JP2012237201A - Engine controller of working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an engine controller of a working machine which starts an engine without such disadvantages as vehicle jackrabbit start, and an engine stall, after stopping the operation of the engine.SOLUTION: The engine controller includes a controlling means H which executes an engine automatic stop processing stopping the operation of the engine by the operation of an operating tool other than a key switch, and also executes an engine automatic start processing starting the engine after stopping the operation of the engine. The controlling means H is configured to execute the engine automatic stop processing if it is detected that an engine stopping operation is started by the other operating tool, and is continuously performed longer than a set time, and also is configured to execute the engine automatic start processing if it is detected that a machine body stopping operation is performed by a traveling stopping operation detecting means ST after the engine automatic processing is executed.

Description

  The present invention provides an engine automatic stop process for stopping the operation of an engine based on an operation of an operation tool other than the key switch in a state where the key switch is turned on, and the engine automatic stop process. The present invention relates to an engine control device for a working machine provided with control means for executing an engine automatic start process for starting the engine after stopping the operation of the engine.

  Conventionally, in a riding type rice transplanter as an example of the work machine, as described in Patent Document 1, an engine in which a shifting operation tool for traveling other than a key switch causes a traveling stop state is provided. When operated to the stop position, the engine automatic stop process is executed, and after the engine operation is stopped by the engine automatic stop process, the speed change tool is operated with the key switch being operated to the on position. Some have been configured to execute an engine automatic start process when they deviate from the stop position.

Japanese Patent Laid-Open No. 2006-94753

  In the above-described conventional configuration, after the engine automatic stop process is executed and the operation of the engine is stopped, when the shift switch is removed from the engine stop position while the key switch is operated to the on position, the control means Since it is configured to execute the starting process, there are the following disadvantages.

  That is, the engine automatic stop process is executed and the operation of the engine is stopped, for example, while the work is being performed in the field. For example, the engine is stopped and the planting seedling is replenished. After that, the engine is started and the work is resumed in the field. At that time, after the driver starts the engine, the shift operation tool is moved forward from the engine stop position so as to start the work immediately. There is a case where the operation is immediately switched to the forward traveling position through the neutral position.

  However, in the above-described conventional configuration, when the speed change operation tool is removed from the engine stop position, the control unit executes the engine automatic start process to start the engine. However, after the engine start process is started, the engine is started. Since it takes a little time, it is conceivable that the traveling transmission is switched to the forward traveling state when the engine starts depending on how the driver operates. In this case, the vehicle body may suddenly start or stall as the engine is started.

  An object of the present invention is to provide an engine control device for a work machine that can start the engine without any disadvantages such as sudden start of the vehicle body or engine stall after stopping the operation of the engine. It is in.

  The engine control device for a work machine according to the present invention includes an engine automatic stop process for stopping the operation of the engine based on an operation of an operation tool other than the key switch in a state where the key switch is turned on, and Control means for executing an engine automatic start process for starting the engine after stopping the operation of the engine in the engine automatic stop process is provided. An engine stop operation detecting means for detecting that an operation for stopping the engine of the operating tool is performed, and a travel stop operation detecting means for detecting that an airframe travel stop operation for stopping the travel of the airframe is performed. And the control means starts an engine stop operation by the other operation tool based on detection information of the engine stop operation detection means. The engine automatic stop process is executed when it is detected that the engine has been continuously performed for a set time or longer. After the engine automatic stop process is executed, the travel stop operation detecting means When it is detected that the airframe traveling stop operation has been performed, the engine automatic start process is executed.

  According to the first characteristic configuration, when an operation for stopping the engine using another operation tool is started and continuously performed for a set time or longer, the control unit executes the engine automatic stop process and the engine is stopped. Even if the operation for stopping the engine is performed for a time shorter than the set time with another operation tool, the engine does not stop unexpectedly against the intention of the driver.

  And after the engine stop operation by another operation tool has been continuously performed for the set time or more based on the driver's intention and the engine is stopped, the vehicle travel stop operation is performed by the travel stop operation detecting means. When this is detected, the control means executes an engine automatic start process to start the engine. Incidentally, the airframe travel stop operation is an operation for stopping the travel of the airframe, and includes various operations such as a brake application operation and a main clutch disengagement operation.

  Thus, when the engine is started after the engine is stopped by executing the engine automatic stop process, it is necessary to perform a body stop operation, and the engine may be started when the engine and the traveling device are in a power transmission state. Even in such a case, by performing the airframe stop operation, the vehicle body is less likely to start suddenly or cause an engine stall as the engine starts.

  Therefore, according to the first characteristic configuration, after stopping the operation of the engine, the engine control device for a work machine that can start the engine without any disadvantage such as sudden start of the vehicle body or starting of the engine stall. I was able to provide.

  In addition to the first feature configuration, the second feature configuration of the present invention is configured by a travel stop operation tool in which the other operation tool stops traveling of the airframe, and the engine stop operation detecting means is configured to stop the engine stop. As an operation for operation, it is configured to detect that an operation for stopping the traveling of the airframe is performed by the travel stop operation tool.

  According to the second characteristic configuration, when the travel stop operating tool is operated and the operation is continuously performed for the set time or longer, the control means executes the engine automatic stop process and the engine is stopped. Since the engine is stopped based on the operation of the travel stop operating tool in this way, there is no disadvantage such as unexpected stop of the engine while the aircraft continues to travel.

  Incidentally, the travel stop operating tool may be operated, for example, to reduce the travel speed or temporarily stop the travel even during work travel, but is distinguished from such a temporary operation. For this purpose, a longer time is set as the set time.

  According to a third characteristic configuration of the present invention, in addition to the first characteristic configuration, the other operation tool is configured by a stop operation tool dedicated to engine stop other than the key switch, and the engine stop operation detection means includes: The engine stop operation is configured to detect that the stop operation tool is operated.

  According to the third characteristic configuration, when the stop operating tool dedicated to engine stop is operated and the operation is continuously performed for the set time or longer, the control means executes the engine automatic stop process to stop the engine. Become. Since this operating tool for stopping is a dedicated operating tool for stopping the engine, the driver will operate in a state in which he / she is conscious of stopping the engine, compared with other operating tools which are also used for other operations. Thus, it is possible to stop the engine with few operational errors.

  According to a fourth characteristic configuration of the present invention, in addition to the first characteristic configuration, the other operation tool is configured by a shift operation tool for traveling that can be operated at a plurality of operation positions. A predetermined operation position for stopping the engine is set in any one of the above, and the engine stop operation detecting means detects that the shift operation tool has been operated to the predetermined operation position as the engine stop operation. It is in the point.

  According to the fourth characteristic configuration, when the traveling speed change operating tool is operated to the predetermined operation position and the operation is continuously performed for the set time or longer, the control means executes the engine automatic stop process and the engine stops. It will be. In this way, the engine can be stopped by operating the shifting operation tool for traveling, which is always operated when maneuvering the aircraft, to the predetermined operation position, so that the driver has less troublesome operation. Can stop the engine.

  According to a fifth characteristic configuration of the present invention, in addition to the fourth characteristic configuration, the shift operation tool is located at a position deviating from a normal operation path for shift operation having an operation position for stopping traveling and an operation position for traveling shift. The predetermined operation position is set, and the movement path from the predetermined operation position to the normal operation path by the shift operation tool is bent.

  According to the fifth characteristic configuration, the predetermined operation position is set at a position deviating from the normal operation path for the shift operation, and the engine is stopped when the shift operation tool is operated to the predetermined operation position. Thereafter, an engine automatic start process is performed, and when the engine is started, the driver returns the speed change operation tool from the predetermined operation position to the normal operation path in order to start the vehicle running. At this time, since the movement path from the predetermined operation position to the normal operation path is bent, it takes a little time for the driver to return the transmission operating tool from the predetermined operation position to the normal operation path.

  As a result, it takes some time from the start of the engine start process to the start of the engine, but in parallel with the engine start process, an operation for returning the speed change operation tool from the predetermined operation position to the normal operation path is performed. Even in such a case, since it takes some time to return the speed change operation tool from the predetermined operation position to the normal operation path, the speed change operation tool returns to the normal operation path and is operated to the operation position for traveling speed change. When starting the aircraft from a stopped state, there is less risk of the vehicle starting suddenly or causing an engine stall as the engine is started. The vehicle speed can be obtained.

  In addition to any one of the first to fifth feature configurations, the sixth feature configuration of the present invention includes a brake operating tool that causes the airframe travel stop operation in the engine automatic start processing to operate a brake in a braking state, and , The operation of at least one of the clutch operating tools for disengaging the main clutch. When at least one of the brake operating tool and the clutch operating tool is operated, the travel transmission is forcibly At least one of the brake operation tool and the clutch operation tool, and the travel speed change operation tool or the travel speed change device are linked together so that the operation is restored to the neutral state. .

  According to the sixth characteristic configuration, when the driver operates the brake operation tool while the engine is stopped by executing the engine automatic stop process, the brake enters the braking state and stops the vehicle from traveling. In addition, the traveling transmission is forcibly returned to the neutral state accordingly. In addition, when the driver operates the main clutch operating tool while the engine is stopped due to the execution of the engine automatic stop process, the main clutch is disengaged and the power transmission state between the engine and the traveling device is cut off. Accordingly, the traveling of the airframe is stopped, and the traveling transmission is forcibly returned to the neutral state accordingly.

  As described above, when at least one of the brake operation tool and the clutch operation tool is operated, not only the traveling of the airframe is stopped, but also the traveling transmission device is in a neutral state. Is stopped and the brake is not braked, or even if the operation of the clutch operating tool is stopped and the power transmission state between the engine and the traveling device is restored, it does not switch to the traveling state. Thus, the traveling stop state is maintained as it is.

  As a result, when the engine is started as at least one of the clutch operating tool and the brake operating tool is operated, it is possible to accurately avoid the vehicle body from starting suddenly or causing an engine stall.

  In addition to any of the first to sixth feature configurations, the seventh feature configuration of the present invention is a work state in which work is performed by the work device installed in the machine body, or the work by the work device is executed. Working state detecting means for detecting whether or not the non-working state is provided, and when the control means detects the non-working state by the working state detecting means, the engine automatic stop process and the The engine automatic start process is not executed.

  According to the seventh feature, when the operation by the work device is not performed, the engine is stopped even if the operation for stopping the engine by another operation tool may be continuously performed for a set time or longer. do not do.

  When it is in a non-working state, for example, it may travel to move outside the field after the work in the field is completed, or it may be traveling on the road. In the state, it is possible to avoid disadvantages such as obstructing traveling by not stopping the engine.

  In addition to the seventh feature configuration, the eighth feature configuration of the present invention is such that the steering handle provided in the aircraft control unit is retracted upward and has a steering posture that can be operated by the driver sitting on the driver's seat. And a retreating posture that secures a boarding / exiting space. It is configured to detect that it is in a non-working state.

  If the steering handle is in the retracted position, the driver may be temporarily away from the aircraft, or may be leaving the engine. If the engine automatic stop process is performed in the stop operation, the driver may misunderstand it as a failure.

  On the other hand, according to the eighth feature configuration, if the steering handle is in the retracted posture, the working state detecting means detects that it is in the non-working state. Even if it is continuously performed, the engine does not stop, so that it is possible to avoid disadvantages such as a driver misunderstanding that it is a failure.

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 a power system diagram. It is a side view which shows the operation structure of a main transmission. It is a front view which shows the operation structure of a main transmission. It is a top view of the guide plate for gear shifting operation. It is a side view which shows the linkage state of the main transmission lever and brake operation. It is a side view which shows the linkage state of the main transmission lever and brake operation. It is a side view which shows the linkage state of the main transmission lever and brake operation. It is a control block diagram. It is a figure which shows a power supply state. It is a figure which shows the display content of an information display part. It is a side view which shows the attitude | position change state of a steering handle. It is a flowchart of control operation. It is a flowchart of control operation. It is a whole side view of the riding type rice transplanter of the state over a ridge. It is a figure which shows the operation state of an operation arm. It is a flowchart of control operation. It is a top view of the guide plate for gear shifting operation. It is a top view of the guide plate for gear shifting operation.

[First Embodiment]
Hereinafter, the case where the first embodiment of the engine control device for a working machine according to the present invention is applied to a riding rice transplanter as an example of the working machine will be described with reference to the drawings.

  As shown in FIGS. 1 and 2, the riding type rice transplanter according to the embodiment of the present invention is equipped with a pair of left and right steering operations and a front wheel 1 that can be driven, and a pair of left and right driveable rear wheels 2. A seedling planting device 4 as a working device is connected to a rear portion of the traveling body 3 via a link mechanism 6 so as to be driven up and down by a hydraulic cylinder 5 as an actuator. A fertilizer application device 7 is provided.

  A transmission case 9 that pivotally supports the front wheel 1 is connected and fixed to the front part of the body frame 8 in the traveling body 3, and a rear transmission case 10 that pivotally supports the rear wheel 2 is rolled to the rear part of the body frame 8. It is supported freely. In addition, an engine 12 is mounted horizontally on a front frame 11 extending forward from the mission case 9 and covered with a bonnet 13, and the front wheel 1 is operated on the aircraft control section located behind the engine 12. A steering handle 14, a driving seat 15, a driving unit step 16 and the like are provided for operating in the direction of the vehicle. Further, on the left and right of the front part of the machine body, there are provided a preliminary seedling table 17 for placing and storing the preliminary seedlings in a plurality of stages. ing.

  The seedling planting device 4 mounts seedlings for six strips, cuts out seedlings one by one from the lower end of the seedling platform 21 and the seedling platform 21 that are reciprocally moved laterally by a set stroke, and transplants them into the field. Six sets of rotary planting mechanisms 22 and three grounding floats 23 for leveling the planting site are provided.

  The fertilizer application device 7 is mounted on the traveling machine body 3 between the driver seat 15 and the seedling planting device 4. An unwinding mechanism 25, an electric blower 28 for wind-feeding the unloaded fertilizer to the groove forming device 27 provided in each grounded float 23 via the supply hose 26, and the like are provided on the surface G by the groove forming device 27. It is configured to send fertilizer into the groove and bury it.

  As shown in FIGS. 1 and 3, a main transmission 41 comprising a hydrostatic continuously variable transmission (HST) linked to the engine 12 is connected to the side of the mission case 9 and the output thereof is transmitted to the mission. It is input to the case 9 and is branched into a working system and a traveling system. As for the power of the branched work system, only the forward rotation power is taken out by the one-way clutch 42, and the work is performed through the inter-gear transmission mechanism 43 and the planting clutch (not shown) capable of six-speed gear shifting by manual operation. The power is taken out from a power take-out shaft (PTO shaft) 45 (see FIG. 1) and transmitted to the seedling planting device 4.

  The branched traveling system power is shifted into two stages of high and low by a gear-type sub-transmission device 47 and then branched again to the front wheel system and the rear wheel system. The power of the front wheel system is transmitted through a differential device 48 that can be differentially locked. The power of the rear wheel system is transmitted to the rear transmission case 10 via the transmission shaft 49 and is transmitted to the left and right rear wheels 2 via the multi-plate side clutch 50. Further, the rear transmission case 10 is equipped with a multi-plate brake 51 for stopping the airframe, and this brake 51 is mechanically applied to a foot operation type brake operation tool 52 provided at the right foot of the operation unit step 16. It is linked to.

  Further, as shown in FIGS. 7 to 10, a brake sensor S <b> 1 is provided as a travel stop operation detecting means ST that detects that the brake operating tool 52 has been depressed. The brake sensor S1 is configured to be in an off state when the brake operation tool 52 is not depressed, and to be switched on when the brake operation tool 52 is depressed.

Next, the shift operation structure of the main transmission 41 will be described.
The main transmission 41 is configured to be shifted by a main shift lever 53 (an example of an operation tool D other than the key switch) as a shift operation tool provided on the left side of the steering handle 14.
That is, as shown in FIGS. 4 and 5, a support bracket 56 is fixed to a handle post 55 erected so as to support the steering handle 14, and a support shaft 57 is attached to the left end portion of the support bracket 56. The detent plate 58 is supported so as to be able to swing back and forth around the lateral fulcrum a, and the main transmission lever 53 is supported on the detent plate 58 so as to be able to swing left and right around the fulcrum fulcrum b. A relay rotation member 60 is supported on a support frame 59 for standingly supporting the handle post 55 so as to be rotatable about a lateral fulcrum c. The relay rotation member 60 and the detent plate 58 are connected via a linkage rod 61. Furthermore, the relay rotation member 60 and the speed change arm 63 connected to the speed change operation shaft 62 of the main transmission 41 are linked via an operation rod 64.

A guide plate 65 is fixed to the support bracket 56, and a base end side guide portion 53 a that engages with a stepped guide groove 66 formed in the guide plate 65 is integrated with the base end portion of the main transmission lever 53. Is provided.
That is, as shown in FIGS. 5 and 7, a base end side guide portion 53 a formed by bending a rod body into a substantially L shape is provided at the base portion of the main transmission lever 53 in a state of being integrally fixed. . The base end side guide portion 53a is supported by the detent plate 58 so as to be rotatable around the fulcrum b in the front-rear direction, penetrates the guide groove 66 up and down, and the guide groove 66 and the base end side guide portion 53a. The main transmission lever 53 is guided so as to swing back and forth along a predetermined stepped operation path.

  As shown in FIG. 6, the stepped portion of the stepped operation path corresponds to the neutral position N of the main transmission 41. The neutral position N has a forward neutral position Nf and a reverse neutral position Nr, and the forward neutral position Nf. A forward speed change operation path F is formed in front of the rear side, and a reverse speed change operation path R is formed behind the reverse side neutral position Nr. The forward side neutral position Nf and the reverse side neutral position Nr correspond to the travel stop operation position, and the forward shift operation path F and the reverse shift operation path R correspond to the travel shift operation position. A normal operation path for shifting operation is configured.

  As shown in FIG. 4, the main transmission lever 53 is moved forward 5 by elastically engaging a detent roller 69 supported on the free end of the cantilever spring lever 68 into nine recesses 67 formed in parallel on the outer periphery of the detent plate 58. It can be held at the respective shift positions of the stage (F1 to F5), the neutral position N, and the reverse three stages (R1 to R3).

  As shown in FIG. 6, an engine stop position Q that causes a travel stop state is set on the lateral outer side of the forward side neutral position Nf in the guide groove 66 formed in the guide plate 65, and the base of the main transmission lever 53 is set. A stop position detection sensor S2 is provided as an engine stop operation detecting means ET for detecting that the end side guide portion 53a is operated to the engine stop position Q.

A front-rear fulcrum b that is the center of the lateral operation of the main transmission lever 53 is equipped with a torsion spring 70 so that the main transmission lever 53 is urged to move toward the forward-side neutral position Nf. It is configured.
Further, an elastic resistance member 79 made of a spring plate is provided between the forward side neutral position Nf and the engine stop position Q in the guide groove 66, and is suitable for movement from the forward side neutral position Nf to the engine stop position Q. It is comprised so that resistance may be provided.

  By setting the resistance force of the elastic resistance member 79 larger than the urging force that the main transmission lever 53 is operated toward the engine stop position Q by the torsion spring 70, the main transmission lever 53 is set to the forward side neutral position Nf. Even if the hand is released in the positioned state, the engine does not immediately shift to the engine stop position Q, but the operation to get over the elastic resistance member 79 is performed consciously to shift to the engine stop position Q.

  When the main transmission lever 53 is operated to the engine stop position Q, the stop position detection sensor S2 is turned on, and when the main transmission lever 53 is separated from the engine stop position Q, the stop position detection sensor S2 is turned off. ing.

Next, a link structure between the main transmission lever 53 and the brake operation tool 52 will be described with reference to FIGS.
When the brake operating tool 52 for stopping the fuselage is depressed in the forward traveling state in which the main shift lever 53 is operated in the forward transmission operation path F or the reverse traveling state in which the main transmission lever 53 is operated in the reverse transmission operation path R. The main transmission lever 53 and the brake operation tool 52 are linked and linked so that the main transmission lever 53 is forcibly returned to the neutral position N.

  In other words, a check operating member 81 is provided at a location on the rear side of the relay turning member 60 so as to be able to swing back and forth around the fulcrum e. The check operating member 81 is provided with a check fitting 81a whose position can be finely adjusted around a fulcrum f by an adjusting bolt 81b. The second contact pin 83 is configured to face the first contact pin 82 provided at the location from the rear, and the front edge portion of the check fitting 81 a is provided at a location below the fulcrum c of the relay rotation member 60. It is deployed to face the rear from the back.

  On the other hand, a check operation arm 85 is fixed to the other end portion of the pedal support shaft 84 to which the brake operation tool 52 is connected, and the check member is pivotally supported on the boss member 86 pivotally supported on the free end of the check operation arm 85. A rear end portion of the push-pull rod 87 extending rearward from the lower end of the operating member 81 is inserted and connected. Here, the push-pull rod 87 is inserted and supported so as to be slidable back and forth only within a certain range with respect to the boss member 86 and is pushed by a compression coil spring 88 that is preliminarily initially compressed and externally fitted to the push-pull rod 87. The pull rod 87 is slid to the front slide limit with respect to the boss member 86.

  FIG. 7 shows a state where the brake operating tool 52 is not depressed and the main transmission lever 53 is at the forward fifth speed F5, which is the highest forward speed, and FIG. 8 shows that the brake operating tool 52 is not depressed and operated. A state is shown in which the speed change lever 53 is at the reverse third speed R3 which is the maximum reverse speed.

  When the brake operating tool 52 is depressed while the main speed change lever 53 is in the forward speed change operation path F (state shown in FIG. 7), the check operation arm 85 is rotated counterclockwise in the figure to push and pull. The rod 87 is protruded forward (leftward in the figure), and the check operation member 81 is swung clockwise around the fulcrum e. As a result, as shown in FIG. 9, the check operation member 81 presses the first contact pin 82 forward, and the relay rotation member 60 is forcibly rotated counterclockwise around the fulcrum c. 53 is returned toward the neutral position N.

  Further, when the brake gear 52 is depressed while the main speed change lever 53 is in the reverse speed change operation path R (the state shown in FIG. 8), the check fitting 81a of the check operation member 81 moves the second contact pin 83 forward. The relay rotation member 60 is forcibly rotated clockwise around the fulcrum c, and the main transmission lever 53 is returned toward the neutral position N side.

When the main transmission lever 53 reaches the neutral position N (the state shown in FIG. 9), the first contact pin 82 and the second contact pin 83 are both in contact with the check operation member 81, so that the check operation member 81 and The relay turning member 60 is held in a fixed posture in which the main transmission lever 53 is in the neutral position N.
In addition, by adjusting the position of the check fitting 81a of the check operation member 81, the first contact pin 82 and the second contact pin 83 are brought into contact with the check operation member 81 so that the relay rotation member 60 is accurately neutralized. Can be restored.

  Here, the initial compression force applied by the compression coil spring 88 is set to be larger than the operating force required for forcibly moving the main transmission lever 53, and until the main transmission lever 53 reaches the neutral position N, The compression coil spring 88 is not compressed and deformed by an operation reaction force. Then, after the main transmission lever 53 reaches the neutral position N, when the brake operation tool 52 is further depressed, the check operation arm 85 moves against the push-pull rod 87 which cannot move forward, and the compression coil spring 88. Is further compressed and deformed, and is rotated counterclockwise in the figure to ensure a sufficient brake operation stroke.

  The sub-transmission device 47 is configured to be switchable in two stages, a planting shift state for planting work and a road-traveling shift state, and the sub-transmission device 47 is disposed on the left side of the driver seat 15. 54 to be operated. That is, the sub-transmission lever 54 is provided so as to be switchable between the planting shift operation position and the road travel operation position, and the shift state of the sub-transmission device 47 is switched based on the switching operation. During the planting operation in the field, the subtransmission device 47 is maintained in the planting shift state.

  A sub shift sensor S3 (an example of work state detecting means J) is provided for detecting whether the sub shift lever 54 is in the planting shift operation position or the road travel operation position. The lever 54 is configured to be in an on state when it is in a road travel operation position (non-working state), and is in an off state when in a planting shift state (working state).

  As shown in FIG. 10, the hydraulic cylinder 5 is provided with a control valve 32 for supplying and discharging hydraulic oil. When hydraulic oil is supplied to the hydraulic cylinder 5 by the control valve 32, the hydraulic cylinder 5 is contracted. When the seedling planting device 4 is raised and hydraulic oil is discharged from the hydraulic cylinder 5 by the control valve 32, the hydraulic cylinder 5 is extended and the seedling planting device 4 is lowered.

  Further, a link angle sensor S4 composed of a potentiometer for detecting the elevation angle of the link mechanism 6 with respect to the traveling machine body 3 is provided, and the detected value of the link angle sensor S4 is input to the control device H as a control means. By detecting the angle of the link mechanism 6 with respect to 3, the height of the seedling planting device 4 with respect to the traveling machine body 3 can be detected.

  An information display unit 36 using a liquid crystal display panel is provided at the center of the operation panel 35 located in front of the driver seat 15. Although not described in detail, the information display unit 36 displays, for example, that the remaining amount of seedlings has been reduced on the seedling table 21 or that the voltage of the battery V has decreased, and various other types. Information is displayed.

  As shown in FIG. 12, the information display unit 36 is provided with a 4-digit numerical value display unit 37 for displaying the accumulated operation time (hour meter) and the engine speed. The numerical value display unit 37 can display not only the hour meter and the engine speed, but also an alphabet, an * mark, and the like. Also comes to use. Incidentally, FIG. 12A shows a full lighting state in which all segments of the numerical value display section 37 are lit, and FIG. 12B shows a display example of the engine speed. 12C, 12D, and 12E show display examples in engine control as will be described later.

  As shown in FIG. 13, the steering handle 14 provided in the airframe control unit retreats upward, and a steering posture (state indicated by a phantom line in FIG. 14) that can be operated by the driver sitting on the driver seat 15. It is configured to be switchable between a retreating posture (state shown by a solid line in FIG. 14) that moves and secures a boarding / alighting space. Although not described in detail, the steering operation shaft 14a is configured to be able to be bent at an intermediate portion, and the steering handle 14 and the handle post 14b are integrally swingable around the horizontal axis P1 between the steering posture and the retracting posture. It is provided and can be held at any position by a position holding mechanism (not shown).

  A handle posture detection sensor S5 (an example of work state detection means J) that detects whether the steering handle 14 is in the steering posture or the retracted posture is provided. The steering wheel attitude detection sensor S5 is configured to be in an on state when the steering handle 14 is in a steering attitude, and in an off state when the steering wheel 14 is in a retracted attitude.

  As shown in FIG. 10, the detected values of the brake sensor S1, the stop position detection sensor S2, the auxiliary transmission sensor S3, the link angle sensor S4, and the handle posture detection sensor S5 are input to the control device H. In addition, An engine speed sensor S6 serving as an engine start state detecting means for detecting the speed of the engine 12 is provided, and information of the engine speed sensor S6 is also input to the control device H. In addition, voltage detection means (not shown) for detecting the voltage of the battery V is provided.

FIG. 11 shows a power supply state to the control device H and other electrical components. As shown in this figure, the control device H has a key switch 90 operated by a key K in a power-on position (ON). ), The battery V is powered on and activated.
Even if the key switch 90 is operated to the power-off position (OFF), the power supply is not stopped immediately, but the power supply is continued by the self-holding circuit 91. Is configured to shut off the self-holding circuit 91 and stop the power supply after the operation state of each part when the power is turned to the power-off position (OFF) is written and stored in a nonvolatile memory (not shown). . When the key switch 90 is operated to the start position (ST), the starter start relay 92 provided in the power supply path between the battery V and the engine start motor 93 is switched to the on state. The engine 12 is started by operating the starting motor 93.
Although not shown in the figure, a speed governor that can change and adjust the fuel supply amount to the engine 12 is provided, and the fuel supply amount increases as the speed increases in accordance with the operation state of the main transmission lever 53. In addition, an interlocking operation mechanism that interlocks the speed governor is provided.

  The main power supply line 95 that supplies power from the battery V to all electrical components including the control device H is provided with an intermittent circuit 96 that can be intermittently supplied with power. A drive circuit configured to be able to be switched between a power supply state and a cut-off state according to a command from the control device H, and to be operated by supplying power when the key switch 90 is operated to the start position (ST). 97 can be switched between a power supply state and a cut-off state.

  And even if the key switch 90 is maintained at the power-on position (ON), the control device H stops the operation of the engine 12 when the engine stop condition is satisfied, and then when the engine start condition is satisfied. The engine control for starting the engine is executed.

  The engine control is performed by temporarily stopping the engine 12 when performing seedling replenishment work for replenishing planted seedlings consumed in the seedling planting work, for example, when performing seedling planting work in the field. It is possible to suppress wasteful consumption of fuel and to reduce noise. Further, when the seedling replenishment work or the like is completed, the engine 12 can be started to perform the seedling planting work.

The engine stop condition is set such that the stop position detection sensor S2 is continuously turned on for a set time (for example, several seconds). The continuation operation for the set time is a condition that the engine 12 is not stopped by being turned on for a short time due to an erroneous operation.
Incidentally, the configuration for stopping the engine 12 is a configuration in which the fuel cutoff valve 74 that shuts off the fuel supply supplied to the engine 12 is switched to the cutoff state. In addition, as a structure for stopping the engine 12, as long as the engine 12 is provided with a spark plug, the power supply to the spark plug may be cut off.

Next, engine control by the control device H will be described based on the flowcharts of FIGS.
It is detected that the steering wheel attitude detection sensor S5 is turned on to detect that the steering wheel 14 is in the steering attitude, and that the auxiliary transmission sensor S3 is detected to be on and the auxiliary transmission 47 is detected to be in the planting transmission state. Then, the processing after step 3 is executed, but if the off state of the steering wheel position detection sensor S5 is detected or the off state of the auxiliary transmission sensor S3 is detected, the subsequent processing is not executed ( Steps 1, 2).

  When executing the processing after step 3, the main transmission lever 53 is operated to the engine stop position Q, the stop position detection sensor S2 is turned on, and this state continues for a set time (several seconds) or more (step 3 and 4), the display content of the information display unit 36 is changed to a display for displaying that the engine stop process is executed (step 5).

  As the display contents of the information display unit 36, for example, as shown in FIG. 12 (c), the display of “* ECO” is performed using a numerical value display unit 37, and further provided at the front center of the bonnet 13. A display lamp (not shown) provided at the tip of the center mascot 94 is flashed.

  Next, based on the detection information of the link angle sensor S4, the control valve 32 is controlled so that the hydraulic cylinder 5 is contracted, and the seedling planting device 4 is raised to the maximum ascending position as an example of the set lifting position. (Steps 6 and 7). When the seedling planting device 4 is raised to the maximum ascent position, an engine stop process for stopping the engine 12 is executed (step 8). Specifically, the operation of the engine 12 is stopped by switching the fuel cutoff valve 74 to the cutoff state and stopping the fuel supply to the engine 12.

  Even if the driver releases his hand from the main transmission lever 53 after the main transmission lever 53 is operated to the engine stop position Q and the engine 12 is stopped, the main transmission lever 53 is moved by the resistance force of the elastic resistance member 79. The engine stop position Q is maintained.

  When executing the engine stop process, the control device H stores the operation states (various work conditions and the like of the seedling planting device 4) of each part in the seedling planting operation that has been performed so far in a non-illustrated nonvolatile memory. When the engine 12 is started and the operation is resumed, the operation is performed in the same state as the stored operation state.

  If the engine start condition as described later is not satisfied even after the set time has elapsed after the engine stop process is executed (steps 9 and 10), the power supply is cut off to prevent the battery V from being discharged. (Step 11). Specifically, the switching circuit 96 is instructed to switch to the power cutoff state, so that the switching circuit 96 is cut off, and power supply to all electrical components is cut off.

  Incidentally, in order to start the engine 12 after switching to the power cut-off state in this way, the driver can respond by operating the key switch 90 to the start position (ST). That is, when the key switch 90 is operated to the starting position (ST), the drive circuit 97 is activated and the intermittent circuit 96 is switched to the power supply state, so that power is also supplied to the control device H and other electrical components. The engine 12 is also started.

When the engine 12 is stopped by the engine stop process, it is detected that the brake sensor S1 is switched from the off state to the on state by newly depressing the brake operating tool 52 (step 10). ) In addition, the information display unit 36 displays that the process for starting the engine 12 is executed (step 12), and the engine start process for starting the engine 12 by starting the rotation operation of the engine start motor 93 is started. (Step 13).
The display content of the information display unit 36 at this time is configured to display “N-ST” using a numerical display unit 37, for example, as shown in FIG.

  Thereafter, when it is detected based on the detection information of the engine speed sensor S4 that the detected engine speed is equal to or higher than the set speed and the engine 12 is started, the rotational operation of the engine start motor 93 (engine The start process is stopped, the display by the information display unit 36 is switched to the engine speed display (steps 14, 15, 16), and the process is terminated.

  When the driver depresses the brake operating tool 52 and the main transmission lever 53 is operated to the engine stop position Q and the engine 12 is stopped, the brake sensor S1 is turned on. However, at that time, since switching from the off state to the on state is not performed, the switching determination in step 9 is not performed, and the engine 12 is not started. When the driver once depresses the brake operation tool 52 and switches the brake sensor S1 to the OFF state after the engine 12 is stopped, the brake operation tool 52 is depressed again. The switch of the sensor S1 from the off state to the on state is detected, and the engine 12 is started.

  If the start of the engine 12 is not detected even after a set start time (for example, several seconds) has elapsed since the start of the rotation operation of the engine start motor 93, the engine start is started even if the engine 12 is not started. The rotation operation (engine start process) of the motor 93 is stopped (steps 17 and 18). Thus, wasteful consumption of electric power by the engine starting motor 93 is avoided.

  Then, when the set time for standby has elapsed after stopping the rotation operation of the engine start motor 93, the rotation operation of the engine start motor 93 is started again (steps 19 and 20). However, if the start of the engine 12 is not detected, the rotation operation of the engine start motor 93 is started again. In this way, the engine 12 can be accurately started while suppressing wasteful consumption of electric power.

  However, when the engine 12 is not started even if the rotation operation of the engine start motor 93 is performed more than the set number of times, for example, as shown in FIG. 12 (e), a numerical value display unit 37 in the information display unit 36 is used. "* EEE" is displayed, an error state is displayed, and the process is terminated (steps 20 and 21). At this time, the display of the information display unit 36 is made to blink so that the driver can easily recognize that it is abnormal.

[Second Embodiment]
Hereinafter, 2nd Embodiment of the engine control apparatus of the working machine which concerns on this invention is described based on drawing.
In this embodiment, the engine 12 is configured to be started or stopped in a state where the driver is away from the driver seat 15, but the configuration other than the configuration related to the engine control is configured. Since this is the same as that of the first embodiment, description of the same configuration will be omitted, and a different configuration will be described.

  As shown in FIG. 16, a seating sensor S7 is provided as working state detection means J that is turned on when a driver is seated on the driver seat 15 and is turned off when the driver is not seated. As shown in FIG. 16, an operation arm 100 as another operation tool D for operating the aircraft from the outer front side of the aircraft is provided at the front of the aircraft 3 as shown in FIG. 16.

  The operation arm 100 functions as a grip operating tool that holds the front end of the traveling machine body 3 by holding the grip part at the tip of the operating arm 100 and prevents the front part of the traveling machine body 3 from being lifted during crossing work. To do.

  As shown in FIG. 17, the operation arm 100 can be swung around a lateral axis on the base end side over a storage position C1 that swings toward the machine body and a work posture C4 that is positioned on the front side of the machine body. In addition, it is provided so that it can be held at any position by a friction holding mechanism (not shown). A potentiometer-type arm position detection sensor S8 for detecting the swing operation position of the operation arm 100 is provided.

  A lock holding tool (not shown) that locks by elastic displacement when the brake operation tool 52 similar to the first embodiment is depressed is provided, and the braking state is maintained even when the foot is released from the brake operation tool 52. It is configured to be able to. Further, there is provided a lock release device 101 that can be operated to release a locked state by a lock holder using an actuator such as a solenoid.

  Detection information of the seating sensor S7 and the arm position detection sensor S8 is input to the control device H. The control device H controls the engine start motor 93 and the fuel cutoff valve 74 as in the first embodiment, and locks them. The release device 101 is configured to be controlled.

Next, engine control at the time of overshooting by the control device H will be described based on the flowchart of FIG.
When the seating sensor S7 is turned off and a state in which the driver is not seated on the driver's seat 15 is detected (step 31), the position of the operation arm 100 detected by the arm position detection sensor S8 is shown in FIG. Thus, when the engine 12 is located in the storage side area W1 between the first operation position C2 and the storage position C1 set in the middle between the storage position C1 and the work position C4, the engine 12 operates at that time. If so, the operation of the engine 12 is stopped (steps 32, 33, 34).

  When the operation arm 100 is operated to be tilted to the work side area W2 closer to the work position C4 than the first operation position C2, if the engine 12 is stopped at that time, the engine 12 is started (steps 35 and 36). ). When the operation arm 100 is tilted beyond the second operation position C3 set in the middle between the first operation position C2 and the work position C4, the lock release device 101 is operated to hold the operation. The brake holding state is released by releasing the brake operation tool 52 (steps 37 and 38). It is to be noted that a speed change operation can be performed in a low speed state for overgoing by operating a speed change operation lever (not shown) that can be changed from the front and outside of the machine body.

  That is, when the driver leaves the driver's seat 15 and operates the operation arm 100 from the storage position C1 to the work position C4, the engine 12 is started and the braking state is released. However, the engine 12 can be started by operating from the outside of the machine body so that the vehicle can travel over the heel.

  Further, when the driver is seated on the driver's seat 15, the seating sensor S7 is turned on, and the engine control is not performed when the vehicle is over the heel as described above. In this state, in which position the operation arm 100 is located. Even if operated, the engine 12 does not stop or start in accordance with the operation.

[Another embodiment]
(1) In the first embodiment, the engine stop position Q is set laterally outside the forward-side neutral position Nf in the guide groove 66. However, as shown in FIG. The engine stop position Q may be set on the laterally outer side of the position Nr. In this case, the main transmission lever 53 may be urged to move toward the reverse side neutral position Nr at the neutral position N.

  Further, as shown in FIG. 20, the movement path Z from the engine stop position Q by the main shift lever 53 to the normal operation path for gear shifting operation may be bent. That is, the movement path Z is provided in a state of being bent in a substantially U shape in a plan view, and the main transmission lever 53 is moved from the engine stop position Q to the forward transmission operation path F or the reverse transmission operation path R. The configuration takes a little time.

  For example, when the engine automatic stop process is executed and the engine 12 is stopped, it is detected that the brake sensor S1 is switched from the off state to the on state by a new depression operation of the brake operation tool 52. When the engine start process is executed, the driver tries to run the vehicle, and the shift operation tool 53 is moved from the engine stop position Q to the forward shift operation path F or the reverse shift in parallel with the engine start process. An operation of moving to the operation route R may be performed.

  Even in such a case, since it takes a little time to move the shift operation tool 53 from the engine stop position Q to the forward shift operation path F or the reverse shift operation path R, the main transmission 41 is in the travel drive state. It is possible to save time until the vehicle starts, and when starting the aircraft from a stopped state, the vehicle body is less likely to suddenly start or stall as the engine 12 is started, and smoothly A desired vehicle speed can be obtained.

(2) In the first embodiment, when the brake operation tool 52 is operated, the main transmission lever 53 is interlocked so as to be forcibly returned to the neutral position N, and the brake operation tool 52 is depressed. In this case, the engine 12 is started regardless of whether or not the speed change operation tool 53 is located at the engine stop position Q. Instead of such a structure, the engine 12 is connected to the main transmission 41. During transmission, a main clutch (not shown) and a clutch operating tool (not shown) for operating the main clutch are provided, and the brake operating tool 52 is operated to a brake applied state (braking state). Alternatively, the engine 12 may be started when the clutch operating tool performs an operation of switching the main clutch to the disengaged state.

  Further, when the engine start process is executed, it may be a condition that the speed change operation tool 53 is not located at the engine stop position Q. That is, the engine 12 is started when the stop position detection sensor S2 is in the off state and the switch from the off state to the on state of the brake sensor S1 is detected while the engine 12 is stopped. It is good also as a structure controlled to do.

(3) In the second embodiment, the lock release device 101 can be operated to release the locked state by the lock holding tool that locks in the state where the brake operation tool 52 is depressed, and the operation arm 100 is the first one. Although the configuration is such that the lock release device 101 is activated when it is tilted beyond the two operation positions C3, the configuration described in the following (3-1) and (3-2) instead of such a configuration It is good.

  (3-1) A structure including a main clutch (not shown) in the middle of transmission from the engine 12 to the main transmission 41 and a clutch operating tool (not shown) for turning on and off the main clutch is provided. A lock holding tool (not shown) that locks by elastic displacement when the tool is stepped on and the main clutch is turned off is provided, and the main clutch disengaged state can be maintained even if the foot is released from the clutch operation tool. When the operation arm 100 is tilted beyond the second operation position C3, for example, an unlocking device is provided that can be unlocked by an actuator such as a solenoid. The main clutch may be switched to the engaged state by operating the lock release device.

  (3-2) A lock holder (not shown) that locks by elastic displacement while the main transmission lever 53 is operated to the neutral position N is provided. A lock release device that can be operated to release the stop state is provided, and when the operation arm 100 is tilted beyond the second operation position C3, the lock release device is operated to move the main transmission lever 53 in the forward transmission operation path F. Alternatively, it may be configured to switch to a state where it can be operated to the reverse shift operation route R.

(4) In each of the above embodiments, the main transmission lever 53 and the operation arm 100 at the front of the machine body are used as the operation tool D other than the key switch 90, but instead of such a configuration, the following ( It is good also as a structure as described in 4-1)-(4-3).

  (4-1) As an operation tool D other than the key switch 90, for example, an engine stop operation tool (not shown) including a push button switch or the like is provided as an engine stop operation detection means ET. , A detection sensor (not shown) for detecting that the stop operating tool is operated, and when the stop operating tool is operated continuously for a set time or longer, for example, the main transmission lever 53 is moved to any operating position. Even if it is operated, the engine 12 may be stopped. Further, the detection sensor may be provided not only on the operation panel 35 of the boarding operation unit but also on the grips of various operation levers such as the main transmission lever 53.

  (4-2) The brake operation tool 52 may function as an operation tool D other than the key switch 90. That is, while the engine 12 is operating, the brake operation tool 52 is newly operated to turn on the brake sensor S1, and the ON state continues for a longer set time (for example, several seconds to several tens of seconds). Then, for example, the engine 12 may be configured to stop regardless of the operation position of the main transmission lever 53. That is, the brake sensor S1 functions as the engine stop operation detecting means ST.

  (4-3) A structure including a main clutch (not shown) in the middle of transmission from the engine 12 to the main transmission 41 and a clutch operating tool (not shown) for turning on and off the main clutch, and stopping the engine As an operation detection means, a detection sensor (not shown) for detecting that the main clutch disengagement operation has been performed by the clutch operation tool is provided, and the main clutch disengagement operation by the clutch operation tool is continuously operated for a set time or longer. The engine 12 may be stopped regardless of the operation position of the main transmission lever 53.

(5) In the above embodiment, the work state detection means J is provided with the handle posture detection sensor S5 and the auxiliary transmission sensor S4, but the work state detection means J commands the on / off of the planting clutch. Detecting on / off operation of the clutch operating tool, detecting whether the machine height of the seedling planting device 4 is in the non-working position (maximum ascending position), traveling provided in the seedling planting device 4 An indicator for detecting whether or not an index creation marker (not shown) is maintained in the retracted position, or a seating sensor S7 may be used.

(6) Although the riding type rice transplanter has been exemplified as the working machine in the above embodiment, the present invention can also be applied to a riding type direct seeding machine and other working machines.

  The present invention is a working machine such as a riding type rice transplanter or a riding type direct sowing machine, and is applied to a working machine configured to stop the operation of an engine based on an operation of an operation tool other than a key switch. it can.

4 Working Device 14 Steering Handle 15 Driver's Seat 41 Traveling Transmission 12 Engine 51 Brake 52 Travel Stop Operating Tool (Brake Operating Tool)
53 Shifting operation tool 90 Key switch ES Engine stop position D Other operation tools ET Engine stop operation detecting means H Control means R, F Operating position for traveling speed change J Working state detecting means N Operating position for stopping traveling ST Running stop Operation detection means Q Predetermined operation position Z Movement path

Claims (8)

In the state in which the key switch is turned on, the engine automatic stop process for stopping the operation of the engine based on the operation of the operation tool other than the key switch, and the engine operation in the engine automatic stop process. An engine control device for a working machine provided with control means for executing an engine automatic start process for starting the engine after being stopped,
Engine stop operation detecting means for detecting that an operation for stopping the engine of the other operating tool has been performed, and detection of a travel stop operation for detecting that the airframe travel stop operation for stopping the travel of the airframe has been performed. Means, and
The control means is
When it is detected based on the detection information of the engine stop operation detecting means that the engine stop operation by the other operation tool is started and continued for a set time or longer, the engine automatic stop process is performed. Configured to run,
An operation configured to execute the engine automatic start process when it is detected by the travel stop operation detection means after the engine automatic stop process is performed. Engine control device. The other operation tool is constituted by a travel stop operation tool for stopping the travel of the aircraft,
The operation according to claim 1, wherein the engine stop operation detecting means is configured to detect that an operation to stop traveling of the airframe is performed by the travel stop operation tool as the engine stop operation. Engine control device. The other operating tool is composed of a stop operating tool dedicated to stopping the engine other than the key switch,
The engine control device for a working machine according to claim 1, wherein the engine stop operation detecting means is configured to detect that the stop operating tool is operated as the engine stop operation. The other operating tool is composed of a shifting gear operating tool that can be operated at a plurality of operating positions, and a predetermined operating position for stopping the engine is set at one of the plurality of operating positions.
The engine control device for a work machine according to claim 1, wherein the engine stop operation detecting means is configured to detect that the shift operation tool has been operated to the predetermined operation position as the engine stop operation. . The predetermined operation position is set at a position where the shift operation tool is out of a normal operation path for shift operation having an operation position for stopping traveling and an operation position for traveling shifting;
The engine control device for a working machine according to claim 4, wherein a path for movement from the predetermined operation position to the normal operation path by the shift operation tool is bent. The airframe travel stop operation in the engine automatic start process is at least one operation of a brake operation tool for operating a brake to a braking state and a clutch operation tool for operating a main clutch to disengage,
When at least one of the brake operating tool and the clutch operating tool is operated, the brake operating tool and the clutch operating tool are controlled so that the traveling transmission device is forcibly returned to the neutral state. The engine control device for a working machine according to any one of claims 1 to 5, wherein at least one of them is linked to a traveling speed change operation tool or the traveling transmission device. Work state detection means for detecting whether it is a work state for performing work by a work device mounted on the machine body or a non-work state in which work by the work device is not performed is provided,
The said control means is comprised so that the said engine automatic stop process and the said engine automatic start process may not be performed, when it is detected by the said working state detection means that it is the said non-working state. The engine control device for a working machine according to any one of the above. The steering handle provided in the aircraft control unit is configured to be switchable between a steering posture that can be operated by the driver sitting on the driver's seat and a retracting posture that retreats upward to ensure a boarding / alighting space. ,
8. The working state detecting means is configured to detect that the working state is in a working state when the steering handle is in the steering posture, and is in a non-working state when the steering handle is in the retracted posture. Engine control device for work machines.

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