Work machine

Abstract

To provide a work machine of which discriminability on whether a specific monitoring function is null or effective is improved.SOLUTION: A work machine is provided with a traveling body, a revolving super structure, a work machine, a first daylight, and a controller. The revolving super structure is mounted on the traveling body and is capable of revolving with respect to the traveling body. The work machine is movably attached on the revolving body. The first daylight is arranged on the revolving body and capable of lighting selectively in a plurality of different colors to each other. The controller is capable of switching the specific monitoring function of the work machine between null and effective. The controller lights the first daylight in different colors according to cases where the specific monitoring function is effective or null.SELECTED DRAWING: Figure 13

Description

Technical Field

[0001] The present disclosure relates to a working machine.

Background Art

[0002] Some working machines are equipped with a predetermined monitoring function. For example, the working machine of Patent Document 1 has a peripheral monitoring mode. The controller of the working machine monitors the presence of people or objects around the working machine in the peripheral monitoring mode. The controller can switch between enabling and disabling the peripheral monitoring mode. For example, when the operator of the working machine operates an input device such as a switch, the controller switches between enabling and disabling the peripheral monitoring mode. When the controller detects the presence of a person or an object around the working machine while the peripheral monitoring mode is enabled, it outputs an alarm to the operator of the working machine.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Some working machines are equipped with a warning light that indicates whether the above-described predetermined monitoring function is invalid or valid. The warning light is disposed so as to be exposed outside the working machine. The warning light is, for example, a rotating light. The controller switches between turning on and turning off the warning light according to whether the monitoring function is invalid or valid. Thereby, a person outside the working machine can grasp whether the monitoring function in the working machine is invalid or valid. However, in a working machine, it is desired to further improve the discriminability between enabling and disabling the monitoring function. An object of the present disclosure is to improve the discriminability between whether a predetermined monitoring function is invalid or valid in a working machine.

Means for Solving the Problem

[0005] A working machine according to an aspect of the present disclosure includes a traveling body, a revolving body, a working implement, a first daytime light, and a controller. The revolving body is disposed on the traveling body and is rotatable with respect to the traveling body. The working implement is operably attached to the revolving body. The first daytime light is disposed on the revolving body and is selectively capable of emitting light in a plurality of different colors. The controller is capable of switching between enabling and disabling a predetermined monitoring function of the working machine. The controller causes the first daytime light to emit light in different colors when the predetermined monitoring function is enabled and when it is disabled.

[0006] A method according to another aspect of the present disclosure is a method for controlling a working machine. The working machine includes a traveling body, a revolving body, a working implement, and a first daytime light. The revolving body is disposed on the traveling body and is rotatable with respect to the traveling body. The working implement is operably attached to the revolving body. The first daytime light is disposed on the revolving body and is selectively capable of emitting light in a plurality of different colors. The method includes switching between enabling and disabling a predetermined monitoring function of the working machine, and causing the first daytime light to emit light in different colors when the predetermined monitoring function is enabled and when it is disabled.

Advantageous Effects of the Invention

[0007] In the working machine according to the present disclosure, the first daytime light lights up or blinks in different colors when a predetermined monitoring function is enabled and when it is disabled. Thereby, the distinguishability as to whether the predetermined monitoring function is disabled or enabled is improved.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Mode for Carrying Out the Invention

[0009] Hereinafter, the working machine according to the embodiment will be described with reference to the drawings. FIG. 1 is a side view of the working machine 1. In the present embodiment, the working machine 1 is an excavator such as a hydraulic excavator or an electric excavator.

[0010] As shown in Fig. 1, the working machine 1 includes a working implement 3, a revolving body 4, and a traveling body 5. The working implement 3 is operably attached to the revolving body 4. The revolving body 4 is disposed on the traveling body 5. The revolving body 4 is rotatable with respect to the traveling body 5. The revolving body 4 includes a cab 6 and a rear body 7. Inside the cab 6, a driver's seat (not shown) and an operating device (to be described later) are disposed. The rear body 7 is disposed behind the cab 6. The traveling body 5 includes crawler tracks 8. In Fig. 1, only one of the left and right crawler tracks 8 is shown. The working machine 1 travels by driving the crawler tracks 8.

[0011] The working implement 3 is attached to the revolving body 4 so as to be vertically operable. The working implement 3 includes a boom 11, an arm 12, and a bucket 13. The boom 11 is rotatably attached to the revolving body 4. The arm 12 is rotatably attached to the boom 11. The bucket 13 is rotatably attached to the arm 12.

[0012] The working implement 3 includes a boom cylinder 14, an arm cylinder 15, and a bucket cylinder 16. The boom cylinder 14, the arm cylinder 15, and the bucket cylinder 16 are, for example, hydraulic cylinders. The boom cylinder 14 operates the boom 11. The arm cylinder 15 operates the arm 12. The bucket cylinder 16 operates the bucket 13.

[0013] The working implement 3 includes a suspension hook 17. The suspension hook 17 is used when the working machine 1 performs crane work. In crane work, a load is suspended from the suspension hook 17 via a member such as a wire. The suspension hook 17 is attached to the bucket link 19. The suspension hook 17 may be storable inside the working implement 3. Alternatively, the suspension hook 17 may be detachable from the working implement 3.

[0014] Figure 2 is a perspective view of the revolving body 4. Figure 3 is a left side view of the revolving body 4. Figure 4 is a right side view of the revolving body 4. Figure 5 is a rear view of the revolving body 4. As shown in Figures 2 to 5, the working machine 1 includes working lights 21-24. The working lights 21-24 are arranged on the revolving body 4. The working lights 21-24 include, for example, LEDs. Alternatively, the working lights 21-24 may include light bulbs. The working lights 21-24 include a front working light 21, a left working light 22, a right working light 23, and a rear working light 24.

[0015] As shown in Figure 2, the front working light 21 is arranged on the front surface of the cab 6. The front working light 21 is arranged facing forward and irradiates light forward of the revolving body 4. As shown in Figure 3, the left working light 22 is arranged on the left side surface of the rear body 7. The left working light 22 is arranged facing leftward and irradiates light to the left side of the revolving body 4. As shown in Figure 4, the right working light 23 is arranged on the right side surface of the rear body 7. The right working light 23 is arranged facing rightward and irradiates light to the right side of the revolving body 4. As shown in Figure 5, the rear working light 24 is arranged on the rear surface of the rear body 7. The rear working light 24 is arranged facing rearward and irradiates light to the rear of the revolving body 4.

[0016] The working machine 1 includes daytime running lights 25-27. The daytime running lights 25-27 are arranged on the revolving body 4. The daytime running lights 25-27 each include, for example, an LED. Each of the daytime running lights 25-27 can selectively emit light in a plurality of colors. The daytime running lights 25-27 include a first daytime running light 25, a second daytime running light 26, and a third daytime running light 27.

[0017] As shown in Fig. 2, the first daytime running light 25 is disposed on the front surface of the cab 6. The first daytime running light 25 is arranged facing forward and irradiates light toward the front of the revolving body 4. As shown in Fig. 3, the second daytime running light 26 is disposed on the left side surface of the rear body 7. The second daytime running light 26 is arranged facing leftward and irradiates light toward the left side of the revolving body 4. As shown in Fig. 4, the third daytime running light 27 is disposed on the right side surface of the rear body 7. The third daytime running light 27 is arranged facing rightward and irradiates light toward the right side of the revolving body 4.

[0018] The working machine 1 is provided with cameras 31 - 34. The cameras 31 - 34 capture images of the periphery of the working machine 1. The cameras 31 - 34 are disposed on the revolving body 4. The cameras 31 - 34 include a first camera 31, a second camera 32, a third camera 33, and a fourth camera 34. As shown in Fig. 3, the first camera 31 is disposed on the left side surface of the rear body 7. The first camera 31 is arranged facing leftward and captures an image of the left side of the revolving body 4. As shown in Fig. 4, the second camera 32 is disposed on the right side surface of the rear body 7. The second camera 32 is arranged facing rightward and captures an image of the right side of the revolving body 4. As shown in Fig. 5, the third camera 33 is disposed on the rear surface of the rear body 7. The third camera 33 is arranged facing rearward and captures an image of the rear of the revolving body 4. As shown in Fig. 3, the fourth camera 34 is disposed on the front surface of the cab 6. The fourth camera 34 is arranged facing forward and captures an image of the front of the revolving body 4.

[0019] Figs. 6 and 7 are block diagrams showing the configuration of the control system of the working machine 1. As shown in Fig. 6, the working machine 1 includes a drive source 41, a hydraulic pump 42, a power transmission device 43, and a controller 44. The drive source 41 is controlled by a command signal from the controller 44. The drive source 41 is, for example, an internal combustion engine. Alternatively, the drive source 41 may include other drive sources such as an electric motor or a hydrogen engine. The hydraulic pump 42 is driven by the drive source 41 and discharges hydraulic oil. The hydraulic oil discharged from the hydraulic pump 42 is supplied to the boom cylinder 14, the arm cylinder 15, and the bucket cylinder 16.

[0020] The working machine 1 includes a slewing motor 18. The slewing motor 18 is, for example, a hydraulic motor. The slewing motor 18 is driven by the hydraulic oil from the hydraulic pump 42. Alternatively, the slewing motor 18 may be an electric motor. The slewing motor 18 slews the slewing body 4. The hydraulic pump 42 is a variable displacement pump. A pump control device 45 is connected to the hydraulic pump 42. The pump control device 45 controls the swashplate angle of the hydraulic pump 42. The pump control device 45 includes, for example, a solenoid valve and is controlled by a command signal from the controller 44. The controller 44 controls the capacity of the hydraulic pump 42 by controlling the pump control device 45. In FIG. 6, one hydraulic pump is illustrated, but a plurality of hydraulic pumps may be provided.

[0021] The working machine 1 includes a control valve 46. The hydraulic pump 42, the cylinders 14-16, and the slewing motor 18 are connected by a hydraulic circuit via the control valve 46. The control valve 46 is controlled by a command signal from the controller 44. The control valve 46 controls the flow rate of the hydraulic oil supplied from the hydraulic pump 42 to the cylinders 14-16 and the slewing motor 18. The controller 44 controls the operation of the working machine 3 by controlling the control valve 46. The controller 44 controls the slewing of the slewing body 4 by controlling the control valve 46. Note that the cylinders 14-16 are not limited to hydraulic cylinders and may be mechanical cylinders driven by an electric motor.

[0022] The power transmission device 43 transmits the driving force of the drive source 41 to the traveling body 5. The crawler belts 8 are driven by the driving force from the power transmission device 43 to move the working machine 1. The power transmission device 43 may be, for example, a torque converter or a transmission having a plurality of speed change gears. Alternatively, the power transmission device 43 may be another type of transmission such as an HST (Hydro Static Transmission) or an HMT (Hydraulic Mechanical Transmission).

[0023] The controller 44 includes a processor 47 such as a CPU and a storage device 48. The processor 47 performs processing for controlling the machine tool 1. The storage device 48 includes a memory such as a RAM or a ROM, and an auxiliary storage device such as an HDD (Hard Disk Drive) or an SSD (Solid State Drive). The storage device 48 stores data and programs for controlling the machine tool 1.

[0024] As shown in FIG. 7, the control system includes a start switch 51, operating devices 52 - 54, an input device 55, and a display 56. The start switch 51, the operating devices 52 - 54, the input device 55, and the display 56 are arranged in the cab 6. The start switch 51 is operable by the operator. The start switch 51 is, for example, a key switch and is operable between an off position and an on position. When the start switch 51 is in the on position, the electrical system of the machine tool 1 is started. The start switch 51 outputs an on signal corresponding to the operation by the operator to the controller 44. The start switch 51 may further be operable to an engine start position. When the drive source 41 is an internal combustion engine, the engine may be started when the start switch 51 is operated to the engine start position. Alternatively, the start switch 51 may be an engine start switch. Alternatively, when the drive source 41 is an electric motor, the start switch 51 may be a power switch.

[0025] The operating devices 52 - 54 are operable by the operator. The operating devices 52 - 54 include, for example, levers, pedals, or switches. The operating devices 52 - 54 output an operation signal corresponding to the operation by the operator to the controller 44. The operating devices 52 - 54 include a traveling operating device 52, a turning operating device 53, and a work implement operating device 54.

[0026] The controller 44 controls the drive source 41 and the power transmission device 43 so as to run the work machine 1 in accordance with the operation of the travel operation device 52 by the operator. The controller 44 controls the control valve 46 so as to turn the revolving body 4 in accordance with the operation of the swing operation device 53 by the operator. The controller 44 controls the control valve 46 so as to operate the work implement 3 in accordance with the operation of the work implement operation device 54 by the operator.

[0027] The input device 55 can be operated by the operator. The input device 55 includes a touch screen. However, the input device 55 may include hardware keys or switches. The operator inputs settings for controlling the work machine 1 by operating the input device 55. The input device 55 outputs an input signal corresponding to the operation of the operator to the controller 44. The display 56 is, for example, an LCD, an OELD, or another type of display. The display 56 displays a screen corresponding to the display signal from the controller 44.

[0028] The work machine 1 includes a work lamp switch 57. The work lamp switch 57 can be operated by the operator. The controller receives a signal indicating the operation of the work lamp switch 57. The controller switches on and off the front work lamp 21, the left work lamp 22, the right work lamp 23, and the rear work lamp 24 in accordance with the operation of the work lamp switch 57.

[0029] The work machine 1 includes an attitude sensor 58. The attitude sensor 58 detects the attitude of the work implement 3. The attitude sensor 58 outputs an attitude signal indicating the attitude of the work implement 3 to the controller 44. The attitude sensor 58 is, for example, a sensor that detects the stroke lengths of the cylinders 14-16. The controller 44 may calculate the respective rotation angles of the boom 11, the arm 12, and the bucket 13 from the stroke lengths of the cylinders 14-16. Alternatively, the attitude sensor 58 may be an angle sensor that directly detects the respective rotation angles of the boom 11, the arm 12, and the bucket 13.

[0030] The working machine 1 includes a first sensor 61 and a second sensor 62. The first sensor 61 detects the load on the working machine 3. The first sensor 61 outputs a load signal indicating the load on the working machine 3 to the controller 44. The first sensor 61 is, for example, a pressure sensor that detects the hydraulic pressure of the cylinders 14-16. The controller 44 calculates the load on the working machine 3 from the hydraulic pressure of the cylinders 14-16 as the load on the working machine 3.

[0031] The second sensor 62 detects the presence of people or objects around the working machine 1. The second sensor 62 includes the above-described first camera 31, second camera 32, third camera 33, and fourth camera 34. The second sensor 62 outputs image data indicating an image of the surroundings of the working machine 1 taken by the first camera 31, second camera 32, third camera 33, and fourth camera 34 to the controller 44.

[0032] Based on the load signal from the first sensor 61 and the image data from the second sensor 62, the controller 44 executes processing for a predetermined monitoring function of the working machine 1. The predetermined monitoring function includes a peripheral monitoring mode and a load monitoring mode.

[0033] In the peripheral monitoring mode, the controller 44 monitors the presence of people or objects around the working machine 1. In the peripheral monitoring mode, the controller 44 monitors the presence of people or objects around the working machine 1 based on the image data from the second sensor 62. For example, FIG. 8 is a diagram showing an example of the display screen 63 of the display 56 when the peripheral monitoring mode is effective.

[0034] As shown in FIG. 8, the display screen 63 in the peripheral monitoring mode includes the working machine 1 and an aerial view image 64 showing its surroundings. The controller 44 generates the aerial view image 64 based on the image data from the second sensor 62 and displays it on the display screen 63. Note that the display screen 63 in the peripheral monitoring mode is not limited to the above and may be changed. For example, the controller 44 may display the images taken by each of the first camera 31, second camera 32, third camera 33, and fourth camera 34 on the display screen 63.

[0035] Further, the controller 44 analyzes the image data from the second sensor 62 to detect a person or an object around the working machine 1. When a person or an object is detected around the working machine 1, the controller 44 outputs an alarm to the operator. For example, an icon 65 indicating an alarm may be displayed on the display screen 63 of the display 56. Alternatively, the alarm may be output by lighting a lamp provided in the cab 6 or by sound from a speaker. Alternatively, when a person or an object is detected around the working machine 1, the controller 44 may control the working machine 3, the slewing body 4, or the traveling body 5 to limit the operation of the working machine 1.

[0036] In the load monitoring mode, the controller 44 monitors the load on the working machine 3 during crane operation. In the load monitoring mode, the controller 44 monitors the load on the working machine 3 based on the load signal from the first sensor 61. For example, FIG. 9 is a diagram showing an example of the display screen 66 of the display 56 when the load monitoring mode is effective.

[0037] As shown in FIG. 9, the display screen 66 in the load monitoring mode includes a display 67 of the actual load. The display 67 of the actual load indicates the magnitude of the actual load applied to the working machine 3. The controller 44 calculates the actual load based on the load signal from the first sensor 61 and causes the display 67 of the actual load to be displayed on the display screen 66. The display screen 66 in the load monitoring mode includes a display 68 of the rated load. The rated load indicates the upper limit of the load on the working machine 3 that the working machine 1 allows. The rated load changes according to the posture of the working machine 3. The controller 44 calculates the rated load based on the posture signal from the posture sensor 58 and causes the display 68 of the rated load to be displayed on the display screen 66. The display screen 66 in the load monitoring mode includes a display 69 of the load factor. The load factor indicates the ratio of the actual load to the rated load. The controller 44 calculates the load factor from the actual load and the rated load and causes the display 69 of the load factor to be displayed on the display screen 66. Note that the display screen 66 in the load monitoring mode is not limited to the above and may be changed.

[0038] Further, when the actual load or the load factor reaches a predetermined threshold value or higher, the controller 44 outputs an alarm to the operator. The alarm is displayed, for example, on the display screen 66 of the display 56. Alternatively, the alarm may be output by lighting a lamp provided in the cab 6 or by sound from a speaker.

[0039] The controller 44 can switch between enabling and disabling the peripheral monitoring mode according to the operation by the operator on the input device 55. The controller 44 can switch between enabling and disabling the load monitoring mode according to the operation by the operator on the input device 55. Also, the controller 44 causes the daylights 25 - 27 to emit light in different colors when the above-described monitoring function is enabled and when it is disabled. Hereinafter, the control of the daylights 25 - 27 by the controller 44 will be described.

[0040] Figures 10 to 12 are flowcharts showing the processing of controlling the daylights 25 - 27 by the controller 44. Figure 13 is a table showing the light emission patterns of the daylights 25 - 27. As shown in Figure 10, the controller 44 determines the presence or absence of an on signal. When there is no on signal, that is, when the start switch 51 is in the off position, in step S102, the daylights 25 - 27 are turned off. When there is an on signal, that is, when the start switch 51 is in the on position, the process proceeds to step S103.

[0041] In step S103, the controller 44 determines whether the load monitoring mode is enabled. If the load monitoring mode is disabled, the process proceeds to step S104. In step S104, the controller 44 determines whether the peripheral monitoring mode is enabled. If the peripheral monitoring mode is disabled, the process proceeds to step S105.

[0042] In step S105, the controller 44 determines whether the daylight setting is valid. The controller 44 can switch the turning off and on of the daylight 25-27 according to the operation of the input device 55 by the operator. When the daylight setting is invalid, in step S106, the controller 44 turns off the daylight 25-27. When the daylight setting is valid, the process proceeds to step S107.

[0043] In step S107, the controller 44 determines whether the revolving body 4 is revolving. The controller 44 determines whether the revolving body 4 is revolving based on, for example, the operation of the revolving operation device 53. When the revolving body 4 is not revolving, that is, when the revolving body 4 is stopped, the process proceeds to step S108.

[0044] In step S108, the controller 44 determines whether the traveling body 5 is traveling. The controller 44 determines whether the traveling body 5 is traveling based on, for example, the operation of the traveling operation device 52. When the traveling body 5 is not traveling, in step S109, the controller 44 constantly lights the daylight 25-27 with the first color C1. The first color C1 is, for example, white. FIG. 14 is a time chart showing the light emission pattern of the daylight 25-27. As shown in FIG. 14, in the case of constant lighting, the controller 44 continuously emits light from the daylight 25-27.

[0045] As described above, when the start switch 51 is in the off position, the daylight 25-27 is turned off. When the start switch 51 is in the on position, all monitoring functions are invalid, and the revolving body 4 and the traveling body 5 are stopped, the controller 44 constantly lights the daylight 25-27 with the first color C1. However, when the daylight setting is invalid, the controller 44 turns off the daylight 25-27 even when the start switch 51 is in the on position.

[0046] As shown in FIG. 10, when the revolving body 4 is revolving in step S107, in step S110, the controller 44 causes the daytime lights 25-27 to blink in the first color C1 and the blinking pattern A. Also, when the traveling body 5 is traveling in step S108, in step S110 as well, the controller 44 causes the daytime lights 25-27 to blink in the first color C1 and the blinking pattern A. As shown in FIG. 14, in the blinking pattern A, the lighting of the daytime lights 25-27 for the time T1a and the extinguishing for the time T2a are repeated.

[0047] As described above, when the start switch 51 is in the ON position, all monitoring functions are invalid, and the revolving body 4 is revolving or the traveling body 5 is traveling, the controller 44 causes the daytime lights 25-27 to blink in the first color C1 and the blinking pattern A. That is, when the revolving body 4 is revolving, the controller 44 causes the daytime lights 25-27 to emit light in a pattern different from when the revolving body 4 is stopped. Also, when the traveling body 5 is traveling, the controller 44 causes the daytime lights 25-27 to emit light in a pattern different from when the work machine 1 is stopped.

[0048] In step S104, when the peripheral monitoring mode is valid, in step S111, the controller 44 causes the daytime lights 25-27 to blink in the fourth color C4 and the blinking pattern B. The fourth color C4 is a color different from the first color C1. The fourth color C4 is, for example, green.

[0049] As described above, when the start switch 51 is in the ON position, the load monitoring mode is invalid, the peripheral monitoring mode is valid, and the revolving body 4 and the traveling body 5 are stopped, the controller 44 causes the daytime lights 25-27 to blink in the fourth color C4 and the blinking pattern B. Note that when the start switch 51 is in the ON position, the load monitoring mode is invalid, the peripheral monitoring mode is valid, and the revolving body 4 is revolving or the traveling body 5 is traveling, the controller 44 also causes the daytime lights 25-27 to blink in the fourth color C4 and the blinking pattern B.

[0050] If the load monitoring mode is valid in step S103, the process proceeds to step S201 shown in FIG. 11. In step S201, the controller 44 determines whether the peripheral monitoring mode is valid. If the peripheral monitoring mode is invalid, the process proceeds to step S202.

[0051] In step S202, the controller 44 determines whether the load on the working machine 3 is a light load. For example, when the actual load on the working machine 3 is equal to or less than the first threshold value, the controller 44 determines that the load on the working machine 3 is a light load. If the load on the working machine 3 is a light load, in step S203, the controller 44 causes the daylight lamps 25-27 to blink in the fourth color C4 and the blink pattern B.

[0052] The blink pattern B is a pattern different from the blink pattern A. As shown in FIG. 14, in the blink pattern B, the lighting of the daylight lamps 25-27 for the time T1b and the extinguishing for the time T2b are repeated. The lighting time T1b of the blink pattern B is different from the lighting time T1a of the blink pattern A. Also, the extinguishing time T2b of the blink pattern B is different from the extinguishing time T2a of the blink pattern A. Alternatively, only one of the lighting time and the extinguishing time may be different.

[0053] If the load on the working machine 3 is not a light load in step S202, the process proceeds to step S204. In step S204, the controller 44 determines whether the load on the working machine 3 is a medium load. For example, when the actual load on the working machine 3 is greater than the first threshold value and equal to or less than the second threshold value, the controller 44 determines that the load on the working machine 3 is a medium load. If the load on the working machine 3 is a medium load, in step S205, the controller 44 causes the daylight lamps 25-27 to blink in the third color C3 and the blink pattern B. The third color C3 is different from the first color C1 and the fourth color C4. The third color C3 is, for example, orange.

[0054] If the load on the working machine 3 is not medium in step S204, the process proceeds to step S206. That is, when the load on the working machine 3 is greater than the second threshold value and the load on the working machine 3 is high, in step S206, the controller 44 causes the daylights 25 - 27 to blink in the second color C2 and the blinking pattern B. The second color C2 is different from the first color C1, the third color C3, and the fourth color C4. The second color C2 is, for example, red.

[0055] As described above, when the start switch 51 is in the ON position, the load monitoring mode is valid, the peripheral monitoring mode is invalid, and the slewing body 4 and the traveling body 5 are stopped, the controller 44 causes the daylights 25 - 27 to blink in the blinking pattern B. Further, the controller 44 causes the daylights 25 - 27 to emit light in different colors according to the load on the working machine 3. As shown in FIG. 13, when the start switch 51 is in the ON position, the peripheral monitoring mode is invalid, the load monitoring mode is valid, and the slewing body 4 is slewing or the traveling body 5 is traveling, the controller 44 also causes the daylights 25 - 27 to blink in the blinking pattern B and emit light in different colors according to the load on the working machine 3.

[0056] If the peripheral monitoring mode is valid in step S201, the process proceeds to step S301 shown in FIG. 12. Steps S301 and S302 are the same as steps S202 and S204, respectively. That is, the controller 44 determines whether the load on the working machine 3 is high, medium, or light by the processes of steps S301 and S302.

[0057] When the load on the working machine 3 is high, in step S303, the controller 44 causes the daylights 25 - 27 to emit light alternately in the fourth color C4 and the second color C2 in the blinking pattern C. The fourth color C4 indicates that the peripheral monitoring mode is valid. The second color C2 indicates that the load monitoring mode is valid and the load on the working machine 3 is high.

[0058] The pattern of blinking C is different from the patterns of blinking A and blinking B. As shown in FIG. 14, in the pattern of blinking C, the lighting of the daylight 25-27 in the second color C2 for the time T1c, the extinguishing of the light for the time T2c, the lighting of the daylight 25-27 in the third color C3 for the time T3c, and the extinguishing of the light for the time T4c, and the lighting of the daylight 25-27 in the fourth color C4 for the time T1c, the extinguishing of the light for the time T2c, the lighting of the daylight 25-27 in the third color C3 for the time T3c, and the extinguishing of the light for the time T4c are repeated. The extinguishing of the light for the time T4c while the color changes is longer than the time T2c while blinking in the same color.

[0059] When the load on the working machine 3 is a medium load, in step S304, the controller 44 causes the daylight 25-27 to emit light alternately in the fourth color C4 and the third color C3 in the pattern of blinking C. The third color C3 indicates that the load monitoring mode is effective and the load on the working machine 3 is a medium load. When the load on the working machine 3 is a light load, in step S305, the controller 44 causes the daylight 25-27 to emit light in the fourth color C4 in the pattern of blinking C. The fourth color C4 indicates that the peripheral monitoring mode is effective and the load monitoring mode is effective and the load on the working machine 3 is a light load.

[0060] As described above, when the start switch 51 is in the on position, the load monitoring mode is effective, the peripheral monitoring mode is effective, and the revolving body 4 and the traveling body 5 are stopped, the controller 44 causes the daylight 25-27 to blink in the pattern of blinking C. Further, the controller 44 causes the daylight 25-27 to emit light alternately in the fourth color C4 indicating that the peripheral monitoring mode is effective and the color corresponding to the load on the working machine 3.

[0061] In the working machine 1 according to the embodiment described above, when a predetermined monitoring function is valid or invalid, the daytime lights 25-27 are lit in different colors. Thereby, the discriminability as to whether the predetermined monitoring function is invalid or valid is improved. Further, the daytime lights 25-27 are used as warning lights to indicate whether the predetermined monitoring function is valid or invalid. Thereby, an increase in manufacturing cost or an increase in the size of the working machine 1 can be suppressed as compared with the case where a separate warning light is added.

[0062] As described above, an embodiment of the present invention has been described. However, the present invention is not limited to the above embodiment, and various modifications are possible without departing from the gist of the invention.

[0063] The configuration of the working machine 1 is not limited to that of the above embodiment and may be changed. The arrangement of the daytime lights 25-27 is not limited to that of the above embodiment and may be changed. For example, the first daytime light 25 may be arranged on the rear body 7. The second daytime light 26 and the third daytime light 27 may be provided in the cab 6. The number of the daytime lights 25-27 is not limited to three, and may be less than three or more than three.

[0064] The first to fourth colors C1-C4 are not limited to those of the above-described embodiment and may be changed. The number of colors in which the daytime lights 25-27 can emit light is not limited to four, and may be less than four or more than four. The light emission pattern of the daytime lights 25-27 is not limited to that of the above embodiment and may be changed. For example, instead of blinking, constant lighting may be used.

[0065] The predetermined monitoring function is not limited to the peripheral monitoring mode and the load monitoring mode, and may include other monitoring modes. Either the peripheral monitoring mode or the load monitoring mode may be omitted. The number of load levels determined in the load monitoring mode is not limited to three, and may be less than three or more than three.

[0066] The first sensor 61 may be a sensor that detects a load such as a load cell, not limited to a pressure sensor. The second sensor 62 may be other sensors such as a millimeter-wave radar or infrared rays, not limited to a camera.

Industrial Applicability

[0067] According to the present disclosure, in a working machine, it is possible to improve the discriminability as to whether a predetermined monitoring function is invalid or valid while suppressing an increase in the manufacturing cost or an increase in size of the working machine.

Explanation of Signs

[0068] 3: Working machine, 4: Slewing body, 5: Traveling body, 25: First daylight, 26: Second daylight, 27: Third daylight, 44: Controller, 51: Start switch, 61: First sensor, 62: Second sensor

Claims

1. A working machine, a traveling body, a revolving body disposed on the traveling body and capable of revolving with respect to the traveling body, a working implement operably attached to the revolving body, a first daytime light disposed on the revolving body and selectively capable of emitting light in a plurality of different colors, a controller capable of switching between enabling and disabling a predetermined monitoring function of the working machine, comprising: when the predetermined monitoring function is enabled and when it is disabled, the controller causes the first daytime light to emit light in different colors, a working machine.

2. further comprising a first sensor for detecting a load on the working implement, the predetermined monitoring function includes a load monitoring mode for monitoring the load on the working implement, when the load monitoring mode is enabled and when it is disabled, the controller causes the first daytime light to emit light in different colors, the working machine according to claim 1.

3. the controller, acquires the load on the working implement detected by the first sensor, when the load monitoring mode is enabled, causes the first daytime light to emit light in different colors according to the magnitude of the load, the working machine according to claim 2.

4. further comprising a second sensor for detecting the presence of a person or an object around the working machine, the predetermined monitoring function includes a peripheral monitoring mode for monitoring the presence of a person or an object around the working machine, when the peripheral monitoring mode is enabled and when it is disabled, the controller causes the first daytime light to emit light in different colors, the working machine according to claim 1.

5. a first sensor for detecting a load on the working implement, and a second sensor for detecting the presence of a person or an object around the working machine, further comprising: the predetermined monitoring function includes a load monitoring mode for monitoring the load on the working implement and a peripheral monitoring mode for monitoring the presence of a person or an object around the working machine, when the load monitoring mode is enabled and the peripheral monitoring mode is enabled, the controller causes the first daytime light to emit light alternately in a first color indicating that the load monitoring mode is enabled and a second color indicating that the peripheral monitoring mode is enabled, the working machine according to claim 1.

6. when the working machine is in motion, the controller causes the first daytime light to emit light in a pattern different from when the working machine is stopped, the working machine according to claim 1.

7. When the revolving body is in the process of revolving, the controller causes the first daytime running light to emit light in a pattern different from that when the revolving body is stopped. The work machine according to claim 1.

8. When the predetermined monitoring function is effective and when it is ineffective, the controller causes the first daytime running light to emit light in different patterns. The work machine according to claim 1.

9. The different pattern is blinking. The work machine according to any one of claims 6 to 8.

10. The work machine further includes a start switch, When the start switch is in the on state and the predetermined monitoring function is ineffective, the controller causes the first daytime running light to be constantly lit. The work machine according to claim 1.

11. A second daytime running light that is arranged facing one side of the revolving body and can selectively emit light in a plurality of different colors, A third daytime running light that is arranged facing the other side of the revolving body and can selectively emit light in a plurality of different colors, The work machine further includes: The first daytime running light is arranged facing the front of the revolving body, The controller, When the predetermined monitoring function is effective and when it is ineffective, the controller causes the second daytime running light and the third daytime running light to emit light in different colors together with the first daytime running light. The work machine according to claim 1.

12. A method for controlling a work machine, The work machine includes: A traveling body, A revolving body that is arranged on the traveling body and can revolve with respect to the traveling body, A work implement that is operably attached to the revolving body, A first daytime running light that is arranged on the revolving body and can selectively emit light in a plurality of different colors, The work machine includes: The method includes: Switching between enabling and disabling a predetermined monitoring function of the work machine, Causing the first daytime running light to emit light in different colors when the predetermined monitoring function is effective and when it is ineffective. The method includes the above steps.

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