JP2013063021A - Riding type working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform engine starting without difficulties while stopping the engine when an operator gets out an operation part of a machine body, for example when operating ridge-crossing of a riding type rice transplanter.SOLUTION: This riding type working machine includes an engine stopping means for stopping the engine based on the operation of a first operation tool 29 different from a key switch 32 while the key switch 32 is turned on; and an engine starting means for starting the engine based on the operation of a second operation tool 19 different from the key switch 32, after the engine is stopped by the engine stopping means while the key switch 32 is turned on.

Description

  The present invention relates to a riding type work vehicle such as a riding type rice transplanter or a riding type direct seeder.

  In a riding type rice transplanter, which is an example of a riding type working machine, as disclosed in Patent Document 1, an engine is placed on an operating path (neutral position) of a shifting lever with respect to a shifting lever that operates a transmission for traveling. When the shift lever is operated to the stop position when the key switch is turned on, the engine automatically stops. When the key switch is turned on, the shift lever is separated from the stop position. Some engines are configured to automatically start when operated to the position.

  As a result, if there are fewer seedlings on the seedling platform during planting work, the engine can be operated without operating the key switch by operating the speed change lever to the neutral position to stop the machine and then operating to the stop position. Therefore, it is possible to save fuel in replenishing seedlings to a seedling table that requires a relatively long time. When the replenishment of seedlings to the seedling table is completed, the engine can be started without operating the key switch by operating the shift lever from the stop position to another position.

Japanese Patent Laying-Open No. 2006-94753 (see FIG. 5)

  As described in the background art, in the riding type rice transplanter, replenishment of the seedling to the seedling platform is performed by the operator of the aircraft operating unit, and the engine is stopped when the seedling is replenished to the seedling platform. This is also done by the operator of the aircraft's driving department.

On the other hand, when entering a paddy field beyond a fence or leaving a paddy field on a riding rice transplanter, the operator must get out of the aircraft's driving unit and operate the aircraft from the ground at a sufficiently low speed. May be moved forward to move over 越 え る (over 畦 operation). In this case, it is preferable that the engine is stopped when the worker gets off the operating part of the airframe.
The present invention is configured so that the engine can be started without difficulty after the engine is stopped when the operator gets off the driving part of the airframe, for example, in the case of the overpass of the riding type rice transplanter. It is an object.

[I]
(Constitution)
The first feature of the present invention resides in the following configuration in a passenger work vehicle.
A key switch for starting and stopping the engine, a first operating tool different from the key switch, and a second operating tool that is separate from the key switch and can be operated from the ground,
Engine stop means for stopping the engine based on an operation of the first operation tool in a state where the key switch is turned on;
Engine starting means for starting the engine based on an operation of the second operation tool after the engine is stopped by the engine stop means in a state where the key switch is turned on.

(Operation and effect of the invention)
According to the first feature of the present invention, when performing the crossing operation, the operator of the driving unit of the machine body stops the engine by operating the first operating tool at a position before the kite. Next, the operator gets out of the driving section of the aircraft and starts to operate the aircraft from the ground. At that time, the ground operator operates the second operation tool that can be operated from the ground to operate the engine. Can be started.

  Thereby, the operator on the ground can easily start the engine by operating the second operation tool from the ground without performing the operation of returning to the driving unit of the aircraft and starting the engine. It was possible to improve the workability when the operator got out of the driving part of the aircraft and operated the aircraft from the ground.

[II]
(Constitution)
The second feature of the present invention resides in the following configuration in the riding type work vehicle of the first feature of the present invention.
The second operation tool is an operation lever that is operated to operate a brake for traveling provided in the airframe and extends forward.

(Operation and effect of the invention)
When performing crossing over maneuvers, the operator of the airframe's operating section may get off the ground from the airframe's operating section while stopping the airframe at the position before the saddle and holding the driving brake on the braking side. .

  According to the second feature of the present invention, when the operator gets off the driving unit of the aircraft and starts operating the aircraft from the ground in the overpass operation, the ground operator uses the second operating tool (operating lever) to Thus, it is possible to easily perform the starting operation and the operation of the brake for traveling, and it is possible to improve the workability when the operator gets off the driving unit of the aircraft and operates the aircraft from the ground.

[III]
(Constitution)
The third feature of the present invention resides in the following configuration in the riding type work vehicle of the first feature of the present invention.
The riding type work vehicle according to claim 1, wherein an operation member capable of pressing and lifting the front part of the airframe from the ground is provided in the front part of the airframe, and the second operation tool is provided in the operation member.

(Operation and effect of the invention)
Some passenger work vehicles are provided with an operation member at the front part of the fuselage which can be operated by pressing the lift of the front part of the fuselage from the ground. As a result, the operator on the ground can hold the operating member in the overpass operation to suppress the lifting of the front part of the aircraft.

According to the third feature of the present invention, when the operator gets off the driving part of the airframe and starts to operate the airframe from the ground in the overpass operation, the ground worker is provided with the operation member and the second operation member. The operation tool makes it easy to start the engine and hold down the front of the aircraft, so that the operator can work from the ground and operate the aircraft from the ground. Was able to improve.

[IV]
(Constitution)
A fourth feature of the present invention resides in the following configuration in the riding work vehicle of the first feature of the present invention.
The second operating tool extends forward from the front of the fuselage, and is an operation member that can be switched between a working posture capable of pressing the lifting of the front of the fuselage from the ground and a retracted posture along the front of the fuselage. It is.

(Operation and effect of the invention)
In passenger-type work vehicles, an operation member that extends forward from the front of the fuselage and can be operated to hold the lift of the front of the fuselage from the ground and can be switched to a retracted posture along the front of the fuselage. Some are equipped with. As a result, the operator on the ground can hold the operating member from the retracted position to the working position in the crossing operation of the heel, thereby suppressing the lifting of the front part of the aircraft.

According to the fourth feature of the present invention, when the operator gets off the operating part of the aircraft and starts operating the aircraft from the ground in the overpass operation, the ground operator uses the operation member to start the engine and The operation of suppressing the lifting of the front part can be easily performed, and the workability when the operator gets off the driving part of the body and operates the body from the ground can be improved.

[V]
(Constitution)
The fifth feature of the present invention resides in the following configuration in the riding type work vehicle of the first feature of the present invention.
The steering handle for steering the front wheels is configured to be switchable between a first posture in the rearward direction that can be operated from the driving unit of the aircraft and a second posture in the frontward direction that can be operated from the ground.
The riding type work vehicle according to claim 1, wherein the second operation tool is provided in an attachment member that is integrally operated with the steering handle and is switched to a first and second posture.

(Operation and effect of the invention)
In a passenger work vehicle, the steering handle for steering the front wheels is switched between a first obliquely-facing posture that can be operated from the driving part of the aircraft and a second obliquely-facing posture that can be operated from the ground. Some are freely configured. As a result, the operator on the ground can hold the steering handle in the second posture in the crossing operation of the heel so that the lift of the front part of the aircraft can be suppressed.
In this case, when the steering handle is switched to the second position, the steering handle accessory members (eg, the steering panel on the lower side of the steering handle, the shift lever located on the side of the steering handle, and other operation levers) are also changed. The second operation tool that is switched to the two postures and is provided on the attached member is also in the second posture that can be operated from the ground.

According to the fifth aspect of the present invention, when the operator gets off the driving unit of the body and starts to operate the body from the ground in the overpass operation, the ground operator can operate the steering handle and the second operation tool in the second posture. This makes it easy to perform engine start-up operations and operations to suppress the lift of the front of the aircraft, improving the workability when the operator gets off the aircraft's operating section and operates the aircraft from the ground. I was able to.

It is a whole side view of a riding type rice transplanter. It is a whole top view of a riding type rice transplanter. It is the whole front view of a riding type rice transplanter. It is a side view of the vicinity of a speed change lever, a brake pedal, and an operation lever. It is a top view of the lever guide of an operation panel. It is a top view of a guide member. It is a disassembled perspective view of a guide member, a stop position sensor, and a check arm. It is a block diagram of a control system. It is a figure which shows the flow of an engine stop and start operation. It is a side view of the vicinity of the guide member which shows the 1st another form of implementation of invention. It is a side view of the front part of the airframe which shows the 3rd another form of implementation of the invention.

[1]
As shown in FIG. 1, the airframe supported by the right and left front wheels 1 and the right and left rear wheels 2 is provided with a driving section 4 having a driver's seat 3 and is driven up and down by a hydraulic cylinder 7. A mechanism 5 is provided at the rear part of the machine body, and a four-row planting type seedling planting device 6 is supported through the link mechanism 5 so as to be movable up and down, thereby constituting a riding type rice transplanter as an example of a riding type work vehicle. Has been.

  As shown in FIGS. 1 and 2, the seedling planting device 6 includes one feed case 11, two transmission cases 9, and a pair of planting arms 10 that are rotatably supported at the rear part of the transmission case 6. The grounding float 12 is provided with four seedling setting surfaces and a seedling setting table 8 that is driven to reciprocate in the horizontal direction. As a result, the planting arm 10 takes out the seedling from the lower portion of the seedling rest base 8 and plantes it on the rice field as the seedling rest base 8 is laterally fed in the lateral direction.

  As shown in FIGS. 1, 2, and 3, a front bonnet 14 and a rear bonnet 15 that cover an engine 35, which will be described later, are provided at the front of the operation unit 4, with respect to the rear bonnet 15 fixed to the airframe. The part bonnet 14 is supported so as to be freely opened upward around a horizontal axis (not shown) at the rear upper part. A step 13 is provided between the driver's seat 3 and the rear bonnet 15 in the driving unit 4, and a step 17 for getting on and off from the right and left front portions of the step 13 to the right and left lateral sides of the front bonnet 14. Has been extended. The support posts 26 are provided on the right and left lateral sides of the step 17, and the reserve seedling table 18 is attached to the support posts 26.

[2]
Next, the transmission system to the right and left front wheels 1, the right and left rear wheels 2, and the seedling planting device 6 will be described.
As shown in FIG. 1, an engine 35 (diesel type) and a transmission case 20 are provided at the front of the airframe, and a hydrostatic continuously variable transmission 24 is connected to the left lateral surface of the transmission case 20. A front wheel support case 21 is connected to the right and left lateral surfaces, and the right and left front wheels 1 are supported by the front wheel support case 21 so as to be steerable. A rear axle case 23 is supported in a freely rolling manner at the rear part of the airframe, and right and left rear wheels 2 are supported by the rear axle case 23.

  As a result, as shown in FIG. 1, the power of the engine 35 is transmitted from the belt transmission 25 to the hydrostatic continuously variable transmission 24, the auxiliary transmission (not shown) installed in the transmission case 20, the front wheel differential device ( The left and right rear wheels are transmitted to the right and left front wheels 1 through a right transmission and a left side clutch (not shown) installed in the rear axle case 23 from the auxiliary transmission. 2 is transmitted. The power branched from between the hydrostatic continuously variable transmission 24 and the auxiliary transmission is transmitted to the transmission shaft 22 from a stock transmission (not shown) and a planting clutch (not shown) housed in the transmission case 20. To the seedling planting device 6.

  As shown in FIGS. 1, 2, and 3, an operation panel 16 is provided on the upper portion of the rear bonnet 15, and a steering handle 28 for steering the right and left front wheels 1 is provided at the center of the left and right of the operation panel 16. ing. In the operation panel 16, a shift lever 29 (corresponding to a first operation tool) for operating the hydrostatic continuously variable transmission 24 and a sub-shift lever 30 for operating the sub-transmission device are provided on the left side of the steering handle 28. An accelerator lever 31 for adjusting the speed of the engine 35 and a key switch 32 for starting and stopping the engine 35 are provided on the right side of the steering handle 28.

  As shown in FIGS. 1, 2, and 3, the sub-transmission device is configured to be variable in three stages, that is, a work travel position (medium speed), a travel travel position (high speed), and an overpass position (low speed). The auxiliary transmission is operated by the lever 30. A differential lock pedal 34 is provided at the rear of the right side of step 13. When the differential lock pedal 34 is stepped on, the front wheel differential device is differentially locked (diff lock state), and when the foot is released from the differential lock pedal 34, the differential lock pedal of the front wheel differential device is locked. The operation is released (the differential operation state).

As shown in FIGS. 1 and 2, the driving unit 4 is provided with an elevating lever 33 on the right side of the driver's seat 3, and the elevating lever 33 can be operated to an ascending position, a neutral position, a descending position, and a planting position. It is configured.
When the elevating lever 33 is operated to the raised position, the hydraulic cylinder 7 is raised while the planting clutch is operated in the disconnected state, and when the elevator lever 33 is operated to the neutral position, the planted clutch is operated to the disconnected state. In this state, the hydraulic cylinder 7 stops.

When the elevating lever 33 is operated to the lowered position, the hydraulic cylinder 7 is lowered while the planting clutch is operated in the disengaged state, and when the grounding float 12 contacts the surface, the elevating control operation is started (airframe) The hydraulic cylinder 7 automatically operates so that the seedling planting device 6 is maintained at the set height from the surface regardless of the posture change of the seedling, and the planting depth of the seedling by the planting arm 10 becomes the set depth. Maintained). When the elevating lever 33 is operated to the planting position, the planting clutch is operated in the transmission state in a state where the elevation control operation is performed, and planting of seedlings by the planting arm 10 is started.

As shown in FIGS. 1, 2, and 3, the steering handle 28, the transmission lever 29, the auxiliary transmission lever 30, the accelerator lever 31, the key switch 32, and the elevating lever 33 are seated on the operator (operator seat 3). It is provided at a position that can be reached by the operator, and can be operated by an operator of the driving unit 4 (an operator sitting on the driver's seat 3).

[3]
Next, the operation system of the hydrostatic continuously variable transmission 24 will be described.
As shown in FIG. 4, the hydrostatic continuously variable transmission 24 is configured to be steplessly variable to a neutral position, forward high speed side, and reverse high speed side. A fan-shaped speed change member 36 is swingably supported around the horizontal axis P1 inside the rear bonnet 15, and a speed change lever 29 is swingably supported around the front and rear axis P2 of the bracket 36a of the speed change member 36. The transmission lever 29 extends upward through the lever guide 41 of the operation panel 16.

As shown in FIG. 4, an L-shaped linkage arm 38 in a side view is swingably supported around the horizontal axis P <b> 3 inside the rear bonnet 15, and a speed change arm 36 b fixed to the speed change member 36. A linkage rod 39 is connected across the linkage arm 38, and a linkage rod 40 is connected across the trunnion shaft (not shown) of the hydrostatic continuously variable transmission 24 and the linkage arm 38.

  As shown in FIGS. 4 and 5, a lever guide 41 is opened in the operation panel 16. The lever guide 41 extends forward from the end of the neutral path 41N in the left-right direction and the end of the neutral path 41N on the side of the steering handle 28. The forward path 41F is provided, and the reverse path 41R extends backward from the end of the neutral path 41N on the auxiliary transmission lever 30 side.

  As a result, as shown in FIGS. 4 and 5, when the shift lever 29 is operated to the neutral path 41N of the lever guide 41, the hydrostatic continuously variable transmission 24 is operated to the neutral position. When the hydrostatic continuously variable transmission 24 is operated to the neutral position, the power of the engine 35 is cut off in the hydrostatic continuously variable transmission 24, and the right and left front wheels 1, right and left The power to the rear wheel 2 and the seedling planting device 6 is cut off, and the aircraft stops. When the speed change lever 29 is operated forward along the forward path 41F of the lever guide 41, the hydrostatic continuously variable transmission 24 is operated to the higher speed side of the forward travel. Is operated backward, the hydrostatic continuously variable transmission 24 is operated to the reverse high speed side.

[4]
Next, the brake 42 will be described.
As shown in FIG. 4, a brake 42 capable of braking the right and left front wheels 1 and the right and left rear wheels 2 is provided inside the mission case 20. A brake pedal 27 is supported around the horizontal axis P4 on the lower side of step 13 so as to be swingable up and down, and protrudes upward from the right step 17, and the linkage rod 43 extends between the brake pedal 27 and the brake 42. It is connected.

  The state shown by the solid line in FIG. 4 is the release position where the brake pedal 27 is not depressed, and when the brake pedal 27 is depressed from the state shown by the solid line in FIG. 4 to the braking position, the brake 42 enters the braking state. When the foot is released from the brake pedal 27, the brake pedal 27 returns to the release position by a return spring (not shown).

  As shown in FIG. 4, the operation arm 27b is fixed to the fulcrum shaft 27a (horizontal axis P4) of the brake pedal 27, and the tip of the operation arm 27b is bent. A linkage member 44 is fitted on the fulcrum shaft 27 a of the brake pedal 27 so as to be relatively rotatable, and a pair of elongated holes 44 a and 44 b are formed above and below the linkage member 44. A linkage arm 37 that is integral with the linkage arm 38 and swings around the horizontal axis P <b> 3 is provided, and the first linkage rod 45 and the second linkage rod 46 are connected to the linkage arm 37. The pin 45 a is inserted into the long hole 44 a of the linkage member 44, and the pin 46 a of the second linkage rod 46 is inserted into the long hole 44 b of the linkage member 44.

  The state shown in FIG. 4 is a state where the shift lever 29 is operated by the neutral path 41N of the lever guide 41 and the brake pedal 27 is released. In this state, the pin 45a of the first linkage rod 45 is located at the left end of the long hole 44a of the linkage member 44, and the pin 46a of the second linkage rod 46 is located at the right end of the slot 44b of the linkage member 44. doing.

  When the speed change lever 29 is operated to the forward path 41F of the lever guide 41 from the state shown in FIG. 4, the first and second linking rods 45, 46 are operated obliquely forward and upward by the linking arm 37, and the first linking rod 45. The pin 45a causes the linkage member 44 to rotate clockwise from the state shown in FIG. 4 to approach the tip (bending portion) of the operation arm 27b of the brake pedal 27 (the interchange action of the long hole 44b of the linkage member 44). Therefore, the movement of the pin 46a of the second linkage rod 46 does not affect the linkage member 44).

  When the speed change lever 29 is operated to the reverse path 41R of the lever guide 41 from the state shown in FIG. 4, the first and second linking rods 45, 46 are operated obliquely rearward and downward by the linking arm 37, and the second linking rod 46 is operated. The pin 46a causes the linkage member 44 to rotate clockwise from the state shown in FIG. 4 so as to approach the distal end portion (bending portion) of the operation arm 27b of the brake pedal 27 (conformity of the long hole 44a of the linkage member 44). Therefore, the movement of the pin 45a of the first linkage rod 45 does not affect the linkage member 44).

  Accordingly, when the brake pedal 27 is depressed to the braking position in a state where the shift lever 29 is operated to the forward path 41F (reverse path 41R) of the lever guide 41 as described above, the linkage member is operated by the operation arm 27b of the brake pedal 27. 44 is operated counterclockwise on the paper surface to return to the state shown in FIG. 4. The first lever rod 45 (second rod 46) and the linkage arms 37, 38 allow the speed change lever 29 to move the neutral path of the lever guide 41. Returned to 41N.

[5]
Next, the operation lever 19 and the operation member 48 will be described.
As shown in FIGS. 2, 3, and 4, an operation lever 19 (corresponding to a second operation tool) is fixed to the stepped portion 27 c of the brake pedal 27 and extends forward, and the ground is located in front of the fuselage. The operator can hold the operation lever 19 and operate the brake pedal 27 to the braking and release positions.

As shown in FIGS. 2 and 3, a holding lever 47 is supported on the right step 17 so as to be swingable to the left and right around the longitudinal axis, and the brake pedal 27 is depressed to the braking position as described above. By engaging the holding lever 47 with the brake pedal 27, the brake pedal 27 can be held at the braking position. The holding lever 47 can be operated by both the operator of the driving unit 4 (the operator sitting on the driver's seat 3) and the worker on the ground.

  As shown in FIGS. 1, 2, and 3, an arch-shaped operation member 48 is configured by the upper side grip portion 48 a and the right and left leg portions 48 b, and the center mascot 50 is attached to the grip portion 48 a of the operation member 48. The operation member 48 (leg part 48b) is supported so that rocking | fluctuation is possible around the horizontal axis P5 of the front part of the body.

As shown in FIG. 1, the operating member 48 extends forward from the front part of the fuselage to hold the lift of the front part of the fuselage from the ground and can be operated from the ground, and the storage unit stands up along the front part of the fuselage. The spring 49 that frictionally holds the operating member 48 is arranged on the horizontal axis P5 so that the operating member 48 can be held in any posture between the working posture A1 and the retracted posture A2. Provided in position.

[6]
Next, the stop position 41S of the lever guide 41 (stop position 55S of the guide member 55) will be described.
As shown in FIGS. 4, 6, and 7, a flat guide member 55 is fixed inside the rear bonnet 15, and the neutral path 55 </ b> N in the left-right direction and the neutral path 55 </ b> N on the side of the steering handle 28 are fixed to the guide member 55. The reverse path 55R extending forward from the end and the forward path 55F extending rearward from the end of the neutral path 55N on the side of the auxiliary transmission lever 30 are opened.

  As shown in FIGS. 4 and 6, the base portion of the speed change lever 29 is extended downward to form an operation portion 29a. The operation portion 29a includes the neutral path 55N, the forward path 55F, and the reverse path 55R of the guide member 55. Has been inserted. A spring 56 is attached to the base of the transmission lever 29, and the transmission lever 29 is urged by the spring 56 toward the control handle 28 (upward in the drawing of FIG. 5) (the operation portion 29a of the transmission lever 29 is the auxiliary transmission lever). It is urged to the side 30 (lower side of the drawing in FIG. 6).

As shown in FIGS. 6 and 7, in the guide member 55, a stop position 55 </ b> S is formed on the side of the auxiliary transmission lever 30 from the end of the neutral path 55 </ b> N on the side of the auxiliary transmission lever 30. The guide member 55 is provided with a stop position sensor 51 that detects that the base portion 29a is located at the stop position 55S. As shown in FIG. 5, in the lever guide 41, a stop position 41S is formed further on the side of the steering handle 28 from the end portion on the side of the steering handle 28 of the neutral path 41N.

In this case, as shown in FIGS. 4, 5, 6, and 7, the shift lever 29 is swingably supported around the horizontal axis P <b> 1 and the front and rear axis P <b> 2. Since the operation of the operation portion 29a of the lever 29 is reversed, the forward path 41F and the reverse path 41R of the lever guide 41 and the stop position 41S, and the forward path 55F and the reverse path 55R and the stop position 55S of the guide member 55 are mutually connected. The positional relationship is reversed.

  As shown in FIGS. 6 and 7, a check arm 53 is swingably supported around a pin 52 provided in the guide member 55, and a roller 53 a is supported at the tip of the check arm 53 so as to freely rotate. A spring 54 is connected across the bent base 53 b of the check arm 53 and the guide member 55. In a state in which the base portion 53a of the check arm 53 is in contact with the contact portion 55a of the guide member 55 by the biasing force of the spring 54, the roller 53a of the check arm 53 moves between the neutral path 55N of the guide member 55 and the stop position 55S. Intervening.

  As shown in FIGS. 5 and 6, in the state where the shift lever 29 (operation portion 29a) is positioned in the neutral path 41N of the lever guide 41 (neutral path 55N of the guide member 55), the shift lever 29 (operation portion 29a) is positioned. ) Is located at a position (a position before the stop position 41S (55S)) that contacts the roller 53a of the check arm 53 by the urging force of the spring 56. In this case, when the urging force of the spring 54 is larger than the urging force of the spring 56, the speed change lever 29 (operation unit 29 a) pushes the check arm 53 away and stops the lever guide 41 at the stop position 41 </ b> S (the guide member 55 at the stop position). 55S).

  As shown in FIG. 8, a starter 57 that starts the engine 35, an electromagnetically operated fuel cutoff valve 58 that shuts off the fuel to the engine 35 and stops the engine 35, and a potentiometer type that detects the operating position of the brake pedal 27. An operation position sensor 59 (see FIG. 4) is provided. The operation position (OFF position, ON position and start position) of the key switch 32, detection signals of the stop position sensor 51 and the operation position sensor 59 are input to the control device 60, and the control device 60 starts the starter 57 and the fuel cutoff valve 58. Is operated.

As shown in FIG. 8, an engine stop unit 61 and an engine start unit 62 are provided in the control device 60 as software. In the overpass operation, the control device 60 (the engine stop means 61 and the engine start means) is based on the operation position (OFF position, ON position, start position) of the key switch 32, and the detection signals of the stop position sensor 51 and the operation position sensor 59. 62), the starter 57 and the fuel cutoff valve 58 are operated as described in [7] described later.

[7]
Next, in the control at the stop position 41S of the lever guide 41 (the stop position 55S of the guide member 55), the operator moves down the aircraft at a sufficiently low speed while operating the aircraft from the ground while getting off the driving unit 4 of the aircraft. The operation for overriding the eyelids (the eyelid overriding operation) will be described with reference to FIG.

  When the key switch 32 is operated to the start position, the control device 60 and the starter 57 start the engine 35 (steps S1 and S2). When the key switch 32 is operated to the OFF position, the control device 60 and the fuel cutoff valve 58 are operated. As a result, the engine 35 is stopped (steps S1 and S3). Assume that the key switch 32 is operated to the ON position after the key switch 32 is operated to the start position and the engine 35 is started. (Steps S1, S2).

At the position before the heel, the operator of the vehicle operating unit 4 operates the speed change lever 29 to the neutral path 41N of the lever guide 41 (the neutral path 55N of the guide member 55) (at this time, the hydrostatic continuously variable transmission). The device 24 is operated to the neutral position and the machine body is stopped), and the lever guide 41 is operated to the stop position 41S (the stop position 55S of the guide member 55) (step S4).

When the shift lever 29 is operated to the stop position 41S of the lever guide 41 (stop position 55S of the guide member 55) during the operation of the engine 35 (steps S4 and S5), the timer starts counting (steps S5 and S6). When the set time has elapsed (step S8), the control device 60 (engine stop means 61) and the fuel cutoff valve 58 stop the engine 35 (step S9).
In this case, if the shift lever 29 is moved out of the stop position 41S of the lever guide 41 (the stop position 55S of the guide member 55) before the set time elapses, the stop operation of the engine 35 is not performed (step S7). ).

  After the stop operation of the engine 35 is performed, the operator of the driving unit 4 of the fuselage depresses the brake pedal 27 to operate the brake position, engages the holding lever 47 with the brake pedal 27, and presses the brake pedal 27. The brake gear is held at the braking position, and the auxiliary transmission lever 30 is operated to move the auxiliary transmission device to the overshoot speed (low speed).

  Next, the worker gets out of the driving unit 4 of the machine body, stands in front of the machine body, and operates the operation member 48 in the retracted posture A2 to the work posture A1. In this case, when the operation member 48 is operated to the working posture A1, this operation is transmitted to the front wheel differential device by a linkage rod (not shown), and the front wheel differential device is differentially operated.

When the key switch 32 is located at the ON position, the transmission lever 29 is located at the stop position 41S of the lever guide 41 (the stop position 55S of the guide member 55), and the engine 35 is stopped (steps S1, S4, S5). The worker on the ground removes the holding lever 47 from the brake pedal 27 and holds the operation lever 19 with his hand to operate the brake pedal 27 to the brake position side (stepping side) a little more, or releases the brake pedal 27 to the release position. When the operation is made to the side (return side) and the operation is again made to the braking position side (stepping side), this operation is detected by the operation position sensor 59 (step S10), and the control device 60 (engine starting means 62) and the starter 57 The engine 35 is started (step S11).
In this case, even if the worker on the ground removes the holding lever 47 from the brake pedal 27 and holds the operation lever 19 with his hand to operate the brake pedal 27 to the release position side (return side), the engine 35 can be started. You may comprise.

  Thereafter, the operator on the ground operates the brake pedal 27 to the release position by the operation lever 19, extends his hand, holds the speed change lever 29, and moves the speed change lever 29 to the stop position 41 </ b> S of the lever guide 41 (stop of the guide member 55. The operation is performed from the position 55S) to the forward path 41F (forward path 55F). As a result, the airframe begins to move forward at a sufficiently low speed, so that the worker on the ground holds the operating member 48 to suppress the lifting of the front part of the airframe and corrects the direction of the airframe while performing the overpass operation.

Apart from the start operation of the engine 35 as described above, the start operation of the engine 35 may be performed as follows.
In a state where the key switch 32 is located at the ON position and the engine 35 is stopped, the worker on the ground extends the hand to hold the speed change lever 29, and the speed change lever 29 is moved to the stop position 41S of the lever guide 41 (the guide member 55). The neutral path 41N (neutral path 55N) is operated from the stop position 55S) (steps S1, S4, S12).

When the operator on the ground removes the holding lever 47 from the brake pedal 27, holds the operation lever 19 with his hand, completely operates the brake pedal 27 to the release position, and operates again to the braking position, this operation is performed by the operation position sensor 59. When detected (step S13), the control device 60 (engine starting means 62) and the starter 57 start the engine 35 (step S11).

[First Alternative Embodiment of the Invention]
In the above-mentioned [Mode for Carrying Out the Invention], instead of starting the engine 35 by operating the operation lever 19, the following configuration may be adopted.
As shown in FIG. 10, the switch box 63 is attached to the grip 48a of the operation member 48, and the engine stop switch 64 is provided on the upper surface of the switch box 63 in a state where the operation member 48 is operated to the working posture A1. An engine start switch 65 (corresponding to a second operation tool) is provided on the rear surface of 63.

As a result, the operator on the ground operates the operating member 48 in the retracted posture A2 to the working posture A1 and operates the engine start switch 65, whereby the control device 60 (engine starting means 62) and the starter 57 start the engine 35. The operation is performed. In the crossing operation, the operator on the ground can operate the engine stop switch 64 to stop the engine 35.

As indicated by a two-dot chain line in FIG. 10, in a normal planting operation, the operating member 48 is operated to the retracted posture A2 and the center mascot 50 is set to the upright use posture, as indicated by the solid line in FIG. In addition, in the crossing operation, the operation member 48 may be operated to the work posture A1 and the center mascot 50 may be operated to the downward non-use posture.
Thereby, instead of the engine start switch 65 described above, the operator on the ground operates the center mascot 50 (corresponding to the second operation tool) to the non-use posture, so that the control device 60 (engine start means 62) and the starter are operated. The engine 35 may be started by 57.

[Second Embodiment of the Invention]
In the above-mentioned [Mode for Carrying Out the Invention], instead of starting the engine 35 by operating the operation lever 19, the following configuration may be adopted.
An intermediate posture is set between the working posture A1 and the retracted posture A2 of the operating member 48 (corresponding to the second operating tool), and the operating member 48 exceeds the intermediate posture from the retracted posture A2 side to the working posture A1 side. The engine 35 is configured to be started by the control device 60 (engine starting means 62) and the starter 57.
In this case, when the operating member 48 is operated from the working posture A1 side to the retracted posture A2 side beyond the intermediate posture, the control device 60 and the fuel cutoff valve 58 are configured to stop the engine 35. May be.

[Third Another Embodiment of the Invention]
In the above-mentioned [Mode for Carrying Out the Invention], instead of starting the engine 35 by operating the operation lever 19, the following configuration may be adopted.
As shown in FIG. 11, in the upper operation panel 16, a control handle 28 is provided at the center of the left and right of the operation panel 16, and a shift lever 29 for operating the hydrostatic continuously variable transmission 24 on the left side of the control handle 28 and A sub-shift lever 30 is provided, and an accelerator lever 31 for adjusting the speed of the engine 35, a key switch 32 for starting and stopping the engine 35, and a lift lever 33 are provided on the right side of the steering handle 28.

  As shown in FIG. 11, the steering handle 28 is configured to be freely switchable between a first posture B1 which is obliquely rearwardly operable from the driving unit 4 of the aircraft and a second posture B2 which is obliquely forwardly operable from the ground. The operation panel 16 (corresponding to the attached member), the shift lever 29 (corresponding to the first and second operation tools), the auxiliary shift lever 30, the accelerator lever 31, the key switch 32, and the lift lever 33 are integrated with the steering handle 28. The first and second postures B1 and B2 are configured to be switched.

  When a stop position is provided in the operation path of the shift lever 29 and the shift lever 29 is operated to the stop position, the stop operation of the engine 35 is performed by the control device 60 (engine stop means 61) and the fuel cutoff valve 58, and the shift lever 29 When the engine is operated to a position other than the stop position, the engine 35 is started by the control device 60 (engine starting means 62) and the starter 57.

As a result, when performing the crossing operation, the operator of the airframe operating unit 4 operates the shift lever 29 to the stop position at the position before the reed (the steering handle 28 and the operation panel 16 are in the first posture B1). The stop operation of the engine 35 is performed by the control device 60 (engine stop means 61) and the fuel cutoff valve 58.
Next, the operator gets out of the driving section 4 of the fuselage and stands in front of the fuselage, switches the steering handle 28 and the operation panel 16 in the first posture B1 to the second posture B2, and sets the shift lever 29 to a position other than the stop position. The engine 35 is operated by the control device 60 (engine starting means 62) and the starter 57 by operating to the position.

In this case, the control device is operated by operating the lift lever 33 instead of the speed change lever 29 or by operating a dedicated switch provided on a handle cover (not shown) that covers the base of the operation panel 16 or the steering handle 28. The engine 35 may be stopped by the engine 60 (engine stop means 61) and the fuel cutoff valve 58, and the engine 35 may be started by the controller 60 (engine start means 62) and the starter 57.

In the first posture B1 of the steering handle 28, after the stop operation of the engine 35 is performed by the control device 60 (engine stop means 61) and the fuel cutoff valve 58 by the shift lever 29 and the like as described above, the steering handle 28 is moved. When the switching operation is performed to the second posture B2, the engine 35 may be started by the control device 60 (engine starting means 62) and the starter 57.

[Fourth Embodiment of the Invention]
In the above-mentioned [Mode for Carrying Out the Invention] [First Alternative Embodiment of the Invention] [Second Alternative Embodiment of the Invention] [Third Alternative Embodiment of the Invention], the diesel-type engine 35 is used instead. When the gasoline type engine 35 is used, the control device 60 (engine stop means 62) may be configured to stop the engine 35 by shutting off the electrical system of the ignition plug of the engine 35.

[Fifth Embodiment of the Invention]
In the above-mentioned [Mode for Carrying Out the Invention] [First Another Mode of Carrying Out the Invention] to [Fourth Another Mode for Carrying Out the Invention], the shift lever 29 is moved to the stop position 41S of the lever guide 41 (the guide member 55). Instead of the configuration in which the engine 35 is stopped by operating to the stop position 55S), the engine 35 may be stopped by the operations described in (1) to (6) below. Good.

(1) The transmission lever 29 is operated to the neutral path 41N (the neutral path 55N of the guide member 55) of the lever guide 41.
(2) The stop position 41S, 55S is connected to a part of the forward or reverse path 41F, 41R (the forward or reverse path 55F, 55R of the guide member 55) of the lever guide 41, and the speed change lever 29 (operation part 29a) is connected. It is operated to this stop position 41S (55S).
(3) The auxiliary transmission lever 30 (corresponding to the first operation tool) is operated to the neutral position.
(4) The brake pedal 27 (corresponding to the first operating tool) is held at the braking position for a set time or more.
(5) In a transmission system from the engine 35 to the front wheels 1 and the rear wheels 2 and the seedling planting device 6, a clutch pedal (not shown) that includes a main clutch at a position closest to the engine 35 and operates the main clutch ( Corresponding to the first operating tool), and the main clutch is operated to be disconnected by the clutch pedal.
(6) A dedicated engine stop switch (corresponding to the first operation tool) for stopping the engine 35 other than the key switch 32 is provided, and this engine stop switch is operated.

  The present invention is applied not only to a riding type rice transplanter but also to a riding type work vehicle such as a riding type direct seeding machine equipped with a direct sowing device at the rear part of the aircraft, and a riding type working vehicle equipped with an engine under the driver's seat. it can.

DESCRIPTION OF SYMBOLS 1 Front wheel 4 Driving | running | working part 16 Attached member 19,29,48,65 2nd operation tool 28 Steering handle 29 1st operation tool 32 Key switch 35 Engine 42 Brake 48 Operation member 61 Engine stop means 62 Engine starting means A1 Working posture A2 Storage Posture B1 First Posture B2 Second Posture

Claims (5)

A key switch for starting and stopping the engine, a first operating tool different from the key switch, and a second operating tool that is separate from the key switch and can be operated from the ground,
Engine stop means for stopping the engine based on an operation of the first operation tool in a state where the key switch is turned on;
Riding is provided with engine starting means for starting the engine based on an operation of the second operating tool after the engine is stopped by the engine stopping means in a state where the key switch is turned on. Type work vehicle.   The riding work vehicle according to claim 1, wherein the second operation tool is an operation lever that operates a brake for traveling provided in the airframe and extends forward. The riding type work vehicle according to claim 1, wherein an operation member capable of pressing and lifting the front part of the airframe from the ground is provided in the front part of the airframe, and the second operation tool is provided in the operation member.   The second operating tool extends forward from the front of the fuselage, and is an operation member that can be switched between a working posture capable of pressing the lifting of the front of the fuselage from the ground and a retracted posture along the front of the fuselage. The riding type work vehicle according to claim 1. The steering handle for steering the front wheels is configured to be switchable between a first posture in the rearward direction that can be operated from the driving unit of the aircraft and a second posture in the frontward direction that can be operated from the ground.
The riding type work vehicle according to claim 1, wherein the second operation tool is provided in an attachment member that is integrally operated with the steering handle and is switched to a first and second posture.

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