Patent ID: 8556247

Claim:
A vise provided with a movable jaw device having separated approaching and clamping steps in a bending machine die configured for bending an elongated workpiece (T), said vise ( 4 ) comprising: a body ( 6 ) fixed on a die, the body ( 6 ) comprising i) two abreast supporting walls ( 8 , 9 ), ii) a fixed jaw portion ( 7 ) projecting downward and located adjacent a groove of a die, the fixed jaw portion ( 7 ) being integral with the die, and iii) a movable jaw device ( 10 ) having a movable jaw ( 11 ), wherein the movable jaw ( 11 ) has a gripping end ( 22 ) and an opposite rear end ( 23 ), wherein the movable jaw ( 11 ) is approachable and removable with respect to the fixed jaw portion ( 7 ), wherein the movable jaw ( 11 ) moves between a closed position and an opened position with respect to the elongated workpiece (T); a shaft ( 26 ) transversally mounted in the rear end ( 23 ) of the movable jaw ( 11 ); an operation mechanism ( 20 ) mounted on an external side of one of said supporting walls ( 8 ) and connected to rotate the movable jaw device ( 10 ), wherein operation mechanism ( 20 ) comprises i) first hydraulic cylinder ( 19 ) having a first cylinder rod ( 18 ), a rack member ( 15 ) connected to the first cylinder rod ( 18 ), ii) a pinion ( 14 ) connected to the movable jaw ( 11 ) and engaging the rack member ( 15 ), and iii) a movable jaw clamping mechanism comprising a second hydraulic cylinder ( 28 ) having a second cylinder rod ( 27 ) connected with the shaft ( 26 ), the second hydraulic cylinder ( 28 ) being a) swing mounted by the second cylinder rod ( 27 ) being connected with the shaft ( 26 ), and b) transversally pivoted in the rear end ( 23 ) of the movable jaw ( 11 ); opposite trunnion spindles ( 29 , 30 ) laterally projecting from said second hydraulic cylinder ( 28 ) and arranged as cam followers on upper edges of the supporting walls ( 8 , 9 ); and first and second notches ( 33 , 34 ) located respectively in the upper edge ( 31 , 32 ) of each of the supporting walls ( 8 , 9 ), each of the first and second notches ( 33 , 34 ) positioned to receive a corresponding one of the projecting trunnion spindles ( 29 , 30 ) so that an extension of the second cylinder rod ( 27 ) is locked in position, by the projecting trunnion spindles ( 29 , 30 ) being in the respective first and second notches ( 33 , 34 ), to keep the movable jaw ( 11 ) in the closed position.