Recorder null of fragmentation job tonnage for engineering works job

摘要

PURPOSE: To accurately record the workload of a reinforced concrete crusher. ;CONSTITUTION: A power shovel is equipped with a hydraulic pump 19 driven by a diesel engine, a hydraulic cylinder actuated by the hydraulic pump 19, and a crusher 1 or the like comprising a pair of jaws opened and closed by the hydraulic cylinder, and is used in the work of crushing concrete. A hydraulic pressure sensor 27 is mounted to a hydraulic duct 25a connecting the hydraulic pump 19 to the hydraulic cylinder and is used to detect hydraulic pressure within the hydraulic duct 25a and a recoder is actuated by an electric signal indicative of detection of the hydraulic pressure to record the workload of the crushing work alone.;COPYRIGHT: (C)1993,JPO&Japio