Work machine system and method for controlling work machine

Abstract

A work machine system includes: a machine main body to which a work implement is attached; a travel unit that causes the machine main body to travel; an inclination sensor that senses a degree of inclination of the machine main body; an operator presence sensor that senses presence of an operator; a parking brake that brakes the travel unit; an operation device that receives an operation of activating the parking brake; and a controller that performs, when the operation device does not receive the operation, control to prevent the parking brake from being forgotten to be applied, on conditions that the presence of the operator is not sensed and the machine main body is inclined.

1 . A work machine system comprising:
 a machine main body to which a work implement is attached;   a travel unit that causes the machine main body to travel;   an inclination sensor that senses a degree of inclination of the machine main body;   an operator presence sensor that senses presence of an operator;   a parking brake that brakes the travel unit;   an operation device that receives a first operation of activating the parking brake; and   a controller that performs, when the operation device does not receive the first operation, control to prevent the parking brake from being forgotten to be applied, on conditions that the presence of the operator is not sensed and the machine main body is inclined.   
     
     
         2 . The work machine system according to  claim 1 , wherein the controller performs the control to prevent the parking brake from being forgotten to be applied, on a condition that the machine main body is not traveling. 
     
     
         3 . The work machine system according to  claim 1 , further comprising an output device, wherein
 the controller causes, as the control to prevent the parking brake from being forgotten to be applied, the output device to issue an alarm.   
     
     
         4 . The work machine system according to  claim 3 , wherein when the presence of the operator is sensed, when the inclination of the machine main body is no longer sensed, or when the operation device receives the first operation, after causing the output device to issue the alarm, the controller causes the issuing of the alarm to be stopped. 
     
     
         5 . The work machine system according to  claim 3 , further comprising an operator's cab, wherein
 the output device issues the alarm to an outside of the operator's cab.   
     
     
         6 . The work machine system according to  claim 1 , wherein the controller causes, as the control to prevent the parking brake from being forgotten to be applied, the parking brake to be activated. 
     
     
         7 . The work machine system according to  claim 6 , wherein
 the operation device further receives a second operation of releasing the parking brake, and   the work machine system causes the parking brake to be released when the operation device receives the second operation after control to activate the parking brake is performed as the control to prevent the parking brake from being forgotten to be applied.   
     
     
         8 . The work machine system according to  claim 6 , further comprising an output device, wherein
 the controller
 further causes, as the control to prevent the parking brake from being forgotten to be applied, the output device to issue an alarm, and 
 when the presence of the operator is sensed or when the inclination of the machine main body is no longer sensed after causing the output device to issue the alarm, causes the issuing of the alarm to be stopped and causes the parking brake to be automatically released. 
   
     
     
         9 . The work machine system according to  claim 6 , further comprising an output device, wherein
 the controller
 further causes, as the control to prevent the parking brake from being forgotten to be applied, the output device to issue an alarm, and 
 when the presence of the operator is sensed or when the inclination of the machine main body is no longer sensed after causing the output device to issue the alarm, causes the issuing of the alarm to be stopped, and on a condition that the operation device receives a second operation of releasing the parking brake, causes the parking brake to be released. 
   
     
     
         10 . The work machine system according to  claim 1 , wherein the work machine system is a work machine. 
     
     
         11 . The work machine system according to  claim 1 , comprising a work machine including the machine main body, the work implement, the travel unit, the inclination sensor, and the parking brake, wherein
 the operator presence sensor and the operation device are provided in a remote control cab from which the work machine is remotely steered.   
     
     
         12 . A method for controlling a work machine, the method comprising:
 sensing, by a first sensor, whether or not an operator of a work machine is present;   sensing, by a second sensor, a degree of inclination of a machine main body of the work machine; and   when a parking brake that brakes a travel unit of the machine main body is not activated, performing, by a controller, control to prevent the parking brake from being forgotten to be applied, on conditions that presence of the operator is not sensed and the machine main body is inclined.