JP4300096B2 - Work vehicle - Google Patents

Description

  The present invention relates to a work vehicle including a working device that operates by taking out a rotational driving force of an engine on a vehicle body that can run with the engine.

  Work vehicles for construction work etc. are generally equipped with work devices such as booms and work tables for working at high places on the body of a vehicle that can run, so that the body does not become unstable when working at high places. After the jack device is extended downward and the vehicle body is lifted and supported, an operator who rides on the work table can operate the boom or the like to move the work table to a desired or arbitrary work position. Yes.

  In addition, the operation of the working device of such a work vehicle is an operation in which the rotational driving force of the vehicle traveling engine mounted on the vehicle body is taken out by a PTO (power take-off) mechanism, the hydraulic pump is driven, and the hydraulic pump is discharged. Some of them are configured to operate by operating a hydraulic cylinder, a hydraulic motor, or the like provided in the work device by the oil pressure of the oil. This PTO mechanism can be switched on and off by, for example, a PTO switch disposed in a driving cabin of a work vehicle, and the PTO switch is turned on (on the side where the working device is operated and put into a working state). ) To change the power to the PTO mechanism, the engine is controlled by operating the accelerator pedal provided on the driving cabin or the accelerator lever provided on the workbench. It is possible to operate a working device such as a boom by controlling the rotational drive and performing supply / discharge control of hydraulic oil discharged from the hydraulic pump in accordance with the operation of the operating device provided on the work table.

  By the way, recently, when moving such a work vehicle to the work site, a headlamp provided on the vehicle body from the viewpoint of safety of traffic such that other traveling vehicles recognize the approach of the work vehicle early. There are many opportunities to drive the car not only at night and when the weather is irregular, but also during the daytime when the weather is good.

  After the work vehicle arrives at the work site, the PTO switch is switched to the ON side to bring the PTO mechanism into the power take-out state, and the hydraulic pump is driven by the rotational driving force of the engine. For example, the operator can control the hydraulic oil discharged from the hydraulic pump by operating an operation lever provided on the workbench to move the boom up, down, swivel, and extend, so that the workbench at the tip of the boom is desired or Move to any work position. Then, after moving the work bench to the desired work position, an engine start / stop switch provided on the work bench must be operated by an operator on the work bench in order to prevent noise generated from the engine. During work, the engine of the work vehicle is often stopped.

  By the way, even when the engine is stopped by the engine start / stop switch provided on the workbench, the headlamp is still on, and the headlamp is not turned off when it arrives at the work site (I forgot to turn it off) When the work table is moved to the work position and the engine start / stop switch is operated to stop the engine, and the engine is stopped and the work position is operated for a long time, There has been a problem that the battery is consumed due to the lighting of the headlamp, and the so-called battery rises.

  In view of the above problems, an object of the present invention is to provide a work vehicle provided with a control circuit for preventing a battery provided in the work vehicle from rising during work.

  In order to solve the above problems, a work vehicle according to the present invention includes a vehicle that can travel using the driving force of the engine (for example, the working vehicle 1 in the embodiment), and a power take-off mechanism that can extract the driving force of the engine ( For example, a PTO mechanism 15) in the embodiment, a working device (for example, the boom 5 in the embodiment) that is arranged on the vehicle body of the vehicle and operates using a driving force taken out by the power take-off mechanism, and a power take-off mechanism Power take-off actuating means (for example, the PTO operation lever 13 in the embodiment) for performing an on / off operation, and a headlamp (for example, the light 9 in the embodiment) that is attached to the vehicle and can be turned on or off. Have. On that basis, the power take-off detection means for detecting that the power take-off mechanism is turned on (for example, the PTO switch detection relay 33 in the embodiment) and the power take-off detection means detect the on action of the power take-off action means. And it has alarm means (for example, alarm buzzer 17 in an embodiment) which performs an alarm operation when the headlamp is on.

  In order to solve the above problems, a work vehicle according to the present invention includes a vehicle that can travel using the driving force of the engine (for example, the working vehicle 1 in the embodiment), and a power take-off that can extract the driving force of the engine. A mechanism (for example, the PTO mechanism 15 in the embodiment), a working device (for example, the boom 5 in the embodiment) that is disposed on the vehicle body of the vehicle and operates using the driving force that is taken out by the power take-off mechanism, and the power take-off Power take-off actuating means (for example, the PTO operation lever 13 in the embodiment) that operates to turn the mechanism on and off, and a headlamp that is attached to the vehicle and can be turned on or off (for example, the light 9 in the embodiment) And have. On that basis, the power take-off detection means that detects that the power take-off mechanism is turned on (for example, the PTO switch detection relay 33 in the embodiment) and the power take-off detection means detect that the power take-off operation means is turned on. It may be configured to have a control device (for example, the controller 30 in the embodiment) that restricts lighting of the headlamp when the headlamp is on.

  Furthermore, in order to solve the above problems, a work vehicle according to the present invention includes a vehicle that can travel using the driving force of the engine (for example, the working vehicle 1 in the embodiment), and a power take-off that can extract the driving force of the engine. A mechanism (for example, the PTO mechanism 15 in the embodiment), a working device (for example, the boom 5 in the embodiment) that is disposed on the vehicle body of the vehicle and operates using the driving force that is taken out by the power take-off mechanism, and the power take-off Power take-off actuating means (for example, PTO operation switch 16 in the embodiment) that performs an operation for turning on / off the mechanism, and a headlamp that is attached to the vehicle and can be turned on or off (for example, light 9 in the embodiment) And have. In addition, a control device (for example, the controller 30 in the embodiment) that restricts the on operation of the power take-off mechanism by the power take-off operation means when the headlamp is lit may be configured.

  According to the work vehicle related to the present invention, for example, after moving the vehicle while turning on the light and arriving at the work site, the light is turned on (including forgetting to turn off the light) and the work device such as a boom. When the PTO operation lever is operated to turn on to operate the PTO mechanism, the alarm device is activated based on detection of the operation of the PTO operation lever to the on operation side by the PTO switch detection relay. Operate. For this reason, the warning operation of the warning device can alert the worker, and when the worker tries to operate the work device to perform work, the worker turns off the light, so the engine is stopped. When working for a long time, it is possible to prevent a so-called battery from rising.

  Further, according to the present invention, according to the work vehicle having the control device for restricting the lighting of the headlamp when the operation to the on-operation side of the power take-off operation unit is detected by the power take-off detection unit, For example, after the vehicle travels and moves to the work site while the light is on, the PTO mechanism is operated by operating the PTO operation lever to the on side to operate the work device such as the boom while the light is on. When activated, the supply of power from the battery to the light is cut off based on the detection of the operation of the PTO operation lever to the on-operation side by the PTO switch detection relay, and the light is turned off. For this reason, the light cannot be turned on during the work, and when the work is performed for a long time with the engine stopped, the so-called battery can be prevented from rising.

  Furthermore, according to the present invention, when the headlamp is lit, according to the work vehicle having the control device that regulates the on-operation of the power take-off mechanism by the power take-off actuating means, for example, the vehicle while turning on the light When the PTO operation switch is turned on to operate a work device such as a boom with the light turned on, the light operation switch by the light switch detection relay The supply of power from the battery to the PTO mechanism is cut off based on the detection of the operation to the on-operation side. For this reason, even if the PTO operation switch is operated to the ON side, power from the battery is not supplied to the PTO mechanism, and the PTO mechanism does not operate. Therefore, since the work device such as the boom cannot be operated and the work cannot be performed in the state where the light is turned on, it is possible to prevent the so-called battery from being raised.

  Hereinafter, a preferred embodiment of a work vehicle according to the present invention will be described with reference to FIGS. FIG. 1 shows an example of a work vehicle according to the present invention. The work vehicle 1 can travel with front and rear wheels 3 a and 3 b on the front, rear, left and right sides of the vehicle body 2, and is constructed based on a truck vehicle having a driving cabin 2 a at the front of the vehicle body 2. On the vehicle body 2 of the truck vehicle, there is disposed a turntable 4 that is driven by a turn motor 51 and configured to be able to turn horizontally. The base 5 is pivotally connected to the swivel 4 and a boom 5 is attached. The boom 5 is moved up and down by a hoisting cylinder 52. The boom 5 includes a base boom 5a, an intermediate boom 5b, and a tip boom 5c in a nested manner, and a built-in telescopic cylinder 53 (hereinafter referred to as a swing motor 51, a hoisting cylinder 52, and a telescopic cylinder 53 are combined to form a “boom actuator 55”. )), The entire boom 5 is configured to be movable in the longitudinal direction.

  The vertical post member 6 is pivotally attached to the tip boom 5c so as to be swingable up and down. The vertical post member 6 is controlled by swinging the vertical post member 6 by a leveling cylinder (not shown) disposed between the tip of the tip boom 5 c and the vertical post member 6, regardless of whether the boom 5 is raised or lowered. The vertical post member 6 is controlled to swing so that the vertical post member 6 always extends vertically. The work table 7 is attached to the vertical post member 6 that is always held vertically in such a manner that it can be swiveled horizontally (swinged freely) by a swiveling motor (not shown). Retained.

  The vehicle body 2 is provided with jacks 8 that are widened outwardly in the left-right direction and retractable below the vehicle body 2 at four locations on the front, rear, left, and right sides of the vehicle body 2. The vehicle body 2 can be stably lifted and supported by widening left and right and extending downward and extending. Further, a light 9 (headlight) is provided at the front end of the vehicle body 2 so that the work vehicle 1 can be traveled and moved safely in the daytime so that the vehicle can run when the forward visibility is poor, such as at night. It is attached. The light 9 is turned on and off by performing an on / off switching operation of the light operation switch 14 provided in the driving cabin 2a. Furthermore, a PTO operation lever 13 that can be switched on and off is attached to the driving cabin 2a. With this PTO operation lever 13, an on / off operation switching operation of a PTO mechanism 15 described later can be performed. Is possible.

  A lower operation device 12 for operating the boom 5 or the like or the operation of the jack 8 is attached to the rear end of the vehicle body 2, and an upper operation device 11 for operating the operation of the boom 5 or the like is attached to the work table 7. It is attached. For this reason, the operator boarding the work table 7 operates the upper operation device 11 to cause the boom 5 to move up and down, to extend and retract, and to turn the swivel table 4 so that the work table 7 is at a desired or arbitrary height. It can be moved to a position, and a worker on the ground can perform the same operation using the lower operation device 12. Further, when working at a high place, the operator can operate the jack operation switch provided in the lower operation device 12 to extend and ground the jack 8 to stably support the vehicle body 2.

  With reference to FIG. 2, in the work vehicle 1 configured as described above, the operation of the telescopic cylinders and the like provided in the boom actuator 55 and the jack 8 is specifically the hydraulic pressure of the hydraulic oil discharged from the hydraulic pump P. It is done using. The vehicle body 2 has a tank for storing the hydraulic oil, a hydraulic pump P that sucks the hydraulic oil in the tank and discharges the hydraulic oil of a predetermined hydraulic pressure and amount, a supply direction and supply amount of the hydraulic oil discharged from the hydraulic pump P. A hydraulic unit 50 including an electromagnetic proportional valve to be controlled is provided, and the controller 30 is provided with a swing motor 51, a hoisting cylinder 52, and an expansion / contraction provided in the hydraulic unit 50 based on operation signals from the operation devices 11 and 12. By controlling the operation direction and valve opening degree of the electromagnetic proportional valve respectively corresponding to the cylinder 53 and the like, the operation of the boom actuator 55 and the like, that is, the operation of the boom 5 and the jack 8 and the like are controlled.

  In the work vehicle 1, the driving force of the engine ENG is used as a power source for rotating the hydraulic pump P, and this driving force is extracted and used by a power take-off mechanism (hereinafter referred to as “PTO mechanism”). FIG. 3 shows the power transmission mechanism of the work vehicle 1 as a block diagram. Hereinafter, the power transmission mechanism of the work vehicle 1 will be described with reference to FIG.

  The accelerator pedal 21 provided in the driving cabin 2a is equipped with a potentiometer 21a (wire reel type variable resistor), and the potentiometer 21a outputs an accelerator signal corresponding to the depression amount of the accelerator pedal 21 to the controller 30. The engine ENG throttle opening control and fuel supply control are performed to change the rotational speed of the engine ENG. Then, the driving force of the engine ENG is transmitted to the traveling device 40 (rear wheel 3b, etc.) via the transmission TM to cause the vehicle body 2 to travel, and when the working device such as the boom 5 is operated, the driving force of the engine ENG is described later. It is also transmitted to the hydraulic unit 50 through the PTO mechanism 15 that performs the above operation.

  The driving force of the engine ENG is transmitted to the propeller shaft PS via a clutch (not shown) in the transmission TM, and further transmitted to the left and right rear wheels 3b via a differential mechanism (not shown) and left and right drive shafts (not shown). Let it run. The transmission TM is a so-called manual transmission, and can be set to each speed stage such as neutral (neutral state), low, second, reverse, etc. by depressing the clutch pedal in the driving cabin 2a and operating the shift lever 16.

  Further, the engine ENG is provided with a PTO mechanism 15 for transmitting the driving force of the engine ENG to the hydraulic unit 50 so that the driving force of the engine ENG can be taken out or disconnected. For example, an electromagnetic clutch 15a is built in the PTO mechanism 15, and the driving force of the engine ENG is increased by operating the PTO operation lever 13 provided in the operation cabin 2a and capable of switching on and off to engage the electromagnetic clutch. The hydraulic unit 50 is configured to be transmitted. As will be described later, a PTO operation switch 16 is provided in the driving cabin 2a instead of the PTO operation lever 13, and the PTO mechanism 15 is turned on and off based on an operation signal output from the PTO operation switch 16. You may comprise so that it may be performed.

First embodiment

  Here, a first embodiment of the work vehicle according to the present invention will be described. FIG. 4 shows a schematic configuration of a control circuit 90 provided in the work vehicle according to the present invention for preventing battery soaking as a block wiring diagram, which will be described below with reference to this figure.

  As shown in the figure, when the light operation switch 14 is in the ON position, the control circuit 90 closes the switch contact based on the operation signal from the light operation switch 14 (turns on), the PTO operation. When the lever 13 is in the ON position, the switch contact is closed based on the operation signal from the PTO operation lever 13 (ON operation is performed), and the relay when the switch contact of the PTO switch 32 is closed. A PTO switch detection relay 33 that detects the closed state of the switch contact of the PTO switch 32 when power is supplied to the coil R, a changeover switch 34 that is closed when power is supplied to the relay coil R, and a switch of the light switch 31 An alarm buzzer 17 that operates when the contact is closed and the changeover switch 34 is closed; As shown in beauty view and the like wiring line connecting between these devices. The negative electrode side of the battery B is connected to the vehicle body chassis to form a ground, and the negative electrode side of each device is connected to the vehicle body chassis to form a negative electrode side wiring line.

  Electric power from the battery B is connected to an engine start / stop switch 23 provided in the upper operating device 11 in the work table 7 via a line 61, and an engine start terminal (ST) of the switch 23 is connected to the line 62 or the like. Is connected to the positive side of a starter motor 81 for starting the engine ENG. The negative electrode side of the starter motor 81 is connected to the vehicle body chassis via a line 63 and is connected to the negative electrode side of the battery B. The engine start / stop switch 23 provided in the upper operating device 11 is configured to have a plurality of terminals including start (ST), operation (IG), and stop (OFF) of the engine ENG.

  A line 64 branched from the line 61 is connected to one end of the switch terminal of the light switch 31. The other end of the switch terminal of the light switch 31 is connected to the vehicle body chassis, that is, the negative electrode side of the battery B via the line 65 and the line 66. Further, the line 67 branches from the line 65 and is connected to one end of the changeover switch 34, and the other end of the changeover switch 34 is connected to the alarm buzzer 17 via the line 68. The alarm buzzer 17 is supplied with power from the battery B when the switch contact of the light switch 31 is closed and the changeover switch 34 is closed (power is supplied to the relay coil R). The alarm is activated.

  On the other hand, the electric power from the battery B is also connected to the switch terminal of the PTO switch 32 via the line 69, and is connected to the relay coil R of the PTO switch detection relay 33 via the line 71 from the other end of the switch terminal of the PTO switch 32. Connected. A line 72 extends from the relay coil R and is connected to the vehicle body chassis, that is, the negative electrode side of the battery B.

  In the work vehicle 1 equipped with the control circuit 90 configured as described above, when the vehicle is driven while the light 9 is turned on by operating the light operation switch 14 to the on position side, the switch contact of the light switch 31 is Closed. At this time, if the PTO operation lever 13 is in the off-side position, the switch contact of the PTO switch 32 is open. Therefore, no current flows through the lines 71 to 72 of the relay coil R in the PTO switch detection relay 33, and the changeover switch 34 is held open. For this reason, even when the switch contact of the light switch 31 is in the closed state, no current flows through the lines 67 to 68, and the power from the battery B is not supplied to the alarm buzzer 17, so that the alarm buzzer 17 does not perform an alarm operation.

  On the other hand, after arriving at the desired work site, if the light 9 is still lit and the PTO operating lever 13 is turned on to operate the boom 5 or the like and the PTO mechanism 15 is operated, the PTO switch The 32 switch contacts are closed, and a current flows through the lines 71 to 72 of the relay coil R in the PTO switch detection relay 33. For this reason, since the changeover switch 34 is closed and a current flows through the lines 67 to 68, the power from the battery B is supplied to the alarm buzzer 17, the alarm buzzer 17 is activated, and the operator is alerted. .

  However, in the above state, when the operator operates the light operation switch 14 to the off side to turn off the light 9, the switch contact of the light switch 31 is opened, so that a current flows through the lines 64 to 65. In addition, since the electric power from the battery B is not supplied to the alarm buzzer 17, the alarm buzzer 17 does not operate. FIG. 5 shows the relationship between the on / off operation state of the light switch 31 and the PTO switch 32 and the alarm operation of the alarm buzzer 17. As shown in the figure, the alarm buzzer 17 is activated when both the light switch 31 and the PTO switch 32 are turned on.

  Further, after the PTO operating lever 13 is operated to the on side to activate the PTO mechanism 15 and the boom 5 and the like are moved up and down to move the work table 7 to a desired or arbitrary high position, the work table After the engine ENG is stopped by operating the engine start / stop switch 23 of the upper operating device 11 provided in 7, work at a high place is started. At this time, the light 9 remains off.

  As described above, when the work device such as the boom 5 is operated at the work site to perform the work at a high place, the operator operates the light operation switch 14 to the off side and turns off the light 9 to turn off the PTO. Even if the operation lever 13 is operated to the on side, the alarm buzzer 17 does not operate, and it is possible to prevent the battery B from being raised by performing the work while the light EN9 is stopped and the engine ENG is stopped for a long time. it can.

Second embodiment

  Although the preferred embodiments of the present invention have been described so far, the scope of the present invention is not limited to the above-described embodiments. Here, a second embodiment using a control circuit equipped in a work vehicle according to the present invention will be described with reference to FIG. As shown in the figure, the basic configuration of the block wiring diagram of the control circuit 90 in this embodiment is substantially the same as that of the first embodiment, but the PTO switch detection relay 33 is connected to a line 73 extending from the switch contact of the light switch 31. The switch contacts are connected. The switch contact of the PTO switch detection relay 33 is configured to be opened when the switch contact of the PTO switch 32 is closed and power is supplied to the relay coil R.

  In addition, a light 9 (headlight) that illuminates the front of the vehicle is disposed in the lines 74 to 75, and the light operation switch 14 is turned on to close the switch contact of the light switch 31. Above, if the switch contact of the PTO switch detection relay 33 is in the closed state, the power from the battery B is supplied to the light 9 and the light 9 can be turned on.

  According to the control circuit having such a circuit configuration, the boom 5 is turned on while the light 9 is turned on after the vehicle travels and arrives at the work site while the light 9 is turned on with the light operation switch 14 turned on. When the switch contact of the PTO switch 32 is closed by operating the PTO operation lever 13 to turn on the working device such as the above, the current flows through the lines 69 to 71, so that the PTO switch detection relay 33 A current flows through the relay coil R. For this reason, the switch contact of the PTO switch detection relay 33 is opened, the line 73 and the line 74 are disconnected, the power from the battery B is not supplied to the light 9, and the light 9 is turned off.

  At this time, when the PTO operation lever 13 is operated to the OFF side to open the PTO switch 32 and the lines 69 to 71 are cut off, no current flows through the relay coil R, and the lines 73 to 74 are conducted. For this reason, the light 9 can be turned on by operating the light operation switch 14 to the ON side.

Third embodiment

  Further, a third embodiment using a control circuit provided in the work vehicle according to the present invention will be described with reference to FIG. As shown in the figure, the basic configuration of the block wiring diagram of the control circuit 90 in this embodiment is substantially the same as that of the second embodiment, but a light switch detection relay 34 is provided instead of the PTO switch detection relay 33. ing. One end of the switch contact of the light switch detection relay 34 is connected to a line 76 extending from the switch contact of the PTO switch 32, and the other end is connected to a line 77. The line 77 is connected to the PTO mechanism 15. . The relay coil R of the light switch detection relay 34 is provided between a line 78 extending from the switch contact of the light switch 31 and a line 79 extending to the light 9. Further, as a power take-off operating means for operating the PTO mechanism 15, a PTO operation switch 16 that can be turned on / off is provided instead of the PTO operation lever 13, and based on an operation signal from the PTO operation switch 16. Then, the PTO switch 15 is opened and closed, and the PTO mechanism 15 is operated by supplying power from the battery B to the PTO mechanism 15.

  The light switch detection relay 34 is configured such that when the switch contact of the light switch 31 is closed and power is supplied to the relay coil R, the switch contact of the light switch detection relay 34 is opened. . For this reason, if the light operation switch 14 is operated to the ON side, the lines 76 to 77 can be blocked.

  According to the control circuit having such a circuit configuration, the boom 5 is turned on while the light 9 is turned on after the vehicle travels and arrives at the work site while the light 9 is turned on with the light operation switch 14 turned on. When the PTO operation switch 16 is operated to the on side in order to operate the working device such as the above, a current flows through the lines 78 to 79 of the relay coil R in the light switch detection relay 34. For this reason, the switch contact of the light switch detection relay 34 is in an open state, the line 76 and the line 77 are disconnected, and even if the switch contact of the PTO switch 32 is in the closed state, the PTO mechanism 15 has no power from the battery B. Is not supplied, and the PTO mechanism 15 does not operate.

  At this time, if the light operation switch 14 is operated to the off side to turn off the light 9 and open the light switch 31 to cut off the lines 64 to 78, a current flows through the relay coil R of the light switch detection relay 34. The switch contacts of the light switch detection relay 34 are activated and the lines 76-77 are conducted. For this reason, the PTO mechanism 15 can be operated by operating the PTO operation switch 16 to the ON side.

In the work vehicle which concerns on this invention, (a) is the top view, (b) is the side view. It is a block diagram which shows the operation control in the work vehicle which concerns on this invention. It is a block diagram which shows the power transmission mechanism of the engine in the working vehicle which concerns on this invention. It is a block wiring diagram which shows the structure of the control circuit provided in the said work vehicle. It is a graph which shows the alarm action | operation of the alarm means provided in the said work vehicle. It is a block wiring diagram which shows the structure of the control circuit in 2nd Embodiment of the said working vehicle. It is a block wiring diagram which shows the structure of the control circuit in 3rd Embodiment of the said working vehicle.

Explanation of symbols

1 Work vehicle (vehicle)
4 swivel (working device)
5 Boom (Working device)
5a Base boom (working device)
5b Intermediate boom (working device)
5c Tip boom (working device)
9 Light (headlight)
13 PTO control lever (Power take-off actuating means)
15 PTO mechanism (power take-off mechanism)
16 PTO operation switch (Power take-off operation means)
17 Alarm buzzer (alarm means)
30 controller (control device)
33 PTO switch detection relay (power take-off detection means)
ENG engine

Claims (3)

A vehicle that can run using the driving force of the engine, a power take-off mechanism that can extract the driving force of the engine, and a driving force that is disposed on the vehicle body of the vehicle and is extracted by the power take-off mechanism A work vehicle, a power take-off actuating means for operating the power take-off mechanism to be turned on and off, and a headlamp that is attached to the vehicle and can be turned on or off,
Power take-off detection means for detecting that the power take-off mechanism is turned on;
A work vehicle comprising: an alarm unit that performs an alarm operation when the power take-off detection unit detects an ON operation of the power take-off operation unit and the headlamp is lit. A vehicle that can run using the driving force of the engine, a power take-off mechanism that can extract the driving force of the engine, and a driving force that is disposed on the vehicle body of the vehicle and is extracted by the power take-off mechanism A work vehicle, a power take-off actuating means for operating the power take-off mechanism to be turned on and off, and a headlamp that is attached to the vehicle and can be turned on or off,
Power take-off detection means for detecting that the power take-off mechanism is turned on;
A work vehicle comprising: a control device that regulates lighting of the headlamp when the power take-off detecting means detects the on-operation of the power take-off operating means. A vehicle that can run using the driving force of the engine, a power take-off mechanism that can extract the driving force of the engine, and a driving force that is disposed on the vehicle body of the vehicle and is extracted by the power take-off mechanism A work vehicle, a power take-off actuating means for operating the power take-off mechanism to be turned on and off, and a headlamp that is attached to the vehicle and can be turned on or off,
A work vehicle comprising: a control device that regulates on-operation of the power take-off mechanism by the power take-off operation means when the headlamp is lit.

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