JP6782158B2 - Work vehicle - Google Patents

Description

The present invention relates to a work vehicle in which a prime mover is started by inserting a start key into a key cylinder and rotating the key cylinder, and traveling or the like is driven by power from the prime mover.

As an example of such a work vehicle, a traveling body having left and right crawler mechanisms, a rotating body provided on the traveling body so as to be able to turn, and an excavator provided in the front part of the turning body for excavation work and the like. There is a power shovel configured with a device. The power excavator includes an engine and a hydraulic pump driven by the engine, and uses hydraulic oil discharged from the hydraulic pump to drive the traveling hydraulic motors of the left and right crawler mechanisms, the hydraulic cylinders of the excavator device, etc. It is configured to perform excavation work and the like (see, for example, Patent Document 1). There is also a power shovel that is equipped with a battery and an electric motor instead of the engine and is configured to drive the hydraulic pump by the electric motor. In such a power shovel, an operator cabin that forms an operation chamber is provided in the swivel body, and a start key is inserted into a key cylinder provided in the operator cabin to rotate the engine or the like to the ON side. It is configured to be able to start the prime mover of.

Japanese Unexamined Patent Publication No. 2016-53375

Conventionally, in work vehicles such as power shovels, the same type of model often has a common start key, and it has become possible to start a plurality of work vehicles by using one start key. Therefore, the work vehicle may be damaged by theft, and anti-theft measures are required. As one of the countermeasure technologies, there is one that uses GPS (Global Positioning System) so that the location of the work vehicle can be grasped via GPS and the prime mover circuit of the work vehicle cannot be cut off to start. There is a technology to regulate in. However, such a technology using GPS was after the victim of the theft, and did not prevent the theft.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a work vehicle capable of preventing theft.

In order to achieve the above object, the work vehicle according to the present invention has a prime mover (for example, the engine in the embodiment) and is capable of traveling by power from the prime mover (for example, the traveling body 10 and the turning in the embodiment). A body 20), a work device provided in the vehicle (for example, a shovel device 30 in the embodiment), and an operator cabin provided in the vehicle and forming an operation chamber are provided in the operator cabin. The prime mover can be started by inserting the start key into the key cylinder and rotating the engine from the off position, which is the insertion position, to the start position via the on position . Then, when the start key is inserted into the key cylinder and is rotated from the off position to the on position, the key authentication controller determines whether or not the inserted start key is registered in advance. A first warning device (for example, a buzzer device 111 in the embodiment) provided in the operator cabin and generating a warning sound in the operator cabin, and a warning sound provided in the vehicle and generating a warning sound around the vehicle. A second warning device (for example, the horn device 28 in the embodiment) is provided. Then, when it is determined by the key authentication controller that the start key inserted into the key cylinder and rotated from the off position to the on position is unregistered, the first warning device in the operator cabin When the start key is rotated from the on position to the start position, the second warning device is configured to generate a warning sound around the vehicle.

Then, when the unregistered start key is rotated from the off position to the on position and the warning sound is generated by the first warning device, the work vehicle having the above configuration is unregistered. When the operation of returning the start key to the off position side is performed, the generation of the warning sound by the first warning device is stopped, and the warning sound is not generated by the second warning device.

In the work vehicle having the above configuration, a display device provided in the operator cabin and displaying a warning in the operator cabin is provided, and the start key inserted into the key cylinder by the key authentication controller is unregistered. If it is determined to be present, it is preferable that the first warning device generates a warning sound and the display device displays a warning in the operator cabin.

In the work vehicle having the above configuration, when the key authentication controller determines that the start key inserted into the key cylinder is unregistered, the prime mover is regulated so as not to start. Is preferable.

According to the work vehicle according to the present invention, the key authentication controller determines whether or not the start key inserted in the key cylinder is pre-registered, and if it is determined that the start key is an unregistered key, the first warning is given. The device is configured to generate a warning sound in the operator cabin, and the second warning device is configured to generate a warning sound around the vehicle when the rotation operation of the start key is repeated a predetermined number of times. Therefore, when an attempt is made to steal a vehicle using an unregistered key, not only the first warning device generates a warning sound in the operator cabin, but the second warning device also generates a warning sound around the vehicle. be able to. Therefore, it is possible to notify the surroundings of the vehicle that the vehicle is in a state of being stolen, thereby preventing the theft.

In the present invention, when it is determined that the key is unregistered and a warning sound is generated by the first warning device, if an operation of returning the unregistered key to the OFF side is performed, the warning sound of the first warning device is emitted. It is preferable that the generation is stopped and the warning sound is not generated by the second warning device. According to such a configuration, even if the operator mistakenly uses the unregistered key, the first warning device only informs the operator that the key is an unregistered key, and the second warning device around the vehicle. It is possible to avoid a situation in which a warning sound is generated to attract the attention of the surroundings.

In the present invention, when it is determined that the key is not registered, it is preferable that the first warning device generates a warning sound and the display device displays a warning in the operator cabin. According to such a configuration, it is possible to reliably notify in the operator cabin that the unregistered key is being used by the warning sound by the first warning device and the warning display by the display device.

In the present invention, it is preferable that the prime mover is regulated so as not to start when it is determined that the key is an unregistered key. According to such a configuration, theft using the unregistered key can be reliably prevented.

It is a perspective view of the power shovel which is an example of the work vehicle which concerns on this invention. It is a block diagram which shows the structure of the engine key authentication device. It is a flowchart which shows the authentication control flow of an engine key.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, a crawler type power shovel, which is an example of a work vehicle according to the present invention, will be described. First, the overall configuration of the power shovel 1 will be described with reference to FIG.

As shown in FIG. 1, the power shovel 1 is provided on a traveling body 10 configured to be able to travel, a swivel body 20 provided on the upper part of the traveling body 10 so as to be horizontally swivel, and a front portion of the swivel body 20. It is configured to have an excavator device 30.

The traveling body 10 includes driving wheels, a plurality of driven wheels, and crawler mechanisms 15L and 15R having crawler bands 13 hung around these wheels, respectively, on both the left and right sides of the traveling body frame 11. The left and right crawler mechanisms 15L and 15R each have a traveling motor 16 for rotationally driving the drive wheels. The traveling body 10 is configured to be able to travel in an arbitrary direction and speed by controlling the rotation direction and rotation speed of the left and right traveling motors 16. A blade 18 is provided on the front portion of the traveling body frame 11 so as to be vertically swingable. The blade 18 is configured to be able to swing up and down by expanding and contracting the blade cylinder 19 straddling the traveling body frame 11.

A turning mechanism is provided in the center of the upper part of the traveling body frame 11. This swivel mechanism is composed of an inner ring fixed to the traveling body frame 11, an outer ring fixed to the swivel body 20, a swivel motor provided on the swivel body 20, and a hydraulic pump provided on the swivel body 20. It is configured to have a rotary center joint for supplying hydraulic oil to the left and right traveling motors 16 and the blade cylinder 19 provided in the above. The swivel body 20 is horizontally swiveled to the traveling body frame 11 via the swivel mechanism, and is configured to be swivel in the left-right direction with respect to the traveling body 10 by operating the swivel motor in the forward or reverse direction. There is. A main body side bracket 22 projecting forward is provided on the front portion of the swivel body 20.

The excavator device 30 is swingable in the vertical direction (undulating movement) by a boom bracket 39 attached to the main body side bracket 22 so as to be swingable in the horizontal direction about the vertical axis and a first swing pin 35a attached to the boom bracket 39. The boom 31 is freely attached (freely), the arm 32 is attached to the tip of the boom 31 so as to be able to swing (flexibly bend) in the vertical direction by the second swing pin 35b, and the tip of the arm 32 is provided. It is configured to have a link mechanism 33. The excavator device 30 further includes a swing cylinder 34 straddling between the swing body 20 and the boom bracket 39, a boom cylinder 36 straddling between the boom bracket 39 and the boom 31, and a boom 31 and an arm 32. It is configured to have an arm cylinder 37 straddled between them and a bucket cylinder 38 straddled between the arm 32 and the link mechanism 33.

The boom bracket 39 is configured to be swingable in the left-right direction with respect to the swivel body 20 (main body side bracket 22) by expanding and contracting the swing cylinder 34. The boom 31 is configured to be swingable (up and down) in the vertical direction with respect to the main body side bracket 22 (swivel body 20) by expanding and contracting the boom cylinder 36. The arm 32 is configured to be able to swing (bend and stretch) in the vertical direction with respect to the boom 31 by expanding and contracting the arm cylinder 37.

Various attachments such as a bucket, a breaker, a crusher, a cutter, and an auger device can be swingably attached to the tips of the arm 32 and the link mechanism 33 in the vertical direction. The attachment attached to the tip of the arm 32 is configured to swing with respect to the arm 32 via the link mechanism 33 by expanding and contracting the bucket cylinder 38. First to third attachment connection ports 41 to 43 to which a hydraulic hose for supplying hydraulic oil to supply hydraulic oil to the hydraulic actuators of these attachments can be connected are arranged on the left side surface of the arm 32.

The swivel body 20 is provided with an operator cabin 23 that forms an operation room on which an operator (operator) can board. The operator cabin 23 is formed in a substantially rectangular box shape, and an opening / closing door 23a is provided on the left side portion. In the operator cabin 23, an operator seat for the operator to sit facing forward, a pair of left and right traveling operation levers for operating the traveling body 10, and left and right for operating the swivel body 20 and the excavator device 30. A pair of work operation levers and work operation pedals, and a blade operation lever for operating the blade 18 are provided.

The swivel body 20 (positions behind and to the right of the operator cabin 23) includes the left and right traveling motors 16 and blade cylinders 19 of the traveling body 10, the swivel motor of the swivel body 20, and the swing cylinder 34 of the excavator device 30. A hydraulic drive device for supplying hydraulic oil to the boom cylinder 36, the arm cylinder 37, and the bucket cylinder 38 (hereinafter collectively referred to as a hydraulic actuator) is provided.

This hydraulic drive system controls the direction and flow rate of a diesel engine (hereinafter referred to as an engine), a plurality of hydraulic pumps (including a pilot hydraulic pump) driven by the engine, and hydraulic oil supplied to a hydraulic actuator. It includes a control valve unit and a pilot valve unit that generates a pilot hydraulic pressure for switching the spool of each control valve in the control valve unit according to the operation of the traveling operation lever, the work operation lever, and the like. The control valve unit and the pilot valve unit are configured to have a control valve and a pilot valve (remote valve) corresponding to each actuator of the hydraulic actuator.

In this hydraulic drive system, when the traveling operation lever or the like provided in the operator cabin 23 is operated, pilot hydraulic pressure corresponding to the operation direction and operation amount (operation state) is supplied from the pilot valve unit to the control valve unit. And the spool of the corresponding control valve is switched. Then, the hydraulic oil corresponding to the operating state of the operating lever or the like is supplied to the corresponding actuator via the control valve to be driven.

In the operator cabin 23, as shown in FIG. 2, a key cylinder 25 into which an engine key for starting the engine can be inserted, a display device 26 for displaying various information of the power shovel 1, and an operator are operated. Various switches are provided. A horn switch is provided as one of the various switches. By pressing the horn switch, a horn device 28 provided outside the operator cabin 23 can generate a warning sound that calls attention to the surroundings of the power shovel 1.

In the power shovel 1, when the operator gets in the operator cabin 23, inserts the engine key into the key cylinder 25 and rotates it to the START position, the engine is driven, and the engine drives a plurality of hydraulic pumps. Then, by tilting the left and right travel operation levers in the operator cabin 23 back and forth, the left and right crawler mechanisms 15L and 15R (travel motor 16) are driven according to the operation direction and the operation amount as described above. The power shovel 1 can be run. In addition, by tilting the left and right work operation levers back and forth and left and right, or by depressing the left and right work operation pedals, the excavator device 30 and the like are driven according to their operation directions and operation amounts to perform excavation and other work. Is configured to be able to do.

The key cylinder 25 provided in the operator cabin 23 has an OFF position where the engine key can be inserted and removed, and an ON position where electricity from the battery is supplied to various devices provided in the power shovel 1. It has a START position where the engine is driven, and is arranged in the order of OFF-ON-START. When the engine key is inserted into the key cylinder 25 and rotated to the ON position (or rotated to the START position to drive the engine), the power shovel 1 is attached to the display device 26 provided in the operator cabin 23. Various information is displayed. The contents displayed on the display device 26 include, for example, the remaining fuel amount, engine speed, cooling water temperature, mileage, various warning displays of the vehicle, ON / OFF status of various functions of the vehicle, and the like. It has become.

Next, the engine key authentication device 100 mounted on the power shovel 1 configured in this way will be described. As shown in FIG. 2, the engine key authentication device 100 includes a key authentication controller 105 that determines whether or not an engine key that has been inserted into the key cylinder 25 and rotated to the ON position side is registered in advance. The key authentication controller 105 includes a notification device 110 that notifies that the key is an unregistered key when it is determined that the engine key is an unregistered engine key (hereinafter referred to as an unregistered key).

The notification device 110 is provided inside the operator cabin 23 and is provided outside the buzzer device 111 that generates a warning sound inside the operator cabin 23, the display device 26 provided inside the operator cabin 23, and the outside of the operator cabin 23. It is configured to have the above-mentioned horn device 28 provided. The buzzer device 111, the display device 26, and the horn device 28 are adapted to generate a warning sound and display a warning based on a command signal from the key authentication controller 105.

An engine key that can be inserted into the key cylinder 25 to start the engine can be registered in advance in the key authentication controller 105. The engine key is registered by connecting an authentication computer (service tool) to the key authentication controller 105. An ID (serial number) is set in the engine key, and a transponder (transmitter / responder) is built in. When the first engine key is inserted into the key cylinder 25 and rotated to the ON position, the authentication computer connected to the key authentication controller 105 can put the key authentication controller 105 into the key registration mode. ing. At this time, the ID is transmitted from the transponder of the first engine key inserted in the key cylinder 25 to the key authentication controller 105, and the first engine key is registered in the memory of the key authentication controller 105 as the master key. The first engine key (master key) is not registered as a key capable of starting the engine.

In the key registration mode of the key authentication controller 105, when the master key (first engine key) is pulled out from the key cylinder 25, the second engine key is inserted into the key cylinder 25 and rotated to the ON position, this second engine key is obtained. The ID (serial number) is transmitted from the transponder of the engine key to the key authentication controller 105, and the second engine key is registered in the memory of the key authentication controller 105 as a key capable of starting the engine. Then, the second engine key is pulled out from the key cylinder 25, and the third, fourth, ... Engine keys can be registered in the same manner. A plurality of engine keys (for example, 13 engine keys) can be registered in the key authentication controller 105, and when the maximum number of registrations is reached, that fact is displayed on the screen of the authentication computer. There is. Then, when the master key (first engine key) is reinserted into the key cylinder 25 and rotated to the ON position, or when a predetermined time (for example, 5 minutes) elapses from the time when the last engine key is registered, the key authentication controller At 105, the key registration mode ends.

In the state where the master key is inserted into the key cylinder 25 and rotated to the ON position, it is registered in the memory of the key authentication controller 105 by the authentication computer (service tool) connected to the key authentication controller 105. It is also possible to delete the ID information of the master key and the registration key.

When the engine key is inserted into the key cylinder 25 and rotated to the ON position or the START position, the key authentication controller 105 sets the ID of the engine key to the engine key registered in advance in the memory as described above (hereinafter referred to as the engine key). , Is referred to as a registration key), and is configured to determine whether or not the engine key inserted in the key cylinder 25 is a registration key. When the key authentication controller 105 determines that the engine key inserted in the key cylinder 25 is a registration key, it permits the engine to be started by the engine key, and when the engine key is rotated to the START position, the engine control unit (ECU) It is designed to control the engine to be started via.

On the other hand, when the key authentication controller 105 determines that the engine key inserted in the key cylinder 25 is not a registered key (it is an unregistered key), it regulates the engine start by the engine key and is rotated to the START position. However, it is configured to cut off the engine starter circuit and control the engine so that it does not start. Further, when it is determined that the key is not registered, a command signal is transmitted to the buzzer device 111 to generate a warning sound by the buzzer device 111, and a command signal is transmitted to the display device 26 to display a warning by the display device 26. It is configured to allow. These warning sounds and warning displays notify that an unregistered key has been inserted into the key cylinder 25 in the operator cabin 23. Further, when the rotation operation of the unregistered key to the START position is repeated a predetermined number of times or more (for example, 5 times), a command signal is transmitted to the horn device 28 and the horn device 28 is configured to generate a warning sound. ing. The warning sound from the horn device 28 notifies the surroundings of the power shovel 1 that an unregistered key has been inserted into the key cylinder 25.

FIG. 3 shows an engine key authentication control flow performed by the key authentication controller 105. When the engine key is inserted into the key cylinder 25 and rotated to the ON position or the STAT position, the ID (serial number) of the engine key is read (step S1). Then, the read ID is compared with the ID of the engine key (registration key) registered in advance (step S2). If the read ID matches the ID of the registration key, it is determined whether or not the engine key has been rotated to the START position (step S3), and when it is rotated to the START position, a command signal is sent to the engine control unit. To start the engine.

In step S2, if the ID of the engine key inserted into the key cylinder 25 does not match the ID of the registration key, a warning that the engine key is an unregistered key is displayed on the screen of the display device 26 in the operator cabin 23. The display is performed (step S4). Further, a warning sound is generated from the buzzer device 111 in the operator cabin 23 to notify that the engine key is an unregistered key (step S5). At this time, the buzzer device 111 generates, for example, a short buzzer sound five times. Then, it is determined whether or not the engine key has been returned to the OFF position (step S6), and when the engine key is returned to the OFF position, the warning display by the display device 26 and the generation of the warning sound by the buzzer device 111 are stopped (step). S
7) Return to the beginning of the control flow.

When the engine key has not been returned to the OFF position in step S6, it is determined whether or not the engine key has been rotated to the START position (step S8). When it is not rotated to the START position, the process returns to step S6. On the other hand, when it is rotated to the START position, it is determined whether or not the rotation to the START position is the fifth time or more (step S9), and at the first to fourth times, it is again from the buzzer device 111 in the operator cabin 23. A warning sound is generated (step S10), and the process returns to step S6. Also in step S10, the buzzer device 111 generates, for example, a short buzzer sound five times.

When it is determined in step S9 that the engine key has been rotated to the START position five times or more, a warning sound is generated from the horn device 28 provided outside the operator cabin 23, and the engine is started using the unregistered key. Notifying the surroundings of the power shovel 1 that the engine is to be made (step S11). At this time, the horn device 28 continues to sound the warning sound for a predetermined time (for example, 2 minutes), and then the warning sound stops sounding. Then, it is determined whether or not the engine key has been returned to the OFF position (step S12), and when it is returned to the OFF position, the generation of the warning sound by the horn device 28 is stopped (step S13), and the beginning of the control flow. Return to. On the other hand, when the position is not returned to the OFF position, the horn device 28 automatically stops after generating a warning sound for a predetermined time, and returns to step S8. In this way, the key authentication controller 105 is configured to perform authentication control of the engine key.

In this way, in the power shovel 1, when the key authentication controller 105 determines that the key is an unregistered key, the buzzer device 111 and the display device 26 in the operator cabin generate a warning sound and display a warning, and the START position of the unregistered key. When the rotation operation to is repeated 5 times or more, the horn device 28 is configured to generate a warning sound also around the power shovel 1. Therefore, when an attempt is made to steal the power shovel 1 using an unregistered key, the buzzer device 111 and the display device 26 not only give a warning notification in the operator cabin 23, but also the horn device 28 surrounds the power shovel 1. Can also give warning notifications. Therefore, it is possible to notify the surroundings of the power shovel 1 that the power shovel 1 is in a state of being stolen, thereby preventing the theft.

Further, when the key authentication controller 105 determines that the key is unregistered and the buzzer device 111 or the like in the operator cabin gives a warning, if the unregistered key is returned to the OFF position, the buzzer device 111 or the like The warning notification is stopped, and the horn device 28 is configured not to generate a warning sound. Therefore, even if the operator mistakenly uses the unregistered key, the horn device 28 generates a warning sound around the vehicle only by notifying the operator of the unregistered key by the buzzer device 111 or the like. It is possible to avoid a situation that attracts the attention of the surroundings. Further, since the warning display is configured not only by the buzzer device 111 but also by the display device 26 in the operator cabin 23, it is surely notified in the operator cabin that the unregistered key is used. be able to. Furthermore, it is configured to be regulated so that the engine does not start when it is determined that the key is unregistered. Therefore, theft using an unregistered key can be reliably prevented.

Although the embodiments of the present invention have been described so far, the scope of the present invention is not limited to the above-described embodiments. For example, in the above-described embodiment, when the engine key is inserted into the key cylinder 25 and rotated to the ON position or the START position, the engine key inserted into the key cylinder 25 is the registration key. Although it is configured to determine whether or not it is, it is also configured to determine whether or not it is a registration key when it is inserted into the key cylinder 25 (when it is not rotated to the ON position). Good.

In the above-described embodiment, the horn device 28 is configured to generate a warning sound when the rotation operation of the unregistered key to the START position is repeated 5 times or more, but this 5 times is an example. It may be changed to 1 to 4 times, or 6 times or more as appropriate. Further, not when the operation of rotating the unregistered key to the START position is repeated more than a predetermined number of times, but when a predetermined time elapses from the time when the warning sound and the warning display are performed by the buzzer device 111 and the display device 26. , The horn device 28 may be configured to generate a warning sound. Further, in the above-described embodiment, when the unregistered key is returned to the OFF position, the warning by the display device 26, the buzzer device 111, and the horn device 28 is stopped, but a predetermined stop operation is performed. It may be configured to continue the warning until it is done.

In the above-described embodiment, the display device 26 in the operator cabin 23 is also configured to display a warning. However, in the operator cabin 23, the buzzer device 111 only generates a warning sound, and the display device 26 It may be configured not to display a warning. Further, although the power shovel 1 is configured to generate a warning sound (warning sound indicating that the key is not registered) around the power shovel 1 by using the horn device 28 conventionally provided in the power shovel 1. A warning device different from the horn device 28 may be provided, and the warning sound may be generated by the warning device.

In the above-described embodiment, the case where the present invention is applied to a power shovel in which a hydraulic pump is driven by the power of an engine and the hydraulic pump discharged from the hydraulic pump is used for traveling or the like has been described. Instead of the engine, a battery and an electric motor may be mounted, and the hydraulic pump may be driven by the electric motor, or each actuator may be directly driven by the electric motor. Further, in the above-described embodiment, the case where the present invention is applied to a crawler traveling type power shovel has been described, but the present invention is used in a work machine other than a wheel traveling type power shovel or a skid steer loader. Can also be applied.

1 Power shovel (work vehicle)
10 Traveling body (vehicle)
20 Swivel body (vehicle)
23 Operator cabin 25 Key cylinder 26 Display device 28 Horn device (second warning device)
30 Excavator device (working device)
100 Engine key authentication device 105 Key authentication controller 110 Notification device 111 Buzzer device (first warning device)

Claims (3)

A vehicle that has a prime mover and can travel by power from the prime mover,
The work equipment provided in the vehicle and
It is provided with an operator cabin provided in the vehicle and forming an operation room.
The prime mover can be started by inserting a start key into a key cylinder provided in the operator cabin and rotating the start key from the off position, which is the insertion position, to the start position via the on position. In a working vehicle
When the start key is inserted into the key cylinder and is rotated from the off position to the on position, a key authentication controller that determines whether or not the inserted start key is registered in advance, and a key authentication controller.
A first warning device provided in the operator cabin and generating a warning sound in the operator cabin,
A second warning device provided on the vehicle and generating a warning sound around the vehicle is provided.
When it is determined by the key authentication controller that the start key inserted into the key cylinder and rotated from the off position to the on position is unregistered, the first warning device warns in the operator cabin. A sound is generated, and when the start key is rotated from the on position to the start position, the second warning device is configured to generate a warning sound around the vehicle .
When the unregistered start key is rotated from the off position to the on position and a warning sound is generated by the first warning device, the operation of returning the unregistered start key to the off position side is performed. When this is done , the work vehicle is configured so that the generation of the warning sound by the first warning device is stopped and the warning sound is not generated by the second warning device . A display device provided in the operator cabin and displaying a warning in the operator cabin is provided.
When the key authentication controller determines that the start key inserted into the key cylinder is unregistered, the first warning device generates a warning sound and the display device warns in the operator cabin. The work vehicle according to claim 1 , wherein the work vehicle is configured to display. When the key authentication start key inserted into the key cylinder by the controller is determined to be of unregistered, claim 1, wherein the prime mover is configured to be restricted so as not to start Alternatively , the work vehicle described in 2 .

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