Abstract: A construction machine makes it possible for an operator to linearly push a bucket by operating an arm in a pushing direction. A controller is configured to, in case a straight locus is selected by a bucket locus selecting device, calculate a constant flow rate ratio according to a boom initial angle that is an angle of a boom sensed by a boom angle sensor at a time point when an arm is operated in a pushing direction by an operation device, and control the delivery flow rate of a first hydraulic pump such that a hydraulic fluid is discharged from a boom cylinder cap chamber at a flow rate obtained by multiplying a flow rate of a flow supplied to an arm cylinder cap chamber by the flow rate ratio while the arm is operated in the pushing direction and there is no boom operating instruction.

Abstract: Provided is a construction machine in which travel operability is not impaired when a combined operation is performed in which a single-rod hydraulic cylinder is driven during a travel operation. A hydraulic excavator includes a controller that controls the delivery direction and delivery flow rate of a closed-circuit pump, opens and closes a travel switching valve and an assist switching valve, and controls the delivery flow rate of the open-circuit pump, according to a travel operation lever and a work operation lever. The controller holds the assist switching valve in a closed position irrespective of whether or not the work operation lever is operated in a case where the travel operation lever is operated.

Abstract: A disclosed document management system reduces the risk of information leakage and prevents an operation error by simplifying operations. The document management system includes an image forming apparatus with a scan unit for scanning a paper document into digitized document data; a user authentication server for user authentication; and an encrypted document server having encrypted folders for storing encrypted document data based on the access right of a user. The image forming apparatus includes an encryption unit configured to encrypt document data and a delivery unit configured to deliver encrypted document data to one of the folders in the encrypted document server to which access is allowed based on the access right of a user authenticated by the authentication server.