Work transfer apparatus and press machine
AssigneeKomatsu Industries Corporation
InventorsHidekazu Tokunaga, Masaaki Kashiwa
Life of this patent
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Abstract
A fixed-side connecting portion 151 is provided on an end of the fixed bar 141 while a movable-side connecting portion 152 is provided on an end of the movable bar 142. An air clamp 16 is housed within the fixed bar 141. By pneumatically driving the air clamp 16 while the movable-side connecting portion 152 is superimposed on an upper side of the fixed-side connecting portion 151, a clamp member 165 protrudes from a case 161 to be downwardly rotated and holds the movable-side connecting portion 152 against the fixed-side connecting portion 151. Since the clamp member 165 is pneumatically driven, a die replacement time can be shortened. In addition, since the air clamp 16 is housed within the fixed bar 141, the size of a transfer feeder 41 can be reduced.
Claims9
A workpiece transfer apparatus that transfers a workpiece to be pressed by a press machine, comprising:
- a bar assembly including a workpiece holder that holds the workpiece, at least part of the bar assembly being arranged substantially parallel to a transfer direction of the workpiece,
- wherein the bar assembly includes:
- a fixed bar adapted to be fixed within the press machine;
- a movable bar detachable from the fixed bar;
- and
- a connecting device that selectively connects the fixed bar and the movable bar,
- the connecting device includes:
- a fixed-side connecting portion that protrudes from an end of the fixed bar toward the movable bar;
- a movable-side connecting portion that protrudes from an end of the movable bar toward the fixed bar to be superimposed on the fixed-side connecting portion;
- and
- holding means for holding the movable-side connecting portion, and
- wherein the holding means includes:
- a holding member that is adapted to be advanced and retracted in a longitudinal direction of the fixed bar and when advanced in the longitudinal direction of the fixed bar, abuts an outer surface of the movable-side connecting portion and presses the movable-side connecting portion toward and against the fixed-side connecting portion to thereby hold the movable-side connecting portion against the fixed-side connecting portion;
- and
- driving means that is provided within the fixed bar for driving the holding member.
A press machine comprising:
- a workpiece transfer apparatus that transfers a workpiece to be pressed by a press machine,
- wherein the workpiece transfer apparatus includes a bar assembly including a workpiece holder that holds the workpiece, and wherein at least part of the bar assembly is arranged substantially parallel to a transfer direction of the workpiece,
- wherein the bar assembly includes:
- a fixed bar fixed within the press machine;
- a movable bar detachable from the fixed bar;
- and
- a connecting device that selectively connects the fixed bar and the movable bar,
- wherein the connecting device includes:
- a fixed-side connecting portion that protrudes from an end of the fixed bar toward the movable bar;
- a movable-side connecting portion that protrudes from an end of the movable bar toward the fixed bar to be superimposed on the fixed-side connecting portion;
- and
- holding means for holding the movable-side connecting portion, and
- wherein the holding means includes:
- a holding member that is adapted to be advanced and retracted in a longitudinal direction of the fixed bar and when advanced in the longitudinal direction of the fixed bar, abuts an outer surface of the movable-side connecting portion and presses the movable-side connecting portion toward and against the fixed-side connecting portion to thereby hold the movable-side connecting portion against the fixed-side connecting portion;
- and
- driving means that is provided within the fixed bar and for driving the holding member.
Dependencies are inferred from the claim text.