Abstract: [Problem] To improve performance by making it possible to properly conduct minus crown paving work in a paving work width region in which paving work in a minus crown has been impossible in a leveling device which is provided with a main screed and a pair of extendable screeds having almost the same width as the width of the main screed and is of any type among a type in which the pair of extendable screeds is disposed behind the main screed, a type in which the pair of extendable screeds is disposed in front of the main screed, and a type in which one and the other of the pair of the extendable screeds are disposed, respectively, in front of and behind the main screed.
June 18, 2012
December 18, 2014
SUMITOMO (SHI) CONSTRUCTION MACHINERY CO., LTD.
Abstract: A screed device in a road-paving vehicle such as an asphalt finisher, enabling the width of pavement to be steplessly changed up to about three times the width of the main screed through a simple operation. The screed device is so constituted that a pair of extensible screeds 15, 16 having a width nearly equal to the width of a main screed 7 are arranged back and forth in the direction of progress of the main screed, wherein supports 27, 28 are allowed to move in the direction of width of pavement being supported by support portions 23, 24 provided on both sides at the rear upper portions of the main screed 7, said extensible screeds 15, 16 are supported by said supports 27, 28 so as to be freely moved in the direction of width of pavement, and the extensible screeds 15, 16 are moved by the feeding devices such as hydraulic cylinders in the directions of width of pavement but opposite to each other from the rear positions of the main screed 7.
May 15, 2000
Date of Patent:
July 22, 2003
Sumitomo (Shi) Construction Machinery Co., Ltd.