, the clutch motor If the clutch engagement signal STR for the clutch motor 27 is turned off and the clutch off switch 29 is on, the clutch disengagement signal STP for the clutch motor 27 is turned off. If the clutch off switch 29 is off, the clutch off signal STP
Is output, and the state where the planting clutch 12 is disengaged is maintained (steps # 3 to # 9). If the operation lever 32 is operated to a position other than the automatic position AT and the neutral position N when the main switch is turned on, the operation lever 32
Is operated to the neutral position N once, and then proceeds to the next step (step # 10).

When the operating lever 32 is operated to the raised position U, the clutch engagement signal STR is turned off, and after the operation flag f2 is set to "0", if the clutch off switch 29 is on, If the clutch disengagement signal STP is turned off and the link switch 38 is turned on (the seedling planting device 3 is raised), the electromagnetic solenoid UPSol of the electromagnetic control valve 48 is turned off and the link switch 38 is turned off. If it is off, the ascending electromagnetic solenoid UPSol of the electromagnetic control valve 48 is turned on, and the seedling planting apparatus 3 is driven up (steps # 11 to # 1).
7). If the clutch-off switch 29 is not on, the clutch disengagement signal STP is turned on, the implanting clutch 12 is disengaged, and the ascending and descending electromagnetic solenoids UPSol and DWSol of the electromagnetic control valve 48 are turned off. (Steps # 18 and # 19).

When the operating lever 32 is operated to the lowering position D, the output of the clutch engagement signal STR is stopped, and the planting clutch 12 is maintained in the disengaged state in the same manner as described above (step # 20). To # 23), the seedling planting apparatus 3 is driven downward (steps # 24 to # 26). When it is detected by the float sensor 46 that the seedling planting apparatus 3 has touched down, the above-described elevating control is executed (step # 27). At this time, if the link switch 38 is turned on, the ascending electromagnetic solenoid UPS of the electromagnetic control valve 48
ol is turned off, and the operation flag f2 is set to "1" (steps # 28 to # 30).

When the operating lever 32 is operated to the planting position P, the clutch-on signal STR is turned off, and then the clutch-on signal STR is output until the clutch-on switch 30 is turned on. 12 is turned on (steps # 31 to # 34), and thereafter, the elevation control is executed. Operation flags f other than operation flag f2
0, f1, and f3 are maintained at "0" (step # 3).
5).

Next, the case where the operation lever 32 is operated to the automatic position AT will be described. When the elevating operation switch 35 is turned on after the operation lever 32 is operated to the automatic position AT, the operation flag f0 is set to “1”, and
If the link switch 38 is in the ON state (the raising state of the seedling planting device 3), the operation flag f2 is set to “0”, the descending electromagnetic solenoid DWSol of the electromagnetic control valve 48 is turned ON, and the seedling is planted. The attachment device 3 is driven to descend (steps # 36, # 37, # 39 to # 43).

When the seedling planting apparatus 3 is driven to descend until it touches the ground, the operation flag f0 is set to "0", and the operation flag f2 is set to "1". 44 to # 48). If the link switch 38 is off when the raising / lowering operation switch 35 is turned on, the planting clutch 12 is disengaged and the seedling planting device 3 is driven up until the link switch 38 is turned on (step #). 49 to # 54), when the link switch 38 is turned on, the operation flag f0 is set to "0" (steps # 55 and # 56). When the raising / lowering operation switch 35 is turned on again during the raising or lowering drive of the seedling planting apparatus 3, the raising or lowering drive of the seedling planting apparatus 3 is reversed (steps # 56 to # 60). When the raising / lowering operation switch 35 is turned on (upward side) in the initial state, if the planting clutch 12 is not turned off, the operation returns to the initial state (steps # 37 and # 38).

When the clutch switch 25 is operated by the first and second operating tools 24 and 36 after the seedling planting apparatus 3 is driven down until it touches the ground, the operation flag f1 is set to "1". , The planting clutch 12 is turned on (steps # 61 to # 64), and the clutch-on switch 3 is turned on.
The alarm buzzer (not shown) operates until 0 is turned on. When the clutch-on switch 30 is turned on, the operation flag f1 is set to "0", the alarm buzzer is stopped (steps # 65 to # 69), and thereafter, the process proceeds to the lifting control.

After the operation lever 32 is moved to the automatic position AT, the reverse detection switch 37 detects that the main transmission lever 16 has been moved to the reverse position R. If the link switch 38 is not on, the operation flag is turned on. After f3 is set to “1” (steps # 70 to # 74), the process proceeds to step # 49. Thereby, the planting clutch 1
2 is turned off, the seedling planting apparatus 3 is forcibly driven up until the link switch 38 is turned on, and when the link switch 38 is turned on, the operation flag f3 is set to "0" ( Step # 56).

There is no ON operation of the lifting / lowering operation switch 35 or detection of the reverse detection switch 37, and the operation flag f3 is set to "1".
When the seedling planting device 3 is at the maximum ascending position and the operation lever 32 is operated from another position to the automatic position AT, or when the raising / lowering control is not performed, the seedling planting device 3 is set to 3 is held at the current elevating position (step # 75).
To # 79), otherwise, the process proceeds to the lifting / lowering control (steps # 80, # 46).

In the claims, reference numerals are provided to facilitate comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is a block diagram of raising and lowering driving of a seedling planting apparatus and operation of a planting clutch.

FIG. 2 is a block diagram of elevating control of the seedling planting apparatus.

FIG. 3 is a block diagram of the rolling control of the seedling planting apparatus.

FIG. 4 is a diagram showing a flow of the rolling control of the seedling planting apparatus.

FIG. 5 is a diagram showing a flow of raising and lowering control of the seedling planting apparatus.

FIG. 6 is a plan view showing an operation position of an operation lever.

FIG. 7 is a plan view showing the vicinity of a steering handle.

FIG. 8 is a diagram showing a change characteristic of a target value of a sensitivity setting device.

FIG. 9 is a plan view showing the vicinity of a tilt angle setting device, a rolling switch, and a correction switch.

FIG. 10 is a diagram showing a flow of raising / lowering driving of a seedling planting apparatus, operation of a planting clutch, and raising / lowering control.

FIG. 11 is a diagram showing a flow of raising / lowering driving of a seedling planting apparatus, operation of a planting clutch, and raising / lowering control.

FIG. 12 is a diagram showing a flow of raising / lowering driving of a seedling planting apparatus, operation of a planting clutch, and raising / lowering control.

FIG. 13 is a diagram showing a flow of raising / lowering driving of a seedling planting apparatus, operation of a planting clutch, and raising / lowering control.

FIG. 14 is a diagram showing a flow of raising / lowering driving of a seedling planting apparatus, operation of a planting clutch, and raising / lowering control.

FIG. 15 is an overall side view of a riding rice transplanter.

[Description of Signs] 1 traveling body 3 working device 12 working clutch 23 steering handle 36 operating tool

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B60K 17/28 B60K 17/28 C 25/00 25/00 A B62D 49/00 B62D 49/00 F K

Claims (4)

[Claims] 1. A steering handle (2) of a body operation section.
3) An operation tool (36) which is artificially operated is provided on the lower side, and the operation tool (36) is configured to be freely operable from a neutral position to one and the other, and provided to the traveling body (1). Out of the plurality of working functions of the working device (3), each time the operation tool (36) is operated from the neutral position to one of the two working functions, two of the three working functions are operated. When the operation state of the operation tool (36) is changed from the neutral position to the other operation state, the operation states of the two operation functions are alternately displayed.
An operation structure of a work vehicle configured to display an operation state of a remaining work function among the three work functions. 2. A steering handle (2) of an airframe control section.
3) An operation tool (36) which is artificially operated is provided on the lower side, and the operation tool (36) is configured to be freely operable from a neutral position to one and the other, and provided to the traveling body (1). Out of the plurality of working functions of the working device (3), each time one of the operating tools (36) is operated from the neutral position to the other, the normal operation state of the one working function is performed. And the reverse operation state appears alternately, and the operating tool (3
6) An operation structure of a work vehicle configured to display an operation state of the other work function when an operation is performed from the neutral position to the other. 3. The steering handle (2) of the body control section.
3) An operation tool (36) which is artificially operated is provided on the lower side, and the operation tool (36) is configured to be freely operable from a neutral position to one and the other, and provided to the traveling body (1). Among the plurality of working functions of the working device (3), a working function for driving the working device (3) upward, a working function for driving the working device (3) downward, and operating the working device (3). In the three working functions of operating the working clutch (12) to be in the stop state, every time the operating tool (36) is operated from the neutral position to one of the two working functions, two of the three working functions are operated. When the operation state of the operation tool (36) is changed from the neutral position to the other operation state, the operation states of the two operation functions are alternately displayed.
An operation structure of a work vehicle configured to display an operation state of a remaining work function among the three work functions. 4. An operation from the neutral position of the operating tool (36) to one and the other is performed by the steering handle (2).
3. The method according to claim 1, wherein the direction is set in a direction along the perspective direction to 3).
The operation structure of the work vehicle according to any one of Items 2 and 3.