JP2020175800A - Working vehicle - Google Patents

Abstract

To provide a working vehicle which can improve the operability of a lighting switch, and can surely extinguish the lighting switch without being conscious of the extinguishment of working lamps when extinguishing headlamps, in the working vehicle having the headlamps for lighting a front part of a vehicle, tail lamps for notifying the existence of an own vehicle and a vehicle width, and the working lamps for lighting a point necessary for work, and having the lighting switch for lighting and extinguishing these lamps at an operation part.SOLUTION: A lighting switch 57 arranged at an operation part is constituted so as to be switchable in an extinguishment position for extinguishing all lamps by using a single operation tool 59, an on-road traveling position for lighting headlamps 50 and tail lamps 53, and a working traveling position for at least lighting the headlamps 50 and working lamps 51, 52.SELECTED DRAWING: Figure 4

Description

The present invention relates to a work vehicle mainly for agriculture such as a tractor, a passenger type rice planting machine, or a combine, and more specifically, for a headlight that illuminates the front of the vehicle, a taillight that informs the existence and width of the vehicle, and work. The present invention relates to a work vehicle provided with work lights for illuminating necessary parts and provided with a lighting switch in the control unit for turning on and off these light lights.

Agricultural work vehicles perform various operations such as cultivating or leveling fields, planting or sowing seedlings in the prepared fields, or harvesting the planted and sown crops. Then, the work vehicle performs work traveling while traveling by itself in the field and traveling on the road traveling on a public road or a farm road for moving to the field.

In addition, such work vehicles may work not only during the day but also at dusk or at night, or may run on the road in the middle of the night to get home, and the headlights that illuminate the front of the vehicle and the own vehicle Equipped with taillights that inform the existence and width of the vehicle. Furthermore, when the work vehicle is performing its work, it is important to run the traveling machine as straight as possible and at regular work intervals in order to reduce unworked areas and overlapping work areas and improve work efficiency. Equipped with a work light that illuminates the parts required for work.

As work lights provided in this case, it is known to provide a main work light that illuminates the surroundings of the vehicle and an auxiliary work light that illuminates the front side of the vehicle. Among them, the main work light is a cabin that covers the control unit. It is attached under the roof or above the safety frame to illuminate the ground surface in front of the vehicle, which is relatively close to the vehicle, to distinguish the boundary between the work area and the unworked area, and to illuminate the ground surface behind the vehicle, which is relatively close to the vehicle. It is used to confirm the presence or absence of an area and the working state (see, for example, Patent Document 1).

In addition, the auxiliary work light that illuminates the front side of the vehicle is attached to the front part of the bonnet that covers the engine together with the headlight, for example, to illuminate the ground surface from the front part of the front wheel to the side of the front wheel, and the front wheel when the vehicle turns. It is used to determine the steering state and the boundary between the already working area and the unworked area so that the turning operation can be performed accurately (see, for example, Patent Documents 1 and 2).

Japanese Unexamined Patent Publication No. 2005-186665 Japanese Unexamined Patent Publication No. 2003-341424

As described above, the work vehicle can efficiently carry out the work run by turning on the work light together with the headlight when the work run is carried out at night. In addition, when driving on the road at night, turn on the headlights that illuminate the front of the vehicle and the taillights that indicate the existence and width of the vehicle, and turn off the work lights because they are annoying to other vehicles. It is possible to drive safely.

However, a work vehicle equipped with a work light together with a headlight in this way often has a separate lighting switch for turning on and off the headlight and the work light. Therefore, for example, for each lighting switch provided on the control panel portion of Patent Document 2, one operating tool is operated by its rotation while selecting the operating tool, and the other operating tool is switched on and off by its tilting operation. Since it has to be done, there is another problem that it lacks operability.

Moreover, when the headlights are turned off, the work lights can also be turned off, but conversely, when the headlights are turned on, the work lights are turned on or off depending on the switching state of the lighting switch, and the vehicle travels on the road at night. In that case, it is troublesome to turn off the work light continuously. In addition, when a main work light that illuminates the surroundings of the vehicle and an auxiliary work light that illuminates the front side of the vehicle are provided as work lights, providing these lighting switches separately increases annoyance and near the steering wheel of the control unit. The lighting switches are distributed under the roof of the cabin or on the side console away from the vehicle, which deteriorates the operability.

On the other hand, headlights and work lights need to ensure the visibility of workers and notify pedestrians and other vehicles of the existence of their own vehicles. Therefore, in addition to the current mainstream halogen lights, HID lamps (High Intensity Discharge lamps) ) And LED (Light Emitting Diode) lamps are also beginning to be adopted. However, if a large number of these lights are provided and turned on at the same time, a large current capacity is required, which causes the battery to run down.

In addition, when driving on the road at night, it is necessary to turn on the headlights that illuminate the front of the vehicle and the taillights that inform the existence and width of the vehicle, and turn off the work lights because they are annoying to other vehicles. There is. Therefore, in order to turn off the work light even if the work light is neglected, for example, as in Patent Document 1, switching to a high-speed position of the auxiliary transmission operation, rotation detection of the traveling system drive shaft by the front and rear wheel rotation sensors, and work By switching the switching dial to the traveling position, the work light is automatically turned off by regarding it as traveling on the road, so that the worry of forgetting to turn it off can be eliminated and the operational burden can be reduced.

However, even when traveling on the road, there are cases where the vehicle does not always travel at high speed, the operation of switching the work switching dial to the traveling position is neglected, or the work is performed without accelerating the front wheels. There is room for consideration in determining how to drive on the road. Furthermore, after finishing driving on the road and turning off the headlights, the engine is stopped and stopped, and when the engine is started and the vehicle is started for driving on the road the next day or the like, the lighting switch of the work light is used. If is left in the lighting position, there is a risk of traveling on the road with the work light turned on.

Therefore, in view of the above-mentioned problems, the present invention includes a headlight that illuminates the front of the vehicle, a taillight that informs the existence and width of the vehicle, and a work light that illuminates a part necessary for work. In a work vehicle in which a lighting switch for turning off the lights is provided in the control unit, the operability of the lighting switch is improved, and when the headlights are turned off, the work lights can be turned off without being aware of the turning off. The challenge is to provide a vehicle.

In order to solve the above problems, the present invention first includes a headlight that illuminates the front of the vehicle, a taillight that informs the presence and width of the vehicle, and a work light that illuminates a part necessary for work. In a work vehicle in which a lighting switch for turning on and off the lights is provided in the control unit, the lighting switch provided in the control unit is turned off with a single operating tool, and the presence of the headlight and the own vehicle. It is characterized in that it can be switched to a road traveling position where a tail light indicating the width of the vehicle or a vehicle is turned on, and a working running position where at least the headlight and the work light are turned on.

Secondly, the present invention comprises the main work light that illuminates the surroundings of the vehicle and the auxiliary work light that illuminates the front side of the vehicle, and at least the headlight and the auxiliary work light are used by the operating tool. It is characterized in that it can be switched to a first work running position to be turned on, and at least a second working running position to turn on the headlight and the main work light.

Further, the present invention is characterized in that, thirdly, the taillight is turned on together with the headlight and the auxiliary work light at the first work traveling operation position. Fourth, the present invention is characterized in that the auxiliary work light is turned on together with the headlight and the main work light at the second work travel position.

Fifth, in the present invention, when the work vehicle travels on the road when the operating tool is switched to the work travel position, the headlight and the tail light are turned on and the work light is turned off. It is characterized by. Sixth, the present invention assumes that the work vehicle travels on the road when the manual operating tool for adjusting the engine speed is operated at a low speed in preparation for the control unit. It is characterized in that the light and the tail light are turned on and the work light is turned off.

Moreover, in the seventh aspect of the present invention, the meter panel provided in the control unit is provided with a monitor lamp that lights and displays that the operating tool has been switched to the working traveling position, and the working vehicle travels on the road. When this is performed, the monitor lamp is switched from a continuously lit state to a blinking state to give a warning.

According to the work vehicle of the present invention, a headlight that illuminates the front of the vehicle, a taillight that informs the presence and width of the vehicle, and a work light that illuminates a part necessary for work are provided, and these light lights are turned on and off. In a work vehicle in which a lighting switch is provided in the control unit, the lighting switch provided in the control unit informs the extinguishing position of turning off all of these lights with a single operating tool, the presence of the headlight and the own vehicle, and the vehicle width. It is configured so that it can be switched to a road running position where the taillight is turned on and a working running position where at least the headlight and the work light are turned on.

Therefore, when driving on the road at night, it is safe to turn on the headlight and the taillight that informs the existence and width of the vehicle by switching the single operating tool of the lighting switch provided in the control unit to the road driving position. It is possible to drive on the road. Further, when the work running at night is performed, the headlights and the work lights can be turned on at least by switching the same operating tool to the working running position, and the work running can be performed efficiently.

Further, the work light can be turned off by switching the operation tool from the work running position to the road running position when the work running is completed and the road running is performed, and the work light can be turned off when the road running is completed and the vehicle is parked. When the operating tool is switched to the off position to turn off the headlight, all lights including the work light as well as the headlight are turned off. Therefore, the work light can be turned off without being aware of it, and the work light will not turn on unless the operating tool is switched to the work running position again. Therefore, the work light turns on unexpectedly and is turned on. It is possible to eliminate the troublesome operation for turning off the lights.

In many cases, the work light illuminates the surroundings of the vehicle, and the presence or width of the own vehicle can be notified by lighting the work light. In addition, it is extremely rare for pedestrians and other vehicles to enter the field during work driving. Therefore, when the operating tool is switched to the work traveling position to turn on the headlight and the work light, if the taillight that informs the existence of the own vehicle and the width of the vehicle is turned off without being turned on, the taillight is turned on. It is possible to reduce the power consumption of the alternator, reduce the load on the alternator, and prevent the battery from running out.

In addition, the work light is composed of a main work light that illuminates the periphery of the vehicle and an auxiliary work light that illuminates the front side of the vehicle, and at least the headlight and the auxiliary work light are turned on by the operating tool. When the headlight and the main work light are configured to be switchable to at least the second work running position, the headlight and the auxiliary work light are turned on by operating the operating tool depending on the twilight or the work content. The work run and the second work run in which the headlight and the main work light are at least turned on can be easily selected.

Further, in the first work running position, when the tail light is turned on together with the headlight and the auxiliary work light, the tail light indicating the existence of the own vehicle and the width of the vehicle is turned on to illuminate the rear of the vehicle, for example, to the rear. It is possible to check the ascending / descending state and working state of the work equipment to be connected. In addition, when there are pedestrians or other vehicles in the field, the taillights can be turned on to notify the existence and width of the own vehicle so that the vehicle can safely drive.

Further, in the second work traveling position, when the auxiliary work light is turned on together with the headlight and the main work light, the main work light and the auxiliary work light illuminate the front side of the vehicle together with the surroundings of the vehicle to make the work more efficient. Can be done In this case as well, if the taillight that informs the existence and width of the vehicle is turned off without being turned on, the power consumption due to the lighting of the taillight is reduced, the load on the alternator is reduced, and the battery is dead. Can be prevented.

Then, when the work vehicle travels on the road when the operating tool is switched to the working traveling position, when the headlight and the tail light are turned on and the working light is turned off, the operating tool is moved to the road traveling position. The work light can be turned off even if the switching is neglected, and it is possible to prevent the work light from causing trouble to other vehicles and the like.

Further, when the manual operation tool for adjusting the engine speed is operated at a low speed in preparation for the control unit, the headlight and the tail light are turned on as if the work vehicle is traveling on the road. When the light is turned off, the uncertainty such as what is considered to be traveling on the road due to the switching of the traveling transmission to the high speed position is eliminated, and the operating state of the manual operating tool that adjusts the engine speed is used. It is possible to determine whether the vehicle is traveling on the road or working, with a considerable probability, and the work light can be surely turned off by detecting the traveling on the road.

If the work vehicle is stopped for a long time with the work light turned on together with the headlight and taillight, if the engine speed is low at that time, the amount of power generated by the alternator will decrease and the battery will run out. It becomes a factor of. However, when the manual operation tool that adjusts the engine speed is operated at a low speed, the headlight and tail light are turned on and the work light is turned off even if the vehicle is not running on the road. It is possible to reduce the power consumption due to the lighting of the light and prevent the battery from running out.

Further, the meter panel provided in the control unit is provided with a monitor lamp that lights and displays that the operating tool has been switched to the work traveling position, and the monitor lamp is used when the work vehicle travels on the road. When the continuous lighting state is switched to the blinking state and a warning is given, the operation tool can be prompted to switch to the road traveling position, and the work light can be surely turned off to drive on the road.

It is a side view of the tractor to which this invention is applied. It is a perspective view of the tractor seen from the front side. It is a perspective view of the tractor seen from the rear side. It is a front view of the meter panel part provided in front of a driver's seat. It is a top view of the operation tool which adjusts the rotation speed of an engine. It is a block diagram of a light control device. It is a flowchart of lighting control.

Embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 3, the agricultural tractor 1 as a work vehicle constitutes a vehicle body (vehicle) by integrally connecting an engine 2, a clutch housing 3, a transmission case 4, and the like from the front. Further, near the front part of the vehicle body, a bonnet 5, a front grill 6 and a side cover 7 for covering the engine 2 and auxiliary equipment of the engine 2 are provided, and the bonnet 5 can be opened and closed on the front side via a hinge provided on the rear part. Configure to.

Further, the front bracket 8 fixed to the engine 2 and extending forward pivotally supports the front axle case 9 so as to swing left and right. Front axle cases (kingpin case and final case) are attached to the left and right ends of the front axle case 9. Further, the front axle case pivotally supports the front axle 11 to which the front wheels 10 are attached, and the steering wheel 12 provided in the steering portion steers the left and right front wheels 10 via the power steering unit.

On the other hand, rear axle cases connected to the left and right sides of the transmission case 4 are provided near the rear of the vehicle body, and the left and right rear wheels 14 are attached to the rear axle 13 pivotally supported by the rear axle case. In addition, a well-known three-point link mechanism consisting of a top link and left and right lower links 15 and a connecting device such as a drawbar are provided at the rear of the vehicle body, and these connecting devices include a rotary tiller, a ridger, or a seeder. A work machine such as a transplant machine is connected, and engine power is transmitted to the work machine from a PTO shaft (power take-off shaft) pivotally supported at the rear of the transmission case 4.

Further, a cabin 16 that covers the control portion via anti-vibration rubber is mounted on the vehicle body behind the engine 2. Here, the cabin 16 is between the front pillar 17 which is a pair of left and right front columns, the rear pillar 18 which is a pair of left and right rear columns, and the upper ends of the four columns 17 and 18 extending in the vertical direction. The cabin frame is composed of a square frame-shaped roof frame 19 for connecting and fixing the above, and a lower frame 20 for connecting and fixing between the lower ends of the columns 17 and 18.

The left and right door glasses 21 are attached to the cabin frame so as to be openable and closable via hinges 22 provided on the rear side, and the front glass 23 is provided on the front side and the rear glass 24 is provided on the rear side. Further, a fender 26 covering the front upper side of the rear wheel 14 is extended from the lower ends of the left and right rear pillars 18 toward the floor 25 side diagonally downward in the front direction. Further, an inner roof and an outer roof 27 are attached to the roof frame 19.

Further, the lower frame 20 is provided with a side console 28 and a seat undercover 30 for attaching an operation lever or the like provided from the vehicle body side, which is located between the left and right fenders 26. Further, a panel cover 32 and a rear panel cover 33 are provided at the center of the floor 25 near the front portion to cover the periphery of the steering column 31 which is erected from the vehicle body and inclined toward the driver's seat 29 side.

The panel cover 32 is provided with a meter panel 34 as shown in FIG. 4, an engine starter switch 35, an operation switch unit 36 for automatically controlling a tractor, a horn switch 37, and the like. 38 is a forward / backward advance lever, 39 is an engine control lever, 40 is a turn signal lever, 41 is a work equipment elevating lever, 42 is a main clutch pedal, and 43 is a left and right brake pedal.

Further, the left side console 28 is provided with a traveling main shift lever 44, an auxiliary shift lever 45, and a PTO shift lever 46, and the right side console 28 is provided with a position control lever for raising and lowering the work equipment, a volume related to automatic control, and the like. Is provided. Further, as shown in FIG. 5, a foot accelerator pedal 47 is provided on the right side of the floor 25.

A pedal potentiometer 48 and a lever potentiometer 49 for detecting the amount of depression of the foot accelerator pedal 47 and the amount of rotation of the engine control lever 39 are provided, and an electronic control device (not shown) is operated by any of these potentiometers 48 and 49. The larger amount is given to the engine EUC as a command value of the engine rotation speed, and the engine EUC controls the common rail type diesel engine 2 so as to match the given rotation speed.

Next, the lighting lighting provided in the work vehicle, which is a feature of the present invention, will be described. The front grille 6 is provided with left and right headlights (headlights) 50 and left and right auxiliary work lights (corner lights) 51. Of these, the left and right headlights 50 illuminate the front of the vehicle, and the left and right auxiliary work lights 51 illuminate the front right side and the front left side of the vehicle. In addition, main work lights (work lights) 52 are provided near the upper parts of the left and right front pillars 17 and rear pillars 18, respectively, and these four main work lights 52 illuminate the surroundings of the vehicle closer to the front left and right and to the rear left and right.

Further, tail lights 53 are provided near the lower parts of the left and right rear pillars 18, and the left and right tail lights 53 are lights for notifying the existence and width of the own vehicle and are also used as brake lamps. The left and right direction indicators (turn signal lamps) 54 are provided in the middle of the left and right rear pillars 18, and the left and right over fenders 55 below the tail lights 53 are reflectors 56 for notifying the existence of the own vehicle. Is provided.

On the other hand, the lighting switch 57 that controls the turning on and off of these lighting lights is incorporated in the lighting & turn signal switch assembly 58 provided with the cancel cam mechanism provided below the steering wheel 12 as shown in FIG. The lighting switch 57 can be switched by rotating the knob 59 provided at the tip of the lever 40 to four positions (P0 to P3).

That is, when the knob (single operating tool) 59 is turned clockwise one step at a time from the extinguishing position P0 that turns off all the lighting, the headlight 50 and the taillight 53 are turned on at the road traveling position P1 and the headlight. Turn the knob 59 counterclockwise to the first working running position P2 that at least lights the 50 and the auxiliary work light 51, and the second working running position P3 that at least turns on the headlight 50 and the main work light 52. When turned to, the light can be returned to the light-off position P0 in the reverse order of the above. The meter panel 34 is provided with a first monitor lamp 60 and a second monitor lamp 61 corresponding to the two working running positions of the lighting switch 57.

Further, the control device for controlling the lighting of the lighting using the above-mentioned lighting switch 57 will be described. As shown in FIG. 6, the lighting ECU 62 composed of the microcomputer unit connects the lighting switch 57 and the lever potentiometer 49 to the input circuit thereof. Further, the headlight 50, the auxiliary work light 51, the main work light 52, and the tail light 53 are connected to the output circuit including the relay.

Then, when the starter switch 35 of the engine 1 is turned on, the light ECU 62 executes the light control program shown in FIG. 7, first determines the switching state of the lighting switch 57 (S1), and is operated to the extinguished position by the knob 59. In that case, the first and second monitor lamps 60 and 61 are turned off (S2). Further, the headlight 50 and the taillight 53 are turned off (S3), the main work light 52 and the auxiliary work light 51 are turned off (S4), and all the lights are turned off to return.

Further, it is determined whether the lighting switch 57 is operated to the road traveling position by the knob 59 (S5), and when the lighting switch 57 is operated to the road traveling position, the first and second monitor lamps 60 and 61 are turned off (S6). ). Further, the headlight 50 and the taillight 53 are turned on (S7), the main work light 52 and the auxiliary work light 51 are turned off (S8), and only the headlight 50 and the taillight 53 are turned on to return.

Further, it is determined by the knob 59 whether the lighting switch 57 is operated to the working running position, that is, in this case, the first working running position or the second working running position (S9), and is operated to the working running position. In this case, it is determined whether the lever potentiometer 49 shows a low rotation speed in the engine speed (S10), and thereby it is determined whether the work running is actually performed or the road running is performed.

That is, the tractor 1 includes two means of adjusting the engine speed, an engine control lever (manual operation tool) 39 and a foot accelerator pedal (foot movement operation tool) 47, of which the engine control lever 39 is provided. Is provided near the right side of the steering wheel 12, and is attached with a slightly stronger friction, so that the adjusted engine speed is maintained even if the hand is released. Further, the foot accelerator pedal 47 is provided on the right side of the floor 25 because it is operated by the foot, and when the depression is stopped, the engine speed is restored and urged to the minimum rotation speed (low idle).

Then, the instruction of the actual engine speed is given to the engine ECU, whichever of the engine control lever 39 and the foot accelerator pedal 47 has the larger operation amount. Therefore, for example, when traveling on the road, the engine control lever 39 is used. After operating the engine so that the engine speed becomes the minimum speed (for example, the operation amount of the lever potentiometer 49 is 5% or less), the vehicle starts running on the road. Adjust the vehicle speed. Further, when it is desired to reduce the vehicle speed, the foot accelerator pedal 47 can be decelerated by stopping the depression.

On the other hand, when performing work driving, it is difficult to maintain the engine speed (constant speed operation) for a long time by operating the foot accelerator pedal 47 because the tractor 1 sways due to the unevenness of the field. Therefore, an engine control lever 39 that can keep the engine speed constant even when the tractor 1 is shaken is used. In this case, since the foot is separated from the foot accelerator pedal 47, the engine speed is instructed by the engine control lever 39. become.

Therefore, by determining whether the lever potentiometer 49 has a low engine speed, it is possible to determine whether the lever potentiometer 49 is in a state of actually performing work driving or a state of performing road traveling, and here the engine speed is determined. If is not instructed to rotate at a low speed, it is assumed that the work running is performed, and then it is determined whether the work running position is the first (S11).

Then, when the knob 59 is operated at the first work traveling position, the first monitor lamp 60 is turned on and the second monitor lamp 61 is turned off (S12). Further, the headlight 50 and the taillight 53 are turned on (S13), the main work light 52 is turned off and the auxiliary work light 51 is turned on (S14), and only the headlight 50, the taillight 53 and the auxiliary work light 51 are turned on. Turn it on.

Further, when the knob 59 is not operated at the first working running position, it is determined whether it is the second working running position (S15). Then, when the knob 59 is operated at the second working travel position, the first monitor lamp 60 is turned off and the second monitor lamp 61 is turned on (S16). Further, the headlight 50 is turned on and the taillight 53 is turned off (S17), the main work light 52 and the auxiliary work light 51 are turned on (S18), and the remaining three lights (with the headlight 50) except for the taillight 53. The main work light 52 and the auxiliary work light 51) are turned on.

However, if the engine speed is instructed to be low in step S10, it is assumed that the vehicle is running on the road, and then it is determined whether the engine speed is the first working running position (S19). Then, when the knob 59 is operated at the first work traveling position, the first monitor lamp 60 is blinked and the second monitor lamp 61 is turned off (S20). Further, when the knob 59 is not operated at the first working running position, it is determined whether the knob 59 is at the second working running position (S21), and when the knob 59 is operated at the second working running position, the knob 59 is operated. The first monitor lamp 60 is turned off and the second monitor lamp 61 is blinked (S22).

Then, after blinking the first monitor lamp 60 or the second monitor lamp 61 to warn that the knob 59 has not been returned to the road traveling position, the headlight 50 and the taillight 53 are turned on (S7). , The main work light 52 and the auxiliary work light 51 are turned off (S8), the work lights (main work light 52 and the auxiliary work light 51) are automatically turned off, and the headlight 50 and the tail light 53 are turned on when traveling on the road. Control the lighting of the lights.

The lighting control of the control device (lighting ECU 62) that controls the lighting is described above based on the flowchart. In summary, the tractor 1 as a work vehicle includes the headlight 50 that illuminates the front of the vehicle and the own vehicle. It is equipped with a taillight 53 that informs the existence and width of the vehicle, and work lights (main work light and auxiliary work light) 52 and 51 that illuminate the parts necessary for work, and these light lights are turned on below the steering wheel 12 of the control unit. A lighting switch 57 for turning off the lights and a knob (single operating tool) 59 for switching the lights are provided.

Then, the knob 59 for switching the lighting switch 57 can be switched to each position of turning off, running on the road, and working (first and second working running), and all the lights can be turned off at the turning off position. When the vehicle is switched to the road traveling position, the headlight 50 and the taillight 53 can be turned on. Further, when the work traveling position is switched, at least the headlight 50 and the work lights 52 and 51 can be turned on.

Since such a knob 59 is provided at the tip of the turn signal lever 40 that lights the direction indicator 54 provided below the steering wheel 12, it can be operated with one hand while operating the steering wheel 12. It is possible to improve the operability by collecting the lighting switches in one place as compared with the case where the individual lights are turned on and off by the lighting switches provided in various places.

Therefore, when traveling on the road at night, it is safe to turn on the headlight 50 and the taillight 53 that informs the existence and width of the own vehicle by switching the knob 59 of the lighting switch 57 provided in the control unit to the road traveling position. It is possible to drive on the road. Further, when the work running at night is performed, the headlight 50 and the work lights 52 and 51 can be turned on at least by switching the knob 59 to the working running position, and the work running can be performed efficiently.

Further, when the work running is finished and the road running is performed, the work lights 52 and 51 can be turned off by switching the knob 59 from the working running position to the road running position, and moreover, when the road running is finished and the vehicle is parked. When the knob 59 is switched to the off position in order to turn off the lit headlight 50, not only the headlight 50 but also all the lights including the work lights 52 and 51 are turned off. Therefore, the work lights 52 and 51 can be turned off without being conscious of turning them off, and the work lights 52 and 51 will not be turned on unless the knob 59 is switched to the work traveling position again. It is possible to eliminate the troublesome operation for turning off the 51 unexpectedly.

The work lights 52 and 51 illuminate the surroundings of the vehicle, and the presence and width of the own vehicle can be notified by lighting the work lights 52 and 51. In addition, it is extremely rare for pedestrians and other vehicles to enter the field during work driving. Therefore, when the knob 59 is switched to the work traveling position to turn on the headlight 50 and the work lights 52 and 51, the tail light 53 that informs the existence and width of the own vehicle is turned off without being turned on (see step S17). ), The power consumption due to the lighting of the taillight 53 can be reduced, the load on the alternator can be reduced, and the battery can be prevented from running out.

Further, the work lights 52 and 51 are composed of a main work light 52 that illuminates the surroundings of the vehicle and an auxiliary work light 51 that illuminates the front side of the vehicle, and the knob 59 at least lights the headlight 50 and the auxiliary work light 51. Since the work running position, the headlight 50 and the main work light 52 can be switched to the second working running position where at least the headlight 50 and the main work light 52 are turned on, the knob 59 is operated depending on the twilight or the work content, and the headlight 50 and It is possible to easily select a first work run for turning on the auxiliary work light 51 and a second work run for turning on at least the headlight 50 and the main work light 52.

Further, in the first work running position, when the taillight 53 is turned on together with the headlight 50 and the auxiliary work light 51 (see step S13), the taillight 53 that informs the existence and width of the own vehicle is turned on to turn on the vehicle. By illuminating the rear, for example, it is possible to check the ascending / descending state and the working state of the working machine connected to the rear. Further, when a pedestrian or another vehicle is in the field, the taillight 53 is turned on to notify the existence and width of the own vehicle so that the work can be safely carried out.

Further, in the second work traveling position, when the auxiliary work light 51 is turned on together with the headlight 50 and the main work light 52 (see step S18), the main work light 52 and the auxiliary work light 51 together with the surroundings of the vehicle are used. The work can be done efficiently by illuminating the front side of the. In this case as well, if the taillight 53 that informs the existence and width of the own vehicle is turned off without being turned on (see step S17), the power consumption due to the lighting of the taillight 53 is reduced and the load on the alternator is increased. Can be reduced and the battery can be prevented from running out.

Then, when traveling on the road when the knob 59 is switched to the work traveling position (see step S19 and subsequent steps), the lighting ECU 62 automatically turns on the headlight 50 and the taillight 53, and the work light 52, Since the 51 is turned off, the work lights 52 and 51 can be turned off even if the knob 59 is neglected to be switched to the road traveling position, and the lighting of the work lights 52 and 51 causes trouble to other vehicles and the like. Can be prevented.

Further, when the engine control lever (manual operating tool) 39 is operated at a low speed among the two operating tools of the engine control lever 39 and the foot accelerator pedal 47 for adjusting the engine rotation speed provided in the control unit. Assuming that the vehicle travels on the road, the headlight 50 and the taillight 53 are turned on and the work lights 52 and 51 are turned off. Therefore, for example, the traveling transmission is switched to the high speed position by the main shift lever 44 and the auxiliary shift lever 45. Along with this, it is necessary to eliminate uncertainties such as those considered to be driving on the road, and to judge whether the vehicle is traveling on the road or working with a considerable probability depending on the operating state of the engine control lever 39 that adjusts the engine rotation speed. By detecting the traveling on the road, the work lights 52 and 51 can be surely turned off.

If the tractor 1 is stopped for a long time with the work lights 52 and 51 turned on together with the headlight 50 and the tail light 53, the amount of power generated by the alternator if the engine 2 rotates at a low speed at that time. Will decrease and cause the battery to run down. However, when the engine control lever 39 for adjusting the rotation speed of the engine 2 is operated at a low rotation speed, the headlight 50 and the taillight 53 are turned on even if the engine control lever 39 is not driven on the road, and the work light 52, Since the 51 is turned off (see step S19 and subsequent steps), the power consumption due to the lighting of the work lights 52 and 51 can be reduced and the battery can be prevented from running out.

Further, the meter panel 34 provided in the control unit is provided with monitor lamps 60 and 61 for illuminating and displaying that the knob 59 has been switched to the working traveling position, and this monitor is provided when the tractor 1 travels on the road. Since the lamps 60 and 61 are switched from the continuously lit state to the blinking state to warn (see steps S20 and 22), the knob 59 is urged to switch to the road traveling position, and the work lights 52 and 51 are surely turned off on the road. Can run.

In the above-described embodiment, the engine control lever 39 is used as the manual operating tool for adjusting the engine speed. However, for example, a manual operating tool for adjusting the engine speed by rotating the dial may be used. Further, a large-capacity battery or a high-performance alternator may be used, and the headlight 50 and the taillight 53 may be turned on at the same time as the work lights 52 and 51 are turned on if there is no need to worry about the battery running out.

Further, when the auxiliary work light 51 is used as a cornering light that automatically turns on or off depending on the steering angle of the front wheel 10 to illuminate the traveling direction, it may be turned on when traveling on the road if there is no legal problem. If the work lights 52 and 51 are lit to illuminate the rear of the vehicle during work driving and the running condition of the own vehicle is clear, the brake lamp is turned on the road when the brake pedal is stepped on to brake the vehicle. It is also possible to reduce the battery exhaustion by turning off the lights instead of turning them on as in the case of running.

Then, when the engine control lever 39 is operated at a low rotation speed, the headlight 50 and the taillight 53 are turned on and the work lights 52 and 51 are turned off, assuming that the vehicle travels on the road. When traveling, it may be desired to turn on the auxiliary work light 51 to illuminate the front side of the vehicle while traveling. In such a case, the main work light 52 may be turned off so that the auxiliary work light 51 is not turned off. However, the present invention is not necessarily limited to the above embodiment.

1 tractor (work vehicle)
12 Steering wheel 29 Driver's seat 34 Meter panel 39 Engine control lever (manual control tool for adjusting engine speed)
40 Turn signal lever 47 Foot accelerator pedal 49 Lever potentiometer 50 Headlight
51 Auxiliary work light (corner light)
52 Main work light (work light)
53 Tail light
57 Lighting switch 59 Knob (single operating tool)
60 1st monitor lamp 61 2nd monitor lamp 62 Lighting ECU

Claims (7)

A headlight that illuminates the front of the vehicle, a taillight that indicates the presence and width of the vehicle, and a work light that illuminates the parts necessary for work, and a lighting switch that turns on and off these light lights is installed in the control unit. In the vehicle, the lighting switch provided on the control unit is turned off at a single operating tool to turn off all of these lights, the headlight and the trailing position at which the taillight that informs the presence and width of the vehicle is turned on, and the front. A work vehicle characterized in that it can be switched to a work traveling position in which at least the illumination light and the work light are turned on. The work light is composed of a main work light that illuminates the surroundings of the vehicle and an auxiliary work light that illuminates the front side of the vehicle, and at least the headlight and the auxiliary work light are turned on by the operating tool. The work vehicle according to claim 1, wherein the work vehicle is configured to be switchable to a second work travel position in which the illumination light and the main work light are at least turned on. The work vehicle according to claim 2, wherein the tail light is turned on together with the headlight and the auxiliary work light at the first work running position. The work vehicle according to claim 2 or 3, wherein the auxiliary work light is turned on together with the headlight and the main work light at the second work travel position. Claims 1 to 1, wherein when the work vehicle travels on the road when the operating tool is switched to the work traveling position, the headlight and the tail light are turned on and the work light is turned off. The work vehicle according to any one of 4. When the manual operation tool that adjusts the engine speed is operated at a low speed in preparation for the control unit, the headlight and taillight are turned on and the work light is turned on, assuming that the work vehicle is traveling on the road. The work vehicle according to claim 5, wherein the light is turned off. The meter panel provided in the control unit is provided with a monitor lamp that lights and displays that the operating tool has been switched to the work traveling position, and the monitor lamp is continuously lit when the work vehicle travels on the road. The work vehicle according to any one of claims 1 to 6, wherein a warning is given by switching from a state to a blinking state.

Images