Asphalt finisher and power supply system for asphalt finisher

Abstract

An asphalt finisher is provided that includes a tractor; a hopper mounted on a front side of the tractor; a conveyor that conveys a paving material in the hopper to a rear side of the tractor; a screw that spreads the paving material, which is scattered on a road surface by the conveyor, in a vehicle width direction; a screed device that lays and levels the paving material, which is spread by the screw, at a rear side of the screw; an actuator that drives at least one selected from the group consisting of the tractor, the conveyor, the screw, and the screed device using electric power; a power storage unit; and a power supply unit that is connectable to an external device and can receive electric power supplied from the external device.

What is claimed is: 
     
         1 . An asphalt finisher, comprising:
 a tractor;   a hopper mounted on a front side of the tractor;   a conveyor that conveys a paving material in the hopper to a rear side of the tractor;   a screw that spreads the paving material, which is scattered on a road surface by the conveyor, in a vehicle width direction;   a screed device that lays and levels the paving material, which is spread by the screw, at a rear side of the screw;   an actuator that drives at least one component selected from the group consisting of the tractor, the conveyor, the screw, and the screed device using electric power;   a power storage unit; and   a power supply unit that is connectable to an external device and can receive electric power supplied from the external device.   
     
     
         2 . A power supply system for an asphalt finisher, the power supply system comprising:
 the asphalt finisher according to claim  1 .   
     
     
         3 . The power supply system for the asphalt finisher, according to  claim 2 ,
 wherein the power supply unit is configured to supply electric power from a power source of the external device to the power storage unit, and is configured to supply electric power from the power source of the external device to the actuator.   
     
     
         4 . The power supply system for the asphalt finisher, according to  claim 2 ,
 wherein the power supply unit is configured to supply both electric power from the power source of the external device and electric power from the power storage unit to the actuator.   
     
     
         5 . The power supply system for the asphalt finisher, according to  claim 2 , further comprising:
 a dump truck as the external device, where the dump truck includes a power source and a truck-side power supply unit,   wherein the power supply unit is electrically connectable to the truck-side power supply unit, and is configured to supply electric power from the power source of the dump truck to the power storage unit, thereby charging the power storage unit.   
     
     
         6 . The power supply system for the asphalt finisher, according to  claim 5 ,
 wherein the power supply unit is configured to receive electric power supplied from the dump truck, when the screed device spreads the paving material while the asphalt finisher is moved in a predetermined travel direction by the tractor, and   wherein the dump truck is configured to perform speed control based on speed of the asphalt finisher.   
     
     
         7 . The power supply system for the asphalt finisher, according to  claim 5 ,
 wherein the truck-side power supply unit is disposed at a rear side of the dump truck, and   wherein the power supply unit is arranged at a front side of the hopper, and is arranged at a position at which the power supply unit can receive electric power from the truck-side power supply unit, when the dump truck is docked on a front side of the asphalt finisher.   
     
     
         8 . The power supply system for the asphalt finisher, according to  claim 5 , further comprising:
 a detection unit that detects whether it is possible to perform power supply between the power supply unit and the truck-side power supply unit,   wherein, when the detection unit detects that it is possible to perform power supply between the power supply unit and the truck-side power supply unit, the power supply unit is configured to receive electric power supplied from the power source of the dump truck.   
     
     
         9 . The power supply system for the asphalt finisher, according to  claim 8 ,
 wherein the detection unit is an imaging device capable of detecting whether the power supply unit and the truck-side power supply unit are in connectable positions.   
     
     
         10 . The power supply system for the asphalt finisher, according to  claim 5 , further comprising:
 a detection unit that detects a charge rate of the power storage unit,   wherein the power supply system is configured to perform control of power supply from the truck-side power supply unit via the power supply unit based on the charge rate of the power storage unit detected by the detection unit.