초록 ▼

A device for processing a concrete layer by water jets, comprising a jet tube on a carriage moveable to and fro along a guide. The jet tube is pivoted in planes substantially parallel to the guide and oscillates in planes making an angle with the guide. The jet tube is inclined in one direction alon

A device for processing a concrete layer by water jets, comprising a jet tube on a carriage moveable to and fro along a guide. The jet tube is pivoted in planes substantially parallel to the guide and oscillates in planes making an angle with the guide. The jet tube is inclined in one direction along the extension of the guide during the movement of the carriage along the guide, and a control unit ensures that pivoting of the jet tube with an angular velocity leading to movement of a nozzle of the jet tube along the guide with a velocity substantially equal to the velocity of the carriage is initiated at the same time as the carriage is stopped in an end position, and the control unit starts the movement of the carriage in an opposite direction when the jet tube has finished its pivoting movement.

대표청구항 ▼

A device for material removing processing of a material layer, in particular a concrete layer, said device comprising a carrier (1), a guide (5) arranged on the carrier, a carriage (6) movable to and fro along the guide and carrying a jet tube (7) for directing a high pressure fluid jet towards the

A device for material removing processing of a material layer, in particular a concrete layer, said device comprising a carrier (1), a guide (5) arranged on the carrier, a carriage (6) movable to and fro along the guide and carrying a jet tube (7) for directing a high pressure fluid jet towards the material layer, a source for supplying high pressure fluid to the jet tube, at least one first driving means (10) for driving the carrier in a direction making an angle with the guide, at least one second driving means (11) for driving the carriage along the guide, at least one third driving means (12) for pivoting the jet tube about an axis (13) making an angle with the longitudinal direction of the guide between extreme positions in which a nozzle (14) on the jet tube is directed obliquely either in, or opposed to, the direction of movement of the carriage (6), and a control unit (16) arranged to control each of the driving means and, when the carriage has reached an end position along the guide, to control the at least one third driving means (12) to pivot the jet tube (7) selectively between first and second extreme positions, such that the nozzle thereof is directed with substantially the same angle of inclination with respect to the longitudinal direction of the guide when the carriage moves in each of its two directions of movement along the guide, characterized in that the control unit (16) includes means for controlling the at least one third driving means (12) substantially simultaneously as the carriage (6) is stopped in a first end position to initiate pivoting of the jet tube (7) with an angular velocity leading to a velocity of the nozzle (14) along the guide (5) being substantially equal to the velocity of the carriage along the guide, said control unit (16) further including means for controlling the at least one second driving means to initiate carriage movement towards a second end position substantially simultaneously as the pivoting of the jet tube to one of said extreme positions by said at least one third driving means is terminated.