Work machine and control system for work machine

Abstract

A bulldozer includes: a travel manipulation lever that receives a manipulation of an operator and outputs a travel command to allow a travel device to travel or to stop the travel device; a fuel adjustment dial that sets a rotation speed of an engine; a seating sensor that outputs a seating signal indicating a sensed result of whether or not the operator is seated in an operator seat; a monitor that performs notification to the operator; and a controller. When the travel command to allow the travel device to travel is issued from the travel manipulation lever, a set value of the rotation speed of the engine is lower than or equal to a predetermined value, and the operator is not seated in the operator seat, the controller causes the monitor to perform the notification.

1 . A work machine comprising:
 a vehicular body;   an engine installed in the vehicular body;   a travel device that is attached to the vehicular body and travels by an output of the engine;   a travel manipulation device that receives a manipulation of an operator and outputs a travel command to allow the travel device to travel or to stop the travel device;   a rotation speed setting device that sets a rotation speed of the engine;   a seating sensor that outputs a seating signal indicating a sensed result of whether or not the operator is seated in an operator seat;   a notification device that performs notification to the operator; and   a controller, wherein 
 the controller receives an input of the travel command from the travel manipulation device, receives an input of a set value of the rotation speed of the engine from the rotation speed setting device, and receives an input of the seating signal from the seating sensor, and 
 when the travel command to allow the travel device to travel is issued, the set value of the rotation speed of the engine is lower than or equal to a predetermined value, and the operator is not seated in the operator seat, the controller causes the notification device to perform the notification. 
   
     
     
         2 . The work machine according to  claim 1 , wherein the notification by the notification device includes a display that prompts to manipulate the travel manipulation device to output the travel command to stop the travel device. 
     
     
         3 . The work machine according to  claim 2 , wherein
 the travel manipulation device includes a manipulation lever that can be manipulated in a plurality of directions, and   the notification by the notification device includes a display that prompts to locate the manipulation lever at a neutral position.   
     
     
         4 . The work machine according to  claim 2 , wherein, when the controller receives the input of the travel command to stop the travel device from the travel manipulation device, the controller stops the notification by the notification device. 
     
     
         5 . The work machine according to  claim 1 , wherein the notification by the notification device includes a display that prompts the operator to sit in the operator seat. 
     
     
         6 . The work machine according to  claim 1 , wherein the notification by the notification device includes a display of a character message. 
     
     
         7 . The work machine according to  claim 6 , wherein the notification by the notification device involves generation of sound. 
     
     
         8 . The work machine according to  claim 1 , comprising a brake manipulation device that manipulates activation and release of a parking brake that maintains the travel device in a stopped state, wherein
 the controller performs the notification by the notification device during the release of the parking brake.   
     
     
         9 . The work machine according to  claim 8 , wherein the brake manipulation device is a switch that can be manipulated by the operator seated in the operator seat. 
     
     
         10 . The work machine according to  claim 1 , comprising a motive power transmission device that transmits a drive force of the engine to the travel device, wherein
 the motive power transmission device has a pump that converts the drive force of the engine into energy of a fluid, and a motor that converts the energy of the fluid converted by the pump into drive energy and outputs the drive energy to the travel device.   
     
     
         11 . The work machine according to  claim 1 , wherein the work machine is a bulldozer including a blade in front of the vehicular body. 
     
     
         12 . A work machine comprising:
 a vehicular body;   an engine installed in the vehicular body;   a travel device that is attached to the vehicular body and travels by an output of the engine;   a travel manipulation device that receives a manipulation of an operator and outputs a travel command to allow the travel device to travel or to stop the travel device;   a rotation speed setting device that sets a rotation speed of the engine;   a seating sensor that outputs a seating signal indicating a sensed result of whether or not the operator is seated in an operator seat; and   a controller, wherein
 the controller receives an input of the travel command from the travel manipulation device, receives an input of a set value of the rotation speed of the engine from the rotation speed setting device, and receives an input of the seating signal from the seating sensor, and 
 when the travel command to allow the travel device to travel is issued, the set value of the rotation speed of the engine is lower than or equal to a predetermined value, and the operator is not seated in the operator seat, the controller makes the travel device unable to travel. 
   
     
     
         13 . A control system for a work machine, the control system comprising:
 a vehicular body;   an engine installed in the vehicular body;   a travel device that is attached to the vehicular body and travels by an output of the engine;   a travel manipulation device that receives a manipulation of an operator and outputs a travel command to allow the travel device to travel or to stop the travel device;   a rotation speed setting device that sets a rotation speed of the engine;   a seating sensor that outputs a seating signal indicating a sensed result of whether or not the operator is seated in an operator seat;   a notification device that performs notification to the operator; and   a controller, wherein
 the controller receives an input of the travel command from the travel manipulation device, receives an input of a set value of the rotation speed of the engine from the rotation speed setting device, and receives an input of the seating signal from the seating sensor, and 
 when the travel command to allow the travel device to travel is issued, the set value of the rotation speed of the engine is lower than or equal to a predetermined value, and the operator is not seated in the operator seat, the controller causes the notification device to perform the notification.