Control systems for operating machinery

Abstract

A control system for a work machine is provided, which allows a worker working around the work machine to approach the work machine with peace of mind. The control system comprises: a work machine (1) having a work machine (7), a locking mechanism (14) of the work machine (7), a locking control device (13) for controlling the locking mechanism (14), and a communication device (20); and a communication terminal (30) capable of communicating with the communication device (20) of the work machine (1). The locking control device (13) controls the locking mechanism (14) so ​​that it cannot be released from a locked state if a locking request signal is received from the communication terminal (30), and controls the locking mechanism (14) so ​​that it can be released from a locked state if a locking request release signal is received from the communication terminal (30).

Description

Technical Field

[0001] The present invention relates to a control system for a work machine for allowing a worker working around the work machine to approach the work machine with peace of mind. Background Art

[0002] In order to prevent the operator from coming into contact with the operating machine, there is a known system that detects the approach of the operator and forcibly stops the operating machine. For example, by using electromagnetic waves, a stereo camera to detect the distance to the obstacle, or a method of detecting a moving object based on the image analysis of a camera, an obstacle is detected, and the operating machine is controlled based on the detected information to slow down or stop the operating machine, thereby preventing the operator from coming into contact with the operating machine. However, in the method of detecting obstacles, sometimes obstacles cannot be detected depending on the environment, making it difficult to completely prevent accidents. Therefore, as a method of reliably knowing the presence of the operator, there is a known method of sending information from a terminal held by the operator himself and performing control based on the information. According to the system described in Patent Document 1, the identification information of the intruder who has invaded the work site can be sent from a communication device possessed by the intruder, and the operating machine can be locked based on the identification information of the intruder and the distance between the operating machine and the intruder calculated from the signal strength, so that safety management can be reliably performed.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2017-82430 Summary of the Invention

[0006] Problems to be solved by the invention

[0007] In the above-mentioned prior art, whether to lock the working machine is determined solely based on identification information and the distance between the working machine and the intruder. This leads to the following problems. Since the intruder's intention to stop the working machine is not considered, and it is difficult to know how close the intruder is to the point where the machine will be locked, the working machine is sometimes locked unnecessarily. In addition, since the working machine is locked at a time that the operator of the working machine does not want, a secondary disaster may occur. Furthermore, if the intruder needs to approach the working machine, the intruder cannot reliably determine whether the working machine is locked or when the lock is released, and therefore cannot approach the working machine with peace of mind.

[0008] The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a control system for a work machine that allows an operator working around the work machine to approach the work machine with peace of mind.

[0009] Means for solving problems

[0010] In order to solve the above-mentioned problems, the control system of the working machine of the present invention comprises: a working machine, which has a working part, a locking mechanism that locks the working part so that it cannot move, a locking control device that controls the locking mechanism, and a communication device; and a communication terminal, which can communicate with the communication device of the working machine, and if the locking control device receives a locking request signal from the communication terminal requesting the locking mechanism to be in a locked state, the locking mechanism is controlled in such a manner that it cannot be released from the locked state, and if the locking control device receives a locking request release signal from the communication terminal to release the locking request signal of the locking mechanism, the locking mechanism is controlled in such a manner that it can be released from the locked state.

[0011] Effects of the Invention

[0012] According to the present invention, when an operator attempts to approach the work machine, the fact that the work machine is locked and cannot move can be notified, and the operator can confirm that the work machine is absolutely immobile, thereby allowing the operator to approach the work machine with peace of mind.

[0013] Other problems, structures, and effects than those described above will become clear from the following description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a diagram showing the appearance of a control system for a working machine according to a first embodiment.

[0015] Figure 2 It is a diagram showing a main configuration of a control system for a working machine according to a first embodiment.

[0016] Figure 3 1 is a diagram showing a control flow of the lock control device according to the first embodiment.

[0017] Figure 4 This is a diagram showing a control flow of the control unit of the communication terminal according to the first embodiment.

[0018] Figure 5 It is a diagram showing a main configuration of a control system for a working machine according to a second embodiment.

[0019] Figure 6 1 is a diagram showing a control flow of the lock control device according to the second embodiment.

[0020] Figure 7 This is a diagram showing a control flow of a control unit of a communication terminal according to the second embodiment.

[0021] Figure 8 It is a diagram showing a main configuration of a control system for a working machine according to a third embodiment.

[0022] Figure 91 is a diagram showing a control flow of the lock control device according to the third embodiment.

[0023] Figure 10 It is a diagram showing a main configuration of a control system for a working machine according to a fourth embodiment.

[0024] Figure 11 This is a diagram showing a control flow of a control unit of a communication terminal according to a fourth embodiment. DETAILED DESCRIPTION

[0025] The following describes an embodiment of the present invention using the accompanying drawings. In the various figures, parts having the same function are sometimes denoted by the same reference numerals, and repeated descriptions are omitted. In addition, in this embodiment, a hydraulic excavator is illustrated as an example of a working machine for description. However, as long as a working machine performing various operations, a rotating body performing a rotating action, or a traveling body performing a traveling action can be locked (decelerated or stopped) so as to be unable to move and can be unlocked, it is not limited to a hydraulic excavator and can of course be applied to all working machines such as wheel loaders, cranes, bulldozers, dump trucks, and road machinery.

[0026] [First embodiment]

[0027] Reference Figures 1 to 4 A first embodiment of a control system for a working machine according to the present invention will be described.

[0028] Figure 1 It is a diagram showing the appearance of a control system for a working machine according to a first embodiment of the present invention.

[0029] The present control system is configured to include a work machine 1 and a communication terminal 30. The work machine 1 has, for example, a lower traveling body 2 that travels by being driven by a crawler track, and an upper rotating body 3 that is rotatably provided on the lower traveling body 2. A work machine 7 consisting of a boom 4, an arm 5, and a bucket 6 for performing excavation operations, etc., is mounted on the upper rotating body 3 in a rotatable (tiltable) manner. In addition, an operating room (cab) 8 is provided on the upper rotating body 3, and the operating room is provided with a driver's seat, etc., where an operator who operates (makes the work machine 7 (the boom 4, arm 5, bucket 6) etc.) sits. The work machine 1 can communicate with the communication terminal 30 held by an operator who is performing operations around the work machine 1 via the communication network 40.

[0030] Figure 2 This is a diagram showing a main configuration of a control system for a working machine according to a first embodiment of the present invention.

[0031] (Structure of operating machinery)

[0032] The working machine 1 has a locking device 10 that locks the boom 4, arm 5, and bucket 6 of the working machine 7 so that they cannot move or unlock. The locking device 10 is composed of a locking lever 11, a locking switch 12, a locking control device 13, and a locking mechanism 14. The locking lever 11 is provided in the control room 8, for example, and can be operated by the operator in the control room 8. The locking lever 11 is connected in a manner that can switch the locking switch 12, and the signal of the locking switch 12 (a signal indicating the state of the locking switch 12) is transmitted to the locking control device 13. In addition, the locking control device 13 is configured to drive the locking mechanism 14 for locking the working machine 7 (making the working machine 7 unable to move or prohibiting it from moving). The operator operates the locking lever 11, thereby switching the locking switch 12. The locking control device 13 can control the driving state of the locking mechanism 14 according to the signal transmitted from the locking switch 12 (a signal indicating the locked state or the unlocked state of the locking switch 12). If the locking control device 13 receives a signal indicating a locked state from the locking switch 12, it drives the locking mechanism 14 (in other words, locks) and becomes a locked state. If it receives a signal indicating a locked release state from the locking switch 12, it does not drive the locking mechanism 14 (in other words, releases) and becomes a locked release state. In this way, the driving state of the locking mechanism 14 can be switched, that is, the locking and unlocking of the working machine 7.

[0033] Specifically, for example, when the working machine 7 is operated by a hydraulic actuator, the locking mechanism 14 is composed of a locking valve that blocks the supply of pressure oil to the hydraulic actuator or cuts off the control signal of the control valve that controls the pressure oil supplied to the hydraulic actuator.

[0034] The work machine 1 includes a communication device 20 for communicating with the outside via a communication network 40. The communication device 20 is composed of a communication control unit 21 and a receiving unit 22. The receiving unit 22 transmits information received from the outside (here, the transmitting unit 33 of the communication terminal 30) via the communication network 40 to the communication control unit 21. The communication control unit 21 can then send an instruction (signal) to the locking control device 13 based on the information received from the receiving unit 22.

[0035] (Structure of Communication Terminal)

[0036] The communication terminal 30 is composed of a control unit 31, an input device 34, a transmitter 33, and a recording unit 35. The communication terminal 30 allows an operator to input various information via the input device 34. The control unit 31 processes the information from the input device 34, and the processed information is communicated from the transmitter 33 to the receiver 22 of the communication device 20 via the communication network 40. The communication terminal 30 also includes a recording unit 35 for recording the information processed by the control unit 31. The information input via the input device 34 and transmitted (input) from the transmitter 33 of the communication terminal 30 to the receiver 22 of the communication device 20 via the communication network 40 includes a lock request signal (hereinafter sometimes referred to as a lock request) requesting the locking mechanism 14 to be locked (put into a locked state) and a lock request release signal (hereinafter sometimes referred to as a lock request release) requesting the locking mechanism 14 to be released (set the lock request to an unlocked state or cancel the lock request).

[0037] Although not shown in the figure, the lock control device 13 and control unit 31 are configured as a microcomputer (microcomputer) that includes a CPU (Central Processing Unit) that performs various calculations, a ROM (Read Only Memory) that stores programs used to execute the CPU's calculations, a storage device such as an HDD (Hard Disk Drive), and RAM (Random Access Memory) that serves as a work area for the CPU to execute programs. The various functions of the lock control device 13 and control unit 31 are implemented by the CPU loading various programs stored in the storage device into the RAM and executing them.

[0038] Furthermore, by utilizing this storage device, the recording unit 35 can also be omitted.

[0039] (Control flow of the locking control device)

[0040] Figure 3 1 is a diagram showing a control flow of the lock control device according to the first embodiment of the present invention.

[0041] In step S101a, it is confirmed whether a lock request for the lock mechanism 14 has been received from the communication terminal 30 (via the communication device 20). If there has been no lock request for the lock mechanism 14, the state of the lock switch 12 is confirmed in step S103a. If the lock switch 12 is in the locked state, the lock mechanism 14 is locked in step S104a. If the lock switch 12 is not in the locked state, the lock mechanism 14 is released in step S104b.

[0042] If a lock request is received from the lock mechanism 14 in step S101a (step S101a: Yes), a check is made in step S101b as to whether a lock release request from the lock mechanism 14 has been received (via the communication device 20) from the communication terminal 30. If a lock release request has not been received from the lock mechanism 14 (in other words, before a lock release request from the lock mechanism 14 has been received), the state of the lock switch 12 is checked in step S103b. If the lock switch 12 is in the locked state, the lock mechanism 14 is locked in step S104c. If the lock switch 12 is not in the locked state, the process ends immediately.

[0043] Thus, when a locking request of the locking mechanism 14 is notified from the communication terminal 30, the locking mechanism 14 can be put into a locked state by the locking rod 11. However, once the locking mechanism 14 is put into a locked state, the locking mechanism 14 cannot be released from the locked state even if the locking switch 12 is not put into a locked state by the locking rod 11 (step S103b: No).

[0044] Furthermore, when a lock request of the lock mechanism 14 is notified from the communication terminal 30, once the lock mechanism 14 is locked, the lock mechanism 14 cannot be released from the locked state even if the lock switch 12 is unlocked by the lock lever 11 (step S103b: No). Figure 3 In the example shown, when the lock switch 12 is not locked (step S103b: No), the state of the lock mechanism 14 follows the previously set state (maintains the previous state). That is, even if the lock switch 12 is not locked by the lock lever 11 (step S103b: No), if the lock mechanism 14 was previously released (in other words, in the previous process), the released state remains; if the lock mechanism 14 was locked, the locked state remains. Specifically, when a lock request for the lock mechanism 14 is notified from the communication terminal 30 (before a lock request for the lock mechanism 14 is received), the lock mechanism 14 can be locked by manual operation of the operator of the work machine 1. However, once the lock mechanism 14 is locked, it cannot be released from the locked state by manual operation of the operator of the work machine 1.

[0045] When there is a request to release the lock of the lock mechanism 14 in step S101b (step S101b: Yes), the processes of steps S103a, S104a, and S104b described above are executed.

[0046] Thus, when a request to release the lock of the lock mechanism 14 is notified from the communication terminal 30 , the lock mechanism 14 can be released from the locked state when, for example, the lock switch 12 is not locked by the lock lever 11 (step S103 a : No).

[0047] (Control Flow of the Control Unit of the Communication Terminal)

[0048] Figure 4 This is a diagram showing a control flow of the control unit of the communication terminal according to the first embodiment of the present invention.

[0049] In step S201a, it is checked whether a lock request operation has been made to the input device 34 (i.e., whether a lock request has been input). If a lock request operation has been made, a lock request is transmitted from the transmission unit 33 to (the communication device 20 of) the working machine 1 in step S202a. In step S205, it is checked whether a lock release operation has been made to the input device 34 (i.e., whether a lock release request has been input). If a lock release operation has been made, a lock release request is transmitted from the transmission unit 33 to (the communication device 20 of) the working machine 1 in step S206.

[0050] (Effect)

[0051] As described above, in the control system of the working machine of the first embodiment, there is: a working machine 1, which has a working machine 7, a locking mechanism 14 that locks the working machine 7 so that it cannot move, a locking control device 13 that controls the locking mechanism 14, and a communication device 20; and a communication terminal 30, which can communicate with the communication device 20 of the working machine 1, and if the locking control device 13 receives a locking request signal requesting the locking mechanism 14 to be in a locked state from the communication terminal 30, the locking mechanism 14 is controlled in a manner that cannot be released from the locked state; if the locking request release signal of the locking request signal for releasing the locking mechanism 14 is received from the communication terminal 30, the locking mechanism 14 is controlled in a manner that can be released from the locked state.

[0052] According to the control system for the working machine of the first embodiment described above, when a lock request has not been notified from the communication terminal 30, the locking mechanism 14 is in a state of operation in response to the movement of the locking lever 11. Conversely, when a lock request has been notified from the communication terminal 30, the locking mechanism 14 can be locked by the locking lever 11, but the locked state of the locking mechanism 14 cannot be released. As long as the lock request has not been released from the communication terminal 30 (before the release of the lock request has been notified), the locked state of the locking mechanism 14, i.e., the lock of the working machine 7, cannot be released. Therefore, the operator can approach the working machine 1 with peace of mind.

[0053] [Second embodiment]

[0054] Reference Figures 5 to 7 A second embodiment of the control system for a working machine according to the present invention will be described.

[0055] In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and the description will focus on the differences.

[0056] Figure 5 It is a diagram showing a main configuration of a control system for a working machine according to a second embodiment of the present invention.

[0057] (Structure of operating machinery)

[0058] The working machine 1 includes a transmitter 23 in the communication device 20 , and can transmit information of the working machine 1 via the communication network 40 .

[0059] (Structure of Communication Terminal Side)

[0060] The communication terminal 30 is provided with a receiving unit 32 and a display device 36 . The receiving unit 32 can receive information transmitted from the transmitting unit 23 of the communication device 20 , and the display device 36 can display the information received by the receiving unit 32 .

[0061] (Control flow of the locking control device)

[0062] Figure 6 1 is a diagram showing a control flow of a lock control device according to a second embodiment of the present invention.

[0063] In step S103b, the locking switch 12 is in a locked state (step S103b: yes), and after the locking mechanism 14 is locked in step S104c, the locking state of the locking mechanism 14 is notified to the communication terminal (specifically, the communication terminal that sent the locking request) 30 (the receiving unit 32) via the communication device 20 (the sending unit 23) in step S105.

[0064] (Control Flow of the Control Unit of the Communication Terminal)

[0065] Figure 7 This is a diagram showing a control flow of a control unit of a communication terminal according to the second embodiment of the present invention.

[0066] In step S203 , notification of the locked state of the locking mechanism 14 from the communication device 20 of the working machine 1 is confirmed. If there is notification of the locked state of the locking mechanism 14 , the locked state of the locking mechanism 14 is displayed on the display device 36 in step S204 .

[0067] (Effect)

[0068] As described above, in the control system of the working machine of the second embodiment, when the locking control device 13 receives the locking request signal from the communication terminal 30 and the locking mechanism 14 is in a locked state, the locking state is notified to the communication terminal 30 that sent the locking request signal via the communication device 20, and the communication terminal 30 has a display device (notification information display device) 36 for displaying the information notified from the locking control device 13.

[0069] According to the control system for the working machine of the second embodiment described above, after the operator issues a lock request from the communication terminal 30 , the operator is notified of the locking of the locking mechanism 14 via the communication device 20 . Therefore, it is possible to easily determine whether the working machine 1 is accessible.

[0070] [Third embodiment]

[0071] Reference Figure 8 、 Figure 9 A third embodiment of the control system for a working machine according to the present invention will be described.

[0072] In the following description, the same components as those in the second embodiment are denoted by the same reference numerals, and the description will focus mainly on the differences.

[0073] Figure 8 It is a diagram showing a main configuration of a control system for a working machine according to a third embodiment of the present invention.

[0074] The display device 24 and the input device 25 are connected to the communication control unit 21 of the communication device 20 , and information received by the communication control unit 21 can be displayed on the display device 24 and information inputted from the input device 25 can be inputted to the communication control unit 21 .

[0075] The display device 24 and input device 25 may be installed in the control room 8 of the work machine 1, or may be installed outside the work machine 1, such as in a control room or an operator's room during remote operation. Furthermore, the display device 24 and input device 25 may be separate or integrated.

[0076] (Control flow of the locking control device)

[0077] Figure 9 1 is a diagram showing a control flow of a lock control device according to a third embodiment of the present invention.

[0078] If a lock request is received from the locking mechanism 14 in step S101a (step S101a: Yes), and if a lock release request is not received from the locking mechanism 14 in step S101b (step S101b: No), the display device 24 displays the receipt of the lock request from the locking mechanism 14 via the communication control unit 21 in step S102. Furthermore, in step S106, the communication terminal 30 (specifically, the communication terminal that sent the lock request) is specified using the input device 25, and confirmation is made via the communication control unit 21 as to whether a lock request release delegation operation has been performed. If a lock request release delegation operation is performed by specifying the communication terminal 30 using the input device 25, the communication device 20 (the transmitting unit 23 thereof) notifies the communication terminal 30 (the communication terminal 30 specified by the input device 25) (the receiving unit 32 thereof) of the lock request release delegation in step S107.

[0079] The control unit 31 of the communication terminal 30 confirms the notification of the lock request release from the communication device 20 of the working machine 1, and displays the lock request release on the display device 36 (with the lock request release) when there is a notification of the lock request release. Figure 7 is the same as steps S203 and S204).

[0080] (Effect)

[0081] As described above, the control system for the working machine according to the third embodiment includes the display device (received information display device) 24 capable of displaying that the lock request signal has been received from the communication terminal 30 .

[0082] Furthermore, the control system for the working machine of the third embodiment includes an input device 25 for specifying the communication terminal 30 that has transmitted the lock request signal, and a function of notifying the communication terminal 30 specified by the input device 25 of the release of the lock request signal.

[0083] According to the control system for the working machine of the third embodiment described above, the display device 24 displays the fact that a lock request has been received from the communication terminal 30. Therefore, the operator of the working machine 1 can easily be informed that an operator intends to approach the working machine 1 and can appropriately lock the locking mechanism 14. Furthermore, when the operator of the working machine 1 wishes to release the lock request, the lock request release can be requested (notification of lock request release request), allowing appropriate response when the operator wishes to move the working machine 1 for reasons on the operator's side.

[0084] [Fourth embodiment]

[0085] Reference Figure 10 、 Figure 11 A fourth embodiment of the control system for a working machine according to the present invention will be described.

[0086] In the following description, the same reference numerals are given to the same components as those in the third embodiment, and the description will focus mainly on the differences.

[0087] Figure 10 It is a diagram showing a main configuration of a control system for a working machine according to a fourth embodiment of the present invention.

[0088] (Structure of Communication Terminal)

[0089] The control unit 31 of the communication terminal 30 is connected to a designation device 37 , and the designation device 37 can be used to designate a work machine 1 from among the plurality of work machines 1 to which a lock request for the locking mechanism 14 is to be transmitted.

[0090] (Control Flow of the Control Unit of the Communication Terminal)

[0091] Figure 11 This is a diagram showing a control flow of a control unit of a communication terminal according to a fourth embodiment of the present invention.

[0092] In step S201b, it is confirmed whether the work machine 1 to which the lock request of the locking mechanism 14 is to be transmitted has been specified using the specifying device 37. If the work machine 1 to which the lock request of the locking mechanism 14 is to be transmitted has been specified, in step S202b, the transmission unit 33 transmits the lock request of the locking mechanism 14 to (the communication device 20 of) the specified work machine 1.

[0093] (Effect)

[0094] As described above, in the control system for the working machine according to the fourth embodiment, the communication terminal 30 includes the specifying device 37 capable of specifying the working machine to which the lock request signal is to be transmitted from among the plurality of working machines 1 .

[0095] According to the control system of the working machine of the fourth embodiment described above, at a site where multiple working machines 1 exist, the operator can specify the working machine 1 that he wants to approach and send a lock request, so that working machines 1 other than the working machine that the operator wants to approach can continue to operate without being locked.

[0096] In the control systems of the working machines of the above-mentioned first to fourth embodiments, the situations in which the working machine serving as the working part for performing various operations is locked and unable to move or unlocked are described in detail. However, for example, in the case of locking or unlocking the lower traveling body 2 and the upper rotating body 3, the control systems of the working machines of the above-mentioned embodiments can also be applied. This point does not need to be explained in detail. The lower traveling body 2 performs a traveling action by driving a traveling motor composed of a hydraulic actuator, and the upper rotating body 3 performs a rotating action by driving a rotating motor composed of a hydraulic actuator.

[0097] In the above-described first to fourth embodiments, the control systems for working machines are assumed to be mounted on the working machine 1 . However, the control system for working machines of the present invention is not limited to being mounted on the working machine 1 .

[0098] In the control systems for working machines of the first to fourth embodiments described above, an operator operates the locking mechanism 14 of the working machine 1 . However, the working machine 1 may be an automatic or unmanned machine and the locking mechanism 14 may be controlled.

[0099] In the control systems for working machines according to the first to fourth embodiments described above, the operator issues a lock request. However, the lock request may be issued from another machine or system control.

[0100] The present invention is not limited to the above-described embodiment, and includes various modifications. The above-described embodiment is described in detail to easily explain the present invention, and is not limited to having all the described structures.

[0101] In addition, the various functions of the controller of the above-mentioned embodiment can also be implemented by hardware, for example, by designing part or all of them into an integrated circuit. Alternatively, they can be implemented by software by having a processor interpret and execute programs that implement each function. In addition to the storage device within the controller, the information such as the programs, tables, and files that implement each function can also be placed on a recording device such as a hard disk or SSD (Solid State Drive), or a recording medium such as an IC card, SD card, or DVD.

[0102] Description of Reference Numerals

[0103] 1: Operating machinery

[0104] 2: Lower traveling body (working part)

[0105] 3: Upper rotating body (working part)

[0106] 4: Boom

[0107] 5: Stick

[0108] 6: Bucket

[0109] 7: Operation machine (operation department)

[0110] 8: Control Room

[0111] 10: Locking device

[0112] 11: Locking lever

[0113] 12: Lock switch

[0114] 13: Locking control device

[0115] 14: Locking mechanism

[0116] 20: Communication device

[0117] 21: Communication Control Unit

[0118] 22: Receiving Department

[0119] 23: Sending Department

[0120] 24: Display device (received information display device) 25: Input device

[0121] 30: Communication terminal

[0122] 31: Control Department

[0123] 32: Receiving Department

[0124] 33: Sending Department

[0125] 34: Input device

[0126] 35: Records Department

[0127] 36: Display device (notification information display device) 37: Designation device 40: Communication network.

Claims

1. A control system for an operating machine, The control system of the working machine has: A working machine comprising a working unit, a locking mechanism for locking the working unit so as to be unable to operate, a lock switch that can be switched by operation of a lock lever, a lock control device for controlling the locking mechanism based on a signal received from the lock switch, and a communication device; and a communication terminal capable of communicating with the communication device of the working machine, It is characterized in that The lock control device controls the lock mechanism to maintain the locked state in a manner that the lock mechanism cannot be released from the locked state even if a signal indicating a lock release state is received from the lock switch, before receiving a lock request release signal for releasing the lock request signal from the communication terminal. In a case where the lock request release signal for releasing the lock mechanism is received from the communication terminal, the lock control device controls the lock mechanism to maintain the locked state in a manner that the lock mechanism cannot be released from the locked state if a signal indicating a lock release state is received from the lock switch.

2. The control system for a working machine according to claim 1, wherein: When the lock control device receives the lock request signal from the communication terminal and the lock mechanism is in the locked state, the lock control device notifies the communication terminal that sent the lock request signal of the locked state via the communication device, and the communication terminal includes a notification information display device that displays the information notified from the lock control device.

3. The control system for a working machine according to claim 1, wherein: The working machine includes a reception information display device capable of displaying that the lock request signal is received from the communication terminal.

4. The control system for a working machine according to claim 3, wherein: The control system includes an input device for specifying the communication terminal that has transmitted the lock request signal, and has a function of notifying the communication terminal specified by the input device of the release of the lock request signal.

5. The control system for a working machine according to claim 1, wherein: The communication terminal includes a specifying device capable of specifying a working machine that transmits the lock request signal from among a plurality of working machines.

Images