JP2020045714A - Work machine - Google Patents

Abstract

To provide a work machine capable of improving operability of a touch panel-type display device.SOLUTION: A work machine comprises a vehicle body controller 51 capable of switching an operation of a directional control valve 45 by a control lever 44 between being enabled and disabled. The vehicle body controller obtains a display state of a display device 54 via a display controller 52. When the display device is not in a predetermined display state, the operation of the directional control valve by the control lever is enabled. When the display device is in the predetermined display state, the operation of the directional control valve by the control lever is disabled.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a work machine provided with a touch panel display device.

  2. Description of the Related Art A working machine such as a hydraulic shovel performs various operations by an operator operating the working machine via an operation lever. Such a working machine is equipped with a monitor that displays various states of the machine itself and information outside the machine (for example, an image obtained by a rear monitoring camera). Switching of information displayed on the monitor and input of various machine setting information are performed by operating an input device (for example, a button or a rotary switch) independent of the monitor.

  In addition, some work machines include not only a display device having a monitor independent of such an input device but also a touch panel display device capable of operating the monitor by directly touching the display screen of the monitor ( For example, see Patent Document 1). The touch panel display device has the advantage that it is not necessary to separately provide an input device, and that the operation becomes easy depending on the information to be displayed. For this reason, the touch-panel display device can display and input complex information, such as displaying and setting not only various information about the work machine and information outside the machine, but also information about the construction that the work machine is going to perform. It is suitable for a machine guidance device that is frequently performed (for example, see Patent Document 2).

Patent No. 6292617

Patent No. 6297468

  In a work machine equipped with such a touch panel display device, an operator operates a work machine by operating an operation lever to perform a desired work, and operates a touch panel as necessary to operate machine information or construction information. Settings and display.

  Here, the operation of the touch panel may be erroneous, for example, if the touch position on the touch panel is slightly different, for example, a button different from the button intended by the operator may be operated. There is. Therefore, it is desirable that the operator can concentrate on the operation of the touch panel. However, the operator needs to pay attention to the operation lever so that an unintended lever operation is not performed during operation of the touch panel, for example, a part of the body touches the operation lever. As a result, the operator cannot concentrate on the operation of the touch panel, and the operability of the touch panel display device may be reduced.

  The input control method of the work machine touch panel monitor described in Patent Document 1 enables a monitor input operation on the touch panel by releasing a hydraulic lock state by a hydraulic lock switch while enabling a monitor screen display when the work machine is operable. Prevents erroneous operation input to the touch panel by controlling the monitor input lock state to disable it and controlling to release the monitor input lock state by a specific monitor input lock release operation on the touch panel and switch to the input operation screen display. I'm trying.

  However, in this method, when the monitor input lock state is released by a specific monitor input lock release operation after releasing the hydraulic lock state, both the touch panel monitor and the operation lever become operable. Can not.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a working machine capable of improving the operability of a touch panel display device.

  In order to achieve the above object, the present invention provides a working machine, an actuator for driving the working machine, a hydraulic pump, and a directional control valve for controlling a flow of pressure oil supplied from the hydraulic pump to the actuator. An operation lever for operating the work machine, a display device having a touch panel, and a display controller for controlling the display device, wherein the operation of the directional control valve by the operation lever is enabled or disabled. The vehicle controller obtains a display state of the display device via the display controller, and when the display device is not in a predetermined display state, the direction by the operation lever is provided. When the operation of the control valve is enabled and the display device is in the predetermined display state, the directional control valve is operated by the operation lever. It is assumed that to invalidate the operation.

  According to the present invention configured as described above, when the display device is in the predetermined display state, the operation of the direction control valve by the operation lever becomes impossible. This eliminates the need for the operator to pay attention to the operation lever while operating the touch panel, thereby improving the operability of the touch panel display device.

  According to the working machine of the present invention, it is possible to improve the operability of the touch panel display device.

1 is a perspective view of a hydraulic shovel according to a first embodiment of the present invention. FIG. 2 is a schematic configuration diagram of a hydraulic control system mounted on the hydraulic shovel illustrated in FIG. 1. It is a perspective view which shows the inside of the cab shown in FIG. FIG. 4 is a diagram showing a display example of a guidance monitor shown in FIG. 3. FIG. 3 is a functional block diagram of a vehicle controller, a guidance controller, and a guidance monitor shown in FIG. 2. FIG. 3 is a diagram illustrating a control flow of a vehicle body controller, a guidance controller, and a guidance monitor illustrated in FIG. 2. FIG. 11 is a diagram illustrating a control flow of a vehicle body controller, a guidance controller, and a guidance monitor according to the second embodiment of the present invention. It is a schematic structure figure of a hydraulic control system in a 3rd example of the present invention.

  Hereinafter, a hydraulic shovel will be described as an example of a working machine according to an embodiment of the present invention, and description will be given with reference to the drawings. In each of the drawings, the same reference numerals are given to the same members, and the repeated description will be appropriately omitted.

  FIG. 1 is a perspective view of a hydraulic shovel according to a first embodiment of the present invention.

  In FIG. 1, a hydraulic excavator 1 according to the present embodiment includes an upper swing body 11, a lower traveling body 12 including a crawler, and a work machine 4 for performing operations such as excavation.

  The work machine 4 includes a boom 13, an arm 14, a bucket 15, bucket links 16 and 17 that form a four-bar linkage with the arm 14 and the bucket 15, a boom cylinder 18 a that drives the boom 13, and the arm 14. It has an arm cylinder 18b for driving, and a bucket cylinder 18c for driving the bucket 15 via bucket links 16,17. Hereinafter, the boom cylinder 18a, the arm cylinder 18b, and the bucket cylinder 18c are collectively referred to as a hydraulic cylinder 18 as appropriate.

  The upper revolving unit 11 is rotatably supported by the lower traveling unit 12, and is rotationally driven with respect to the lower traveling unit 12 by a turning hydraulic motor 19 (shown in FIG. 2).

  The base end of the boom 13 is rotatably supported by the upper swing body 11. The bottom end of the boom cylinder 18a is rotatably supported by the upper swing body 11, and the rod-side end of the boom cylinder 18a is rotatably supported by an intermediate portion of the boom 13. The boom 13 is driven to rotate with respect to the upper swing body 11 according to the expansion and contraction of the boom cylinder 18a.

  The proximal end of the arm 14 is rotatably supported by the distal end of the boom 13. The bottom end of the arm cylinder 18 b is rotatably supported at the middle of the boom 13, and the rod end of the arm cylinder 18 b is rotatably supported at the base end of the arm 14. The arm 14 is driven to rotate with respect to the boom 13 according to the expansion and contraction of the arm cylinder 18b.

  The base end of the bucket 15 and one end of the bucket link 16 are rotatably supported by the tip of the arm 14. The other end of the bucket link 16 is rotatably supported by one end of the bucket link 17, and the other end of the bucket link 17 is rotatably supported by the base end of the bucket 15. A bottom end of the bucket cylinder 18c is rotatably supported by a base end of the arm 14, and a rod-side end of the bucket cylinder 18c is rotatably supported by a connecting portion of the bucket links 16, 17. I have. Thus, the arm 14, the bucket links 16, 17 and the bucket 15 constitute a four-bar linkage. The bucket 15 is driven to rotate with respect to the boom 13 according to the expansion and contraction of the bucket cylinder 18c.

  The hydraulic excavator 1 configured as described above can drive the boom cylinder 18a, the arm cylinder 18b, and the bucket cylinder 18c to drive the bucket 15 to an arbitrary position and posture to perform desired work such as excavation. it can.

  Two GNSS (Global Navigation Satellite System, Global Navigation Satellite System) antennas 2a and 2b are arranged on the upper revolving superstructure 11. Hereinafter, the antennas 2a and 2b are collectively referred to as a GNSS antenna 2 as appropriate. GNSS refers to a satellite positioning system that receives signals from a plurality of satellites with an antenna and measures the position of the antenna on the earth. The GNSS antenna 2 receives signals (radio waves) from a plurality of GNSS satellites (not shown) located above the earth, and transmits the obtained signals to a GNSS controller 53 (shown in FIG. 2). The GNSS controller 53 calculates the positions of the GNSS antennas 2a and 2b from these signals. There are various types of satellite positioning methods, and the present invention is not limited to these. For example, a method called RTK-GNSS (Real Time Kinetic-GNSS) that receives correction information from a reference station including a GNSS antenna installed at the site and acquires the self-position with higher accuracy may be used. In this case, the excavator 1 needs a receiver for receiving the correction information from the reference station, but the self-position of the antenna 2 can be measured more accurately.

  The position (for example, latitude, longitude, and altitude) of the two GNSS antennas 2a and 2b on the earth is obtained by the GNSS controller 53. If the position of the GNSS antenna 2 is provided in advance at the position of the upper revolving structure 11, the position of the upper revolving structure 11 on the earth can be obtained by calculating backward from the position of the GNSS antenna 2. it can. Here, since two GNSS antennas are mounted, it is possible to know the direction of the upper swing body 11 (in which direction the boom 13, the arm 14, and the bucket 15 are facing).

  A vehicle body IMU 3a (Inertial Measurement Unit, inertial measurement device) for measuring the inclination of the upper swing body 11 is attached to the upper swing body 11. Similarly, the boom 13 has a boom IMU 3b for measuring the inclination of the boom 13, the arm 14 has an arm IMU 3c for measuring the inclination of the arm 14, and the bucket link 16 has a boom IMU 3b for measuring the inclination of the bucket link 16. The bucket IMU 3d is attached. Hereinafter, the IMUs 3a to 3d are collectively referred to as an IMU 3 as appropriate. The IMU 3 is a sensor unit that can measure acceleration and angular velocity, and can know the self-posture of the IMU 3 based on such information. For this reason, it is possible to know the front and rear inclination and the left and right inclination of the upper revolving unit 11 from the information from the vehicle body IMU 3a, and to know the rotation posture of the boom 13 from the information from the boom IMU 3b and the rotation posture of the arm 14 from the information from the arm IMU 3c. be able to. Further, the rotation posture of the bucket link 16 can be known from the information from the bucket IMU 3d, and is based on the rotation posture of the arm 14 and the dimensional information of the four-bar linkage including the arm 14, the bucket links 16, 17 and the bucket 15. , The rotation posture of the bucket 15 can be known.

  In this way, it is possible to know the position, the azimuth, the front-back inclination, and the left-right inclination of the upper revolving unit 11, and it is possible to determine at which position on the earth and in which posture the upper revolving unit 11 is located. In addition, if the dimensional information of each of the boom 13, the arm 14, and the bucket 15 is available, the position of the bucket toe 15a with respect to the upper rotating body 11 can be known. That is, it is possible to determine at which position on the earth and in which posture the work implement 4 including the bucket 15 exists.

  FIG. 2 is a schematic configuration diagram of a hydraulic control system mounted on the excavator 1.

  2, the hydraulic control system 100 includes an engine 41, a hydraulic pump 43, a pilot pump 42, a direction control valve 45, a boom cylinder 18a, an arm cylinder 18b, a bucket cylinder 18c, a swing hydraulic motor 19, Arm operating lever 44a, boom operating lever 44b, bucket operating lever 44c, turning operating lever 44d, vehicle body controller 51, oil pressure sensors 49a to 49i, shutoff valve 46, GNSS antennas 2a and 2b, GNSS A controller 53, a guidance controller 52, a vehicle body IMU 3a, a boom IMU 3b, an arm IMU 3c, a bucket IMU 3d, a guidance monitor 54, and an alarm 55 are provided. Hereinafter, the arm operation lever 44a, the boom operation lever 44b, the bucket operation lever 44c, and the turning operation lever 44d are collectively referred to as an operation lever 44.

  The hydraulic pump 43 is driven by the engine 41 and supplies pressure oil to the actuators 18 a to 18 c and 19 via the direction control valve 45. The direction control valve 45 is operated by the pilot pressure output from the operation lever 44 and controls the direction and flow rate of the pressure oil supplied from the hydraulic pump 43 to the actuators 18 a to 18 c and 19. Thus, the operator operates the operation lever 44 to drive the actuators 18a to 18c and 19, thereby operating the work implement 4 to an arbitrary posture and performing a desired operation.

  The pilot pump 42 is driven by the engine 41 and supplies pressurized oil (primary pilot pressure) to the operation lever 44 via the pilot oil passage 21i. The operation lever 44 is operated by an operator, and reduces the pilot primary pressure supplied from the pilot pump 42 in accordance with the lever operation, and outputs the reduced pressure as pilot pressure. The pilot pressure output from the operation lever 44 is guided to an operation unit (not shown) of the direction control valve 45 via the pilot oil passages 21a to 21h. Hydraulic pressure sensors 49a to 49h are provided in pilot oil passages 21a to 21h. The signals output from the oil pressure sensors 49a to 49h are input to the vehicle body controller 51.

  A shutoff valve 46 is provided in the pilot oil passage 21i that connects the pilot pump 42 and the operation lever 44. When the shut-off valve 46 is closed, the pilot primary pressure from the pilot pump 42 is not supplied to the operation lever 44, and the pilot pressure does not act on the operation portion of the direction control valve 45 regardless of the operation of the operation lever 44. As a result, the supply of pressure oil from the hydraulic pump 43 to the actuators 18a to 18c and 19 becomes impossible, and the aircraft cannot be operated. The shut-off valve 46 may be mechanically driven by a lock lever (not shown) or the like, or may be electrically driven by the vehicle body controller 51 as shown in FIG. A hydraulic pressure sensor 49i is provided downstream of the shutoff valve 46 in the pilot oil passage 21i. The signal output from the hydraulic pressure sensor 49i is input to the vehicle body controller 51.

  The GNSS antennas 2a and 2b transmit signals received from GNSS satellites to the GNSS controller 53. The GNSS controller 53 calculates the positions (for example, latitude, longitude, and altitude) of the GNSS antennas 2a and 2b on the earth based on signals from a plurality of GNSS satellites, and transmits the result to the guidance controller 52.

  The guidance controller 52 is connected with a vehicle body IMU 3a, a boom IMU 3b, an arm IMU 3c, a bucket IMU 3d, a guidance monitor 54, and an alarm 55. The IMU 3 transmits measurement results such as acceleration and angular velocity to the guidance controller 52. The guidance controller 52 calculates the front and rear inclination, the left and right inclination, the rotation posture of the boom 13, the rotation posture of the arm 14, and the rotation posture of the bucket 15 based on the information input from the IMU 3.

  The guidance controller 52 stores design data indicating a target shape to be constructed, and transmits to the guidance monitor 54 information such as the design data, the posture of the work implement 4, and the relative positional relationship between the bucket toe 15a and the target shape. . The guidance monitor 54 can display information input from the guidance controller 52. The operator operates the work implement 4 based on the information displayed on the guidance monitor 54 so that the distance between the target shape and the bucket tip 15a is always zero, for example, so that the target shape conforms to the design data. Excavation work can be performed.

  Further, the guidance controller 52 can also use the alarm 55 to transmit the relative positional relationship between the target shape and the bucket toe 15a to the operator based on the intensity of the sound or a change in the tone. Accordingly, the operator can perceive a change in the sound from the alarm 55 without watching the guidance monitor 54, and operate the work implement 4 such that the distance between the target shape and the bucket toe 15a is always zero, for example. Can be operated.

  FIG. 3 is a perspective view showing the inside of the cab 5.

  3, the operation lever 44 is disposed on the left and right of the driver's seat 6 on which the operator sits, and the guidance monitor 54 is disposed on the front right side of the driver's seat 6. The guidance monitor 54 is configured by a touch panel display device, and has a touch panel 54a as operation input means. As shown in FIG. 3, since the operation lever 44 and the guidance monitor 54 are arranged near the driver's seat 6, there is a possibility that a part of the operator's body may come into contact with the operation lever 44 during operation of the touch panel 54a. is there.

  FIG. 4 is a diagram illustrating a display example of the guidance monitor 54.

  The guidance monitor 54 includes a basic screen (FIG. 4A) for displaying information such as the design data, the posture of the work implement 4, the relative positional relationship between the bucket toe 15a and the target shape, and the setting of the bucket 15 and the design data. It has a setting screen (FIG. 4B) for setting and various system settings. These screens are switched by the operator operating the touch panel 54a. In addition, it has a startup screen and an initial screen (not shown) displayed from when the guidance monitor 54 is turned on until a transition to the basic screen, and an end screen (not shown) displayed when the guidance monitor 54 ends. These screens are automatically displayed, for example, when the engine 41 starts or ends.

  FIG. 5 is a functional block diagram of the vehicle body controller 51, the guidance controller 52, and the guidance monitor 54.

  In FIG. 5, the vehicle body controller 51 includes a lever operation determination unit 51a, a lever operation invalidation instruction unit 51b, and a shutoff valve control unit 51c. The guidance controller 52 includes a monitor operation invalidation instructing unit 52a and a monitor operation state transmitting unit 52b. The guidance monitor 54 has a monitor display state determination unit 54b and a monitor operation invalidation 54c. Hereinafter, the function of each unit will be described with reference to FIG.

  FIG. 6 is a diagram showing a control flow of the vehicle body controller 51, the guidance controller 52, and the guidance monitor 54.

  First, a control flow of the vehicle body controller 51 will be described.

  First, the lever operation determination unit 51a of the vehicle body controller 51 determines whether or not a lever operation is being performed (step S10). In step S10, specifically, if the pressure obtained from the oil pressure sensors 49a to 49h is larger than the threshold value, it is determined that the lever is being operated.

  If it is determined in step S10 that the lever operation is being performed (Yes), the lever operation determination unit 51a sends information (lever operation state) that can determine that the lever operation is being performed to the monitor operation invalidation instruction unit 52a of the guidance controller 52. The control flow is transmitted (step S11), and the control flow ends.

  When it is determined in step S10 that the lever is not being operated (No), the lever operation determination unit 51a transmits a lever operation state that can determine that the lever is not being operated to the monitor operation invalidation instruction unit 52a (step S12). ).

  Subsequent to step S12, the lever operation invalidation instructing section 51b of the vehicle body controller 51 receives information (monitor display state) from the monitor operation state transmitting section 52b of the guidance controller 52 that can determine whether or not the setting screen is being displayed (step S12). S13).

  Subsequent to step S13, the lever operation invalidation instructing unit 51b determines whether or not the setting screen is being displayed based on the monitor display state received from the monitor operation state transmitting unit 52b (step S14).

  When it is determined in step S14 that the setting screen is being displayed (Yes), the lever operation invalidation instructing unit 51b invalidates the lever operation (step S15), and ends the control flow. In step S15, specifically, the shutoff valve control unit 51c closes the shutoff valve 46 by sending a command current to the shutoff valve 46 so that the shutoff valve closes, and the pilot primary pressure from the pilot pump 42 is applied to the operation lever 44. Do not work. Thus, even if a part of the operator's body touches the operation lever 44 during operation of various settings or the like via the touch panel 54a, the machine does not operate. As a result, the operator can concentrate on the operation of the touch panel 54a, so that the operability of the guidance monitor 54 can be improved.

  If it is determined in step S14 that the operation is not in the monitor setting screen (No), the lever operation invalidation instructing unit 51b ends the control flow without invalidating the lever operation.

  Next, a control flow of the guidance controller 52 will be described.

  First, the monitor operation invalidation instruction unit 52a of the guidance controller 52 receives a lever operation state from the lever operation determination unit 51a of the vehicle body controller 51 (Step S20).

  Subsequent to step S20, the monitor operation invalidation instructing unit 52a determines whether or not the lever is being operated based on the lever operation state received from the lever operation determining unit 51a (step S21).

  If it is determined in step S21 that the lever operation is being performed (Yes), the monitor operation invalidation instructing unit 52a outputs a signal (monitor operation invalidation instruction) for instructing the operation on the touch panel 54a to invalidate the monitor operation of the guidance monitor 54. Is transmitted to the conversion unit 54c (step S22).

  Subsequent to step S22, or when it is determined in step S21 that the lever is not operated (No), the monitor operation state transmitting unit 52b of the guidance controller 52 changes the monitor display state from the monitor display state determination unit 54b of the guidance monitor 54. Receive (Step S23).

  Subsequent to step S23, the monitor operation state transmission unit 52b transmits the monitor display state received from the monitor display state determination unit 54b to the lever operation invalidation instruction unit 51b of the vehicle body controller 51 (step S24), and ends the control flow. .

  Next, a control flow of the guidance monitor 54 will be described.

  First, the monitor operation invalidating unit 54c of the guidance monitor 54 receives a monitor operation invalidating instruction from the monitor operation invalidating instruction unit 52a of the guidance controller 52 (Step S30).

  Subsequent to step S30, the monitor operation invalidation unit 54c determines whether or not there is a monitor operation invalidation instruction (step S31).

  If it is determined in step S31 that the monitor operation invalidation instruction is present (Yes), the monitor operation invalidation unit 54c determines whether the monitor setting screen is being displayed (step S32).

  When it is determined in step S32 that the monitor setting screen is being displayed (Yes), the monitor operation invalidating unit 54c invalidates the input operation on the touch panel 54a (step S33), and ends the control flow. Thus, when performing a setting operation on the touch panel 54a while operating the aircraft, it is possible to prevent the aircraft from suddenly stopping unintentionally, and to perform a setting operation by performing the setting operation of the guidance monitor 54 while operating the aircraft. Erroneous operation or erroneous input can be avoided. When the operation of the operation lever 44 is stopped from this state, as described above, the vehicle body controller 51 closes the shutoff valve 46 so as not to accept the operation of the operation lever 44, and validates the input operation to the touch panel 54a.

  If it is determined in step S32 that the monitor setting screen is not being displayed (No), the monitor operation invalidating unit 54c ends the control flow without invalidating the input operation on the touch panel 54a.

  If it is determined in step S31 that there is no monitor operation invalidation instruction (No), the monitor display state determination unit 54b determines whether or not the monitor setting screen is being displayed (step S34).

  When it is determined in step S34 that the monitor setting screen is being displayed (Yes), the monitor display state determining unit 54b transmits the monitor display state (during display of the setting screen) to the monitor operation state transmitting unit 52b of the guidance controller 52 (step S34). S35), the control flow ends.

  If it is determined in step S34 that the monitor setting screen is not being displayed (No), the monitor display state determination unit 54b transmits the monitor display state (while the non-setting screen is being displayed) to the monitor operation state transmission unit 52b of the guidance controller 52. (Step S36), the control flow ends.

  In the present embodiment, the work implement 4, the actuators 18 a to 18 c, 19 for driving the work implement 4, the hydraulic pump 43, and the flow of pressure oil supplied from the hydraulic pump 43 to the actuators 18 a to 18 c, 19 are controlled. In the work machine 1 including the direction control valve 45, the operation lever 44 for operating the work machine 4, the display device 54 having the touch panel 54a, and the display controller 52 for controlling the display device 54, the operation lever 44 The vehicle controller 51 includes a vehicle controller 51 capable of switching operation of the directional control valve 45 between valid and invalid. The vehicle controller 51 acquires a display state of the display device 54 via the display controller 52, and the display device 54 operates in a predetermined display state. If not, the operation of the direction control valve 45 by the operation lever 44 is enabled, and the display device 54 is in the predetermined display state. If, to invalidate the operation of the directional control valve 45 with the operating lever 44.

  According to the hydraulic shovel according to the present embodiment configured as described above, when the display device 54 is in the predetermined display state, the operation of the direction control valve 45 by the operation lever 44 becomes impossible. This eliminates the need for the operator to pay attention to the operation lever 44 while operating the touch panel 54a, so that the operability of the touch panel display device 54 can be improved.

  Further, the vehicle body controller 51 acquires the operation state of the operation lever 44, and when the operation lever 44 is not operated, enables an input operation on the touch panel 54a. When the operation lever 44 is operated, the touch panel 54a Invalidates the input operation for. This makes it possible to prevent the display state of the display device 54 from being unintentionally switched while the operation lever 44 is being operated, or from being unintentionally changed from the machine information or the construction information.

  The display device 54 is configured to display any one of a plurality of display screens in response to an input operation on the touch panel 54a, and the vehicle controller 51 determines whether a predetermined display screen is not displayed on the display device 54. Makes the operation of the direction control valve 45 by the operation lever 44 valid, and invalidates the operation of the direction control valve 45 by the operation lever 44 when a predetermined display screen is displayed on the display device 54. Thus, when a predetermined display screen (for example, a setting screen) is displayed on the display device 54, it is possible to prevent an unintended lever operation.

  The operating lever 44 is configured by a hydraulic lever that outputs the pilot pressure of the direction control valve 45 by reducing the pilot primary pressure according to the lever operation, and the work machine 1 supplies the pilot primary pressure to the hydraulic lever 44. And a shut-off valve 46 provided in a pilot oil passage 21i that connects the pilot pump 42 and the hydraulic lever 44. The vehicle controller 51 sets the touch panel 54a to a predetermined display state when the touch panel 54a is not in a predetermined display state. The shutoff valve 46 is opened to supply the pilot primary pressure to the hydraulic lever 44, and when the display device 54 is in the predetermined display state, the shutoff valve 46 is closed to stop the supply of the pilot primary pressure to the hydraulic lever 44. . Thereby, when the display device 54 is in the predetermined display state, the operation of the direction control valve 45 by the hydraulic lever 44 becomes impossible. As a result, the operator does not need to pay attention to the hydraulic lever 44 while operating the touch panel 54a, so that the operability of the touch panel display device 54 can be improved.

  A hydraulic excavator 1 according to a second embodiment of the present invention will be described focusing on differences from the first embodiment.

  FIG. 7 is a diagram illustrating a control flow of the vehicle body controller 51, the guidance controller 52, and the guidance monitor 54 in the present embodiment. 7, the difference from the first embodiment (shown in FIG. 6) is that step S32 is omitted.

  The guidance monitor 54 according to the present embodiment, upon receiving the operation invalidation instruction from the guidance controller 52, invalidates the input operation on the touch panel 54a regardless of its own display state (step S33). As a result, during the operation of the operation lever 44, all operations on the touch panel 54a are invalidated.

  According to the hydraulic shovel 1 according to the present embodiment configured as described above, since the operation lever 44 and the touch panel 54a cannot be operated at the same time, the operator can concentrate on each operation of the operation lever 44 and the touch panel 54a. Becomes possible.

  Further, in the configuration of the first embodiment, the screen of the guidance monitor 54 can be switched from a screen other than the setting screen to the setting screen even while the operation lever 44 is being operated. Is invalidated, but the configuration of the present embodiment can also prevent the user from unintentionally switching from a screen other than the setting screen to the setting screen during the operation of the operation lever 44, so that necessary guidance information cannot be obtained.

  A description will be given of a hydraulic shovel 1 according to a third embodiment of the present invention, focusing on differences from the first embodiment.

  FIG. 8 is a schematic configuration diagram of a hydraulic control system mounted on the excavator 1 according to the present embodiment.

  In FIG. 8, the arm operation lever 50a, the boom operation lever 50b, the bucket operation lever 50c, and the turning operation lever 50d are configured by electric levers that output electric signals according to the lever operation. Hereinafter, the arm operation lever 50a, the boom operation lever 50b, the bucket operation lever 50c, and the turning operation lever 50d are collectively referred to as an electric lever 50. The electric signal output from the electric lever 50 is input to the vehicle body controller 51.

  The pilot oil passage 21i connected to the pilot pump 42 is connected to the operation unit of the direction control valve 45 via the pilot oil passages 21a to 21h. The shutoff valve 46 and the oil pressure sensor 49i (shown in FIG. 3) are not provided in the pilot oil passage 21i, and the pilot oil passages 21a to 21h are provided with pressure reducing valves 47a to 47h. The degree of opening of the pressure reducing valves 47 a to 47 h is controlled according to a command current supplied from the vehicle body controller 51.

  The vehicle controller 51 determines a target value (target pilot pressure) of the pilot pressure applied to the operating portion of the direction control valve 45 in accordance with the electric signal from the electric lever 50, and the primary pilot pressure of the pilot pump 42 is used as the target pilot pressure. A command current is supplied to the pressure reducing valves 47a to 47h so that the pressure is reduced to the pressure. Thereby, the pilot pressure according to the lever operation of the electric lever 50 acts on the operation part of the direction control valve 45.

  The hydraulic excavator 1 according to the present embodiment includes pressure reducing valves 47a to 47h that reduce the pilot primary pressure supplied from the pilot pump 42 and output the pilot pressure of the direction control valve 45. When the display device 54 is not in the predetermined display state, the vehicle controller 51 opens the pressure reducing valves 47 a to 47 h in response to the electric signal input from the operation lever 44. When the display device 54 is in the predetermined display state, the openings of the pressure reducing valves 47a to 47h are set to zero regardless of the electric signal input from the operation lever 44.

  According to the present embodiment configured as described above, when the display device 54 is in the predetermined display state, the operation of the direction control valve 45 by the electric lever 50 becomes impossible. This eliminates the need for the operator to pay attention to the electric lever 50 while operating the touch panel 54a, so that the operability of the display device 54 can be improved.

  Further, by controlling whether or not the vehicle body controller 51 sends a command such as a current or a voltage to the pressure reducing valves 47 a to 47 h according to the display state of the guidance monitor 54, the operation of the direction control valve 45 by the electric lever 50 becomes impossible. Therefore, there is no need to provide the shutoff valve 46 in the pilot oil passage 21i, and the configuration of the hydraulic control system 100 can be further simplified.

  As described above, the embodiments of the present invention have been described in detail. However, the present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described above. It is also possible to add a part of the configuration of another embodiment to the configuration of a certain embodiment, delete a part of the configuration of one embodiment, or replace it with a part of another embodiment. It is possible.

  DESCRIPTION OF SYMBOLS 1 ... Hydraulic excavator, 2 ... GNSS antenna, 2a, 2b ... GNSS antenna, 3 ... IMU, 3a ... Body IMU, 3b ... Boom IMU, 3c ... Arm IMU, 3d ... Bucket IMU, 4 ... Working machine, 5 ... Cab, 6: Driver's seat, 11: Upper revolving unit, 12: Lower traveling unit, 13: Boom, 14: Arm, 15: Bucket, 15a: Bucket toe, 16, 17: Bucket link, 18a: Boom cylinder (actuator), 18b ... Arm cylinder (actuator), 18c ... Bucket cylinder (actuator), 19 ... Swing hydraulic motor (actuator), 21a-21i ... Pilot oil passage, 41 ... Engine, 42 ... Pilot pump, 43 ... Hydraulic pump, 44 ... Operation lever (Hydraulic lever), 44a ... arm operating lever (hydraulic lever), 44b ... Arm operating lever (hydraulic lever), 44c bucket operating lever (hydraulic lever), 44d turning operating lever (hydraulic lever), 45 directional control valve, 46 shutoff valve, 49 oil pressure sensor, 49a-49h oil pressure Sensor, 50: Operation lever (electric lever), 50a: Arm operation lever (electric lever), 50b: Boom operation lever (electric lever), 50c: Bucket operation lever (electric lever), 50d: Swing operation lever (electric lever) 51, a vehicle body controller, 51a, a lever operation determination unit, 51b, a lever operation invalidation instruction unit, 51c, a shutoff valve control unit, 52, a guidance controller (display controller), 52a, a monitor operation invalidation instruction unit, 52b, a monitor Operation state transmission unit, 53: GNSS controller, 54: guidance monitor (display device), 54 ... touch panel, 54b ... monitor display state determination section, 54c ... monitor the operation invalidation unit, 55 ... alarm, 100 ... hydraulic control system.

Claims (5)

Work equipment,
An actuator for driving the work machine,
A hydraulic pump,
A directional control valve for controlling the flow of pressure oil supplied to the actuator from the hydraulic pump,
An operation lever for operating the work machine;
A display device having a touch panel,
In a work machine comprising a display controller that controls the display device,
A vehicle controller capable of switching between enabling and disabling operation of the direction control valve by the operation lever,
The vehicle body controller,
Obtaining a display state of the display device via the display controller,
When the display device is not in the predetermined display state, the operation of the direction control valve by the operation lever is enabled,
When the display device is in the predetermined display state, the operation of the direction control valve by the operation lever is invalidated. The work machine according to claim 1,
The vehicle body controller,
Obtaining the operation state of the operation lever,
When the operation lever is not operated, the input operation on the touch panel is enabled,
When the operation lever is operated, an input operation on the touch panel is invalidated. The work machine according to claim 1,
The display device is configured to display one of a plurality of display screens according to an input operation on the touch panel,
The vehicle body controller,
When a predetermined display screen is not displayed on the display device, the operation of the direction control valve by the operation lever is enabled,
When the predetermined display screen is displayed on the display device, the operation of the direction control valve by the operation lever is invalidated. The work machine according to claim 1,
The operation lever is configured by a hydraulic lever that outputs a pilot pressure of the direction control valve by reducing a pilot primary pressure according to a lever operation,
The working machine is
A pilot pump for supplying the pilot primary pressure to the hydraulic lever,
Further comprising a shutoff valve provided in a pilot oil passage connecting the pilot pump and the hydraulic lever,
The vehicle body controller,
When the display device is not in the predetermined display state, open the shut-off valve and supply the pilot primary pressure to the hydraulic lever,
When the display device is in the predetermined display state, the shutoff valve is closed and supply of the pilot primary pressure to the hydraulic lever is stopped. The work machine according to claim 1,
A pilot pump,
A pressure reducing valve that outputs a pilot pressure of the direction control valve by reducing the pilot primary pressure supplied from the pilot pump,
The operation lever is configured by an electric lever that outputs an electric signal according to the lever operation,
The vehicle body controller,
When the display device is not in the predetermined display state, controls the opening degree of the pressure reducing valve according to an electric signal input from the electric lever,
When the display device is in the predetermined display state, the opening of the pressure reducing valve is set to zero regardless of an electric signal input from the electric lever.

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