JP5778068B2 - Work machine, work machine anti-theft system, and work machine controller program - Google Patents

Description

  The present invention relates to a work machine such as a backhoe, a tractor, and a combiner, a work machine anti-theft system, and a work device control program.

  In recent years, an anti-theft device for preventing theft as in an automobile has been attached to a work machine as equipment. In order to improve the anti-theft effect, many anti-theft devices prevent the anti-theft device attached to the work equipment from being removed later, or the user may attach the anti-theft device after purchasing the work equipment. It has a difficult structure. Therefore, even if a user or the like wants to attach an anti-theft device after purchasing a work machine, it is difficult to add an anti-theft function to the work machine later.

  For this reason, a technology has been developed that can easily attach an anti-theft device even after retrofitting. For example, in the anti-theft device (operation permission control device) of Patent Document 1, a setting storage medium prepared separately from the portable recording medium is incorporated, and authentication is performed only when the setting storage medium is attached to the operation permission control device. Processing is performed to start the engine.

Japanese Patent No. 4637179

  In the anti-theft device of Patent Document 1, the anti-theft function can be added to the work machine even after retrofitting by mounting the anti-theft device on the work machine and incorporating a setting storage medium. However, in this anti-theft device, it is necessary to provide a switch such as a relay in the signal line for outputting a signal for starting the engine. If the work machine is not modified, an anti-theft function can be added to the work machine. The reality is that you can't.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a work machine, a work machine anti-theft system, and a work machine control device program that can be easily retrofitted with an anti-theft function. .

The technical means of the present invention for solving this technical problem is characterized by the following points.
The invention according to claim 1 is a work machine including a work machine control device having a permission mode for permitting engine operation by an engine key and a prohibit mode for prohibiting engine operation by the engine key, The machine control device includes a switching means for switching from the permission mode to the prohibition mode when the retrofitting antitheft device is connected to the work machine control device, and in the prohibition mode, the engine operation is performed based on a command from the antitheft device. The engine operating means to permit is provided.

The invention according to claim 2 is characterized in that the engine operating means permits engine starting which is one of engine operations based on a command from the anti-theft device.
According to a third aspect of the present invention, there is provided a work machine including a work machine control device including a permission mode for allowing engine operation by an engine key and a prohibit mode for prohibiting engine operation by the engine key; An anti-theft system for a work machine comprising an after-theft anti-theft device connected to the control device, wherein the work machine control device is permitted when the post-theft anti-theft device is connected to the work machine control device. Switching means for switching from the mode to the prohibit mode, and engine operating means for permitting engine operation based on a permission command from the anti-theft device in the prohibit mode.

The invention according to claim 4 is characterized in that the engine operating means permits engine start which is one of engine operations based on a command from the anti-theft device.
In the invention which concerns on Claim 5, it is a program of the control apparatus for working machines provided with the permission mode which permits an engine operation with an engine key, and the prohibition mode which prohibits the engine operation by the said engine key,
A step of switching from a permission mode to a prohibition mode when a retrofitting antitheft device is connected to the work machine control device; and a step of permitting engine operation based on a permission command from the antitheft device in the prohibition mode. Are executed.
The most preferred technical means of the present invention are as follows.
The work machine of the present invention includes a permission mode for allowing engine operation by an engine key and a prohibit mode for prohibiting engine operation by the engine key, and the work machine control device connectable to a vehicle communication network, and the vehicle A switch for switching from the permission mode to the prohibition mode when the retrofit anti-theft device is connected to the vehicle communication network. Means for obtaining a switching program for realizing the means from the post-theft anti-theft device, and when the post-theft anti-theft device is connected to the vehicle communication network, the prohibit mode is based on a command from the anti-theft device. The post-theft operation program that realizes an engine operation means that permits engine operation Means for acquiring from a stopping device, and the switching means switches from a permission mode to a prohibition mode after detecting the connection of the retrofitting antitheft device to the vehicle communication network, and the prohibition mode is for the vehicle. Even if the retrofitting antitheft device is removed from the communication network, it is retained.
The anti-theft system for a working machine according to the present invention permits engine operation with an engine key.
A work machine control device comprising a permission mode and a prohibit mode for prohibiting engine operation by the engine key and connectable to a vehicle communication network provided in the work machine; and the work via the vehicle communication network An anti-theft device that can be connected to a machine control device and has the switching program and the operation program, and the work machine control device is connected to the vehicle communication network. And a means for obtaining a switching program for realizing switching means for switching from the permission mode to the prohibition mode from the retrofit anti-theft device, and the prohibition when the retrofit antitheft device is connected to the vehicle communication network. In the mode, the engine operation allows the engine operation based on a command from the anti-theft device. Means for obtaining an operation program for realizing a stage from the retrofitting anti-theft device, and the switching unit switches from the permission mode to the prohibition mode after detecting the connection of the post-theft anti-theft device to the vehicle communication network. The switching and prohibition mode is maintained even if the retrofitting antitheft device is removed from the vehicle communication network.
The retrofitting anti-theft device includes a data communication device connectable to the vehicle communication network and having an identification code, and an external device capable of wireless communication with the data communication device and having an identification code. At the time of wireless communication between the device and the external device, the identification code of the data communication device and the identification code of the external device are collated, and after the collation is established, the switching program and the operation program of the external device are stored in the data Send to communication device.

The present invention has the following effects.
According to the first, third, and fifth aspects of the invention, when the work implement control device is in the permission mode, the engine operation of the work implement can be easily performed using the engine key. If the anti-theft device is connected to the prohibit mode, the engine can be operated only in response to a command from the anti-theft device, and a new anti-theft function can be easily added to the work machine.

  According to the second and fourth aspects of the invention, it is possible to easily permit or prohibit the starting of the engine.

1 is an overall view of a work machine anti-theft system. It is explanatory drawing which records ID code. It is an operation | movement diagram of a main control apparatus, a data communication apparatus, and an external apparatus. The whole side view of a working machine is shown.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an overall view of a work machine antitheft system.
In the anti-theft system of a work machine, by attaching a post-theft anti-theft device (additional anti-theft device) 40 to the work machine 1, such as a backhoe, tractor, combine, etc. The anti-theft function is added to the machine 1. First, taking the backhoe as an example, the configuration of the working machine will be described.

FIG. 4 shows an overall view of the work machine.
As shown in FIG. 4, the work machine 1 includes a lower traveling device 2 and an upper revolving unit 3. The traveling device 2 includes a pair of left and right traveling bodies 4 each having a rubber cover, and a crawler traveling device is employed in which both traveling bodies 4 are operated by a traveling motor. Further, a dozer 5 is provided at the front portion of the traveling device 2.

  The swivel body 3 includes a swivel base 12 supported on the traveling device 2 via a swivel bearing 11 so as to be able to turn left and right around a swivel axis in the vertical direction, and a working device 13 ( Drilling device). On the swivel base 12, an engine, a radiator, a driver's seat 9, a fuel tank, a hydraulic oil tank, a control valve for controlling hydraulic oil from the hydraulic oil tank, and the like are provided. Around the driver's seat 9, a display device that displays various information regarding the work machine 1 is provided. The driver's seat 9 is surrounded by a cabin 14 provided on the turntable 12.

  The working device 13 includes a swing bracket 17 supported on a support bracket 16 provided at the front portion of the swivel base 12 so as to be offset slightly to the right from the central portion in the left-right direction, and swingable to the left and right around the vertical axis. The boom 18 is pivotally attached to the swing bracket 17 so that the base side is pivotable about a left-right axis, and is supported so as to be swingable up and down, and on the distal end side of the boom 18 about the left-right axis. The arm 19 is pivotally mounted and supported so as to be able to swing back and forth, and a bucket 20 is provided on the distal end side of the arm 19 so as to be capable of squeezing and dumping.

  The swing bracket 17 is swung by expansion and contraction of a swing cylinder provided in the swivel base 12, and the boom 18 is swung by expansion and contraction of a boom cylinder 22 interposed between the boom 18 and the swing bracket 17. The arm 19 is swung by the expansion and contraction of the arm cylinder 23 interposed between the arm 19 and the boom 18, and the bucket 20 is a bucket cylinder 21 interposed between the bucket 20 and the arm 19. Squeezing and dumping is performed by expanding and contracting.

Each cylinder (swing cylinder, boom cylinder 22, arm cylinder 23 bucket cylinder 21) is operated by hydraulic oil whose flow rate is controlled by a control valve.
FIG. 1 shows an overall view of a work machine antitheft system.
The work machine 1 is provided with a plurality of control devices such as a main control device 30 that mainly controls the work machine and an engine control device that controls the engine. Hereinafter, the control device mounted on the work machine is referred to as a work machine control device. Each work machine control device can transmit and receive data via a vehicle communication network N such as a Controller Area Network (CAN communication). The vehicle communication network may be FlexRay or another network. Among the plurality of work machine control devices, at least one work machine control device (for example, the main control device 30) is provided with a function for preventing the work machine 1 from being stolen. Hereinafter, the anti-theft will be described by taking the main controller 30 as an example.

The main control device 30 is composed of a CPU and the like, and can control various devices (traveling device, work device, etc.) provided in the work machine 1 and can prevent the work machine 1 from being stolen. For example, the main control device 30 can perform traveling second speed control, unload switching control, hydraulic oil control, and the like.
The traveling 2 speed control is a control for switching the traveling apparatus 2 between a high speed and a low speed based on an ON / OFF input signal from a traveling 2 speed switch 32 that switches the traveling apparatus 2 between a high speed and a low speed. In the unload switching control, the hydraulic oil discharged from the pump can be supplied to the control valve and cannot be supplied based on an ON / OFF input signal from a lever lock switch 33 provided on the side of the driver's seat 9. This is control to switch. In the hydraulic oil control, the control valve is controlled based on the operation amount of the operation lever 34 installed in the driver's seat 9 and the like, and the flow rate of the hydraulic oil supplied to each cylinder is controlled. As described above, various devices are operated by performing the second traveling speed control, the unload switching control, and the hydraulic oil control by the main control device 30. The main control device 30 may be any device that controls various devices, and is not limited to the exemplified control.

Now, the main control device 30 has a permission mode and a prohibition mode. The permission mode and the prohibition mode are configured by a program stored in the main control device 30.
The permission mode is a mode in which engine operation (sometimes referred to as engine operation) is permitted by an engine key for starting the engine of the work machine 1. In this permission mode, for example, when the engine of the work machine 1 is started, if the engine key is inserted into the key cylinder and the starter switch 35 is turned on by turning the engine key, the starter relay 36 is operated to start the engine. A signal is output to start the engine. In the permission mode described above, the engine start of the work implement is permitted if the engine key is normal, and the engine start of the work implement is not permitted if the engine key is illegal.

  As will be described later, the main control device 30 is held in a permission mode in a state where the anti-theft device 40 is not connected (default state) so that the engine operation by the engine key can be permitted. The engine start, which is one of the engine operations, is not limited to a mechanical type (key cylinder type) in which an engine key is inserted into a key cylinder and the starter relay 36 is turned on. Smart entry type may be prohibited.

In the prohibit mode, engine operation is not permitted by the engine key (permission of engine operation by the engine key is prohibited), and engine operation is permitted by a signal from a device other than the engine key.
For example, even if the work machine control device 30 does not receive an external signal (permission command from the anti-theft device 40) and simply turns the starter switch 35 from OFF to ON by operating an engine key, The starter relay 36 is not turned on and the engine start is not permitted. That is, the prohibit mode is a mode in which the engine of the work implement cannot be operated unless a permission command is received from the antitheft device 40.

Such a main control device 30 is provided with switching means 41 for switching between a permission mode and a prohibition mode. The switching means 41 is configured by a program stored in the main control device 30.
Specifically, the switching means 41 switches the main control device 30 from the permission mode to the prohibition mode when the antitheft device 40 is connected. For example, the vehicle communication network N is provided with a connector 42 that connects the main control device 30 and the outside (the outside of the work machine 1), and the main control device 30 detects that the antitheft device 40 is connected to the connector 42. Then, the switching means 41 switches the main control device 30 from the permission mode to the prohibit mode, and holds the prohibit mode. Even if the antitheft device 40 is removed from the connector 42, the mode of the main control device 30 is maintained in the prohibit mode.

For example, when the anti-theft device 40 is connected to the main control device 30, the program that realizes the switching means 41 is transmitted from the anti-theft device 40 to the main control device 30 and is stored in the main control device 30. After being stored in, start.
Note that the switching program may be stored in the main control device 30 in advance before connecting the anti-theft device 40. For example, a switching program for switching from the permission mode to the prohibition mode when a predetermined connection signal is input to the main control device 30 is stored in the main control device 30 in advance. On the other hand, the anti-theft device 40 is configured to transmit to the main control device 30 a connection signal for switching from the permission mode to the prohibition mode when the main control device 30 is connected.

Now, when the antitheft device 40 is connected to the main control device 30, the antitheft device 40 transmits to the main control device 30 a program (operation program) for realizing an engine operation means 43 described later. When receiving the operation program, the main control device 30 saves (stores) the operation program.
When the permission command indicating permission of engine operation is input from the antitheft device 40 to the main control device 30 in a state where the main control device 30 is held in the prohibit mode, the engine operation means 43, for example, a starter relay An engine start signal is output to 36, and permission to start the engine is executed. Further, when the main controller 30 is held in the prohibit mode, the engine operating means 43 sends an engine start signal to the starter relay 36 if no permission command is input from the anti-theft device 40 to the main controller 30. Do not output. In other words, the engine operating means 43 performs permission or prohibition of engine operation based on a command from the anti-theft device 40, and is different from that for permitting or prohibiting engine operation in the permission mode. Is.

  Thus, in the present invention, the antitheft device 40 can be connected to the work machine, and the mode of the main control device 30 that has been in the permission mode in the default state can be set to the prohibit mode. In the prohibit mode, even if there is an engine key, it is possible not to permit the engine operation unless it is based on the command of the anti-theft device 40, thereby adding an anti-theft function to the work machine. Can do.

Hereinafter, the antitheft device 40 will be described in detail.
The anti-theft device 40 is a tablet PC (TabletPC), a smartphone having a telephone function (Smartphone) or the like, and is easy to carry external data 45, data of the external device 45 and the work machine (main control device 30). It is comprised from the data communication apparatus 46 which enables communication.

The data communication device 46 enables data communication between the vehicle network N in the work machine 1 and the network of the external device 45. The data communication device 46 converts, for example, data on CAN communication into data corresponding to WiFi (registered trademark) and sends the data to the external device 45 by wireless communication, or converts data output from the external device 45 to CAN communication. It can be converted into corresponding data and sent to the main controller 30. Further, the data communication device 46 includes an identification code for identifying the data communication device 46. When pairing between the external device 45 and the data communication device 46 is established using the identification code, the external device 45 is provided. Data communication with can be performed. The pairing between the external device 45 and the data communication device 46 is performed by collating the identification code registered in the external device 45 in advance with the identification code of the data communication device 46. When the collation is established, the pairing is established. Is done. This identification code is preferably information that can be known only by the user who owns the data communication device 46, and is, for example, an SSID (Service Set Identifier) or an encryption key (for example, WEP, WPA, WPA2, WPS). . The data communication between the data communication device 46 and the external device 45 is preferably performed wirelessly, but may be wired.

  The external device 45 stores an anti-theft program for realizing an anti-theft function. The anti-theft program is configured by an application (Application software) stored in the external device 45, and the user who owns the external device 45 downloads an app including the anti-theft program from a server or the like that manages the application. Can be acquired. In order to acquire an application including an anti-theft program, it is necessary to perform user registration in advance with a management company or the like that manages the application in order to download the application. It is preferable that the anti-theft program is produced by a manufacturing company that manufactures the work machine 1, a sales company that sells the work machine, or a repair company that performs maintenance of the work machine, and can be downloaded by a server or the like.

  The external device 45 includes a collation unit 47 that collates an ID code (referred to as a first code) recorded in the external device 45 and an ID code (second code) input to the external device 45, and a first code. Output means 48 for outputting a command (permission command) indicating permission of engine start to the main control device 30 (work machine 1) when collation with the second code is established. The collating means 47 and the output means 48 are composed of the above-described antitheft program.

  The first code can be recorded (saved) in the external device 45. In order to save the first code, first, the anti-theft program stored in the external device 45 is started, and an ID is displayed on the screen of the external device 45 by various operations, for example, as shown in FIG. The code registration screen R1 is displayed. Thereafter, when the user or the like inputs the ID code on the registration screen R1 and presses the completion button (Enter) on the registration screen R1, the first code input to the external device 45 on the registration screen R1 is stored in the external device 45. Is done. The first code is preferably, for example, a unique number set in a work machine owned by a user having the external device 45.

  In order to input the second code to the external device 45, first, after recording the first code, the anti-theft program of the external device 45 is started, and for example, as shown in FIG. The ID code input screen R2 is displayed. The user or the like can input the second code by inputting the ID code on the input screen R2 and pressing the completion button (Enter) on the input screen R2. When the input of the second code is completed, the collation unit 47 collates the first code and the second code. When the collation is established, the output unit 48 outputs a permission command to the data communication device 46.

  FIG. 3 shows a procedure until the anti-theft device 40 is connected to the work machine and the engine is started. It is assumed that the anti-theft program including the operation program is already stored in the external device 45 and the first code is recorded. In addition, it is assumed that the switching program is already stored in the main control device 30. Further, “S” in FIG. 3 is a symbol indicating a step.

First, when the data communication device 46 is connected to the work machine side connector 42, a connection signal indicating that the data communication device 46 (theft prevention device 40) is connected is input to the main control device 30 (S1). The main control device 30 receives the connection signal from the data communication device 46, and switches the main control device 30 from the permission mode to the prohibition mode by the switching means 41 (S2).
On the other hand, the external device 45 requests an identification code from the data communication device 46 (S3), and the data communication device 46 sends the identification code stored in the data communication device 46 to the external device 45 in response to the request from the external device 45. Output (S4). When the external device 45 receives the identification code from the data communication device 46, the identification code output from the data communication device 46 and the identification code stored in the external device 45 are collated (S5). 45 permits data communication with the data communication device 46 (S6). When the pairing between the external device 45 and the data communication device 46 is established as shown in S6, when the connection between the external device 45 and the main control device 30 is the first time, the external device 45 executes the operation program, The data is transmitted to the main controller 30 via the data communication device 46 (S7). When the main control device 30 receives the operation program, the main control device 30 stores the operation program inside (S8). If the connection between the external device 45 and the main control device 30 is not the first time, that is, if the operation program is already stored in the main control device 30, S7 and S8 are omitted.

After the operation program is stored, the operation program is automatically executed if the main control device 30 is in the prohibit mode. When the operation program is executed, the main control device 30 waits until there is a permission command for permitting engine start from the data communication device 46 (external device 45), and does not start the engine during standby.
As described above, the main control device 30 enters the prohibit mode by connecting the data communication device 46 to the connector 42, and the operation program transmitted from the external device 45 is stored in the main control device 30. .

  When the main control device 30 is in the prohibit mode and the operation program is added to the main control device 30, the user or the like starts the anti-theft program of the external device 45 and inputs displayed on the screen of the external device 45 When the ID code (second code) is input to the screen R2, the collation means 47 of the external device 45 collates the second code with the first code (S9). When the verification between the first code and the second code is established, the output unit 48 transmits a permission command to the data communication device 46 (S10), and the data communication device 46 outputs a permission command to the main control device 30 ( S11). When the verification between the first code and the second code is not established, the output unit 48 does not transmit a permission command to the data communication device 46.

If there is a permission command from the data communication device 46 (external device 45) while the prohibit mode is maintained, the main control device 30 starts the engine of the work machine 1 by the engine operating means 43 (S12).
In FIG. 3, the description has been made on the assumption that the switching program is stored in the main control device 30 without the addition of the anti-theft function, but the anti-theft program including the switching program is downloaded to the external device 45. Alternatively, the downloaded switching program may be added to the main control device 30.

  When adding the switching program to the main controller 30, first, before connecting the data communication device 46 to the connector 42, as shown in S3 to S6 described above, the pair of the external device 45 and the data communication device 46 is paired. A ring is established so that data communication between them is possible. Next, in a state where data communication can be performed between the external device 45 and the data communication device 46, when the connection between the external device 45 and the main control device 30 is the first time, the external device 45 transmits a switching program to the data communication device. 46 to the main control device 30. When the main control device 30 receives the switching program, the switching program of the main control device 30 is executed, and the main control device 30 is switched from the permission mode to the prohibition mode. Even when the switching program is not stored in the main control device 30 in advance, the storage of the operation program and the like are the same as S7 and S8 described above.

  According to the present invention, for example, when the user purchases the work implement 1 and the anti-theft device 40 is not attached, that is, when the main control device 30 is in the permission mode, it is attached when the work implement is purchased. The engine of the work machine 1 can be easily started using the engine key that has been used. Also, if the anti-theft program is downloaded from a server or the like to the external device 45 owned by the user and the data communication device 46 is connected to the work machine, the engine cannot be started with the engine key. An anti-theft function that cannot start the engine of the machine 1 can be newly added to the work machine.

In the embodiment described above, the anti-theft device 40 is composed of the data communication device 46 and the external device 45. However, the anti-theft device 40 is an integrated device of the data communication device 46 and the external device 45. Also good.
In the above-described embodiment, after starting the anti-theft program (application), the user inputs the second code on the input screen R2 and collates the second code with the first code. In addition to this, it is preferable that a user-specific encryption code for starting the antitheft program is input to the external device 45 so that the antitheft program can be started only when verification of the encryption code is established. In this way, since the anti-theft program cannot be started unless the verification of the encryption code is established, the anti-theft effect can be further enhanced.

  In the above-described embodiment, the ID code registration screen R1 is displayed on the screen of the external device 45, and the user or the like records the first code by inputting the ID code on the registration screen R1. When the anti-theft program (application) is downloaded from the server, the server may automatically issue the first code so that the first code is recorded in the external device 45 together with the anti-theft program. In this case, for example, after the pairing between the data communication device 46 and the external device 45 is established, the external device 45 outputs the first code acquired when the application is downloaded to the data communication device 46 as the second code, and the data The communication device 46 may store the second code. The collation of the first code and the second code is performed by the external device 45 requesting the second code from the data communication device 46, and in response to this request, the second code transmitted from the data communication device 46 and the antitheft program in advance. It is preferable to perform this by collating the first code acquired when downloaded. A plurality of ID codes (first codes) may be registered for one anti-theft program downloaded from the server.

  The pairing operation between the data communication device 46 and the external device 45 (a program for collating identification codes or permitting data communication) may be configured by a program different from the anti-theft program. A program for pairing operation may be included in the prevention program. In this way, if the application of the anti-theft program is not stored in the external device 45, pairing of the data communication device 46 and the external device 45, that is, permission of data communication cannot be executed. It is possible to prevent the engine from being started by communication between 46 and the external device 45.

  In the above-described embodiment, when the main control device 30 receives the permission command from the post-theft anti-theft device 40, the engine operation unit 43 permits the “engine start”. However, the engine operation unit 43 and the post-theft anti-theft The permission of the engine operation by the permission command of the device 40 is not limited to “engine start”. For example, when the engine is operating, the engine operating means is transmitted only when the anti-theft device 40 periodically transmits a permission command to the main control device 30 and the main control device 30 periodically receives the permission command. “Continuation of engine operation” by 43 may be permitted. Further, when the permission command from the anti-theft device 40 is interrupted while the engine is operating, the engine operating means 43 may perform “stop engine operation” by not permitting the engine operation.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims. In the embodiment described above, permission or prohibition of engine operation (start) is executed by turning on or off the starter relay 36, but instead, a fuel flow path for supplying fuel to the engine is formed using an on-off valve or the like. The engine operation (starting) may be permitted or prohibited by opening or closing, or the engine operation (starting) may be permitted or prohibited by executing or stopping the engine control. The prohibition may be any method.

  The control of the above-described control device (for example, the main control device 30) is not limited to the above-described one, and various controls may be performed depending on the work machine to be applied. For example, if the work machine is a combine, the control adapted to the combine If it is a backhoe, control suitable for the backhoe is performed. Further, the control device provided with a function for preventing theft of the work machine 1 is not limited to the main control device 30, and may be any control device mounted on the work machine 1. For example, an engine control device that mainly controls the engine may be used.

In the embodiment described above, the work machine control device 30 has started the engine by receiving a permission command from the anti-theft device 40. Instead, after receiving the permission command from the anti-theft device 40, The engine start permission may be executed only when the starter switch 35 is turned on from off by operating the engine key. That is, in the prohibit mode, even when the engine start is permitted when there is an operation of turning on the starter switch 35 by the engine key and an operation of receiving a permission signal from the anti-theft device 40 by the external device 45 or the like. Good.

DESCRIPTION OF SYMBOLS 1 Work implement 2 Traveling apparatus 3 Revolving body 4 Traveling body 5 Dozer 9 Driver's seat 11 Swivel bearing 12 Swivel base 13 Working apparatus 14 Cabin 16 Support bracket 17 Swing bracket 18 Boom 19 Arm 20 Bucket 21 Bucket cylinder 22 Boom cylinder 23 Arm cylinder 30 Main control device 32 Travel 2 speed switch 33 Lever lock switch 34 Operation lever 35 Starter switch 36 Starter relay 40 Retrofitting antitheft device 41 Switching means 42 Connector 43 Engine operating means 45 External equipment 46 Data communication equipment 47 Verification means 48 Output means

Claims (5)

A work machine control device that includes a permission mode for allowing engine operation by an engine key and a prohibit mode for prohibiting engine operation by the engine key, and is connectable to a vehicle communication network;
An after-theft prevention device connectable to the vehicle communication network;
A working machine equipped with
The work machine control device includes:
Means for obtaining in the retrofit antitheft device is connected to a communication network for the vehicle, the switching program for realizing the switching means for switching the inhibit mode from the permission mode from the retrofit antitheft device,
When the retrofitting anti-theft device is connected to the vehicle communication network, an operation program that realizes an engine operating means for permitting the engine operation based on a command from the anti-theft device in the prohibit mode is the anti-theft anti-theft device. Means for obtaining from the device;
Have
The switching means switches from a permission mode to a prohibition mode after detecting the connection of the retrofitting antitheft device to the vehicle communication network,
The work machine , wherein the prohibit mode is maintained even if the retrofitting anti-theft device is removed from the vehicle communication network .   The work machine according to claim 1, wherein the engine operation unit permits engine start that is one of engine operations based on a command from the antitheft device. A work machine control device that includes a permission mode for allowing engine operation by an engine key and a prohibit mode for prohibiting engine operation by the engine key, and is connectable to a vehicle communication network provided in the work machine;
A post-theft antitheft device that is connectable to the work machine control device via the vehicle communication network and has the switching program and the operation program ;
An anti-theft system for work machines equipped with
The work machine control device includes:
Means for obtaining in the retrofit antitheft device is connected to a communication network for the vehicle, the switching program for realizing the switching means for switching the inhibit mode from the permission mode from the retrofit antitheft device,
When the retrofitting anti-theft device is connected to the vehicle communication network, an operation program that realizes an engine operating means for permitting the engine operation based on a command from the anti-theft device in the prohibit mode is the anti-theft anti-theft device. Means for obtaining from the device;
Have
The switching means switches from a permission mode to a prohibition mode after detecting the connection of the retrofitting antitheft device to the vehicle communication network,
The prohibit mode is a work machine anti-theft system that is retained even if the retrofit anti-theft device is removed from the vehicle communication network . The retrofitting anti-theft device includes a data communication device connectable to the vehicle communication network and having an identification code, and an external device capable of wireless communication with the data communication device and having an identification code,
During wireless communication between the data communication device and the external device, the identification code of the data communication device and the identification code of the external device are collated, and the switching program and the operation program that the external device has after the collation is established. The anti-theft system for work implements according to claim 3, wherein the anti-theft system is transmitted to the data communication device. The work engine antitheft system according to claim 3 or 4 , wherein the engine operating means permits engine start which is one of engine operations based on a command from the antitheft device.